AN AUTOMATIC AND INTELLIGENT TUBE DEMAGNETIZER DEVICE FOR REMOVING RESIDUAL MAGNETISM FROM STEEL TUBES

FIELD OF THE INVENTION:
[001] The invention is directed to an Automatic and Intelligent Tube Demagnetizer Device for removing residual magnetism from steel tubes. Thus, the present invention relates to an autonomous tube demagnetizer device for removing residual magnetism from steel tubes of any grade and size before butt welding of tube ends, either automated or manual. More particularly, a system for removing inherent or induced magnetism present in steel tubes which causes magnetic arc blow leading to improper welding and joint failures. The invention can be applied to any tube material susceptible to magnetism.

BACKGROUND OF THE INVENTION:
[002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.

[003] Heavy engineering industries, especially boiler manufacturers, use various alloys of steel in different grades and sizes as raw materials for their products. These steel alloys are formed into finished goods by processes like cutting, welding, cold and hot forming. Welding is predominantly employed to fuse (or join) similar or dissimilar pieces of metals. In a thermal power plant, pressurized water or steam are circulated inside hollow tubes made of different grades of alloy steels depending on the pressure and temperature they have to withstand. Alloy steel tubes (as raw materials) of varying lengths are welded together to form long serpentine coils or panels comprising the pressure part components in a boiler. Welding can be either automatic, semi-automatic or manual depending on the process requirement. Welding methodology can be either of MMAW (Manual Metal Arc Welding), Gas Metal Arc Welding (GMAW), Gas Tungsten Arc Welding (GTAW) or Submerged Arc Welding (SAW) processes. In all the processes, a welding arc is generated between the welding electrode and the parent metal. This arc melts the filler wire which gets deposited in the pre-formed valley between the jobs being fused together. In case of hollow tubes, the ends/edges are chamfered into grooves and butted together for welding. These tubes, made out of steel alloys, are susceptible to magnetism. They gain magnetic properties during their manufacturing (like end cutting or chamfering) or from exposure to either earth’s magnetic field or any other strong magnetic fields/magnets during their storage or transit. In the case of tubes used for boiler pressure parts, magnetism is generally induced if the material is left buried in the earth's magnetic field over time or by residual magnetism left by magnetic inspection or by simple actions such as plasma cutting or material stress. The magnetism in a material is measured in air at the location desired along the tube. The unit of measurement is Gauss. On individual tubes, it may only be a few tens of Gauss, especially at the ends of the tube where it matters. However, when two tubes with residual magnetism are fitted up for welding, the field becomes concentrated in the gap between the two tubes and increases in magnitude due to the compounding of the magnetic field intensity.

[004] Magnetic arc blow (or deflection) is the phenomenon where the welding arc gets deflected (or extinguished) away from the point of welding due to the interaction between the magnetic field of the welding arc and the field of the residual magnetism. This causes a displacement of the arc relative to the joint. This can cause poor quality welding or even weld defects when occurring continuously leading to very expensive project delays. Arc blow depends on the direction and magnitude of the residual magnetic field. ISO 3183:2007 (E) requires that four readings shall be taken ˜ 90° apart around the circumference of each end of the tube/pipe and the average of the four readings shall be under 30 Gs, and no one reading shall exceed 35 Gs when measured with a Hall-effect gaussmeter or equivalent values when measured with another type of instrument. Any tube or pipe that does not meet the above requirements shall be considered unsuitable for welding. Practically, the permissible value is even lower (= 5Gs at the joint location). There are basically two well-known ways to avoid magnetic arc blow. First is to remove the magnetism altogether in the entire length of the tube. Second way is to reverse the local magnetism using externally applied fields. To remove the magnetism completely, the material has to be heated to the Curie Point temperature, typically 1000 °C and allowed to cool in a zero field. This is feasible for small components, but for large tubes or pipes, the energy cost and magnetic leak back makes it impractical. The process is also comparatively time consuming. The second technique requires that the tube is placed in an alternating current (AC) field that is slowly reduced to zero. This process is also slow and may not be effective at all if the strength of the demagnetizing field is too low. Also, most degaussing systems operate at line frequency (50/60 Hz), which has a poor skin penetration into the material, so the process may be successful in degaussing the top layer, but the magnetism persists underneath. Finally, both methods provide no constant online feedback regarding their operation and require manual intervention to check the results of the process. Magnetism can be checked only after completing the process, which can be a hit or miss. This low success rate can result in rework, leading to further project delays.

[005] In view of the above, it is required to design a device which can address the aforesaid shortcomings.

PRIOR ART:
[006] In the prior arts, demagnetization is carried out either by supplying current pulses of alternating polarities in a constant duration or by reducing the current to zero, operating at line frequency.

[007] In the US Patent No. US4158873, the inventors have disclosed methods of demagnetization by passing tubes through a coil assembly through which pulses of current are applied to produce magnetic field of alternating polarity and of constant durations and magnitude. The apparatus described is bulky and not easily portable. Moreover, any miniscule mismatch in either the magnitude of current pulse or the duration will not remove the magnetism completely.

[008] In the US Patent No. US4360854, demagnetizing is done again by reversing the polarity in a series of steps while reducing the current to zero in successive steps. The apparatus described is also bulky and requires prior knowledge of the degree of magnetism in the material. Also, a complex control system may be required to control, synchronize and vary the pulse frequency, alternating polarity and repetition rate.

[009] In the US Patent No. US20110100981, the inventors describe the steps of applying a substantially uniform electromagnetic field to a magnetized object under conditions to demagnetize it. The applying step comprises applying the electromagnetic field at an opposite polarity to said magnetized object. This method does not ensure the complete removal of residual magnetism.

[0010] In the Indian Patent No. 367528, the inventors describe a portable apparatus for removing residual magnetism in the tubes, irrespective of its polarity or magnitude. The invention operates on low frequency AC unlike the previous inventions. This method of degaussing guarantees penetration into the material. However, in all the cited prior inventions, there is no online feedback from the process which can lead to increase in cycle time till the intended results are achieved. Results have to be manually checked. Finally, all these inventions employ AC at line or low frequencies which can lead to unsafe conditions (especially to the operator) during operation of the equipment.

[0011] On the other hand, the present invention guarantees the complete and automatic removal of residual magnetism in the tubes, irrespective of its polarity or magnitude. The location to be demagnetized can also be easily adjusted in case further areas along the tube are also to be covered. The apparatus is easy to use, requires no manual intervention once switched on. It is also compact and handy. It can be either fixed on a machine/work centre or used as a portable device. Therefore, the present invention has been introduced.

OBJECTS OF THE INVENTION:
[0012] It is, therefore, an object of the invention to develop an Automatic and Intelligent Tube Demagnetizer Device, which is efficient and automatic for removing the inherent magnetic properties present in the hollow alloy steel tubes before carrying out any type of welding.

[0013] Another objective of the invention is to provide an Automatic and Intelligent Tube Demagnetizer Device, which is intelligent, fast and easy to use.

[0014] Still another object of the invention is to provide an Automatic and Intelligent Tube Demagnetizer Device, which is simple in construction.

[0015] Yet another objective is to ensure safe working voltages for man and machine while demagnetization is in progress.

[0016] These and other objects and advantages of the present invention will be apparent to those skilled in the art after a consideration of the following detailed description taken in conjunction with the accompanying drawings in which a preferred form of the present invention is illustrated.

SUMMARY OF THE INVENTION:

[0017] One or more drawbacks of conventional systems and process are overcome, and additional advantages are provided through the apparatus/composition and a method as claimed in the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be part of the claimed disclosure.
[0018] In this apparatus, the demagnetizing coil along with the sensing and control circuits are completely housed inside an insulating wooden frame, which ensures safety from any mishaps. The entire system operates on 230V AC, 50 Hz. Copper wires wound concentrically over a hollow cylindrical bobbin forms the demagnetizing or degaussing coil. Tubes to be demagnetized get positioned inside the hollow bobbin (effectively, the housing frame). The coil is powered by an electrically safe 24 V DC supply, which is supplied by a power supply module inside the frame. The sensor for detecting magnetism (or magnetometer) is positioned at the heat affected zone (HAZ) of the welding process (the area along the length of the tube which gets metallurgical affected by welding). Its position can be changed by sliding the adjustment shaft along the mounting frame if other locations are to be demagnetized along the tube. The system is always in ready mode. If the magnetometer senses that the residual magnetism values are higher than the permissible limit of ±5 Gs, it automatically switches on the intelligent controller. The controller and the magnetometer are powered by an electrically safe 5V DC supply, which is supplied by another power supply module inside the frame. Both the 24V DC and 5V DC power supply modules function on the common 230V AC, 50Hz mains supply. Irrespective of the direction of the inherent or induced magnetic field present in the tube, the controller activates a series of relays (or electronic switches) which vary the connected load in the current flow path of the demagnetizing coil, resulting in constant decreasing amplitude of induced magnetic field. The controller constantly monitors the magnetism level at the HAZ through the magnetometer and intelligently changes the relay activation methodology at the end of each cycle. This process is automatically repeated by the controller till magnetic field at the HAZ drops below ±5 Gs. The entire process takes anywhere from a few seconds to nearly 60 seconds, depending on the strength of residual magnetism at the start of the process. The apparatus also displays the strength of magnetic field currently being sensed by the magnetometer. This system is independent of the direction of the inherent magnetic field in the tubes. The demagnetized tubes can then be sent to any welding process without the fear of rejection due to magnetic arc blow.
[0019] The controller regulates the magnetic field generated by the demagnetizing coil based on active inputs from the magnetism sensor by controlling the load values in the circuit using a dedicated relay module.

[0020] The apparatus brings down the residual magnetism within the permissible limits of ±5 Gs by operating in an active, closed-loop feedback mechanism.

[0021] The controller intelligently controls the operation of the system automatically based on active inputs of magnetism levels from the sensor and operates without any manual inputs and irrespective of the inherent levels or direction of magnetism present in the tube/pipe.

[0022] Thus, the automated apparatus provides for an efficient demagnetized tubes for welding to form various coils which form the pressure part components in the boiler of a thermal power plant.

[0023] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

[0024] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.

[0025] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
[0026] The illustrated embodiments of the subject matter will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and processes that are consistent with the subject matter as claimed herein, wherein:-

[0027] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. Some embodiments of system or methods in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:

[0028] Figure 1 shows the automatic and intelligent tube demagnetizer device according to the present invention.

[0029] Figure 2 shows the internal arrangement of the device in accordance with the invention.

[0030] Figure 3 shows the schematic of system’s control logic in operation according to present invention.

[0031] The figures depict embodiments of the disclosure for purposes of illustration only. One skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS WITH REFERENCE TO THE ACCOMPANYING DRAWINGS:

[0032] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.

[0033] The present invention makes a disclosure regarding a technology pertaining to an Automatic and Intelligent Tube Demagnetizer Device for removing residual magnetism from steel tubes [T].

[0034] Now, reference may be made to Figure 1 showing the automatic demagnetizer apparatus and Figure 2 showing its internal arrangements.

[0035] The apparatus comprises of wooden frame [1] forming the top, bottom and sides into a hollow cuboid (or hexahedron). The demagnetizing coil [2] is placed centrally inside the hollow frame [1]. The coil [2] comprises of a PVC, hollow, cylindrical-shaped bobbin [3] over which copper wires [4] are concentrically wound over the entire length [?] of the bobbin. These wires [4] carry the varying electrical current which is supplied by the 24V DC power supply module [5]. The thickness of the copper wire is suitably chosen to easily carry the designated current from the 24V DC power supply module [5]. The diameter [?] of the hollow bobbin [3] is chosen to enable it to easily seat on the outer surface of tubes of different outer diameters [OD].

[0036] The number of turns [?] of the copper wires [4] wound over the bobbin [3] is arrived by deciding the length [?] of the bobbin and the thickness of the copper wire to be wound over it. The length [?] of the bobbin is chosen such that it covers the entire heat affected zone (HAZ) of the welding process. The intelligent controller [6], also placed inside the frame [1], regulates the supply across the coil [2]. The magnetic sensor or magnetometer [7] is located at the tip of the adjustable positioner shaft [8]. This shaft [8] runs from the front to back of the apparatus and is positioned along the middle of the frame [1], aligned with the center path of the degaussing coil [2]. The shaft’s [8] length can be changed/modified according to the application and need of the apparatus. It is adjusted to position the magnetometer [7] at the exact location for intended demagnetization. Both the intelligent controller [6] and the magnetometer [7] are powered by a separate 5V DC power supply module [9], also placed modularly inside the apparatus. The controller [6] and the magnetometer [7] communicate via a two-wire coaxial communication cable. The set of relays (or electronic switches) with their respective control circuits are placed on a specially designed relay module [10], which is also positioned modularly inside the apparatus. The control section of the relay module [10] functions on 5V DC whereas the power section functions on 24V DC to power the degaussing coil [2].

[0037] The ON/OFF toggle switch [11] powers ON the apparatus from the 230V AC, 50Hz supply. The power status is indicated by the Power ON LED [12]. The controller [6] and magnetometer [7] are powered ON by the Demag ON toggle switch [13]. Switching ON this toggle [13] puts the device in ready mode. This state is indicated by the Demag ON LED [14]. The magnetometer [7] starts sensing the magnetic field intensity continuously and sends feedback to the controller [6]. The sensed levels of magnetism (in Gs) are displayed on the LCD display [15] by the controller [6]. When the controller [6] reads residual magnetism levels beyond the permissible limit of ±5 Gs from the magnetometer [7], it starts the demagnetization process. The process inside the controller [6] intelligently changes the relay module [10] activation methodology to vary the magnetic field generated from the degaussing coil [2]. This process is continued till the levels of magnetism drops below ±5 Gs, indicating the completion of the demagnetization process. The Demag Done LED [16] glows when this state is achieved along with short beep for 5 seconds from the buzzer [17]. The demagnetization process of the tube is now complete, and the final levels of magnetism are also displayed on the LCD display [15] for information. Since the entire process is a closed-loop operation, the system is independent of material, thickness, diameter of the tube and also of the inherent levels and direction of magnetism present. Ventilation holes [18] are provided on both front and back sides of the frame [1] to provide air circulation inside the apparatus. Provision of Lifting handle [19] makes the device easy to handle and transport anywhere.

[0038] Referring to Figure 3 indicating the control logic of the entire system. The apparatus operates on 230V AC, 50Hz power supply. The 24V DC power supply module [5] powers the degaussing/demagnetizing coil [2] through a variable resistance assembly [20] that acts as a load in the current path to the coil [2]. The actual value of resistance in the current path is intelligently decided by the controller [6] based the continuous magnetism level input received from the magnetometer [7]. The controller [6] regulates the resistance (and thereby the current and magnetic field across the coil [2]) through the relay module [10]. Both the controller [6] and the magnetometer [7] are powered by the 5V DC power supply module [9] and communicate with each other through a two-wire coaxial communication cable.

[0039] The entire automatic demagnetization process takes anywhere from a few seconds to nearly 60 seconds, depending on the strength of residual magnetism at the start of the process.

[0040] The materials given above are as example without restricting scope of the invention to the same. Thus other materials readily apparent to a person skilled in the art are understood to be within preview of the invention.

ADVATAGES OF THE INVENTION:
[0041] Complete and automatic removal of residual magnetism in the tubes, irrespective of its polarity or magnitude.
[0042] It is easy to use, requires no manual intervention once switched on.
[0043] It is compact and handy.
[0044] It is intelligent, simple in construction, fast.
[0045] Ensures safe working voltages for man and machine while demagnetization is in progress.

WORKING OF THE INVENTION:
[0046] The device can be used either in conjunction with automatic/semi-automatic welding machines or as a standalone device. When used alongside other machines, the demag ON switch can be interlinked with the machine operation so that the system functions whenever the tubes are loaded onto the machines. When used as a standalone device, the device can be positioned along the tube end (or any other location). Since the entire system is completely automatic and closed-loop with feedback, the device automatically switches on when magnetism levels exceed the permissible values of ±5 Gs and intelligently controls the output till the values reach the acceptable levels. This works irrespective of the polarity or magnitude of the residual magnetism or its use as a standalone device or in conjunction with other welding machines.

TEST RESULTS:
[0047] The device has been successfully tested on alloy steel tubes of diameters ranging from 33 mm to 76 mm having varying material compositions like SA210 Grade C, SA213 Grade 12, SA213 Grade 22, SA213 Grade 23, SA213 Grade T91 and SA213 Grade T92. The invention reduced the residual magnetism levels (ranging from ±7 Gs to ±11 Gs) in the tubes to below the acceptable limit of = ±5 Gs. The time for demagnetization ranges from 14 seconds to 54 seconds.

[0048] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.

[0049] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.

[0050] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particulars claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogues to “at least one of A, B and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances, where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B”.

[0051] The above description does not provide specific details of manufacture or design of the various components. Those of skill in the art are familiar with such details, and unless departures from those techniques are set out, techniques, known, related art or later developed designs and materials should be employed. Those in the art are capable of choosing suitable manufacturing and design details.

[0052] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. It will be appreciated that several of the above-disclosed and other features and functions, or alternatives thereof, may be combined into other systems or applications. Various presently unforeseen or unanticipated alternatives, modifications, variations, or improvements therein may subsequently be made by those skilled in the art without departing from the scope of the present disclosure as encompassed by the following claims.

[0053] The claims, as originally presented and as they may be amended, encompass variations, alternatives, modifications, improvements, equivalents, and substantial equivalents of the embodiments and teachings disclosed herein, including those that are presently unforeseen or unappreciated, and that, for example, may arise from applicants/patentees and others.

[0054] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

WE CLAIM:

1. An Automatic and Intelligent Tube Demagnetizer Device for removing residual magnetism from steel tubes [T] comprising of a hollow frame [1] with demagnetizing coil [2] placed centrally inside the hollow frame [1], wherein the coil [2] comprises of a hollow bobbin [3] over which copper wires [4] are concentrically wound over the entire length [?] of the bobbin and the tubes to be demagnetized are positioned inside the hollow bobbin [3];
an intelligent controller [6] is placed inside the frame [1] to regulate the supply across the coil [2], a shaft [8] runs from the front to back, is positioned along the middle of the frame [1] and aligned with the center path of the coil [2], in which a magnetic sensor/magnetometer [7] is located at the tip of the adjustable positioner shaft [8] for pinpointing the desired location to be demagnetized.

2. The Automatic and Intelligent Tube Demagnetizer Device as claimed in claim 1, wherein the frame [1] forming hollow cuboid /hexahedron is made of insulating material including wood.

3. The Automatic and Intelligent Tube Demagnetizer Device as claimed in claim 1 or 2, wherein the bobbin [3] is made of material including PVC, which is cylindrical-shaped.

4. The Automatic and Intelligent Tube Demagnetizer Device as claimed in claims 1-3, wherein the wires [4] carry the varying electrical current which is supplied by the 24V DC power supply module [5], in which thickness of the copper wire is selected to carry the designated current from the 24V DC power supply module [5], and the diameter [?] of the hollow bobbin [3] is selected to enable it to seat on the outer surface of tubes of variable outer diameters [OD].
5. The Automatic and Intelligent Tube Demagnetizer Device as claimed in claims 1-4, wherein the number of turns [?] of the copper wire [4] wound over the bobbin [3] is according to the length [?] of the bobbin and the thickness of the copper wire to be wound over it, in which the length [?] of the bobbin is selected that it covers the entire heat affected zone (HAZ) of the welding process.

6. The Automatic and Intelligent Tube Demagnetizer Device as claimed in claims 1-5, wherein the shaft’s [8] length is changed/modified according to the application and need of the device and is adjusted to position the magnetometer [7] at the exact location for intended demagnetization.

7. The Automatic and Intelligent Tube Demagnetizer Device as claimed in claims 1-6, wherein the intelligent controller [6] and the magnetometer [7] are powered by 5V DC power supply module [9], and placed modularly inside the device, in which the controller [6] and the magnetometer [7] communicate via a two-wire coaxial communication cable, wherein the set of relays/electronic switches with their respective control circuits are placed on a relay module [10], which is positioned modularly inside the device, wherein the control section of the relay module [10] functions on 5V DC and the power section functions on 24V DC to power the degaussing coil [2].

8. The Automatic and Intelligent Tube Demagnetizer Device as claimed in claims 1-7, wherein ON/OFF toggle switch [11] powers ON the device from the 230V AC, 50Hz supply; the power status is indicated by Power ON LED [12]; the controller [6] and magnetometer [7] are powered ON by Demag ON toggle switch [13], in which Switching ON this toggle [13] puts the device in ready mode and this state is indicated by the Demag ON LED [14];the sensed levels of magnetism (in Gs) are displayed on display [15] by the controller [6].

9. The Automatic and Intelligent Tube Demagnetizer Device as claimed in claims 1-8, wherein the Demag Done LED [16] glows when the demagnetization is achieved along with short beep for 5 seconds from the buzzer [17], and the final levels of magnetism are displayed on the LCD display [15] for information.

10. The Automatic and Intelligent Tube Demagnetizer Device as claimed in claims 1-9, wherein multiple Ventilation holes [18] are provided on both front and back sides of the frame [1] to provide air circulation inside the device, and a Lifting handle [19] is located at one side of the device.