, Description:FIELD OF INVENTION
[001] The present disclosure, in general, relates to an assembly used for suction of hazardous gases released during welding. More particularly, the present disclosure relates to the assembly for suction of hazardous fumes released during welding of joints in the orbital TIG (tungsten inert gas) welding machine.
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] The orbital TIG welding is an automated process of GTAW (Gas Tungsten Arc Welding), widely used in the boiler industry. In a high temperature high pressure boiler there are more than 20,000 shop weld joints/boiler, which has to be welded using this GTAW process.
[004] The machine is mainly used for welding high chromium alloy tubes like T12, T22, T23, T91, T92, Stainless steel – 347, super 304h and also Nickel based alloy tubes like Inconel 617.
[005] The above materials being used are high chrome alloys and nickel alloys which produce fumes which are highly harmful when frequently exposed. As per ANSI Standard Z49.1 local exhaust ventilation has to be provided for such materials and processes. Existing ventilation methods cannot be used for this type of application as the machine is movable and welding has to be done at any location within boundary of the frame housing the welding machine and its components. The frame is motorized and is movable, so the suction system cannot be fixed at a location and it has to be a part of the welding machine. The distance of the inlet suction head from the job has to be optimum so that it does not exceed 0.5 m/ sec air velocity, as per ANSI Standard Z49.1 such that the ventilation does not affect the arc or the shielding gas during welding. So, a process with a device is required to eliminate the above drawbacks.
OBJECTIVE OF THE INVENTION
[006] It is therefore an object of present disclosure to provide an assembly for suction of the hazardous gases released during welding in the Orbital TIG welding machine.
[007] Another primary object of the present disclosure is to provide optimized distance between the suction head of the flexible hose and the job as per the ANSI standards.
SUMMARY OF THE INVENTION
[008] This summary is provided to introduce concepts related to assembly that helps in suction of hazardous fumes released during welding by an orbital TIG welding machine. The concepts are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
[009] In an embodiment, the present disclosure provides an assembly for suction of hazardous fumes in an orbital TIG (tungsten inert gas) welding machine, the assembly comprising a pump and motor sub-assembly, wherein the pump and motor sub-assembly is placed above a base of a machine frame, a flexible hose connected to an inlet pipe of the pump and motor sub-assembly, wherein a suction end of the flexible hose is closed with a wire mesh, a first fixture comprising a “U” bolt and a sliding frame wherein the U bolt and the sliding frame attached to the machine frame , and a second fixture comprising a job clamp and a hose clamp, wherein the job clamp and the hose clamp connected by a rod.
[0010] In an aspect, the present disclosure provides the pump and motor sub-assembly comprising a pump casing, a motor, an inlet pipe and an outlet pipe that establishes a connection by means of plurality of fasteners.
[0011] In an aspect, the present disclosure provides the pump casing fixed on a blower base stand which is further welded to a blower plate.
[0012] In an aspect, the present disclosure provides the flexible hose whose length is calculated on the basis of the machine frame width.
[0013] In an aspect, the present disclosure provides the second fixture in which the rod that connects the job clamp and the hose clamp maintain an optimum distance between the job and the flexible hose.
[0014] 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.
BRIEF DESCRIPTION OF THE ACCOMPANYING
[0015] 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 methods that are consistent with the subject matter as claimed herein, wherein:
[0016] Figure 1 illustrates a view of the pump and motor sub assembly;
[0017] Figure 2 illustrates a first fixture for holding the various components of the assembly.
[0018] Figure 3 illustrates a second fixture for holding various components of the assembly.
[0019] Figure 4 illustrates an overall view of the assembly used for suction of hazardous fumes released during welding by an orbital TIG welding machine;
DETAILED DESCRIPTION OF THE INVENTION
[0020] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0021] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0022] The present disclosure provides an assembly for suction of the hazardous fumes in the Orbital TIG welding machine.
[0023] Figure 1 illustrates a pump and a motor sub-assembly (100). In the pump and motor sub-assembly (100), the pump casing (104) is fixed on a blower base stand (114) which is further welded to a blower plate (112). Further, the pump casing (104) was assembled with a motor (110) having capacity of 3HP, a plurality of blower side plate (not shown), a hub (not shown), a wing plate (not shown), an inlet pipe (106) and an outlet pipe (102) by means of plurality of fasteners (not shown).
[0024] Figure 2 illustrates the first fixture (200) comprising “U” bolt (202) hanging from the sliding arrangement (204) of the machine frame (400) (not shown) and is used to support the flexible hose (310). The length of the flexible hose (310) (not shown) is calculated on the basis of the machine frame (400) width.
[0025] Figure 3 illustrates the second fixture (300) that maintain the optimum distance (x) between the job (312) and the suction end (308) of the flexible hose (310). In this fixture, a job clamp (302) is provided to tight the job (312) which is further connected to another clamp (304) to permanently hold the suction end (308) of the flexible hose (310). The length of the rod (306) that connects the job clamp (302) and the hose clamp (304) decides the distance between the job (312) and the flexible hose (310), thus ensuring the air velocity as required. This configuration of the second fixture (300) maintain the constant suction velocity of air as per the ANSI norms and will not disturb the arc or the shielding gas. Here, the suction end (308) of the flexible hose (310) is closed with a wire mesh (314) to avoid suction of chips or tools.
[0026] Figure 4 illustrates the pump and the motor sub–assembly (100) attached to the base of the machine frame (400) used in orbital TIG welding. The dimension of the sub-assembly (100) is calculated as per the space available in the machine frame base (402). Here the pump and motor sub-assembly (100) is fixed to the machine frame (400) base (402) and a flexible hose (310) was connected to the inlet pipe (106) available in the pump and motor sub-assembly (100). The suction end (308) of the flexible hose (310) is closed with a wire mesh (314) to avoid suction of chips clearly illustrated in the Figure 3. The flexible hose (310) is supported by means of “U” bolt (204) hanging from the sliding arrangement (202) already available in the machine frame (400). The length of the hose (310) was calculated from the machine frame width.
[0027] The working principle is explained as followed:
[0028] Firstly, the job (312) is made ready for welding. Here, a fixture job clamp (302) with provision to tighten the job (312) is designed and it is connected to another clamp (306) to permanently hold the end of the hose (310). The length of the rod (304) connecting the job clamp (302) and the hose clamp (306) decides the distance between the job (312) and the hose (310), thus ensuring the air velocity as required. After completing the arrangement, the welding of the job (312) is started.
[0029] Now the suction activity is performed without disturbing the welding arc or the shielding gas. The pump is switched on once the welding is started. The fumes are sucked and exhausted through the outlet pipe (102) and later to the atmosphere through the exhaust in the roof (not shown).
[0030] Thus, with the assembly described in the present disclosure, various technical problems of the state of the art are resolved. Also, although a number of exemplary method options are described herein, those skilled in the art can appreciate that the assembly that helps in suction of hazardous fumes released during welding by an orbital TIG welding machine, without deviating from the scope of the subject matter of the present disclosure.
[0031] Further, it will be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described or shown herein, embody the principles of the invention and are included within its scope.
[0032] Furthermore, all examples recited herein are principally intended expressly to be only for pedagogical purposes to aid the reader in understanding the principles of the invention and the concepts contributed by the inventor(s) to furthering the art and are to be construed as being without limitation to such specifically recited examples and conditions. Also, the various embodiments described herein are not necessarily mutually exclusive, as some embodiments can be combined with one or more other embodiments to form new embodiments.
[0033] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

Claims:1. An assembly (400) for suction of hazardous fumes in an orbital TIG (tungsten inert gas) welding machine, the assembly comprises:
a pump and motor sub-assembly (100), wherein the pump and motor sub-assembly (100) is placed above a base (402) of a machine frame (400);
a flexible hose (310) connected to the inlet pipe (106) of the pump and motor sub-assembly (100),wherein the suction end (308) of the flexible hose (310) is closed with a wire mesh (314);
a first fixture (200) comprising a “U” bolt (204) and a sliding arrangement, wherein the first fixture (200) is attached to the machine frame (400) ;and
a second fixture (300) comprising a job clamp (302) and a hose clamp (306), wherein the job clamp (302) and the hose clamp connected by a rod (304).
2. The assembly (400) as claimed in claim 1, wherein the pump and motor sub-assembly (100) comprising a pump casing (104), a motor (110), an inlet pipe (106) and an outlet pipe (102) that are connected to one another by means of plurality of fasteners.
3. The assembly (400) as claimed in claim 2, wherein the pump casing (104) is fixed on a blower base stand (114) which is further welded to a blower plate (112).
4. The assembly (400) as claimed in claim 1, wherein the length of the flexible hose (310) is calculated on the basis of the machine frame (400) width.
5. The assembly (400) as claimed in claim 1, wherein the rod (304) that connects the job clamp (302) and the hose clamp (306) maintain an optimum distance between the job (312) and the flexible hose (310).