DESC:DRILLING JIG FOR FRAME RING ASSEMBLY COUNTER HOLES DRILLING AT ASYMMETRIC LOCATIONS IN DIFFERENT PITCH CIRCLES”

FIELD OF INVENTION:

This invention relates to the method of holes drilling in ring assembly (Top frame ring & Bottom frame ring) at asymmetric locations in different pitch circle diameter using Universal Radial Drilling Machine. The ring assembly is used to hold the SS Grid flats between the ring assembly using weld pin which is called as Grid Assembly. The Grid assembly serve two important functions in any Steam Generator and Heat Exchanger. First, they support the tubes during assembly and operation and help prevent vibration from flow-induced eddies. Second, they direct the shell-side fluid back and forth across the tube bundle to provide effective velocity and heat transfer rates.

BACKGROUND ART/ PRIOR ART:

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.

There are two methods in existing practices. First, the drilling locations in the rings was done manual marking and drilling was done through conventional drilling. Second, a jig plate used for top and bottom sides frame ring drilling. In these methods, the mismatch was noticed while align the top frame ring w.r.t bottom frame ring and counter hole drilling in bottom ring is not concentric with centre hole.

OBJECTS OF INVENTION:

It is therefore an object of present invention for counter hole drilling in the ring assembly (Top frame ring & Bottom frame ring) at asymmetric locations in different pitch circle diameter can be done using this innovative jig plate.

Another object of the invention is to provide Drilling jig for frame ring assembly counter holes drilling, which obviates shortcomings of the prior art(s).

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 INVENTION:

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.

Any type of Steam Generators and Heat Exchangers contain a large shell and many tubes. A fluid stream passes through the tubes, and another stream passes through the shell to trade heat energy. The ring assembly (Top frame ring & Bottom frame ring) is used to hold the SS Grid flats between the ring assembly using weld pin which is called as Grid Assembly. The Grid assembly serves two important functions in any Steam Generator and Heat Exchanger. First, they support the tubes during assembly and operation and help prevent vibration from flow-induced eddies. Second, they direct the shell-side fluid back and forth across the tube bundle to provide effective velocity and heat transfer rates.

The counter hole drilling ring assembly (Top frame ring & Bottom frame ring) at asymmetric locations in different pitch circle diameter can be done using innovative jig plate. In this innovative jig plate, the concentric alignment of top frame ring with respect to bottom frame rings and complete arresting of all degree of freedom are done very easily which will facilitate the error free drilling and counter drilling in the ring assembly.

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.

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.

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:

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:-

Figure-01 shows: Isometric view of drill jig.
Figure-02 shows: Section A-A indicate top and bottom plate locking arrangement.
Figure-03 shows: Section B-B indicate counter hole drilling using bush in 1st pitch circle.
Figure-04 shows: Section B-B indicate hole drilling using bush in 2nd pitch circle and stopper pin.

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 INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS:

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.

The present invention makes a disclosure regarding an invention pertinent to Drilling jig for frame ring assembly counter holes drilling at asymmetric locations in different pitch circles.

Reference may be made to Fig.-01, wherein the total assembly of drill jig for frame ring assembly counter holes drilling at asymmetric locations in different pitch circles is shown in Isometric view.

The drill jig comprises of bottom jig plate [01], top jig plate [02], inner locking bolt [03], outer locking bolt [04], eye bolt [05], stopper pin [06], vent hole fixed bush [07], drain hole fixed bush [08], fixed bush [09], sliding bush [10], sliding bush locking screw [11], Bottom frame ring [12] and top frame ring [13].

The bottom drill jig plate [01] has a step to lock the bottom frame ring [12], holes in 1st pitch circle diameter to facilitate the drilling, drain hole fixed bush [08] and stopper pin [06]. The fixed bush [08] is provided for guiding the drill while performing the drilling operation and the stopper pin [06] is used to align the bottom frame ring [12] and top frame ring [13] in concentric while job setting and locking the frame rings to main.

Over this bottom drill jig plate [01], the top [13] and bottom frame rings [12] is placed between drill jig plates [01&02] with the help of locking bolts [03]. The ring locking bolts [03] are arranged in such a way that, inner locking bolts [03] are placed in 6 places at inner side of ring and outer locking bolts [04] are placed in 6 locations at outer side of frame ring (Figure-2: Section A-A). The counter hole drilling through bushes [09,10 & 11] details in 1st pitch circle diameter is shown in Figure-3: Section B-B.

The hole drilling through bush [07 & 08] details in 2nd pitch circle diameter and stopper pin [06] are shown in Figure-4: Section C-C. The stopper pins [06] are located at 120 degrees apart as shown in Figure-4: Section C-C. In this invention, the top & bottom frame ring hole and top frame ring counter hole drilling is done in 1st setting as shown in Figure-3: Section B-B. The bottom frame ring counter hole drilling is done in 2nd setting. The eye bolts [05] are provided at 4 places at 90 degree apart for handling the drill jig plates assembly (Figure-1: 3D View).

Drilling Jig for frame ring assembly counter holes drilling at asymmetric locations in different pitch circles for Steam Generator and Heat Exchanger comprising the steps of:

- Drill jig with provision for concentric alignment of top frame ring w.r.t bottom frame ring with the help of Stopper pins;
- Circular step in the top and bottom drill jig plates for frame rings locking;
- Provision for top and bottom frame rings locking between top and bottom drill jig plate as a single unit;
- Counter holes and holes drilling at asymmetric locations in different pitch circles.

ADVANTAGES OF INVENTION

The counter hole drilling ring assembly (Top frame ring & Bottom frame ring) at asymmetric locations in different pitch circle diameter can be done using innovative jig plate. In this innovative jig plate, the concentric alignment of top frame ring w.r.t bottom frame rings and complete arresting of all degree of freedom are done very easily which will facilitate the error free drilling and counter drilling in the ring assembly.

In this innovative jig plates (Top drill jig plate and bottom drill jig plate), the concentric alignment of top frame ring with respect to bottom rings can be done easily. Also, the complete counter drilling can be done as per the requirement. It is used in fabrication area for through and counter holes drilling in top and bottom frame ring of Grid assembly for Steam Generator and Heat Exchanger applications.

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.

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.

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”.

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.

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.

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.

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.
,CLAIMS:We Claim

1. Drill jig for frame ring assembly counter holes drilling at asymmetric locations in different pitch circles comprises of bottom jig plate [01], top jig plate [02], inner locking bolt [03], outer locking bolt [04], eye bolt [05], stopper pin [06], vent hole fixed bush [07], drain hole fixed bush [08], fixed bush [09], sliding bush [10], sliding bush locking screw [11], Bottom frame ring [12] and top frame ring [13], wherein
the bottom drill jig plate [01] has a step to lock the bottom frame ring [12], holes in 1st pitch circle diameter to facilitate the drilling, drain hole fixed bush [08] and stopper pin [06].

2. The drill jig as claimed in claim 1, wherein the fixed bush [08] is provided for guiding the drill while performing the drilling operation and the stopper pin [06] is used to align the bottom frame ring [12] and top frame ring [13] in concentric while job setting and locking the frame rings.

3. The drill jig as claimed in claim 1 or 2, wherein over the bottom drill jig plate [01], the top [13] and bottom frame rings [12] are placed between the drill jig plates [01&02] with the help of locking bolts [03].

4. The drill jig as claimed in claims 1-3, wherein the ring locking bolts [03] are arranged that, inner locking bolts [03] are placed in multiple places at inner side of ring and outer locking bolts [04] are placed in multiple locations at outer side of frame ring.

5. The drill jig as claimed in claims 1-4, wherein the stopper pins [06] are located at about 120 degrees apart, in which the top and bottom frame ring hole and top frame ring counter hole drilling is done in 1st setting, and the bottom frame ring counter hole drilling is done in 2nd setting.

6. The drill jig as claimed in claims 1-5, wherein the eye bolts [05] are provided at multiple places at about 90 degree apart for handling the drill jig plates assembly.