CN112833699A - Heat exchanger tube bundle tube plate interface welding process - Google Patents
Heat exchanger tube bundle tube plate interface welding process Download PDFInfo
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- CN112833699A CN112833699A CN202110096038.3A CN202110096038A CN112833699A CN 112833699 A CN112833699 A CN 112833699A CN 202110096038 A CN202110096038 A CN 202110096038A CN 112833699 A CN112833699 A CN 112833699A
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- rotating shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
- F28F9/10—Arrangements for sealing elements into header boxes or end plates by dismountable joints by screw-type connections, e.g. gland
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a welding process of a tube plate interface of a tube bundle of a heat exchanger, which comprises a welding tool, wherein the welding tool comprises a lower section, an upper section and a welding part; the lower section comprises a lower section pipe body and a guide pipe body; the guide pipe body is fixed at the center of the upper end of the lower section pipe body; the upper section comprises an upper section pipe body; the guide pipe body is inserted into the lower end of the upper section pipe body and is rotationally connected with the lower section; the upper section pipe body is provided with an upper section thread part; the welding part is connected to the upper section thread part through threads; the distance between the welding part and the position to be welded can be adjusted through the rotation of the welding part on the upper thread part. And the welding part is rotated to the position to be welded, and the position to be welded is welded by electrifying.
Description
Technical Field
The invention relates to the technical field of heat exchanger welding, in particular to a process for welding a tube plate interface of a heat exchanger tube bundle.
Background
The welding of the heat exchanger tube bundle and the interface of the tube plate is generally to insert the tube bundle into the hole of the tube plate and directly weld the interface by using a welding device. However, the welding process is purely problematic:
1. the wall thickness of the tube bundle is relatively thin, and the tube bundle is burnt out due to the fact that the welding height is too close;
2. the welding process is manual welding, so that unstable conditions exist, and partial poor welding is easily caused in the welding process.
Therefore, a heat exchanger tube bundle tube plate interface welding process is developed.
Disclosure of Invention
In order to solve the above problems, the present invention provides the following technical solutions:
a heat exchanger welding tool comprises a lower section, an upper section and a welding part; the lower section comprises a lower section pipe body and a guide pipe body; the guide pipe body is fixed at the center of the upper end of the lower section pipe body; the upper section comprises an upper section pipe body; the guide pipe body is inserted into the lower end of the upper section pipe body and is rotationally connected with the lower section; the upper section pipe body is provided with an upper section thread part; the welding part is connected to the upper section thread part through threads; the distance between the welding part and the position to be welded can be adjusted through the rotation of the welding part on the upper thread part.
Preferably, the weld comprises a position adjustment ring and a weld ring; an internal thread which is matched with the upper section of the thread part is arranged in the position adjusting ring; the lower end of the outer wall of the position adjusting ring is provided with a second bump; the welding ring comprises a second limiting groove and a welding head; the second limiting groove is matched with the lug in two directions to realize the rotary connection of the welding ring and the position adjusting ring; the welding head is arranged on the lower end face of the welding ring and is used for welding the area to be welded.
Preferably, the upper end of the lower section pipe body is rotatably connected with a lower section rotating shaft; the lower end of the upper-section pipe body is rotatably connected with an upper-section rotating shaft; a lower connecting rod is fixed on the lower section rotating shaft, and an upper connecting rod is fixed on the upper section rotating shaft; one end of the upper connecting rod, which is far away from the upper section rotating shaft, is rotatably connected with one end of the lower connecting rod, which is far away from the lower section rotating shaft, through a connecting rotating shaft; and a supporting plate is fixed on one side of the connecting rotating shaft, which is far away from the center of the welding tool.
Preferably, a movable groove allowing the lower rotating shaft to rotate for 90 degrees is formed in the position, located on the lower rotating shaft, of the lower pipe body; the upper section pipe body is provided with a movable groove which allows the upper section rotating shaft to rotate 90 degrees at the position of the upper section rotating shaft.
Preferably, the outer part of the supporting plate is an arc surface; an elastic buffer block is arranged at the cambered surface of the supporting plate; the cambered surface through the backup pad and the structure of elastic buffer block can let the backup pad support when the tube bank is inside, and the welding frock can be more firm.
Preferably, the lower end of the upper section is provided with a cavity for accommodating the guide pipe body; the upper section also comprises a rotating pipe, a handle and an insert; the insert is fixedly arranged at the upper end of the cavity, and the rotating pipe is in threaded connection with the insert; the upper end of the rotating pipe is provided with a handle; the lower end of the rotating pipe is rotatably connected with the guide pipe body.
Preferably, the lower end of the rotating pipe is provided with a first projection; the upper end of the guide pipe body is provided with a first limiting groove; one lug is rotatably connected with the first limiting groove; a ball is arranged inside the first limiting groove; the ball is positioned in the clearance between the first limiting groove and the first bump.
Preferably, the lower section further comprises a lower section support portion; the outer surface of the lower section supporting part is provided with a soft supporting body.
Preferably, the soft support body is one or a combination of several of a rubber ring, an air cushion and resin; the outer surface of the flexible support body is in a circular arc shape.
A heat exchanger tube bundle tube plate interface welding process comprises the following steps:
s1, inserting the tube bundle into the welding hole of the tube plate;
s2, inserting the lower section of the welding tool into the tube bundle, stopping the insertion of the welding tool when the upper end of the upper section basically enters the tube bundle, and inserting the lower section supporting part into the tube bundle to realize primary positioning;
s3, rotating the handle to drive the rotating tube to rotate upwards, wherein the upper tube body can move towards the lower section along the guide tube body through the rotating connection relationship between the rotating tube and the guide tube body, and at the moment, due to the connection relationship between the lower rotating shaft, the lower connecting rod, the connecting rotating shaft, the upper connecting rod, the upper rotating shaft and the support plate, the support plate is pushed outwards and supported in the tube bundle to realize the positioning of the welding tool;
s4, rotating the position adjusting ring to drive the welding part to move to the interface part of the tube bundle and the tube plate, electrifying the butt joint to realize the welding of the tube bundle and the tube plate, rotating the welding ring to ensure that the welding head is at a constant height relative to the structure part and ensure the welding uniformity.
Compared with the prior art, the invention has the beneficial effects that:
1. the welding frock of setting, be provided with the weld part on the welding frock, the weld part passes through threaded connection on upper segment body, with threaded connection's mode, can effectual regulation weld part to treat the height in weld zone territory, just so can ensure welded height, the welding ring passes through lug two and spacing groove two rotation connection with the position adjusting ring simultaneously, the welding height is confirmed the back, only need rotate the soldered connection of welding ring lower part to required welded position, just can be to treating the weld zone territory and weld, and whole rotation process soldered connection is unanimous with the height of treating the weld zone territory, more can improve welded homogeneity and stability.
2. The lower section of the welding tool is provided with a lower section supporting part, after the lower section supporting part is inserted into the tube bundle, the soft supporting body on the surface of the lower section supporting part can be pressed on the inner wall of the tube bundle, so that the welding tool realizes primary positioning, and meanwhile, the soft supporting body is made of rubber, resin, air cushion and other materials, so that the materials can be slightly deformed after the lower section supporting part is inserted into the tube bundle, the supporting force in the tube bundle is improved, and pre-positioning is more stable; in addition, the outer surface of the soft support body is arc-shaped, and when the soft support body needs to be taken out, the welding tool can be separated from the tube bundle only by slowly rotating the welding tool and applying force outwards lightly.
3. Rotatory handle, it upwards rotates to drive the rotating tube, through the rotation relation of connecting of rotating tube and direction body, upper segment pipe body can be along the motion of this hypomere of direction body, this moment because the hypomere axis of rotation, lower connecting rod, connect the pivot, go up the connecting rod, the relation of connection of upper segment axis of rotation and backup pad, the backup pad is outwards released, and support in the tube bank, the backup pad is provided with the multiunit, the outside of backup pad is arc and tube bank inner wall to matching, also can give welding frock correction power through the support of multiunit backup pad in the tube bank, let welding frock be the vertical state for the tube sheet after the assembly finishes, can let like this in follow-up welding process, welding position is more stable.
4. The rotating pipe is rotatably connected with the guide pipe body through the first bump and the first limiting groove, and the ball is arranged in the gap area between the first bump and the first limiting groove, so that the rotating process of the rotating pipe relative to the guide pipe body is smoother.
5. The welding part is connected to the upper section pipe body through threads, the welding part can be screwed out, and the welding part can be replaced.
Drawings
FIG. 1 is a schematic view of a tube sheet and a tube bundle of a heat exchanger.
Fig. 2 is a structural view of a welding tool.
Fig. 3 is an enlarged view of a portion a.
Fig. 4 is a cross-sectional view of a welding portion of the welding tool.
Fig. 5 is an enlarged view of the portion B.
FIG. 6 is a first cross-sectional view of the upper section of the welding tool.
FIG. 7 is a second cross-sectional view of the upper section of the welding tool.
Fig. 8 is an enlarged view of the portion C.
In the figure: 1. a tube sheet; 2. a tube bundle; 3. welding a tool; 31. a lower section; 311. a lower tube body; 3111. a lower section rotating shaft; 3112. a support plate; 3113. a lower connecting rod; 3114. connecting the rotating shaft; 3115. an upper connecting rod; 312. a lower section support section; 3121. a flexible support; 313. a guide pipe body; 3131. a first limiting groove; 3132. a ball bearing; 32. an upper section; 321. an upper section pipe body; 3211. an upper section rotating shaft; 3212. an upper threaded portion; 322 rotating the tube; 3221. a first bump; 323. a handle; 324. an insert; 33. welding the part; 331. a position adjustment ring; 3311. a second bump; 332. welding a ring; 3321. a second limiting groove; 3322. and (5) welding a head.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A heat exchanger welding tool comprises a lower section 31, an upper section 32 and a welding part 33; the lower section 31 includes a lower tube 311 and a guide tube 313; the guide tube body 313 is fixed at the center of the upper end of the lower tube body 311; the upper section 32 includes an upper section pipe 321; the guide tube body 313 is inserted into the lower end of the upper tube 321 and is rotatably connected to the lower segment 32; the upper section pipe body 321 is provided with an upper section thread part 3212; the welding portion 33 is screwed to the upper threaded portion 3212; by the rotation of the welding portion 33 at the upper-stage threaded portion 3212, the distance between the welding portion 33 and the position to be welded can be adjusted. And the welding part is rotated to the position to be welded, and the position to be welded is welded by electrifying.
The weld 33 includes a position adjustment ring 331 and a weld ring 332; an internal thread matched with the upper-section thread part 3212 is arranged inside the position adjusting ring 331; the lower end of the outer wall of the position adjusting ring 331 is provided with a second projection 3311; the welding ring 332 comprises a second limiting groove 3321 and a welding head 3322; the second limit groove 3321 is matched with the second projection 3311 in direction, so that the welding ring 332 is rotatably connected with the position adjusting ring 331; a welding head 3322 is provided on the lower end surface of the welding ring 332, and the region to be welded is welded by the welding head 3322. The welding part 33 which is matched with the area to be welded is selected, the welding part 33 rotates to the area to be welded through the threaded connection relation with the upper-section pipe body 32, the height of the welding head 3322 relative to the area to be welded can be better controlled, and all welding positions are located at the same height through rotating the welding ring 332.
The upper end of the lower tube body 311 is rotatably connected with a lower rotating shaft 3111; the lower end of the upper pipe 321 is rotatably connected with an upper rotating shaft 3211; a lower connecting rod 3113 is fixed on the lower section rotating shaft 3111, and an upper connecting rod 3115 is fixed on the upper section rotating shaft 3211; one end of the upper connecting rod 3115, which is far away from the upper section rotating shaft 3211, is rotatably connected with one end of the lower connecting rod 3113, which is far away from the lower section rotating shaft 3111, through a connecting shaft 3114; a support plate 3112 is fixed on one side of the connecting shaft 3114 away from the center of the welding fixture 3.
A movable groove for allowing the lower rotating shaft 3111 to rotate 90 ° is formed in the lower tube body 311 at the lower rotating shaft 3111; the upper tube 321 is provided with a movable groove at the position of the upper rotating shaft 3211 to allow the upper rotating shaft 321190 ° to rotate.
The outer part of the support plate 3112 is a cambered surface; an elastic buffer block is arranged at the cambered surface of the supporting plate 3112; the cambered surface through backup pad 3112 and elastic buffer block's structure can let backup pad 3112 support when 1 is inside in the tube bank, and welding frock 3 can be more firm. Due to the connection relationship of the lower section rotating shaft 3111, the lower connecting rod 3113, the connecting rotating shaft 3114, the upper connecting rod 3115, the upper section rotating shaft 3211 and the supporting plate 3112, the supporting plate 3112 is pushed outwards and supported in the tube bundle 2, the supporting plate 3112 is provided with a plurality of groups, the outer part of the supporting plate is in a circular arc shape and is matched with the inner wall of the tube bundle 2, the welding tool 3 can be provided with a correcting force through the support of the plurality of groups of supporting plates 3112 in the tube bundle 2, the welding tool 3 is in a vertical state relative to the tube plate 1 after the assembly is finished, and therefore, the welding position can be more stable in the
The lower end of the upper section 32 is provided with a cavity for accommodating the guide pipe body 313; the upper section 32 further comprises a rotating tube 322, a handle 323 and an insert 324; the insert 324 is fixedly arranged at the upper end of the cavity, and the rotating pipe 322 is in threaded connection with the insert 324; the upper end of the rotating pipe 322 is provided with a handle 323; the lower end of the rotating tube 322 is rotatably connected to the guide tube body 313. The lower end of the rotating pipe 322 is provided with a first projection 3221; the upper end of the guide pipe body 313 is provided with a first limiting groove 3131; the first bump 3221 is rotatably connected with the first limit groove 3131; a ball 3132 is arranged inside the first limiting groove 3131; the ball 3132 is located in the gap between the first limiting groove 3131 and the first bump 3221. This allows the rotation of the rotating pipe 322 with respect to the guide pipe body 313 to be performed more smoothly.
The lower section 31 further comprises a lower section support 312; the outer surface of the lower support portion 312 is provided with a soft support 3121. The flexible support 3121 is one or more of rubber ring, air cushion, and resin; the outer surface of the flexible support 3121 is circular arc. The lower section of the welding tool 3 is provided with a lower section supporting part 312, after the lower section supporting part 312 is inserted into the tube bundle 2, the soft supporting body 3121 on the surface of the welding tool is pressed on the inner wall of the tube bundle 2, so that the welding tool 3 realizes primary positioning, and meanwhile, the soft supporting body 3121 is made of materials such as rubber, resin, air cushion and the like, and the materials can slightly deform after the lower section supporting part 312 is inserted into the tube bundle, so that the supporting force in the tube bundle 2 is improved, and the pre-positioning is more stable; in addition, the outer surface of the flexible support body 3121 is arc-shaped, and when the welding tool 3 needs to be taken out, the welding tool 3 can be separated from the tube bundle 2 only by slowly rotating the welding tool and slightly applying force outwards.
A heat exchanger tube bundle tube plate interface welding process comprises the following steps:
s1, inserting the tube bundle 2 into the welding hole of the tube plate 1;
s2, inserting the lower section 31 of the welding tool 3 into the tube bundle 2, stopping inserting the welding tool when the upper end of the upper section 32 basically enters the tube bundle 2, and inserting the lower section supporting part 312 into the tube bundle 2 to realize primary positioning;
s3, rotating the handle 323 to drive the rotating tube 322 to rotate upward, and through the rotational connection relationship between the rotating tube 322 and the guiding tube 313, the upper tube 321 will move toward the lower segment 31 along the guiding tube 313, and at this time, due to the connection relationship between the lower rotating shaft 3111, the lower connecting rod 3113, the connecting shaft 3114, the upper connecting rod 3115, the upper rotating shaft 3211 and the supporting plate 3112, the supporting plate 3112 is pushed outward and supported in the tube bundle 2 to realize the positioning of the welding fixture 3;
s4, rotating the position adjusting ring 331 to drive the welding part 33 to move to the interface part of the tube bundle 2 and the tube plate 1, the welding height is stabilized at 3-8mm, the welding joint 3322 is electrified to realize the welding of the tube bundle 2 and the tube plate 1, the welding ring 332 is rotated to ensure that the welding joint 3322 is at a constant height relative to the structural part, and the welding uniformity is ensured.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a heat exchanger welding frock which characterized in that:
comprises a lower section (31), an upper section (32) and a welding part (33);
the lower section (31) comprises a lower section pipe body (311) and a guide pipe body (313);
the guide pipe body (313) is fixed at the center of the upper end of the lower section pipe body (311);
the upper section (32) comprises an upper section pipe body (321);
the guide pipe body (313) is inserted into the lower end of the upper section pipe body (321) and is rotationally connected with the lower section (32);
an upper-section threaded part (3212) is arranged on the upper-section pipe body (321);
the welding part (33) is connected to the upper-stage thread part (3212) through threads;
the distance between the welding part (33) and the position to be welded can be adjusted by rotating the welding part (33) on the upper-stage thread part (3212).
2. The heat exchanger welding tool of claim 1, characterized in that:
the welding part (33) comprises a position adjusting ring (331) and a welding ring (332);
an internal thread matched with the upper-section thread part (3212) is arranged inside the position adjusting ring (331);
a second bump (3311) is arranged at the lower end of the outer wall of the position adjusting ring (331);
the welding ring (332) comprises a second limiting groove (3321) and a welding head (3322);
the second limiting groove (3321) is matched with the second projection (3311) in direction to realize the rotary connection of the welding ring (332) and the position adjusting ring (331);
a welding head (3322) is provided on the lower end surface of the welding ring (332), and the region to be welded is welded by the welding head (3322).
3. The heat exchanger welding tool of claim 1, characterized in that:
the upper end of the lower pipe body (311) is rotatably connected with a lower rotating shaft (3111);
the lower end of the upper-section pipe body (321) is rotatably connected with an upper-section rotating shaft (3211);
a lower connecting rod (3113) is fixed on the lower section rotating shaft (3111), and an upper connecting rod (3115) is fixed on the upper section rotating shaft (3211);
one end of the upper connecting rod (3115) far away from the upper section rotating shaft (3211) is rotatably connected with one end of the lower connecting rod (3113) far away from the lower section rotating shaft (3111) through a connecting rotating shaft (3114);
one side of the connecting rotating shaft (3114) far away from the center of the welding tool (3) is fixed with a supporting plate (3112).
4. The heat exchanger welding tool of claim 3, wherein:
the lower pipe body (311) is provided with a movable groove which is positioned at the lower rotating shaft (3111) and allows the lower rotating shaft (3111) to rotate for 90 degrees;
the upper section pipe body (321) is provided with a movable groove which is positioned at the upper section rotating shaft (3211) and allows the upper section rotating shaft (3211) to rotate for 90 degrees.
5. The heat exchanger welding tool of claim 3, wherein:
the outer part of the supporting plate (3112) is a cambered surface;
an elastic buffer block is arranged at the cambered surface position of the support plate (3112);
the cambered surface through backup pad (3112) and the structure of elastic buffer block can let backup pad (3112) support when tube bank (1) is inside, and welding frock (3) can be more firm.
6. The heat exchanger welding tool of claim 1, characterized in that:
the lower end of the upper section (32) is provided with a cavity which is used for accommodating the guide pipe body (313);
the upper section (32) also comprises a rotating pipe (322), a handle (323) and an insert (324);
the insert (324) is fixedly arranged at the upper end of the cavity, and the rotating pipe (322) is in threaded connection with the insert (324);
the upper end of the rotating pipe (322) is provided with a handle (323);
the lower end of the rotating tube (322) is rotatably connected with the guide tube body (313).
7. The heat exchanger welding tool of claim 6, wherein:
the lower end of the rotating pipe (322) is provided with a first bump (3221);
the upper end of the guide pipe body (313) is provided with a first limiting groove (3131);
the first bump (3221) is rotatably connected with the first limit groove (3131);
a ball (3132) is arranged inside the first limiting groove (3131);
the ball (3132) is located in the gap between the first limiting groove (3131) and the first bump (3221).
8. The heat exchanger welding tool of claim 1, characterized in that:
the lower section (31) further comprises a lower section support section (312);
the outer surface of the lower section supporting part (312) is provided with a soft supporting body (3121).
9. The heat exchanger welding tool of claim 8, wherein:
the soft support body (3121) is one or a combination of several of a rubber ring, an air cushion and resin;
the outer surface of the flexible support body (3121) is arc-shaped.
10. A heat exchanger tube bundle tube plate interface welding process is characterized by comprising the following steps:
s1, inserting the tube bundle (2) into the welding hole of the tube plate (1);
s2, inserting the lower section (31) of the welding tool (3) into the tube bundle (2), stopping the insertion of the welding tool when the upper end of the upper section (32) basically enters the tube bundle (2), and inserting the lower section supporting part (312) into the tube bundle (2) to realize primary positioning;
s3, a rotating handle (323) drives a rotating pipe (322) to rotate upwards, through the rotating connection relation between the rotating pipe (322) and a guide pipe body (313), an upper section pipe body (321) can move towards the lower section (31) along the guide pipe body (313), and at the moment, due to the connection relation between a lower section rotating shaft (3111), a lower connecting rod (3113), a connecting rotating shaft (3114), an upper connecting rod (3115), an upper section rotating shaft (3211) and a supporting plate (3112), the supporting plate (3112) is pushed outwards and supported in a pipe bundle (2) to realize the positioning of the welding tool (3);
s4, rotating the position adjusting ring (331), driving the welding part (33) to move to the interface position of the tube bundle (2) and the tube plate (1), electrifying the welding joint (3322), realizing the welding of the tube bundle (2) and the tube plate (1), rotating the welding ring (332), ensuring that the welding joint (3322) is at a constant height relative to the structural position, and ensuring the welding uniformity.
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| CN202110096038.3A CN112833699B (en) | 2021-01-25 | 2021-01-25 | Heat exchanger welding tool and heat exchanger tube bundle tube plate interface welding process |
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| CN202110096038.3A CN112833699B (en) | 2021-01-25 | 2021-01-25 | Heat exchanger welding tool and heat exchanger tube bundle tube plate interface welding process |
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| CN112833699B CN112833699B (en) | 2022-07-12 |
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