CN218903949U

CN218903949U - Manual argon tungsten-arc welding auxiliary device for welding seam of tube head of tube plate of heat exchanger

Info

Publication number: CN218903949U
Application number: CN202223439519.9U
Authority: CN
Inventors: 陈杰恒; 何仲; 喜鑫; 陈益希; 孔令宗; 朱福生
Original assignee: Jiangsu Libert Inc
Current assignee: Jiangsu Libert Inc
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-04-25
Anticipated expiration: 2032-12-20

Abstract

The utility model discloses a manual tungsten electrode argon arc welding auxiliary device for a tube head weld joint of a tube plate of a heat exchanger, which comprises an insertion tube, wherein a fixed screw sleeve is fixed in the insertion tube, radial mounting holes are formed in the fixed screw sleeve, a radial tension rod is slidably arranged in each radial mounting hole, a radial through hole is formed in the insertion tube, an adjusting screw is concentrically arranged in the insertion tube, the adjusting screw is in threaded connection with the fixed screw sleeve, a driving ring groove is formed in the adjusting screw, a compression spring is arranged in the radial mounting hole, the elastic force of the compression spring forces the radial tension rod to slide inwards, a rotating sleeve capable of rotating around the adjusting screw is sleeved at the other end of the adjusting screw, and an insertion sleeve which is convenient for inserting a manual tungsten electrode argon arc welding torch is arranged on the rotating sleeve. The auxiliary device can facilitate manual argon tungsten-arc welding operation and improve welding quality.

Description

Manual argon tungsten-arc welding auxiliary device for welding seam of tube head of tube plate of heat exchanger

Technical Field

The utility model relates to the technical field of welding assistance, in particular to a manual argon tungsten-arc welding assistance device for welding seams of tube heads of tube plates of heat exchangers.

Background

The structure of the tubular heat exchanger comprises a heat exchange tube and tube plates positioned at two ends of the heat exchange tube, wherein a plurality of jacks are arranged on the tube plates, the heat exchange tube is inserted into the jacks to be welded, the end face of the jacks is cut into grooves during welding, the existing welding mode is that an argon arc welding torch is manually operated to form welding seams along the grooves during welding through manual argon tungsten-arc welding, and the welding operation skills of workers are relatively high due to the manual operation, and the defects of incomplete welding of the root part of a welding seam deposited metal groove, incomplete welding of the inner wall of the heat exchange tube, incomplete fusion of the groove face and the like are caused by incorrect arc length and arc angle; the heat exchange tube has small tube diameter, and when the girth weld is welded, the position of the welding torch is continuously changed, so that the girth weld is out of round in appearance, attractive in appearance and unstable in welding quality.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: the auxiliary device can stabilize the electric arc length and set the running track of the girth welding torch, is convenient for manual argon tungsten-arc welding operation and improves the quality of product welding seams.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a manual tungsten electrode argon arc welding auxiliary device of heat exchanger tube sheet tube head welding seam, includes the insert tube, be fixed with two at least fixed swivel nut in the insert tube, be provided with three radial mounting hole on every fixed swivel nut, radial slidable mounting has radial tension pole in every radial mounting hole, be provided with the radial through-hole with radial tension pole one-to-one on the insert tube, be equipped with adjusting screw in the insert tube with threaded connection between the fixed swivel nut, be provided with on the adjusting screw with radial tension pole inboard end contact corresponding drive ring groove, be provided with on the drive ring groove the drive radial tension pole outside gliding drive inclined plane, install compression spring in the radial mounting hole, this compression spring's elasticity forces radial tension pole inwards slides, the other end cover of adjusting screw has the rotatable cover of winding adjusting screw rotatory, be provided with the convenient manual tungsten electrode argon arc inserted insert cover on the rotatable cover.

As a preferable scheme, the adjusting screw is further provided with a locking screw sleeve in a threaded manner, one end of the locking screw sleeve is in contact fit with the end part of the fixing screw sleeve closest to the locking screw sleeve, and the rotating sleeve is arranged on the outer side of the locking screw sleeve.

As a preferable scheme, the rotating sleeve comprises an inner sleeve body and an outer sleeve body, wherein the inner sleeve body is sleeved on the adjusting screw in a sliding manner, the outer sleeve body is arranged on the outer thread of the inner sleeve body, and the inserting sleeve is arranged on the inner sleeve body.

As a preferred embodiment, the insertion sleeve is connected to the inner sleeve body by a radial adjustment mechanism.

As a preferable scheme, the radial adjusting mechanism comprises a mounting column and a connecting column, wherein the mounting column is arranged on the inner sleeve body, the connecting column is connected with the insertion sleeve, a connecting screw sleeve is rotatably arranged on the connecting column, a threaded section is arranged on the mounting column, and the connecting screw sleeve is in threaded connection with the threaded section.

As a preferred embodiment, the connecting screw sleeve is connected to the insertion sleeve by means of a universal ball structure.

As a preferable scheme, both ends of the radial tensioning rod are spherical ends.

As a preferable scheme, a bolt is arranged on the radial tension rod, and the compression spring is preloaded between the insertion tube and the bolt.

As a preferable scheme, the driving ring groove is a ring groove with a trapezoid cross section.

After the technical scheme is adopted, the utility model has the following effects: because the manual tungsten electrode argon arc welding auxiliary device of heat exchanger tube sheet tube head welding seam, including the insert tube, be fixed with two at least fixed swivel nut in the insert tube, be provided with three radial mounting hole on every fixed swivel nut, radial slidable mounting has radial tension rod in every radial mounting hole, be provided with the radial through-hole with radial tension rod one-to-one on the insert tube, install adjusting screw in the insert tube with one by one, this adjusting screw with threaded connection between the fixed swivel nut, adjusting screw is provided with the drive ring groove that contacts with radial tension rod inboard end and corresponds, be provided with on the drive ring groove and drive radial tension rod outwards gliding drive inclined plane, install compression spring in the radial mounting hole, this compression spring's elasticity forces radial tension rod inwards slides, the other end cover of adjusting screw has the rotatable cover of winding adjusting screw, be provided with the convenient manual tungsten electrode argon arc inserted insert sleeve on the cover, consequently, can be with the insert tube in the heat exchange tube, then screw axial displacement and the drive inclined plane that makes radial tension rod outwards slide with radial tension rod's the central tube, can be unified because the drive inclined plane of the concentric with the radial tension rod of the drive ring groove of the heat exchanger tube is inserted to the central tube.

And as the adjusting screw is also provided with the locking screw sleeve in a threaded manner, one end of the locking screw sleeve is in contact fit with the end part of the fixed screw sleeve closest to the locking screw sleeve, and the rotating sleeve is arranged on the outer side of the locking screw sleeve. Therefore, the adjusting screw can be further locked through the locking screw sleeve, the adjusting screw is conveniently locked after the radial tension rod is tightly supported by the inserting tube, looseness is avoided, the stability of the center positioning precision of the heat exchange tube is ensured, and the stability of the radius precision of the circular weld track is essentially ensured. After the tungsten electrode argon arc welding torch is inserted into the insertion sleeve by a worker, the tungsten electrode argon arc welding torch can rotate around the adjusting screw rod by rotating the sleeve, and the tungsten electrode argon arc welding torch moves according to a set girth weld track, so that the roundness of the girth weld can be ensured, and the stability of the quality of the welding seam of a product is improved.

The rotating sleeve comprises an inner sleeve body and an outer sleeve body, the inner sleeve body is sleeved on the adjusting screw in a sliding manner, the outer sleeve body is arranged on the outer sleeve body in a threaded manner, the position of the inner sleeve body can be adjusted by utilizing the threaded connection relation between the outer sleeve body and the inner sleeve body, and the position of the inserting sleeve can be adjusted, so that the distance between a tungsten wire and a groove of the argon tungsten-arc welding torch can be conveniently adjusted, the electric arc length is stabilized, the voltage value is stabilized, and the condition is created for uniformity of power supply heat input.

The radial position of the insert sleeve can be better adjusted by the radial adjusting mechanism, the radial position between the tungsten electrode and the groove surface is further adjusted, the accuracy of the track radius of the girth weld is essentially guaranteed, the weld deposited metal is guaranteed to be positioned at the most proper position between the tube plate and the outer wall of the heat exchange tube, meanwhile, the roundness forming and the attractive appearance of the girth weld are guaranteed, and the connecting screw sleeve is connected with the insert sleeve through the universal ball structure.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a cross-sectional view of a construction of an embodiment of the present utility model;

FIG. 2 isbase:Sub>A cross-sectional view of FIG. 1 at A-A;

FIG. 3 is an enlarged schematic view of FIG. 1 at B;

FIG. 4 is a schematic view of the mounting structure of the insert sleeve and the rotating sleeve;

in the accompanying drawings: 1. a tube sheet; 2. a heat exchange tube; 3. an insertion tube; 4. fixing the screw sleeve; 5. a radial mounting hole; 6. a compression spring; 7. a radial tension rod; 8. adjusting a screw; 9. driving the ring groove; 10. a driving inclined plane; 11. a locking screw sleeve; 12. manual argon tungsten-arc welding torch; 13. an insertion sleeve; 14. a universal ball structure; 15. a jacket body; 16. an inner sleeve body; 17. a mounting column; 18. connecting a screw sleeve; 19. a connecting column; 20. a housing; 21. a plug pin; 22. radial through holes.

Detailed Description

The present utility model will be described in further detail with reference to the following examples.

As shown in fig. 1 to 4, the auxiliary device for manual tungsten electrode argon arc welding of a tube head weld joint of a tube plate of a heat exchanger comprises an insertion tube 3, at least two fixing threaded sleeves 4 are fixed in the insertion tube 3, two preferred fixing threaded sleeves 4 are arranged on each fixing threaded sleeve 4, three radial mounting holes 5 are arranged on each fixing threaded sleeve 4, the number of the radial mounting holes 5 on each fixing threaded sleeve 4 is three and distributed circumferentially, radial tension rods 7 are radially and slidably arranged in each radial mounting hole 5, radial through holes 22 which are in one-to-one correspondence with the radial tension rods 7 are arranged on the insertion tube 3, an adjusting screw 8 is concentrically arranged in the insertion tube 3 and in threaded connection with the fixing threaded sleeves 4, a driving ring groove 9 which is in contact with the inner side end of each radial tension rod 7 is arranged on the adjusting screw 8, a driving inclined surface 10 which drives the radial tension rods 7 to slide outwards is arranged on the driving ring groove 9, a compression spring 6 is arranged in the radial mounting holes 5, the radial tension rods 7 are radially and slidably arranged in the radial mounting holes 6, an adjusting screw 8 is concentrically arranged in the insertion tube 3, and the other adjusting screw 8 is rotatably connected with the adjusting screw 12, and the other adjusting screw is rotatably arranged on the tungsten electrode sleeve.

In this embodiment, both ends of the radial tension rod 7 are spherical ends. The radial tension rod 7 is provided with the bolt 21, the compression spring 6 is preloaded between the insertion tube 3 and the bolt 21, the compression spring 6 can be a cylindrical spring or a tower spring, the driving ring groove 9 is a ring groove with a trapezoid cross section, therefore, one waist of the trapezoid ring groove is the driving inclined surface 10, when the adjusting screw 8 moves axially, the driving inclined surface 10 gradually contacts with the inner side end of the radial tension rod 7, so that the radial tension rod 7 is pushed to slide outwards, the outer side end of the radial tension rod 7 is exposed from a radial through hole 22 on the insertion tube 3, the whole insertion tube 3 is fixed inside the heat exchange tube 2, and the adjusting screw 8, the insertion tube 3 and the heat exchange tube 2 are concentric due to synchronous action of the radial tension rod 7, the manual argon tungsten arc welding torch 12 is directly inserted into the insertion sleeve 13, the rotation sleeve can rotate around the adjusting screw 8, the welding groove on the tube plate 1 can be accurately welded, the welding quality is better controlled by the manual argon tungsten arc 12, and the welded weld joint is more circular after the welding.

And as shown in fig. 1 and 4, the adjusting screw 8 is further provided with a locking screw sleeve 11 in a threaded manner, one end of the locking screw sleeve 11 is in contact fit with the end part of the fixing screw sleeve 4 closest to the locking screw sleeve 11, the rotating sleeve is arranged on the outer side of the locking screw sleeve 11, and when the position of the adjusting screw 8 is adjusted in place, the adjusting screw 8 can be further locked by the locking screw sleeve 11, so that the radial tensioning rod 7 is prevented from sliding inwards to loosen due to axial movement.

In this embodiment, the rotating sleeve includes an inner sleeve 16 and an outer sleeve 15, the inner sleeve 16 is slidably sleeved on the adjusting screw 8, the outer sleeve 15 is mounted on an external thread of the inner sleeve 16, and the insert sleeve 13 is disposed on the inner sleeve 16, so that the position between the inner sleeve 16 and the outer sleeve 15 can be changed by rotating the outer sleeve 15, that is, the length of the rotating sleeve is changed, the distance between the insert sleeve 13 and the locking screw 11 can be changed by changing the length of the rotating sleeve, and then the axial position of the manual tungsten argon arc welding torch 12 is changed, thereby facilitating better welding.

The insertion sleeve 13 is connected with the inner sleeve 16 through a radial adjusting mechanism. The radial adjusting mechanism comprises a mounting column 17 and a connecting column 19, wherein the mounting column 17 is arranged on the inner sleeve body 16, the connecting column 19 is connected with the insertion sleeve 13, a connecting screw sleeve 18 is rotatably arranged on the connecting column 19, a threaded section is arranged on the mounting column 17, and the connecting screw sleeve 18 is in threaded connection with the threaded section. Thus, when the connecting screw sleeve 18 is rotated, the distance between the inserting sleeve 13 and the mounting column 17 can be changed, and the radial position of the inserting sleeve 13 can be adjusted, so that the radial position of the tungsten needle of the manual argon tungsten-arc welding torch 12 is ensured to be aligned with the root of the groove.

In this embodiment, the connecting screw sleeve 18 is connected to the insert sleeve 13 through the universal ball structure 14. Thus, after the manual argon tungsten-arc welding torch 12 is inserted into the insertion sleeve 13, the welding torch can swing through the universal ball structure 14, so that the welding angle can be conveniently controlled.

And the manual argon tungsten-arc welding torch 12 can be provided with a cover shell 20 for protecting the groove, so that the scheme is protected.

The above examples are merely illustrative of the preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model, and various modifications and adaptations of the technical solution of the present utility model should and are intended to fall within the scope of the present utility model as defined in the claims.

Claims

1. A manual argon tungsten-arc welding auxiliary device for welding seams of tube heads of tube plates of heat exchangers is characterized in that: the device comprises an insertion tube, wherein at least two fixing threaded sleeves are fixed in the insertion tube, three radial mounting holes are formed in each fixing threaded sleeve, radial tensioning rods are radially and slidably mounted in each radial mounting hole, radial through holes corresponding to the radial tensioning rods one by one are formed in the insertion tube, adjusting screws are concentrically mounted in the insertion tube, the adjusting screws are in threaded connection with the fixing threaded sleeves, driving annular grooves corresponding to the inner ends of the radial tensioning rods are arranged on the adjusting screws, driving inclined planes for driving the radial tensioning rods to slide outwards are arranged on the driving annular grooves, compression springs are mounted in the radial mounting holes, the elastic force of the compression springs forces the radial tensioning rods to slide inwards, rotating sleeves capable of rotating around the adjusting screws are sleeved at the other ends of the adjusting screws, and inserting sleeves convenient for inserting tungsten electrode argon arc welding torches are arranged on the rotating sleeves.

2. The auxiliary device for manual argon tungsten-arc welding of a tube head weld joint of a tube plate of a heat exchanger as claimed in claim 1, wherein: the adjusting screw is further provided with a locking screw sleeve in a threaded manner, one end of the locking screw sleeve is in contact fit with the end part of the fixing screw sleeve closest to the locking screw sleeve, and the rotating sleeve is arranged on the outer side of the locking screw sleeve.

3. The auxiliary device for manual argon tungsten-arc welding of a tube head weld joint of a tube plate of a heat exchanger as claimed in claim 2, wherein: the rotary sleeve comprises an inner sleeve body and an outer sleeve body, the inner sleeve body is sleeved on the adjusting screw in a sliding mode, the outer sleeve body is mounted on the outer threads of the inner sleeve body, and the insertion sleeve is arranged on the inner sleeve body.

4. A manual argon tungsten-arc welding auxiliary device for welding a tube head weld joint of a tube plate of a heat exchanger as claimed in claim 3, wherein: the insertion sleeve is connected with the inner sleeve body through a radial adjusting mechanism.

5. The auxiliary device for manual argon tungsten-arc welding of the tube head weld joint of the tube plate of the heat exchanger as claimed in claim 4, wherein: the radial adjusting mechanism comprises a mounting column and a connecting column, wherein the mounting column is arranged on the inner sleeve body, the connecting column is connected with the insertion sleeve, a connecting screw sleeve is rotatably arranged on the connecting column, a threaded section is arranged on the mounting column, and the connecting screw sleeve is in threaded connection with the threaded section.

6. The auxiliary device for manual argon tungsten-arc welding of the tube head weld joint of the tube plate of the heat exchanger as claimed in claim 5, wherein: the connecting screw sleeve is connected with the insertion sleeve through the universal ball structure.

7. The auxiliary device for manual argon tungsten-arc welding of the tube head weld joint of the tube plate of the heat exchanger as set forth in claim 6, wherein: both ends of the radial tension rod are spherical ends.

8. The auxiliary device for manual argon tungsten-arc welding of a tube head weld joint of a tube plate of a heat exchanger as set forth in claim 7, wherein: the radial tension rod is provided with a bolt, and the compression spring is preloaded between the insertion tube and the bolt.

9. The auxiliary device for manual argon tungsten-arc welding of a tube head weld joint of a tube plate of a heat exchanger as claimed in claim 8, wherein: the driving ring groove is a ring groove with a trapezoid cross section.