CN220093339U - Novel welder of slot deep hole welding - Google Patents

Abstract

The utility model discloses a novel welding gun for deep hole welding of an elongated hole, which is used for welding a heat exchange tube to an inner hole of a tube plate of a heat exchanger. The welding torch head and the positioning assembly are moved to reach the welding seam for welding, and the welding torch does not need to be provided with a wire feeding mechanism, and meanwhile, the welding torch head and the positioning assembly are movable, so that the welding torch can be suitable for welding tube plates with different thicknesses and heat exchange tubes with different specifications.

Description

Novel welder of slot deep hole welding

Technical Field

The utility model belongs to the field of heat exchanger welding, and particularly provides a novel welding gun for deep hole welding of an elongated hole.

Background

The heat exchanger has wide application in the industries of chemical industry, electric power, food and the like, and along with the development of the industries of chemical industry, electric power, food and the like, the heat exchanger also develops towards the directions of high efficiency, large size and long service life; in particular, the coiled tube heat exchanger is being developed toward higher temperature, larger size, higher pressure and miniaturization. The quality of the welding seam is critical to the quality of the heat exchanger, and the condition that the quality of the welding seam is not satisfied can directly lead to leakage of the heat exchanger.

In order to meet the requirements of the product structure and related processes of heat exchangers, in particular to wound heat exchangers, the connection of the tube plates and the heat exchange tubes of the high-pressure wound heat exchanger needs to adopt inner hole welding. The welding quality of the heat exchange tube and the tube plate hole directly determines the service quality and service life of the winding type heat exchanger. The heat exchange tube generally adopts seamless round tubes with phi 16 or phi 19, the diameters of tube plate holes are generally smaller than 16mm, and the through holes on the tube plate are densely arranged and limited by the small through holes, so that a common argon arc welding gun cannot directly weld; accordingly, there is a need for a welding gun that can accommodate a wide variety of tube sheet thicknesses and heat exchange tube gauges.

Disclosure of Invention

Aiming at the defects, the utility model provides a novel welding gun for deep hole welding of an elongated hole, which can be used for adapting to welding of tube plates with different thicknesses and heat exchange tubes with different specifications.

The utility model provides a novel welder of slot and hole deep hole welding, welder is used for the hole with heat transfer pipe welding to the heat exchanger tube sheet, welder is including the welder body that connects gradually, welding core rod subassembly and welding torch head and locating component, welding core rod subassembly includes the welding core rod fixed plate of being connected with welder body and is fixed in the welding core rod of welding core rod fixed plate, welding torch head and locating component are connected to the welding core rod, welding core rod subassembly is still including being connected to the location slide of welding core rod fixed plate and follow the gliding slider of location slide, the slider drives the welding core rod and removes, with the position that adjustment welding torch head and locating component are located the hole.

Further, the welding torch head and the positioning assembly comprise a metal positioning table and a welding torch head, the welding core rod passes through the metal positioning table and is fixedly connected with the welding torch head, the welding torch head and the positioning assembly further comprise a positioning sleeve, a first spacing sleeve, an insulating positioning sleeve and a second spacing sleeve which are sleeved on the welding core rod along the direction of the metal positioning table towards the welding torch head, and the second spacing sleeve is positioned at the joint of the welding core rod and the welding torch head; the torch head and the locating assembly further comprise a ceramic spacer housing the torch head.

Further, the connection part of the positioning sleeve and the first spacer sleeve, the connection part of the first spacer sleeve and the insulating positioning sleeve, and the connection part of the insulating positioning sleeve and the second spacer sleeve form a boss structure.

Furthermore, the welding torch head and the ceramic spacer are all designed in a detachable way; the welding torch head is provided with a tungsten electrode protruding outwards from the welding torch head, and the tungsten electrode and the metal positioning table are both in detachable design.

Further, the torch head is radially formed with a tungsten electrode fixing hole for mounting a tungsten electrode, and a vent hole circumferentially surrounding the tungsten electrode fixing hole.

Further, the welding core rod is hollow, one end of the welding core rod is connected with the welding torch head, and the other end of the welding core rod is connected with the protection gas joint and the power supply joint; the welding core rod is provided with an internal thread, and the welding torch head is provided with an external thread matched with the internal thread.

Further, the welding core rod assembly further comprises a welding core rod insulating fixing block for fixing the welding core rod, and the welding core rod insulating fixing block is connected to the sliding block.

Further, the welding gun further comprises a supporting component, the supporting component comprises a rear supporting plate arranged between the welding core rod fixing plate and the welding gun body and a front supporting plate arranged opposite to the rear supporting plate, and the front supporting plate and the rear supporting plate are connected through a plurality of bolts.

Further, the welding core rod fixing plate is internally provided with a spline, the welding gun body is provided with a spline shaft matched with the spline, the spline shaft rotates to drive the welding core rod fixing plate to rotate, and the welding core rod fixing plate drives the welding core rod to rotate through the positioning slide way.

Further, a control system, a driving device, a power supply and an air source are arranged in the welding gun body.

The utility model has the beneficial effects that:

(1) The welding torch head and the positioning component extend into the inner hole to reach the welding seam to realize welding when welding, wherein the welding torch head and the positioning component are connected to the welding core rod, and meanwhile, the welding core rod is connected to the sliding block, so that the sliding block can move with the welding core rod when sliding on the positioning slide way, and further drive the welding torch head and the positioning component to move, and the welding torch head and the positioning component reach the welding seam to realize welding through the movement of the welding torch head and the positioning component.

(2) Through setting up welding core pole insulating fixed block and being connected with the welding core pole, can effectively make between welding core pole and the welder body be in insulating state, protect welding core pole and welder body.

(3) The welding torch head and the corresponding ceramic spacer bush are replaced, so that the welding gun can be adapted to tube plates with different thicknesses; the tungsten electrode is used as the electrode material of the welding gun, the arcing performance of the electrode is better, the stability of the arc column is higher, the electrode burning loss rate is smaller, the tungsten electrode is outwards protruded from the welding torch head, so that welding is realized, the metal positioning table is provided with a convex boss, and the boss can be matched with a through hole at the tube plate of the heat exchanger to realize positioning during welding, so that the welding gun can be matched with heat exchange tubes with different diameters by replacing the tungsten electrode and the metal positioning table.

Drawings

Embodiments of the utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram illustrating an exemplary embodiment of a welding gun according to the present utility model;

FIG. 2 is a schematic diagram illustrating one exemplary embodiment of a weld mandrel assembly in accordance with the present utility model;

FIG. 3 is a schematic top view illustrating one exemplary embodiment of a torch head and positioning assembly of the present utility model;

FIG. 4 is a schematic diagram illustrating an exemplary embodiment of a welding mandrel in accordance with the present utility model;

FIG. 5 is a schematic diagram illustrating one exemplary embodiment of a torch head according to the present utility model;

fig. 6 is a schematic view illustrating the structure of an exemplary embodiment of a support assembly according to the present utility model.

Reference numerals:

1. a welding gun body 11 and a spline shaft;

21. the welding core rod fixing plate 211, the spline 22, the welding core rod 23, the positioning slide way 24, the sliding block 25 and the welding core rod insulating fixing block;

31. the welding torch comprises a metal positioning table 32, a welding torch head 321, vent holes 33, positioning sleeves 34, a first spacer sleeve 35, an insulating positioning sleeve 36, a second spacer sleeve 37, a ceramic spacer sleeve 38 and a tungsten electrode;

41. front support plate, 42, rear support plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, in the embodiments of the present utility model, terms such as left, right, up, down, front, and back are merely relative terms or references to a normal use state of a product, i.e. a traveling direction of the product, and should not be construed as limiting.

In addition, the dynamic terms such as "relative movement" in the embodiments of the present utility model include not only a change in position but also a movement in which a state is changed without a relative change in position such as rotation or rolling.

Finally, it is noted that when an element is referred to as being "on" or "disposed on" another element, it can be on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

The utility model relates to a novel welding gun for deep hole welding of an elongated hole, which is shown in fig. 1-6, and is used for welding a heat exchange tube to an inner hole of a heat exchanger tube plate.

In the utility model, the welding gun comprises a welding gun body 1, a welding core rod assembly and a welding torch head and a positioning assembly which are sequentially connected, wherein the welding core rod assembly comprises a welding core rod fixing plate 21 connected with the welding gun body 1 and a welding core rod 22 fixed on the welding core rod fixing plate 21, the welding torch head and the positioning assembly are connected to the welding core rod 22, the welding core rod assembly also comprises a positioning slide 23 connected to the welding core rod fixing plate 21 and a sliding block 24 sliding along the positioning slide 23, the sliding block 24 drives the welding core rod 22 to move so as to adjust the position of the welding torch head and the positioning assembly at an inner hole, the welding torch head and the positioning assembly can extend into the inner hole to achieve welding at a welding position when welding, and meanwhile, the welding torch head and the positioning assembly are connected to the welding core rod 22, and meanwhile, the sliding block 24 can move along with the welding core rod 22 when the positioning slide along with the positioning slide 23, and then drive the welding torch head and the positioning assembly to move, and the welding torch head can reach the welding position of the welding seam for welding, and the welding torch can adapt to welding gun tube plates with different welding thicknesses.

Wherein, a control system, a driving device, a power supply and an air source are arranged in the welding gun body 1; the device for controlling and driving is integrated at the welding gun body 1, so that the operation is more convenient, and the structure is more compact, wherein the connection and the use of a control system, a driving device, a power supply and an air source can be seen in the prior art, and the description is omitted here.

Since the torch head and the positioning assembly are moved by the movement of the welding mandrel 22, and the welding mandrel 22 is moved by the sliding of the slide 24, in one embodiment the welding mandrel assembly further comprises a welding mandrel insulating fixture 25 that secures the welding mandrel 22, the welding mandrel insulating fixture 25 being connected to the slide 24; by arranging the welding core rod insulating fixing block 25 to be connected with the welding core rod 22, the welding core rod 22 and the welding gun body 1 can be effectively in an insulating state, the welding core rod 22 and the welding gun body 1 are protected, and the welding core rod insulating fixing block 25 plays an insulating role, so that the welding core rod insulating fixing block 25 can be made of insulating materials, such as polytetrafluoroethylene and the like.

In the utility model, the welding gun also comprises a supporting component, wherein the supporting component comprises a rear supporting plate 42 arranged between the welding core rod fixing plate 21 and the welding gun body 1 and a front supporting plate 41 arranged opposite to the rear supporting plate 42, and the front supporting plate 41 and the rear supporting plate 42 are connected through a plurality of bolts; the rear support plate 42 is located between the welding core fixing plate 21 and the welding gun body 1, that is, the welding core fixing plate 21 in the welding core assembly is indirectly connected with the welding gun body 1 through the rear support plate 42, meanwhile, the front support plate 41 and the rear support plate 42 are oppositely arranged, the welding core 22 passes through the front support plate 41 to be connected with the welding torch head and the positioning assembly when being arranged, and the positioning slide 23, the sliding block 24, the welding core insulating fixing block 25 and other components in the welding core assembly are located between the front support plate 41 and the rear support plate 42, so that the welding core assembly is protected through the supporting assembly.

In one embodiment, a spline 211 is arranged in the welding core rod fixing plate 21, the welding gun body 1 is provided with a spline shaft 11 matched with the spline 211, the spline shaft 11 rotates to drive the welding core rod fixing plate 21 to rotate, and the welding core rod fixing plate 21 drives the welding core rod 22 to rotate through a positioning slideway 23; when welding is carried out by a welding gun, the welding gun needs to extend into an inner hole to realize inner hole welding, in the welding process, the welding gun needs to rotate to weld a welding seam, a spline shaft 11 at the welding gun body 1 rotates to drive a welding core rod fixing plate 21 to rotate, meanwhile, a positioning slide rail 23 is connected to the welding core rod fixing plate 21, so that the positioning slide rail 23 synchronously rotates to drive a welding core rod 22 to rotate, and a welding torch head and a positioning assembly are connected to the welding core rod 22, so that the welding torch head and the positioning assembly also rotate to finish circumferential welding; according to the utility model, the spline shaft 11 at the welding gun body 1 is matched with the spline 211 at the welding mandrel fixing plate 21, so that the whole stress is uniform, the stress concentration is small, larger torque can be born, the service life is longer, and meanwhile, the spline 211 is adopted to realize good connection guidance and more accurate use.

In one embodiment, the welding torch head and positioning assembly comprises a metal positioning table 31 and a welding torch head 32, the welding core rod 22 passes through the metal positioning table 31 and is fixedly connected with the welding torch head 32, the welding torch head and positioning assembly further comprises a positioning sleeve 33 sleeved on the welding core rod 22, a first spacing sleeve 34, an insulating positioning sleeve 35 and a second spacing sleeve 36 along the direction of the metal positioning table 31 towards the welding torch head 32, and the second spacing sleeve 36 is positioned at the joint of the welding core rod 22 and the welding torch head 32; the torch head and positioning assembly further comprises a ceramic spacer 37 that encases the torch head 32; by arranging the positioning sleeve 33, the insulating positioning sleeve 35, the first spacing sleeve 34 and the second spacing sleeve 36 for separation at the welding core rod 22, the welding core rod 22 and the heat exchanger tube plate are in an insulating contact state during welding, and the ceramic spacer sleeve 37 is made of ceramic with high temperature resistance and good insulating property, so that the welding torch head 32, the heat exchange tube and the heat exchanger tube plate are in an insulating and heat-insulating state, and the welding quality is better ensured.

Preferably, the connection part of the positioning sleeve 33 and the first spacer sleeve 34, the connection part of the first spacer sleeve 34 and the insulating positioning sleeve 35, and the connection part of the insulating positioning sleeve 35 and the second spacer sleeve 36 form a boss structure; the positioning sleeve 33, the first spacer sleeve 34, the insulating positioning sleeve 35 and the second spacer sleeve 36 are all sleeved at the welding core rod 22, so that the positioning sleeve 33, the first spacer sleeve 34, the insulating positioning sleeve 35 and the second spacer sleeve 36 are coaxially arranged, the positioning sleeve 33 is adjacent to the metal positioning table 31, the positioning sleeve 33 is connected with the metal positioning table 31, the first spacer sleeve 34 is adjacent to the positioning sleeve 33, the diameter of the first spacer sleeve 34 is larger than that of the positioning sleeve 33, and correspondingly, a stepped boss structure is formed between the first spacer sleeve 34 and the positioning sleeve 33, and similarly, the diameter of the first spacer sleeve 34 is larger than that of the insulating positioning sleeve 35, and the diameter of the second spacer sleeve 36 is larger than that of the insulating positioning sleeve 35.

It can be appreciated that the front support plate 41 and the rear support plate 42 in the utility model protect the positioning slide 23, the sliding block 24, the welding core rod insulating fixing block 25 and other components in the welding core rod assembly, so that the welding core rod 22 passes through the front support plate 41 when being arranged, and the metal positioning table 31 is fixed at the front support plate 41 when being arranged, thereby ensuring that the structure is more compact; wherein, when the metal positioning table 31 is connected with the front support plate 41, the metal positioning table 31 is fixed at the front support plate 41 by bolts.

In one embodiment, the welding core rod 22 is hollow, one end of the welding core rod 22 is connected with the welding torch head 32, the other end is connected with the protecting gas joint and the power joint, and the protecting gas joint and the power joint are connected with a gas source and a power source in the welding gun body 1 through a gas pipe and a power wire; the welding core rod 22 department is equipped with the internal thread, and the welding torch head 32 is equipped with internal thread complex external screw thread, realizes the connection of welding core rod 22 and welding torch head 32 through the cooperation of internal thread and external screw thread, connects convenient and stable, adopts threaded connection simultaneously, also makes things convenient for the installation and the dismantlement of welding core rod 22.

Preferably, the welding torch head 32 and the ceramic spacer 37 are both designed in a detachable manner, the welding torch head 32 is a welding area of a welding gun, the ceramic spacer 37 is sleeved outside the welding torch head 32 to protect the welding torch head 32, and the welding gun can be matched with tube plates with different thicknesses by replacing the welding torch head 32 and the corresponding ceramic spacer 37; the welding torch head 32 is provided with the tungsten electrode 38 protruding outside the welding torch head 32, the tungsten electrode 38 and the metal positioning table 31 are of detachable design, the tungsten electrode 38 is used as electrode materials of a welding gun, the arcing performance of an electrode is better, the stability of an arc column is higher, the electrode burning loss rate is smaller, the tungsten electrode 38 is protruding outside the welding torch head 32, accordingly, the welding is realized, the ceramic spacer 37 sleeved outside the welding torch head 32 is also provided with a through hole for the tungsten electrode 38 to penetrate out, the metal positioning table 31 is provided with a protruding boss, and the boss can be matched with the through hole at the tube plate of the heat exchanger to realize positioning during welding, so that the welding gun can be matched with heat exchange tubes with different diameters through replacing the tungsten electrode 38 and the metal positioning table 31.

In one embodiment, the torch head 32 radially forms a tungsten electrode 38 mounting hole for mounting the tungsten electrode 38, and a vent hole 321 circumferentially surrounding the tungsten electrode 38 mounting hole; the tungsten electrode 38 passes through the ceramic spacer 37 through the tungsten electrode 38 fixing hole, the tungsten electrode 38 fastening screw fixes the tungsten electrode 38 through the screw thread at the welding torch head 32, and the ventilation hole 321 realizes ventilation of the welding torch head 32.

The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are to be included in the scope of the claims of the present utility model.

Claims (10)

1. The utility model provides a novel welder of slot deep hole welding, its characterized in that, welder is used for the hole with heat transfer pipe welded to the heat exchanger tube sheet, welder includes welder body, welding core rod subassembly and welding torch head and locating component that connect gradually, welding core rod subassembly include with welder body coupling's welding core rod fixed plate and be fixed in the welding core rod of welding core rod fixed plate, welding torch head and locating component are connected to the welding core rod, welding core rod subassembly still including be connected to the location slide of welding core rod fixed plate and follow the gliding slider of location slide, the slider drives the welding core rod removes, in order to adjust welding torch head and locating component are located the position of hole.

2. The novel welding gun for deep hole welding with the elongated hole as claimed in claim 1, wherein the welding head and the positioning assembly comprise a metal positioning table and a welding head, the welding core rod penetrates through the metal positioning table to be fixedly connected with the welding head, the welding head and the positioning assembly further comprise a positioning sleeve sleeved on the welding core rod, a first spacer sleeve, an insulating positioning sleeve and a second spacer sleeve, and the second spacer sleeve is positioned at the joint of the welding core rod and the welding head along the direction of the metal positioning table towards the welding head; the welding torch head and the positioning assembly further comprise a ceramic spacer which covers the welding torch head.

3. The novel welding gun for deep hole welding of an elongated hole according to claim 2, wherein the joint of the positioning sleeve and the first spacer sleeve, the joint of the first spacer sleeve and the insulating positioning sleeve and the joint of the insulating positioning sleeve and the second spacer sleeve form a boss structure.

4. The novel welding gun for deep hole welding with the long and thin holes, as claimed in claim 2, wherein the welding torch head and the ceramic spacer are of detachable design;

the welding torch head is provided with a tungsten electrode protruding out of the welding torch head, and the tungsten electrode and the metal positioning table are of detachable design.

5. The new type of elongated hole deep hole welding gun according to claim 4, wherein the torch head forms a tungsten electrode fixing hole for mounting the tungsten electrode in a radial direction, and ventilation holes circumferentially surrounding the tungsten electrode fixing hole.

6. The novel welding gun for deep hole welding with the elongated hole as claimed in claim 2, wherein the welding core rod is hollow, one end of the welding core rod is connected with the welding torch head, and the other end is connected with a shielding gas connector and a power connector; the welding core rod is provided with an internal thread, and the welding torch head is provided with an external thread matched with the internal thread.

7. The new gun for deep hole welding of elongated holes of claim 1, wherein said welding mandrel assembly further comprises a welding mandrel insulating fixture for securing said welding mandrel, said welding mandrel insulating fixture being connected to said slider.

8. The novel welding gun for deep hole welding of an elongated hole according to claim 1, further comprising a supporting assembly, wherein the supporting assembly comprises a rear supporting plate arranged between the welding core rod fixing plate and the welding gun body and a front supporting plate arranged opposite to the rear supporting plate, and the front supporting plate and the rear supporting plate are connected through a plurality of bolts.

9. The novel welding gun for deep hole welding of an elongated hole according to claim 7, wherein a spline is arranged in the welding core rod fixing plate, the welding gun body is provided with a spline shaft matched with the spline, the spline shaft rotates to drive the welding core rod fixing plate to rotate, and the welding core rod fixing plate drives the welding core rod to rotate through the positioning slide way.

10. The novel welding gun for deep hole welding of the long and thin holes, as claimed in claim 1, wherein a control system, a driving device, a power supply and a gas source are arranged in the welding gun body.