CN219548974U

CN219548974U - Double-row engine cooling water pipe and welding clamp thereof

Info

Publication number: CN219548974U
Application number: CN202320610367.XU
Authority: CN
Inventors: 董阿能; 陈敏
Original assignee: Ningbo T Erre Automotive Components Co ltd
Current assignee: Ningbo T Erre Automotive Components Co ltd
Priority date: 2023-03-24
Filing date: 2023-03-24
Publication date: 2023-08-18
Anticipated expiration: 2033-03-24

Abstract

The utility model relates to the technical field of engine accessories, in particular to a double-row engine cooling water pipe and a welding clamp thereof, wherein the double-row engine cooling water pipe comprises: the two pipe bodies and the plurality of connecting pieces are arranged side by side and are separated by a preset distance, and two ends of each connecting piece are welded with the two pipe bodies respectively; welding fixture for clamping double engine cooling water pipe includes: the clamping device comprises a frame body, a fixing piece and a moving piece, wherein the fixing piece is fixed on the frame body, the moving piece is arranged on the frame body in a sliding mode and is close to or far away from the fixing piece, the fixing piece and the moving piece are both provided with caulking grooves, and the pipe body is arranged in the caulking grooves.

Description

Double-row engine cooling water pipe and welding clamp thereof

Technical Field

The utility model relates to the technical field of engine accessories, in particular to a double-row engine cooling water pipe and a welding clamp thereof.

Background

The water cooling system of automobile engine utilizes water pump to raise pressure of cooling liquid, and the cooling liquid is forced to circulate in the engine so as to make the working temperature of engine be kept in preset temperature range under various working conditions. The single-row water pipe is limited by the pressure of the water pump and the pipe body, so that the cooling liquid flow is limited, and the cooling is not timely easily caused, therefore, two more engine cooling water pipes are arranged on the existing engine.

The existing two engine cooling water pipes are all independently installed on an engine, but: because the engine can produce vibration when working to arouse two engine cooling water pipe vibrations, consequently, during the installation, if two engine cooling water pipe is close to each other, then two engine cooling water pipe is easy to collide with each other when vibrating, causes abnormal sound and causes the harm to the outer wall of engine cooling water pipe, if produce pit or damage, in order to avoid above-mentioned condition, the installer makes two engine cooling water pipe interval reservation distance arrangement generally, but this again leads to two engine cooling water pipe occupation space is too big on the engine, influences the arrangement of other parts on the engine.

In addition, there is a welding fixture for clamping two spaced engine cooling water pipes, including two clamping ends, two clamping ends are spaced apart by a predetermined distance, each clamping end clamps one engine cooling water pipe, but in view of the different structures of the engine cooling water pipes and the fixed distance between the two clamping ends, the welding fixture can generally clamp only two engine cooling water pipes with specific width and specific shape, so that the universality is not enough, and if enterprises produce two engine cooling water pipes with another specification and arranged at intervals, a new special welding fixture needs to be configured, and the equipment cost and the land cost are both high.

Therefore, the requirements of providing a double-row engine cooling water pipe which occupies small space as a whole and is not mutually collided with two cooling water pipes and a welding fixture with adjustable width and better universality exist.

Disclosure of Invention

The utility model mainly aims to provide a cooling water pipe of a double-row engine, wherein the cooling water pipe of the double-row engine comprises two pipe bodies and a plurality of connecting pieces, the two pipe bodies are arranged side by side and are separated by a preset distance, two ends of each connecting piece are respectively welded with the two pipe bodies, each connecting piece comprises two attaching parts and a connecting part, the attaching parts are in one-to-one correspondence with the pipe bodies, each attaching part is provided with an arc surface, the connecting parts are provided with a plurality of connecting holes, when the connecting pieces are welded with the two pipe bodies, the arc surfaces are attached with the corresponding pipe bodies of the pipe bodies, and the two independent cooling water pipes in the prior art are connected into a whole through the connecting pieces, so that the two pipe bodies are close to each other but can not collide with each other due to vibration, meanwhile, the occupied space is reduced, and the advantages of small whole occupied space and no mutual collision of the two cooling water pipes are realized.

The utility model further aims to provide a welding fixture for clamping the double-row engine cooling water pipe, wherein the welding fixture comprises a plurality of clamping devices and a positioning device, each clamping device comprises a frame body, a fixing piece and a moving piece, the fixing piece is fixedly arranged on the frame body, the moving piece is arranged on the frame body in a sliding manner and is close to or far from the fixing piece, each fixing piece and each moving piece is provided with an embedding groove, and the straight pipes of the pipe body are combined in the embedding grooves; the positioning device comprises a support and two stretching-in assemblies, the stretching-in assemblies are in one-to-one correspondence with the pipe bodies, one end of each stretching-in assembly is fixedly arranged on the support, the other end of each stretching-in assembly stretches into the corresponding pipe body, and the distance between the fixing piece and the moving piece can be adjusted by sliding the moving piece, so that double-row pipelines under different distances can be adapted, and the positioning device has the advantages of adjustable width and better universality.

The utility model further aims to provide a welding fixture, wherein the top surface of the support is provided with two mounting grooves, each mounting groove is internally and fixedly provided with one extending component, each extending component comprises an extending pipe and a flange, one end of the extending pipe is fixedly connected with the flange, the other end of the extending pipe extends into the corresponding pipe body and is attached to the hole wall of the pipe body, and the flange is arranged in the mounting groove and is fixedly connected with the support and can be detached through the extending component so as to adapt to double-row pipelines with different specifications, so that the advantage of better universality is realized.

The utility model further aims to provide the double-row engine cooling water pipe and the welding clamp thereof, wherein the double-row engine cooling water pipe and the welding clamp thereof have the advantages of simple structure, convenience in operation, no complicated manufacturing process and expensive materials, higher economy and easiness in popularization and use.

In order to achieve at least one of the above objects, the present utility model provides a double-row engine cooling water pipe, wherein the double-row engine cooling water pipe comprises:

the two pipe bodies are arranged side by side and are spaced by a preset distance; and

and the two ends of each connecting piece are welded with the two pipe bodies respectively.

In one or more embodiments of the present utility model, each of the tube bodies includes a straight tube assembly, two transition portions and two bending portions, where the straight tube assembly includes a first straight tube portion, a second straight tube portion and a third straight tube portion, the second straight tube portion is located between the first straight tube portion and the third straight tube portion, two ends of the second straight tube portion are respectively connected with the two transition portions, the two bending portions are respectively located at two ends of the tube body, and the straight tube assembly is located between the two bending portions.

In one or more embodiments of the present utility model, each connecting piece includes two attaching portions and a connecting portion, the attaching portions and the pipe body are in one-to-one correspondence, each attaching portion has an arc surface, the connecting portion has a plurality of connecting holes, and when the connecting piece is welded with the two pipe bodies, the arc surface is attached to the pipe body of the corresponding pipe body.

In order to achieve at least one of the above objects, the present utility model provides a welding jig for clamping the double-row engine cooling water pipe, wherein the welding jig comprises:

each clamping device comprises a frame body, a fixing piece and a moving piece, wherein the fixing piece is fixedly arranged on the frame body, the moving piece is arranged on the frame body in a sliding mode and is close to or far away from the fixing piece, the fixing piece and the moving piece are both provided with a caulking groove, and the straight pipe of the pipe body is arranged in the caulking groove in a combined mode; and

the positioning device comprises a support and two stretching-in assemblies, the stretching-in assemblies are in one-to-one correspondence with the pipe bodies, one end of each stretching-in assembly is fixedly arranged on the support, and the other end of each stretching-in assembly stretches into the corresponding pipe body.

In one or more embodiments of the present utility model, the frame includes a turntable and a support member, the turntable is rotatably mounted on the support member, and the fixing member and the moving member are both disposed on the turntable.

In one or more embodiments of the present utility model, the turntable has a chute, one end of the chute is abutted to a side wall of the fixing member, and the moving member is slidably disposed in the chute.

In one or more embodiments of the present utility model, the clip device further includes a rotating member rotatably mounted on the turntable, and the rotating member is located below the chute, and the rotating member is in screw driving connection with the moving member.

In one or more embodiments of the present utility model, the turntable has a threaded hole therethrough, and the frame further includes a fastener threadedly coupled to the threaded hole, the fastener abutting or being separated from the support when the fastener is rotated by a predetermined angle.

In one or more embodiments of the present utility model, the top surface of the support has two mounting grooves, and each of the mounting grooves is fixedly provided with one of the extending assemblies.

In one or more embodiments of the present utility model, each of the extending assemblies includes an extending pipe and a flange, one end of the extending pipe is fixedly connected with the flange, the other end of the extending pipe extends into the corresponding pipe body and is attached to the hole wall of the pipe body, and the flange is disposed in the mounting groove and is fixedly connected with the support.

In the embodiment of the utility model, the double-row engine cooling water pipe comprises two pipe bodies and a plurality of connecting pieces, wherein the two pipe bodies are arranged side by side and are separated by a preset distance, two ends of each connecting piece are respectively welded with the two pipe bodies, the two independent pipe bodies in the prior art are converted into integral connection through the connecting pieces, the positions of the two pipe bodies are fixed, the risk of collision between the two pipe bodies after approaching is avoided, and meanwhile, the whole occupied space of the two pipe bodies is small; the welding fixture is used for clamping the double-row engine cooling water pipe and comprises a plurality of clamping devices and a positioning device, wherein the clamping devices comprise a frame body, a fixing piece and a moving piece, the fixing piece is fixedly arranged on the frame body, the moving piece is arranged on the frame body in a sliding mode and is close to or far away from the fixing piece, the fixing piece and the moving piece are both provided with a caulking groove for clamping the pipe body, the positioning device comprises a support and a two-extension assembly, one end of the extension assembly extends into the corresponding pipe body, the width of the fixing piece and the width of the moving piece are adjustable through the sliding arrangement of the moving piece, so that the double-row engine cooling water pipe with different intervals is adapted, and the advantages of adjustable width and good universality are achieved.

Drawings

These and/or other aspects and advantages of the present utility model will become more apparent and more readily appreciated from the following detailed description of the embodiments of the utility model, taken in conjunction with the accompanying drawings, wherein:

FIG. 1 illustrates a schematic diagram of a cooling water pipe of a dual-row engine according to an embodiment of the present utility model;

FIG. 2 illustrates a schematic structural view of a connector;

FIG. 3 is a schematic diagram illustrating a structure of a welding fixture for clamping the cooling water pipes of the double-row engine according to an embodiment of the present utility model;

fig. 4 illustrates a schematic structural view of the clip assembly.

Description of the embodiments

The terms and words used in the following description and claims are not limited to literal meanings, but are used only by the inventors to enable a clear and consistent understanding of the utility model. It will be apparent to those skilled in the art, therefore, that the following description of the various embodiments of the utility model is provided for illustration only and not for the purpose of limiting the utility model as defined by the appended claims and their equivalents.

It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.

Although ordinal numbers such as "first," "second," etc., will be used to describe various components, those components are not limited herein. The term is used merely to distinguish one component from another. For example, a first component may be referred to as a second component, and likewise, a second component may be referred to as a first component, without departing from the teachings of the inventive concept. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular is intended to include the plural as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, or groups thereof.

Summary of the application

When the engine works, vibration is generated and the two engine cooling water pipes are caused to vibrate, so that when the engine is installed, if the two engine cooling water pipes are close to each other, the two engine cooling water pipes are easy to collide with each other during vibration, abnormal sound is caused, the outer wall of the engine cooling water pipe is damaged, and if the two engine cooling water pipes are arranged at a preset distance, the occupied space of the two engine cooling water pipes on the engine is too large, and the arrangement of other parts on the engine is influenced; in addition, a conventional welding jig has a disadvantage in that it is generally only capable of clamping two engine cooling water pipes having a specific width and a specific shape, in view of the difference in structure of the engine cooling water pipes and the fixed distance between the two clamping ends.

Based on the technical problems, the utility model provides the double-row engine cooling water pipe and the welding clamp thereof, wherein the double-row engine cooling water pipe and the welding clamp thereof have simple structures, do not relate to complex manufacturing processes and expensive materials, have higher economical efficiency, and are easy to produce and low in cost for manufacturers, thereby being more beneficial to control the production cost and further being beneficial to product popularization and use.

An exemplary double-row engine cooling water pipe and a welding fixture thereof,

referring to fig. 1 to 4, a cooling water pipe for a dual-row engine according to a preferred embodiment of the present utility model, as shown in fig. 1, includes two pipe bodies 10 and a plurality of connecting members 20, wherein the two pipe bodies 10 are arranged side by side and spaced apart by a predetermined distance, and both ends of each connecting member 20 are welded to the two pipe bodies 10, respectively. It should be noted that, both the pipe bodies 10 are installed on the automobile engine, and the refrigerant flows in the pipe bodies 10, and the cooling effect is better than that of just one pipe body due to the arrangement of the two pipe bodies 10; by welding the two pipe bodies 10 by the connecting piece 20, the relative positions of the two pipe bodies 10 are fixed, the phenomenon that the two pipe bodies 10 collide with each other after vibrating due to too close arrangement is avoided, and further, the two independent pipe bodies 10 are arranged at a preset distance in the installation process for avoiding the mutual collision, the whole occupied space is small, and space is provided for the arrangement of other parts on the engine. Compared with the prior art, the two independently arranged pipe bodies are integrally connected through the connecting piece 20, so that the advantages of small overall occupied space and no mutual collision of the two cooling water pipes are realized.

Further, to adapt to the installation situation of the specific engine cooling system, each tube body 10 includes a straight tube assembly 101, two transition portions 102 and two bending portions 103, the straight tube assembly 101 includes a first main tube portion 1011, a second straight tube portion 1012 and a third straight tube portion 1013, the second straight tube portion 1012 is located between the first main tube portion 1011 and the third straight tube portion 1013, two ends of the second straight tube portion 1012 are respectively connected with the two transition portions 102, two bending portions 103 are respectively located at two ends of the tube body 10, and the straight tube assembly 101 is located between the two bending portions 103.

Specifically, the two ends of each transition portion 102 are bent at a predetermined angle, two ends of one transition portion 102 are respectively connected to the first main pipe portion 1011 and the second straight pipe portion 1012, and two ends of the other transition portion 102 are respectively connected to the second straight pipe portion 1012 and the third straight pipe portion 1013, and the connection manner is further implemented as an integral molding; one end of the third straight pipe part 1013 away from the transition part 102 is connected with one bending part 103, the bending angle of one end of the bending part 103 close to the third straight pipe part 1013 is 85-95 degrees, and one end of the first main pipe part 1011 away from the transition part 102 is connected with the other bending part 103; the connectors 20 are provided in each of the first main pipe portion 1011 and the second straight pipe portion 1012, and the connectors 20 in the first main pipe portion 1011 are oriented opposite to the connectors 20 in the second straight pipe portion 1012.

Further, as shown in fig. 1 and 2, each connecting piece 20 includes two attaching portions 201 and a connecting portion 202, the attaching portions 201 and the pipe bodies 10 are in one-to-one correspondence, the attaching portions 201 are arc-shaped and arch, each attaching portion 201 has an arc surface (not shown in the drawing), the connecting portion 202 has a plurality of connecting holes 2021, in this embodiment, the number of the connecting holes 2021 is one, when the connecting piece 20 and the two pipe bodies 10 are welded, the arc surfaces are attached to the corresponding pipe bodies 10 of the pipe bodies 10, and the connecting piece 20 and the engine are connected through the connecting holes 2021.

In addition, in order to avoid bending the connecting piece 20 after being stressed, the two pipe bodies 10 are made to approach or separate from each other, as shown in fig. 2, the connecting piece 20 further includes a thickened portion 203, the thickened portion 203 is located between the two attaching portions 201, and the thickness of the thickened portion 203 is greater than the thickness of the attaching portions 201 or the connecting portion 202.

Fig. 3 to 4 illustrate a welding jig for clamping the double-row engine cooling water pipe, which provides conditions for a worker to weld the connection member 20 to the pipe body 10, according to a preferred embodiment of the present utility model.

Specifically, as shown in fig. 3 and 4, the welding fixture includes a plurality of clip devices 30 and a positioning device 40, each clip device 30 includes a frame 301, a fixing member 302 and a moving member 303, the fixing member 302 is fixedly mounted on the frame 301, the connecting manner includes but is not limited to threaded connection, the moving member 303 is slidably disposed on the frame 301 and is close to or far from the fixing member 302, each of the fixing member 302 and the moving member 303 has an embedding groove 3021, the straight tube assembly 101 of the tube body 10 is disposed in the embedding groove 3021, the positioning device 40 includes a support 401 and two extending members 402, the extending members 402 are in one-to-one correspondence with the tube body 10, one end of each extending member 402 is fixedly mounted on the support 401, and the other end of each extending member 402 extends into the corresponding tube body 10.

It should be noted that, as shown in fig. 4, each of the caulking grooves 3021 has a notch (not shown), and a width dimension of the notch is smaller than a pipe diameter of the straight pipe assembly 101; in addition, the fixing member 302 and the moving member 303 are made of plastic, and have a certain elastic deformation amount, when the straight tube assembly 101 enters the notch, the two sides of the notch deform and make the straight tube assembly 101 enter the caulking groove 3021; in this embodiment, the first main pipe portion 1011 or the third straight pipe portion 1013 is inserted into the insertion groove 3021 through the insertion groove 3021 on the fixing member 302 and the moving member 303, so as to limit the radial movement of the pipe body 10, and meanwhile, the insertion assembly 402 is inserted into the corresponding pipe body 10, so as to determine the placement angle of the pipe body 10, and limit the axial movement of the pipe body 10, so that the welding personnel can weld the connecting member 20 to the two pipe bodies 10.

It should be further noted that, in the prior art, the distance between the two clamping ends is fixed, which is only suitable for double-row pipelines with a specific width, and in the embodiment of the present utility model, the moving member 303 is movably disposed, and further, the distance between the fixed member 302 and the moving member 303 is adjustable, which is suitable for double-row pipelines with various distances, and achieves the advantages of adjustable width and better versatility.

In addition, the tube body 10 is often a bent tube, and it is easy to see that the central axis of the first main tube portion 1011 and the central axis of the third straight tube portion 1013 are disposed obliquely, so that the versatility of the welding jig is improved for the application of the inclination angle of the tube body 10, and the angle of the fixing member 302 and the moving member 303 is adjustable, specifically, as shown in fig. 3 and 4, the frame 301 includes a rotary disc 3011 and a supporting member 3012, the rotary disc 3011 is rotatably mounted on the supporting member 3012, and the fixing member 302 and the moving member 303 are both disposed on the rotary disc 3011.

More specifically, to realize the rotary mounting of the rotary disk 3011 on the support 3012, as shown in fig. 4, an extension (not shown) is provided at one end of the support 3012, the extension is a cylinder, a bearing is sleeved on the cylinder, the rotary disk 3011 is sleeved on the bearing, and a bottom surface of the rotary disk 3011 is spaced from a surface of the support 3012 having the extension by a predetermined distance.

Further, in order to realize that the moving member 303 is slidably disposed on the frame 301, as shown in fig. 4, the turntable 3011 has a chute 30111, and a slot at one end of the chute 30111 abuts against a side wall of the fixed member 302, so as to provide a condition for the moving member 303 to abut against the fixed member 302; the moving member 303 is slidably disposed in the chute 30111.

In addition, as shown in fig. 4, the fastening device 30 further includes a rotating member 3013, where the rotating member 3013 is rotatably mounted on the turntable 3011 through a bearing, and the rotating member 3013 is located below the chute 30111, and the rotating member 3013 is in screw driving connection with the moving member 303. Specifically, the bottom of the moving member 303 and the rotating member 3013 have spiral grooves that are matched, and when the rotating member 3013 rotates by a predetermined angle, the moving member 303 moves in the chute 30111 and approaches or separates from the fixed member 302, so as to adapt to double-row pipelines with different pitches.

Further, after the rotary table 3011 rotates around the central axis of the extending end by a predetermined angle, as shown in fig. 4, the rotary table 3011 has a threaded hole (not shown) therethrough, the frame 301 further includes a fastening member 3014, the fastening member 3014 is screwed with the threaded hole, when the fastening member 3014 rotates by a predetermined angle, the fastening member 3014 abuts against or separates from the supporting member 3012, and when the fastening member 3014 abuts against the supporting member 3012 and presses against the wall surface of the supporting member 3012, the angle of the rotary table 3011 is fixed.

Further, since the bending angles of the ends of the double-row pipelines with different pitches are different, in order to improve the versatility of the welding fixture, so as to adapt to the double-row pipelines with various specifications, as shown in fig. 3, the top surface of the support 401 is provided with two mounting grooves 4011, and each mounting groove 4011 is fixedly provided with one extending component 402.

Specifically, as shown in fig. 3, each of the extending assemblies 402 includes an extending pipe 4021 and a flange 4022, one end of the extending pipe 4021 is fixedly connected with the flange 4022, and the fixing connection manner includes, but is not limited to, welding, the other end of the extending pipe 4021 extends into the corresponding pipe body 10 and is attached to the hole wall of the pipe body 10, and the flange 4022 is placed in the mounting groove 4011 and is fixedly connected with the support 401, and the fixing connection manner includes, but is not limited to, threaded connection.

It should be noted that, through will stretch into subassembly 402 setting up to detachable, when clamping the double engine cooling water pipe of different specifications, the processing personnel only need tear open and trade stretch into subassembly 402 to change corresponding stretch into subassembly 402, can make the stretch into subassembly 402 after changing stretch into in the double engine cooling water pipe of corresponding, confirm the angle of placement of body 10 and restrict its removal, realize detachable stretch into subassembly, the better advantage of commonality.

In summary, the double-row engine cooling water pipe and the welding clamp thereof according to the embodiment of the utility model are explained, which provide advantages of small overall occupation space, no mutual collision of two cooling water pipes and the like for the double-row engine cooling water pipe, and provide advantages of adjustable width, better universality and the like for the welding clamp.

It is worth mentioning that, in the embodiment of the utility model, the double-row engine cooling water pipe and the welding fixture thereof have simple structure, do not involve complex manufacturing process and expensive materials, and have higher economical efficiency. Meanwhile, for manufacturers, the double-row engine cooling water pipe and the welding clamp thereof provided by the utility model are easy to produce, have low cost, are more beneficial to control the production cost, and are further beneficial to product popularization and use.

It will be appreciated by persons skilled in the art that the embodiments of the utility model described above and shown in the drawings are by way of example only and are not limiting. The objects of the present utility model have been fully and effectively achieved. The functional and structural principles of the present utility model have been shown and described in the examples and embodiments of the utility model may be modified or practiced without departing from such principles.

Claims

1. A double row engine cooling water pipe which is characterized in that: the double-row engine cooling water pipe comprises

2. The double row engine cooling water pipe according to claim 1, wherein: each pipe body comprises a straight pipe combination, two transition parts and two bending parts, wherein the straight pipe combination comprises a first straight pipe part, a second straight pipe part and a third straight pipe part, the second straight pipe part is positioned between the first straight pipe part and the third straight pipe part, two ends of the second straight pipe part are respectively connected with the two transition parts, two bending parts are respectively positioned at two ends of the pipe body, and the straight pipe combination is positioned between the two bending parts.

3. The double row engine cooling water pipe according to claim 2, wherein: each connecting piece all includes two laminating portions and a connecting portion, laminating portion with body one-to-one, each laminating portion all has a cambered surface, have a plurality of connecting hole on the connecting portion, work as the connecting piece with two when the body welds, the cambered surface with the corresponding body laminating of body.

4. A welding fixture for clamping the double-row engine cooling water pipe as set forth in claim 2 or 3, characterized in that: the welding jig includes

5. The welding jig according to claim 4, wherein: the frame body comprises a rotary table and a supporting piece, the rotary table is rotatably installed on the supporting piece, and the fixing piece and the moving piece are both arranged on the rotary table.

6. The welding jig according to claim 5, wherein: the rotary table is provided with a chute, one end of the chute is abutted to the side wall of the fixing piece along the chute, and the moving piece is arranged in the chute in a sliding manner.

7. The welding jig according to claim 6, wherein: the clamping device further comprises a rotating piece, the rotating piece is rotatably installed on the rotary table, the rotating piece is located below the sliding groove, and the rotating piece is in spiral transmission connection with the moving piece.

8. The welding jig according to claim 5, wherein: the rotating disc is provided with a through threaded hole, the frame body further comprises a fastening piece, the fastening piece is in threaded connection with the threaded hole, and when the fastening piece rotates for a preset angle, the fastening piece abuts against or is separated from the supporting piece.

9. The welding jig according to claim 4, wherein: the top surface of the support is provided with two mounting grooves, and each mounting groove is internally and fixedly provided with one extending component.

10. The welding jig according to claim 9, wherein: each extending component comprises an extending pipe and a flange, one end of the extending pipe is fixedly connected with the flange, the other end of the extending pipe extends into the corresponding pipe body and is attached to the hole wall of the pipe body, and the flange is arranged in the mounting groove and is fixedly connected with the support.