A new energy automobile pipeline welding positioning device

Abstract

The application discloses a welding positioning device for new energy automobile pipeline and belongs to the field of welding devices, which comprises a base, side plates fixedly connected to the upper surface of the base, two servo motors fixedly connected to one side of the side plate, a bidirectional threaded rod fixedly connected to the output end of the servo motor, and internally-threaded sleeve blocks symmetrically and threadedly connected to the outer surface of the bidirectional threaded rod. The sealing plug can be pushed into the other end of the pipeline, so that the sealing plug seals the two ends of the pipeline. After welding, the air pump is started to work, the air pump delivers airflow to the inside of the pipeline through the rotary joint and the air pipe, so that the inside of the pipeline forms gas flow, the gas flow carries away the residual heat of the welding position, the airflow is discharged outside from the air pipe and the rotary joint at the other end, the pipeline can be welded in a shorter time, and the efficiency of the pipeline in the whole machining process is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of welding equipment, more particularly, to a welding positioning device for new energy automobile pipeline. BACKGROUND

[0002] With the continuous development of the new energy automobile industry, the quality requirements of various aspects of new energy automobiles are higher, especially the new energy automobile pipeline directly affects the service life and safety of new energy automobiles, and the precision of the new energy automobile pipeline is particularly important. The pipe material of the new energy automobile pipeline is generally a steel pipe.

[0003] The existing oil pipeline needs to be welded by welding equipment before use. However, the existing pipeline welding method is generally manual welding. However, it is not convenient to rotate the pipeline during manual welding, so the welding efficiency is low. During the pipeline welding process, dust and debris may exist at the welding site, which will affect the welding effect.

[0004] The Chinese patent application No. CN119237998A discloses a petroleum chemical pipeline engineering welding device with auxiliary positioning, which clamps and fixes two pipelines by a clamping mechanism, rotates the pipelines by a transmission motor after clamping is completed, and finally welds the pipeline connection by a welding mechanism to solve the problem that it is not convenient to rotate the pipeline during manual welding. However, a large amount of residual heat exists in the welded pipeline, which requires the steel pipe to be naturally cooled for a long time, and cannot be processed in time, prolonging the time of the steel pipe in the entire processing flow. SUMMARY

[0005] In view of the problems in the prior art, the present application aims to provide a welding positioning device for new energy automobile pipeline.

[0006] To solve the above problems, the present application adopts the following technical solution.

[0007] A welding positioning device for new energy automobile pipeline, comprising a base, two side plates are fixedly connected to the upper surface of the base, two servo motors are fixedly connected to one side of the side plate, a double-thread rod is fixedly connected to the output end of the servo motor, an internally threaded sleeve block is symmetrically threadedly connected to the outer surface of the double-thread rod, two groups of fixed rods are fixedly connected to the front and rear sides of the top of the base, a guide wheel is fixedly connected to the top of the fixed rod, and a heat dissipation assembly for heat dissipation and position conversion is arranged on one side of the two internally threaded sleeve blocks.

[0008] The heat dissipation assembly includes a moving plate fixed on the side of the two internally threaded sleeve blocks close to each other, one side of the moving plate is fixedly connected with an air pump, the side close to each other of the two moving plates is rotatably connected with a rotary joint, one side of the rotary joint is rotatably provided with a circular plate, one side of the circular plate is fixedly connected with a sealing plug, the inside of the circular plate is fixedly connected with a breather pipe, the edge of the side of the circular plate away from the sealing plug is fixedly connected with a ring gear, the other moving plate is provided with an air tightness detection assembly away from the circular plate.

[0009] Further, the bottom of one side of the moving plate close to the air pump is fixedly connected with a first drive motor, the output end of the first drive motor is fixedly connected with a drive gear, and the drive gear and the ring gear are meshed with each other.

[0010] Further, one side of the breather pipe penetrates the inside of the sealing plug, the breather pipe and the inside of the rotary joint are in communication with each other, and the output end of the air pump and the inside of the rotary joint are in communication with each other.

[0011] Further, the middle of the top of the base is fixedly connected with a slide rail in symmetry, the inside of the slide rail is slidably connected with a slide rod, the top of the slide rod is fixedly connected with the bottom of the moving plate, the guide wheels are provided in four groups, and the four groups of guide wheels are arranged in two rows, two groups are arranged on each side, and the guide wheels are arranged in an inclined manner.

[0012] Further, the air tightness detection assembly includes a double cooling assembly fixed on the communicating pipe on one side of the moving plate and arranged on the clamping assembly, one side of the communicating pipe is fixedly connected with a cylinder, the inside of the cylinder is rotatably connected with a rubber plug, the inside of the rubber plug is provided with a three-way port, the top of the rubber plug is fixedly connected with a rotating rod, the outer surface of the cylinder is fixedly connected with an air outlet pipe in symmetry, and the outer surface of the communicating pipe is fixedly connected with a pressure detector.

[0013] Further, the two ends of the communicating pipe are in communication with the inside of the rotary joint and the cylinder respectively, the top of the rotating rod extends out of the inside of the cylinder, the three-way port is T-shaped, and the air outlet pipe and the inside of the cylinder are in communication with each other.

[0014] Further, the double cooling assembly includes a gas jet port fixed on the clamping assembly, a plurality of gas jet ports are formed in the outer surface of the air distribution pipe, the opposite surface of the gas jet port and the outer surface of the air distribution pipe are fixedly connected with a connecting hose, and the other end of the connecting hose is connected with the air outlet pipe.

[0015] Further, the middle of the upper surface of the base front and rear is provided with a clamping assembly, the clamping assembly comprises a mounting plate fixed in the middle of the upper surface of the base front and rear, the inside of the mounting plate is fixedly connected with a hydraulic push rod, the output end of the hydraulic push rod is fixedly connected with a U-shaped plate, one side of the U-shaped plate is fixedly connected with an arc-shaped clamping plate, the four corners of the inner side of the arc-shaped clamping plate are provided with rollers, the inside of the arc-shaped clamping plate is provided with a square port, the inner surface of the U-shaped plate is fixedly connected with a second driving motor, the output end of the second driving motor is fixedly connected with a rotating sleeve, the inside of the rotating sleeve is slidably provided with a rectangular rod, one side of the rectangular rod is fixedly connected with a polishing block, the inside of the second driving motor is provided with a spring, the spring is in a compressed state, the inner top of the square port is provided with a gas jet, and the top of the U-shaped plate is provided with a limiting assembly.

[0016] Further, the limiting assembly comprises a slot formed in the top of the U-shaped plate, a moving rod fixed at the top and the bottom of the rectangular rod, and two sliding grooves formed on the outer surface of the rotating sleeve, the top of the U-shaped plate is fixedly connected with a fixed block, the inside of the fixed block is rotatably connected with a threaded rod, the outer surface of the threaded rod is threadedly connected with a limiting rod, the inside of the limiting rod is slidably provided with an extension rod, one side of the extension rod is fixedly connected with an annular sliding rail, and one side of the top of the U-shaped plate is fixedly connected with a scale.

[0017] Further, the limiting rod slides in the inside of the slot, the moving rod slides in the inside of the sliding groove, and the top of the moving rod extends into the inside of the annular sliding rail and slidably matches with each other.

[0018] Compared with the prior art, the beneficial effects of the present application are:

[0019] 1. The heat dissipation assembly is arranged, the sealing plug is pushed into the other end of the pipeline, the sealing plug seals one end of the pipeline, after welding, the air pump is started to work, the air flow is conveyed into the inside of the pipeline through the rotary joint and the air pipe, the air flow in the pipeline is formed, the air flow carries away the residual heat of the welding position, the air flow is discharged outside from the air pipe and the rotary joint at the other end, so that the time spent in welding the pipeline is shorter, and the efficiency of the entire processing flow of the pipeline is improved.

[0020] 2. The scheme is provided with the air tightness detection assembly, the air pump transports the airflow to the inside of the pipeline through the rotary joint and the breather pipe, the internal air pressure of the pipeline is continuously increased, the value on the pressure detector is observed, the value is rapidly and continuously increased, the welding quality of the welding position is good, there is no air leakage, there is no weld at the welding position, so that the weld at the welding position can be quickly detected, when the value on the pressure detector remains a stable value or the value slowly rises, it is indicated that there is a gap at the welding position, and the welding needs to be re-performed, so that the welded pipeline can be quickly detected.

[0021] 3. The scheme is provided with the double cooling assembly, the airflow in the outlet pipe enters the inside of the air distribution pipe through the connecting hose, and the airflow is sprayed out through the air jet, the surface of the welding position can be blown, the heat of the welding position is blown away, the cooling time is effectively shortened, the welding quality is further improved, and the air jet can blow the surface of the polished pipeline, and the debris can be blown off from the surface of the pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic view of the application;

[0023] Figure 2 It is a circular plate structure schematic view of the application;

[0024] Figure 3 It is a structure schematic view of the air tightness detection assembly of the application;

[0025] Figure 4 It is a sectional view structure schematic view of the air tightness detection assembly of the application;

[0026] Figure 5 It is a structure schematic view of the clamping assembly of the application;

[0027] Figure 6 It is a structure schematic view of the limiting assembly of the application;

[0028] Figure 7 It is an A enlarged view of the application; Figure 6

[0029] Figure 8 It is a sectional view of the rotating sleeve of the application.

[0030] Explanation of reference numerals in the drawing:

[0031] 1, base; 2, side plate; 3, servo motor;

[0032] 4, heat dissipation assembly; 41, moving plate; 42, first driving motor; 43, air pump;

[0033] ​44, air tightness detection assembly; 441, cylinder; 442, air outlet pipe; 443, rotating rod; 444, communication pipe; 445, pressure detector; 446, tee; 447, rubber plug;

[0034] 448, double cooling assembly; 4481, air outlet; 4482, air distribution pipe; 4483, connecting hose;

[0035] 45, ring rack; 46, rotary joint; 47, circular plate; 48, sealing plug; 49, air pipe; 410, drive gear;

[0036] 5, clamping assembly; 51, mounting plate; 52, hydraulic push rod; 53, U-shaped plate; 54, arc clamping plate; 55, rotating sleeve; 56, rectangular rod; 57, polishing block; 58, second drive motor;

[0037] 59, limiting assembly; 591, fixed block; 592, threaded rod; 593, limiting rod; 594, slot; 595, scale; 596, moving rod; 597, annular slide rail; 598, telescopic rod; 599, sliding groove;

[0038] 510, square port; 511, spring; 512, roller;

[0039] 6, fixed rod; 7, internally threaded sleeve block; 8, bidirectional threaded rod; 9, slide rail; 10, slide rod; 11, guide wheel. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of the present application.

[0041] Please refer to Figures 1 to 8 A new energy automobile pipeline welding positioning device, including base 1, the upper surface of base 1 is fixedly connected with side plate 2 on both sides, one side of side plate 2 is fixedly connected with two servo motors 3, the output end of servo motor 3 is fixedly connected with bidirectional threaded rod 8, the outer surface of bidirectional threaded rod 8 is symmetrically screwed with internally threaded sleeve block 7, two groups of fixed rods 6 are fixed on the front and rear sides of the top of base 1, the top of fixed rod 6 is fixedly connected with guide wheel 11, the side of two internally threaded sleeve blocks 7 close to each other is provided with heat dissipation assembly 4 for heat dissipation and position conversion.

[0042] As Figures 1-2As shown, the heat dissipation assembly 4 includes a moving plate 41 fixed on the side of the two internally threaded sleeve blocks 7 close to each other, one side of one moving plate 41 is fixedly connected with an air pump 43, the side close to each other of the two moving plates 41 is rotatably connected with a rotary joint 46, one side of the rotary joint 46 is rotatably provided with a circular plate 47, one side of the circular plate 47 is fixedly connected with a sealing plug 48, the inside of the circular plate 47 is fixedly connected with a breather pipe 49, the edge of the side away from the sealing plug 48 of the circular plate 47 is fixedly connected with an annular rack 45, the other moving plate 41 is provided with an air tightness detection assembly 44 away from the circular plate 47.

[0043] The bottom of the side close to the air pump 43 of one moving plate 41 is fixedly connected with a first drive motor 42, the output end of the first drive motor 42 is fixedly connected with a drive gear 410, the drive gear 410 and the annular rack 45 are meshed with each other.

[0044] One side of the breather pipe 49 penetrates the inside of the sealing plug 48, the breather pipe 49 and the inside of the rotary joint 46 are in communication with each other, the output end of the air pump 43 and the inside of the rotary joint 46 are in communication with each other.

[0045] The middle of the top of the base 1 is fixedly connected with a slide rail 9 in a symmetrical manner, the inside of the slide rail 9 is slidably connected with a slide rod 10, the top of the slide rod 10 is fixedly connected with the bottom of the moving plate 41, four groups of guide wheels 11 are provided, the four groups of guide wheels 11 are arranged on both sides, two groups of guide wheels 11 are arranged on each side, and the guide wheels 11 are arranged in an inclined manner.

[0046] When welding the automobile pipeline, the two pipelines are placed on the two groups of guide wheels 11 respectively, at this time the servo motor 3 is started to drive the bidirectional threaded rod 8 to rotate, the bidirectional threaded rod 8 drives the moving plate 41 to move through the internally threaded sleeve block 7, so that the two moving plates 41 are close to each other, when the moving plate 41 gradually contacts the pipeline, the sealing plug 48 pushes the pipeline to move on the two guide wheels 11, one end of the two pipelines is butt jointed, at this time the moving plate 41 continues to move, the sealing plug 48 is pushed into the other end of the pipeline, so that the sealing plug 48 seals one end of the pipeline, the welding gun is used to weld the connection of the pipeline, at the same time the first drive motor 42 drives the drive gear 410 to rotate, the drive gear 410 drives the circular plate 47 to rotate through the annular rack 45, so as to drive the two pipelines to rotate at a constant speed, the welding gun uniformly welds the connection;

[0047] After welding, the air pump 43 is started to work, the air flow is delivered to the inside of the pipeline through the rotary joint 46 and the breather pipe 49, so that the inside of the pipeline forms the flow of gas, the flow of gas carries away the residual heat of the welding part, the air flow is discharged to the outside through the breather pipe 49 and the rotary joint 46 on the other end, which can make the pipeline spend less time when welding, and improve the efficiency of the pipeline in the whole processing flow.

[0048] As Figures 3-4 The airtightness detection assembly 44 includes a double cooling assembly 448 fixed on the communicating pipe 444 on one side of the moving plate 41 and arranged on the clamping assembly 5, one side of the communicating pipe 444 is fixedly connected with a cylinder 441, the inside of the cylinder 441 is rotatably connected with a rubber plug 447, the inside of the rubber plug 447 is provided with a three-way port 446, the top of the rubber plug 447 is fixedly connected with a rotating rod 443, the outer surface of the cylinder 441 is fixedly connected with an air outlet pipe 442 in a symmetrical manner, and the outer surface of the communicating pipe 444 is fixedly connected with a pressure detector 445.

[0049] The two ends of the communicating pipe 444 are in communication with the rotating joint 46 and the inside of the cylinder 441 respectively, the top of the rotating rod 443 extends out of the inside of the cylinder 441, the three-way port 446 is T-shaped, and the air outlet pipe 442 is in communication with the inside of the cylinder 441.

[0050] After the pipeline is welded, the quality of the welded pipeline needs to be detected, whether there is a crack at the welded position of the pipeline needs to be detected, and the pipeline with a crack needs to be re-welded to avoid reducing the service life of the pipeline due to the existence of the gap;

[0051] Before cooling after welding, rotating the rotating rod 443 to drive the rubber plug 447 to rotate, rotating the rubber plug 447 by one hundred and eighty degrees to block the communicating pipe 444, at this time, starting the air pump 43 to transport air flow into the inside of the pipeline through the rotating joint 46 and the air pipe 49, so that the air pressure in the inside of the pipeline is constantly increased, by observing the value on the pressure detector 445, the value is rapidly and constantly increased, indicating that the welding quality of the welded position is good, there is no air leakage, and there is no welding seam at the welded position, so that the welding seam of the welded position can be quickly detected, when the value on the pressure detector 445 remains a stable value or the value slowly rises, it indicates that there is a gap at the welded position, and the welding needs to be re-performed, so that the welded pipeline can be quickly detected.

[0052] As Figures 5-6 The double cooling assembly 448 includes a gas injection port 4481 fixed on the clamping assembly 5, a plurality of gas injection ports 4481 are formed in the outer surface of a gas distribution pipe 4482, a connecting hose 4483 is fixedly connected to the opposite surface of the gas injection port 4481 on the outer surface of the gas distribution pipe 4482, and the other end of the connecting hose 4483 is connected with the air outlet pipe 442.

[0053] When cooling, rotating the rotating rod 443 drives the rubber plug 447 to rotate 180 degrees, so that the communication pipe 444 is in communication with the inside of the three-way port 446. When the airflow in the pipeline enters the communication pipe 444, it enters the inside of the three-way port 446, and the airflow in the three-way port 446 enters the inside of the two air outlet pipes 442. The airflow in the air outlet pipe 442 enters the inside of the air distribution pipe 4482 through the connecting hose 4483, and is sprayed out through the air jet 4481. The air jet 4481 can blow air to the outer surface of the welded part to blow away the heat of the welded part, effectively shorten the cooling time, and further improve the welding quality.

[0054] As shown in Figures 5-8 The base 1 upper surface front and rear side of the middle part is provided with a clamping assembly 5, the clamping assembly 5 includes a mounting plate 51 fixed on the base 1 upper surface front and rear side of the middle part, the inside of the mounting plate 51 is fixedly connected with a hydraulic push rod 52, the output end of the hydraulic push rod 52 is fixedly connected with a U-shaped plate 53, one side of the U-shaped plate 53 is fixedly connected with an arc-shaped clamping plate 54, the four corners of the inner side of the arc-shaped clamping plate 54 are provided with a roller 512, the inside of the arc-shaped clamping plate 54 is provided with a square port 510, the inner surface of the U-shaped plate 53 is fixedly connected with a second drive motor 58, the output end of the second drive motor 58 is fixedly connected with a rotating sleeve 55, the inside of the rotating sleeve 55 is slidably provided with a rectangular rod 56, one side of the rectangular rod 56 is fixedly connected with a polishing block 57, the inside of the second drive motor 58 is provided with a spring 511, the spring 511 is in a compressed state, the inner top of the square port 510 is provided with an air jet 4481, and the top of the U-shaped plate 53 is provided with a limiting assembly 59.

[0055] Before welding, in order to ensure the quality during welding, the welding part needs to be polished to remove the surface oxidation layer. After the pipeline is butt jointed, the hydraulic push rod 52 is started to drive the two arc-shaped clamping plates 54 to approach each other, the arc-shaped clamping plate 54 drives the roller 512 to approach the surface of the pipeline and clamps the pipeline. The clamping of the two arc-shaped clamping plates 54 also plays a certain alignment role to avoid the connection of the pipeline from being offset. At this time, the polishing block 57 is in contact with the surfaces of the two pipelines under the action of the spring 511. The second drive motor 58 is started to drive the polishing block 57 to rotate through the rotating sleeve 55 and the rectangular rod 56. The oxidation layer on the surface of the pipeline can be removed. At the same time, the first drive motor 42 is started to drive the pipeline to rotate through the transmission belt, so that one circle of the pipeline can be polished, and the airflow blown out by the air jet 4481 can blow off the metal scraps attached to the surface of the pipeline after polishing, ensuring the cleanliness of the polishing part and improving the welding quality.

[0056] As shown in Figures 6-8As shown, the limiting assembly 59 comprises a slot 594 opened in the top of the Z-shaped plate 53, a moving rod 596 fixed at the top and bottom of the rectangular rod 56, and two sliding grooves 599 opened on the outer surface of the rotating sleeve 55. The top of the Z-shaped plate 53 is fixedly connected with a fixed block 591, the inside of the fixed block 591 is rotatably connected with a threaded rod 592, the outer surface of the threaded rod 592 is threadedly connected with a limiting rod 593, the inside of the limiting rod 593 is slidably provided with an extension rod 598, one side of the extension rod 598 is fixedly connected with an annular sliding rail 597, and one side of the top of the Z-shaped plate 53 is fixedly connected with a scale 595.

[0057] The limiting rod 593 slides in the slot 594, the moving rod 596 slides in the sliding groove 599, and the top of the moving rod 596 extends into the annular sliding rail 597 and slidably matches with each other.

[0058] However, when polishing the pipeline to remove the oxide layer, it is necessary to ensure the appropriate polishing amount to avoid excessive polishing, which will affect the overall quality of the pipeline and the quality of the subsequent welding. At this time, rotating the threaded rod 592 to move the limiting rod 593 back and forth, adjusting the position of the limiting rod 593 according to the scale on the scale 595, the scale of the scale 595 indicates the distance between the limiting rod 593 and the annular sliding rail 597, which is also the polishing feed amount. As the polishing proceeds, the spring 511 will push the rectangular rod 56 out of the inside of the rotating sleeve 55, and the rectangular rod 56 will drive the annular sliding rail 597 to move synchronously through the moving rod 596. When the annular sliding rail 597 and the limiting rod 593 are in close contact with each other, the rectangular rod 56 cannot continue to move, so that the polishing block 57 no longer moves, thereby ensuring that the polishing feed amount of the polishing block 57 is consistent and excessive polishing does not occur.

[0059] Method for use: place two pipelines on the guide wheels 11 and align them, start the hydraulic push rod 52 to drive the two arc-shaped clamps 54 to move closer to each other, so that the four rollers 512 come into contact with the pipelines, further improving the accuracy of the connection of the two pipelines, start the second drive motor 58, rotate the polishing block 57 through the rotating sleeve 55 and the rectangular rod 56, and remove the oxide layer of the pipeline. At the same time, start the first drive motor 42 to drive the pipeline to rotate through the transmission belt, so that one circle of the pipeline can be polished, and the rotating pipeline can realize overall welding of the pipeline.

[0060] After the welding is finished, before the cooling is carried out, the rotating rod 443 is rotated to drive the rubber plug 447 to rotate, the rubber plug 447 is rotated by one hundred and eighty degrees, the rubber plug 447 is sealed to the communicating pipe 444, at this time, the air pump 43 is started, the air flow is transported to the inside of the pipeline through the rotating joint 46 and the air pipe 49, the air pressure in the inside of the pipeline is continuously increased, the value on the pressure detector 445 is observed, the value is rapidly and continuously increased, the welding quality of the welding position is good;

[0061] The rotating rod 443 is reversed to drive the rubber plug 447 to rotate by one hundred and eighty degrees, the three-way port 446 and the inside of the communicating pipe 444 are communicated with each other, the air pump 43 transports the air flow to the inside of the pipeline through the rotating joint 46 and the air pipe 49, the air flow in the inside of the pipeline is formed, the residual heat of the welding position is taken away by the air flow, the air flow is discharged to the outside from the air pipe 49 and the rotating joint 46 at the other end.

[0062] When the air flow in the inside of the pipeline enters into the communicating pipe 444 and then enters into the inside of the three-way port 446, the air flow in the inside of the three-way port 446 enters into the inside of the two air outlet pipes 442, the air flow in the inside of the air outlet pipe 442 enters into the inside of the air distribution pipe 4482 through the connecting hose 4483, the air flow is sprayed through the air outlet 4481, the air is blown to the outer surface of the welding position, the heat of the welding position is blown away, the cooling time is effectively shortened, and the welding quality is further improved.

[0063] The above is only the preferred embodiment of the present application; the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A new energy vehicle pipeline welding positioning equipment, comprising a base (1), the upper surface of the base (1) is fixedly connected with side plates (2) on both sides, one side of the side plate (2) is fixedly connected with two servo motors (3), the output end of the servo motor (3) is fixedly connected with a bidirectional threaded rod (8), the outer surface of the bidirectional threaded rod (8) is symmetrically connected with internally threaded sleeve blocks (7), the top of the base (1) is fixed with two groups of fixed rods (6) on the front and rear sides, and the top of the fixed rod (6) is fixedly connected with a guide wheel (11). characterized in that Two internally threaded sleeve blocks (7) are provided with heat dissipation assemblies (4) on the side close to each other for heat dissipation and position conversion, and the middle of the upper surface of the base (1) is provided with clamping assemblies (5) on the front and rear sides. The heat dissipation assembly (4) comprises a moving plate (41) fixed on the side close to each other of the two internally threaded sleeve blocks (7), one side of one moving plate (41) is fixedly connected with an air pump (43), the side close to each other of the two moving plates (41) is rotatably connected with a rotary joint (46), one side of the rotary joint (46) is rotatably provided with a circular plate (47), one side of the circular plate (47) is fixedly connected with a sealing plug (48), the inside of the circular plate (47) is fixedly connected with an air pipe (49), the edge of the side away from the sealing plug (48) of the circular plate (47) is fixedly connected with an annular rack (45), and the other moving plate (41) is provided with an airtightness detection assembly (44) on the side away from the circular plate (47). The airtightness detection assembly (44) comprises a communication pipe (444) fixed on one side of the moving plate (41) and a double cooling assembly (448) provided on the clamping assembly (5), one side of the communication pipe (444) is fixedly connected with a cylinder (441), the inside of the cylinder (441) is rotatably connected with a rubber plug (447), the inside of the rubber plug (447) is provided with a three-way port (446), the top of the rubber plug (447) is fixedly connected with a rotating rod (443), the outer surface of the cylinder (441) is fixedly connected with an air outlet pipe (442), and the outer surface of the communication pipe (444) is fixedly connected with a pressure detector (445). The double cooling assembly (448) comprises a gas distribution pipe (4482) fixed on the clamping assembly (5), a plurality of air injection ports (4481) are formed in the outer surface of the gas distribution pipe (4482), the outer surface of the gas distribution pipe (4482) and the opposite side of the air injection port (4481) are fixedly connected with a connecting hose (4483), and the other end of the connecting hose (4483) is connected with the air outlet pipe (442).

2. The welding positioning device for new energy vehicle pipeline according to claim 1, characterized in that: One moving plate (41) is fixedly connected with a first driving motor (42) at the bottom of the side close to the air pump (43), the output end of the first driving motor (42) is fixedly connected with a driving gear (410), and the driving gear (410) and the annular rack (45) are meshed with each other.

3. The welding positioning device for new energy vehicle pipeline according to claim 2, characterized in that: One side of the vent pipe (49) penetrates the inside of the sealing plug (48), the vent pipe (49) and the inside of the rotary joint (46) are in communication, the output end of the air pump (43) and the inside of the rotary joint (46) are in communication.

4. The welding positioning device for new energy vehicle pipeline according to claim 3, characterized in that: The middle of the top of the base (1) is fixedly connected with a sliding rail (9) in a symmetrical manner, a sliding rod (10) is slidably connected in the inside of the sliding rail (9), and the top of the sliding rod (10) is fixedly connected with the bottom of a moving plate (41). Four groups of guide wheels (11) are arranged, and the four groups of guide wheels (11) are arranged in two rows on both sides, and two groups of guide wheels (11) are arranged on each side. The guide wheels (11) are arranged in an inclined manner.

5. The welding positioning device for new energy vehicle pipeline according to claim 4, characterized in that: Both ends of the communication pipe (444) are in communication with the inside of the rotary joint (46) and the cylinder (441) respectively, the top of the rotating rod (443) extends out of the inside of the cylinder (441), the three-way port (446) is T-shaped, and the air outlet pipe (442) is in communication with the inside of the cylinder (441).

6. The welding positioning device for new energy vehicle pipeline according to claim 1, characterized in that: The clamping assembly (5) comprises a mounting plate (51) fixed to the middle of the front and rear sides of the upper surface of the base (1), a hydraulic push rod (52) fixedly connected in the inside of the mounting plate (51), a U-shaped plate (53) fixedly connected to the output end of the hydraulic push rod (52), an arc-shaped clamping plate (54) fixedly connected to one side of the U-shaped plate (53), four rollers (512) arranged at the four corners of the inner side of the arc-shaped clamping plate (54), a square port (510) arranged in the inside of the arc-shaped clamping plate (54), a second driving motor (58) fixed to the inner surface of the U-shaped plate (53), a rotating sleeve (55) fixedly connected to the output end of the second driving motor (58), a rectangular rod (56) slidably arranged in the inside of the rotating sleeve (55), a polishing block (57) fixedly connected to one side of the rectangular rod (56), a spring (511) arranged in the inside of the second driving motor (58), the spring (511) being in a compressed state, a gas jet port (4481) arranged at the inner top of the square port (510), and a limiting assembly (59) arranged at the top of the U-shaped plate (53).

7. The welding positioning device for new energy vehicle pipeline according to claim 6, characterized in that: The limiting assembly (59) comprises a slot (594) formed in the inner top of the U-shaped plate (53), a moving rod (596) fixed to the top and the bottom of the rectangular rod (56), and two sliding grooves (599) formed on the outer surface of the rotating sleeve (55). The top of the U-shaped plate (53) is fixedly connected with a fixed block (591), the inside of the fixed block (591) is rotatably connected with a threaded rod (592), the outer surface of the threaded rod (592) is threadedly connected with a limiting rod (593), the inside of the limiting rod (593) is slidably provided with an extension rod (598), one side of the extension rod (598) is fixedly connected with an annular sliding rail (597), and one side of the top of the U-shaped plate (53) is fixedly connected with a scale (595).

8. The welding positioning device for new energy vehicle pipeline according to claim 7, characterized in that: The limiting rod (593) slides inside the slot (594), the moving rod (596) slides inside the sliding groove (599), and the top of the moving rod (596) extends into the annular sliding rail (597) and is slidably matched with each other.

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