Welding device convenient to maintain and used for production of sealed gas pipeline compensator

Abstract

The invention discloses a sealing type gas pipeline compensator production welding device convenient to maintain, and relates to the technical field of welding. The convenient-to-maintain welding device for production of the sealed gas pipeline compensator comprises a welding table, and a welding frame driven by a servo motor is assembled in the welding table. According to the sealing type gas pipeline compensator production welding device convenient to maintain, after preliminary clamping of a welded object is completed, a servo motor and an electric telescopic rod are started, a welding head is driven to move, corresponding welding operation is conducted, and when the welding head rotates rapidly along with a welding frame, the welding head is driven to move; through cooperation of a gear ring, a gear, a rotating rod, a first hydraulic bin, a second elastic telescopic rod, a sliding block, an arc-shaped rod, a hydraulic device, a first stress rod and a first spring, an extrusion plate can apply extra force to a clamping plate, the clamping effect of the clamping plate on a welded object is improved, and therefore the stability of the device under the condition is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a welding device for producing a sealed gas pipeline compensator which is easy to maintain. Background Art

[0002] The welding device for the production of sealed gas pipeline compensators that is easy to maintain mainly involves welding technology, gas pipeline systems, and the production process of sealed compensators. In order to ensure the safety and stability of sealed gas pipeline compensators during use, the welding of their structures during the production process has extremely high requirements. The welding quality directly affects the sealing performance, pressure resistance, corrosion resistance and service life of the compensator, so it is very important to develop a welding device that is easy to maintain and efficient.

[0003] Chinese patent CN118106671B, authorized and announced on July 5, 2024, discloses a pipe connection device for exhaust gas treatment, which includes a working box, and a plurality of table legs are fixedly connected to the bottom of the working box. A square groove is provided at the center of the bottom of the inner wall of the working box. The clamping welding mechanism also includes a forward and reverse motor fixedly connected to both sides of the working box, and a threaded shaft is fixedly connected to the output end of the forward and reverse motor.

[0004] In the above application documents, the automatic welding machine is driven by a circular ring to rotate in a circular manner to weld the butted pipes. However, when the welding head of the device rotates rapidly to perform rapid welding operations, the welded parts may vibrate to a certain extent due to the rapid movement of the welding head, resulting in insufficient stability, thereby affecting the welding effect of the device. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a welding device for the production of a sealed gas pipeline compensator that is easy to maintain, which solves the problems raised in the above background technology. To achieve the above purpose, the present invention is implemented through the following technical solutions: A welding device for the production of a sealed gas pipeline compensator that is easy to maintain, comprising: A welding table, wherein a welding frame driven by a servo motor is installed inside the welding table, and a welding head driven by an electric telescopic rod is installed inside the welding frame; A reciprocating screw rod, the reciprocating screw rod is driven by a servo motor, the outer side of the reciprocating screw rod is connected to a clamping seat by means of a thread, and the side of the clamping seat is connected to a clamping plate by means of an elastic telescopic rod; A gear ring is fixedly connected to the outer side of the welding frame, a hydraulic device is installed on the side of the clamping seat, one end of the hydraulic device is slidably connected to a force-bearing rod 1, the other end of the hydraulic device is slidably connected to an extrusion plate, a spring 1 is installed on the top of the force-bearing rod 1, a transmission member is set between the gear ring and the force-bearing rod 1 for transmission, an adsorption assembly for adsorbing the compensator is installed on the outer side of the clamping plate, and a cleaning assembly for cleaning welding slag is installed on the top of the welding table.

[0006] Preferably, the transmission member includes a gear rotatably connected to the welding table, a rotating rod is fixedly connected to the side of the gear, a hydraulic chamber 1 is fixedly connected to the outer side of the rotating rod, a sliding block is slidably connected to the inside of the hydraulic chamber 1 by setting an elastic telescopic rod 2, and an arc rod is slidably connected to the side of the hydraulic chamber 1. Through the setting of the device, the extrusion plate can apply an additional force to the clamping plate, thereby improving the clamping effect of the clamping plate on the object to be welded, thereby improving the stability of the device in this case.

[0007] Preferably, the gear is located on the side of the gear ring and is in meshing state with the gear ring.

[0008] Preferably, the arc-shaped rod is located at the bottom of the stress-bearing rod one and is in contact with the stress-bearing rod one.

[0009] Preferably, the adsorption assembly includes a suction cup mounted on the side of the clamping plate and a rotating block rotatably connected to the clamping plate, one end of the rotating block is fixedly connected to a force-bearing rod 2, the other end of the rotating block is fixedly connected to a connecting rod, the side of the force-bearing rod 2 is equipped with a spring 2, the side of the suction cup is equipped with an air pressure chamber connected thereto, and the side of the air pressure chamber is slidably connected to a pull rod. By setting the adsorption assembly, the residual air between the suction cup and the object to be welded can be extracted into the air pressure chamber, thereby improving the adsorption effect of the suction cup and making the device more stable when used.

[0010] Preferably, one end of the second spring away from the second force-bearing rod is mounted on the inner wall of the clamping plate.

[0011] Preferably, the pull rod is located at the bottom of the connecting rod and is hinged to the connecting rod.

[0012] Preferably, the cleaning assembly includes a hydraulic chamber 2, a moving rod driven by a linear motor is installed on the top of the welding table, a cleaning brush is installed on the side of the moving rod, a pressing plate is slidably connected to the bottom of the hydraulic chamber 2, and a force plate is connected to the top of the cleaning brush by means of an elastic telescopic rod 3. By setting the cleaning assembly, the cleaning effect of the cleaning brush on the welding table can be improved, making the device easier to maintain.

[0013] Preferably, the hydraulic tank 2 is assembled at a side position of the hydraulic device and is connected to the hydraulic device.

[0014] Preferably, the force-bearing plate is located at the bottom of the pressure plate and is in contact with the pressure plate.

[0015] The present invention provides a welding device for producing a sealed gas pipeline compensator that is easy to maintain. It has the following beneficial effects: (1) The welding device for the production of sealed gas pipeline compensators that is easy to maintain, after completing the initial clamping of the object to be welded, starts the servo motor and the electric telescopic rod to drive the welding head to move and perform corresponding welding operations. When the welding head rotates rapidly with the welding frame, in conjunction with the gear ring, gear, rotating rod, hydraulic chamber 1, elastic telescopic rod 2, sliding block, arc rod, hydraulic device, force rod 1 and spring 1, the extrusion plate can apply an additional force to the clamping plate, thereby improving the clamping effect of the clamping plate on the object to be welded, thereby improving the stability of the device in this case.

[0016] (2) In the welding device for the production of sealed gas pipeline compensators which is easy to maintain, when the clamping plate squeezes the inner wall of the object to be welded, the suction cup moves to the inner wall of the object to be welded and performs a preliminary adsorption operation. When the extrusion plate moves toward the side close to the clamping plate, the rotating block, the second force-bearing rod, the connecting rod, the second spring and the pull rod are used to extract the remaining air between the suction cup and the object to be welded into the air pressure chamber, thereby improving the adsorption effect of the suction cup and making the device more stable when used.

[0017] (3) The welding device for the production of sealed gas pipeline compensators that is easy to maintain uses a linear motor to drive a moving rod driven by the linear motor to move back and forth in the horizontal direction. When the pressure in the hydraulic device increases, the cleaning effect of the cleaning brush on the welding table can be improved by cooperating with the hydraulic chamber 2, the moving rod, the pressure plate, the elastic telescopic rod 3 and the force plate, making the device easier to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of some parts of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of some parts of the present invention; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 It is a schematic diagram of the three-dimensional structure of some parts of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the adsorption component of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at B in the middle; Figure 8 It is a schematic diagram of the three-dimensional structure of the cleaning component of the present invention.

[0019] In the figure: 100, welding table; 200, reciprocating screw rod; 300, welding frame; 400, clamping seat; 500, elastic telescopic rod 1; 600, clamping plate; 700, welding head; 801, gear ring; 802, gear; 803, rotating rod; 804, hydraulic chamber 1; 805, elastic telescopic rod 2; 806, sliding block; 807, arc rod; 808, hydraulic device; 809, force rod 1; 810, extrusion plate; 811, spring 1; 900, adsorption assembly; 901, rotating block; 902, force-bearing rod 2; 903, connecting rod; 904, spring 2; 905, suction cup; 906, air pressure chamber; 907, pull rod; 1000, cleaning assembly; 1001, hydraulic compartment 2; 1002, moving rod; 1003, cleaning brush; 1004, pressing plate; 1005, elastic telescopic rod 3; 1006, force plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] For example, see Figure 1-Figure 5 , a welding device for producing a sealed gas pipeline compensator which is easy to maintain, comprising: A welding table 100, wherein a welding frame 300 driven by a servo motor is installed inside the welding table 100, and a welding head 700 driven by an electric telescopic rod is installed inside the welding frame 300; The reciprocating screw rod 200 is driven by a servo motor. The outer side of the reciprocating screw rod 200 is connected to a clamping seat 400 by setting a thread. The side of the clamping seat 400 is connected to a clamping plate 600 by setting an elastic telescopic rod 1 500. The clamping plate 600 is moved sideways so that the two clamping plates 600 compress the elastic telescopic rod 1 500 and move toward each other. Then, the object to be welded is placed at the outer side of the two clamping plates 600. The clamping plates 600 are released so that the clamping plates 600 are reset under the action of the elastic telescopic rod 1 500, and the inner wall of the object to be welded is squeezed to complete the preliminary clamping of the object to be welded. The outer side of the welding frame 300 is fixedly connected with a gear ring 801. After completing the preliminary clamping of the object to be welded, the servo motor and the electric telescopic rod are started to drive the welding head 700 on the welding frame 300 to move and perform the corresponding welding operation; when the welding head 700 rotates rapidly with the welding frame 300, the welding frame 300 can drive the gear ring 801 fixedly connected thereto to rotate rapidly.

[0022] The side of the clamping seat 400 is equipped with a hydraulic device 808, which is composed of two sections of hard hydraulic warehouse bodies and a section of hydraulic hose. One end of the hydraulic device 808 is slidably connected to a force rod 809, and the other end of the hydraulic device 808 is slidably connected to an extrusion plate 810. The top of the force rod 809 is equipped with a spring 811. The gear ring 801 and the force rod 809 are transmitted by setting a transmission member. The transmission member includes a gear 802 that is rotatably connected to the welding table 100. The gear 802 is located at the side of the gear ring 801 and is in a meshing state with the gear ring 801. The side of the gear 802 is fixedly connected with a rotating rod 803. When the gear ring 801 rotates rapidly, it can drive the gear 802 meshing with it to rotate rapidly, and the gear 802 drives the rotating rod 803 fixedly connected to it to rotate.

[0023] The outer side of the rotating rod 803 is fixedly connected with the hydraulic chamber 1 804, the interior of the hydraulic chamber 1 804 is slidably connected with the sliding block 806 by setting the elastic telescopic rod 2 805, and the side of the hydraulic chamber 1 804 is slidably connected with the arc rod 807. When the rotating rod 803 rotates rapidly, the hydraulic chamber 1 804 fixedly connected thereto can be driven to rotate rapidly, and the sliding block 806 in the hydraulic chamber 1 804 can stretch the elastic telescopic rod 2 805 under the action of centrifugal force and move along the inner wall of the hydraulic chamber 1 804, so that the pressure in the hydraulic chamber 1 804 increases, driving the arc rod 807 slidably connected to the hydraulic chamber 1 804 to move.

[0024] The arc rod 807 is located at the bottom of the stress-bearing rod 1 809 and is in contact with the stress-bearing rod 1 809 .

[0025] When the arc rod 807 moves, the arc rod 807 is in a rotating state and extends synchronously, thereby squeezing the stress rod 1 809 and driving the stress rod 1 809 to move toward the top, and the hydraulic device 808 slidably connected to the stress rod 1 809 increases the pressure in the hydraulic device 808, driving the extrusion plate 810 slidably connected to the hydraulic device 808 to move, and the extrusion plate 810 then moves to the side position of the clamping plate 600, fits with the clamping plate 600 and applies an additional force to the clamping plate 600. The clamping effect of the clamping plate 600 on the object to be welded is improved, thereby improving the stability of the device in this case.

[0026] After the welding operation is completed, the gear ring 801 stops rotating rapidly, and similarly, the hydraulic chamber 1 804 also stops rotating rapidly. At this time, the sliding block 806 loses the effect of centrifugal force and can be reset under the effect of the elastic telescopic rod 2 805. Similarly, the arc rod 807 is reset. At this time, the force-bearing rod 1 809 loses the effect of the arc rod 807 and can be reset under the effect of the spring 1 811, thereby resetting the device to facilitate the next activation of the device.

[0027] The outer side of the clamping plate 600 is equipped with a suction assembly 900 for sucking the compensator, and the top of the welding table 100 is equipped with a cleaning assembly 1000 for cleaning welding slag.

[0028] When in use, the clamping plate 600 is moved sideways so that the two clamping plates 600 compress the elastic telescopic rod 1 500 and move toward each other, and then the object to be welded is placed outside the two clamping plates 600, and the clamping plate 600 is released so that the clamping plate 600 is reset under the action of the elastic telescopic rod 1 500, and the inner wall of the object to be welded is squeezed to complete the preliminary clamping of the object to be welded, and then the servo motor and the electric telescopic rod are started to drive the welding head 700 on the welding frame 300 to move and perform the corresponding welding operation; when the welding head 700 As the welding frame 300 rotates rapidly, the welding frame 300 can drive the gear ring 801 fixedly connected thereto to rotate rapidly, so that the gear ring 801 drives the gear 802 meshing therewith to rotate rapidly, and the gear 802 drives the rotating rod 803 fixedly connected thereto to rotate, so that the rotating rod 803 drives the hydraulic chamber 1 804 fixedly connected thereto to rotate rapidly, and the sliding block 806 in the hydraulic chamber 1 804 can stretch the elastic telescopic rod 2 805 under the action of centrifugal force and move along the inner wall of the hydraulic chamber 1 804, so that the hydraulic chamber 1 804 is moved. The pressure in the pressure chamber 804 increases, driving the arc rod 807 slidably connected to the hydraulic chamber 804 to move. At this time, the arc rod 807 is in a rotating state and extends synchronously, thereby squeezing the force-bearing rod 809 and driving the force-bearing rod 809 to move to the top, and the hydraulic device 808 slidably connected to the force-bearing rod 809 increases the pressure in the hydraulic device 808, driving the extrusion plate 810 slidably connected to the hydraulic device 808 to move, and the extrusion plate 810 immediately moves to the side position of the clamping plate 600. It fits with the clamping plate 600 and applies an additional force to the clamping plate 600 at the same time; after the welding operation is completed, when the gear ring 801 stops rotating rapidly, similarly, the hydraulic chamber 1 804 also stops rotating rapidly. At this time, the sliding block 806 loses the effect of the centrifugal force and can be reset under the action of the elastic telescopic rod 2 805. Similarly, the arc rod 807 is reset. At this time, the force-bearing rod 1 809 loses the effect of the arc rod 807 and can be reset under the action of the spring 1 811, thereby resetting the device.

[0029] For example 2, please refer to Figure 1-Figure 7 On the basis of the first embodiment, the adsorption assembly 900 includes a suction cup 905 mounted on the side of the clamping plate 600 and a rotating block 901 rotatably connected to the clamping plate 600. The clamping plate 600 is reset under the action of the elastic telescopic rod 1 500, and the suction cup 905 mounted on the outer side of the clamping plate 600 moves to the inner wall of the welded object to perform a preliminary adsorption operation.

[0030] One end of the rotating block 901 is fixedly connected to the force-bearing rod 2 902, and the other end of the rotating block 901 is fixedly connected to the connecting rod 903. The side of the force-bearing rod 2 902 is equipped with a spring 2 904. The end of the spring 2 904 is far away from the force-bearing rod 2 902 and is installed on the inner wall of the clamping plate 600. After the initial adsorption operation, when the squeezing plate 810 moves toward the side close to the clamping plate 600, the force-bearing rod 2 902 can be squeezed, so that the force-bearing rod 2 902 compresses the spring 2 904 and moves, which can drive the rotating block 901 fixedly connected to the force-bearing rod 2 902 to rotate, so as to Figure 7 As shown in FIG. 1 , the rotating block 901 is in a clockwise rotating state, driving the connecting rod 903 fixedly connected to the rotating block 901 to rotate.

[0031] The side of the suction cup 905 is equipped with a gas pressure chamber 906 connected thereto, and the side of the gas pressure chamber 906 is slidably connected with a pull rod 907, which is located at the bottom of the connecting rod 903 and is hinged to the connecting rod 903. When the connecting rod 903 rotates, the pull rod 907 hinged thereto can be driven to move, and the pull rod 907 moves to the side away from the gas pressure chamber 906, and cooperates with the gas pressure chamber 906 slidably connected thereto, so that the remaining air between the suction cup 905 and the object to be welded can be extracted into the gas pressure chamber 906. The adsorption effect of the suction cup 905 is improved, making the device more stable when used.

[0032] When the squeezing plate 810 is reset, the force-bearing rod 2 902 loses the restriction of the squeezing plate 810 and can be reset under the action of the spring 2 904, so that the adsorption assembly 900 can be reset to facilitate the next activation of the adsorption assembly 900.

[0033] When in use, based on the first embodiment, the clamping plate 600 is reset under the action of the elastic telescopic rod 1 500, and the suction cup 905 assembled on the outside of the clamping plate 600 moves to the inner wall of the object to be welded to perform a preliminary adsorption operation. When the squeezing plate 810 moves to the side close to the clamping plate 600, the force-bearing rod 2 902 can be squeezed, so that the force-bearing rod 2 902 compresses the spring 2 904 and moves, which can drive the rotating block 901 fixedly connected to the force-bearing rod 2 902 to rotate, so as to Figure 7As shown in the figure, the rotating block 901 is in a clockwise rotating state, driving the connecting rod 903 fixedly connected to the rotating block 901 to rotate, and at this time the connecting rod 903 can drive the pull rod 907 hinged thereto to move, and the pull rod 907 moves to the side away from the air pressure chamber 906, and cooperates with the air pressure chamber 906 slidably connected thereto, so that the remaining air between the suction cup 905 and the object to be welded can be extracted into the air pressure chamber 906; when the extrusion plate 810 is reset, when the force-bearing rod 902 loses the restriction of the extrusion plate 810, it can be reset under the action of the spring 904, so that the adsorption component 900 can be reset.

[0034] For example 3, please refer to Figure 1-Figure 8 On the basis of the first and second embodiments, the cleaning assembly 1000 includes a hydraulic chamber 2 1001, which is mounted on the side of the hydraulic device 808 and is in communication with the hydraulic device 808. A moving rod 1002 driven by a linear motor is mounted on the top of the welding table 100, and a cleaning brush 1003 is mounted on the side of the moving rod 1002. The linear motor is activated to drive the moving rod 1002 driven by the linear motor to reciprocate in the horizontal direction, and the cleaning brush 1003 mounted on the side of the moving rod 1002 can be driven to reciprocate in the horizontal direction to clean the welding slag dropped on the welding table 100.

[0035] The bottom of the hydraulic chamber 1001 is slidably connected with a pressure plate 1004, and the top of the cleaning brush 1003 is connected with a force plate 1006 through an elastic telescopic rod 3 1005. The force plate 1006 is located at the bottom of the pressure plate 1004 and is in contact with the pressure plate 1004. When the pressure in the hydraulic device 808 increases, the pressure in the hydraulic chamber 1001 connected to the hydraulic device 808 increases accordingly, driving the pressure plate 1004 slidably connected to the hydraulic chamber 1001 to move downward. At this time, the pressure plate 1004 can squeeze the force plate 1006 and apply an additional force to the cleaning brush 1003 through the elastic telescopic rod 3 1005 connected to the force plate 1006. The cleaning effect of the cleaning brush 1003 on the welding table 100 is improved, making the device easier to maintain.

[0036] When in use, on the basis of Example 1 and Example 2, the linear motor is activated to drive the moving rod 1002 driven by the linear motor to reciprocate in the horizontal direction, which can drive the cleaning brush 1003 assembled on the side of the moving rod 1002 to reciprocate in the horizontal direction to clean the welding slag dropped onto the welding table 100, and when the pressure in the hydraulic device 808 increases, the pressure in the hydraulic warehouse 2 1001 connected to the hydraulic device 808 increases accordingly, driving the pressure plate 1004 slidingly connected to the hydraulic warehouse 2 1001 to move downward, at this time, the pressure plate 1004 can squeeze the force plate 1006, and apply an additional force to the cleaning brush 1003 through the elastic telescopic rod 3 1005 connected to the force plate 1006.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding device for producing a sealed gas pipeline compensator that is easy to maintain, characterized in that: include: A welding table (100), wherein a welding frame (300) driven by a servo motor is installed inside the welding table (100), and a welding head (700) driven by an electric telescopic rod is installed inside the welding frame (300); A reciprocating screw rod (200), the reciprocating screw rod (200) being driven by a servo motor, the outer side of the reciprocating screw rod (200) being connected to a clamping seat (400) by means of a thread, and the side surface of the clamping seat (400) being connected to a clamping plate (600) by means of an elastic telescopic rod (500); The outer side of the welding frame (300) is fixedly connected with a gear ring (801), the side of the clamping seat (400) is equipped with a hydraulic device (808), one end of the hydraulic device (808) is slidably connected with a force-bearing rod (809), the other end of the hydraulic device (808) is slidably connected with an extrusion plate (810), the top of the force-bearing rod (809) is equipped with a spring (811), the gear ring (801) and the force-bearing rod (809) are transmitted by setting a transmission member, the outer side of the clamping plate (600) is equipped with an adsorption component (900) for adsorbing the compensator, and the top of the welding table (100) is equipped with a cleaning component (1000) for cleaning welding slag.

2. According to claim 1, a welding device for producing a sealed gas pipeline compensator that is easy to maintain, characterized in that: The transmission member comprises a gear (802) rotatably connected to the welding table (100); a rotating rod (803) is fixedly connected to the side of the gear (802); a hydraulic bin 1 (804) is fixedly connected to the outside of the rotating rod (803); a sliding block (806) is slidably connected to the inside of the hydraulic bin 1 (804) by means of an elastic telescopic rod 2 (805); and an arc rod (807) is slidably connected to the side of the hydraulic bin 1 (804).

3. The welding device for producing a sealed gas pipeline compensator that is easy to maintain according to claim 2 is characterized in that: The gear (802) is located on the side of the gear ring (801) and is in meshing state with the gear ring (801).

4. The welding device for producing a sealed gas pipeline compensator that is easy to maintain according to claim 2 is characterized in that: The arc-shaped rod (807) is located at the bottom of the force-bearing rod one (809) and is in contact with the force-bearing rod one (809).

5. The welding device for producing a sealed gas pipeline compensator that is easy to maintain according to claim 2 is characterized in that: The adsorption assembly (900) includes a suction cup (905) mounted on the side of the clamping plate (600) and a rotating block (901) rotatably connected to the clamping plate (600), one end of the rotating block (901) is fixedly connected to a force-bearing rod 2 (902), the other end of the rotating block (901) is fixedly connected to a connecting rod (903), the side of the force-bearing rod 2 (902) is mounted with a spring 2 (904), the side of the suction cup (905) is mounted with an air pressure chamber (906) connected thereto, and the side of the air pressure chamber (906) is slidably connected with a pull rod (907).

6. The welding device for producing a sealed gas pipeline compensator that is easy to maintain according to claim 5 is characterized in that: One end of the second spring (904) away from the second force-bearing rod (902) is mounted on the inner wall of the clamping plate (600).

7. The welding device for producing a sealed gas pipeline compensator that is easy to maintain according to claim 5 is characterized in that: The pull rod (907) is located at the bottom of the connecting rod (903) and is in a hinged state with the connecting rod (903).

8. The welding device for producing a sealed gas pipeline compensator that is easy to maintain according to claim 5 is characterized in that: The cleaning assembly (1000) comprises a hydraulic bin 2 (1001); a moving rod (1002) driven by a linear motor is mounted on the top of the welding table (100); a cleaning brush (1003) is mounted on the side of the moving rod (1002); a pressure plate (1004) is slidably connected to the bottom of the hydraulic bin 2 (1001); and the top of the cleaning brush (1003) is connected to a force-bearing plate (1006) via an elastic telescopic rod 3 (1005).

9. The welding device for producing a sealed gas pipeline compensator that is easy to maintain according to claim 8 is characterized in that: The hydraulic tank 2 (1001) is mounted on the side of the hydraulic device (808) and is in communication with the hydraulic device (808).

10. The welding device for producing a sealed gas pipeline compensator that is easy to maintain according to claim 8 is characterized in that: The force-bearing plate (1006) is located at the bottom of the pressing plate (1004) and is in contact with the pressing plate (1004).

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