Assembly welding equipment for middle and lower shells of poison filtering unit

Abstract

The invention discloses assembly welding equipment for a lower shell in a poison filtering unit, and belongs to the technical field of civil air defense equipment production. The assembly welding equipment for the lower shell in the poison filtering unit comprises a robot welding assembly, a position changing mechanism and a welding assembly tool arranged on the position changing mechanism; the robot welding assembly is located on one side of the displacement mechanism. The position changing mechanism comprises a mounting bottom frame, a rotary supporting assembly is arranged on the mounting bottom frame, a mounting tray is arranged on the top of the rotary supporting assembly, welding assembly tools are symmetrically arranged on the two sides of the mounting tray correspondingly, and the position changing mechanism is used for changing the positions of the welding assembly tools. The welding assembly tool fixes the lower shell workpiece; according to the lower shell assembling and welding equipment in the poison filtering unit, through mechanical and automatic welding operation, manual operation is reduced, assembling and welding operation of lower shell workpieces can be continuously and efficiently completed, frequent manual intervention is not needed, the production period of a single poison filtering unit is remarkably shortened, and the overall production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of civil air defense engineering equipment production, and in particular relates to a lower shell assembly welding device for a gas filtering unit. Background Art

[0002] In the civil air defense industry, filter absorbers are an important part of the protection system, and their performance is directly related to the effectiveness of personnel safety protection. As a key component of the filter absorber, the gas filter unit has a complex manufacturing process and requires high processing precision. As the basic structural component of the gas filter unit, the assembly and welding processes of the lower shell are particularly critical. In traditional processing methods, the assembly welding of the inner and outer buckle plates of the lower shell is mainly completed manually through resistance welding. During this process, the operator needs to hold the lower shell workpiece for a long time to operate, which is not only labor-intensive, but also manual operation can easily lead to uneven welding quality, such as uneven welds, welding deformation and other problems, which affect the overall performance and sealing of the gas filter unit. Summary of the invention

[0003] In view of the deficiencies in the above-mentioned background technology, the present invention aims to provide a welding device for the lower shell assembly in a gas filter unit to solve the problems of time-consuming, labor-intensive and uncontrollable welding quality in traditional manual welding.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is as follows: Provided is a lower shell assembly welding device for a gas filtering unit, comprising a robot welding assembly, a displacement mechanism and a welding assembly tooling arranged on the displacement mechanism; the robot welding assembly is located on one side of the displacement mechanism; the displacement mechanism comprises a mounting base, a slewing support assembly is arranged on the mounting base, a mounting tray is arranged on the top of the slewing support assembly, one welding assembly tooling is symmetrically arranged on both sides of the mounting tray, and the displacement mechanism is used to change the position of the welding assembly tooling; the welding assembly tooling fixes the lower shell workpiece.

[0005] Furthermore, each of the welding assembly toolings comprises a fixed support arranged on the mounting tray and two lateral clamping assemblies symmetrically arranged on both sides of the fixed support; The fixed support is a rectangular bracket structure, the bottom of the fixed support is fixedly connected to the upper end surface of the mounting tray, and a rotary clamping cylinder is respectively arranged at the top corners on both sides of the top of the fixed support; the two side surfaces and the top surface in the width direction of the fixed support are both provided with an angle cylinder; the piston rods of the rotary clamping cylinder and the angle cylinder are both connected to a circumferential clamping assembly; four magnetic limiting seats corresponding to the lower shell are arranged on both sides of the fixed seat; Each of the lateral clamping assemblies comprises two parallel and spaced slide rails, a first sliding support and a second sliding support are respectively provided on the two slide rails, the first sliding support is located on the outside of the second sliding support, a movable pressing plate assembly for tightly contacting the side surface of the lower shell workpiece is provided on the top of the first sliding support; a positioning inner support plate for mounting and fixing the lower shell workpiece is vertically fixed on the second sliding support, and the shape and size of the positioning inner support plate match the internal size of the lower shell workpiece; A driving cylinder is arranged at the bottom of the fixed support, a traction shaft is connected to the piston rod of the driving cylinder, and the middle parts of the lower end surfaces of the first sliding support and the second sliding support are connected to the traction shaft through a connecting seat.

[0006] Furthermore, each of the circumferential clamping assemblies includes an articulated seat, one end of the articulated seat is fixedly connected to the piston rod of the rotary clamping cylinder or the angle cylinder, the other end of the articulated seat is connected to a clamping rod via a rotating shaft, the middle part of each clamping rod is hinged to the articulated seat, and both ends of each clamping rod are fixedly connected to a clamping screw.

[0007] Furthermore, a plurality of bearings are provided on both sides of the positioning inner support plate in the width direction, the inner ring of each bearing is fixed to the side surface of the positioning inner support plate, and the outer ring of the bearing is in rolling contact with the inner wall surface of the lower shell workpiece.

[0008] Furthermore, the movable pressure plate assembly includes a pressure plate arranged on the outer side surface of the positioning inner support plate, and both sides of the bottom of the pressure plate are hinged to the upper end surface of the first sliding support through a rotating hinge, and both sides of the top of the pressure plate are hinged with a support rod, and the other end of each support rod is arranged away from the pressure plate and is hinged to the upper end surface of the first sliding support.

[0009] Furthermore, the length of each support rod is adjustable.

[0010] Furthermore, the traction shaft is connected to the piston rod of the driving cylinder via a horizontal rotating joint.

[0011] Furthermore, the traction shaft is a stepped shaft structure, and the stepped part of the traction shaft is clearance-matched with the connecting seat on the lower end surface of the second sliding support; the non-stepped part of the traction shaft is fixedly connected with the connecting seat on the lower end surface of the first sliding support by a nut.

[0012] Furthermore, a shielding plate is vertically arranged at the middle position between the two welding group toolings, and the bottom of the shielding plate is fixedly connected to the upper end surface of the mounting tray.

[0013] Furthermore, conductive plates are provided on both side surfaces of each of the fixed supports, and the conductive plates are electrically connected to the welding machine pole wires.

[0014] Compared with manual welding of the lower shell workpiece, the beneficial effects of the present invention are: 1. The lower shell assembly welding equipment of a gas filter unit in the present invention almost completely eliminates manual operation through mechanized and automated welding operations, and can continuously and efficiently complete the assembly and welding operations of the lower shell workpiece without frequent manual intervention, which significantly shortens the production cycle of a single gas filter unit and improves the overall production efficiency.

[0015] 2. The lower shell assembly welding equipment in a gas filter unit in the present invention can ensure the precise alignment and positioning of the lower shell workpiece during the assembly and welding process, avoiding problems such as dimensional deviation and shape distortion caused by improper manual operation, thereby improving manufacturing accuracy; at the same time, the robot welding assembly can weld and fix the two side surfaces and top seams of the lower shell workpiece, and can ensure the consistency and stability of the welding quality.

[0016] 3. In a welding device for the lower shell assembly in a gas filter unit of the present invention, a circumferential clamping assembly is arranged on the piston rod of the rotary clamping cylinder and the angle cylinder. The clamping rod and the clamping screw in the circumferential clamping assembly can dynamically rotate at a small angle following the side of the uneven lower shell workpiece in contact with it, so as to adapt to the uneven left and right sides of the two lower shell workpieces and the inconsistent top angles of the two lower shell workpieces.

[0017] 4. In a gas filter unit of the present invention, a lower shell assembly welding device is used to position multiple bearings on the inner support plate to guide the lower shell workpiece, thereby facilitating the insertion of the lower shell workpiece.

[0018] 5. In a welding device for the lower shell assembly in a gas filtering unit in the present invention, the traction shaft is a stepped shaft structure. During the movement of the driving cylinder, it can slide freely at the stepped shaft, so that the positioning inner support plate on the second sliding support does not move first, and the movable pressure plate assembly on the first sliding support moves with the traction shaft. When the traction shaft reaches the sliding limit position at the stepped shaft, the positioning inner support plate and the movable pressure plate assembly are driven by the traction shaft to move together, thereby realizing unequal distance movement of the movable pressure plate assembly and the positioning inner support plate; when the piston rod of the driving cylinder is extended, the gap between the positioning inner support plate and the movable pressure plate assembly is increased, which is convenient for installing the two lower shell workpieces on the positioning inner support plate; when the piston rod of the driving cylinder is retracted, the movable pressure plate assembly first moves with the traction shaft, and the clamping plate presses the two lower shell workpieces on the positioning inner support plate to avoid position deviation of the two lower shell workpieces during movement.

[0019] 6. In a gas filter unit of the present invention, the lower shell is assembled with welding equipment, and the shielding plate is used to shield the welding arc to prevent the operator from being harmed by the welding arc when the robot welding assembly is welding; the conductive plate is electrically connected to the welding machine pole line to better form a welding current loop, ensure the stability of the welding arc, and prevent the metal wire mesh inside the lower shell from being damaged due to welding sparks. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the welding equipment for the lower shell assembly in the gas filtering unit.

[0021] Figure 2 It is a schematic diagram of the front view structure of the welding equipment for the lower shell assembly in the gas filtering unit.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of a single welding assembly clamping the lower shell workpiece.

[0023] Figure 4 Schematic diagram of the three-dimensional structure of a single welding group loosening the lower shell workpiece.

[0024] Figure 5 A schematic diagram of the three-dimensional structure of the lateral clamping assembly.

[0025] Figure 6 Schematic diagram of the three-dimensional structure of the circumferential clamping assembly.

[0026] Figure 7 It is a schematic diagram of the connection structure between the traction shaft and the driving cylinder.

[0027] Among them, 1. Robot welding components; 2. Displacement mechanism; 21. Install the chassis; 22. Rotary support assembly; 23. Install the tray; 3. Welding assembly tooling; 31. Fixed support; 32. Lateral clamping assembly; 321. Slide rail; 322. First sliding support; 323. Second sliding support; 324, movable pressure plate assembly; 3241, pressing plate; 3242, supporting rod; 325, positioning inner support plate; 326, driving cylinder; 327, traction shaft; 328, bearing; 33. Rotary clamping cylinder; 34. Angle cylinder; 35. circumferential clamping assembly; 351. hinged seat; 352. clamping rod; 353. clamping screw; 4. Lower shell workpiece; 5. Horizontal rotation joint; 6. Shielding board; 7. Conductive plate.

[0028] 8. Magnetic limit position DETAILED DESCRIPTION The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0029] like Figure 1~Figure 2 As shown, the present invention provides a lower shell assembly welding device in a gas filter unit. The lower shell assembly welding means that the inner buckle plate and the outer buckle plate of the lower shell are welded into a whole. The main welding positions during welding are the two side surfaces and the top joint of the lower shell. For the convenience of description, in this embodiment, the inner buckle plate and the outer buckle plate of the lower shell are referred to as the lower shell workpiece 4. The lower shell assembly welding device in the gas filter unit includes a robot welding assembly 1, a displacement mechanism 2, and a welding assembly tool 3 arranged on the displacement mechanism 2; the robot welding assembly 1 is located on one side of the displacement mechanism 2; the displacement mechanism 2 includes a mounting frame 21, a slewing support assembly 22 is arranged on the mounting frame 21, and a mounting tray 23 is arranged on the top of the slewing support assembly 22. The two sides of the mounting tray 23 are symmetrically arranged with a welding assembly tool 3, and the displacement mechanism 2 is used to change the position of the welding assembly tool 3; the welding assembly tool 3 fixes the lower shell workpiece 4.

[0030] In this embodiment, the slewing support assembly 22 is composed of components such as a slewing support, a reducer, a driving gear and a servo motor. The servo motor provides a power source, and the slewing support and the reducer increase and slow down the torque output by the motor, thereby achieving the purpose of displacing the welding assembly 3 at both ends of the installation tray 23.

[0031] The working principle of the lower shell assembly welding equipment in the gas filter unit is as follows: the lower shell workpiece 4 to be welded is fixed on the welding assembly tool 3 manually or by a robot, and then the robot welding assembly 1 welds the two side surfaces and the top seam of the lower shell workpiece 4 on the welding assembly tool 3. During the welding process, another lower shell workpiece 4 can be placed on another welding assembly tool 3 manually or by a robot. When the welding is completed, the displacement mechanism 2 rotates 180° to move the lower shell workpiece 4 on another welding assembly tool 3 to the bottom of the robot welding assembly 1, and the robot welding assembly 1 welds it and removes the welded lower shell workpiece 4 from the welding assembly tool 3. The lower shell assembly welding equipment in the gas filter unit almost completely eliminates manual operation through mechanized and automated welding operations, and can continuously and efficiently complete the assembly and welding operations of the lower shell workpiece 4 without frequent manual intervention, significantly shortening the production cycle of a single gas filter unit and improving the overall production efficiency.

[0032] like Figure 3~Figure 7 As shown, specifically, as a specific setting method of the welding assembly tool 3, each of the welding assembly tool 3 includes a fixed support 31 arranged on the mounting tray 23 and two lateral clamping components 32 symmetrically arranged on both sides of the fixed support 31. The setting of the two lateral clamping components 32 can realize the simultaneous clamping of two lower shell workpieces 4.

[0033] As shown in the figure, the fixed support 31 is a rectangular support structure, and a conductive plate 7 and a magnetic limiting seat 8 are provided on both sides of each fixed support 31. The conductive plate 7 is in direct contact with the outer side of the lower shell workpiece 4 to ensure the stability of the welding arc and prevent the metal wire mesh inside the lower shell from being damaged due to welding sparks. It is also possible to prevent the lower shell workpiece 4 and the welding group from being damaged by power during the welding process. The magnetic limiting seat 8 is directly opposite to the bolts of the lower shell workpiece 4, and the bolts are adsorbed by magnetic force to achieve positioning, providing accurate positioning for robot welding.

[0034] The bottom of the fixed support 31 is fixedly connected to the upper end surface of the mounting tray 23, and a rotary clamping cylinder 33 is respectively provided at the top corners on both sides of the top of the fixed support 31; the two side surfaces and the top surface in the width direction of the fixed support 31 are both provided with an angle cylinder 34; the piston rods of the rotary clamping cylinder 33 and the angle cylinder 34 are both connected with a circumferential clamping assembly 35; the circumferential clamping assembly 35 is used to clamp the joints on the two side surfaces and the top of the lower shell workpiece 4. Preferably, but not limited to, each of the circumferential clamping components 35 includes an articulated seat 351, one end of the articulated seat 351 is fixedly connected to the piston rod of the rotary clamping cylinder 33 or the angular cylinder 34, the other end of the articulated seat 351 is connected to a clamping rod 352 through a rotating shaft, the middle part of each clamping rod 352 is articulated to the articulated seat 351, and both ends of each clamping rod 352 are fixedly connected to a clamping screw 353. The circumferential clamping components 35 are arranged on the piston rods of the rotary clamping cylinder 33 and the angular cylinder 34, and the clamping rod 352 and the clamping screw 353 in the circumferential clamping components 35 can follow the side of the uneven lower shell workpiece 4 in contact with them to perform a small angle dynamic rotation to adapt to the uneven left and right sides of the two lower shell workpieces 4 and the inconsistent top angles of the two lower shell workpieces 4.

[0035] Each of the lateral clamping assemblies 32 includes two parallel and spaced slide rails 321, on which the first sliding support 322 and the second sliding support 323 are respectively provided, the first sliding support 322 is located on the outside of the second sliding support 323, and the top of the first sliding support 322 is provided with a movable pressure plate assembly 324 for tightly contacting the side of the lower shell workpiece 4; a positioning inner support plate 325 for installing and fixing the lower shell workpiece 4 is vertically fixed on the second sliding support 323, and the shape and size of the positioning inner support plate 325 match the internal size of the lower shell workpiece 4; a driving cylinder 326 is provided at the bottom of the fixed support 31, and a traction shaft 327 is connected to the piston rod of the driving cylinder 326, and the middle parts of the lower end surfaces of the first sliding support 322 and the second sliding support 323 are connected to the traction shaft 327 through a connecting seat. The traction shaft 327 is connected to the piston rod of the driving cylinder 326 via a horizontal rotating joint 5. The setting of the horizontal rotating joint 5 makes the traction shaft 327 and the piston rod of the driving cylinder 326 flexibly connected and can rotate relative to each other in a horizontal plane to eliminate the problem of non-parallelism during movement.

[0036] like Figure 7As shown, specifically, the traction shaft 327 is a stepped shaft structure, and the stepped part of the traction shaft 327 has a clearance fit with the connecting seat on the lower end face of the second sliding support 323; the non-stepped part of the traction shaft 327 has an interference fit with the connecting seat on the lower end face of the first sliding support 322. During the movement of the driving cylinder 326, it can slide freely at the stepped shaft, so that the positioning inner support plate 325 on the second sliding support 323 does not move first, and the movable pressure plate assembly 324 on the first sliding support 322 moves with the traction shaft 327. When the traction shaft 327 reaches the sliding limit position at the stepped shaft, the positioning inner support plate 325 and the movable pressure plate assembly 324 are driven by the traction shaft 327 to move together, thereby achieving the non-interference of the movable pressure plate assembly 324 and the positioning inner support plate 325. Isometric movement; when the piston rod of the driving cylinder 326 is extended, the gap between the positioning inner support plate 325 and the movable pressure plate assembly 324 is increased, which facilitates the installation of the two lower shell workpieces 4 on the positioning inner support plate 325; when the piston rod of the driving cylinder 326 is retracted, the movable pressure plate assembly 324 first moves with the traction shaft 327, and the clamping plate 3241 presses the two lower shell workpieces 4 on the positioning inner support plate 325 to avoid position deviation of the two lower shell workpieces 4 during movement.

[0037] Preferably, but not limited to, a plurality of bearings 328 are provided on both sides of the positioning inner support plate 325 in the width direction, the inner ring of each bearing 328 is fixed to the side of the positioning inner support plate 325, and the outer ring of the bearing 328 is in rolling contact with the inner wall surface of the lower shell workpiece 4. The plurality of bearings 328 guide the lower shell workpiece 4 to facilitate the insertion of the lower shell workpiece 4.

[0038] Specifically, as a specific setting mode of the movable pressure plate assembly 324, the movable pressure plate assembly 324 includes a clamping plate 3241 arranged on the outer side of the positioning inner support plate 325, and both sides of the bottom of the clamping plate 3241 are hinged to the upper end surface of the first sliding support 322 through a rotating hinge, and both sides of the top of the clamping plate 3241 are hinged to a support rod 3242, and the other end of each support rod 3242 is arranged away from the clamping plate 3241 and is hinged to the upper end surface of the first sliding support 322. The length of each support rod 3242 is adjustable, and the purpose of adjusting the inclination angle of the clamping plate 3241 can be achieved by adjusting the length of the support rod 3242, so that the clamping plate 3241 is parallel to the lower shell workpiece 4; the adjustable length of the support rod 3242 can be achieved by a telescopic rod or a threaded connection.

[0039] The working process of the welding assembly tooling 3 is as follows: the piston rods of the rotary clamping cylinder 33, the angle cylinder 34 and the driving cylinder 326 are extended, and the driving cylinder 326 drives the traction shaft 327 to drive the first sliding support 322 and the second sliding support 323 to move in the direction away from the fixed support 31. Since the traction shaft 327 is a stepped shaft structure, the gap between the positioning inner support plate 325 and the clamping plate 3241 is very large, and then the lower shell workpiece 4 is inserted into the two positioning inner support plates 325, and then the piston rod of the driving cylinder 326 is retracted, first driving the first sliding support 322 and the clamping plate 3241 thereon to move toward the positioning inner support plate 325, and then the clamping plate 324 1 is in close contact with the outer end surface of the lower shell workpiece 4 and presses the lower shell workpiece 4 onto the positioning inner support plate 325. When the traction shaft 327 reaches the sliding limit position at the stepped shaft, the positioning inner support plate 325 and the movable pressure plate assembly 324 are driven by the traction shaft 327 to move together until the outer end surface of the lower shell workpiece 4 is in close contact with the conductive plate 7 on the fixed support 31, and the driving cylinder 326 stops. Finally, the piston rods of the rotary clamping cylinder 33 and the corner cylinder 34 are retracted, driving the circumferential clamping assembly 35 to clamp the joints on the two sides and the top of the lower shell workpiece 4, thereby realizing the positioning and fixation of the lower shell workpiece 4, which is convenient for the subsequent automated welding of the robot welding assembly 1.

[0040] Furthermore, a shielding plate 6 is vertically arranged in the middle position between the two welding group toolings 3, and the bottom of the shielding plate 6 is fixedly connected to the upper end surface of the mounting tray 23. The shielding plate 6 is used to shield the welding arc to prevent the operator from being injured by the welding arc when the robot welding assembly 1 is welding.

[0041] In summary, the present invention proposes a welding device for the left and right baffles of the lower shell of the gas filter unit. Through mechanized and automated welding operations, manual operations are almost completely eliminated, and the assembly and welding operations of the lower shell workpiece 4 can be completed continuously and efficiently without frequent manual intervention. The production cycle of a single gas filter unit is significantly shortened, the overall production efficiency is improved, and the problems of time-consuming, labor-intensive, and uncontrollable quality existing in traditional manual welding are solved, production efficiency is improved, and the consistency and stability of product quality are ensured.

Claims

1. A welding device for the lower shell assembly of a gas filter unit, characterized in that: It comprises a robot welding assembly, a displacement mechanism and a welding assembly tooling arranged on the displacement mechanism; the robot welding assembly is located on one side of the displacement mechanism; the displacement mechanism comprises a mounting chassis, a slewing support assembly is arranged on the mounting chassis, a mounting tray is arranged on the top of the slewing support assembly, one welding assembly tooling is symmetrically arranged on both sides of the mounting tray, and the displacement mechanism is used to change the position of the welding assembly tooling; the welding assembly tooling fixes the lower shell workpiece; each of the welding assembly tooling comprises a fixed support arranged on the mounting tray and two lateral clamping assemblies symmetrically arranged on both sides of the fixed support; The fixed support is a rectangular bracket structure, the bottom of the fixed support is fixedly connected to the upper end surface of the mounting tray, and a rotary clamping cylinder is respectively arranged at the top corners on both sides of the top of the fixed support; the two side surfaces and the top surface in the width direction of the fixed support are both provided with an angle cylinder; the piston rods of the rotary clamping cylinder and the angle cylinder are both connected to a circumferential clamping assembly; four magnetic limiting seats corresponding to the positions of the lower shell bolts are arranged on both sides of the fixed seat; Each of the lateral clamping assemblies comprises two parallel and spaced slide rails, a first sliding support and a second sliding support are respectively provided on the two slide rails, the first sliding support is located on the outside of the second sliding support, a movable pressing plate assembly for tightly contacting the side surface of the lower shell workpiece is provided on the top of the first sliding support; a positioning inner support plate for mounting and fixing the lower shell workpiece is vertically fixed on the second sliding support, and the shape and size of the positioning inner support plate match the internal size of the lower shell workpiece; A driving cylinder is arranged at the bottom of the fixed support, a traction shaft is connected to the piston rod of the driving cylinder, and the middle parts of the lower end surfaces of the first sliding support and the second sliding support are connected to the traction shaft through a connecting seat.

2. The lower shell assembly welding equipment of the gas filter unit according to claim 1 is characterized in that: Each of the circumferential clamping assemblies includes an articulated seat, one end of the articulated seat is fixedly connected to the piston rod of the rotary clamping cylinder or the angle cylinder, the other end of the articulated seat is connected to a clamping rod via a rotating shaft, the middle part of each clamping rod is hinged to the articulated seat, and both ends of each clamping rod are fixedly connected to a clamping screw.

3. The lower shell assembly welding equipment of the gas filter unit according to claim 1 is characterized in that: A plurality of bearings are arranged on both sides of the positioning inner support plate in the width direction, the inner ring of each bearing is fixed to the side surface of the positioning inner support plate, and the outer ring of the bearing is in rolling contact with the inner wall surface of the lower shell workpiece.

4. The lower shell assembly welding equipment of the gas filter unit according to claim 1 is characterized in that: The movable pressure plate assemblies include a pressure plate arranged on the outer side surface of the positioning inner support plate, both sides of the bottom of the pressure plate are hinged to the upper end surface of the first sliding support through a rotating hinge, and both sides of the top of the pressure plate are hinged with a support rod, and the other end of each support rod is arranged away from the pressure plate and is hinged to the upper end surface of the first sliding support.

5. The lower shell assembly welding equipment for the gas filter unit according to claim 4 is characterized in that: The length of each support rod is adjustable.

6. The lower shell assembly welding equipment of the gas filter unit according to claim 1 is characterized in that: The traction shaft is connected to the piston rod of the driving cylinder through a horizontal rotating joint.

7. The lower shell assembly welding equipment of the gas filter unit according to claim 6 is characterized in that: The traction shaft is a stepped shaft structure, and the stepped part of the traction shaft is clearance-matched with the connecting seat on the lower end surface of the second sliding support; the non-stepped part of the traction shaft is fixedly connected to the connecting seat on the lower end surface of the first sliding support by a nut.

8. The lower shell assembly welding equipment of the gas filter unit according to claim 1 is characterized in that: A shielding plate is vertically arranged at the middle position between the two welding group toolings, and the bottom of the shielding plate is fixedly connected to the upper end surface of the mounting tray.

9. The lower shell assembly welding equipment of the gas filter unit according to any one of claims 1 to 8, characterized in that: Conductive plates are arranged on both side surfaces of each fixed support, and the conductive plates are electrically connected with the welding machine pole wires.

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