A pressure transmitter diaphragm welding device

Abstract

The present invention belongs to the field of welding, and specifically is a pressure transmitter diaphragm welding device, comprising a welding seat, a frame installed at the top rear end of the welding seat, and a welding assembly installed at the front of the frame. The present invention drives a winding pull disk to rotate through a motor to wind a winding pull rope, and the winding pull rope pulls a top block to push a slider to move so as to move a limiting column fixed at the bottom. When the limiting column moves, four limiting columns located on both sides of the front of the frame expand outward, and the spacing between the limiting columns is expanded. In this way, the spacing between the limiting columns can be adjusted to make it suitable for the limiting work of diaphragms of different sizes. When the slider moves the rod under the thrust of the top block, the slider squeezes a spring 1 to make it contract. When it is necessary to reduce the spacing between the limiting columns, the motor is started to drive the winding pull disk to rotate in the opposite direction to loosen the wound winding pull rope, and the elastic force of the spring 1 is used to push the slider to drive the limiting columns to move closer, thereby reducing the spacing between the limiting columns, making it suitable for diaphragms of smaller sizes.

Description

Technical Field

[0001] The invention belongs to the field of welding, in particular to a pressure transmitter diaphragm welding device. Background Art

[0002] The pressure transmitter diaphragm is an important component in the pressure transmitter. It directly contacts the measured medium and converts the pressure signal into an electrical signal. Depending on the material of the diaphragm, the method of fixing the diaphragm is also different. For metal diaphragms, welding is usually used to fix them. For this reason, pressure transmitter diaphragm welding equipment is required.

[0003] The diaphragm on the pressure transmitter is in direct contact with the measured medium, and its position is very important. If the installation position of the diaphragm is inaccurate, the diaphragm position deviation may cause the pressure to not act evenly on the diaphragm, causing the measured pressure value to deviate from the actual pressure. The pressure that should have been evenly distributed on the diaphragm may be concentrated on one side due to the incorrect diaphragm position, resulting in a higher or lower measurement result.

[0004] To this end, the present invention provides a pressure transmitter diaphragm welding device. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a pressure transmitter diaphragm welding device described in the present invention includes a welding seat, a frame installed at the rear end of the top of the welding seat, a welding assembly installed at the front of the frame, and a pressure transmitter body placed on the top of the welding seat, both sides of the front of the frame are provided with limit assemblies, a pressing assembly is provided between the limit assemblies, both sides of the pressing assembly are provided with traction assemblies, and a retraction assembly is provided on the limit assembly.

[0007] Preferably, the limit assembly includes a bracket fixed on both sides of the front part of the frame, a support shell is fixed at the front end and the rear end of the bottom of the bracket, a limit column is arranged at the bottom of the support shell, a guide column is fixed inside the support shell, a slider and a top block are sleeved on the outside of the guide column, the top block is located in front of the slider, and the slider is located directly above the limit column and is fixedly connected to the limit column.

[0008] Preferably, the limiting assembly also includes a spring wound around the outside of the guide column, and winding disks are rotatably arranged on both sides of the rear part of the support shell, the two winding disks are fixedly connected, a motor is installed on one of the winding disks, and the output end of the motor is fixedly connected to one side of the winding disk, and winding ropes are fixed on both sides of the top block, and one end of the winding rope protrudes from the rear end of the support shell and is fixed on the winding disk.

[0009] Preferably, the front portion of spring one is fixedly connected to the slider, and the rear portion of spring one is fixedly connected to the inner wall of the support shell.

[0010] Preferably, the pressing assembly includes a movable shell arranged between two brackets, a retraction frame is arranged at the bottom end of the movable shell, rollers are rotatably arranged on both sides of the bottom of the retraction frame, guide grooves are opened on both sides of the movable shell, guide blocks are arranged inside the guide grooves, the guide blocks are fixed to both sides of the retraction frame, a spring 2 is fixed to the top of the retraction frame, and the top of the spring 2 is fixedly connected to the top of the movable shell.

[0011] Preferably, the traction assembly includes a cross frame fixed at the middle position of the bottom of the bracket, the cross frame is located on both sides of the movable shell, a rotating shaft is rotatably arranged inside the cross frame, one end of the rotating shaft is fixed to the side wall of the movable shell, and the other end of the rotating shaft extends to one side of the cross frame where a gear rod is fixed, a pulley 1 is arranged outside the gear rod, and a tooth groove is opened inside the pulley 1.

[0012] Preferably, two rotating shafts are provided, and the two rotating shafts are symmetrical on both sides of the center line of the movable shell.

[0013] Preferably, the pulley 1 is sleeved on the outside of the gear rod through the tooth groove, and the pulley 1 can slide horizontally outside the gear rod through the tooth groove and engage with the gear rod.

[0014] Preferably, the traction assembly also includes a displacement groove opened at the top of the two front support shells, a connecting frame is arranged in the displacement groove, one end of the connecting frame is fixedly connected to the top of the slider, a movable block is fixed to the other end of the top of the connecting frame, the movable block is located at the top of the support shell, a rotating wheel frame is fixed to the side wall of the movable block, pulley one is rotatably arranged at one end of the rotating wheel frame, pulley two is rotatably arranged on one side of the rotating wheel frame, pulley two is opposite to the position of the rotating wheel frame and is connected to the rotating wheel frame through a belt, gear one is arranged on the other side of the rotating wheel frame, gear one is opposite to the position of pulley two and is fixedly connected to pulley two, gear two is meshed on one side of gear one, a torsion spring is arranged inside the cross frame, the torsion spring is wound around the outside of the rotating shaft, the outer side of the torsion spring is fixedly connected to the inner wall of the cross frame, and the inner side of the torsion spring is fixedly connected to the outer wall of the rotating shaft.

[0015] Preferably, the retraction assembly includes retraction wheels rotatably arranged at the front and rear ends of the movable block, the two movable blocks are fixedly connected and located on both sides of the support shell, the retraction wheel located at the rear end of the movable block corresponds to gear two and is fixedly connected to gear two, the front and rear ends of the two front limiting columns are fixed with pulling blocks, a retraction rope is fixed on the pulling block, and one end of the retraction rope is fixed on the retraction wheel.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The pressure transmitter diaphragm welding equipment described in the present invention drives the winding disk to rotate by a motor to wind the winding rope, and the winding rope pulls the top block to push the slider to move so as to move the limit column fixed at the bottom. The limit column moves, and the four limit columns located on both sides of the front of the frame expand outward, and the distance between the limit columns is expanded. In this way, the distance between the limit columns can be adjusted to make it suitable for the limiting work of diaphragms of different sizes. When the slider moves the rod under the thrust of the top block, the slider squeezes the spring 1 to make it shrink. When it is necessary to reduce the distance between the limit columns, the motor is started to drive the winding disk to rotate in the opposite direction to loosen the wound winding rope, and the elastic force of the spring 1 is used to push the slider to drive the limit columns to move closer, thereby reducing the distance between the limit columns, making it suitable for diaphragms of smaller sizes.

[0018] 2. The pressure transmitter diaphragm welding device described in the present invention has the following advantages: when the diaphragm is placed between the four limit posts, the two limit posts at the front will block the diaphragm. When the diaphragm is placed, the movable shell and the retraction frame are pushed to make them tilted, and the two limit posts at the front are pulled apart to both sides in cooperation with the traction assembly and the retraction assembly, leaving enough space for the placement of the diaphragm. After the diaphragm is placed, the pushed movable shell and the retraction frame are released, and the movable shell and the retraction frame are reset to a state perpendicular to the diaphragm by the action of the traction assembly, and the bottom of the roller contacts the top of the diaphragm. Since the diaphragm has a certain thickness, the diaphragm pushes up the retraction frame to retract it into the movable shell, and the retraction frame squeezes the spring 2 to retract it. When the movable shell and the retraction frame are pushed to tilt, the movable shell will drive the rotating shafts on both sides to rotate, and the rotation of the rotating shaft will drive the torsion spring to rotate and tighten, and the rotating shaft will drive the gear rod to rotate, and the gear rod will drive pulley one to rotate, and pulley one drives pulley two to rotate through the belt, and pulley two drives gear one to rotate, and gear one drives gear two to rotate, and the rotation of gear two provides driving force for the retraction component, and cooperates with the retraction component to pull the limit posts on both sides of the front to move and expand to leave enough space for the diaphragm to be put in. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is the overall structural diagram of the present invention;

[0021] Figure 2 It is a local structure in the present invention Figure 1 ;

[0022] Figure 3 It is a local structure in the present invention Figure 2 ;

[0023] Figure 4It is a partial structural cross-sectional view of the present invention;

[0024] Figure 5 The limit component structure of the present invention is a cross-sectional view Figure 1 ;

[0025] Figure 6 The limit component structure of the present invention is a cross-sectional view Figure 2 ;

[0026] Figure 7 is a cross-sectional view of the retractable assembly structure of the present invention;

[0027] Figure 8 It is a partial structural diagram of the traction assembly in the present invention;

[0028] Fig. 9 It is a partial structural cross-sectional view of the traction assembly in the present invention;

[0029] In the figure: 1, welding seat; 2, frame; 3, welding assembly; 4, pressure transmitter body; 5, limit assembly; 51, bracket; 52, support shell; 53, limit column; 54, winding plate; 55, motor; 56, guide column; 57, slider; 58, top block; 59, spring 1; 510, winding rope; 6, traction assembly; 61, cross frame; 62, rotating shaft; 63, gear rod; 64, movable block; 65 , rotating wheel frame; 66, pulley one; 67, pulley two; 68, gear one; 69, gear two; 610, connecting frame; 611, displacement groove; 612, tooth groove; 613, torsion spring; 7, pressing assembly; 71, movable shell; 72, retraction frame; 73, roller; 74, guide groove; 75, guide block; 76, spring two; 8, retraction assembly; 81, retraction wheel; 82, retraction rope; 83, pulling block. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figures 1 to 9 As shown, a pressure transmitter diaphragm welding device according to an embodiment of the present invention includes a welding seat 1, a frame 2 installed at the top rear end of the welding seat 1, a welding assembly 3 installed at the front of the frame 2, and a pressure transmitter body 4 placed on the top of the welding seat 1, limiting assemblies 5 are arranged on both sides of the front of the frame 2, a pressing assembly 7 is arranged between the limiting assemblies 5, traction assemblies 6 are arranged on both sides of the pressing assembly 7, and a retraction assembly 8 is arranged on the limiting assembly 5.

[0032] The diaphragm on the pressure transmitter is in direct contact with the measured medium, and its position is very important. If the installation position of the diaphragm is inaccurate, the diaphragm position deviation may cause the pressure to not act evenly on the diaphragm, resulting in a deviation between the measured pressure value and the actual pressure. The pressure that should have been evenly distributed on the diaphragm may be concentrated on one side due to the incorrect position of the diaphragm, resulting in a higher or lower measurement result.

[0033] A clamp for fixing the pressure transmitter is installed on the welding seat 1, the pressure transmitter is fixed by the clamp, the diaphragm is placed on the fixed end face of the pressure transmitter, the diaphragm is welded by the welding assembly 3, and the diaphragm is welded to the pressure transmitter, so that the welding work of the diaphragm of the pressure transmitter can be completed;

[0034] When placing the diaphragm, the limit component 5 is used to limit the placed diaphragm to ensure that it can be accurately placed in the required position of the pressure transmitter. The limit component 5 can be adjusted accordingly according to the size of the diaphragm to be suitable for the limiting operation of different diaphragms. When the diaphragm is placed between the limit components 5 for limiting, the diaphragm is pushed by the pressing component 7, and the pressing component 7 is used in conjunction with the traction component 6 to open the two front limiting components 5 for the diaphragm to be placed. After the diaphragm is placed, the traction component 6 is used to reset the pressing component 7, and the pressing component 7 is used in conjunction with the traction component 6 to reset the two front limiting components 5 to limit the diaphragm, thereby completing the placement and limiting operations of the diaphragm.

[0035] like Figures 1 to 6 As shown, the limit assembly 5 includes a bracket 51 fixed on both sides of the front part of the frame 2, a support shell 52 is fixed at the front and rear ends of the bottom of the bracket 51, a limit column 53 is arranged at the bottom of the support shell 52, a guide column 56 is fixed inside the support shell 52, a slider 57 and a top block 58 are sleeved on the outside of the guide column 56, the top block 58 is located in front of the slider 57, the slider 57 is located directly above the limit column 53 and is fixedly connected to the limit column 53, and the limit assembly 5 also includes a spring wound around the outside of the guide column 56 A spring 59 is rotatably provided with winding disks 54 on both sides of the rear portion of the support shell 52, and the two winding disks 54 are fixedly connected, a motor 55 is installed on one of the winding disks 54, and the output end of the motor 55 is fixedly connected to one side of the winding disk 54, and a winding rope 510 is fixed on both sides of the top block 58, one end of the winding rope 510 protrudes from the rear end of the support shell 52 and is fixed on the winding disk 54, the front part of the spring 59 is fixedly connected to the slider 57, and the rear part of the spring 59 is fixedly connected to the inner wall of the support shell 52.

[0036] After the pressure transmitter is fixed by the clamp, the limit column 53 is located on the fixed end face of the diaphragm of the pressure transmitter. According to the size of the diaphragm, the distance between the limit columns 53 on both sides is adjusted to ensure that the limit columns 53 can accurately act on both sides of the diaphragm and limit it.

[0037] The motor 55 is started, and the motor 55 drives the winding plate 54 to rotate to wind the winding rope 510. The winding rope 510 pulls the top block 58 to push the slider 57 to move so that the limiting column 53 fixed at the bottom moves. The limiting column 53 moves, and the four limiting columns 53 on both sides of the front part of the frame 2 expand outward, and the distance between the limiting columns 53 is expanded. In this way, the distance between the limiting columns 53 can be adjusted to make it suitable for the limiting work of diaphragms of different sizes;

[0038] When the slider 57 is pushed by the top block 58 to move the rod, the slider 57 will squeeze the spring 1 59 to shrink it. When it is necessary to reduce the distance between the limit posts 53, the motor 55 is started to drive the winding pull disc 54 to rotate in the opposite direction to loosen the wound winding pull rope 510. The elastic force of the spring 1 59 is used to push the slider 57 to drive the limit posts 53 closer, thereby reducing the distance between the limit posts 53 and making it suitable for smaller sized diaphragms.

[0039] The four limiting posts 53 act on both sides of the diaphragm in pairs to limit the diaphragm so that the diaphragm can be accurately placed on the mounting end surface of the pressure transmitter.

[0040] like Figure 1 , Figure 2 and Figure 7 As shown, the pressing assembly 7 includes a movable shell 71 arranged between two brackets 51, a retracting frame 72 is arranged at the bottom end of the movable shell 71, rollers 73 are rotatably arranged on both sides of the bottom of the retracting frame 72, guide grooves 74 are opened on both sides of the movable shell 71, guide blocks 75 are arranged inside the guide grooves 74, and the guide blocks 75 are fixed on both sides of the retracting frame 72, and a spring 76 is fixed on the top of the retracting frame 72, and the top of the spring 76 is fixedly connected to the top of the movable shell 71.

[0041] When the diaphragm is placed between the four limit posts 53, the two limit posts 53 at the front will block the diaphragm. When placing the diaphragm, the movable shell 71 and the retraction frame 72 are pushed to tilt them, and the traction assembly 6 and the retraction assembly 8 are cooperated to pull the two limit posts 53 at the front to both sides, leaving enough space for the diaphragm to be placed. After the diaphragm is placed, the pushed movable shell 71 and the retraction frame 72 are released. The movable shell 71 and the retraction frame 72 are reset to a state perpendicular to the diaphragm by the action of the traction assembly 6, and the bottom of the roller 73 contacts the top of the diaphragm. Since the diaphragm has a certain thickness, the diaphragm will push up the retraction frame 72 to retract it into the movable shell 71, and the retraction frame 72 squeezes the spring second 76 to shrink it. The spring second 76 applies a reaction force to the retraction frame 72 so that the rollers 73 on both sides of the bottom are tightly attached to the top of the diaphragm, thereby applying a certain pressure to the diaphragm, pressing the diaphragm to ensure the stability of its position.

[0042] like Figures 1 to 9As shown, the traction assembly 6 includes a cross frame 61 fixed at the middle position of the bottom of the bracket 51, the cross frame 61 is located on both sides of the movable shell 71, and a rotating shaft 62 is rotatably arranged inside the cross frame 61. One end of the rotating shaft 62 is fixed to the side wall of the movable shell 71, and the other end of the rotating shaft 62 extends to one side of the cross frame 61 and is fixed with a gear rod 63. A pulley 66 is arranged on the outside of the gear rod 63, and a tooth groove 612 is arranged inside the pulley 66. There are two rotating shafts 62, and the two rotating shafts 62 are symmetrical on both sides of the center line of the movable shell 71. The pulley 66 is sleeved on the outside of the gear rod 63 through the tooth groove 612. The pulley 66 can slide horizontally outside the gear rod 63 through the tooth groove 612 and mesh with the gear rod 63. The traction assembly 6 also includes a displacement groove 611 opened on the top of the two front support shells 52, and a connecting frame 610 is arranged in the displacement groove 611. The connecting frame 61 One end of 0 is fixedly connected to the top of the slider 57, and the other end of the top of the connecting frame 610 is fixed with a movable block 64, and the movable block 64 is located at the top of the supporting shell 52. A rotating wheel frame 65 is fixed to the side wall of the movable block 64. Pulley 1 66 is rotatably set at one end of the rotating wheel frame 65, and a pulley 2 67 is rotatably set on one side of the rotating wheel frame 65. The position of the pulley 2 67 is opposite to the position of the rotating wheel frame 65 and is connected to the rotating wheel frame 65 through a belt. A gear 1 68 is set on the other side of the rotating wheel frame 65, and the gear 1 68 is opposite to the position of the pulley 2 67 and is fixedly connected to the pulley 2 67. One side of the gear 1 68 is meshed with a gear 2 69. A torsion spring 613 is set inside the cross frame 61, and the torsion spring 613 is wound around the outside of the rotating shaft 62. The outer side of the torsion spring 613 is fixedly connected to the inner wall of the cross frame 61, and the inner side of the torsion spring 613 is fixedly connected to the outer wall of the rotating shaft 62.

[0043] When the movable shell 71 and the retracting frame 72 are pushed to tilt, the movable shell 71 will drive the rotating shafts 62 on both sides to rotate, and the rotation of the rotating shafts 62 will drive the torsion springs 613 to rotate and tighten, and the rotating shafts 62 will drive the gear rods 63 to rotate, and the gear rods 63 will drive the pulley 1 66 to rotate, and the pulley 1 66 drives the pulley 2 67 to rotate through the belt, and the pulley 2 67 drives the gear 1 68 to rotate, and the gear 1 68 drives the gear 2 69 to rotate, and the rotation of the gear 2 69 provides driving force for the retracting assembly 8, and cooperates with the retracting assembly 8 to pull the limiting posts 53 on both sides of the front to move and expand to both sides, leaving enough space for the diaphragm to be placed, wherein the movement of the limiting posts 53 will drive the slider 57 to squeeze the spring 1 59;

[0044] After the ends of the diaphragm come into contact with the limiting posts 53 on both sides of the rear portion, the pushed movable shell 71 is released, and the torsion spring 613 uses its own elastic force to drive the rotating shaft 62 to reverse, the rotating shaft 62 drives the gear rod 63 to reverse, the gear rod 63 drives the pulley 1 66 to react, the pulley 1 66 drives the pulley 2 67 to reverse through the belt, the pulley 2 67 drives the gear 1 68 to reverse, the gear 1 68 drives the gear 2 69 to reverse, the gear 2 69 gradually loses the driving force on the retraction component 8, and the retraction component 8 gradually stops pulling the limiting post 53, and at the same time, uses the elastic force of the spring 1 59 to push the slider 57 to move toward the position of the top block 58, and when the slider 57 is in close contact with the top block 58, the limiting post 53 is reset and cooperates with the limiting post 53 at the rear to limit the diaphragm;

[0045] It should be noted here that the movable block 64 is fixedly connected to the slider 57 through the connecting frame 610. The movement of the slider 57 will drive the movable block 64 to move, and the rotating wheel frame 65 fixedly connected to the movable block 64 will move along with it. The components installed on the rotating wheel frame 65 will also move along with it. In addition, it is necessary to limit the rotation of the rotating shaft 62 so that the movable shell 71 can only be pushed backward and flipped forward to reset to a position perpendicular to the diaphragm.

[0046] like Figures 1 to 4 As shown, the retraction assembly 8 includes a retraction wheel 81 rotatably arranged at the front and rear ends of the movable block 64, the two movable blocks 64 are fixedly connected and located on both sides of the support shell 52, the retraction wheel 81 located at the rear end of the movable block 64 corresponds to the gear 2 69 and is fixedly connected to the gear 2 69, and the front and rear ends of the two front limiting columns 53 are fixed with pull blocks 83, and the pull blocks 83 are fixed with a retraction rope 82, and one end of the retraction rope 82 is fixed to the retraction wheel 81.

[0047] The rotation of the gear 2 69 will drive the retraction wheel 81 to rotate, and the rotating retraction wheel 81 will wind the retraction rope 82, and the retraction rope 82 will pull the pull block 83 to drive the limit column 53 to move, so that the limit columns 53 on both sides of the front can be expanded to both sides, leaving enough space for the diaphragm to be inserted;

[0048] After the diaphragm is put in, gear 2 69 reverses, the retraction wheel 81 stops winding the retraction rope 82, the slider 57 is pushed by the elastic force of spring 1 59, the limiting column 53 moves accordingly, and the limiting column 53 drives the pulling block 83 to pull the retraction rope 82 so that the retraction rope 82 wound on the retraction wheel 81 is released.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A pressure transmitter diaphragm welding device, comprising a welding seat (1), a frame (2) mounted at the top rear end of the welding seat (1), a welding assembly (3) mounted at the front of the frame (2), and a pressure transmitter body (4) placed on the top of the welding seat (1), characterized in that: Limiting assemblies (5) are provided on both sides of the front of the frame (2), a material pressing assembly (7) is provided between the limiting assemblies (5), a pulling assembly (6) is provided on both sides of the material pressing assembly (7), and a retracting assembly (8) is provided on the limiting assemblies (5); The limiting assembly (5) comprises a bracket (51) fixed to both sides of the front part of the frame (2); a support shell (52) is fixed to the front and rear ends of the bottom of the bracket (51); a limiting column (53) is arranged at the bottom of the support shell (52); a guide column (56) is fixed inside the support shell (52); a sliding block (57) and a top block (58) are sleeved on the outside of the guide column (56); the top block (58) is located in front of the sliding block (57); the sliding block (57) is located directly above the limiting column (53) and is fixedly connected to the limiting column (53); The limit assembly (5) further comprises a spring (59) wound around the outside of the guide column (56); winding discs (54) are rotatably arranged on both sides of the rear portion of the support shell (52); the two winding discs (54) are fixedly connected; a motor (55) is mounted on one of the winding discs (54); an output end of the motor (55) is fixedly connected to one side of the winding disc (54); winding ropes (510) are fixed on both sides of the top block (58); one end of the winding rope (510) protrudes from the rear end of the support shell (52) and is fixed to the winding disc (54); The material pressing assembly (7) comprises a movable shell (71) arranged between two brackets (51), a retracting frame (72) is arranged at the bottom end of the movable shell (71), rollers (73) are rotatably arranged on both sides of the bottom of the retracting frame (72), guide grooves (74) are opened on both sides of the movable shell (71), guide blocks (75) are arranged inside the guide grooves (74), the guide blocks (75) are fixed to both sides of the retracting frame (72), a spring 2 (76) is fixed to the top of the retracting frame (72), and the top of the spring 2 (76) is fixedly connected to the top of the movable shell (71); The traction assembly (6) comprises a cross frame (61) fixed at the middle position of the bottom of the bracket (51), the cross frame (61) being located on both sides of the movable shell (71), a rotating shaft (62) being rotatably arranged inside the cross frame (61), one end of the rotating shaft (62) being fixed to the side wall of the movable shell (71), the other end of the rotating shaft (62) extending to one side of the cross frame (61) being fixed with a gear rod (63), a pulley (66) being arranged outside the gear rod (63), and a tooth groove (612) being arranged inside the pulley (66); The traction assembly (6) further comprises a displacement groove (611) formed on the top of the two front support shells (52), a connecting frame (610) being arranged in the displacement groove (611), one end of the connecting frame (610) being fixedly connected to the top of the slider (57), a movable block (64) being fixed to the other end of the top of the connecting frame (610), the movable block (64) being located on the top of the support shell (52), a rotating wheel frame (65) being fixed to the side wall of the movable block (64), a pulley 1 (66) being rotatably arranged on one end of the rotating wheel frame (65), a pulley 2 (67) being rotatably arranged on one side of the rotating wheel frame (65), and the pulley 2 (67) being rotatably arranged on the other side of the rotating wheel frame (65). 67) is opposite to the position of the rotating wheel frame (65) and is connected to the rotating wheel frame (65) through a belt, a gear one (68) is arranged on the other side of the rotating wheel frame (65), the gear one (68) is opposite to the position of the belt pulley two (67) and is fixedly connected to the belt pulley two (67), one side of the gear one (68) is meshed with a gear two (69), a torsion spring (613) is arranged inside the cross frame (61), the torsion spring (613) is wound around the outside of the rotating shaft (62), the outer side of the torsion spring (613) is fixedly connected to the inner wall of the cross frame (61), and the inner side of the torsion spring (613) is fixedly connected to the outer wall of the rotating shaft (62); The retraction assembly (8) comprises retraction wheels (81) rotatably arranged at the front and rear ends of the movable block (64); the two movable blocks (64) are fixedly connected and located at both sides of the support shell (52); the retraction wheel (81) located at the rear end of the movable block (64) corresponds to the second gear (69) and is fixedly connected to the second gear (69); the front and rear ends of the two front limit columns (53) are both fixed with pull blocks (83); a retraction rope (82) is fixed on the pull block (83); one end of the retraction rope (82) is fixed on the retraction wheel (81).

2. A pressure transmitter diaphragm welding device according to claim 1, characterized in that: The front part of the spring one (59) is fixedly connected to the slider (57), and the rear part of the spring one (59) is fixedly connected to the inner wall of the support shell (52).

3. The pressure transmitter diaphragm welding device according to claim 1, characterized in that: Two rotating shafts (62) are provided, and the two rotating shafts (62) are symmetrical on both sides of the midline of the movable shell (71).

4. The pressure transmitter diaphragm welding device according to claim 1, characterized in that: The belt pulley (66) is sleeved on the outside of the gear rod (63) through the tooth groove (612). The belt pulley (66) can slide horizontally outside the gear rod (63) through the tooth groove (612) and mesh with the gear rod (63).

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