Turnover station and production line for assembling gas meter movement
By employing lifting cylinders, rotary cylinders, and positioning components in the flipping station and production line for assembling gas meter cores, the problem of positional shift after the core is flipped is solved, achieving stable positioning and automated assembly of the core and improving assembly efficiency.
Patent Information
- Application Number
- CN202310737221.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-19
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2043-06-19
AI Technical Summary
In the current gas meter core assembly process, the flipping station causes the core to shift position, affecting the installation accuracy of the thin-film assembly and resulting in low assembly efficiency.
Design a flipping station and production line for assembling gas meter movement bodies. The system uses lifting cylinders and rotary cylinders to drive pneumatic grippers to flip the movement body, and uses positioning components to achieve stable positioning of the movement body on the placement table. Combined with the structural design of clamping blocks and connecting rods, it ensures that the movement body is not easily shifted after flipping.
It achieves stable positioning of the movement body, avoids positional shift after flipping, improves assembly accuracy and efficiency, and supports automated assembly of gas meters.
Smart Images

Figure CN116572010B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of gas meter assembly, in particular to a turnover station for assembling a gas meter core body and a production line. BACKGROUND
[0002] With the increase of households using natural gas or pipe gas, the market demand for gas meters also increases accordingly. In order to meet the market demand, the production efficiency of the gas meter should be improved.
[0003] Referring to Figure 1 The gas meter comprises a core body and a diaphragm assembly installed on both sides of the core body, the diaphragm assembly comprises a diaphragm 1, a first connecting plate 11 and a second connecting plate 12, the diaphragm 1 is in a basin shape, the first connecting plate 11 is installed on the bottom of the diaphragm 1, and the second connecting plate 12 is installed on the inner bottom wall of the diaphragm 1. A rubber ring 13 is installed between the diaphragm assembly and the core body, and a metal ring 14 is installed on the diaphragm assembly.
[0004] Referring to Figure 1 During assembly, the rubber ring 13, the diaphragm assembly and the metal ring 14 are sequentially installed on the core body, after assembly is completed, the rubber ring 13, the diaphragm assembly and the metal ring 14 are welded to the core body, after welding is completed, the core body is turned over, and the other side of the core body is installed. However, the turnover station is usually used to turn over the core body at present, the position of the core body is prone to deviation after being turned over, so that the installation of the diaphragm assembly on the other side is also deviated. SUMMARY
[0005] In order to solve the problem of low assembly efficiency, the application provides a turnover station for assembling a gas meter core body and a production line.
[0006] In one aspect, the application provides a turnover station for assembling a gas meter core body, which adopts the following technical scheme: a turnover station for assembling a gas meter core body and a production line, comprising a workbench, a stand column is arranged on the workbench, an installation plate is installed on the stand column, a lifting cylinder is arranged on the installation plate, a rotary cylinder is arranged on the piston rod of the lifting cylinder, a pneumatic clamp jaw is installed on the rotary cylinder, a placing table for placing the core body is further arranged at the bottom of the pneumatic clamp jaw, and a positioning assembly for positioning the core body is arranged on the placing table.
[0007] By adopting the above technical scheme, the rotary cylinder is lifted by the lifting cylinder, the pneumatic clamp jaw is rotated by the rotary cylinder, the core body is turned over after being clamped by the pneumatic clamp jaw, the core body is placed on the placing table after being turned over, and the core body is clamped and positioned by the positioning assembly, so that the positioning effect of the core body can be ensured, and the core body is not prone to deviation.
[0008] In one specific implementation, the placing table is provided with a cavity, the positioning assembly is arranged in the cavity, the positioning assembly comprises a clamping block, a connecting rod and a pushing rod, a moving block is slidably arranged in the cavity, the connecting rod is arranged on both sides of the moving block, the moving block is used to push the connecting rods on both sides away from each other, the pushing rod is arranged at one end of the connecting rod away from the moving block, the pushing rod is rotatably connected with the side wall of the placing table, one end of the pushing rod away from the connecting rod is rotatably connected with a connecting plate, the clamping block is arranged on the connecting plate, a limiting groove is arranged on the top wall of the placing table, and a limiting block is arranged on the bottom wall of the clamping block and slidably arranged in the limiting groove.
[0009] By adopting the above technical scheme, after the machine core body is placed on the placing table, the machine core body pushes the moving block downward, the moving block pushes the connecting rods on both sides away from each other, the connecting rods push the pushing rod to deflect, the top end of the pushing rod pushes the clamping blocks on both sides to approach each other, and the movement of the clamping blocks is more stable under the limiting action of the limiting groove.
[0010] In one specific implementation, a spring two is sleeved on the connecting rod, one end of the spring two is in contact with the inner wall of the cavity, and the other end is in contact with the connecting rod.
[0011] By adopting the above technical scheme, by arranging the spring two, when the moving block pushes the connecting rods on both sides, the connecting rods push the spring two to shrink, after the machine core body is taken off from the placing table, the spring two resets, pushes the connecting rods to approach each other, and pushes the moving block to reset, so that the clamping and positioning of the next machine core body are facilitated.
[0012] In one specific implementation, the moving block is arranged to be inclined toward the side wall of the connecting rod, the top end of the moving block toward the side wall of the connecting rod is inclined to be away from the connecting rod, one side of the connecting rod toward the moving block is arranged to be inclined, the top end of the one side of the connecting rod toward the moving block is inclined to be close to the moving block, a limiting rod is arranged on the side wall of the moving block, a lifting rod is arranged on the limiting rod, and the lifting rod penetrates through the top wall of the placing table.
[0013] By adopting the above technical scheme, when the machine core body is placed on the placing table, the machine core body applies downward pressure to the lifting rod, the lifting rod drives the moving block to move downward, so that the clamping assemblies on both sides can be driven to approach each other, the clamping of the machine core body is realized, and the operation is convenient.
[0014] In one specific implementation, the limiting rod is provided with a guide block, a guide groove is arranged on the inner wall of the cavity, a spring one is arranged in the guide groove, one end of the spring one is in contact with the inner bottom wall of the guide groove, and the other end is in contact with the guide block.
[0015] By adopting the technical scheme, when the core body is pressed downward to the lifting rod, the lifting rod drives the guide block to compress the spring one, the spring one is contracted, and when the core body is removed from the placement table, the spring one is reset to drive the moving block and the lifting rod to reset, so that the clamping and positioning of the next core body are facilitated, and the operation is convenient.
[0016] In one specific implementation, the clamping block is provided with a receiving cavity, and a clamping assembly is arranged in the receiving cavity, which is used to clamp the bottom of the core body.
[0017] By adopting the technical scheme, the clamping assembly clamps the bottom of the core body, and the pneumatic clamping jaw clamps the middle part of the core body, which can ensure the clamping and positioning effect of the core body and avoid the impact between the pneumatic clamping jaw and the clamping assembly as much as possible, thereby protecting the clamping assembly.
[0018] In one specific implementation, the clamping assembly includes a pushing block, a clamping plate and a connecting column, the pushing block is slidingly installed in the receiving cavity, the connecting column is arranged on both sides of the pushing block, the clamping plate is arranged at one end of the connecting column away from the pushing block, and the pushing block is used to push the clamping plates on both sides to approach or move away from each other.
[0019] By adopting the technical scheme, when the pushing block contacts the core body, the core body pushes the pushing blocks on both sides to approach each other, so that the clamping plates on both sides of the positioning plate in the length direction approach each other, thereby facilitating the clamping and positioning of the core body, and the operation is convenient.
[0020] In one specific implementation, one side of the pushing block facing the core body is provided with an extension rod, and the extension rod can contact the core body through the clamping block.
[0021] By adopting the technical scheme, when the moving block drives the clamping blocks on both sides to approach each other, the extension rod contacts the core body, and the moving block pushes the extension rod to move away from itself, so that the clamping blocks on both sides can be driven to approach each other, thereby facilitating the clamping of the core body, and the operation is convenient.
[0022] In one specific implementation, the bottom wall of the clamping plate on the side away from the core body is inclined to the side close to the placement table, and the side wall of the clamping plate on the side facing the core body is vertically arranged.
[0023] By adopting the technical scheme, when the movement body needs to be taken off the placing table, the pneumatic clamping jaw clamps the movement body and drives the movement body to move upward, the movement body contacts the bottom wall of the clamping plate, and the clamping plates on both sides are pushed away from each other, so that the movement body is conveniently taken off the placing table. Since the side wall on the side of the clamping plate facing the movement body is vertically arranged, when the movement body is clamped, the contact area between the clamping plate and the movement body can be increased, and better clamping and positioning effects can be achieved.
[0024] In another aspect, the application provides a production line for assembling a gas meter movement body, which comprises the turnover station and further comprises a conveying assembly for conveying the movement body. The feeding side of the turnover station is provided with a first mounting structure for mounting the film assembly on one side of the movement body. The discharging side of the turnover station is provided with a second mounting structure for mounting the film assembly on the other side of the movement body.
[0025] By adopting the technical scheme, the production line for assembling a gas meter movement body is used to assemble the gas meter movement body, automatic assembly of the gas meter is achieved, and the assembly efficiency is improved.
[0026] In summary, the application has at least one of the following beneficial technical effects:
[0027] 1. After the turnover, the movement body is placed on the placing table, and the positioning assembly clamps and positions the movement body, so that the positioning effect of the movement body can be ensured, and the movement body is not easy to deviate;
[0028] 2. After the movement body is placed on the placing table, the movement body pushes the moving block downward, the moving block pushes the connecting rods on both sides away from each other, the connecting rods push the push rods to deflect, the top end of the push rod pushes the clamping blocks on both sides to approach each other, and under the limiting action of the limiting groove, the movement of the clamping blocks is more stable;
[0029] 3. The production line for assembling a gas meter movement body is used to assemble the gas meter movement body, automatic assembly of the gas meter is achieved, and the assembly efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0030] Figure 1 is a structure schematic view of a gas meter in the background art.
[0031] Figure 2 is a whole structure schematic view of an embodiment of the application.
[0032] Figure 3 is a structure schematic view of a turnover station in an embodiment of the application.
[0033] Figure 4 is an internal structure sectional view of a placing table in an embodiment of the application.
[0034] Figure 5 is the internal structure sectional view of the positioning block in the embodiment of the application.
[0035] Figure 6 is the structural schematic view of the clamping assembly in the embodiment of the application.
[0036] Legend:
[0037] 1, film; 11, first connecting plate; 12, second connecting plate; 13, rubber ring; 14, metal ring; 2, workbench; 21, conveying assembly; 22, first mounting structure; 23, first welding structure; 24, turnover station; 25, second mounting structure; 26, second welding structure; 3, stand column; 31, mounting plate; 32, lifting cylinder; 33, rotary cylinder; 34, pneumatic clamping jaw; 35, placing table; 4, positioning assembly; 40, cavity; 41, clamping block; 42, connecting rod; 43, pushing rod; 44, moving block; 45, limiting rod; 46, lifting rod; 47, guide block; 48, guide groove; 49, mounting rod; 50, limiting groove; 51, limiting block; 52, pushing column; 6, clamping assembly; 61, positioning block; 62, containing cavity; 63, pushing block; 64, clamping plate; 65, connecting column; 67, extension rod; 68, spring one; 69, anti-skid block; 70, spring two; 71, spring three. DETAILED DESCRIPTION
[0038] The application will be further described in detail below with reference to the drawings.
[0039] The embodiment of the application discloses a production line for assembling a gas meter movement body, referring to Figure 2 The production line for assembling the gas meter movement body comprises a workbench 2 and a conveying assembly 21 arranged on the workbench 2, and the conveying assembly 21 can be a belt conveyor or a chain conveyor, and in the embodiment, the conveying assembly 21 is a chain conveyor, and the conveying assembly 21 is used for conveying the movement body. Along the feeding direction of the movement body, the workbench 2 is sequentially provided with a first mounting structure 22, a first welding structure 23, a turnover station 24, a second mounting structure 25 and a second welding structure 26, the first mounting structure 22 is used for mounting a film assembly on the movement body, then the film 1 is welded on the movement body through the first welding structure 23, then the movement body is conveyed to the turnover station 24 through the conveying assembly 21, the turnover station 24 grabs the movement body and drives the movement body to turn over by 180 degrees, and then the turned-over movement body is placed on the conveying assembly 21. The film assembly is mounted on the other side of the movement body through the second mounting structure 25, and finally the film assembly is welded on the movement body through the second welding structure 26.
[0040] The embodiment of the application discloses a turnover station for assembling a gas meter movement body, referring to Figure 3, the gas meter core body assembly is overturned position and includes the column 3 fixed on the workbench 2, the mounting plate 31 is fixed on the column 3, the lifting cylinder 32 is fixed on the mounting plate 31, the piston rod of the lifting cylinder 32 is fixed with the rotary cylinder 33, the rotary cylinder 33 is fixed with the pneumatic clamping jaw 34.The conveying assembly 21 is fixed with the placing table 35, the core body is placed on the placing table 35, and the pneumatic clamping jaw 34 is used to clamp the middle part of the core body in the height direction.After the conveying assembly 21 drives the placing table 35 to move to the bottom of the lifting cylinder 32, the lifting cylinder 32 drives the pneumatic clamping jaw 34 to descend, and after the pneumatic clamping jaw 34 clamps the core body, the lifting cylinder 32 drives the pneumatic clamping jaw 34 to ascend, and then the rotary cylinder 33 drives the core body to rotate 180°.Then the lifting cylinder 32 drives the pneumatic clamping jaw 34 and the core body to descend, and places the core body on the placing table 35.
[0041] Referring to Figure 4 , the cavity 40 is formed in the placing table 35, the moving block 44 is slidably installed in the cavity 40, the side wall of the moving block 44 is fixed with the limiting rod 45, the top wall of the limiting rod 45 is fixed with the lifting rod 46, the lifting rod 46 vertically penetrates the placing table 35, the top wall of the lifting rod 46 is fixed with the anti-slip block 69, and the anti-slip block 69 is used to limit the lifting rod 46.The side wall of the limiting rod 45 is fixed with the guide block 47, the inner side wall of the cavity 40 is provided with the guide groove 48, and the guide block 47 is slidably installed in the guide groove 48.After the core body is placed on the placing table 35, the placing table 35 presses the lifting rod 46 downward, so as to drive the moving block 44 to descend.Spring one 68 is arranged in the guide groove 48, the bottom end of the spring one 68 is in contact with the inner bottom wall of the guide groove 48, the top end of the spring one 68 is in contact with the bottom wall of the guide block 47, and the guide groove 48 is a T-shaped groove, which can limit the spring one 68 in the guide groove 48, and try to avoid the spring one 68 from falling out of the guide groove 48.
[0042] Referring to Figure 4 , the cavity 40 is provided with a positioning assembly 4 for positioning the core body, and the positioning assembly 4 includes clamping blocks 41, connecting rods 42 and push rods 43.The connecting rods 42 are arranged on both sides of the moving block 44, and the connecting rods 42 are slidably installed in the cavity 40.The cross section of the moving block 44 is inversely trapezoidal, the top end of the side of the connecting rod 42 facing the moving block 44 is inclined to the side away from the moving block 44, and the inclined side of the connecting rod 42 is in contact with the inclined side of the moving block 44.When the moving block 44 moves downward, the connecting rods 42 on both sides can be pushed away from each other.
[0043] Referring to Figure 4The end of the connecting rod 42 away from the moving block 44 is fixed with a mounting rod 49, the mounting rod 49 is horizontally arranged, the pushing rod 43 is fixed at the end of the mounting rod 49 away from the connecting rod 42, the pushing rod 43 is hinged to the outer wall of the placing table 35, and the hinge point is arranged at the middle of the length direction of the pushing rod 43. The top wall of the placing table 35 is provided with a limiting groove 50, and the bottom wall of the clamping block 41 is integrally formed with a limiting block 51, the limiting block 51 is slidingly installed in the limiting groove 50. The limiting groove 50 is a dovetail groove in particular, and the limiting block 51 is a dovetail block in particular. The side wall of the clamping block 41 towards the pushing rod 43 is fixed with a pushing column 52, and the pushing column 52 can contact the pushing rod 43. The mounting rod 49 is sleeved with a spring 70, one end of the spring 70 is in contact with the inner side wall of the cavity 40, and the other end is in contact with the side wall of the connecting rod 42.
[0044] Referring to Figure 4 When the moving block 44 pushes the two connecting rods 42 away from each other, the spring 70 is contracted, the connecting rod 42 pushes the pushing rod 43 to deflect, so that the top end of the pushing rod 43 pushes the clamping block 41 to the side of the machine core. The clamping block 41 is fixed with a clamping assembly 6 for clamping the machine core. After the machine core is placed on the placing table 35, the clamping assembly 6 is convenient for clamping and positioning the machine core, and the operation is convenient. After the machine core is taken off from the placing table 35, under the resetting action of the spring 68 and the spring 70, the two connecting rods 42 are close to each other, and the moving block 44 and the lifting rod 46 are lifted, so that the next machine core is clamped and positioned.
[0045] Referring to Figure 5 And Figure 6 The top wall of the clamping block 41 is fixed with a positioning block 61, the positioning block 61 is provided with an accommodating cavity 62, the clamping assembly 6 comprises a pushing block 63, a clamping plate 64 and a connecting column 65, the pushing block 63 is slidingly installed in the accommodating cavity 62, the connecting column 65 is arranged on the two sides of the pushing block 63, the connecting column 65 is slidingly installed in the positioning block 61, and the connecting column 65 penetrates through the side wall of the positioning block 61. The pushing block 63 is in the shape of a prism, one side of the pushing block 63 towards the connecting column 65 is an inclined surface, the side of the inclined surface close to the machine core is arranged to incline away from the connecting column 65, one side of the connecting column 65 towards the pushing block 63 is an inclined surface, and the end of the inclined surface close to the machine core is arranged to incline close to the pushing block 63. The surfaces of the pushing block 63 and the connecting column 65 are in contact. The clamping plate 64 is fixed at the end of the connecting column 65 away from the pushing block 63, and the pushing block 63 is used to drive the two clamping plates 64 to be close to or away from each other. The side wall of the pushing rod 43 towards the machine core is fixed with an extension rod 67, and the extension rod 67 can contact the side wall of the machine core.
[0046] Referring to Figure 6When the positioning assembly 4 drives the positioning block 61 and the clamping assembly 6 to move close to each other, the core body contacts the extension rod 67, the core body pushes the extension rod 67 and the pushing block 63 away from itself, the pushing block 63 pushes the connecting columns 65 on both sides to move close to each other, thereby clamping the core body. The spring three 71 is sleeved on the connecting column 65, one end of the spring three 71 contacts the clamping plate 64, and the other end contacts the side wall of the positioning block 61. When the connecting columns 65 on both sides of the pushing block 63 and the clamping plate 64 move close to each other, the clamping plate 64 pushes the spring three 71, and the spring three 71 is retracted.
[0047] With reference to Figure 3 and Figure 4 The bottom wall of the clamping plate 64 away from the core body side is inclined to the side close to the placement table 35, and the side wall of the clamping plate 64 towards the core body side is vertically arranged. When it is needed to take down the core body, the pneumatic clamping jaw 34 drives the core body to rise, the core body contacts the bottom wall of the clamping plate 64, and drives the clamping plates 64 on both sides to move away from each other. The core body is conveniently taken out from between the clamping plates 64, and the operation is convenient.
[0048] The implementation principle of the embodiment of the application is that the film assembly is first installed on one side of the core body, then the core body is conveyed to the turnover station 24, the pneumatic clamping jaw 34 clamps the core body, drives the core body to turn over 180°, places the turned-over core body on the placement table 35, the core body pushes the lifting rod 46 downward under the action of gravity, the lifting rod 46 drives the moving block 44 to move downward, the moving block 44 makes the connecting rods 42 on both sides move away from each other, thereby driving the clamping assemblies 6 on both sides to move close to each other. When the extension rod 67 contacts the core body, the connecting columns 65 on both sides of the pushing block 63 move close to each other under the pressure of the core body, thereby driving the clamping plates 64 on both sides to move close to each other, so that the clamping plates 64 clamp and position the core body, and the core body is prevented from being deviated after being turned over.
[0049] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.
Claims
1. A turnover station for assembling a gas meter movement, comprising a worktable (2), characterized in that: The workbench (2) is provided with a stand (3), the stand (3) is provided with a mounting plate (31), the mounting plate (31) is provided with a lifting cylinder (32), the piston rod of the lifting cylinder (32) is provided with a rotary cylinder (33), the rotary cylinder (33) is provided with a pneumatic clamp jaw (34), the bottom of the pneumatic clamp jaw (34) is also provided with a placing table (35) for placing the movement body, the placing table (35) is provided with a positioning assembly (4) for positioning the movement body, the placing table (35) is provided with a cavity (40), and the positioning assembly (4) is arranged in the cavity (40); the positioning assembly (4) comprises a clamping block (41), a connecting rod (42) and a pushing rod (43), a moving block (44) is slidably arranged in the cavity (40), the connecting rod (42) is arranged on the two sides of the moving block (44), the moving block (44) is used for pushing the connecting rods (42) on the two sides away from each other, the pushing rod (43) is arranged at one end of the connecting rod (42) away from the moving block (44), the pushing rod (43) is rotatably connected with the side wall of the placing table (35), one end of the pushing rod (43) away from the connecting rod (42) is rotatably connected with a connecting plate, the clamping block (41) is arranged on the connecting plate, a limiting groove (50) is formed in the top wall of the placing table (35), a limiting block (51) is arranged on the bottom wall of the clamping block (41), and the limiting block (51) is slidably arranged in the limiting groove (50); a positioning block (61) is arranged in the clamping block (41), a containing cavity (62) is formed in the positioning block (61), a clamping assembly (6) is arranged in the containing cavity (62), and the clamping assembly (6) is used for clamping the bottom of the movement body; the pneumatic clamp jaw (34) is used for clamping the middle part of the movement body, the clamping assembly (6) comprises a pushing block (63), a clamping plate (64) and a connecting column (65), the pushing block (63) is slidably arranged in the containing cavity (62), the connecting column (65) is arranged on the two sides of the pushing block (63), and the clamping plate (64) is arranged at one end of the connecting column (65) away from the pushing block (63); the pushing block (63) is used for pushing the clamping plates (64) on the two sides to move away from or close to each other, and an extension rod (67) is arranged on the side of the pushing block (63) facing the movement body, and the extension rod (67) can pass through the clamping block (41) and contact the movement body.
2. Turnover station for the assembly of gas meter movement bodies according to claim 1, characterized in that: A spring two (70) is sleeved on the connecting rod (42), one end of the spring two (70) is in contact with the inner wall of the cavity (40), and the other end is in contact with the connecting rod (42).
3. Turnover station for the assembly of gas meter movement bodies according to claim 1, characterized in that: The moving block (44) is obliquely arranged towards the side wall of the connecting rod (42), and the top end of the side wall of the connecting rod (42) is obliquely arranged away from the connecting rod (42); one side of the connecting rod (42) is obliquely arranged towards the moving block (44), and the top end of the side of the connecting rod (42) is obliquely arranged towards the moving block (44); a limiting rod (45) is installed on the side wall of the moving block (44), a lifting rod (46) is installed on the limiting rod (45), and the lifting rod (46) penetrates the top wall of the placing table (35).
4. Turnover station for the assembly of gas meter movement bodies according to claim 3, characterized in that: The limiting rod (45) is provided with a guide block (47), the inner wall of the cavity (40) is provided with a guide groove (48), and the guide groove (48) is provided with a spring (68). One end of the spring (68) is in contact with the inner bottom wall of the guide groove (48), and the other end is in contact with the guide block (47).
5. The turn-over station for gas meter movement assembly according to claim 1, characterized in that: The bottom wall of the clamping plate (64) is obliquely arranged away from one side of the machine core body and towards the side of the placing table (35), and the side wall of the clamping plate (64) is vertically arranged towards one side of the machine core body.
6. A production line for assembling a gas meter movement, comprising a turnover station according to any one of claims 1 to 5, characterized in that: Further comprising a conveying assembly (21) for conveying the machine core body, a first mounting structure (22) is arranged on the feeding side of the turnover station (24), the first mounting structure (22) is used for mounting the film assembly on one side of the machine core body, and a second mounting structure (25) is arranged on the discharging side of the turnover station (24), the second mounting structure (25) is used for mounting the film assembly on the other side of the machine core body.
Citation Information
Patent Citations
Turnover positioning device
CN113927294A
Automatic production line for movement of diaphragm gas meter
CN114102127A