Automatic valve machining and assembling device and using method

Abstract

The application relates to the technical field of valve assembling, and discloses a valve machining automatic assembling equipment and a using method, which comprises a first conveying belt and an L-shaped support, the vertical edge of the L-shaped support is vertically fixedly installed at the center of one side of the top of the first conveying belt, a rotating disc is horizontally rotationally arranged below the horizontal edge of the L-shaped support, a round roller is vertically rotationally arranged at the center below the rotating disc, annular inclined grooves are formed in the surface of the round roller, slide columns are slidably arranged at the two ends of the annular inclined grooves, clamps are arranged below the two symmetrical ends of the bottom of the rotating disc, a strip-shaped box is horizontally fixedly installed at the bottom of the first conveying belt, and a toothless gear is rotationally installed at one side end of the strip-shaped box. The two clamps can alternately clamp valve rods, the clamp close to the clamping plate can also move downwards, the valve rod and the valve body can be conveniently approached, the valve rod and the valve body can be conveniently assembled, manual operation is not needed, the valve rod can be taken to assemble on the valve body, and the accuracy and the speed during assembly are improved.

Description

Technical Field

[0001] This invention relates to the field of valve assembly technology, and in particular to an automatic valve assembly equipment and its usage method. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters (temperature, pressure, and flow rate) of the conveyed medium. Based on their function, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are devices used in fluid systems to control the direction, pressure, and flow rate of fluids. They are devices that allow the medium (liquid, gas, powder) within piping and equipment to flow or stop and control its flow rate. Valve components need to be assembled after manufacturing.

[0003] Currently, valve assembly production lines typically rely on manual assembly. However, some valves are quite large and heavy, making it difficult and inconvenient for workers to handle and move them, thus increasing their workload. Furthermore, aligning the valve stem with the valve body's holes when installing it is cumbersome and inefficient. Therefore, there is an urgent need to redesign an automated valve assembly equipment and method to solve the problem of low valve assembly efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of low valve assembly efficiency in the prior art, and to propose an automatic valve assembly equipment and its usage method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A valve assembly production line includes a first conveyor belt and an L-shaped bracket. The vertical side of the L-shaped bracket is vertically fixed at the center of the top side of the first conveyor belt, and a turntable is horizontally rotatably mounted below the horizontal side of the L-shaped bracket. A circular roller is vertically rotatably mounted at the center below the turntable, and an annular inclined groove is formed on the surface of the roller. Sliding columns slide at both ends of the annular inclined groove. Clamps are provided at both ends of the bottom of the turntable. A strip box is horizontally fixedly mounted at the bottom of the first conveyor belt, and a missing gear is rotatably mounted at one end of the strip box. A first gear is rotatably mounted on one side of the first conveyor belt, and the first gear and the missing gear mesh. Clamping plates slide on both sides of the top of the first conveyor belt, and a synchronous moving mechanism for synchronously moving the two clamping plates is provided inside the strip box. A rotating mechanism for rotating the turntable is provided at the top of the horizontal side of the L-shaped bracket.

[0007] As a further technical solution of the present invention, a second conveyor belt and a third conveyor belt are respectively installed at both ends of the first conveyor belt, and the second conveyor belt and the third conveyor belt are arranged symmetrically at the center. A centering plate is fixedly installed on both sides of the top of the first conveyor belt near the second conveyor belt, and the two centering plates are arranged symmetrically. Support legs are installed at the bottom of the first conveyor belt, the second conveyor belt and the third conveyor belt.

[0008] As a further technical solution of the present invention, a third rotating shaft is vertically fixedly installed at the top center of the turntable, and the top end of the third rotating shaft is rotatably installed at the bottom of the horizontal side of the L-shaped bracket. A first rotating shaft is fixedly installed at the bottom center of the turntable, and the end of the first rotating shaft is rotatably installed at the top center of the roller.

[0009] As a further technical solution of the present invention, a second rotating shaft is fixedly installed at the center of the bottom of the roller, and the end of the second rotating shaft is fixedly installed on one side of the top of the first conveyor belt.

[0010] As a further technical solution of the present invention, sleeves are vertically fixedly installed at both ends of the bottom of the turntable, and a sleeve rod slides inside each sleeve. The ends of the two sleeve rods pass through the ends of the sleeves and are respectively fixedly installed on the top of the two clamps, and the other two ends of the two sliding columns are respectively fixedly installed on the opposite side ends of the two sleeve rods.

[0011] As a further technical solution of the present invention, the synchronous movement mechanism includes: a sliding plate and a lead screw. There are two sliding plates, and the two sliding plates slide on both ends of the inside of the strip box. U-shaped rods are fixedly installed on the sides of the two clamping plates away from each other, and the other two ends of the two U-shaped rods are fixedly installed on the ends of the sides of the two sliding plates away from each other.

[0012] As a further technical solution of the present invention, the lead screw is horizontally rotatably installed inside the strip box, and the surface of the lead screw is threadedly connected to the inside of two slide plates, and the thread directions of the lead screw connecting the two slide plates are opposite.

[0013] As a further technical solution of the present invention, a drive motor is installed on one end of the inside of the bar box, and the output shaft of the drive motor is installed at the center of one end of the lead screw. The end of the lead screw and the side without gear are fixedly installed with the same connecting shaft.

[0014] As a further technical solution of the present invention, the rotating mechanism includes: a first bevel gear and a rotating rod. The first bevel gear is rotatably mounted on the top of the horizontal side of the L-shaped bracket, and a connecting shaft is fixedly installed between the bottom of the first bevel gear and the third rotating shaft. A second bevel gear meshes with one side of the first bevel gear, and a limiting block is fixedly installed on the top of the horizontal side of the L-shaped bracket. The top of the rotating rod is fixedly mounted at the center of one side of the second bevel gear, and the surface of the rotating rod is rotatably mounted inside the limiting block. A belt is vertically rotatably mounted on one side of the vertical side of the L-shaped bracket, and pulleys are provided at both ends of the belt. One pulley is fixedly mounted at the end of the rotating rod, and the other pulley is fixedly mounted at the center of one side of the first gear.

[0015] This invention discloses a valve assembly production line processing method, comprising the following steps:

[0016] S1: First, place the valve body on the second conveyor belt, then place the valve stem under the clamp and hold it. The second conveyor belt will transport the valve body to the first conveyor belt. When the valve body moves on the first conveyor belt, the center plate will move the valve body to the center of the first conveyor belt. When the valve body moves between the two clamping plates, the drive motor drives the lead screw to rotate. The rotation of the lead screw will drive the two sliding plates to move and the missing gear to rotate. The movement of the two sliding plates will drive the two U-shaped rods to move. The movement of the two U-shaped rods will drive the two clamping plates to move, thereby clamping the valve body.

[0017] S2: The synchronous rotation of the missing gear will drive the first gear to rotate, the rotation of the first gear will drive one of the pulleys to rotate, the rotation of the pulley will drive the belt to rotate, the rotation of the belt will drive another pulley to rotate, the rotation of the other pulley will drive the rotating rod to rotate, the rotation of the rotating rod will drive the second bevel gear to rotate, the rotation of the second bevel gear will drive the first bevel gear to rotate, the rotation of the first bevel gear will drive the third rotating shaft to rotate, the rotation of the third rotating shaft will drive the turntable to rotate, the rotation of the turntable will drive the two sleeves to rotate, the rotation of the two sleeves will drive the two sleeve rods to rotate, and the two sleeve rods will drive the two clamps to rotate, thereby allowing the two clamps to exchange positions.

[0018] S3: The rotation of the two sleeve rods will drive the two sliding columns to move. Due to the limiting effect of the annular inclined groove on the sliding columns, the two sleeve rods will move symmetrically. Furthermore, the two clamps can exchange positions and move up and down at the same time. This allows the clamp with the valve stem to be moved above the clamped valve body. Then the clamp releases the clamp on the valve stem, allowing the valve stem to enter the valve body for assembly.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. The present invention, through the arrangement of the circular roller and the annular inclined groove, allows two clamps to alternately clamp the valve stem, and the clamp closer to the clamping plate will also move downward, making it easier to bring the valve stem and valve body closer together, facilitating the assembly of the valve stem and valve body, and eliminating the need for manual handling to pick up the valve stem and assemble it onto the valve body, thus improving the accuracy and speed of assembly.

[0021] 2. The present invention, through the setting of clamping plate, missing gear and first gear, can clamp and fix the valve body on the first conveyor belt. In addition, when the clamping plate is moved, the turntable can be rotated, which facilitates the exchange of positions between the two clamps, further facilitating the continuous assembly of valve stem and valve body, thereby improving the efficiency of the equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an automatic valve processing and assembly equipment and its usage method proposed in this invention;

[0023] Figure 2 This is a rear view structural schematic diagram of an automatic valve processing and assembly equipment and its usage method proposed in this invention;

[0024] Figure 3 This is a bottom view of the first conveyor belt structure of an automatic valve processing assembly equipment and its usage method proposed in this invention;

[0025] Figure 4 This is a rear view schematic diagram of the first conveyor belt structure of an automatic valve processing assembly equipment and its usage method proposed in this invention;

[0026] Figure 5 This is a side view of the automatic assembly equipment and method for valve processing proposed in this invention.

[0027] Figure 6 for Figure 5 Enlarged schematic diagram of part B in the middle;

[0028] Figure 7 for Figure 3 An enlarged schematic diagram of part A in the middle;

[0029] Figure 8 This is a schematic cross-sectional view of the bottom of a strip box, representing an automatic valve processing assembly equipment and its usage method proposed in this invention.

[0030] Figure 9 for Figure 5 An enlarged schematic diagram of section C;

[0031] Figure 10 This is a schematic diagram of the circular roller structure of an automatic valve processing and assembly equipment and its usage method proposed in this invention.

[0032] In the diagram: 1. First conveyor belt; 2. Second conveyor belt; 3. Third conveyor belt; 4. L-shaped bracket; 5. Limiting block; 6. Rotating rod; 7. Turntable; 8. Circular roller; 9. Centering plate; 10. First bevel gear; 11. Second bevel gear; 12. Support leg; 13. Belt; 14. U-shaped rod; 15. Pulley; 16. Gear missing; 17. Annular inclined groove; 18. Sliding column; 19. Sleeve; 20. Sleeve rod; 21. Clamp; 22. First rotating shaft; 23. Second rotating shaft; 24. Slide plate; 25. Lead screw; 26. Drive motor; 27. Strip box; 28. First gear. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Please see the appendix Figure 1 - Appendix Figure 10 A valve assembly production line includes a first conveyor belt 1 and an L-shaped bracket 4. The vertical side of the L-shaped bracket 4 is vertically fixed at the center of the top side of the first conveyor belt 1, and a turntable 7 is horizontally rotatably mounted below the horizontal side of the L-shaped bracket 4. A circular roller 8 is vertically rotatably mounted at the center of the bottom of the turntable 7, and an annular inclined groove 17 is formed on the surface of the roller 8. Sliding columns 18 slide at both ends of the annular inclined groove 17. Clamps 21 are symmetrically mounted at both ends of the bottom of the turntable 7. A strip box 27 is horizontally fixedly mounted at the bottom of the first conveyor belt 1, and a missing gear 16 is rotatably mounted at one end of the strip box 27. A first gear 28 is rotatably mounted on one side of the first conveyor belt 1, and the first gear 28 and the missing gear 16 mesh. Sliding columns 16 slide on both sides of the top of the first conveyor belt 1. The device includes a clamping plate and a synchronous moving mechanism inside the strip box 27 for synchronously moving the two clamping plates. The top of the horizontal side of the L-shaped bracket 4 is equipped with a rotating mechanism for rotating the turntable 7. The first conveyor belt 1 is equipped with a second conveyor belt 2 and a third conveyor belt 3 at both ends, and the second conveyor belt 2 and the third conveyor belt 3 are symmetrically arranged. The top of the first conveyor belt 1 is fixedly installed on both sides of the side closest to the second conveyor belt 2, and the two centering plates 9 are symmetrically arranged. The bottom of the first conveyor belt 1, the second conveyor belt 2 and the third conveyor belt 3 are all equipped with support legs 12. With the configuration of this device, the valve stem and valve body can be assembled quickly and effortlessly, without the need for manual handling of heavy valve bodies, which helps to reduce the labor intensity of workers and improve the efficiency of assembly.

[0036] Please see the appendix Figure 1 - Appendix Figure 6In a preferred embodiment, a third rotating shaft is vertically fixed at the top center of the turntable 7, and the top end of the third rotating shaft is rotatably mounted on the bottom of the horizontal side of the L-shaped bracket 4. A first rotating shaft 22 is fixedly mounted at the bottom center of the turntable 7, and the end of the first rotating shaft 22 is rotatably mounted at the top center of the roller 8. A second rotating shaft 23 is fixedly mounted at the bottom center of the roller 8, and the end of the second rotating shaft 23 is fixedly mounted on one side of the top of the first conveyor belt 1. Sleeves 19 are vertically fixedly mounted at both ends of the bottom of the turntable 7, and sleeve rods 20 slide inside both sleeves 19. The ends of both sleeve rods 20 pass through the ends of the sleeves 19 and are respectively fixedly mounted on the top of the two clamps 21. The other two ends of the two sliding columns 18 are respectively fixedly mounted on the opposite side ends of the two sleeve rods 20. The second rotating shaft 23 is used to limit the roller 8 and ensure the stability of the roller 8. The annular inclined groove 17 is used to limit the two sliding columns 18 and to allow the two clamps 21 to move up and down.

[0037] Please see the appendix Figure 6 - Appendix Figure 8 In a preferred embodiment, the synchronous movement mechanism includes: a sliding plate 24 and a lead screw 25. There are two sliding plates 24, which slide on both ends of the inside of the strip box 27. U-shaped rods 14 are fixedly installed on the opposite sides of the two clamping plates. The other ends of the two U-shaped rods 14 are fixedly installed on the opposite sides of the two sliding plates 24. The lead screw 25 is horizontally rotatably installed inside the strip box 27, and its surface is threaded to the inside of the two sliding plates 24. The threads connecting the lead screw 25 to the two sliding plates 24 are in opposite directions. A drive motor 26 is installed on one end of the inside of the strip box 27, and the output shaft of the drive motor 26 is installed at the center of one end of the lead screw 25. The end of the lead screw 25 and the side of the missing gear 16 are fixedly installed with the same connecting shaft. The synchronous movement mechanism is used to move the two clamping plates, which facilitates clamping and limiting the valve body, ensuring that the valve stem and valve body are in the same vertical plane during assembly, thus improving the accuracy of assembly.

[0038] Please see the appendix Figure 3 - Appendix Figure 9In a preferred embodiment, the rotating mechanism includes a first bevel gear 10 and a rotating rod 6. The first bevel gear 10 is rotatably mounted on the top of the horizontal side of the L-shaped bracket 4, and a connecting shaft is fixedly installed between the bottom of the first bevel gear 10 and the third rotating shaft. A second bevel gear 11 meshes with one side of the first bevel gear 10, and a limiting block 5 is fixedly installed on the top of the horizontal side of the L-shaped bracket 4. The top of the rotating rod 6 is fixedly installed at the center of one side of the second bevel gear 11, and the surface of the rotating rod 6 is rotatably mounted inside the limiting block 5. A belt 13 is vertically rotatably mounted on one side of the vertical side of the L-shaped bracket 4. Furthermore, both ends of the belt 13 are equipped with pulleys 15. One pulley 15 is fixedly installed at the end of the rotating rod 6, and the other pulley 15 is fixedly installed at the center of one side of the first gear 28. Through the setting of the rotating mechanism, the movement of the clamping plate and the rotation of the turntable 7 can be synchronized, ensuring the synchronicity of the equipment operation. In addition, the setting of the limiting block 5 is used to limit the rotating rod 6, so that the rotating rod 6 can only rotate and not move horizontally. The setting of the missing gear 16 is used to drive the first gear 28 to rotate, which ultimately facilitates the movement of the two clamps 21.

[0039] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects: First, the valve body is placed on the second conveyor belt 2, and then the valve stem is placed below the clamp 21 and held by the clamp 21. The second conveyor belt 2 will transport the valve body to the first conveyor belt 1. When the valve body moves on the first conveyor belt 1, the centering plate 9 will cause the valve body to move at the center of the first conveyor belt 1. When the valve body moves between the two clamping plates, the drive motor 26 drives the lead screw 25 to rotate. The rotation of the lead screw 25 will drive the two slide plates 24 to move and the missing gear 16 to rotate. The movement of the two slide plates 24 will drive the two U-shaped rods 14 to move. The movement of the two U-shaped rods 14 will drive the two clamping plates to move, thereby clamping the valve body. The synchronous rotation of the missing gear 16 will drive the first gear 28 to rotate. The rotation of the first gear 28 will drive one of the pulleys 15 to rotate. The rotation of one of the pulleys 15 will drive the belt 13 to rotate. The rotation of the belt 13 will drive the other pulley 15 to rotate. The rotation of the other pulley 15 will drive the belt 13 to rotate. The rotating rod 6 rotates, which in turn rotates the second bevel gear 11, which in turn rotates the first bevel gear 10, which in turn rotates the third shaft, which in turn rotates the turntable 7, which in turn rotates the two sleeves 19, which in turn rotates the two sleeve rods 20, which in turn rotates the two clamps 21, thus allowing the two clamps 21 to exchange positions. The rotation of the two sleeve rods 20 causes the two sliding columns 18 to move. Due to the limiting effect of the annular inclined groove 17 on the sliding columns 18, the two sleeve rods 20 will move symmetrically (one moves upward and the other moves downward). Furthermore, the two clamps 21 can exchange positions and move up and down at the same time, so that the clamp 21 with the valve stem can be moved above the clamped valve body. Then the clamp 21 releases the clamp on the valve stem, allowing the valve stem to enter the valve body for assembly. This eliminates the need for manual handling of the heavy valve body, thereby improving the convenience and efficiency of the equipment.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A valve assembly production line comprising a first conveyor belt (1) and an L-shaped support (4), characterized in that, The vertical edge of the L-shaped support (4) is vertically fixedly installed at the center of one side of the top of the first conveying belt (1), and the horizontal edge of the L-shaped support (4) is horizontally rotatably provided with a rotating disc (7) below, the rotating disc (7) is vertically rotatably provided with a round roller (8) at the center below, and the surface of the round roller (8) is provided with an annular inclined chute (17), the annular inclined chute (17) is slidably provided with a slide column (18) at both ends, a clamp (21) is arranged at both symmetrically ends below the bottom of the rotating disc (7), a strip-shaped box (27) is horizontally fixedly installed at the bottom of the first conveying belt (1), and a missing tooth gear (16) is rotatably installed at one side end of the strip-shaped box (27), a first gear (28) is rotatably installed at one side of the first conveying belt (1), and the first gear (28) is engaged with the missing tooth gear (16), a clamping plate is slidably arranged at both sides of the top of the first conveying belt (1), and a synchronous moving mechanism for synchronously moving the two clamping plates is arranged in the strip-shaped box (27), and a rotating mechanism for rotating the rotating disc (7) is arranged at the top of the horizontal edge of the L-shaped support (4). A third rotating shaft is vertically fixedly installed at the center of the top of the rotating disc (7), and the top end of the third rotating shaft is rotatably installed at the bottom of the horizontal edge of the L-shaped support (4), and a first rotating shaft (22) is fixedly installed at the center of the bottom of the rotating disc (7), and the end of the first rotating shaft (22) is rotatably installed at the center of the top of the round roller (8). A second rotating shaft (23) is fixedly installed at the center of the bottom of the round roller (8), and the end of the second rotating shaft (23) is fixedly installed at the top of one side of the first conveying belt (1). A sleeve (19) is vertically fixedly installed at both ends of the bottom of the rotating disc (7), and a sleeve rod (20) is slidably arranged in each of the two sleeves (19), the ends of the two sleeve rods (20) pass through the ends of the sleeves (19) and are fixedly installed at the top of the two clamps (21) respectively, and the other two ends of the two slide columns (18) are fixedly installed at the end of the opposite side of the two sleeve rods (20).

2. The valve kit assembly line of claim 1, wherein, Second and third conveying belts (2) and (3) are respectively installed at both ends of the first conveying belt (1), and the second and third conveying belts (2) and (3) are symmetrically arranged at the center, and a centering plate (9) is fixedly installed at both sides of the first conveying belt (1) near one side of the second conveying belt (2) at the top, and the two centering plates (9) are symmetrically arranged, and supporting legs (12) are arranged at the bottom of the first, second and third conveying belts (1), (2) and (3).

3. A valve kit assembly line according to claim 2, wherein, The synchronous moving mechanism comprises slide plates (24) and lead screws (25), the two slide plates (24) are slidably arranged at both ends in the strip-shaped box (27), U-shaped rods (14) are fixedly installed at the sides of the two slide plates (24) away from each other, and the other two ends of the two U-shaped rods (14) are fixedly installed at the end of the side of the two slide plates (24) away from each other.

4. The valve kit assembly line of claim 3, wherein, The lead screw (25) is horizontally rotatably installed in the strip-shaped box (27), and the surface of the lead screw (25) is threadedly connected to the inside of the two slide plates (24), and the thread directions of the lead screw (25) connected to the two slide plates (24) are opposite.

5. The valve kit assembly line of claim 4, wherein, The driving motor (26) is installed at one side end of the inside of the box (27), and the output shaft of the driving motor (26) is installed at the center of one end of the screw rod (25), and the same connecting shaft is fixedly installed at the end of the screw rod (25) and one side of the gear with missing teeth (16).

6. The valve kit assembly line of claim 5, wherein, The rotating mechanism comprises a first bevel gear (10) and a rotating rod (6), the first bevel gear (10) is rotatably installed at the top of the horizontal side of the L-shaped support (4), and the same connecting shaft is fixedly installed between the bottom of the first bevel gear (10) and the third rotating shaft, one side of the first bevel gear (10) is engaged with a second bevel gear (11), and the top of the horizontal side of the L-shaped support (4) is fixedly installed with a limiting block (5), the top end of the rotating rod (6) is fixedly installed at the center of one side of the second bevel gear (11), and the surface of the rotating rod (6) is rotatably installed in the limiting block (5), the vertical side of the vertical side of the L-shaped support (4) is vertically rotatably provided with a belt (13), and both ends of the belt (13) are provided with pulleys (15), one of the pulleys (15) is fixedly installed at the end of the rotating rod (6), and the other pulley (15) is fixedly installed at the center of one side of the first gear (28).

7. The method of claim 6, wherein the valve assembly is machined in a single operation. The method comprises the following steps: S1: first, the valve body is placed on the second conveying belt (2), and the valve stem is clamped below the clamp (21) by the clamp (21), the second conveying belt (2) conveys the valve body to the first conveying belt (1), when the valve body moves on the first conveying belt (1), the centering plate (9) moves the valve body to the center of the first conveying belt (1), when the valve body moves between the two clamping plates, the driving motor (26) drives the screw rod (25) to rotate, the rotation of the screw rod (25) drives the two sliding plates (24) to move and the gear with missing teeth (16) to rotate, the movement of the two sliding plates (24) drives the two U-shaped rods (14) to move, and the movement of the two U-shaped rods (14) drives the two clamping plates to move, so that the valve body can be clamped; S2: the synchronous rotation of the gear with missing teeth (16) drives the first gear (28) to rotate, the rotation of the first gear (28) drives one of the pulleys (15) to rotate, the rotation of the pulley (15) drives the belt (13) to rotate, the rotation of the belt (13) drives the other pulley (15) to rotate, the rotation of the other pulley (15) drives the rotating rod (6) to rotate, the rotation of the rotating rod (6) drives the second bevel gear (11) to rotate, the rotation of the second bevel gear (11) drives the first bevel gear (10) to rotate, the rotation of the first bevel gear (10) drives the third rotating shaft to rotate, the rotation of the third rotating shaft drives the rotating disc (7) to rotate, the rotation of the rotating disc (7) drives the two sleeves (19) to rotate, the rotation of the two sleeves (19) drives the two sleeve rods (20) to rotate, and the two sleeve rods (20) drive the two clamps (21) to rotate, so that the two clamps (21) can exchange positions; S3: two sleeve rods (20) rotating will drive two slide columns (18) to move, due to the limiting effect of the annular chute (17) on the slide column (18), it will make two sleeve rods (20) symmetrical movement, further can make two clamps (21) exchange position while also moving up and down, then can move the clamp (21) with valve rod to the valve body above which is clamped, then the clamp (21) releases the clamping of the valve rod, which will make the valve rod enter the valve body for assembly.

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