Multifunctional clamping and positioning device for valve body machining

Abstract

The utility model discloses a multifunctional clamping and positioning device for machining a valve body, which comprises a bottom frame, and sliding rails are symmetrically mounted on the top surface of the bottom frame; the positioning mechanism comprises sliding plates which are symmetrically arranged, the sliding plates are perpendicular to the sliding rails, the sliding plates are slidably connected to the sliding rails, and a plurality of positioning rods are vertically and fixedly connected to the top surfaces of the sliding plates at equal intervals; the opening and closing assembly comprises a supporting plate fixedly connected between the two sliding rails, the supporting plate is provided with the opening and closing assembly, the opening and closing assembly is rotationally connected with the two sliding plates, and the opening and closing assembly is used for controlling the two sliding plates to slide on the sliding rails; the clamping mechanism comprises a base plate fixedly connected to the top face of the opening and closing assembly, and a clamping assembly is installed on the top face of the base plate; a plurality of positioning grooves are formed in the side wall of the base plate, and limiting assemblies are installed on the positioning rods. The clamping stability is guaranteed, meanwhile, the clamping mechanism and the positioning mechanism are matched to clamp a special-shaped workpiece, and the application range of the device is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning jigs, in particular to a multifunctional clamping and positioning device for processing valve bodies. Background Technique

[0002] In the fields of oil extraction and drilling technology, as a key vulnerable component, the performance of the valve body directly affects the production efficiency and safety of the entire pump valve assembly and even the oil and gas well. The valve body is usually used in cooperation with a rubber ring to achieve the extrusion and transportation of liquid under high-pressure environment. However, due to the harsh working environment, the valve body often faces problems such as wear and aging, and needs to be disassembled, repaired and replaced frequently. Therefore, the processing accuracy and installation stability of the valve body are particularly important.

[0003] During the processing of the valve body, there are many deficiencies in the traditional clamping and positioning devices. Firstly, the traditional jigs are often single in design and difficult to adapt to the complex and variable shapes and size requirements of the valve body, resulting in difficult-to-guarantee processing accuracy. Secondly, the clamping force of the traditional jig is not easy to adjust, and it is easy to cause surface damage or internal deformation of the valve body during processing, affecting the service performance of the valve body. In addition, the clamping stability of the traditional jig is poor. Especially in the environment of high-speed rotation or high-pressure impact, the valve body is prone to loosen or even fall off, bringing great potential safety hazards to production.

[0004] Based on the above technical problems, the utility model provides a multifunctional clamping and positioning device for processing valve bodies. Content of the Utility Model

[0005] The purpose of the utility model is to provide a multifunctional clamping and positioning device for processing valve bodies to solve the problems existing in the prior art.

[0006] To achieve the above purpose, the utility model provides the following scheme: The utility model provides a multifunctional clamping and positioning device for processing valve bodies, including:

[0007] A chassis, on the top surface of which slide rails are symmetrically installed;

[0008] A positioning mechanism, the positioning mechanism includes symmetrically arranged sliding plates, the sliding plates are vertically arranged with respect to the slide rails, the sliding plates are slidably connected to the slide rails, and a plurality of positioning rods are vertically and fixedly connected to the top surface of the sliding plates at equal intervals;

[0009] An opening and closing assembly, the opening and closing assembly includes a support plate fixedly connected between the two slide rails, an opening and closing assembly is installed on the support plate, the opening and closing assembly is rotatably connected to the two sliding plates, and the opening and closing assembly is used to control the two sliding plates to slide on the slide rails;

[0010] The clamping mechanism, the clamping mechanism includes a backing plate fixedly connected to the top surface of the opening and closing assembly, and a clamping assembly is installed on the top surface of the backing plate;

[0011] Wherein, a plurality of positioning grooves are formed in the side wall of the backing plate, the positioning grooves are correspondingly arranged with the positioning rods, a limiting assembly is installed on the positioning rods, and the limiting assembly is in limiting cooperation with the backing plate.

[0012] According to the multi-functional clamping and positioning device for valve body processing provided by the present invention, the opening and closing assembly includes a connecting plate, a through hole is formed in the middle of the connecting plate, a connecting sleeve is fixedly connected in the through hole, the connecting sleeve is rotatably connected to the top surface of the support plate, the two ends of the connecting plate are respectively rotatably connected with connecting arms, and the ends of the two connecting arms away from the connecting plate are respectively rotatably connected to the middle parts of one sides of the two sliding plates. A driving motor is fixedly connected to the bottom surface of the support plate, an output shaft of the driving motor is fixedly connected with a connecting shaft, the connecting shaft passes through the support plate, the connecting sleeve, the backing plate, and directional assemblies are installed on the backing plate and the connecting sleeve respectively, and the backing plate and the connecting sleeve are respectively in transmission cooperation with the connecting shaft through the directional assemblies.

[0013] According to the multi-functional clamping and positioning device for valve body processing provided by the present invention, the directional assembly includes two internal tooth ratchets. The internal tooth ratchet of the directional assembly on the connecting sleeve is fixedly connected to the bottom of the connecting sleeve and is rotatably connected to the support plate. One end of the internal tooth ratchet of the directional assembly on the backing plate is fixedly connected with a clamping plate, a clamping groove is formed at the center position of the bottom surface of the backing plate, the clamping plate is clamped in the clamping groove, the top end of the connecting shaft passes through the internal tooth ratchet and is rotatably connected to the clamping plate, two sliding grooves are formed in the side wall of the connecting shaft, the two sliding grooves are respectively correspondingly arranged with the two internal tooth ratchets, the axis of the sliding groove is perpendicular to the axis of the connecting shaft, a clamping block is slidably connected in the sliding groove, the cross-sectional shape of the clamping block is a right trapezoid, and a first spring is fixedly connected in the sliding groove, and two ends of the first spring are respectively fixedly connected with the inner wall of the sliding groove and the clamping block;

[0014] Wherein, the tooth directions of the two internal tooth ratchets are opposite, and the two clamping blocks are respectively correspondingly arranged with the two internal tooth ratchets.

[0015] According to the multi-functional clamping and positioning device for valve body processing provided by the present utility model, the clamping assembly includes a mounting frame fixedly connected to the top surface of the backing plate. The mounting frame is of a polygonal structure, and a toothed plate is slidably connected to each side of the mounting frame. The toothed plate is perpendicular to the frame of the mounting frame. A transmission assembly is installed on the mounting frame, and several toothed plates are all in transmission cooperation with the transmission assembly. One end of the toothed plate located inside the mounting frame is provided with a through groove along the length direction. A connecting rod is slidably connected in the through groove. One end of the connecting rod is fixedly connected with a positioning plate. The positioning plate is perpendicular to the connecting rod and is parallel to the axis of the mounting frame. A second spring is fixedly connected in the through groove, and both ends of the second spring are fixedly connected with the inner wall of the through groove and the end of the connecting rod respectively.

[0016] According to the multi-functional clamping and positioning device for valve body processing provided by the present utility model, the transmission assembly includes several transmission gears. Several transmission gears are arranged in one-to-one correspondence with several toothed plates. The transmission gears are rotatably connected to the mounting frame, and adjacent transmission gears are in transmission cooperation through a coupling. A transmission motor is fixedly connected to the mounting frame, and the transmission motor is axially connected to one of the couplings.

[0017] According to the multi-functional clamping and positioning device for valve body processing provided by the present utility model, an anti-slip pattern is provided on the side of the positioning plate away from the connecting rod.

[0018] According to the multi-functional clamping and positioning device for valve body processing provided by the present utility model, the limiting assembly includes two positioning nuts. Both positioning nuts are threadedly connected to the positioning rod, and the backing plate is arranged between the two positioning nuts.

[0019] According to the multi-functional clamping and positioning device for valve body processing provided by the present utility model, positioning telescopic rods are symmetrically and fixedly connected to the top surface of the bottom frame. The positioning telescopic rods are parallel to the slide rails, and the two slide rails are arranged between the two positioning telescopic rods. The end of the positioning telescopic rod is fixedly connected to the side surface of one of the sliding plates.

[0020] The present utility model discloses the following technical effects:

[0021] When the present utility model works, the workpiece is placed on the top surface of the backing plate and is clamped and locked by the clamping assembly. Then, the backing plate is placed on the top end of the opening and closing assembly. The opening and closing assembly works to drive the two sliding plates to slide towards each other. The positioning rods on the sliding plates correspond to the positioning grooves on the backing plate to realize the positioning of the backing plate. At the same time, the clamping of the backing plate is realized through the limiting assembly on the positioning rod. The device can be clamped on a rotary table or fixed on a flat machine frame through the bottom frame.

[0022] This utility model ensures the stability of clamping. Meanwhile, through the cooperation of the clamping mechanism and the positioning mechanism, the clamping of special-shaped workpieces can be realized, improving the application range of the device. Brief Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the multi-functional clamping and positioning device for processing the valve body of the present utility model;

[0025] Figure 2 It is a schematic structural diagram of the positioning mechanism of the present utility model;

[0026] Figure 3 It is a schematic structural diagram of the clamping mechanism of the present utility model;

[0027] Figure 4 For Figure 3 the enlarged view of part A in

[0028] Figure 5 It is a schematic structural diagram of the orientation component of the present utility model;

[0029] Figure 6 It is a schematic diagram of the cooperation relationship between the toothed plate and the connecting rod of the present utility model.

[0030] Among them, 1. chassis; 2. slide rail; 3. slide plate; 4. positioning rod; 5. support plate; 6. backing plate; 7. positioning groove; 8. connecting plate; 9. connecting sleeve; 10. connecting arm; 11. connecting shaft; 12. internal gear ratchet; 13. clamping plate; 14. clamping groove; 15. chute; 16. clamping block; 17. first spring; 18. mounting bracket; 19. toothed plate; 20. through groove; 21. connecting rod; 22. positioning plate; 23. second spring; 24. transmission gear; 25. coupling; 26. transmission motor; 27. positioning nut; 28. positioning telescopic rod. Specific Embodiments

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0032] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Referring Figures 1-6 , the present utility model provides a multi-functional clamping and positioning device for valve body processing, including:

[0034] A chassis 1, on the top surface of which slide rails 2 are symmetrically installed;

[0035] A positioning mechanism, which includes symmetrically arranged sliding plates 3. The sliding plates 3 are perpendicularly arranged with respect to the slide rails 2. The sliding plates 3 are slidably connected to the slide rails 2, and a plurality of positioning rods 4 are perpendicularly and equally spaced and fixedly connected to the top surface of the sliding plates 3;

[0036] An opening and closing assembly, which includes a support plate 5 fixedly connected between the two slide rails 2. An opening and closing assembly is installed on the support plate 5. The opening and closing assembly is rotatably connected to the two sliding plates 3, and the opening and closing assembly is used to control the sliding of the two sliding plates 3 on the slide rails 2;

[0037] A clamping mechanism, which includes a backing plate 6 fixedly connected to the top surface of the opening and closing assembly. A clamping assembly is installed on the top surface of the backing plate 6;

[0038] Among them, a plurality of positioning grooves 7 are formed in the side wall of the backing plate 6. The positioning grooves 7 are correspondingly arranged with the positioning rods 4. A limiting assembly is installed on the positioning rods 4, and the limiting assembly is in limiting cooperation with the backing plate 6.

[0039] The backing plate 6 is a regular polygon or circular structure;

[0040] When the present utility model works, the workpiece is placed on the top surface of the backing plate 6 and clamped and locked by the clamping assembly. Then, the backing plate 6 is placed on the top of the opening and closing assembly. The opening and closing assembly works to drive the two sliding plates 3 to slide towards each other. The positioning rods 4 on the sliding plates 3 correspond to the positioning grooves 7 on the backing plate 6 to realize the positioning of the backing plate 6. At the same time, the clamping of the backing plate 6 is realized through the limiting assembly on the positioning rods 4. The device can be clamped on a rotary table or fixed on a flat frame through the chassis 1.

[0041] The present utility model ensures the stability of clamping. At the same time, through the cooperation of the clamping mechanism and the positioning mechanism, the clamping of special-shaped workpieces can be realized, improving the application range of the device.

[0042] For a further optimized solution, the opening and closing assembly includes a connecting plate 8. A through hole is formed in the middle of the connecting plate 8. A connecting sleeve 9 is fixedly connected in the through hole. The connecting sleeve 9 is rotatably connected to the top surface of the support plate 5. The two ends of the connecting plate 8 are respectively rotatably connected with connecting arms 10. The two ends of the two connecting arms 10 far away from the connecting plate 8 are respectively rotatably connected to the middle parts of one side of the two sliding plates 3. A driving motor is fixedly connected to the bottom surface of the support plate 5. The output shaft of the driving motor is fixedly connected with a connecting shaft 11. The connecting shaft 11 passes through the support plate 5 and the connecting sleeve 9. Orientation assemblies are respectively installed on the cushion plate 6 and the connecting sleeve 9. The cushion plate 6 and the connecting sleeve 9 are respectively in transmission cooperation with the connecting shaft 11 through the orientation assemblies.

[0043] For a further optimized solution, the orientation assembly includes two internal tooth ratchets 12. The internal tooth ratchet 12 of the orientation assembly on the connecting sleeve 9 is fixedly connected to the bottom of the connecting sleeve 9 and is rotatably connected to the support plate 5. One end of the internal tooth ratchet 12 of the orientation assembly on the cushion plate 6 is fixedly connected with a clamping plate 13. A clamping groove 14 is formed at the center position of the bottom surface of the cushion plate 6. The clamping plate 13 is clamped in the clamping groove 14. The top end of the connecting shaft 11 passes through the internal tooth ratchet 12 and is rotatably connected to the clamping plate 13. Two sliding grooves 15 are formed on the side wall of the connecting shaft 11. The two sliding grooves 15 are respectively arranged corresponding to the two internal tooth ratchets 12. The axis of the sliding groove 15 is perpendicular to the axis of the connecting shaft 11. A clamping block 16 is slidably connected in the sliding groove 15. The cross-sectional shape of the clamping block 16 is a right trapezoid. A first spring 17 is fixedly connected in the sliding groove 15. The two ends of the first spring 17 are respectively fixedly connected with the inner wall of the sliding groove 15 and the clamping block 16.

[0044] Wherein, the tooth directions of the two internal tooth ratchets 12 are opposite, and the two clamping blocks 16 are respectively arranged corresponding to the two internal tooth ratchets 12.

[0045] In this embodiment, the rotation of the connecting shaft 11 is controlled by the driving motor. When the connecting shaft 11 rotates forward, the clamping block 16 at the top end forms a loose state with the corresponding internal tooth ratchet 12, and the clamping block 16 at the bottom forms a locked state with the internal tooth ratchet 12. In this way, the connecting plate 8 can be driven to rotate. By pushing the connecting arm 10 through the connecting plate 8, the connecting arm 10 pushes the two sliding plates 3 to slide in the direction away from each other, so that the positioning rod 4 is disengaged from the positioning groove 7. When the connecting shaft 11 rotates reversely, the top is locked and the bottom is loosened. In this way, the top cushion plate 6 can be driven to rotate, so as to adjust the angle of the workpiece.

[0046] In this embodiment, an arc-shaped block is arranged at the bottom of the cushion plate 6. The arc-shaped block is slidably matched with the top of the fixed end of the positioning telescopic rod 28, so as to ensure the stability of the cushion plate 6.

[0047] For a further optimized solution, the clamping assembly includes a mounting frame 18 fixedly connected to the top surface of the backing plate 6. The mounting frame 18 has a polygonal structure, and a toothed plate 19 is slidably connected to each side of the mounting frame 18. The toothed plate 19 is perpendicular to the frame of the mounting frame 18. A transmission assembly is installed on the mounting frame 18, and several toothed plates 19 are all in transmission cooperation with the transmission assembly. One end of the toothed plate 19 located inside the mounting frame 18 is provided with a through groove 20 along the length direction. A connecting rod 21 is slidably connected in the through groove 20. One end of the connecting rod 21 is fixedly connected with a positioning plate 22. The positioning plate 22 is perpendicular to the connecting rod 21, and the positioning plate 22 is parallel to the axis of the mounting frame 18. A second spring 23 is fixedly connected in the through groove 20, and both ends of the second spring 23 are fixedly connected with the inner wall of the through groove 20 and the end of the connecting rod 21 respectively.

[0048] For a further optimized solution, the transmission assembly includes several transmission gears 24. Several transmission gears 24 are arranged in one-to-one correspondence with several toothed plates 19. The transmission gears 24 are rotatably connected to the mounting frame 18, and adjacent transmission gears 24 are in transmission cooperation through a coupling 25. A transmission motor 26 is fixedly connected to the mounting frame 18, and the transmission motor 26 is axially connected to one of the couplings 25.

[0049] For a further optimized solution, an anti-slip pattern is provided on the side of the positioning plate 22 away from the connecting rod 21. The setting of the anti-slip pattern ensures the stability of clamping.

[0050] In this embodiment, the transmission motor 26 is controlled to rotate the coupling 25, thereby driving the rotation of multiple transmission gears 24. The multiple transmission gears 24 respectively control the sliding of the toothed plates 19 on the mounting frame 18, pushing the connecting rod 21 and the positioning plate 22 at the end of the connecting rod 21 to close, realizing the positioning and clamping of the workpiece in the middle part. At the same time, when partial positions come into contact, the toothed plate 19 continues to push, and the connecting rod 21 will compress the second spring 23 and thus retract, while other parts remain extended under the action of the second spring 23. In this way, multiple groups of positioning plates 22 can be in contact with the workpiece, enabling the device to be applicable to the clamping of irregular parts.

[0051] For a further optimized solution, the limiting assembly includes two positioning nuts 27. Both positioning nuts 27 are threadedly connected to the positioning rod 4, and the backing plate 6 is arranged between the two positioning nuts 27.

[0052] The positioning of the backing plate 6 can be achieved through the setting of the positioning nut 27. Meanwhile, in this embodiment, the connecting shaft 11 is set as a hydraulic telescopic rod, and the two sets of sliding grooves 15 are respectively arranged at the fixed end and the telescopic end of the hydraulic telescopic rod, so that the relative height of the backing plate 6 can be adjusted.

[0053] In a further optimized solution, symmetrically fixedly connected to the top surface of the chassis 1 are positioning telescopic rods 28. The positioning telescopic rods 28 are arranged in parallel with the slide rails 2, and the two slide rails 2 are arranged between the two positioning telescopic rods 28. The end of the positioning telescopic rod 28 is fixedly connected to the side surface of one of the sliding plates 3.

[0054] In this embodiment, the setting of the positioning telescopic rods 28 can ensure that the sliding plates 3 slide stably along the direction of the slide rails 2. By controlling the rotation of the connecting shaft 11 by the driving motor to drive the connecting plate 8 to rotate, the two connecting arms 10 respectively exert a pushing or pulling effect on the two sliding plates 3, so as to control the two sliding plates 3 to slide in the directions of moving away from or approaching each other.

[0055] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0056] The above-described embodiments are only descriptions of the preferred modes of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A multi-functional clamping and positioning device for valve body processing, characterized in that, Comprising: A chassis (1), on the top surface of which slide rails (2) are symmetrically installed; A positioning mechanism, the positioning mechanism includes symmetrically arranged sliding plates (3), the sliding plates (3) are vertically arranged with respect to the slide rails (2), the sliding plates (3) are slidably connected to the slide rails (2), and a plurality of positioning rods (4) are vertically and fixedly connected to the top surface of the sliding plates (3) at equal intervals; An opening and closing assembly, the opening and closing assembly includes a support plate (5) fixedly connected between the two slide rails (2), an opening and closing assembly is installed on the support plate (5), the opening and closing assembly is rotatably connected to the two sliding plates (3), and the opening and closing assembly is used to control the sliding of the two sliding plates (3) on the slide rails (2); A clamping mechanism, the clamping mechanism includes a backing plate (6) fixedly connected to the top surface of the opening and closing assembly, and a clamping assembly is installed on the top surface of the backing plate (6); Wherein, a plurality of positioning grooves (7) are formed in the side wall of the backing plate (6), the positioning grooves (7) are arranged corresponding to the positioning rods (4), a limiting component is installed on the positioning rods (4), and the limiting component is in limiting cooperation with the backing plate (6).

2. A multi-functional clamping and positioning device for processing a valve body according to claim 1, characterized in that: The opening and closing assembly includes a connecting plate (8), a through hole is formed in the middle of the connecting plate (8), a connecting sleeve (9) is fixedly connected in the through hole, the connecting sleeve (9) is rotatably connected to the top surface of the support plate (5), the two ends of the connecting plate (8) are respectively rotatably connected with connecting arms (10), and the ends of the two connecting arms (10) far away from the connecting plate (8) are respectively rotatably connected to the middle parts of one sides of the two sliding plates (3). A driving motor is fixedly connected to the bottom surface of the support plate (5), an output shaft of the driving motor is fixedly connected with a connecting shaft (11), the connecting shaft (11) passes through the support plate (5), the connecting sleeve (9), the backing plate (6), and orientation components are respectively installed on the backing plate (6) and the connecting sleeve (9), and the backing plate (6) and the connecting sleeve (9) are respectively in transmission cooperation with the connecting shaft (11) through the orientation components.

3. A multi-functional clamping and positioning device for processing a valve body according to claim 2, characterized in that: The orientation component includes two internal gear ratchets (12). The internal gear ratchets (12) of the orientation component on the connecting sleeve (9) are fixedly connected to the bottom of the connecting sleeve (9) and are rotatably connected to the support plate (5). One end of the internal gear ratchet (12) of the orientation component on the backing plate (6) is fixedly connected with a clamping plate (13). A clamping groove (14) is formed at the center of the bottom surface of the backing plate (6). The clamping plate (13) is clamped in the clamping groove (14). The top end of the connecting shaft (11) passes through the internal gear ratchet (12) and is rotatably connected to the clamping plate (13). Two sliding grooves (15) are formed on the side wall of the connecting shaft (11). The two sliding grooves (15) are respectively arranged corresponding to the two internal gear ratchets (12). The axis of the sliding groove (15) is perpendicular to the axis of the connecting shaft (11). A clamping block (16) is slidably connected in the sliding groove (15). The cross-sectional shape of the clamping block (16) is a right trapezoid. A first spring (17) is fixedly connected in the sliding groove (15). Two ends of the first spring (17) are respectively fixedly connected to the inner wall of the sliding groove (15) and the clamping block (16). Wherein, the tooth directions of the two internal gear ratchets (12) are opposite, and the two clamping blocks (16) are respectively arranged corresponding to the two internal gear ratchets (12).

4. A multi-functional clamping and positioning device for processing a valve body according to claim 1, characterized in that: The clamping component includes a mounting frame (18) fixedly connected to the top surface of the backing plate (6). The mounting frame (18) is of a polygonal structure. A toothed plate (19) is slidably connected to each side of the mounting frame (18). The toothed plate (19) is perpendicular to the frame of the mounting frame (18). A transmission component is mounted on the mounting frame (18). A plurality of toothed plates (19) are all in transmission cooperation with the transmission component. A through groove (20) is formed in the length direction at one end of the toothed plate (19) located inside the mounting frame (18). A connecting rod (21) is slidably connected in the through groove (20). One end of the connecting rod (21) is fixedly connected with a positioning plate (22). The positioning plate (22) is perpendicular to the connecting rod (21). The positioning plate (22) is arranged parallel to the axis of the mounting frame (18). A second spring (23) is fixedly connected in the through groove (20). Two ends of the second spring (23) are respectively fixedly connected to the inner wall of the through groove (20) and the end of the connecting rod (21).

5. A multi-functional clamping and positioning device for processing a valve body according to claim 4, characterized in that: The transmission component includes a plurality of transmission gears (24). The plurality of transmission gears (24) are respectively arranged corresponding to the plurality of toothed plates (19). The transmission gears (24) are rotatably connected to the mounting frame (18), and adjacent transmission gears (24) are in transmission cooperation through a coupling (25). A transmission motor (26) is fixedly connected to the mounting frame (18). The transmission motor (26) is axially connected to one of the couplings (25).

6. The multi-functional clamping and positioning device for processing a valve body according to claim 4, characterized in that: The side of the positioning plate (22) away from the connecting rod (21) is provided with anti-slip lines.

7. A multi-functional clamping and positioning device for processing a valve body according to claim 1, characterized in that: The limiting component includes two positioning nuts (27), both of the two positioning nuts (27) are threadedly connected to the positioning rod (4), and the backing plate (6) is arranged between the two positioning nuts (27).

8. A multi-functional clamping and positioning device for processing a valve body according to claim 1, characterized in that: Symmetrically and fixedly connected to the top surface of the chassis (1) are positioning telescopic rods (28), the positioning telescopic rods (28) and the slide rails (2) are arranged in parallel, and the two slide rails (2) are arranged between the two positioning telescopic rods (28), and the end of the positioning telescopic rod (28) is fixedly connected to the side surface of one of the sliding plates (3).

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