Clamping tool for diaphragm valve

Abstract

The utility model relates to the field of clamping auxiliary equipment, and particularly discloses a clamping tool for a diaphragm valve, the clamping tool comprises a base and two hydraulic driving blocks movably arranged on the base, the two hydraulic driving blocks are oppositely arranged and are driven by a hydraulic system to get close to or get away from each other, a clamping block is fixed on each hydraulic driving block, and the clamping blocks are arranged on the base. The ends, close to each other, of the two clamping blocks form a clamping cavity, and the shape of the clamping cavity is matched with the overall shape of the valve body. The clamping device has the advantages of being stable in clamping, simple in structure and easy to implement.

Description

Technical Field

[0001] The present application relates to the field of clamping auxiliary equipment, and in particular to a clamping tool for a diaphragm valve. Background Art

[0002] Electric diaphragm valve is a valve driven by electric actuator, which controls the flow of fluid by using diaphragm as sealing element. Diaphragm valve is widely used in chemical industry, food processing, pharmaceutical, water treatment and other industrial processes, especially in the occasions where precise control and high sanitation requirements are required.

[0003] The diaphragm valve usually includes a valve body, a diaphragm, a valve stem and a valve cover. The diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper valve cover. The valve stem is located above the diaphragm and is connected to an electric actuator. The electric actuator controls the movement of the valve stem, thereby pressing down the diaphragm to close the valve body channel. The valve body of the diaphragm valve is a casting, which is integrally cast in the mold. However, due to the gap in the mold, there is an error in the shape of the valve body after molding. As a result, when the diaphragm valve and the electric actuator are assembled, the valve body and valve stem cannot be precisely matched with the electric actuator, which is not conducive to long-term use.

[0004] Therefore, the diaphragm valve needs to be processed twice before assembly, such as cutting and grinding the parts with errors in the valve body, to improve its compatibility with the electric actuator. However, due to the special-shaped structure of the diaphragm valve body and the irregular external structure, the commonly used three-jaw chuck cannot stably clamp the valve body, which in turn affects the accuracy of the secondary processing of the valve body. Utility Model Content

[0005] In order to improve the clamping stability of the diaphragm valve body, the present application provides a clamping tool for the diaphragm valve, which has the advantages of stable clamping, simple structure and easy implementation.

[0006] The present application provides a clamping tool for a diaphragm valve using the following technical solution:

[0007] A clamping tool for a diaphragm valve comprises a base and two hydraulic drive blocks movably arranged on the base, wherein the two hydraulic drive blocks are arranged opposite to each other and driven by a hydraulic system to move closer to or away from each other, and further comprises two clamping blocks, wherein the two clamping blocks are respectively fixed to the two hydraulic drive blocks, and when the two clamping blocks are close to each other, a clamping cavity is formed between the ends of the two clamping blocks that are close to each other, wherein the clamping cavity is adapted to the shape of a valve body, and the inner wall of the clamping cavity abuts against the valve body.

[0008] By adopting the above technical solution, two clamping blocks are used to form a clamping cavity to limit the valve body from multiple directions to improve the stability of clamping, and the inner wall of the clamping cavity surrounds the periphery of the valve body to form a protective effect, further ensuring the clamping effect.

[0009] Optionally, a clamping groove is provided on one side of the two clamping blocks close to each other, and when the two clamping blocks clamp the valve body, the two clamping grooves form a clamping cavity, and the side walls of the two clamping grooves on both sides of the groove are in contact with the valve body.

[0010] By adopting the above technical solution, by aligning the two clamping grooves to form a clamping cavity, the implementation is convenient, and the switching between the clamping and releasing states can be quickly achieved, thereby improving the convenience of use.

[0011] Optionally, a protrusion is formed at one end of the two mutually adjacent ends, and the protrusion extends in a direction away from the base, and when the two clamping blocks clamp the valve body, the valve body is located between the two protrusions.

[0012] By adopting the above technical solution, the protrusion can be provided to make the position of the valve body after being clamped and fixed away from the base and the clamping block, so as to avoid the secondary processing equipment and facilitate the processing of the valve body.

[0013] Optionally, a first limit block is arranged on the top of the hydraulic drive block along the moving direction of the hydraulic drive block, and a first limit groove is opened on the side wall of the clamping block for connecting the hydraulic drive block, and the first limit block extends into the first limit groove and is adapted to the shape of the first limit groove.

[0014] By adopting the above technical solution, the cooperation between the first limiting groove and the first limiting block can form a limit between the clamping block and the hydraulic drive block, thereby improving the stability of the cooperation between the two.

[0015] Optionally, a second limiting groove is provided on the top of the hydraulic drive block perpendicular to the extension direction of the first limiting block, and the side wall of the clamping block used to connect the hydraulic drive block is provided with a second limiting block, and the second limiting block extends into the second limiting groove and is adapted to the shape of the second limiting groove.

[0016] By adopting the above technical solution, the two limit blocks and the two limit grooves cooperate to form a cross-shaped limit structure, which further improves the matching accuracy and strength between the clamping block and the hydraulic drive block.

[0017] Optionally, a first limiting wedge block is arranged on the top of the hydraulic drive block along the moving direction of the hydraulic drive block, and a first limiting inclined groove is opened on the side wall of the clamping block used to connect the hydraulic drive block, and the first limiting wedge block abuts against the side wall of the first limiting inclined groove, and a second limiting inclined groove is opened on the top of the hydraulic drive block perpendicular to the extension direction of the first limiting wedge block, and the clamping block is correspondingly provided with a second limiting wedge block, and the second limiting wedge block abuts against the side wall of the second limiting inclined groove, and the spacing between the two side walls of the first limiting inclined groove gradually increases from the bottom of the groove to the groove mouth, and the spacing between the two side walls of the second limiting inclined groove gradually increases from the bottom of the groove to the groove mouth.

[0018] By adopting the above technical solution, when the limiting wedge block moves toward the hydraulic drive block under the action of the bolt, the inclined side wall of the limiting bevel groove gradually forms a clamping and fixing effect on the limiting wedge block, so that the limiting wedge block is stably fixed in the corresponding limiting bevel groove, and no misalignment space will be generated due to assembly or molding errors.

[0019] Optionally, the first limiting wedge block is provided with a first abutting inclined surface on the side wall corresponding to the first limiting inclined groove, and the second limiting wedge block is provided with a second abutting inclined surface on the side wall corresponding to the second limiting inclined groove.

[0020] By adopting the above technical solution, the two abutting inclined surfaces are used to abut against the inclined side walls of the limiting inclined groove, thereby increasing the contact area between the two and further improving the stability of the cooperation between the two.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The clamping cavity is formed by two clamping blocks to limit the valve body from multiple directions to improve the stability of clamping, and the inner wall of the clamping cavity surrounds the periphery of the valve body to form a protective effect, further ensuring the clamping effect; the clamping cavity is formed by aligning the two clamping grooves, which is convenient to implement and can quickly switch between the clamping and releasing states, thereby improving the convenience of use;

[0023] 2. By setting the protrusion, the position of the valve body after being clamped and fixed can be kept away from the base and the clamping block, so as to avoid the secondary processing equipment and facilitate the processing of the valve body;

[0024] 3. By setting an inclined side wall in the limiting bevel groove, when the limiting wedge block moves toward the hydraulic drive block under the action of the bolt, the inclined side wall of the limiting bevel groove gradually forms a clamping and fixing effect on the limiting wedge block, so that the limiting wedge block is stably fixed in the corresponding limiting bevel groove, and no misalignment space will be generated due to assembly or molding errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0026] Figure 2 is a schematic diagram showing a limit block and a limit groove in Example 1 of the present application;

[0027] Figure 3 is a schematic diagram showing the hydraulic drive block alone in Example 1 of the present application;

[0028] Figure 4 This is a schematic diagram of Example 2 of the present application showing a limiting wedge block and a limiting inclined groove.

[0029] Figure markings: 1. base; 2. hydraulic drive block; 3. clamping block; 4. clamping cavity; 41. clamping groove; 5. protrusion; 6. first limit block; 7. first limit groove; 8. second limit block; 9. second limit groove; 10. first limit wedge block; 11. first limit inclined groove; 12. second limit wedge block; 13. second limit inclined groove; 14. first abutting inclined surface; 15. second abutting inclined surface. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-4 This application is described in further detail.

[0031] A clamping fixture for a diaphragm valve, referring to Figure 1 , comprising a base 1 and two hydraulic drive blocks 2 movably arranged on the base 1, the two hydraulic drive blocks 2 are arranged opposite to each other and driven by a hydraulic system to move closer to or farther from each other. At the same time, a clamping block 3 is fixed on each of the two hydraulic drive blocks 2, the two clamping blocks 3 are arranged opposite to each other, and the two clamping blocks 3 move with the two hydraulic drive blocks 2, and move closer to or farther from each other under the drive of the hydraulic system to clamp or release the valve body.

[0032] Specifically, the ends of the two clamping blocks 3 that are close to each other are both provided with clamping grooves 41, and the notches of the two clamping grooves 41 are opposite to each other. When the ends of the two clamping blocks 3 are close to each other, the notches of the two clamping grooves 41 form a clamping cavity 4, and the shape of the clamping cavity 4 is adapted to the overall shape of the valve body. When in use, as the two clamping blocks 3 gradually approach each other, the notches of the two clamping grooves 41 gradually approach each other to form the clamping cavity 4, and the opposite side walls of the two clamping grooves 41 are pressed against the valve body to achieve clamping and fixing of the valve body.

[0033] Further, refer to Figure 1 When the two clamping blocks 3 clamp the valve body, the side walls on both sides of the two clamping grooves 41 abut against the valve body, that is, at this time, all the side walls of the clamping cavity 4 abut against the valve body, limiting the valve body from multiple directions to improve the clamping stability. The side walls of the clamping cavity 4 surround the periphery of the valve body, further improving the limiting effect on the valve body.

[0034] Further, refer to Figure 1 The ends of the two clamping blocks 3 close to each other are both formed with protrusions 5, the two protrusions 5 extend in a direction away from the base 1, and the two clamping grooves 41 are respectively provided at the two protrusions 5. When the two clamping blocks 3 clamp the valve body, the valve body is located between the two protrusions 5. By providing the protrusions 5, the position of the valve body after being clamped and fixed can be kept away from the base 1 and the clamping blocks 3, so as to avoid the secondary processing equipment and facilitate the processing of the valve body.

[0035] Embodiment 1:

[0036] Reference Figure 2 and Figure 3The top of the hydraulic drive block 2 is integrally formed with a first limiting block 6, which extends along its moving direction. The side wall of the clamping block 3 for connecting the hydraulic drive block 2 is provided with a first limiting groove 7, and the first limiting block 6 extends into the first limiting groove 7, and the shapes of the two are adapted. During assembly, the first limiting groove 7 on the clamping block 3 is aligned with the first limiting block 6, and after the two are adapted and fit, the clamping block 3 is fixed to the first limiting block 6 by bolts. The first limiting groove 7 and the first limiting block 6 cooperate to form a limit between the clamping block 3 and the hydraulic drive block 2, thereby improving the stability of the cooperation between the two.

[0037] Further, refer to Figure 2 and Figure 3 A second limiting groove 9 is provided on the top of the hydraulic drive block 2 perpendicular to the extension direction of the first limiting block 6, and the second limiting groove 9 disconnects the first limiting block 6. The side wall of the clamping block 3 used to connect the hydraulic drive block 2 is integrally formed with a second limiting block 8. When the first limiting block 6 extends into the first limiting groove 7, the second limiting block 8 is synchronously inserted into the second limiting groove 9 to form a cross-shaped limiting structure, further improving the connection strength and stability between the clamping block 3 and the hydraulic drive block 2, thereby improving the stability of the valve body clamping and improving the processing accuracy.

[0038] The implementation principle of Example 1 of the present application is: the two limit blocks and the two limit grooves cooperate to form a cross-shaped limit structure, which improves the matching accuracy and strength between the clamping block 3 and the hydraulic drive block 2.

[0039] Embodiment 2:

[0040] Reference Figure 4 The top of the hydraulic drive block 2 is integrally formed with a first limiting wedge 10, and the first limiting wedge 10 extends along the moving direction of the hydraulic drive block 2. The top of the hydraulic drive block 2 is provided with a second limiting inclined groove 13 perpendicular to the first limiting wedge 10, and the second limiting inclined groove 13 disconnects the first limiting wedge 10. At the same time, the side wall of the clamping block 3 used to connect the hydraulic drive block 2 is provided with a first limiting inclined groove 11, and the side wall is integrally formed with a second limiting wedge 12 perpendicular to the first limiting inclined groove 11. When the first limiting wedge 10 is inserted into the first limiting inclined groove 11, the second limiting wedge 12 is simultaneously inserted into the second limiting inclined groove 13 to form a cross-shaped limit.

[0041] Further, refer to Figure 4 The distance between the two side walls of the first limiting inclined groove 11 gradually increases from the groove bottom to the groove opening, and the distance between the two side walls of the second limiting inclined groove 13 also gradually increases from the groove bottom to the groove opening.

[0042] When the side wall of the limiting inclined groove is perpendicular to the groove bottom, there will be a certain gap between the side wall of the limiting inclined groove and the limiting block due to molding or assembly errors, which may cause a slight misalignment movement between the two when clamping the valve body, affecting the clamping accuracy.

[0043] In this embodiment, when assembling the clamping block 3, as the bolts are gradually tightened, the clamping block 3 gradually approaches the hydraulic drive block 2, and the end of the first limiting wedge 10 abuts against the two oblique side walls of the first limiting inclined groove 11, while the end of the second limiting wedge 12 abuts against the two oblique side walls of the second limiting inclined groove 13. When abutting, there is a gap between the first limiting wedge 10 and the bottom of the first limiting inclined groove 11, and there is a gap between the second limiting wedge 12 and the bottom of the second limiting inclined groove 13, so that the oblique side walls of the two limiting inclined grooves respectively form a clamping effect on the ends of the two limiting wedges, so that the limiting wedges are stably fixed in the corresponding limiting inclined grooves, and no misalignment space is generated due to assembly or molding errors.

[0044] Furthermore, the first limiting wedge block 10 is provided with a first abutting inclined surface 14 on the side wall corresponding to the first limiting inclined groove 11, and the second limiting wedge block 12 is provided with a second abutting inclined surface 15 on the side wall corresponding to the second limiting inclined groove 13. When the limiting wedge block is inserted into the corresponding limiting inclined groove, the abutting inclined surface tightly abuts against the inclined side wall of the limiting inclined groove, further improving the stability of the cooperation between the two.

[0045] The implementation principle of Example 2 of the present application is: when the limiting wedge block moves toward the hydraulic drive block 2 under the action of the bolt, the inclined side wall of the limiting inclined groove gradually forms a clamping and fixing effect on the limiting wedge block, further improving the matching accuracy and strength between the clamping block 3 and the hydraulic drive block 2.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A clamping tool for a diaphragm valve, comprising a base (1) and two hydraulic drive blocks (2) movably arranged on the base (1), wherein the two hydraulic drive blocks (2) are arranged opposite to each other and driven by a hydraulic system to move closer to or farther from each other, and characterized in that: It also comprises two clamping blocks (3), the two clamping blocks (3) being respectively fixed to the two hydraulic drive blocks (2); when the two clamping blocks (3) are close to each other, a clamping cavity (4) is formed between the ends of the two clamping blocks (3) that are close to each other; the clamping cavity (4) is adapted to the shape of the valve body, and the inner wall of the clamping cavity (4) abuts against the valve body.

2. A clamping tool for a diaphragm valve according to claim 1, characterized in that: A clamping groove (41) is provided on one side of the two clamping blocks (3) close to each other. When the two clamping blocks (3) clamp the valve body, the two clamping grooves (41) form a clamping cavity (4), and the side walls of the two clamping grooves (41) located on both sides of the groove opening abut against the valve body.

3. The clamping tool for a diaphragm valve according to claim 1, characterized in that: A protrusion (5) is formed at each of the two ends close to each other, and the protrusion (5) extends in a direction away from the base (1). When the two clamping blocks (3) clamp the valve body, the valve body is located between the two protrusions (5).

4. The clamping tool for a diaphragm valve according to claim 1, characterized in that: A first limiting block (6) is arranged on the top of the hydraulic drive block (2) along the moving direction of the hydraulic drive block (2); a first limiting groove (7) is provided on the side wall of the clamping block (3) for connecting with the hydraulic drive block (2); the first limiting block (6) extends into the first limiting groove (7) and is adapted in shape to the first limiting groove (7).

5. A clamping tool for a diaphragm valve according to claim 4, characterized in that: A second limiting groove (9) is provided on the top of the hydraulic drive block (2) perpendicular to the extension direction of the first limiting block (6); a second limiting block (8) is provided on the side wall of the clamping block (3) for connecting the hydraulic drive block (2); the second limiting block (8) extends into the second limiting groove (9) and is adapted in shape to the second limiting groove (9).

6. The clamping tool for a diaphragm valve according to claim 1, characterized in that: A first limiting wedge block (10) is arranged on the top of the hydraulic drive block (2) along the moving direction of the hydraulic drive block (2); a first limiting inclined groove (11) is provided on the side wall of the clamping block (3) for connecting the hydraulic drive block (2); the first limiting wedge block (10) abuts against the side wall of the first limiting inclined groove (11); a second limiting inclined groove (13) is provided on the top of the hydraulic drive block (2) perpendicular to the extension direction of the first limiting wedge block (10); the clamping block (3) is correspondingly provided with a second limiting wedge block (12); the second limiting wedge block (12) abuts against the side wall of the second limiting inclined groove (13); the spacing between the two side walls of the first limiting inclined groove (11) gradually increases from the bottom of the groove to the groove opening, and the spacing between the two side walls of the second limiting inclined groove (13) gradually increases from the bottom of the groove to the groove opening.

7. A clamping tool for a diaphragm valve according to claim 6, characterized in that: The first limiting wedge block (10) is provided with a first abutting inclined surface (14) on the side wall corresponding to the first limiting inclined groove (11), and the second limiting wedge block (12) is provided with a second abutting inclined surface (15) on the side wall corresponding to the second limiting inclined groove (13).

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