A processing device for a V-type ball valve core

Abstract

The present invention discloses a processing device for a V-shaped ball valve core, which is equipped with a V-shaped valve core. The V-shaped ball valve core includes a spherical body and two connecting bodies respectively located at both ends of the spherical body and parallel to each other, the two connecting bodies are respectively provided with a light hole and a polygonal hole, and positioning blocks are respectively provided on the end surfaces facing each other of the two connecting bodies, the two positioning blocks are respectively penetrated by the light hole and the polygonal hole, the two positioning blocks each include a circular portion with a circumferential surface as the outer wall and a convex block integrally formed with the circumferential surface of the circular portion, and the convex block is a rectangular block. The processing device for the V-shaped ball valve core includes a dividing chuck, an upper clamp and a lower clamp distributed up and down and used to jointly clamp the two positioning blocks, the upper clamp and the lower clamp are both rotatably connected to the inner cavity of the dividing chuck, thereby solving the problem that the light holes and the polygonal holes at both ends of the existing V-shaped ball valve core are not coaxial and the problem that the processing technology of the existing V-shaped ball valve core is complex and the processing error is large.

Description

Technical Field

[0001] The present invention relates to the technical field of V-type ball valves, and more particularly to a processing device for a V-type ball valve core. Background Art

[0002] The valve core of a V-shaped ball valve has a V-shaped notch, and flow regulation is achieved by adjusting the valve core through the valve stem. To improve regulation accuracy, the valve stem and valve core are connected. Therefore, there are valve core holes at both ends of the valve core. The valve core hole at one end of the valve core is generally a polygonal hole, such as a spline hole, a single key hole, a square hole, a hexagonal hole, an octagonal hole, etc. The valve core hole at the other end of the valve core is a smooth hole.

[0003] There are two existing cutting processes for machining V-shaped valve cores. First, one end face and hole must be machined first, and then the hole is used as a reference for positioning before clamping and machining the other end face and hole. Since the machining of the two end faces and holes of the valve core requires two steps: disassembling the valve core, turning it over, and clamping it, it is difficult to ensure the coaxiality between the two holes. The relative position and size of the valve core are unstable, and defective products are easily produced during machining, which affects the machining accuracy of the valve core hole and the sealing performance of the valve. Second, bosses are provided at both ends of the V-shaped valve core. One of the bosses is first clamped by a three-jaw chuck on a horizontal lathe. One end face and hole are turned, and one end of the valve core hole is clamped on the three-jaw chuck through disassembly and assembly, and then the other end face and hole are clamped and turned. This method is easy to cause the V-shaped valve core to tilt during the processing due to the large mass of the V-shaped valve core and the small height of the boss. At the same time, the position of the V-shaped valve core changes during the disassembly and assembly process, which will cause a large axial deviation between the two holes and make them unable to be coaxial. Furthermore, the two valve core holes and spherical surface processing of the valve core require multiple processes, and different fixtures are required for disassembly and assembly and separate processing. The process is complicated, the processing efficiency is low, and the various form and position tolerances are difficult to guarantee. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a V-type ball valve core with two coaxial valve core holes, and also to provide a processing device for a V-type ball valve core that can make the two valve core holes of the valve core coaxial, with simple process and high processing efficiency.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a V-type ball valve core, comprising a spherical body and two connecting bodies respectively located at both ends of the spherical body and parallel to each other, the two connecting bodies respectively having a light hole and a polygonal hole, positioning blocks are respectively provided on the facing end faces of the two connecting bodies, the two positioning blocks are respectively penetrated by the light hole and the polygonal hole, and the two positioning blocks each include a circular portion with an outer wall being a circumferential surface and a convex block integrally formed with the circumferential surface of the circular portion.

[0006] As a further improvement of the present invention, the protrusion is a rectangular block.

[0007] The present invention provides another technical solution: a processing device for a V-type ball valve core, comprising a dividing chuck, an upper clamp and a lower clamp distributed up and down and used to jointly clamp two positioning blocks, and the upper clamp and the lower clamp are both rotatably connected to the inner cavity of the dividing chuck.

[0008] As a further improvement of the present invention, the lower clamp includes a support body connected to the dividing chuck and two groups of supporting feet for lifting the two circular parts respectively. The number of supporting feet in the two groups of supporting feet is two and they are symmetrically arranged. The surfaces of the four supporting feet that fit with the circumferential wall of the circular part are all beveled surfaces. The beveled surfaces of the two supporting feet in each group jointly lift the circular part so that the center of the circular part is located on the symmetry axis of the two supporting feet.

[0009] As a further improvement of the present invention, the support body is further provided with two reinforcing surfaces which respectively connect the two oblique cut surfaces in the two groups of support legs together and are recessed into the support body.

[0010] As a further improvement of the present invention, the support body is provided with a material-saving groove with a groove bottom that is concave inward and has an arc surface.

[0011] As a further improvement of the present invention, the height of the bottom of the material-saving trough is lower than the height of the reinforcement surface.

[0012] As a further improvement of the present invention, the upper clamp includes a connected body and two clamping parts located on the end surface of the connected body facing the lower clamp, the two clamping parts are respectively arranged corresponding to the two positioning blocks, and the two clamping parts are both provided with grooves adapted to the protrusions.

[0013] As a further improvement of the present invention, the joint body is provided with a material-saving groove with a groove bottom that is concave inward and has an arc surface.

[0014] As a further improvement of the present invention, the distance from the bottom of the material-saving groove to the upper surface of the inner cavity of the indexing chuck is smaller than the distance from the bottom of the groove to the upper surface of the inner cavity of the indexing chuck.

[0015] The beneficial effects of the present invention are as follows: the V-shaped ball valve core includes a spherical body and two connecting bodies, and positioning blocks are provided on the facing end surfaces of the two connecting bodies, and the positioning blocks include a round part and a convex block. The processing device of the V-shaped ball valve core includes a graduated chuck, an upper clamp and a lower clamp that are distributed up and down and can clamp the two positioning blocks together. The valve core is driven by the lower clamp to rotate the required angle so that the light hole and the polygonal hole are processed in turn on the two connecting bodies, and the spherical body can also be fine-machined. Compared with the existing technology, such a design only requires one step of installing the valve core to successively process the light hole, the polygonal hole and the spherical body of the valve core, which simplifies the complex process, reduces the clamping time, and improves the processing efficiency of the valve core. The invention can improve the efficiency and coaxiality of the light hole and the polygonal hole, and make up for the defects of the prior art that the light hole and the polygonal hole are not coaxial and the prior art splits the valve core into different processing steps; compared with the design of the chuck clamping boss of the horizontal lathe, the connection stability of the clamped valve core can be improved, and the processing accuracy is indirectly improved; by arranging positioning blocks on the end faces facing each other of the connecting body so that the upper clamp and the lower clamp are both located between the two connecting bodies, the design can avoid the interference of the upper clamp and the lower clamp on the tool compared to the design of clamping the outer boss of the connecting body by the upper clamp and the lower clamp, thereby indirectly protecting the upper clamp, the lower clamp and the tool, and facilitating the tool to process the outer end face of the connecting body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an assembly diagram of the present invention;

[0017] Figure 2 A three-dimensional diagram of a V-shaped ball valve core processing device according to the present invention;

[0018] Figure 3 It is a three-dimensional diagram of the valve core of the V-shaped ball valve in the present invention.

[0019] Figure numerals: 1. spherical body; 2. connector; 3. light hole; 4. polygonal hole; 5. positioning block; 6. circular part; 7. protrusion; 8. dividing chuck; 9. upper clamp; 10. lower clamp; 11. supporting body; 12. supporting foot; 13. material-saving groove; 14. connected body; 15. pressing part; 16. groove; 17. material-saving groove; 18. reinforcement surface. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, wherein the same components are represented by the same reference numerals.

[0021] Reference Figures 1 to 3 As shown, a V-shaped ball valve core of this embodiment includes a spherical body 1 and two connecting bodies 2 respectively located at both ends of the spherical body 1 and parallel to each other. The two connecting bodies 2 are respectively provided with a light hole 3 and a polygonal hole 4;

[0022] Based on the above-mentioned prior art, positioning blocks 5 are integrally formed on the end faces of the two connectors 2 facing each other. The two positioning blocks 5 each include a circular portion 6 with a circumferential outer wall and a protrusion 7 integrally formed with the circumferential surface of the circular portion 6.

[0023] This embodiment also provides a processing device for processing a V-type ball valve core, including an indexing chuck 8, an upper clamp 9 and a lower clamp 10. The indexing chuck 8 adopts a hydraulic indexing chuck in the prior art. The indexing chuck 8 is composed of a chuck body, a pressing piston, an indexing plate, etc. The upper clamp 9 and the lower clamp 10 are both installed in the inner cavity of the indexing chuck 8. The upper clamp 9 is rotatably connected to the pressing piston, and the lower clamp 10 is fixedly connected to the indexing plate. The upper clamp 9 is located directly above the lower clamp 10.

[0024] In the initial state, the upper clamp 9 and the lower clamp 10 are away from each other. During the installation process, the valve core to be processed is placed on the lower clamp 10, and the two positioning blocks 5 are lifted by the lower clamp 10. The upper clamp 9 is then driven by the compression piston of the indexing chuck 8 to move toward the lower clamp 10 until the upper clamp 9 presses the two positioning blocks 5. The two positioning blocks 5 are clamped between the upper clamp 9 and the lower clamp 10. At the same time, the width of the upper clamp 9 and the lower clamp 10 is less than the distance between the two connectors 2. During the processing, the indexing plate drives the lower clamp 10 to rotate, and the upper clamp 9 is relatively compressed by the piston. Rotate, first rotate the indexing plate to the position so that the end face of one of the connectors 2 faces the tool, and use the tool to machine a light hole 3 on this end, which passes through the connector 2 and the circular portion 6 coaxial with the connector 2. Then rotate the indexing plate so that the end face of the other connector 2 faces the tool, and use the tool to machine a polygonal hole 4 on this end, which passes through the connector 2 and the circular portion 6 coaxial with the connector 2. Finally, rotate the indexing plate again so that the spherical body 1 faces the tool, and use the tool to fine-machine the spherical body 1. After the processing is completed, remove the processed valve core for preparation for the next processing;

[0025] Compared with the existing technology, this design only requires one step of installing the valve core to successively process the light hole 3, polygonal hole 4 and spherical body 1 of the valve core, which simplifies the complex process and improves the processing efficiency of the valve core. At the same time, it ensures the coaxiality of the light hole 3 and the polygonal hole 4 with high precision, which makes up for the defect of the light hole 3 and the polygonal hole 4 in the existing technology that the light hole 3 and the polygonal hole 4 are not coaxial; compared with the design of the chuck clamping boss of the horizontal lathe, it can also improve the connection stability of the clamped valve core, and indirectly improve the processing accuracy; by arranging positioning blocks 5 on the opposite end faces of the connector 2 so that the upper clamp 9 and the lower clamp 10 are both located between the two connectors 2, the design can avoid the interference of the upper clamp 9 and the lower clamp 10 with the tool compared to the design of using the upper clamp 9 and the lower clamp 10 to clamp the outer boss of the connector 2, indirectly protect the upper clamp 9, the lower clamp 10 and the tool, and also facilitate the tool to process the outer end face of the connector 2.

[0026] As a specific embodiment of the improvement, refer to Figure 2 As shown, the lower clamp 10 includes a support body 11 connected to the indexing chuck 8 and two groups of support feet 12 for holding up the two circular parts 6. The number of support feet 12 in the two groups of support feet 12 is two and they are symmetrically arranged. The end faces of the two support feet 12 facing each other in each group of support feet 12 are beveled and together form an inverted eight shape. During the installation process, the two circular parts 6 are respectively installed in the two groups of support feet 12. If there is a deviation, the circular part 6 will slide relative to the beveled surface of one of the support feet 12 until the circular part 6 touches the beveled surfaces of the two support feet 12, and the protrusion 7 does not interfere with the support feet 12. The beveled surfaces of the two support feet 12 in each group are together. The circular portion 6 is lifted at the same time so that the center of the circular portion 6 is located on the symmetry axis of the two supporting feet 12. This design uses the sliding of the circular portion 6 and the beveled surface to adjust the center position of the connector 2, which is convenient for tool alignment and ensures that the circular portion 6 cannot move horizontally relative to the lower clamp 10, thereby improving the stability of the valve core installation position and ensuring that the light hole 3 and the polygonal hole 4 on each processed valve core are in the same position on the connector 2, thereby improving product quality. It is further explained that the design of changing the length of the supporting feet 12 on the straight line where the two connectors 2 are located so that the two groups of supporting feet 12 are connected together to form a group of supporting feet 12 also falls within the protection scope of this embodiment.

[0027] As a specific embodiment of the improvement, refer to Figure 2 As shown, two reinforcing surfaces 18 are further provided on the support body 11, which respectively connect the two beveled surfaces in the two groups of support feet 12 together and are recessed into the support body 11. The beveled surfaces of the two support feet 12 in each group of support feet 12 are smoothly connected with the reinforcing surfaces 18. Such a design can reduce the degree of deformation of the two support feet 12 caused by pressure when the two support feet 12 jointly lift the circular part 6, thereby improving the bending resistance of the support feet 12 and indirectly extending the service life of the lower clamp 10.

[0028] As a specific embodiment of the improvement, refer to Figure 2 As shown, the support body 11 is provided with a material-saving groove 13 with an arc-shaped bottom that is concave inward. Such a design not only reduces the material and weight of the lower clamp 10, making it easier for the lower clamp 10 to be driven and rotated, but also provides better structural strength when the lower clamp 10 supports the valve core.

[0029] As a specific embodiment of the improvement, refer to Figure 2 As shown, the height of the bottom of the material-saving trough 13 is lower than the height of the reinforcement surface 18. This design can avoid the phenomenon that the valve core cannot be assembled with the lower clamp 10 when the distance between the two positioning blocks 5 is less than the distance between the two sets of support feet 12, thereby improving the versatility of the lower clamp 10.

[0030] As a specific embodiment of the improvement, refer to Figure 2 As shown, the upper clamp 9 includes a connecting body 14 and two clamping parts 15 located on the end surface of the connecting body 14 facing the lower clamp 10. The two clamping parts 15 are respectively arranged corresponding to the two positioning blocks 5. The two clamping parts 15 are both provided with grooves 16 adapted to the protrusions 7. During the installation process, the circular part 6 is installed in the lower clamp 10, and the protrusions 7 face the upper clamp 9 and correspond to the grooves 16. After the upper clamp 9 moves downward into place, the protrusions 7 are inserted into the grooves 16. This design can avoid the valve core from rotating under the gravity of the spherical body 1, improve the installation stability of the valve core, and facilitate the processing of the polygonal hole 4.

[0031] As a specific embodiment of the improvement, refer to Figure 2 As shown, the joint body 14 is provided with a material-saving groove 17 with an arc-shaped bottom that is concave inward. Such a design can not only reduce the material and weight of the upper clamp 9, and prevent the upper clamp 9 from falling out of the clamping piston due to excessive weight, but also provide better structural strength when the upper clamp 9 presses down the positioning block 5.

[0032] As a specific embodiment of the improvement, refer to Figure 2 As shown, the distance from the bottom of the material-saving groove 17 to the upper surface of the inner cavity of the dividing chuck 8 is smaller than the distance from the bottom of the groove 16 to the upper surface of the inner cavity of the dividing chuck 8. This design can avoid the phenomenon that the positioning blocks 5 cannot be assembled with the upper clamp 9 when the distance between the two positioning blocks 5 is smaller than the distance between the two sets of supporting feet 12, thereby improving the versatility of the upper clamp 9.

[0033] As a specific embodiment of the improvement, refer to Figures 1 to 3 As shown, the protrusion 7 is a rectangular block and one side of it is perpendicular to the symmetry axis of the positioning block 5. Compared with the design with complex shape of the protrusion 7, such design can reduce the structural complexity of the positioning block 5 and facilitate the processing of the positioning block 5; the groove 16 is a rectangular groove and its length is greater than the length of the protrusion 7. During the installation process, if the symmetry axis of the positioning block 5 is inclined relative to the vertical plane, the surface of the protrusion 7 facing the groove 16 has an angle relative to the bottom of the groove 16. After the groove 16 is sleeved on the outside of the protrusion 7 and as the upper clamp 9 continues to move downward, the bottom of the groove 16 presses the protrusion 7 downward, and the circular part 6 rotates relative to the supporting foot 12 until the bottom of the groove 16 is completely fitted with the upper surface of the protrusion 7, the upper clamp 9 stops moving, and the circular part 6 rotates into place. Such design makes the tooling position of the spherical body 1 accurate, so as to facilitate the subsequent fine processing of the spherical body 1 by the tool, and improve the qualified rate of the valve core.

[0034] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A processing device for a V-type ball valve core, which is equipped with a V-type valve core, the V-type valve core includes a spherical body (1) and two connecting bodies (2) respectively located at both ends of the spherical body (1) and parallel to each other, the two connecting bodies (2) are respectively provided with a light hole (3) and a polygonal hole (4), and positioning blocks (5) are respectively provided on the end faces facing each other of the two connecting bodies (2), the two positioning blocks (5) are respectively penetrated by the light hole (3) and the polygonal hole (4), and the two positioning blocks (5) each include a circular portion (6) with an outer wall being a circumferential surface and a convex block (7) integrally formed with the circumferential surface of the circular portion (6), the convex block (7) being a rectangular block, characterized in that: The utility model comprises a dividing chuck (8), an upper clamp (9) and a lower clamp (10) which are distributed in an upper and lower manner and are used to clamp two positioning blocks (5) together, wherein the upper clamp (9) and the lower clamp (10) are both rotatably connected to the inner cavity of the dividing chuck (8), and the dividing chuck (8) comprises a chuck body, a pressing piston and a dividing plate, the upper clamp (9) is rotatably connected to the pressing piston, and the lower clamp (10) is fixedly connected to the dividing plate.

2. The processing device for a V-shaped ball valve core according to claim 1, characterized in that: The lower clamp (10) includes a support body (11) connected to the indexing chuck (8) and two groups of support feet (12) for supporting the two circular parts (6). The number of support feet (12) in the two groups of support feet (12) is two and they are symmetrically arranged. The surfaces of the four support feet (12) that fit the peripheral wall of the circular part (6) are all beveled surfaces. The beveled surfaces of the two support feet (12) in each group jointly support the circular part (6) so that the center of the circular part (6) is located on the symmetry axis of the two support feet (12).

3. The processing device for a V-shaped ball valve core according to claim 2, characterized in that: The support body (11) is further provided with two reinforcing surfaces (18) which respectively connect the two beveled surfaces in the two groups of support legs (12) together and are recessed into the support body (11).

4. The processing device for a V-shaped ball valve core according to claim 3, characterized in that: The support body (11) is provided with a material-saving groove (13) whose bottom is concave inward and has an arc surface.

5. The processing device for a V-shaped ball valve core according to claim 4, characterized in that: The height of the bottom of the material-saving trough (13) is lower than the height of the reinforcement surface (18).

6. The processing device for a V-shaped ball valve core according to claim 1, 2, 3, 4 or 5, characterized in that: The upper clamp (9) includes a connecting body (14) and two pressing parts (15) located on the end surface of the connecting body (14) facing the lower clamp (10), the two pressing parts (15) are respectively arranged corresponding to the two positioning blocks (5), and the two pressing parts (15) are both provided with a groove (16) adapted to the protrusion (7).

7. The processing device for a V-shaped ball valve core according to claim 6, characterized in that: The joint body (14) is provided with a material-saving groove (17) whose bottom is concave inward and has an arc surface.

8. The processing device for a V-shaped ball valve core according to claim 7, characterized in that: The distance from the bottom of the material-saving groove (17) to the upper surface of the inner cavity of the indexing chuck (8) is smaller than the distance from the bottom of the groove (16) to the upper surface of the inner cavity of the indexing chuck (8).

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