A direct-acting valve spool valve seat grinding positioning device

Abstract

The utility model discloses a direct valve core valve seat grinding positioning device, including the positioning core, two bolt countersunk hole are opened to the symmetry on the positioning core, the positioning core is installed on the valve core, the first screw hole is opened to the positioning core one side, the ball hole is opened to the other side of positioning core, the first screw hole with ball hole intercommunication, the ball point screw is installed in the first screw hole, the small ball is installed in the ball hole, the valve core lower end face opens a plurality of groups with second screw hole corresponding bolt countersunk hole, and the positioning core is installed on second screw hole through bolt. When using, the valve core valve seat can be ground efficiently, the repeated use of positioning core can be realized, and the valve core valve seat can be accurately positioned, the deflection is avoided, and the grinding efficiency and quality can be improved significantly when grinding.

Description

Technical Field

[0001] This utility model relates to the field of valve processing technology, and in particular to a grinding and positioning device for a direct-acting valve core and seat. Background Technology

[0002] Direct-acting valves in pipeline systems control parameters such as pressure, temperature, and flow rate of the medium, and have stringent requirements for sealing performance. As the core sealing components of direct-acting valves, the valve core and valve seat, the fitting accuracy of their sealing surfaces directly determines the valve's sealing effect. Despite the continuous development of modern processing technology, microscopic defects and dimensional deviations inevitably exist in the valve core and valve seat during processing, such as surface roughness not meeting standards or flatness not meeting requirements. These minor defects can adversely affect the valve's sealing performance and overall performance. Grinding processes can effectively remove such microscopic defects, improve the flatness and surface quality of the sealing surface, and ensure the fitting accuracy of the valve core and valve seat. Traditional positioning methods for valve core and seat grinding, such as manual grinding, require workers to repeatedly measure to ensure the valve core and seat are level. This is inefficient and requires a high level of worker skill. Some early grinding positioning devices also have shortcomings such as large size, high cost, and poor applicability. Furthermore, they cannot adjust the distance between the valve core and seat during grinding. Therefore, we propose a direct-acting valve core and seat grinding positioning device to solve the above problems. Utility Model Content

[0003] This utility model provides a grinding and positioning device for a direct-acting valve core and seat, which solves the problems of low efficiency, inability to adapt to valve cores and seats of different sizes, and inability to accurately position the valve core and seat of traditional valve positioning devices.

[0004] This utility model provides a grinding and positioning device for a direct-acting valve core and seat, including a positioning core. The positioning core has two symmetrically opened bolt countersunk holes. The positioning core is installed on the valve core. A first screw hole is opened on one side of the positioning core, and a ball bearing hole is opened on the other side of the positioning core. The first screw hole and the ball bearing hole are interconnected. A ball set screw is installed in the first screw hole, and a ball bearing is installed in the ball bearing hole. The lower end face of the valve core has multiple sets of second screw holes corresponding to the bolt countersunk holes. The positioning core is installed on the second screw holes by bolts.

[0005] Preferably, the ball set screw includes a set screw rod that matches the first screw hole. One side of the set screw rod has a circular groove corresponding to the ball, and the other side of the set screw rod is machined with a limiting head, which has a tightening hole.

[0006] Preferably, the valve core is mounted on a planar rotating mechanism via a clamping device.

[0007] Preferably, the first screw hole has a set screw hole on the upper side of the positioning core, and a screw set screw is installed in the set screw hole.

[0008] Preferably, the ball bearings are polyoxymethylene resin balls.

[0009] Preferably, the number of the second screw holes is at least a set.

[0010] Preferably, the edge of the positioning core located on one side of the ball is chamfered.

[0011] As can be seen from the above technical solution, this utility model provides a grinding and positioning device for direct-acting valve cores and seats. In use, at least four sets, totaling eight second screw holes, are machined on the lower end face of the valve core. By installing the positioning core, ball bearings, and ball screws onto the lower end face of the valve core, the gap between the valve core and the valve seat can be adjusted. Simultaneously, a screw hole is machined on the positioning core body and a screw screw is installed to prevent the ball screws from failing due to repeated stress. The positioning core is designed with ball bearing holes that match the ball bearings. The ball bearings can move back and forth within the holes through the rotation of the ball screws, thereby adjusting the gap between the valve core and the valve seat. During valve core and seat grinding, it is installed on a planar rotating mechanism. The rotation of the mechanism drives the valve core to rotate, and the operator only needs to hold the valve seat. This device can meet the grinding needs of valve cores and seats for direct-acting valves of different diameters (large, medium, and small). When grinding valve cores and seats of different specifications, adaptation can be completed simply by clamping the valve core and installing the adjustable positioning core body, which greatly shortens the time for changing and debugging grinding tools and improves the efficiency of manual grinding.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. By installing a positioning core on the valve core and cooperating with the ball bearing, the valve seat can be directly fitted onto the valve core for grinding. During grinding, the worker only needs to hold the valve seat and rotate the valve core to perform high-efficiency grinding, which can significantly improve grinding efficiency. 2. By disassembling and assembling the positioning core on different valve cores, new specifications of valve cores and valve seats can be quickly adapted without redesigning and manufacturing the device. Furthermore, by designing the positioning core to a suitable size, it can adapt to valve cores and valve seats of different diameters, lengths, or angles, significantly increasing the applicability of the equipment. 3. Through the cooperation of ball set screw, ball and positioning core, the valve core and valve seat can be accurately positioned. By adjusting the ball set screw, the distance between the ball and the valve seat can be adjusted, thereby adjusting the gap between the valve core and the valve seat, and keeping it horizontal during grinding to avoid skewing.

[0013] In summary, by using this application, the positioning core can be reused, and the valve core and seat can be accurately positioned to avoid skewing. During grinding, the grinding efficiency and quality can be significantly improved, thereby greatly reducing the production and maintenance costs of direct-acting valves. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a grinding and positioning device for a direct-acting valve core and seat proposed in this utility model. Figure 2 This is an installation diagram of a grinding and positioning device for a direct-acting valve core and seat proposed in this utility model; Figure 3 A schematic diagram A shows the structure of the positioning core of the grinding and positioning device for a direct-acting valve core and seat proposed in this utility model; Figure 4 This is a schematic diagram (B) of the positioning core of a grinding and positioning device for a direct-acting valve core and seat proposed in this utility model; Figure 5 This is a schematic diagram of the structure of the valve core of a direct-acting valve core and valve seat grinding and positioning device proposed in this utility model; Figure 6 This is a schematic diagram of the ball set screw structure of a grinding and positioning device for a direct-acting valve core and seat proposed in this utility model.

[0016] In the diagram: 1. Positioning core; 2. Bolt countersunk hole; 3. Valve core; 4. First screw hole; 5. Ball bearing hole; 6. Ball bearing set screw; 7. Ball bearing; 8. Second screw hole; 9. Bolt; 10. Set screw rod; 11. Circular groove; 12. Limiting head; 13. Tightening hole; 14. Clamping device; 15. Planar rotation mechanism; 16. Set screw hole; 17. Screw set screw; 18. Valve seat. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0018] See Figure 1-6A grinding and positioning device for a direct-acting valve core and seat is applied in the field of valve processing technology. It can efficiently grind the valve core 3 and valve seat 18, realize the reuse of the positioning core, and accurately position the valve core 3 and valve seat 18 to avoid skewness. It can significantly improve grinding efficiency and quality during grinding. Specifically, the positioning core 1 has two symmetrical countersunk bolt holes 2. To ensure the concealed installation of the bolts 9, the two countersunk bolt holes 2 ensure the stability of the positioning core 1 during installation. The positioning core 1 is installed on the valve core 3. A first screw hole 4 is opened on one side of the positioning core 1, and a ball bearing hole 5 is opened on the other side. The first screw hole 4 and the ball bearing hole 5 are interconnected. A ball set screw 6 is installed in the first screw hole 4, and a ball bearing 7 is installed in the ball bearing hole 5. The ball bearing hole 5 is an elongated hole, which ensures that the ball bearing 7 can move back and forth within the hole. To prevent the ball bearing 7 from falling out, after the ball bearing 7 is installed into the ball bearing hole 5, the four points outside the ball bearing hole 5 need to be riveted. In use, rotating the ball set screw 6 allows the ball bearing 7 to move back and forth within the hole through the rotation of the ball set screw 6, thereby adjusting the gap between the valve core 3 and the valve seat 18. Furthermore, during grinding, it ensures the horizontal stability of the valve core 3 and the valve seat 18.

[0019] The lower end face of the valve core 3 has multiple sets of second screw holes 8 corresponding to the countersunk holes 2 of the bolts. The positioning core 1 is installed on the second screw holes 8 by bolts 9. At least four sets, totaling eight second screw holes 8, are machined on the lower end face of the valve core 3. The number of sets can be increased as needed. By installing the positioning core 1, the ball 7 and the ball set screw 6 on the lower end face of the valve core 3, the gap between the valve core 3 and the valve seat 18 can be adjusted. When replacing the valve seat 18 and valve core 3 that need to be ground, it is only necessary to pre-drill the second screw holes 8 on the valve core 3. The grinding equipment can be quickly changed by replacing the positioning core 1, which can significantly improve production efficiency.

[0020] In this invention, the ball set screw 6 includes a set screw 10 that matches the first screw hole 4. One side of the set screw 10 has a circular groove 11 corresponding to the ball 7, and the other side of the set screw 10 is machined with a limiting head 12. The limiting head 12 has a tightening hole 13, which can be a hexagonal hole for easy tightening. In use, by inserting a tightening tool into the tightening hole 13, the set screw 10 is turned through the limiting head 12. The set screw 10 pushes the ball 7 toward the valve seat 18. The circular groove 11 ensures that the set screw 10 and the ball 7 fit tightly together, and the clamping of the set screw 10 will not interfere with the normal rotation of the ball 7.

[0021] In this utility model, the valve core 3 is mounted on the planar rotation mechanism 15 by the clamping device 14. The structure of the clamping device 14 and the planar rotation mechanism 15 is common knowledge among those skilled in the art, so it will not be described in detail here. In use, the valve core 3 is clamped by the clamping device 14, and the planar rotation mechanism 15 rotates the valve core 3. The worker holds the valve seat 18, and the valve core 3 and the valve seat 18 can be ground.

[0022] In this utility model, the first screw hole 4 has a set screw hole 16 on the upper side of the positioning core 1, and a screw set screw 17 is installed in the set screw hole 16. Machining the set screw hole 16 on the positioning core 1 and installing the screw set screw 17 can prevent the ball set screw 6 from failing due to repeated stress.

[0023] In this invention, the ball bearing 7 is a polyoxymethylene resin ball bearing. In this device, the polyoxymethylene resin ball bearing has the advantages of being lightweight and having low inertia, reducing the overall weight of the device while ensuring strength and functionality. Furthermore, during grinding, the valve seat needs to be repeatedly lifted to ensure the grinding paste effectively covers the grinding surface, and it is not prone to rusting. The polyoxymethylene resin ball bearing has excellent self-lubricating properties, eliminating the need for additional lubricating oil during operation. This avoids the need for regular oil replenishment and prevents lubricant leakage that could contaminate surrounding components. Additionally, because the hardness of the polyoxymethylene resin material is lower than that of the valve seat metal material, the positioning and guiding rotation will not damage the inner hole of the valve seat.

[0024] In this invention, the edge of the positioning core 1 located on one side of the ball 7 is chamfered to prevent the sharp edges of the positioning core 1 from damaging the valve seat 18.

[0025] As can be seen from the above technical solution, during use, at least four sets, totaling eight second screw holes 8, are machined on the lower end face of the valve core. By installing the positioning core 1, ball bearings 7, and ball set screws 6 onto the lower end face of the valve core 3, the gap between the valve core 3 and the valve seat 18 can be adjusted. Simultaneously, a set screw hole 16 is machined on the positioning core body and a screw set screw 17 is installed to prevent the ball set screw 6 from failing due to repeated stress. The positioning core 1 is designed with ball bearing holes 5 that match the ball bearings 7. The ball bearings 7 can move back and forth within the holes through the rotation of the ball set screw 6, thereby adjusting the gap between the valve core 3 and the valve seat 18. When grinding the valve core 3 and valve seat 18, they are installed on the planar rotating mechanism 15. The rotation of the mechanism drives the valve core 3 to rotate, and the operator only needs to hold the valve seat 18. This device can meet the grinding needs of valve cores and valve seats of large, medium, and small diameter direct-acting valves. When grinding valve cores and valve seats of different specifications, the adaptation can be completed simply by clamping the valve core and installing the adjustable positioning core body, which greatly shortens the time for changing and debugging grinding tools and improves the efficiency of manual grinding.

[0026] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of the invention is indicated by the claims.

[0027] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model.

Claims

1. A grinding and positioning device for a direct-acting valve core and seat, comprising a positioning core (1), characterized in that: The positioning core (1) has two symmetrical countersunk bolt holes (2). The positioning core (1) is installed on the valve core (3). The positioning core (1) has a first screw hole (4) on one side and a ball hole (5) on the other side. The first screw hole (4) and the ball hole (5) are interconnected. A ball set screw (6) is installed in the first screw hole (4), and a ball (7) is installed in the ball hole (5). The lower end face of the valve core (3) has multiple sets of second screw holes (8) corresponding to the countersunk holes (2) of the bolts, and the positioning core (1) is installed on the second screw holes (8) by bolts (9).

2. The grinding and positioning device for a direct-acting valve core and seat according to claim 1, characterized in that, The ball set screw (6) includes a set screw (10) that matches the first screw hole (4). The set screw (10) has a circular groove (11) on one side that corresponds to the ball (7). The set screw (10) has a limiting head (12) on the other side. The limiting head (12) has a tightening hole (13).

3. The grinding and positioning device for a direct-acting valve core and seat according to claim 1, characterized in that, The valve core (3) is mounted on the planar rotating mechanism (15) by a clamping device (14).

4. The grinding and positioning device for a direct-acting valve core and seat according to claim 1, characterized in that, The first screw hole (4) has a set screw hole (16) on the upper side of the positioning core (1), and a screw set screw (17) is installed in the set screw hole (16).

5. The grinding and positioning device for a direct-acting valve core and seat according to claim 1, characterized in that, The ball (7) is a polyoxymethylene resin ball.

6. The grinding and positioning device for a direct-acting valve core and seat according to claim 1, characterized in that, The number of the second screw hole (8) is at least 4 sets.

7. The grinding and positioning device for a direct-acting valve core and seat according to claim 4, characterized in that, The positioning core (1) has a chamfered edge on one side of the ball (7).

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