A valve seat and valve ball grinding tool

Abstract

A kind of valve seat and valve ball's grinding tool relates to grinding tool technical field, including square plate, driving plate is equipped above square plate, square plate top is fixed with stud in the position of four corners, two square key grooves are penetrated in the top of driving plate, stud top end passes through square key groove and is threadedly connected with limiting bolt, compression spring is sleeved on stud, and the both ends of compression spring correspond with square plate and driving plate, two clamping columns are fixed on the top of driving plate, clamping assembly for clamping valve seat is arranged on the bottom of square plate.The present application solves the problem of poor eccentric grinding range adjustability of existing grinding tool.

Description

Technical Field

[0001] This invention relates to the field of grinding tool technology, specifically to a grinding tool for valve seats and valve balls. Background Technology

[0002] In the maintenance of chemical equipment, ball valves, as critical pipeline control devices, directly determine the overall operational efficiency and sealing reliability of the valve after it is put into service due to the quality of repair of its core component, the valve ball. The valve ball and seat require extremely high precision in their fit; any minute deviation in shape or position or surface defect can lead to media leakage or valve jamming. Therefore, grinding tools are used during maintenance to ensure that the valve ball and seat are mutually lapped during relative rotation, thereby eliminating minor scratches and unevenness on the surface and ensuring a tight and uniform contact surface, thus restoring the ball valve's tight shut-off function.

[0003] Existing grinding tools have gradually revealed their shortcomings during use, mainly in the following aspects: The eccentric grinding range has poor adjustability. Specifically, in the actual implementation of grinding operations, the valve ball is usually fixed to the drilling machine, the grinding tool is clamped in the drill chuck of the drilling machine, and the valve seat is clamped on the grinding tool. The drilling machine spindle drives the valve seat to move vertically, so that the valve seat and the valve ball surface are tightly fitted, and the valve seat is positioned at the eccentric position of the valve ball to achieve the grinding trajectory. However, the eccentric angle of the valve seat clamped by the existing grinding tool is not adjustable, and it is impossible to adjust the eccentric grinding range according to different ball valve specifications. This not only results in a fixed grinding range of the valve seat on the valve ball, but also makes the equipment only suitable for maintenance operations on fixed models of ball valves, thus greatly limiting the versatility and applicability of the equipment.

[0004] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a grinding tool for valve seat and valve ball. This grinding tool can adjust the eccentric grinding range of the valve seat according to the actual working conditions, which significantly improves the versatility and applicability of the equipment.

[0006] To address the above problems, the present invention provides the following technical solution: A grinding tool for valve seats and valve balls includes a square plate, a drive plate on top of the square plate, studs fixed at the four corners of the top of the square plate, two square keyways extending through the top of the drive plate, the top of each stud passing through the square keyways and threaded with a limit bolt, a compression spring sleeved on the stud, the two ends of the compression spring abutting against the square plate and the drive plate respectively, two clamping posts fixed on the top of the drive plate, and a clamping assembly for clamping the valve seat at the bottom of the square plate.

[0007] As an optimized solution, the clamping assembly includes a rotatably configured clamping plate with a cross-shaped structure. The bottom of the clamping plate is provided with a plurality of movably configured clamping posts, and the outer wall of the clamping posts is provided with clamping grooves.

[0008] As an optimized solution, the top of the clamping plate is provided with several through guide grooves, and the top of the clamping column is fixedly provided with an insertion rod, which passes through the guide grooves.

[0009] As an optimized solution, the outer wall of the insertion rod is provided with a threaded section, and a stop bolt is threadedly connected to the threaded section.

[0010] As an optimized solution, the bottom of the square plate is provided with a rotating shaft, which is fixedly connected to the clamping plate.

[0011] Compared with the prior art, the beneficial effects of the present invention are: Secure the valve ball to the drilling machine worktable using clamping plates or other fixing devices. Place the clamping plate on top of the valve seat, move the clamping column until the clamping groove abuts against the side wall of the valve seat, and tighten the stop bolt to limit the clamping column. At this point, the valve seat is clamped at the bottom of the clamping plate. Use lifting tools to lift the clamping plate until the valve seat is moved to the top of the valve ball and in contact with the valve ball. Adjust the valve seat to the required off-grind angle. The operator presses down the drive plate to adjust it to a horizontal position and performs horizontal adjustment until the clamping column is below the drill chuck. The drilling machine spindle drives the drill chuck to move downwards, and the drill chuck clamps the valve ball. The drill chuck continues to move downwards, compressing the spring. Then, the limit bolt is tightened until it contacts the drive plate for positioning. The lifting tool is removed, and the drill chuck drives the valve seat to rotate and grind the valve ball. The compression spring provides the downward pressure required for grinding. When the eccentric grinding angle of the valve seat is small, the drill chuck grips the column in the middle of the drive plate; when the eccentric grinding angle is large, the drill chuck grips the column at the edge of the drive plate. This grinding tool can adjust the eccentric grinding range of the valve seat according to actual working conditions, significantly improving the equipment's versatility and applicability. Attached Figure Description

[0012] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the top structure of the square plate of the present invention; Figure 3 This is a schematic diagram of the structure of the driver board of the present invention; Figure 4 This is a schematic diagram of the structure of the clamping column of the present invention; Figure 5 This is a schematic diagram of the structure of the clamping plate of the present invention; Figure 6 This is a schematic diagram of the grinding process between the valve ball and the valve seat in this invention.

[0014] In the diagram: 1-Square plate; 2-Compression spring; 3-Stud; 4-Drive plate; 5-Limit bolt; 6-Square keyway; 7-Clamping column; 8-Rotating shaft; 9-Clamping assembly; 10-Clamping plate; 11-Guide groove; 12-Clamping column; 13-Clamping groove; 14-Insertion rod; 15-Stop bolt; 16-Threaded section; 17-Worktable; 18-Valve ball; 19-Valve seat; 20-Drill chuck; 21-Pressure plate. Detailed Implementation

[0015] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0016] like Figures 1 to 6 As shown, a grinding tool for valve seat and valve ball includes a square plate 1, a drive plate 4 on the top of the square plate 1, studs 3 fixedly installed at the four corners of the top of the square plate 1, two square keyways 6 passing through the top of the drive plate 4, the top of the studs 3 passing upward through the square keyways 6 and threadedly connected to limit bolts 5, a compression spring 2 sleeved on the studs 3, the two ends of the compression spring 2 abutting against the square plate 1 and the drive plate 4 respectively, two clamping posts 7 fixedly installed on the top of the drive plate 4, and a clamping assembly 9 for clamping the valve seat 19 at the bottom of the square plate 1.

[0017] The clamping assembly 9 includes a rotatably configured clamping plate 10, which has a cross-shaped structure. The bottom of the clamping plate 10 is provided with several movable clamping posts 12, and the outer wall of the clamping posts 12 is provided with clamping grooves 13.

[0018] The top of the clamping plate 10 is provided with several through guide grooves 11, and the top of the clamping column 12 is fixedly provided with an insertion rod 14, which passes through the guide grooves 11.

[0019] The outer wall of the insertion rod 14 is provided with a threaded section 16, and a stop bolt 15 is threadedly connected to the threaded section 16.

[0020] The bottom of the square plate 1 is provided with a rotating shaft 8, which is fixedly connected to the clamping plate 10.

[0021] The working principle of this device is as follows: Use clamping plates 21 and other fixing devices to fix the valve ball 18 on the drill table 17. Place the clamping plate 10 on top of the valve seat 19. Move the clamping column 12 so that the clamping groove 13 abuts against the side wall of the valve seat 19. Tighten the stop bolt 15 to limit the clamping column 12. At this time, the valve seat 19 is clamped at the bottom of the clamping plate 10. Use lifting tools to lift the clamping plate 10 until the valve seat 19 is moved to the top of the valve ball 18 and in contact with the valve ball 18. Adjust the valve seat 19 to the required off-grind angle. The operator presses down the drive plate 4 to adjust it to a horizontal state and makes horizontal movement adjustment until the clamping column 7 is below the drill chuck 20. The drill spindle drives the drill chuck 20 to move downward. The drill chuck 20 clamps the clamping column 7 and continues to move downwards, compressing the compression spring 2. Then, the limit bolt 5 is tightened to contact the drive plate 4 for limiting. The hoisting tool is removed, and the drill chuck 20 drives the valve seat 19 to rotate and grind the valve ball 18. The compression spring 2 provides the downward pressure required for grinding. When the eccentric grinding angle of the valve seat 19 is small, the drill chuck 20 clamps the clamping column 7 at the middle position of the drive plate 4. When the eccentric grinding angle of the valve seat 19 is large, the drill chuck 20 clamps the clamping column 7 at the edge position of the drive plate 4. This grinding tool can adjust the eccentric grinding range of the valve seat according to the actual working conditions, which significantly improves the versatility and applicability of the equipment.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A grinding tool for valve seats and valve balls, characterized in that: The device includes a square plate (1), a drive plate (4) on top of the square plate (1), studs (3) fixed at the four corners of the top of the square plate (1), two square keyways (6) through the top of the drive plate (4), the top of the studs (3) passing through the square keyways (6) and threadedly connected to limit bolts (5), a compression spring (2) sleeved on the studs (3), the two ends of the compression spring (2) abutting against the square plate (1) and the drive plate (4) respectively, two clamping posts (7) fixed at the top of the drive plate (4), and a clamping assembly (9) for clamping the valve seat (19) at the bottom of the square plate (1).

2. The grinding tool for valve seat and valve ball according to claim 1, characterized in that: The clamping assembly (9) includes a rotatably configured clamping plate (10), which has a cross-shaped structure. The bottom of the clamping plate (10) is provided with several movable clamping posts (12), and the outer wall of the clamping posts (12) is provided with clamping grooves (13).

3. The grinding tool for valve seat and valve ball according to claim 2, characterized in that: The clamping plate (10) has several through guide grooves (11) at its top, and the clamping column (12) has a fixed insert rod (14) at its top, which passes through the guide grooves (11).

4. The grinding tool for valve seat and valve ball according to claim 3, characterized in that: The outer wall of the insert (14) is provided with a threaded section (16), and a stop bolt (15) is threadedly connected to the threaded section (16).

5. The grinding tool for valve seat and valve ball according to claim 2, characterized in that: The square plate (1) has a rotating shaft (8) at its bottom, and the rotating shaft (8) is fixedly connected to the clamping plate (10).

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