Three-dimensional matching and grinding device for metal-sealed ball valve

Abstract

The utility model discloses a three -dimensional equipment of matching and grinding for metal seal ball valve, it includes base rotating mechanism, rotating rod, valve stem axis rotating mechanism, valve seat mounting seat and swing mechanism, and rotating rod horizontal extension setting and install the valve ball who has on rotating rod, valve stem axis rotating mechanism is connected in one end of rotating rod, valve stem axis rotating mechanism is connected on base rotating mechanism, the bottom installation of valve seat mounting seat is connected with valve seat, and valve seat is attached to the abutment on valve ball, and the top of valve seat mounting seat is swing mechanism's bottom swing connection, and the rotation axis of swing mechanism is same with the central axis of base rotating mechanism, and there is certain angle between the axial direction of valve seat mounting seat and the rotation axis of swing mechanism. Realize the even contact and optimal sealing of the sealing pair that processing can realize full circumference, full stroke under real working condition, avoid the early failure caused by the incompatibility of " static " and " dynamic " state.

Description

Technical Field

[0001] This utility model relates to a three-dimensional grinding device for metal-sealed ball valves. Background Technology

[0002] Metal-sealed ball valves are widely used in industries such as petroleum, chemical, and nuclear power due to their advantages such as high temperature and pressure resistance, corrosion resistance, and suitability for harsh working conditions. The core performance indicator of a metal-sealed ball valve lies in the reliability of its seal. Traditional metal hard-seal ball valves have both the ball and seat made of metal, relying on pre-tightening force to achieve surface contact sealing when closed.

[0003] However, the existing technology has the following main drawbacks:

[0004] Wear and leakage: Under frequent opening and closing or media scouring, metal sealing pairs are prone to wear, which leads to a decrease in sealing specific pressure and internal leakage.

[0005] The machining and assembly precision requirements are extremely high: if there is a deviation of micrometers in the roundness of the ball, the surface roughness, and the mating angle of the valve seat, it will seriously affect the sealing effect.

[0006] However, traditional two-dimensional machining and mating grinding (pair grinding) cannot guarantee a perfect fit between the ball and the valve seat in three-dimensional space.

[0007] Therefore, there is an urgent need for a new design and methodology that can simulate and optimize motion trajectories and contact surfaces during the design phase, achieve high-precision three-dimensional fit during the manufacturing phase, and provide better wear compensation capabilities during use. Utility Model Content

[0008] The purpose of this invention is to overcome the above-mentioned shortcomings of existing technology. This invention provides a three-dimensional grinding device for metal-sealed ball valves.

[0009] This utility model is achieved through the following technical solution:

[0010] A three-dimensional grinding device for a metal-sealed ball valve includes a base rotating mechanism, a rotating rod, a valve stem axis rotating mechanism, a valve seat mounting base, and a swing mechanism. The rotating rod extends horizontally and a valve ball is mounted on it. The valve stem axis rotating mechanism is connected to one end of the rotating rod and drives its rotation, thereby causing the valve ball to rotate around the axis of the rotating rod. The valve stem axis rotating mechanism is connected to the base rotating mechanism, and the base rotating mechanism drives the valve stem axis rotating mechanism to rotate around its central axis. The center of the ball is located on the central axis of the base rotation mechanism. A valve seat is installed and connected to the bottom of the valve seat mounting base. The valve seat fits against the valve ball. The bottom of the swing mechanism is movably connected to the top of the valve seat mounting base. The rotation axis of the swing mechanism is the same as the central axis of the base rotation mechanism. There is a certain angle between the axial direction of the valve seat mounting base and the rotation axis of the swing mechanism, so that the swing mechanism is used to drive the valve seat mounting base and the valve seat to rotate and swing, so as to realize that the valve seat rotates and swings on the valve ball around the rotation axis of the swing mechanism.

[0011] Furthermore, the swing mechanism includes a first rotary motor, a transverse rod, and a universal joint. The rotation axis of the first rotary motor is the same as the central axis of the base rotation mechanism, and the output shaft of the first rotary motor is connected to the transverse rod and used to drive the rotation of the transverse rod. The universal joint is inclined, and the top end of the universal joint is connected to the end of the transverse rod, and the bottom end of the universal joint is universally connected to the top of the valve seat mounting base.

[0012] Furthermore, the base rotation mechanism includes a second rotary motor and a base platform. The valve stem axis rotation mechanism is mounted on the top surface of the base platform. The rotating rod, the valve seat mounting base, and the swing mechanism are located directly above the base platform. The rotation axis of the second rotary motor is the same as that of the first rotary motor, and the output shaft of the second rotary motor is connected to the base platform and used to drive the base platform to rotate.

[0013] Furthermore, the first rotary motor is used to drive the valve seat mounting base to rotate clockwise, and the second rotary motor is used to drive the base platform to rotate counterclockwise.

[0014] Furthermore, the valve stem axis rotation mechanism includes a third rotary motor and at least one support base. The bottom of the third rotary motor and the support base are both connected to the base platform, and the output shaft of the third rotary motor is connected to the end of the rotating rod and is used to drive the rotation of the rotating rod. The rotating rod is rotatably mounted on the support base.

[0015] Furthermore, the support base has a through hole, through which the rotating rod is rotatably inserted.

[0016] Furthermore, a bearing is provided between the support base and the rotating rod.

[0017] Furthermore, there are two support seats, which are located on both sides of the valve ball, and the rotating rod is rotatably inserted through the two support seats and the valve ball.

[0018] Furthermore, the three-dimensional grinding equipment for metal-sealed ball valves also includes a control device, which is electrically connected to the base rotation mechanism, the valve stem axis rotation mechanism, and the swing mechanism, and is used to control the switching of the base rotation mechanism, the valve stem axis rotation mechanism, and the swing mechanism, as well as their output power.

[0019] Furthermore, the control device is a PLC.

[0020] The beneficial effects of this utility model are as follows:

[0021] This invention relates to a three-dimensional grinding device for metal-sealed ball valves. A valve stem axis rotation mechanism rotates the valve ball around the axis of the rotating stem, simulating the normal 90° opening and closing action of the ball valve. A swing mechanism drives the valve seat to rotate and swing on the valve ball, simulating the minute tilt changes of the valve ball under the action of media force or after wear. A base rotation mechanism rotates the valve ball around the central axis of the base rotation mechanism, simulating the relative misalignment between the valve ball and the valve seat in the circumferential direction, thus optimizing the contact stress distribution throughout the circumference. By controlling these three rotational movements, the valve ball and valve seat can be precisely controlled to achieve three independent rotational movements, generating a complex three-dimensional composite motion trajectory, enabling the valve seat to grind the sealing surface of the valve ball during this process. Because the motion state during processing is highly consistent with the actual working state of the valve, the processed sealing pair can achieve uniform contact and optimal sealing throughout the entire circumference and stroke under real working conditions, avoiding early failure caused by the mismatch between the "static" and "dynamic" states. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a three-dimensional grinding device for a metal-sealed ball valve according to an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] Base Rotation Mechanism 1

[0025] Base 11

[0026] Second rotary motor 12

[0027] Valve stem axis rotation mechanism 2

[0028] Third Rotary Motor 21

[0029] Support 22

[0030] Rotating rod 3

[0031] Swinging mechanism 4

[0032] First rotary motor 41

[0033] Horizontal bar 42

[0034] 43-inch universal rod

[0035] Valve seat mounting base 5

[0036] Valve ball 10

[0037] Valve seat 20 Detailed Implementation

[0038] The following description of the embodiments is with reference to the accompanying drawings, which illustrate specific embodiments in which the present invention can be implemented.

[0039] like Figure 1 As shown, this embodiment discloses a three-dimensional grinding device for metal-sealed ball valves. This device includes a base rotation mechanism 1, a valve stem axis rotation mechanism 2, a rotating rod 3, a swing mechanism 4, and a valve seat mounting base 5. The rotating rod 3 extends horizontally and a valve ball 10 is mounted on it. The valve stem axis rotation mechanism 2 is connected to one end of the rotating rod 3 and drives the rotation of the rotating rod 3, thereby causing the valve ball 10 to rotate around the axis of the rotating rod 3. The valve stem axis rotation mechanism 2 is connected to the base rotation mechanism 1, and the base rotation mechanism 1 drives the valve stem axis rotation mechanism 2 to rotate around the base. The central axis of mechanism 1 rotates, and the center of the valve ball 10 is located on the central axis of the base rotation mechanism 1. The bottom of the valve seat mounting base 5 is connected to the valve seat 20, which fits against the valve ball 10. The bottom of the swing mechanism 4 is movably connected to the top of the valve seat mounting base 5. The rotation axis of the swing mechanism 4 is the same as the central axis of the base rotation mechanism 1, and there is a certain angle between the axial direction of the valve seat mounting base 5 and the rotation axis of the swing mechanism 4, so that the swing mechanism 4 is used to drive the valve seat mounting base 5 and the valve seat 20 to rotate and swing, so as to realize that the valve seat 20 rotates and swings on the valve ball 10 around the rotation axis of the swing mechanism 4.

[0040] The valve ball 10 is mounted on the horizontally extending rotating rod 3, and the valve seat 20 is mounted on the bottom of the valve seat mounting base 5 and abuts against the valve ball 10. The valve stem axis rotation mechanism 2 provides rotational driving force and drives the rotating rod 3 to rotate, thereby causing the valve ball 10 to rotate. The valve ball 10 rotates around the axis of the rotating rod 3 through the valve stem axis rotation mechanism 2, thus simulating the normal 90° opening and closing action of the ball valve. The swing mechanism 4 provides driving force and rotates the valve seat mounting base 5 around the rotation axis of the swing mechanism 4, so that the valve seat 20 on the valve ball 10 also rotates and swings around the rotation axis of the swing mechanism 4, thereby simulating the slight tilt angle change of the valve ball 10 under the action of medium force or after wear. The base rotation mechanism 1 provides driving force and drives the valve stem axis rotation mechanism 2 to rotate around the central axis of the base rotation mechanism 1. This causes the valve ball 10 to rotate around the central axis of the base rotation mechanism 1 as well. The central axis of the base rotation mechanism 1 is the same as the rotation axis of the swing mechanism 4, and the center of the valve ball 10 is located on the central axis of the base rotation mechanism 1. This simulates the relative misalignment of the valve ball 10 and the valve seat 20 in the circumferential direction, thereby optimizing the contact stress distribution on the entire circumference. By controlling the above three rotational movements, the valve ball 10 and the valve seat 20 can be precisely controlled to achieve three independent rotational movements, thus generating a complex three-dimensional composite motion trajectory. During this process, the valve seat 20 performs mating grinding on the sealing surface of the valve ball 10. This allows for the simulation and optimization of motion trajectories and contact surfaces during the design stage, the achievement of high-precision three-dimensional fit during the manufacturing stage, and superior wear compensation capabilities during use. This enables the design and processing scheme of optimal three-dimensional fit of the ball valve sealing pair. Because the motion state during processing is highly consistent with the actual working state of the valve, the processed sealing pair can achieve uniform contact and optimal sealing throughout the entire circumference and stroke under real working conditions, avoiding early failure caused by the mismatch between the "static" and "dynamic" states.

[0041] In this embodiment, the swing mechanism 4 includes a first rotary motor 41, a transverse rod 42, and a universal joint 43. The rotation axis of the first rotary motor 41 is the same as the central axis of the base rotation mechanism 1, and the output shaft of the first rotary motor 41 is connected to the transverse rod 42 and used to drive the rotation of the transverse rod 42. The universal joint 43 is inclined, and its top end is connected to the end of the transverse rod 42, while its bottom end is universally connected to the top of the valve seat mounting base 5. The first rotary motor 41 provides driving force and drives the transverse rod 42 to rotate. Through the universal connection between the bottom of the universal joint 43 and the valve seat mounting base 5, the valve seat 20 is driven to rotate and swing around the rotation axis of the swing mechanism 4 on the valve ball 10. The overall structure is simple and easy to install.

[0042] The three-dimensional grinding equipment for metal-sealed ball valves also includes an adjustment frame. The first rotary motor 41 is mounted on the adjustment frame. The adjustment frame is used to adjust the position of the swing mechanism 4, the valve seat mounting seat 5 and the valve seat 20 to ensure that the valve seat 20 fits against the valve ball 10.

[0043] The base rotation mechanism 1 includes a second rotary motor 12 and a base platform 11. The valve stem axis rotation mechanism 2 is mounted on the top surface of the base platform 11. The rotating rod 3, valve seat mounting base 5, and swing mechanism 4 are located directly above the base platform 11. The rotation axis of the second rotary motor 12 is the same as that of the first rotary motor 41, and the output shaft of the second rotary motor 12 is connected to the base platform 11 and used to drive the base platform 11 to rotate. The second rotary motor 12 provides driving force and drives the base platform 11 to rotate. By mounting the valve stem axis rotation mechanism 2 on the base platform 11, the rotating rod 3, valve seat mounting base 5, swing mechanism 4, and valve ball 10 are precisely positioned directly above the base platform 11, making installation very convenient. Furthermore, the overall structure is simple and easy to use.

[0044] In this embodiment, the first rotary motor 41 drives the valve seat mounting base 5 to rotate clockwise, and the second rotary motor 12 drives the base platform 11 to rotate counterclockwise. This simulates the minute tilt changes of the valve ball 10 under the action of media force or after wear, as well as the relative misalignment between the valve ball 10 and the valve seat 20 in the circumferential direction, in order to optimize the contact stress distribution on the entire circumference.

[0045] The valve stem axis rotation mechanism 2 includes a third rotary motor 21 and at least one support base 22. The bottoms of both the third rotary motor 21 and the support base 22 are connected to the base platform 11. The output shaft of the third rotary motor 21 is connected to the end of the rotating rod 3 and is used to drive the rotation of the rotating rod 3. The rotating rod 3 is rotatably mounted on the support base 22. The third rotary motor 21 provides driving force and drives the rotation of the rotating rod 3 to cause the valve ball 10 to rotate and simulate the normal 90° opening and closing action of the valve ball 10. Simultaneously, the support base 22 provides support, ensuring the stable rotation of the rotating rod 3.

[0046] Specifically, the support base 22 has a through hole through which the rotating rod 3 rotatably passes. The through hole facilitates the installation of the rotating rod 3 on the support base 22 and allows it to rotate on the support base 22. A bearing is provided between the support base 22 and the rotating rod 3 to achieve higher rotational stability for both the rotating rod 3 and the valve ball 10.

[0047] In this embodiment, there are two support seats 22, which are located on both sides of the valve ball 10. The rotating rod 3 is rotatably inserted through the two support seats 22 and the valve ball 10. This allows the two ends of the rotating rod 3 to be supported on the two support seats 22, thereby achieving higher rotational stability of the rotating rod 3 and the valve ball 10.

[0048] The three-dimensional grinding equipment for metal-sealed ball valves also includes a control device. This control device is electrically connected to the base rotation mechanism 1, the valve stem axis rotation mechanism 2, and the swing mechanism 4, and is used to control the switching and output power of these three mechanisms, respectively. By controlling these three rotational movements, a complex three-dimensional composite motion trajectory can be generated, allowing for precise control of the ball to achieve three independent rotational movements, thus facilitating operation and control. The control device is a PLC.

[0049] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A three-dimensional grinding apparatus for metal-sealed ball valves, characterized in that, It includes a base rotation mechanism, a rotating rod, a valve stem axis rotation mechanism, a valve seat mounting base, and a swing mechanism. The rotating rod extends horizontally and a valve ball is mounted on it. The valve stem axis rotation mechanism is connected to one end of the rotating rod and drives the rotation of the rotating rod, thereby causing the valve ball to rotate around the axis of the rotating rod. The valve stem axis rotation mechanism is connected to the base rotation mechanism and drives the valve stem axis rotation mechanism to rotate around the central axis of the base rotation mechanism. The center of the valve ball is located on the central axis of the base rotation mechanism. A valve seat is mounted on the bottom of the valve seat mounting base and abuts against the valve ball. The bottom of the swing mechanism is movably connected to the top of the valve seat mounting base. The rotation axis of the swing mechanism is the same as the central axis of the base rotation mechanism, and there is a certain angle between the axial direction of the valve seat mounting base and the rotation axis of the swing mechanism, so that the swing mechanism drives the valve seat mounting base and the valve seat to rotate and swing, thereby realizing that the valve seat rotates and swings around the valve ball around the rotation axis of the swing mechanism.

2. The three-dimensional grinding equipment for metal-sealed ball valves as described in claim 1, characterized in that, The swing mechanism includes a first rotary motor, a horizontal rod, and a universal joint. The rotation axis of the first rotary motor is the same as the central axis of the base rotation mechanism, and the output shaft of the first rotary motor is connected to the horizontal rod and used to drive the rotation of the horizontal rod. The universal joint is inclined, and the top end of the universal joint is connected to the end of the horizontal rod, and the bottom end of the universal joint is universally connected to the top of the valve seat mounting base.

3. The three-dimensional grinding equipment for metal-sealed ball valves as described in claim 2, characterized in that, The base rotation mechanism includes a second rotary motor and a base platform. The valve stem axis rotation mechanism is mounted on the top surface of the base platform. The rotating rod, the valve seat mounting base, and the swing mechanism are located directly above the base platform. The rotation axis of the second rotary motor is the same as that of the first rotary motor, and the output shaft of the second rotary motor is connected to the base platform and used to drive the base platform to rotate.

4. The three-dimensional grinding equipment for metal-sealed ball valves as described in claim 3, characterized in that, The first rotary motor is used to drive the valve seat mounting base to rotate clockwise, and the second rotary motor is used to drive the base platform to rotate counterclockwise.

5. The three-dimensional grinding equipment for metal-sealed ball valves as described in claim 3, characterized in that, The valve stem axis rotation mechanism includes a third rotary motor and at least one support base. The bottom of the third rotary motor and the support base are both connected to the base platform. The output shaft of the third rotary motor is connected to the end of the rotating rod and is used to drive the rotation of the rotating rod. The rotating rod is rotatably mounted on the support base.

6. The three-dimensional grinding equipment for metal-sealed ball valves as described in claim 5, characterized in that, The support base has a through hole, and the rotating rod is rotatably inserted through the through hole.

7. The three-dimensional grinding equipment for metal-sealed ball valves as described in claim 6, characterized in that, A bearing is provided between the support base and the rotating rod.

8. The three-dimensional grinding equipment for metal-sealed ball valves as described in claim 5, characterized in that, There are two support seats, which are located on both sides of the valve ball. The rotating rod is rotatably inserted through the two support seats and the valve ball.

9. The three-dimensional grinding equipment for metal-sealed ball valves as described in claim 1, characterized in that, The three-dimensional grinding equipment for metal-sealed ball valves also includes a control device, which is electrically connected to the base rotation mechanism, the valve stem axis rotation mechanism, and the swing mechanism, and is used to control the switching and output power of the base rotation mechanism, the valve stem axis rotation mechanism, and the swing mechanism, respectively.

10. The three-dimensional grinding equipment for metal-sealed ball valves as described in claim 9, characterized in that, The control device is a PLC.

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