Valve plate connecting structure of vacuum pendulum valve

Abstract

The utility model discloses a valve plate connecting structure of a vacuum pendulum valve, and relates to the technical field of vacuum pendulum valves, the vacuum pendulum valve comprises a valve body, and the valve body is provided with a valve port for fluid to pass through; a machine shell is arranged on one side of the valve body, and a motor is arranged in the machine shell. A valve plate is arranged in the valve body, and a connecting arm is arranged on one side of the valve plate; an output shaft of the motor is in transmission connection with a telescopic limiting mechanism, and one end of the connecting arm is detachably connected with the limiting mechanism; the central axis of the output shaft of the motor, the telescopic direction of the limiting mechanism and the central axis of the valve plate are all parallel to the central axis of the valve port. By installing the limiting mechanism on the output shaft of the motor, on one hand, rapid connection of the valve plate and the output shaft of the motor can be achieved; and on the other hand, the working condition of the valve plate installed on the vacuum pendulum valve can be adapted, when the valve plate swings to the valve closing position under the control of the motor, the valve plate can move by a certain distance along the axis of the output shaft of the motor, and the valve port is completely sealed under the cooperation of a corresponding sealing mechanism.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pendulum valve technology, and more specifically, to a valve plate connection structure for a vacuum pendulum valve. Background Technology

[0002] Vacuum valves are components used in vacuum systems to change the direction of fluid flow, regulate the flow rate, and disconnect or connect pipelines. Among them, the vacuum pendulum valve, as a type of vacuum valve, occupies an important position in the vacuum valve field due to its advantages of small footprint and fast closing speed.

[0003] For existing mainstream pendulum valves, the valve closing action is mainly completed in two steps. First, the valve plate is controlled by a motor to swing to the closed position. At this point, the valve plate can block the valve port, but it is not completely sealed. Then, the sealing mechanism installed in the valve body pushes the valve plate to press it tightly against the valve port, thus achieving a vacuum seal. In the above process, when the valve plate is in the closed position, it needs to move a certain distance along the central axis of the valve port so that the valve port can be completely sealed under the push of the sealing mechanism. However, the connection method of the drive motor of the valve plate in existing pendulum valves is relatively complicated and inconvenient to disassemble. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a valve plate connection structure for a vacuum pendulum valve.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A valve plate connection structure for a vacuum pendulum valve is disclosed. The vacuum pendulum valve includes a hollow valve body with a valve port for fluid passage. A housing is disposed on one side of the valve body, and a motor is disposed within the housing. A cylindrical valve plate is disposed within the valve body, and a connecting arm is disposed on one side of the valve plate. The output shaft of the motor is driven by a retractable limiting mechanism, and the end of the connecting arm away from the valve plate is detachably connected to the limiting mechanism. The central axis of the motor's output shaft, the extension / retraction direction of the limiting mechanism, and the central axis of the valve plate are all parallel to the central axis of the valve port.

[0007] Furthermore, in this utility model, the limiting mechanism includes a rotating sleeve rotatably disposed within the housing and a sliding sleeve fixed to the rotating sleeve by screws. The end of the rotating sleeve away from the sliding sleeve is connected to the output shaft of the motor, and the end of the connecting arm away from the valve plate is engaged with the sliding sleeve. The central axis of the rotating sleeve and the central axis of the sliding sleeve are both collinear with the central axis of the output shaft of the motor. A support ring is provided at the end of the sliding sleeve away from the rotating sleeve, and a thrust-stopping mechanism is provided on the sliding sleeve, which fixes the connecting arm to the support ring.

[0008] Furthermore, in this utility model, a countersunk hole is provided at the end of the rotating sleeve away from the motor, the central axis of the countersunk hole is collinear with the central axis of the output shaft of the motor, and the sliding sleeve is located inside the countersunk hole; the thrust-stopping mechanism includes a flexible washer and a spring both sleeved on the sliding sleeve, one end of the spring is connected to the bottom wall of the countersunk hole, and the other end is connected to the flexible washer; when the connecting arm is engaged with the sliding sleeve, the side wall of the flexible washer away from the spring abuts against the connecting arm.

[0009] Furthermore, in this utility model, the flexible gasket includes an integrally formed transition ring and a limiting ring. The limiting ring is disposed on the side of the transition ring away from the spring, and the inner diameter of the limiting ring is larger than the inner diameter of the transition ring. A limiting clamp is provided on the sliding sleeve, and the limiting clamp is located between the transition ring and the supporting ring. The outer diameter of the limiting clamp is less than or equal to the inner diameter of the limiting ring.

[0010] Furthermore, in this utility model, the end of the connecting arm away from the valve plate is provided with an oblong hole that is adapted to the sliding sleeve, and the oblong hole engages with the sliding sleeve.

[0011] The beneficial effects of this utility model are:

[0012] This utility model provides a valve plate connection structure for a vacuum pendulum valve. By installing a limiting mechanism on the output shaft of the motor, the valve plate can be quickly connected to the motor output shaft. On the other hand, it can adapt to the working conditions of the valve plate installed on the vacuum pendulum valve. When the valve plate swings to the closed position under the control of the motor, the valve plate can move a certain distance along the axis of the motor output shaft, and with the cooperation of the corresponding sealing mechanism, the valve port can be completely sealed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the vacuum pendulum valve according to an embodiment of the present invention;

[0014] Figure 2 for Figure 1 Top view;

[0015] Figure 3 for Figure 2 Sectional view of section AA;

[0016] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0017] Figure 5 This is a schematic diagram of the valve plate in an embodiment of the present utility model.

[0018] In the diagram: 101-valve body; 201-valve port; 301-machine housing; 401-motor; 501-valve plate; 502-connecting arm; 503-waist-shaped hole; 601-rotating sleeve; 602-screw; 603-sliding sleeve; 604-support ring; 701-counterhead; 801-flexible gasket; 802-spring; 901-limiting clamp. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Please see Figure 1-5 This utility model provides a technical solution:

[0021] A valve plate connection structure for a vacuum pendulum valve, the structure of which is existing technology, specifically includes a hollow valve body 101 with a valve port 201 for fluid passage. A housing 301 is mounted on one side of the valve body 101, and a motor 401 is installed inside the housing 301. A cylindrical valve plate 501 is placed inside the valve body 101, and a connecting arm 502 is mounted on one side of the valve plate 501. The end of the connecting arm 502 away from the valve plate 501 is detachably connected to the output shaft of the motor 401 via a limiting mechanism. Furthermore, the central axis of the motor 401's output shaft, the extension / retraction direction of the limiting mechanism, and the central axis of the valve plate 501 are all parallel to the central axis of the valve port 201.

[0022] Specifically, refer to Figure 3 and Figure 4In this embodiment, the limiting mechanism includes a rotating sleeve 601 rotatably disposed within the housing 301 and a sliding sleeve 603 fixed to the bottom end of the rotating sleeve 601 by screws 602. The sliding sleeve 603 is threadedly connected to the screws 602, and the top end of the rotating sleeve 601 is drively connected to the output shaft of the motor 401. The end of the connecting arm 502 away from the valve plate 501 has an oblong hole 503 adapted to the sliding sleeve 603, which engages with the sliding sleeve 603. The central axis of both the rotating sleeve 601 and the sliding sleeve 603 are collinear with the central axis of the output shaft of the motor 401. After the connecting arm 502 is engaged with the sliding sleeve 603, a support ring 604 is installed at the bottom end of the sliding sleeve 603 to facilitate limiting the axial displacement of the connecting arm 502 on the sliding sleeve 603. The diameter of the support ring 604 is larger than the outer diameter of the sliding sleeve 603. A thrust mechanism is installed on the sliding sleeve 603 above the support ring 604, and the thrust mechanism fixes the connecting arm 502 to the support ring 604. This structure also allows the connecting arm 502 to be removed without completely removing the screw 602.

[0023] Reference Figure 3 and Figure 4 To facilitate the enclosure of components such as the sliding sleeve 603 and the thrust mechanism, a countersunk hole 701 is provided at the bottom end of the rotating sleeve 601 in this embodiment. The central axis of the countersunk hole 701 is collinear with the central axis of the output shaft of the motor 401, and the sliding sleeve 603 is located inside the countersunk hole 701. The thrust mechanism includes a flexible washer 801 and a spring 802 both sleeved on the sliding sleeve 603. The top end of the spring 802 is connected to the bottom wall of the countersunk hole 701, and its bottom end is connected to the flexible washer 801. When the connecting arm 502 is engaged with the sliding sleeve 603, the side wall of the flexible washer 801 away from the spring 802 is always in contact with the connecting arm 502 under the elastic force of the spring 802.

[0024] from Figure 3 or Figure 4 From the perspective of the sliding sleeve 603, when the oblong hole 503 on the connecting arm 502 is engaged with the sliding sleeve 603, the bottom of the flexible gasket 801 is always in contact with the connecting arm 502 under the action of the upper spring 802. In this case, although this structure can limit the displacement of the connecting arm 502 in the axial direction of the sliding sleeve 603, if the elastic force of the spring 802 is large, the pressure on the part of the flexible gasket 801 in contact with the spring 802 will be large. After long-term use, the overall thickness of the flexible gasket 801 will decrease. After the overall thickness of the flexible gasket 801 decreases, the spring 802 will lengthen, and the elastic force after lengthening will decrease. As a result, the pressure acting on the connecting arm 502 will decrease, thus affecting the stability of the connection between the connecting arm 502 and the sliding sleeve 603.

[0025] Therefore, to solve the above problems, in this embodiment, the flexible gasket 801 includes an integrally formed transition ring and a limiting ring. The bottom end of the spring 802 is connected to the top wall of the transition ring, and the limiting ring is installed on the bottom wall of the transition ring, with the inner diameter of the limiting ring being larger than the inner diameter of the transition ring. A limiting clamp 901 is fixedly installed on the sliding sleeve 603, located between the transition ring and the supporting ring 604, with the outer diameter of the limiting clamp 901 being less than or equal to the inner diameter of the limiting ring. When the bottom wall of the transition ring abuts against the top wall of the limiting clamp 901, the limiting ring abuts against the connecting arm 502. The pressure from the spring 802 acts directly on the transition ring, and the pressure on the transition ring is greater than that on the limiting ring. Thus, when the elastic force of the spring 802 is too large, its elastic force acts on the transition ring first. At the same time, due to the presence of the limiting clamp 901, the deformation of the transition ring is greater than that of the limiting ring after long-term use. Thus, the overall deformation of the flexible gasket 801 composed of the limiting ring and the transition ring is smaller than that of the flexible gasket 801 without the limiting clamp 901. This results in a longer lifespan for the flexible gasket 801, ensuring that the pressure on the connecting arm 502 remains within a reasonable range and improving the stability of its connection with the sliding sleeve 603.

[0026] Working principle:

[0027] from Figure 3 or Figure 4 From the perspective of [unclear context], when installing the connecting arm 502, tightening the screw 602 causes it to move downwards. The sliding sleeve 603 moves downwards synchronously under the influence of the screw 602. After moving a certain distance, due to the presence of the limiting clamp 901, the flexible gasket 801 stops moving downwards, and the sliding sleeve 603 moves downwards a certain distance until it can be inserted into the oblong hole 503 at one end of the connecting arm 502. Then, tightening the screw 602 causes it to move upwards. When the limiting ring abuts against the connecting arm 502, the screw 602 can be moved upwards a little further. At this point, the connecting arm 502 is fixed to the supporting ring 604 by the thrust mechanism. When the motor 401 controls the swing of the connecting arm 502, causing the valve plate 501 to swing to the closed position, the valve plate 501 moves upwards a certain distance under the push of the sealing mechanism. After abutting against the corresponding inner wall of the valve body 101, it completely seals the valve port 201.

[0028] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A valve plate connection structure for a vacuum pendulum valve, the vacuum pendulum valve comprising a hollow valve body (101), wherein a valve port (201) for fluid passage is provided on the valve body (101); a housing (301) is provided on one side of the valve body (101), and a motor (401) is provided inside the housing (301); a cylindrical valve plate (501) is provided inside the valve body (101), and a connecting arm (502) is provided on one side of the valve plate (501); characterized in that: The output shaft of the motor (401) is connected to a retractable limiting mechanism. The end of the connecting arm (502) away from the valve plate (501) is detachably connected to the limiting mechanism. The central axis of the output shaft of the motor (401), the extension direction of the limiting mechanism, and the central axis of the valve plate (501) are all parallel to the central axis of the valve port (201).

2. The valve plate connection structure of a vacuum pendulum valve according to claim 1, characterized in that: The limiting mechanism includes a rotating sleeve (601) rotatably disposed within the housing (301) and a sliding sleeve (603) fixed to the rotating sleeve (601) by screws (602). The end of the rotating sleeve (601) away from the sliding sleeve (603) is connected to the output shaft of the motor (401) for transmission. The end of the connecting arm (502) away from the valve plate (501) is engaged with the sliding sleeve (603). The central axis of the rotating sleeve (601) and the central axis of the sliding sleeve (603) are both collinear with the central axis of the output shaft of the motor (401). A support ring (604) is provided at the end of the sliding sleeve (603) away from the rotating sleeve (601). A thrust-stopping mechanism is provided on the sliding sleeve (603), and the thrust-stopping mechanism fixes the connecting arm (502) on the support ring (604).

3. The valve plate connection structure of a vacuum pendulum valve according to claim 2, characterized in that: The rotating sleeve (601) has a countersunk hole (701) at one end away from the motor (401). The central axis of the countersunk hole (701) is collinear with the central axis of the output shaft of the motor (401). The sliding sleeve (603) is located inside the countersunk hole (701). The thrust-stopping mechanism includes a flexible pad (801) and a spring (802) both sleeved on the sliding sleeve (603). One end of the spring (802) is connected to the bottom wall of the countersunk hole (701), and the other end is connected to the flexible pad (801). When the connecting arm (502) is engaged with the sliding sleeve (603), the side wall of the flexible pad (801) away from the spring (802) abuts against the connecting arm (502).

4. The valve plate connection structure of a vacuum pendulum valve according to claim 3, characterized in that: The flexible gasket (801) includes an integrally formed transition ring and a limiting ring. The limiting ring is located on the side of the transition ring away from the spring (802), and the inner diameter of the limiting ring is larger than the inner diameter of the transition ring. The sliding sleeve (603) is provided with a limiting clamp (901), which is located between the transition ring and the supporting ring (604). The outer diameter of the limiting clamp (901) is smaller than or equal to the inner diameter of the limiting ring.

5. The valve plate connection structure of a vacuum pendulum valve according to claim 3, characterized in that: The connecting arm (502) has a waist-shaped hole (503) at one end away from the valve plate (501) that is adapted to the sliding sleeve (603), and the waist-shaped hole (503) is engaged with the sliding sleeve (603).

Images