Self-locking vacuum gate valve

Abstract

The utility model discloses a self-locking vacuum gate valve, which comprises a valve body, the inserting plate is arranged in the valve body; the air cylinder is used for being in linkage with the inserting plate to move along the valve body, and the inserting plate cuts off or opens the airflow channel in the valve body. The elastic self-locking structure is arranged on the side wall of one side of a cylinder body of the air cylinder; the elastic self-locking structure has a first state and a second state; the first state is a locking state that the elastic self-locking structure locks a piston on the air cylinder, air enters a first space in the cylinder body, air exits a second space in the cylinder body, and the elastic self-locking structure is partially inserted into a locking groove in the piston; the second state is an unlocking state in which the elastic self-locking structure is separated from the piston, air enters the second space, air exits the first space, the elastic self-locking structure is pushed to be partially retracted, and the elastic self-locking structure is partially separated from the locking groove; therefore, the technical problems that the sealing effect is relatively poor and the reliability is relatively poor are solved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a self-locking vacuum slide gate valve. Background Technology

[0002] Vacuum slide gate valves are widely used in vacuum systems, primarily for cutting off or opening gas flow in ultra-high vacuum or high vacuum environments.

[0003] The structure of a vacuum slide gate valve generally includes: valve body, slide gate, cylinder, seals, and fasteners. The cylinder moves the slide gate in conjunction with the valve body, and the slide gate cuts off or opens the airflow passage on the valve body. Since the slide gate is directly driven by the cylinder to cut off the airflow passage, if the cylinder's continuous air supply or input air pressure is unstable, the position of the slide gate will be uncertain, the sealing performance of the slide gate will decrease, and it will be unable to completely cut off the airflow passage. This will affect the continuity and stability of the vacuum slide gate valve's seal, resulting in a relatively poor sealing effect and relatively poor reliability. Utility Model Content

[0004] In view of the above-mentioned shortcomings in the related technologies, the purpose is to provide a self-locking vacuum slide gate valve to solve the technical problems of relatively poor sealing effect and relatively poor reliability in the related technologies.

[0005] The technical solution to achieve the objective is: a self-locking vacuum slide gate valve, comprising: a valve body; a slide gate disposed within the valve body; and a cylinder connected to one end of the valve body for linkage with the slide gate to move along the valve body, wherein the slide gate cuts off or opens the airflow passage on the valve body; further comprising: at least one elastic self-locking structure disposed on one side wall of the cylinder body on the cylinder.

[0006] The elastic self-locking structure has a first state and a second state;

[0007] The first state is that the elastic self-locking structure locks the piston on the cylinder in a self-locking state, air enters at the first space on the cylinder body, air exits at the second space on the cylinder body, the piston moves within the cylinder body, the piston moves along the valve body in conjunction with the insert plate, the conical surface on one end of the piston pushes the elastic self-locking structure to partially retract until the piston is in place, the insert plate cuts off the airflow channel, and the partial insertion of the elastic self-locking structure into the locking groove on the piston;

[0008] The second state is that the elastic self-locking structure is disengaged from the piston in the unlocked state, air enters the second space, air exits the first space, and the gas entering the second space pushes the elastic self-locking structure to partially retract, the elastic self-locking structure partially disengages from the locking groove, the piston moves along the cylinder body, and the piston, in conjunction with the insert plate, opens the airflow channel.

[0009] Furthermore, the number of the elastic self-locking structures is one, which is disposed on one side wall of the cylinder body, close to the valve body.

[0010] Furthermore: the elastic self-locking structure includes: a seat body connected to one side wall of the cylinder body, the seat body having a stepped space, the stepped space penetrating the seat body;

[0011] A vent is provided on one side wall of the cylinder body and communicates with the stepped space;

[0012] A spring is disposed in the stepped space;

[0013] A piston pin is disposed in the stepped space, with one end abutting against the spring and the other end used to insert into the cylinder.

[0014] A first sealing element is disposed between the seat and the cylinder, surrounding the piston pin and spaced apart from the piston pin;

[0015] And a second seal is disposed between the piston pin and the seat.

[0016] Furthermore, the base has a rectangular block-shaped structure.

[0017] Furthermore, the vent hole is a round hole.

[0018] Furthermore, the spring is a cylindrical spring.

[0019] Furthermore: the piston pin includes: a circular block disposed in the stepped space, one end of which abuts against the spring, and the second sealing element is disposed on the outer circle;

[0020] A circular shaft segment is provided on the other end of the circular block for insertion into a through hole on the side wall of the cylinder, and the outer diameter of the circular shaft segment is smaller than the outer diameter of the circular block.

[0021] Furthermore: the first seal is an O-ring.

[0022] Furthermore: the second seal is an O-ring.

[0023] Furthermore, the locking groove is provided around the outer edge of the piston for insertion into the circular shaft segment.

[0024] The above technical solution has the following beneficial effects: a self-locking vacuum slide gate valve, compared with related technologies, is provided with a valve body, slide gate, cylinder and elastic self-locking structure;

[0025] The elastic self-locking structure has a first state and a second state;

[0026] The first state is that the elastic self-locking structure locks the piston on the cylinder in a self-locking state. Air enters at the first space on the cylinder body and air exits at the second space on the cylinder body. The piston moves within the cylinder body, and the piston linkage plate moves along the valve body. The conical surface on one end of the piston pushes the partial retraction of the elastic self-locking structure until the piston is in place. Then, the plate cuts off the airflow channel, and the partial elastic self-locking structure is inserted into the locking groove on the piston.

[0027] The second state is the unlocked state where the elastic self-locking structure disengages from the piston. Air enters the second space and exits the first space. The gas entering the second space pushes the elastic self-locking structure to partially retract, causing the elastic self-locking structure to partially disengage from the locking groove. The piston moves along the cylinder body, and the piston linkage plate opens the airflow channel.

[0028] After the piston is in position, the insert plate cuts off the airflow channel. Due to the partial insertion of the elastic self-locking structure into the locking groove on the piston, the piston is positioned and will not move due to unstable air supply pressure. The sealing effect is relatively good, ensuring the effect of cutting off the airflow channel and the reliability is relatively good.

[0029] This overcomes the technical problems of relatively poor sealing effect and relatively poor reliability, and achieves a technical effect of relatively good sealing effect and relatively good reliability, thus having practicality. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall assembly structure;

[0031] Figure 2 for Figure 1 One of the partial sectional views;

[0032] Figure 3 for Figure 1 Partial sectional view two;

[0033] In the diagram: 10. Elastic self-locking structure, 10-1. Seat, 10-11. Stepped space, 10-2. Vent hole, 10-3. Spring, 10-4. Piston pin, 10-41. Circular block, 10-42. Circular shaft section, 10-5. First seal, 10-6. Second seal, 100. Valve body, 101. Airflow channel, 200. Insert plate, 300. Cylinder, 301. Cylinder body, 301-1. First space, 301-2. Second space, 301-3. Through hole, 302. Piston, 302-1. Conical surface, 302-2. Locking groove. Detailed Implementation

[0034] To make the content easier to understand, the following detailed description is provided with reference to specific embodiments and accompanying drawings;

[0035] A self-locking vacuum slide gate valve solves the technical problems of relatively poor sealing effect and relatively poor reliability in related technologies. It can be manufactured and used, achieving the positive effects of relatively good sealing effect and relatively good reliability. The overall concept is as follows:

[0036] Implementation

[0037] like Figure 1 , Figure 2 , Figure 3 As shown; a self-locking vacuum slide gate valve includes: a valve body 100; a slide gate 200 disposed within the valve body 100; and a cylinder 300 connected to one end of the valve body 100 for linkage with the slide gate 200 to move along the valve body 100, wherein the slide gate 200 cuts off or opens the airflow passage 101 on the valve body 100; characterized in that it further includes: at least one elastic self-locking structure 10 disposed on one side wall of the cylinder body 301 on the cylinder 300;

[0038] The elastic self-locking structure 10 has a first state and a second state;

[0039] The first state is that the elastic self-locking structure 10 locks the piston 302 on the cylinder 300 in a self-locking state, air enters through the first space 301-1 on the cylinder body 301, air exits through the second space 301-2 on the cylinder body 301, the piston 302 moves within the cylinder body 301, the piston 302 moves along the valve body 100 in conjunction with the insert plate 200, the conical surface 302-1 on one end of the piston 302 pushes the elastic self-locking structure 10 to partially retract until the piston 302 is in place, the insert plate 200 cuts off the airflow channel 101, and the elastic self-locking structure 10 partially inserts into the locking groove 302-2 on the piston 302;

[0040] The second state is that the elastic self-locking structure 10 is disengaged from the piston 302 in the unlocked state, air enters at the second space 301-2, air exits at the first space 301-1, and the gas entering at the second space 301-2 pushes the elastic self-locking structure 10 to partially retract, the elastic self-locking structure 10 partially disengages from the locking groove 302-2, the piston 302 moves along the cylinder 301, and the piston 302, in conjunction with the insert plate 200, opens the airflow channel 101;

[0041] After the piston 302 is in position, the insert plate 200 cuts off the airflow channel 101. Due to the partial insertion of the elastic self-locking structure 10 into the locking groove 302-2 on the piston 302, self-locking is achieved, so that the piston 302 is positioned and will not move due to unstable air supply pressure. The sealing effect is relatively good, ensuring the effect of cutting off the airflow channel 101 and the reliability is relatively good.

[0042] Another implementation method:

[0043] like Figure 1 , Figure 2 , Figure 3 As shown; in practice, the number of the elastic self-locking structure 10 is one, which is set on one side wall of the cylinder 301, close to the valve body 100;

[0044] The elastic self-locking structure 10 is provided. When the insert plate 200 cuts off the airflow channel 101, the elastic self-locking structure 10 is partially inserted into the locking groove 302-2 on the piston 302 to achieve self-locking. The reliability is relatively good and the sealing effect is relatively good.

[0045] The elastic self-locking structure 10 includes: a seat 10-1 connected to one side wall of the cylinder 301, the seat 10-1 having a stepped space 10-11 that penetrates the seat 10-1; a vent 10-2 disposed on one side wall of the cylinder 301 and communicating with the stepped space 10-11; a spring 10-3 disposed in the stepped space 10-11; a piston pin 10-4 disposed in the stepped space 10-11, one end abutting against the spring 10-3 and the other end for insertion into the cylinder 301; a first seal 10-5 disposed between the seat 10-1 and the cylinder 301, surrounding the piston pin 10-4 and spaced apart from the piston pin 10-4; and a second seal 10-6 disposed between the piston pin 10-4 and the seat 10-1.

[0046] The seat 10-1 has a rectangular block structure and is connected to the cylinder 301 by internal hexagon bolts, making assembly relatively convenient.

[0047] The stepped space 10-11 is provided, which is conducive to the installation of spring 10-3 and piston pin 10-4, and piston pin 10-4 can move along the position, resulting in relatively good structural reliability.

[0048] The vent 10-2 is a round hole, which facilitates the entry of gas into the stepped space 10-11, pushing the piston pin 10-4 to move towards the spring 10-3. The spring 10-3 is compressed, and the piston pin 10-4 disengages from the locking groove 302-2.

[0049] The spring 10-3 is a cylindrical spring, which has the functions of elastic buffering and support, and is beneficial to support the piston pin 10-4 when the piston pin 10-4 is inserted into the locking groove 302-2.

[0050] The piston pin 10-4 includes: a circular block 10-41 disposed in the stepped space 10-11, one end of which abuts against the spring 10-3, and the second sealing element 10-6 is disposed on the outer circle; and a circular shaft segment 10-42 disposed on the other end of the circular block 10-41 for insertion into the through hole 301-3 on the side wall of the cylinder 301, and the outer diameter of the circular shaft segment 10-42 is smaller than the outer diameter of the circular block 10-41; the circular block 10-41 and the circular shaft segment 10-42 are integrally formed, and the shape is roughly "T" shaped, which is conducive to being disposed in the stepped space 10-11, and can move along the stepped space 10-11, so that when the circular shaft segment 10-42 passes through the through hole 301-3, it is inserted into the locking groove 302-2, and when the circular shaft segment 10-42 retracts, it disengages from the locking groove 302-2;

[0051] The first sealing element 10-5 is an O-ring, which ensures a tight seal;

[0052] The second sealing element 10-6 is an O-ring, which ensures a tight seal;

[0053] Among them, the valve body 100, the slide plate 200 and the cylinder 300 are common structures in the prior art and are not the inventive point of this utility model. They are only used to better describe this utility model and facilitate understanding of the technical solution of this utility model. Those skilled in the art can directly and without doubt know how to set the valve body 100, the slide plate 200 and the cylinder 300 after seeing the disclosed content, without needing to put in creative effort or conduct excessive experiments.

[0054] The airflow channel 101 is roughly cylindrical.

[0055] Piston 302 divides the cylinder 301 into a first space 301-1 and a second space 301-2;

[0056] When air enters at the first space 301-1, air exits at the second space 301-2. The piston 302 moves along the cylinder 301, and the piston 302 moves along the valve body 100 in conjunction with the insert plate 200. The insert plate 200 cuts off the airflow passage 101.

[0057] When air enters at the second space 301-2, air exits at the first space 301-1. The piston 302 moves along the cylinder 301, and the piston 302 moves along the valve body 100 in conjunction with the insert plate 200. The insert plate 200 opens the airflow passage 101.

[0058] The tapered surface 302-1 is provided to facilitate the retraction of the piston pin 10-4;

[0059] The locking groove 302-2 is provided around the outer edge of the piston 302. The locking groove 302-2 is an annular groove, which is conducive to the insertion with the circular shaft section 10-42.

[0060] The working principle is as follows: the elastic self-locking structure 10 has a first state and a second state;

[0061] The first state is that the elastic self-locking structure 10 locks the piston 302 on the cylinder 300 in a self-locking state. Air enters through the first space 301-1 on the cylinder body 301 and exits through the second space 301-2 on the cylinder body 301. The piston 302 moves within the cylinder body 301. The piston 302 moves along the valve body 100 with the linkage of the insert plate 200. The conical surface 302-1 on one end of the piston 302 pushes the piston pin 10-4. The piston pin 10-4 moves towards the spring 10-3, compressing the spring 10-3. The other end of the piston pin 10-4 retracts from the cylinder body 301 until the piston 302 is in position. Then, the insert plate 200 cuts off the airflow channel 101. Under the action of the spring 10-3, the piston pin 10-4 is inserted into the locking groove 302-2 on the piston 302.

[0062] The second state is that the elastic self-locking structure 10 is released from the piston 302, the second space 301-2 is filled with air, the first space 301-1 is filled with air, the air entering the second space 301-2 pushes the piston pin 10-4 through the vent 10-2, the piston pin 10-4 compresses the spring 10-3, the other end of the piston pin 10-4 retracts from the cylinder 301, the piston pin 10-4 disengages from the locking groove 302-2, the piston 302 moves along the position of the cylinder 301, and the piston 302 links the insert plate 200 to open the airflow channel 101;

[0063] In the description, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings, and are only for the convenience or simplification of the description, rather than indicating a specific orientation that must be present; the operation process described in the embodiments is not an absolute usage step, and corresponding adjustments can be made in actual use;

[0064] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art; the words “first,” “second,” and similar terms used in the specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components, and similarly, the words “a” or “a” and similar terms do not determine a quantity limitation, but rather indicate the presence of at least one, as determined by the content of the embodiments;

[0065] The above description is only a preferred embodiment, but the scope of protection is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the disclosed technology, based on the technical solution and inventive concept, should be included within the scope of protection.

Claims

1. A self-locking vacuum slide gate valve, comprising: Valve body; A slide plate is disposed within the valve body; The cylinder is connected to one end of the valve body and is used to move the insert plate along the valve body, wherein the insert plate cuts off or opens the airflow passage on the valve body; characterized in that it further includes: at least one elastic self-locking structure, which is disposed on one side wall of the cylinder body on the cylinder. The elastic self-locking structure has a first state and a second state; The first state is that the elastic self-locking structure locks the piston on the cylinder in a self-locking state, air enters at the first space on the cylinder body, air exits at the second space on the cylinder body, the piston moves within the cylinder body, the piston moves along the valve body in conjunction with the insert plate, the conical surface on one end of the piston pushes the elastic self-locking structure to partially retract until the piston is in place, the insert plate cuts off the airflow channel, and the partial insertion of the elastic self-locking structure into the locking groove on the piston; The second state is that the elastic self-locking structure is disengaged from the piston in the unlocked state, air enters the second space, air exits the first space, and the gas entering the second space pushes the elastic self-locking structure to partially retract, the elastic self-locking structure partially disengages from the locking groove, the piston moves along the cylinder body, and the piston, in conjunction with the insert plate, opens the airflow channel.

2. The self-locking vacuum slide gate valve according to claim 1, characterized in that: The number of the elastic self-locking structure is one, which is set on one side wall of the cylinder body, close to the valve body.

3. A self-locking vacuum slide gate valve according to claim 1 or 2, characterized in that: The elastic self-locking structure includes: a seat body connected to one side wall of the cylinder body, the seat body having a stepped space that penetrates the seat body; A vent is provided on one side wall of the cylinder body and communicates with the stepped space; A spring is disposed in the stepped space; A piston pin is disposed in the stepped space, with one end abutting against the spring and the other end used to insert into the cylinder. A first sealing element is disposed between the seat and the cylinder, surrounding the piston pin and spaced apart from the piston pin; And a second seal is disposed between the piston pin and the seat.

4. A self-locking vacuum slide gate valve according to claim 3, characterized in that: The base has a rectangular block-shaped structure.

5. A self-locking vacuum slide gate valve according to claim 3, characterized in that: The vent is a round hole.

6. A self-locking vacuum slide gate valve according to claim 3, characterized in that: The spring is a cylindrical spring.

7. A self-locking vacuum slide gate valve according to claim 3, characterized in that: The piston pin includes: a circular block disposed in the stepped space, one end of which abuts against the spring, and the second sealing element is disposed on the outer circle; A circular shaft segment is provided on the other end of the circular block for insertion into a through hole on the side wall of the cylinder, and the outer diameter of the circular shaft segment is smaller than the outer diameter of the circular block.

8. A self-locking vacuum slide gate valve according to claim 3, characterized in that: The first sealing element is an O-ring.

9. A self-locking vacuum slide gate valve according to claim 3, characterized in that: The second seal is an O-ring.

10. A self-locking vacuum slide gate valve according to claim 7, characterized in that: The locking groove is provided around the outer edge of the piston and is used to insert into the circular shaft section.

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