High-stability vacuum gate valve

Abstract

The utility model relates to the technical field of valves, in particular to a high-stability vacuum gate valve which comprises a valve body, a first valve plate is arranged at the lower end of a telescopic rod, ports are formed in the front inner wall and the rear inner wall of a first cavity, a plurality of mounting blocks are arranged on the surfaces of the two sides of the first valve plate, and mounting through holes are formed in the surfaces of the mounting blocks. First springs are arranged on the upper surfaces of the two mounting blocks correspondingly, second valve plates are arranged on the front sides of the front surfaces and the rear surfaces of the first valve plates correspondingly, second springs are arranged at one ends of the multiple supporting rods correspondingly, inclined planes are arranged at the lower ends of the two second valve plates correspondingly, and the surfaces of the two inclined planes are close to the first valve plates from top to bottom correspondingly. When the two second valve plates are abraded, due to the fact that the second spring is in the compressed state, the two second valve plates are pushed outwards respectively, it can also be guaranteed that the two second valve plates make tight contact with the through opening, and the sealing problem cannot occur.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-stability vacuum plug-in valve. Background Art

[0002] The gate valve is also called a manual knife gate valve. The knife gate valve is a valve in which the gate and the valve seat are always in close contact and sealed. The principle is that a round opening of the same diameter is opened on the gate, and the round opening on the gate is completely separated from and matched with the diameter by opening and closing the gate. The advantage of this valve is that there is no groove in the valve body diameter, the medium will not be blocked, and it has a full-diameter flow characteristic. Its sealing structure can be divided into soft sealing and hard sealing structures. The penetrating knife gate valve has the characteristics of precise structure, good processability, and compact structure. The sealing valve seat is a movable structure design with anti-wear and automatic compensation functions, so it has a longer life. During the closing and opening process, the valve seat and the gate are always in close contact, so that the valve opening and closing force is stable, and it has the characteristics of cutting off the medium.

[0003] For example, the authorization announcement number "CN211779068U" is named a high-stability gate valve. Although the structural design is reasonable, the gate is driven by a driving mechanism to open and close, the movement is smooth, the service life is long, and it can maintain a stable working state for a long time. When the gate is closed, the positioning seat forms a position to ensure the stability of the closed state, and when the gate is opened, it will be limited by the limiting structure to avoid interference between structural parts. The structure has good stability and high reliability. However, if the gate is opened and closed for a long time, it will cause wear on the gate, resulting in loose contact between the gate and the two side ports, resulting in sealing problems; at the same time, if the gate is opened and closed for a long time, the gate and the positioning seat will have poor contact, and there will also be sealing problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a high-stability vacuum plug valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A high-stability vacuum plug valve is designed, comprising a valve body, a first cavity is arranged inside the valve body, a cylinder is arranged on the upper surface of the valve body, a telescopic rod is arranged on the lower surface of the cylinder, the telescopic rod penetrates the valve body and extends into the first cavity, a first valve plate is arranged at the lower end of the telescopic rod, through openings are arranged on the front and rear inner walls of the first cavity, a plurality of mounting blocks are arranged on both side surfaces of the first valve plate, mounting through holes are arranged on the surfaces of the plurality of mounting blocks, a first limiting block is arranged inside the mounting through hole arranged on one side surface of the first valve plate, a first spring is arranged on the upper surface of the two mounting blocks, and the upper ends of the two first springs are connected The upper inner wall of the first cavity is connected, and second valve plates are provided on the positive sides of the front and rear surfaces of the first valve plate, and multiple second cavities are provided inside the two second valve plates, and multiple support rods are provided on the front and rear surfaces of the first valve plate, and one end of multiple support rods penetrates the second valve plate and extends into the second cavity, and two second limit blocks are provided at one end of the two support rods close to the second cavity, and one end of multiple support rods is provided with a second spring, and the other ends of multiple second springs are connected to the inner wall of the second cavity, and the lower ends of the two second valve plates are provided with inclined surfaces, and the surfaces of the two inclined surfaces are close to the first valve plate from top to bottom.

[0007] Preferably, a bearing block is provided at the lower end of the telescopic rod, and fixing blocks are provided on both sides of the lower surface of the bearing block, and the lower ends of the two fixing blocks are connected to the upper surface of the first valve plate.

[0008] Preferably, a third limit block is provided on the lower inner wall of the first cavity, and the third limit block is arranged just below the two through openings.

[0009] Preferably, a groove is provided on the upper surface of the third limiting block, and a first rubber pad is provided inside the groove.

[0010] Preferably, a third spring is disposed on the lower surface of the two mounting blocks, and the lower ends of the two third springs are connected to the upper inner wall of the first cavity.

[0011] Preferably, a second rubber pad is provided at the lower end of the first valve plate, and a third rubber pad is provided at the lower ends of the two second valve plates.

[0012] The utility model proposes a high-stability vacuum plug valve, which has the following beneficial effects: first, the cylinder is started to move the first valve plate downward along the two first limit blocks, and the two second valve plates are squeezed by the two ports through the two inclined surfaces, so that the second spring is compressed, and at the same time, the first valve plate and the two second valve plates continue to move downward to reach the position of closing the ports. When the two second valve plates are worn, the second spring is in a compressed state, and the two second valve plates are pushed outward respectively, which also ensures that the two second valve plates are in close contact with the ports, and there will be no sealing problems. At this time, the two first springs are in a compressed state, so that the first valve plate and the two second valve plates are firmly pressed against the third limit block. When the first valve plate and the third limit block are worn, the downward compression force of the third spring makes the first valve plate and the third limit block in good contact, and there will be no sealing problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front cross-sectional view of the utility model;

[0014] Figure 2 It is a left side sectional view of the utility model;

[0015] Figure 3 This is an enlarged view of position A of the utility model;

[0016] Figure 4 It is an enlarged view of position B of the present utility model.

[0017] In the figure: valve body 1, first cavity 2, cylinder 3, telescopic rod 4, first valve plate 5, through port 6, mounting block 7, mounting through hole 8, first limit block 9, first spring 10, second valve plate 11, second cavity 12, support rod 13, second limit block 14, second spring 15, inclined surface 16, bearing block 17, fixing block 18, third limit block 19, first rubber pad 20, third spring 21, second rubber pad 22, third rubber pad 23. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-4A high-stability vacuum plug valve comprises a valve body 1, a first cavity 2 is arranged inside the valve body 1, a cylinder 3 is arranged on the upper surface of the valve body 1, a telescopic rod 4 is arranged on the lower surface of the cylinder 3, the telescopic rod 4 penetrates the valve body 1 and extends into the first cavity 2, a first valve plate 5 is arranged at the lower end of the telescopic rod 4, through openings 6 are arranged on the front and rear inner walls of the first cavity 2, a plurality of mounting blocks 7 are arranged on both side surfaces of the first valve plate 5, mounting through holes 8 are arranged on the surfaces of the plurality of mounting blocks 7, a first limiting block 9 is arranged inside the mounting through holes 8 arranged on one side surface of the first valve plate 5, a first spring 10 is arranged on the upper surface of the two mounting blocks 7, the upper ends of the two first springs 10 are connected to the upper inner wall of the first cavity 2, the first A second valve plate 11 is provided on the front and rear sides of a valve plate 5, and a plurality of second cavities 12 are provided inside the two second valve plates 11. A plurality of support rods 13 are provided on the front and rear surfaces of the first valve plate 5, and one end of the plurality of support rods 13 penetrates the second valve plate 11 and extends into the second cavity 12. Two second limit blocks 14 are provided on one end of the two support rods 13 close to the second cavity 12, and a second spring 15 is provided at one end of the plurality of support rods 13, and the other ends of the plurality of second springs 15 are connected to the inner wall of the second cavity 12. An inclined surface 16 is provided at the lower end of the two second valve plates 11, and the surfaces of the two inclined surfaces 16 are close to the first valve plate 5 from top to bottom, so as to be squeezed by the two through ports 6.

[0020] A bearing block 17 is disposed at the lower end of the telescopic rod 4 , and fixing blocks 18 are disposed on both sides of the lower surface of the bearing block 17 , so that the first valve plate 5 is fixed more stably. The lower ends of the two fixing blocks 18 are connected to the upper surface of the first valve plate 5 .

[0021] A third limit block 19 is disposed on the lower inner wall of the first cavity 2 . The third limit block 19 is disposed just below the two through openings 6 . The third limit block 19 plays a limiting role.

[0022] A groove is provided on the upper surface of the third limiting block 19, and a first rubber pad 20 is provided inside the groove. The groove can limit the first valve plate 5 and the two second valve plates 11 more stably, and the first rubber pad 20 plays a role of buffering and sealing.

[0023] The lower surfaces of the two mounting blocks 7 are provided with third springs 21, and the lower ends of the two third springs 21 are connected to the upper inner wall of the first cavity 2. The third spring 21 can make the first valve plate 5 move more stably on the first limit block 9. When the first valve plate 5 is in a closed state, the third spring 21 is in a stretched state, ensuring that the first valve plate 5 and the two second valve plates 11 are stably supported on the third limit block 19.

[0024] A second rubber pad 22 is disposed at the lower end of the first valve plate 5, and a third rubber pad 23 is disposed at the lower end of each of the two second valve plates 11. The third rubber pad 23 plays a role of buffering and sealing.

[0025] Working principle: First, start the cylinder 3 to make the first valve plate 5 move downward along the two first limit blocks 9. Through the two inclined surfaces 16, the two second valve plates 11 are squeezed by the two ports 6, so that the second spring 15 is compressed. At the same time, the first valve plate 5 and the two second valve plates 11 continue to move downward to reach the position of closing the port 6. When the two second valve plates 11 are worn, since the second spring 15 is in a compressed state, the two second valve plates 11 are pushed outward respectively, which will also ensure that the two second valve plates 11 are in close contact with the port 6 and there will be no sealing problem. At this time, the two first springs 10 are in a compressed state, so that the first valve plate 5 and the two second valve plates 11 are firmly pressed against the third limit block 19. When the first valve plate 5 and the third limit block 19 are worn, the downward compression force of the third spring 21 makes the first valve plate 5 and the third limit block 19 in good contact and there will be no sealing problem.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-stability vacuum gate valve, comprising a valve body (1), wherein a first cavity (2) is provided inside the valve body (1), and characterized in that: The valve body (1) is provided with a cylinder (3) on its upper surface, and a telescopic rod (4) is provided on its lower surface. The telescopic rod (4) penetrates the valve body (1) and extends into the first cavity (2). A first valve plate (5) is provided at the lower end of the telescopic rod (4). The front and rear inner walls of the first cavity (2) are provided with through openings (6). The surfaces of both sides of the first valve plate (5) are provided with a plurality of mounting blocks (7). The surfaces of the plurality of mounting blocks (7) are provided with mounting through holes (8). A first limiting block (9) is provided inside the mounting through holes (8) provided on one side of the first valve plate (5). The upper surfaces of the two mounting blocks (7) are provided with first springs (10). The upper ends of the two first springs (10) are connected to the upper inner wall of the first cavity (2). The front and rear surfaces of the first valve plate (5) are provided with a plurality of mounting blocks (7). A second valve plate (11) is provided on the front side of the surface, and a plurality of second cavities (12) are provided inside the two second valve plates (11). A plurality of support rods (13) are provided on the front and rear surfaces of the first valve plate (5), and one end of the plurality of support rods (13) passes through the second valve plate (11) and extends into the second cavity (12). Two second limit blocks (14) are provided at one end of the two support rods (13) close to the second cavity (12). A second spring (15) is provided at one end of the plurality of support rods (13), and the other ends of the plurality of second springs (15) are connected to the inner wall of the second cavity (12). The lower ends of the two second valve plates (11) are provided with inclined surfaces (16), and the surfaces of the two inclined surfaces (16) are close to the first valve plate (5) from top to bottom.

2. A high stability vacuum gate valve according to claim 1, characterized in that: A bearing block (17) is provided at the lower end of the telescopic rod (4), and fixing blocks (18) are provided on both sides of the lower surface of the bearing block (17), and the lower ends of the two fixing blocks (18) are connected to the upper surface of the first valve plate (5).

3. A high stability vacuum gate valve according to claim 1, characterized in that: A third limit block (19) is provided on the lower inner wall of the first cavity (2), and the third limit block (19) is arranged directly below the two through openings (6).

4. A high stability vacuum gate valve according to claim 3, characterized in that: The upper surface of the third limiting block (19) is provided with a groove, and a first rubber pad (20) is provided inside the groove.

5. A high stability vacuum gate valve according to claim 1, characterized in that: A third spring (21) is provided on the lower surface of the two mounting blocks (7), and the lower ends of the two third springs (21) are connected to the upper inner wall of the first cavity (2).

6. A high stability vacuum gate valve according to claim 1, characterized in that: A second rubber pad (22) is provided at the lower end of the first valve plate (5), and a third rubber pad (23) is provided at the lower end of each of the two second valve plates (11).

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