Pendulum valve

Abstract

The utility model relates to the technical field of vacuum valves, in particular to a pendulum valve which comprises a valve body and a valve disc, a valve port is formed in the valve body, the valve body is connected with a driving mechanism, the driving mechanism is connected with a connecting rod assembly, the driving mechanism drives the connecting rod assembly to swing, the swing of the connecting rod assembly drives the swing of the valve disc, and the valve disc is connected with the valve port. The valve port is opened or closed through swinging of the valve disc; a valve plate and a plurality of balls are arranged on the valve disc, a sealing piece is arranged on the side, close to the valve port, of the valve plate, a concave part is arranged on the valve plate, the position of the concave part corresponds to that of the balls, and the balls enter the concave part when the balls rotate along with the inner disc, so that the distance between the valve port and the valve plate can be increased, and the service life of the valve is prolonged. And the sealing element is prevented from being extruded.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vacuum valves, and particularly to a pendulum valve. Background Art

[0002] A pendulum valve is composed of a valve body, a valve disc and a transmission device, and is a kind of valve commonly used to control fluid media. The valve body is the main part of the pendulum valve, usually square or circular. The valve disc is the key component of the valve, which is connected to the transmission device to realize the opening and closing of the valve. The action principle of the pendulum valve is based on the movement law of a pendulum. When the valve is closed, a sealed closed state is formed between the valve disc and the valve body to prevent the fluid from passing through. When the valve disc rotates to the side, the valve opens and the fluid can pass through smoothly. At present, pendulum valves have been applied in various industrial fields, such as petrochemical, electric power, metallurgy, etc.

[0003] The utility model patent with the patent number 202210903134.9 discloses a vacuum pendulum valve, which includes a valve body. A valve port for fluid passage is provided on the valve body, and a swing arm is arranged inside the valve body; one end of the swing arm is rotatably connected to a main shaft, and the main shaft is rotatably arranged on the valve body; the swing arm is movably connected to a valve plate through an elastic connection structure, and the elastic connection structure enables the valve plate to have an elastic force approaching the swing arm; a fixed wheel support is provided on the valve plate, and a plurality of fixed wheels are provided on the fixed wheel support; a movable wheel support, a pushing block and a rotating block are arranged in the swing arm. One end of the rotating block is fixedly connected to the main shaft, the other end of the rotating block is hinged to one end of the pushing block, the other end of the pushing block is hinged to one end of the movable wheel support, and a plurality of movable wheels are provided on the movable wheel support; a limiting block is arranged at the valve closing position inside the valve body, and the limiting block is used to limit the swinging position of the swing arm in the valve closing state. In this vacuum pendulum valve, the valve core makes the valve plate perform a pendulum-like movement through the rotational movement of a single swing arm, and the opening and closing functions are realized through the cooperation of the movable wheel group on the swing arm and the fixed wheel group on the valve plate. However, during the swinging process of the valve plate, the second sealing ring will be subjected to greater extrusion, which easily causes damage to the second sealing ring and then failure. Summary of the Utility Model

[0004] In view of the deficiencies or problems existing in the prior art, the present disclosure provides a pendulum valve, which can effectively relieve the extrusion on the sealing member, so that the sealing member has a longer service life.

[0005] The technical solution adopted by the present disclosure to solve the above technical problems is as follows: A pendulum valve includes a valve body and a valve disc. A valve port is provided on the valve body. The valve body is connected with a driving mechanism, and the driving mechanism is connected with a connecting rod assembly. The driving mechanism drives the connecting rod assembly to swing, and the swing of the connecting rod assembly drives the swing of the valve disc. The swing of the valve disc opens or closes the valve port; A valve piece and a plurality of balls are arranged on the valve disc. A sealing member is arranged on one side of the valve piece close to the valve port, and a concave portion is arranged on the valve piece, and the position of the concave portion corresponds to the balls.

[0006] As a preferred embodiment, the valve disc includes an outer disc and an inner disc. The inner disc is disposed inside the outer disc. The valve sheet includes a first valve sheet and a second valve sheet. The first valve sheet and the second valve sheet are respectively disposed on both sides of the inner disc. The ball is disposed on the inner disc.

[0007] As a preferred embodiment, the recessed portion includes a plurality of recessed structures. The plurality of recessed structures are connected end to end to form a circle. The swinging of the link assembly drives the inner disc to rotate. The ball rotates along with the inner disc. The recessed portion is located on the rotation trajectory of the ball.

[0008] As a preferred embodiment, the recessed structure includes a first inner concave and two second inner concaves. The two second inner concaves are disposed on both sides of the first inner concave. The second inner concave includes a small-diameter end and a large-diameter end. The large-diameter end is connected to the first inner concave. The diameter of the first inner concave is greater than or equal to the diameter of the large-diameter end. The depth of the first inner concave is greater than the depth of the second inner concave.

[0009] As a preferred embodiment, the driving mechanism includes an active driving member and a passive driving member. The active driving member drives the passive driving member to rotate. The passive driving member is connected to the link assembly.

[0010] As a preferred embodiment, the active driving member is a motor or an oil cylinder or a cylinder. The passive driving member is a gear assembly.

[0011] As a preferred embodiment, the link assembly includes a first rod body and a second rod body. One end of the first rod body is connected to the passive driving member. The other end of the first rod body is connected to the second rod body. A first mounting hole is provided at the other end of the second rod body. A columnar mounting convex block is provided on the inner disc. The first mounting hole is matched with the columnar mounting convex block to connect the second rod body and the inner disc.

[0012] As a preferred embodiment, two limiting columns are provided on the outer disc. The limiting columns are used to limit the first valve sheet and the second valve sheet.

[0013] As a preferred embodiment, a first annular member is provided at the connection of the first rod body and the second rod body. The first annular member is an eccentric structure. The setting that the first annular member is an eccentric structure enables the link assembly to have a larger swinging range without increasing the volume of the outer disc.

[0014] As a preferred embodiment, one end of the second rod body is provided with a third mounting hole, the other end of the second rod body is provided with a first mounting hole, a columnar mounting protrusion is arranged on the inner disc, and the first mounting hole is matched with the columnar mounting protrusion to connect the second rod body and the inner disc; one end of the first rod body is provided with a second mounting hole, the second mounting hole is connected with the passive driving member, the other end of the first rod body is provided with a circular mounting protrusion, and after the first rod body and the second rod body are connected, the mounting protrusion is located in the third mounting hole; the distance from the center of the second mounting hole to the center of the mounting protrusion is D1, the distance from the center of the first mounting hole to the center of the third mounting hole is D2, and D1:D2 is greater than 1:2 and less than 1:3.

[0015] As a preferred embodiment, D1:D2 is equal to 1:2.15.

[0016] As a preferred embodiment, the valve body is connected with a housing, and when the valve port is in an open state, at least part of the valve disc is located in the housing.

[0017] Compared with the existing products, since a recessed part is arranged on the valve piece, the position of the recessed part corresponds to the ball, and when the ball rotates along with the inner disc, the ball enters the recessed part. In this way, the distance between the valve port and the valve piece can be increased, the seal is prevented from being squeezed, and the failure of the seal caused by being squeezed is effectively prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application will be further described in detail below in conjunction with the drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 is one of the structural schematic diagrams of a pendulum valve according to the present disclosure;

[0020] Figure 2 is another structural schematic diagram of a pendulum valve according to the present disclosure;

[0021] Figure 3 is the third structural schematic diagram of a pendulum valve according to the present disclosure;

[0022] Figure 4 is the fourth structural schematic diagram of a pendulum valve according to the present disclosure;

[0023] Figure 5 is the exploded view of the connecting rod assembly according to the present disclosure;

[0024] Figure 6 is the cross-sectional view of a pendulum valve according to the present disclosure;

[0025] Figure 7 is a partial enlarged view of location A in the present disclosure; Figure 6 in the present disclosure;

[0026] Figure 8 is a schematic structural view of the second valve plate of the present disclosure;

[0027] Figure 9 is the present disclosure Figure 8 is a partial enlarged view of location B in the present disclosure;

[0028] Figure 10 is a schematic structural view of the inner disc of the present disclosure;

[0029] Figure 11 is a schematic structural view of the first rod body of the present disclosure.

[0030] Explanation of reference numerals:

[0031] 1. Valve body; 2. Housing; 4. Valve port; 5. Link assembly; 6. Active drive member; 7. Passive drive member; 8. Outer disc; 9. Inner disc; 10. First valve plate; 11. Ball; 12. Limit post; 13. First rod body; 14. Second rod body; 15. Protrusion structure; 16. Columnar mounting protrusion; 17. First annular member; 18. Second valve plate; 19. First annular concave; 20. Second annular concave; 21. Depression; 22. Second inner concave; 23. First inner concave; 24. First mounting hole; 25. Second mounting hole; 26. Third mounting hole; 27. Mounting protrusion. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0033] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0034] Please refer to Figures 1 to 3 and Figure 8As shown, an embodiment of the present disclosure discloses a pendulum valve, which includes a valve body 1 and a valve disc. A valve port 4 is provided on the valve body 1. The valve body 1 is connected to a driving mechanism, and the driving mechanism is connected to a connecting rod assembly 5. The driving mechanism drives the connecting rod assembly 5 to swing, and the swing of the connecting rod assembly 5 drives the swing of the valve disc. The swing of the valve disc opens or closes the valve port 4. A valve piece and a plurality of balls 11 are provided on the valve disc. A seal is provided on one side of the valve piece close to the valve port 4. A recess 21 is provided on the valve piece, and the position of the recess 21 corresponds to that of the balls 11. When the balls 11 rotate with the inner disc 9, the balls 11 enter the recess 21. In this way, the distance between the valve port 4 and the valve piece can be increased, and the seal is prevented from being squeezed. The driving mechanism includes a main driving member 6 and a driven driving member 7. The main driving member 6 drives the driven driving member 7 to rotate, and the driven driving member 7 is connected to the connecting rod assembly 5. The main driving mechanism is a cylinder, and the driven driving member 7 is a gear assembly. The gear assembly includes a gear and a rotating shaft. A toothed section (similar to the structure of a rack) is provided on the piston rod of the cylinder. With the reciprocating movement of the cylinder, the toothed section cooperates with the gear, thereby driving the rotation of the gear. The rotating shaft is provided below the gear, and the rotating shaft rotates synchronously with the gear. The rotating shaft is connected to the connecting rod assembly 5. The rotation of the rotating shaft drives the swing of the connecting rod assembly 5, and the swing of the connecting rod assembly 5 drives the swing of the valve disc, so that the valve disc moves away from or enters the valve port 4, thereby opening or closing the valve port 4. Preferably, a first through hole is provided on the valve body 1, and at least part of the gear assembly is arranged in the first through hole, so that the gear assembly is connected to the valve body 1. The present disclosure uses the connecting rod assembly 5 to connect the driving mechanism and the valve disc, and drives the valve disc to move away from or enter the valve port 4 through the connecting rod assembly 5. The structure of the connecting rod assembly 5 is simple, occupies a small volume, and works reliably.

[0035] Please refer to Figure 6 and Figure 7As shown, further, the valve disc includes an outer disc 8 and an inner disc 9. The inner disc 9 is arranged inside the outer disc 8. The valve plate is a circular sheet structure. The valve plate includes a first valve plate 10 and a second valve plate 18. The first valve plate 10 and the second valve plate 18 are respectively arranged on both sides of the inner disc 9. The ball 11 is arranged on the inner disc 9. Specifically, the inner disc 9 is generally in a ring structure. A number of receiving grooves are arranged on both sides of the inner disc 9. Each receiving groove is equidistantly arranged around the ring structure for one week. The ball 11 is located in the receiving groove. The first valve plate 10 and the second valve plate 18 are connected together by bolts. The ball 11 is a steel ball. The first valve plate 10 is provided with a first annular concave 19, and the second valve plate 18 is provided with a second annular concave 20. The seal includes a first seal ring and a second seal ring. The first seal ring is arranged in the first annular concave 19. The first seal ring has elasticity, and the height of the first seal ring is greater than the depth of the first annular concave 19. The second seal ring is arranged in the second annular concave 20. The second seal ring has elasticity, and the height of the second seal ring is greater than the depth of the second annular concave 20. The first seal ring and the second seal ring are used to enhance the sealing performance between the first valve plate 10 and the second valve plate 18 and the valve port 4, so as to realize the vacuum seal between the valve plate and the valve port 4.

[0036] Please continue to refer to Figure 8 and Figure 9As shown, further, the recessed portion 21 includes a plurality of recessed structures, and the plurality of recessed structures are connected end to end to form a circle. The swing of the connecting rod assembly 5 drives the inner disc 9 to rotate, and the ball 11 rotates along with the inner disc 9. The recessed portion 21 is located on the rotation trajectory of the ball 11. Preferably, the recessed structure includes a first inner recess 23 and two second inner recesses 22. The two second inner recesses 22 are arranged on both sides of the first inner recess 23. The second inner recess 22 includes a small-diameter end and a large-diameter end. The large-diameter end is connected to the first inner recess 23. The diameter of the first inner recess 23 is greater than or equal to the diameter of the large-diameter end. The radius of the ball 11 is greater than the depth of the first inner recess 23, and the depth of the first inner recess 23 is greater than the depth of the second inner recess 22. When the valve plate seals with the valve port 4, the inner disc 9 and the outer disc 8 are located at the valve port 4, and the ball 11 is located in the second inner recess 22. The depth of the second inner recess 22 is relatively shallow. The ball 11 pushes the first valve plate 10 and the second valve plate 18 towards the valve port 4 respectively, so that the first sealing ring and the second sealing ring are closely attached to the valve port 4. At this time, both the first sealing ring and the second sealing ring are subjected to greater extrusion. When it is necessary to open the valve port 4, the connecting rod assembly 5 moves in the opposite direction, driving the inner disc 9, the outer disc 8 and the valve plate to rotate away from the valve port 4. In the prior art, when the inner disc 9, the outer disc 8 and the valve plate rotate, the first sealing ring and the second sealing ring are always in a squeezed state. In the present disclosure, due to the provision of the recessed portion 21, when the inner disc 9, the outer disc 8 and the valve plate rotate, the ball 11 on the inner disc 9 will rotate into the second inner recess 22. Since the depth of the second inner recess 22 is relatively deep, both the first valve plate 10 and the second valve plate 18 move away from the valve port 4, resulting in a certain gap between the first valve plate 10, the second valve plate 18 and the valve port 4. In this way, the degree of extrusion of the first sealing ring and the second sealing ring is greatly reduced, and thus the wear of the first sealing ring and the second sealing ring can be reduced, and the excessive wear and failure thereof can be avoided.

[0037] Please refer to Figures 3 to 5 , Figure 11As shown, the connecting rod assembly 5 includes a first rod body 13 and a second rod body 14. One end of the first rod body 13 is connected to the passive driving member 7, the other end of the first rod body 13 is connected to the second rod body 14, and a first mounting hole 24 is provided at the other end of the second rod body 14. A columnar mounting protrusion 16 is provided on the inner disk 9, and the first mounting hole 24 is matched with the columnar mounting protrusion 16 to connect the second rod body 14 and the inner disk 9. Specifically, a second mounting hole 25 is provided at one end of the first rod body 13, the second mounting hole 25 is connected to the passive driving member 7, a circular mounting protrusion 27 is provided at the other end of the first rod body 13, and a third mounting hole 26 is provided at one end of the second rod body 14. After the first rod body 13 and the second rod body 14 are connected, the mounting protrusion 27 is located in the third mounting hole 26. The distance from the center of the second mounting hole 25 to the center of the mounting protrusion 27 is D1, and the distance from the center of the first mounting hole 24 to the center of the third mounting hole 26 is D2. D1:D2 is equal to 1:2.15. Such a setting makes the connecting rod assembly 5 more labor-saving when swinging. Preferably, the third mounting hole 26 is of an annular structure, and an opening is provided on the annular structure. The "center of the third mounting hole 26" mentioned above refers to the center of the third mounting hole 26 in the closed state (i.e., when the opening is provided). A first annular member 17 is provided at the connection between the first rod body 13 and the second rod body 14, and the first annular member 17 is located in the third mounting hole 26. The opening of the third mounting hole 26 is provided to accommodate first annular members 17 of different sizes. The first annular member 17 is of an eccentric structure. The setting of the first annular member 17 being of an eccentric structure enables the connecting rod assembly 5 to have a larger swinging range without increasing the volume of the outer disk 8. Two limiting posts 12 are provided on the outer disk 8, and the limiting posts 12 limit the first valve plate 10 and the second valve plate 18 to prevent them from rotating.

[0038] In an embodiment of the present disclosure, the valve body 1 is connected to a housing 2. When the valve port 4 is in the open state, at least part of the valve disk is located in the housing 2. When the valve port 4 is fully open, the valve disk is completely located in the housing 2. The housing 2 is provided to protect the valve disk.

[0039] Please refer to Figures 1 to 2 and Figure 10As shown, in an embodiment of the present disclosure, the inner disk 9 is made of metal, and the outer disk 8 is made of metal. A number of concave structures are provided on the outer disk 8, and a number of convex structures 15 are provided at the edge of the inner disk 9. The number of concave structures is the same as that of the convex structures 15. The concave edges of the concave structures extend circumferentially. The convex structures 15 are exactly adapted to the concave structures. After the concave structures and the convex structures 15 cooperate, they play a guiding role in the movement of the inner disk 9. When the inner disk 9 rotates to the position where the ball 11 enters the first concave 23, the distance between the two valve plates is the smallest. At this time, there is a gap between the seal on the valve plate and the sealing surface of the valve port. When the inner disk 9 rotates to the position where the ball 11 enters the second concave 22, the distance between the two valve plates becomes larger. At this time, the seal on the valve plate is pressed by the valve plate onto the sealing surface of the valve port to achieve sealing. It should be noted that when the valve is opened, the valve disk needs to leave the valve port 4. Under the action of the main driving member 6, the link assembly 5 and the gear assembly, the inner disk 9 rotates first. After the ball 11 enters from the second concave 22 into the first concave 23, at this time, the distance between the two valve plates becomes smaller, and the seal is disengaged from the sealing surface of the valve port. As the link assembly 5 and the gear assembly continue to work, the valve disk starts to rotate around the rotating shaft until the valve port 4 is completely opened. When the valve is closed, under the action of the main driving member 6, the link assembly 5 and the gear assembly, the valve disk rotates first until the valve disk rotates to the closed valve position. At this time, the valve disk stops moving, and the link assembly 5 continues to drive the rotation of the inner disk 9. The ball 11 enters from the first concave 23 into the second concave 22. At this time, the distance between the two valve plates becomes larger, so that the valve plate presses the seal tightly on the sealing surface of the valve port 4 to achieve sealing.

[0040] The above has introduced the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the present application and its core idea. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A pendulum valve, characterized in that: The invention comprises a valve body (1) and a valve disc, wherein the valve body (1) is provided with a valve port (4), the valve body (1) is connected to a driving mechanism, the driving mechanism is connected to a connecting rod assembly (5), the driving mechanism drives the connecting rod assembly (5) to swing, the swing of the connecting rod assembly (5) drives the swing of the valve disc, and the swing of the valve disc opens or closes the valve port (4); a valve plate and a plurality of balls (11) are provided on the valve disc, a sealing member is provided on a side of the valve plate close to the valve port (4), a recessed portion (21) is provided on the valve plate, and the position of the recessed portion (21) corresponds to the position of the ball (11).

2. The pendulum valve according to claim 1, characterized in that: The valve disc comprises an outer disc (8) and an inner disc (9), wherein the inner disc (9) is arranged inside the outer disc (8), the valve plate comprises a first valve plate (10) and a second valve plate (18), wherein the first valve plate (10) and the second valve plate (18) are respectively arranged on two sides of the inner disc (9), and the ball (11) is arranged on the inner disc (9).

3. The pendulum valve according to claim 2, characterized in that: The recessed portion (21) includes a plurality of recessed structures, which are connected end to end to form a circle. The swing of the connecting rod assembly (5) drives the inner disk (9) to rotate, and the ball (11) rotates along with the inner disk (9). The recessed portion (21) is located on the rotation trajectory of the ball (11).

4. The pendulum valve according to claim 3, characterized in that: The recessed structure comprises a first recess (23) and two second recesses (22), the two second recesses (22) being arranged on both sides of the first recess (23), the second recess (22) comprising a small-diameter end and a large-diameter end, the large-diameter end being connected to the first recess (23), the diameter of the first recess (23) being greater than or equal to the diameter of the large-diameter end, and the depth of the first recess (23) being greater than the depth of the second recess (22).

5. The pendulum valve according to claim 2, characterized in that: The driving mechanism comprises an active driving member (6) and a passive driving member (7), wherein the active driving member (6) drives the passive driving member (7) to rotate, and the passive driving member (7) is connected to the connecting rod assembly (5).

6. The pendulum valve according to claim 5, characterized in that: The connecting rod assembly (5) comprises a first rod body (13) and a second rod body (14); one end of the first rod body (13) is connected to the passive driving member (7); the other end of the first rod body (13) is connected to the second rod body (14); the other end of the second rod body (14) is provided with a first mounting hole; a columnar mounting protrusion (16) is provided on the inner plate (9); the first mounting hole cooperates with the columnar mounting protrusion (16) to connect the second rod body (14) to the inner plate (9).

7. The pendulum valve according to claim 6, characterized in that: Two limiting posts (12) are arranged on the outer disk (8), and the limiting posts (12) are used to limit the first valve plate (10) and the second valve plate (18).

8. The pendulum valve according to claim 6, characterized in that: A first annular component (17) is provided at the connection between the first rod body (13) and the second rod body (14), and the first annular component (17) is an eccentric structure.

9. The pendulum valve according to claim 6, characterized in that: A third mounting hole (26) is provided at one end of the second rod body (14), a first mounting hole (24) is provided at the other end of the second rod body (14), a columnar mounting protrusion (16) is provided on the inner plate (9), the first mounting hole (24) cooperates with the columnar mounting protrusion (16) to connect the second rod body (14) and the inner plate (9); a second mounting hole (25) is provided at one end of the first rod body (13), the second mounting hole (25) is connected to the passive driving member ( 7) connection, the other end of the first rod body (13) is provided with a circular mounting protrusion (27), after the first rod body (13) is connected to the second rod body (14), the mounting protrusion (27) is located in the third mounting hole (26); the distance from the center of the second mounting hole (25) to the center of the mounting protrusion (27) is D1, the distance from the center of the first mounting hole (24) to the center of the third mounting hole (26) is D2, and D1:D2 is greater than 1:2 and less than 1:

3.

10. The pendulum valve according to claim 9, characterized in that: D1:D2 equals 1:2.15.

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