Double-sided gate plate and gate valve

Abstract

The double-faced flashboard comprises a first flashboard body, a second flashboard body, an elastic piece and a valve rod, the first flashboard body and the second flashboard body are symmetrically arranged, and the first flashboard body and the second flashboard body are connected through a connecting buckle. The connecting buckle is composed of a first buckle piece arranged on the first gate plate and a second buckle piece arranged on the second gate plate, the first buckle piece and the second buckle piece are mutually embedded through a clamping block and a clamping groove, a first movable gap is formed between the clamping block and the clamping groove, a connecting piece is arranged on the valve rod, and the valve rod penetrates through a through hole in the connecting buckle through the connecting piece. A second movable gap is formed between the connecting piece and the through hole, so that after the elastic piece applies elastic force, the first gate plate and the second gate plate generate relative displacement in the first movable gap and the second movable gap when being pressed; the displacement movement can effectively compensate the problem that the sealing surface of the flashboard deviates from the original size due to angle, compression deformation, abrasion and the like, and the sealing effect is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and more specifically, to a double-sided gate and gate valve. Background Technology

[0002] Gate valves belong to the category of shut-off valves, and their function is to connect or disconnect the medium in a pipeline. They mainly have two working states: fully closed or fully open. Double-gate valves are suitable for use as closed-loop devices in pipelines carrying water or sewage, and are not permitted for flow regulation or venting. Currently, double-gate valves include wedge double-gate and parallel double-gate valves, among others.

[0003] The sealing surface of existing wedge-type double gate seals undergoes pressure deformation and wear during use, causing it to deviate from its original dimensions. Since the gate cannot effectively compensate for these dimensional changes in the sealing surface, poor sealing performance occurs, and the sealing surface may even lose its functionality.

[0004] A search revealed Chinese patent application No. 201610552913.3, which discloses a parallel double-gate valve with a bidirectional self-relief structure in the central cavity. The gate has a boss with a stepped through-hole inside. The stepped through-hole contains a pressure relief system consisting of a movable core, a pressure adjusting block, an elastic element, an elastic element fixing seat, and a ball. The movable core has a bent through-hole, and the pressure adjusting block, elastic element, elastic element fixing seat, and ball are sequentially placed within the bent through-hole. A sealing surface I is provided at the contact point between the bent through-hole and the ball. A sealing surface II is also provided on the outside of the movable core. A sealing surface III, corresponding to sealing surface II, is provided within the stepped through-hole. The movable core includes a left movable core and a right movable core, which are movably connected by a connecting structure. This parallel double-gate valve can meet the pressure relief requirement of the central cavity. However, in this design, when the pressure in the central cavity of the parallel double-gate valve increases, there is no displacement gap between the two gates, which can still lead to poor sealing performance after the two gates undergo pressure deformation or wear. Summary of the Invention

[0005] This invention provides a double-sided gate and gate valve, which solves the problem of poor sealing effect of existing double-sided gates.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A double-sided gate, comprising:

[0008] A first gate and a second gate are symmetrically arranged. The first gate and the second gate are connected by one or more pairs of connecting buckles. Any pair of connecting buckles consists of a first fastener on the first gate and a second fastener on the second gate. The first fastener and the second fastener are engaged with each other by a locking block and a locking groove. A first movable gap is provided between the locking block and the locking groove.

[0009] An elastic element is connected between the first gate and the second gate, and is used to apply an elastic force to drive the first gate and the second gate away from each other;

[0010] A valve stem is provided with a connector, and the valve stem passes through a pair of through holes on the connecting buckles through the connector. A second movable gap is provided between the connector and the through holes. The connector also has a limiting part that restricts the first buckle and the second buckle from separating from each other along the axial direction of the valve stem.

[0011] As a further improvement of this utility model, the locking block is provided on the first fastener and / or the second fastener, and the locking groove is provided on the first fastener and / or the second fastener.

[0012] As a further improvement of this utility model, multiple pairs of connecting buckles are arranged in a ring array between the first gate and the second gate.

[0013] As a further improvement of this utility model, the slot is arc-shaped, and the card block has an arc surface concentric with the slot;

[0014] The first fastener and the second fastener are rotated and engaged by the locking block and the locking slot.

[0015] As a further improvement of this utility model, the through hole is formed by the vertical connection between the first waist-shaped hole provided on the first fastener and the second waist-shaped hole provided on the second fastener.

[0016] As a further improvement of this utility model, the through hole is formed by the combination of a first notch on the first fastener and a second notch on the second fastener, and the through hole is an oblong hole.

[0017] As a further improvement of this utility model, the connecting member is a nut assembly installed on the connecting buckle, and the valve stem is threadedly engaged with the nut assembly.

[0018] As a further improvement of this utility model, the nut assembly includes a first nut and a second nut. The first nut has a cylindrical body and a polygonal boss provided in the circumference of the cylindrical body. The cylindrical body is provided with a threaded through hole along its axial direction that engages with the valve stem thread.

[0019] The connecting buckle is provided with a positioning groove that mates with the polygonal boss to restrict the rotation of the first nut. The second nut is threaded to one end of the cylindrical body of the first nut, clamping the connecting buckle between the second nut and the polygonal boss. The limiting part of the connecting member is formed by the polygonal boss and the second nut.

[0020] As a further improvement of this utility model, the connecting member includes a locking nut and a flange fixedly connected to one end of the valve stem. The locking nut is threaded onto the valve stem and clamps the connecting buckle between the locking nut and the flange. The limiting part of the connecting member is formed by the locking nut and the flange.

[0021] A gate valve comprising a double-sided gate as described above.

[0022] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0023] (1) A double-sided gate of the present invention, wherein the first gate and the second gate are connected by one or more pairs of connecting buckles. The connecting buckle consists of a first fastener on the first gate and a second fastener on the second gate. Thus, the first gate and the second gate are connected by the connecting buckle, thereby movably connecting the two independent gate pieces. This allows the gate sealing surface to be processed without special tooling, and the processing size and processing accuracy of the gate sealing surface can be guaranteed by processing the end plane alone, effectively reducing the processing and manufacturing cost and difficulty.

[0024] (2) In a double-sided gate of this utility model, the first fastener and the second fastener are fitted together by a locking block and a locking groove, and a first movable gap is provided between the locking block and the locking groove. Thus, under the elastic tension of the elastic element, the first gate and the second gate will be compressed and will generate left and right relative displacement through the first movable gap and the second movable gap. This displacement can effectively compensate for the gate sealing surface deviating from its original size due to angle, pressure deformation, wear, etc., thereby maintaining the best sealing performance.

[0025] (3) A double-sided gate of this utility model is provided with a connector on the valve stem. The valve stem passes through a pair of through holes on the connector. A second movable gap is provided between the connector and the through hole. When the first gate and the second gate are closed under the drive of the valve stem, the first gate and the second gate will have a left-right relative displacement. This displacement can compensate for the problem that the sealing surface of the first gate and the sealing surface of the second gate deviate from their original size due to angle, pressure deformation, wear of the sealing surface, etc., so as to maintain the best sealing performance effect.

[0026] (4) A double-sided gate of this utility model has a limiting part on the valve stem to restrict the separation of the first fastener and the second fastener along the valve stem axis. Thus, by setting the limiting part, the problem of the fasteners separating from each other during operation is effectively avoided, and the integrity of the double-sided gate connection is guaranteed. Attached Figure Description

[0027] Figure 1 This is a perspective view of the double-sided gate plate according to an embodiment of the present utility model;

[0028] Figure 2 This is a front view of the double-sided gate according to an embodiment of the present utility model;

[0029] Figure 3 This is a top view of the double-sided gate plate according to an embodiment of the present utility model;

[0030] Figure 4 This is a structural diagram of the first gate plate according to an embodiment of the present utility model;

[0031] Figure 5 This is a structural diagram of the second gate plate in an embodiment of the present utility model.

[0032] The labels in the diagram are as follows: 1. First gate; 11. First fastener; 12. Locking block; 2. Second gate; 21. Second fastener; 22. Locking groove; 3. First movable clearance; 4. Elastic element; 41. First pressure spring; 42. Second pressure spring; 5. Valve stem; 6. Through hole; 7. Nut assembly; 71. First nut; 72. Second nut. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] like Figure 1 The image shows a double-sided gate provided in this embodiment. It should be noted that the double-sided gate provided in this embodiment is a wedge-type double-sided metal-sealed gate, used to connect or disconnect the medium in a pipeline. When the double-sided gate is in the open state, it is used to connect the medium in the pipeline; when the double-sided gate is in the closed state, it is used to disconnect the medium in the pipeline.

[0040] In this embodiment, the double-sided gate includes a first gate 1, a second gate 2, an elastic element 4, and a valve stem 5.

[0041] Specifically, in this embodiment, the first gate 1 and the second gate 2 are symmetrically arranged, and the first gate 1 and the second gate 2 are connected by one or more pairs of connecting buckles. It should be noted that in this embodiment, any pair of connecting buckles consists of a first fastener 11 provided on the first gate 1 and a second fastener 21 provided on the second gate 2. For example... Figure 2 As shown, the first fastener 11 and the second fastener 21 are engaged with each other via a locking block 12 and a locking groove 22. In this embodiment, the locking block 12 is provided on the first fastener 11 and / or the second fastener 21, and the locking groove 22 is provided on the first fastener 11 and / or the second fastener 21. The locking groove 22 is arc-shaped, and the locking block 12 has an arc surface concentric with the locking groove 22. The first fastener 11 and the second fastener 21 are rotated and engaged via the locking block 12 and the locking groove 22 to form a connecting buckle. Thus, in this embodiment, by setting the locking groove 22 to be arc-shaped and the locking block 12 to be an arc surface, the locking block 12 and the locking groove 22 can be rotated and engaged, facilitating the installation of the first gate 1 and the second gate 2.

[0042] Furthermore, multiple pairs of connecting buckles are arranged in a circular array between the first gate plate 1 and the second gate plate 2. It should be noted that, in this embodiment, the multiple pairs of connecting buckles are arranged in a circular array with the center of the first gate plate 1 and the second gate plate 2 as the center. Thus, by connecting the first gate plate 1 and the second gate plate 2 through multiple pairs of connecting buckles, the two independently separate first gate plate 1 and the second gate plate 2 are movably connected. This allows for the machining of the sealing surfaces of the first gate plate 1 and the second gate plate 2 without the need for special tooling; the machining of the end faces alone can ensure the machining dimensions and accuracy of the sealing surfaces of the first gate plate 1 and the second gate plate 2, effectively reducing manufacturing costs and difficulty.

[0043] It is worth noting that in this embodiment, the size of the locking block 12 is smaller than the size of the slot 22, thus forming a first movable gap 3 between the locking block 12 and the slot 22, allowing the locking block 12 to move within the slot 22 along the elastic force direction of the elastic member 4. In this embodiment, under the elastic tension of the elastic member 4, the first gate 1 and the second gate 2 will be compressed and will generate a relative displacement to the left and right through the first movable gap 3. This displacement can effectively compensate for the deviation of the sealing surfaces of the first gate 1 and the second gate 2 from their original dimensions due to angle, pressure deformation, wear, etc., maintaining the best sealing performance.

[0044] like Figure 3As shown, the elastic element 4 is connected between the first gate 1 and the second gate 2, and is used to apply a spring force that drives the first gate 1 and the second gate 2 away from each other. In this embodiment, the elastic element 4 is a first pressure spring 41 and a second pressure spring 42. Specifically, a spring positioning groove is provided on one side of the first gate 1 and the second gate 2, and the first pressure spring 41 and the second pressure spring 42 are fixedly connected between the first gate 1 and the second gate 2 through the spring positioning groove. The first pressure spring 41 and the second pressure spring 42 are used to support the first gate 1 and the second gate 2, and also serve as an elastic power source between the first gate 1 and the second gate 2. When the first pressure spring 41 and the second pressure spring 42 apply a spring force, it will drive the first gate 1 and the second gate 2 away from each other, and then the first gate 1 and the second gate 2 will generate displacement movement through the first movable gap 3, so that the first gate 1 and the second gate 2 can move closer or further apart within a certain limit, thereby adapting to valves of different sizes.

[0045] like Figure 2 As shown, the valve stem 5 is provided with a connector, and the valve stem 5 passes through a pair of through holes 6 on the connector. It should be noted that, in this embodiment, as... Figure 4 and Figure 5 As shown, the through hole 6 can be formed by the first oblong hole on the first fastener 11 and the second oblong hole on the second fastener 21 communicating vertically. In this embodiment, the through hole 6 can also be formed by the first notch on the first fastener 11 and the second notch on the second fastener 21 enclosing each other. In this case, the through hole 6 is an oblong hole.

[0046] In this embodiment, the connector includes a nut assembly 7 mounted on the connector buckle. Specifically, the nut assembly 7 includes a first nut 71 and a second nut 72. The first nut 71 has a cylindrical body and a polygonal boss located circumferentially on the cylindrical body. The cylindrical body has a threaded through hole along its axial direction for threaded engagement with the valve stem 5. The valve stem 5 is threadedly engaged with the nut assembly 7. In this embodiment, the valve stem 5 drives the first gate 1 and the second gate 2 to move up and down together via the connector.

[0047] It is worth noting that in this embodiment, after the through hole 6 is set as an oblong hole, a second movable gap is formed between the connector and the through hole 6. The second movable gap is the gap between the inner wall of the through hole 6 and the circumferential gap of the nut assembly 7. Thus, when the first gate 1 and the second gate 2 are closed under the drive of the valve stem 5, the first gate 1 and the second gate 2 will generate a left-right relative displacement within the second movable gap. This displacement can compensate for the problem that the sealing surfaces of the first gate 1 and the second gate 2 deviate from their original dimensions due to angle, pressure deformation, wear of the sealing surfaces, etc., thereby always maintaining the best sealing performance.

[0048] In this embodiment, the connector also has a limiting part that restricts the separation of the first fastener 11 and the second fastener 21 along the axial direction of the valve stem 5. The connector has a positioning groove that mates with the polygonal boss to restrict the rotation of the first nut 71. The second nut 72 is threaded to one end of the cylindrical body of the first nut 71, clamping the connector between the second nut 72 and the polygonal boss. The limiting part of the connector is formed by the polygonal boss and the second nut 72.

[0049] In this embodiment, another implementation of the connector is that the connector includes a lock nut and a flange fixedly connected to one end of the valve stem 5. The lock nut is threaded onto the valve stem 5, clamping the connector between the lock nut and the flange. The limiting portion of the connector is formed by the lock nut and the flange.

[0050] Therefore, by setting limiting parts at both ends of the connector, the separation of the first fastener 11 and the second fastener 21 during operation is effectively prevented, ensuring the integrity of the connection between the first gate 1 and the second gate 2.

[0051] This embodiment also provides a gate valve, which includes the double-sided gate described above.

[0052] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A double-sided gate, characterized in that, include: A first gate (1) and a second gate (2) are symmetrically arranged. The first gate (1) and the second gate (2) are connected by one or more pairs of connecting buckles. Any pair of connecting buckles consists of a first fastener (11) on the first gate (1) and a second fastener (21) on the second gate (2). The first fastener (11) and the second fastener (21) are engaged with each other by a locking block (12) and a locking groove (22). A first movable gap (3) is provided between the locking block (12) and the locking groove (22). An elastic element (4) is connected between the first gate (1) and the second gate (2) and is used to apply an elastic force to drive the first gate (1) and the second gate (2) away from each other; A valve stem (5) is provided with a connector. The valve stem (5) passes through a pair of through holes (6) on the connecting buckles through the connector. A second movable gap is provided between the connector and the through holes (6). The connector also has a limiting part that restricts the first buckle (11) and the second buckle (21) from separating from each other along the axial direction of the valve stem (5).

2. A double-sided gate according to claim 1, characterized in that, The locking block (12) is provided on the first fastener (11) and / or the second fastener (21), and the locking slot (22) is provided on the first fastener (11) and / or the second fastener (21).

3. A double-sided gate according to claim 1, characterized in that, Multiple pairs of the connecting buckles are arranged in a ring array between the first gate (1) and the second gate (2).

4. A double-sided gate according to claim 3, characterized in that, The slot (22) is arc-shaped, and the block (12) has an arc surface concentric with the slot (22); The first fastener (11) and the second fastener (21) are rotatably engaged by the locking block (12) and the locking groove (22).

5. A double-sided gate according to claim 1, characterized in that, The through hole (6) is formed by the first waist-shaped hole provided on the first fastener (11) and the second waist-shaped hole provided on the second fastener (21) communicating vertically.

6. A double-sided gate according to claim 1, characterized in that, The through hole (6) is formed by the first notch on the first fastener (11) and the second notch on the second fastener (21), and the through hole (6) is an oblong hole.

7. A double-sided gate according to claim 1, characterized in that, The connector is a nut assembly (7) installed on the connector buckle, and the valve stem (5) is threadedly engaged with the nut assembly (7).

8. A double-sided gate according to claim 7, characterized in that, The nut assembly (7) includes a first nut (71) and a second nut (72). The first nut (71) has a cylindrical body and a polygonal boss located around the cylindrical body. The cylindrical body has a threaded through hole along its axial direction that is threaded to engage with the valve stem (5). The connecting buckle is provided with a positioning groove that cooperates with the polygonal boss to restrict the rotation of the first nut (71). The second nut (72) is threaded to one end of the cylindrical body of the first nut (71) to clamp the connecting buckle between the second nut (72) and the polygonal boss. The limiting part of the connecting member is formed by the polygonal boss and the second nut (72).

9. A double-sided gate according to claim 1, characterized in that, The connector includes a locking nut and a flange fixedly connected to one end of the valve stem (5). The locking nut is threaded onto the valve stem (5) and clamps the connector between the locking nut and the flange. The limiting part of the connector is formed by the locking nut and the flange.

10. A gate valve, characterized in that, Includes the double-sided gate as described in any one of claims 1-9.

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