Novel sealing gate valve

Abstract

The utility model discloses a novel sealing gate valve, and belongs to the technical field of valves. The gate valve comprises a valve cover and a valve body, the valve cover covers the valve body, a gate plate mechanism is arranged in the valve body and comprises a first gate plate and a second gate plate, the first gate plate and the second gate plate are connected through an elastic piece, and the elastic piece is used for applying force away from the elastic piece to the first gate plate and the second gate plate; the first flashboard and the second flashboard are provided with a first fastener and a second fastener respectively, the buckle of the first fastener is inserted into the clamping groove of the second fastener, and the buckle can move in the clamping groove in the elastic force direction of the elastic piece. The elastic piece is arranged between the two flashboards to connect the two flashboards, the elastic piece exerts force far away from the elastic piece on the two flashboards, when the flashboards move downwards to close the valve, friction force borne between the flashboards and the valve seat is only elastic tension of the elastic piece, the friction force is small, and therefore abrasion of sealing faces of the flashboards is effectively reduced, and the service life of the flashboards is prolonged. And the service life of the valve is prolonged.

Description

Technical Field

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

[0002] A gate valve is a valve whose opening and closing element, the gate, moves in a direction perpendicular to the direction of water flow. Its function is to cut off or connect the medium in the pipeline. It is a type of valve that is always in one of two states: closed or fully open.

[0003] The valve body sealing seat and gate sealing surfaces are typically overlaid with metal to increase wear resistance. Their structure is slanted, wider at the top and narrower at the bottom, so that the sealing surface experiences increasing force as the gate closes downwards, ensuring a tight seal. Because the sealing surfaces are overlaid with metal, the precision of the fit between the valve seat and gate sealing surfaces directly reflects the sealing performance. In actual production, manufacturing errors and equipment variations inevitably exist. To compensate for these errors, a large closing pressure must be applied to the gate until the valve seat and gate sealing surfaces undergo elastic deformation. This results in high closing torque and significant wear on the sealing surfaces, easily leading to fluid leakage.

[0004] For example, Chinese patent document CN210770345U discloses a high-temperature and high-pressure wedge-type double gate valve, including a valve body, an inlet mounting flange, an outlet mounting flange, a valve cover flange, a first valve stem, a second valve stem, a first handwheel, and a second handwheel. The valve body has an inlet mounting flange at its left end and an outlet mounting flange at its right end. The first and second valve stems are connected to the top of the valve body, with a valve cover flange located between them. The first and second valve stems have a first handwheel and a second handwheel at their tops, with dust covers at their tops and dustproof sealing plugs in the middle of the dust covers. A screw is located at the bottom of the first and second valve stems, and a wedge-type gate is located at the bottom of the screw. This application describes an existing gate valve, which suffers from high closing torque and significant wear on the sealing surface, easily leading to fluid leakage. Utility Model Content

[0005] 1. Technical problem to be solved by the utility model

[0006] This utility model addresses the shortcomings of existing technologies by providing a gate valve with an elastic double-sided gate. While ensuring a leak-proof seal between the gate and the valve seat, it achieves low closing torque and minimal wear on the sealing surface.

[0007] 2. Technical Solution

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0009] This utility model discloses a novel sealing gate valve, comprising a valve cover and a valve body. The valve cover is disposed on the valve body, and a gate mechanism is disposed within the valve body. The gate mechanism is used to seal the valve seat of the valve body. The gate mechanism includes a first gate and a second gate, which are connected by an elastic element. The elastic element applies a force away from the elastic element to the first and second gates. A first fastener and a second fastener are respectively disposed on the first and second gates. The buckle of the first fastener is inserted into the groove of the second fastener, and the buckle can move within the groove along the elastic force direction of the elastic element.

[0010] As a further improvement of this utility model, the first fastener includes a base portion, which is connected to a first gate plate or a second gate plate; the base portion extends outward to form a buckle, which, together with the base portion, forms a groove; the structure of the second fastener is the same as that of the first fastener.

[0011] As a further improvement of this utility model, the buckle of the first fastener is inserted into the slot of the second fastener, and the buckle of the second fastener is inserted into the slot of the first fastener, and both the buckles of the first fastener and the second fastener can move in the slot.

[0012] As a further improvement of this utility model, the first fastener and the second fastener are connected together to form a connecting buckle. The connecting buckle includes a first connecting buckle and a second connecting buckle. The first connecting buckle is connected to the upper end of the first gate plate and the second gate plate, and the second connecting buckle is connected to the middle or lower part of the first gate plate and the second gate plate.

[0013] As a further improvement of this utility model, a through hole is provided on the first connecting buckle, and a valve stem nut is provided in the through hole. The valve stem nut can drive the first gate plate and the second gate plate to move up and down together through the first connecting buckle.

[0014] As a further improvement of this utility model, the valve stem nut includes an upper limit part, a connecting part, and a lower limit part. The upper limit part and the lower limit part are respectively disposed at both ends of the connecting part. The first connecting buckle is disposed at the connecting part after being engaged. The upper limit part and the lower limit part are used to restrict the first connecting buckle from moving in the vertical direction.

[0015] As a further improvement of this utility model, the valve stem nut is disposed on the valve stem, and a threaded hole is provided on the valve stem nut. The valve stem is inserted into the threaded hole and threadedly connected to the valve stem nut. The valve stem nut can move along the length direction of the valve stem.

[0016] As a further improvement of this utility model, the first gate includes a plate body, and a connecting buckle and a mounting groove for installing an elastic element are provided on the side of the plate body facing the second gate.

[0017] As a further improvement of this utility model, an outwardly protruding part is provided on the other side of the first gate plate, and the protruding part forms a ring structure along the circumference of the first gate plate. The structure of the second gate plate is the same as that of the first gate plate.

[0018] As a further improvement of this utility model, a rotating wheel is provided at the end of the valve stem, and the rotating wheel is used to drive the valve stem to rotate.

[0019] 3. Beneficial effects

[0020] Compared with existing known technologies, the technical solution provided by this utility model has the following significant advantages:

[0021] (1) This utility model provides a novel sealing gate valve, in which an elastic element is provided between two gates to connect them. The elastic element applies a force away from the two gates. When the gate moves downward to close the valve, the frictional force between the gate and the valve seat is only the elastic tension of the elastic element. The frictional force is small, which effectively reduces the wear of the gate sealing surface and increases the service life of the valve. At the same time, the frictional force between the gate and the valve seat is also the torque of the handwheel rotation when closing the valve. This design of the utility model makes the torque only affected by the elastic tension of the elastic element and the weight of the gate, thus making the valve have the characteristic of light closing torque, allowing the user to easily close the valve.

[0022] (2) This utility model provides a novel sealing gate valve that utilizes an elastic element to apply a force away from the elastic element to two gate plates, enabling the gate plates to adapt to valves of different sizes. When the valve seat differs in size and bevel angle from the two gate plates during manufacturing, the elastic element can push the two gate plates outward, making them tightly adhere to the valve seat, thereby ensuring sealing. The gate plates of this utility model have strong adaptability and compatibility, and the structure is simple and easy to manufacture, making processing and manufacturing simple and convenient, and reducing production costs.

[0023] (3) The novel sealing gate valve provided by this utility model has a connecting buckle between the two gates to connect the two gates together and limit the distance between the two gates to prevent the elastic element from pushing the two gates outward too far, which would prevent the gates from fitting smoothly with the valve seat. At the same time, a valve stem nut is provided on the first connecting buckle. After the connecting buckle is engaged with the left and right sides, it is locked into the valve stem nut, and the valve stem nut will not come off.

[0024] (4) The present invention provides a novel sealing gate valve in which, after the two parts of the connecting buckle are connected, there is a space for movement in the slot, allowing the two gate valves to move closer or further apart within a certain limit, thereby adapting to valves of different sizes. At the same time, it can also reduce the torque for closing and opening the valve, making it convenient for users to use. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the gate valve of this utility model;

[0026] Figure 2 This is a schematic diagram of the gate mechanism in the gate valve of this utility model;

[0027] Figure 3 This is a front view of the gate mechanism in the gate valve of this utility model;

[0028] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle;

[0029] Figure 5 This is a schematic diagram of the structure of the first gate plate in the gate valve of this utility model from a first-view perspective;

[0030] Figure 6 This is a schematic diagram of the structure of the first gate plate in the gate valve of this utility model from a second perspective;

[0031] Figure 7 This is a cross-sectional view of the gate valve of this utility model;

[0032] Figure 8 This is a schematic diagram of the valve stem nut of this utility model;

[0033] Explanation of the labels in the diagram:

[0034] 1. Valve cover; 2. Valve body; 21. First port; 22. Second port; 3. Gate mechanism; 31. Rotary wheel; 32. Valve stem; 33. Valve stem nut; 331. Upper limit part; 332. Connecting part; 333. Lower limit part; 334. Screw hole; 34. Gate; 341. First gate; 3411. Plate; 3412. Mounting groove; 3413. Protrusion; 342. Second gate; 35. Connecting buckle; 351. First connecting buckle; 352. Second connecting buckle; 353. First fastener; 3531. Base part; 3532. Snap-on; 3533. Snap-on groove; 354. Second fastener; 36. Elastic element; 4. Valve seat. Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Example 1

[0042] Combination Figure 1 and Figure 7 This embodiment of a novel sealing gate valve includes a valve cover 1 and a valve body 2. The valve cover 1 is mounted on the valve body 2. In this embodiment, the valve cover 1 is fixedly connected to the valve body 2 by screws. After the valve cover 1 is connected to the valve body 2, a valve cavity is formed inside, and a gate mechanism 3 is arranged inside the valve cavity. In this embodiment, the top of the valve cover 1 is open, and the end of the gate mechanism 3 extends out of the valve cavity. A rotating wheel 31 is provided at the end of the gate mechanism 3. The rotational motion of the rotating wheel 31 is converted into the up-and-down motion of the gate 34 by a screw structure, thereby performing the opening and closing operation of the gate valve. In this embodiment, the valve body 2 has a first port 21 and a second port 22 at both ends along the fluid flow direction. A valve seat 4 is provided inside the valve body 2 at the position directly opposite the valve cover 1. When it is necessary to close the valve, the gate 34 moves downward and fits against the valve seat 4. At this time, the fluid cannot flow from the first port 21 to the second port 22, thereby closing the gate valve.

[0043] Combination Figure 2 and Figure 3 In this embodiment, the gate mechanism 3 includes a rotating wheel 31, a valve stem 32, a valve stem nut 33, and a gate 34. In this embodiment, the rotating wheel 31 is located at the upper end of the valve stem 32 and extends outside the valve cover 1. The lower end of the valve stem 32 is inserted into the threaded hole 334 on the valve stem nut 33 and connected to the valve stem nut 33 through a threaded structure. The gate 34 is connected to the valve stem nut 33. When the rotating wheel 31 rotates with the valve stem 32, the valve stem nut 33, which is threaded to the valve stem 32, will move up and down on the valve stem 32, thereby driving the gate 34 to move up and down, thus realizing the function of opening and closing the valve.

[0044] The gate 34 includes a first gate 341 and a second gate 342. The distance between the upper ends of the first gate 341 and the second gate 342 is greater than the distance between their lower ends, forming a wedge-shaped structure to facilitate entry into the valve seat 4. The first gate 341 and the second gate 342 are connected by an elastic element 36. In this embodiment, the elastic element 36 is a spring. The elastic element 36 applies a force away from the first gate 341 and the second gate 342, causing the first gate 341 and the second gate 342 to move away from each other. When the gate 34 enters the valve seat 4 to seal it, the elastic element 36 presses the first gate 341 and the second gate 342 against the valve seats 4 on both sides, resulting in a good sealing effect and preventing leakage. In this embodiment, an elastic element 36 is provided between the two gates 34 to connect them. The elastic element 36 applies a force away from the two gates 34. When the gate 34 moves downward to close the valve, the frictional force between the gate 34 and the valve seat 4 is only the elastic tension of the elastic element 36. The frictional force is small, which effectively reduces the wear of the sealing surface of the gate 34 and increases the service life of the valve. At the same time, the frictional force between the gate 34 and the valve seat 4 is also the handwheel rotation torque when closing the valve, i.e., torque. This design in this embodiment ensures that the torque is only affected by the elastic tension of the elastic element 36 and the gravity of the gate 34, thus giving the valve the characteristic of light closing torque, allowing the user to easily close the valve. In this embodiment, the elastic element 36 applies a force away from the elastic element 36 to the two gates 34, so that the gates 34 can be adapted to valves of different sizes. When the size and slope angle of the valve seat 4 are different from the two gates 34 during the manufacturing process, the elastic element 36 can push the two gates 34 outward so that they are tightly attached to the valve seat 4, thereby ensuring the sealing performance.

[0045] Combination Figure 4In this embodiment, a connecting buckle 35 is also provided between the first gate plate 341 and the second gate plate 342 to connect the two. Specifically, the connecting buckle 35 includes a first fastener 353 and a second fastener 354, which are fixedly connected to the first gate plate 341 and the second gate plate 342 respectively. The first fastener 353 and the second fastener 354 have the same structure, specifically including a base part 3531 for connecting the fastener to the gate plate 34. The base part 3531 extends outward to form a buckle 3532, which, together with the base part 3531, forms a groove 3533. When connecting the two fasteners, the buckle 3532 of the first fastener 353 is inserted into the groove 3533 of the second fastener 354, and at the same time, the buckle 3532 of the second fastener 354 is inserted into the groove 3533 of the first fastener 353. In this embodiment, the size of the slot 3533 is larger than the size of the buckle 3532, allowing the buckle 3532 to move within the slot 3533 along the elastic direction of the elastic member 36. A connecting buckle 35 is provided between the two gates 34 to connect them, limiting the distance between them and preventing the elastic member 36 from excessively pushing the two gates 34 outwards, which would prevent the gates 34 from properly engaging with the valve seat 4. After the two parts of the connecting buckle 35 are connected, there is room for movement within the slot 3533, allowing the two gate valves 34 to move closer or further apart within certain limits, thus adapting to valves of different sizes. This also reduces the torque required to close and open the valve, making it more convenient for the user.

[0046] In this embodiment, multiple connecting buckles 35 are provided, divided into first connecting buckles 351 and second connecting buckles 352. The first connecting buckle 351 is connected to the upper ends of the first gate plate 341 and the second gate plate 342, and the second connecting buckle 352 is connected to the middle or lower parts of the first gate plate 341 and the second gate plate 342. With this configuration, by setting the length of the first connecting buckle 351 to be longer than the length of the second connecting buckle 352, the distance between the upper ends of the first gate plate 341 and the second gate plate 342 can be greater than the distance between their lower ends. In this embodiment, to increase the connection stability of the first gate plate 341 and the second gate plate 342, two sets of elastic members 36 and two sets of connecting buckles 352 are provided. The second connecting buckles 352 are located on the side of the elastic member 36, and also near the edges of the first gate plate 341 and the second gate plate 342. The first connecting buckles 351 and the second connecting buckles 352 form an isosceles triangle structure on the gate plate 34, thereby making the connection between the two gate plates 34 more stable.

[0047] Combination Figure 8In this embodiment, a through hole is formed on the first connecting buckle 351. The through hole is oblong. In this embodiment, both the first fastener 353 and the second fastener 354 in the first connecting buckle 351 have arc-shaped notches. When the first fastener 353 and the second fastener 354 are connected together, they together form the oblong hole on the first connecting buckle 351. A valve stem nut 33 is installed in the through hole. Since the through hole is oblong, there is a gap between the valve stem nut 33 and the oblong hole. At this time, the two gates can move without being blocked by the valve stem nut 33.

[0048] In this embodiment, the valve stem nut 33 can drive the first gate 341 and the second gate 342 to move up and down together via the first connecting buckle 351. The valve stem nut 33 includes an upper limit portion 331, a connecting portion 332, and a lower limit portion 333. The upper limit portion 331 and the lower limit portion 333 are respectively disposed at both ends of the connecting portion 332. The first connecting buckle 351 is engaged and positioned at the connecting portion 332. The upper limit portion 331 and the lower limit portion 333 restrict the vertical movement of the first connecting buckle 351. In this embodiment, after the two parts of the first connecting buckle 351 are connected, they are engaged at the position of the connecting portion 332, with their upper and lower end faces abutting against the upper limit portion 331 and the lower limit portion 333 respectively. This prevents relative displacement between the first connecting buckle 351 and the valve stem nut 33, thus preventing the valve stem nut 33 from loosening. This allows the gate 34 to move together with the valve stem nut 341 via the first connecting buckle 351.

[0049] Combination Figure 5 and Figure 6 In this embodiment, the first gate plate 341 and the second gate plate 342 have the same structure, specifically including a plate body 3411. A connecting buckle 35 and a mounting groove 3412 for mounting the elastic element 36 are provided on the side of the plate body 3411 facing the other gate plate 34. An outwardly protruding protrusion 3413 is provided on the other side of the first gate plate 341, forming an annular structure along the circumference of the first gate plate 341. The protrusion 3413 provides better sealing of the valve seat 4.

[0050] Example 2

[0051] This embodiment of a novel sealing gate valve provides a second connection method between the first connecting buckle 351 and the valve stem nut 33. In this embodiment, a through hole is formed on the first connecting buckle 351, which is located on either the first fastener 353 or the second fastener 354 within the first connecting buckle 351, and the valve stem nut 33 is disposed within the through hole.

[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 novel sealing gate valve, comprising a valve cover (1) and a valve body (2), wherein the valve cover (1) covers the valve body (2), and a gate mechanism (3) is provided inside the valve body (2), the gate mechanism (3) being used to seal the valve seat (4) of the valve body (2); characterized in that, The gate mechanism (3) includes a first gate (341) and a second gate (342), which are connected by an elastic member (36). The elastic member (36) is used to apply a force away from the elastic member (36) to the first gate (341) and the second gate (342). A first fastener (353) and a second fastener (354) are respectively provided on the first gate (341) and the second gate (342). The buckle (3532) of the first fastener (353) is inserted into the slot (3533) of the second fastener (354), and the buckle (3532) can move in the slot (3533) along the elastic force direction of the elastic member (36).

2. The novel sealing gate valve according to claim 1, characterized in that, The first fastener (353) includes a base part (3531) which is connected to a first gate plate (341) or a second gate plate (342); the base part (3531) extends outward to form a buckle (3532), which together with the base part (3531) forms a slot (3533); the second fastener (354) has the same structure as the first fastener (353).

3. A novel sealing gate valve according to claim 2, characterized in that, The buckle (3532) of the first fastener (353) is inserted into the slot (3533) of the second fastener (354), and the buckle (3532) of the second fastener (354) is inserted into the slot (3533) of the first fastener (353). Both the buckle (3532) of the first fastener (353) and the buckle (3532) of the second fastener (354) can move in the slot (3533).

4. A novel sealing gate valve according to claim 1, characterized in that, The first fastener (353) and the second fastener (354) are connected together to form a connecting buckle (35). The connecting buckle (35) includes a first connecting buckle (351) and a second connecting buckle (352). The first connecting buckle (351) is connected to the upper end of the first gate plate (341) and the second gate plate (342), and the second connecting buckle (352) is connected to the middle or lower part of the first gate plate (341) and the second gate plate (342).

5. A novel sealing gate valve according to any one of claims 1-4, characterized in that, The first connecting buckle (351) has a through hole, and a valve stem nut (33) is provided in the through hole. The valve stem nut (33) can drive the first gate (341) and the second gate (342) to move up and down together through the first connecting buckle (351).

6. A novel sealing gate valve according to claim 5, characterized in that, The valve stem nut (33) includes an upper limit part (331), a connecting part (332) and a lower limit part (333). The upper limit part (331) and the lower limit part (333) are respectively disposed at both ends of the connecting part (332). The first connecting buckle (351) is disposed at the connecting part (332) after being engaged. The upper limit part (331) and the lower limit part (333) are used to restrict the first connecting buckle (351) from moving in the vertical direction.

7. A novel sealing gate valve according to claim 6, characterized in that, The valve stem nut (33) is set on the valve stem (32), and a screw hole (334) is opened on the valve stem nut (33). The valve stem (32) is inserted into the screw hole (334) and threadedly connected to the valve stem nut (33). The valve stem nut (33) can move along the length direction of the valve stem (32).

8. A novel sealing gate valve according to claim 4, characterized in that, The first gate (341) includes a plate body (3411), and the plate body (3411) is provided with a connecting buckle (35) and a mounting groove (3412) for mounting an elastic element (36) on the side facing the second gate (342).

9. A novel sealing gate valve according to claim 8, characterized in that, The first gate (341) has an outwardly protruding protrusion (3413) on its other side, and the protrusion (3413) forms a ring structure along the circumference of the first gate (341); the second gate (342) has the same structure as the first gate (341).

10. A novel sealing gate valve according to claim 7, characterized in that, A rotating wheel (31) is provided at the end of the valve stem (32), and the rotating wheel (31) is used to drive the valve stem (32) to rotate.

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