Double-gate-plate wedge gate valve
By designing a double-gate wedge gate valve, the sliding connection between the wedge block and the gate ring, along with the limiting rod, solves the opening problem of a single-gate wedge gate valve, achieving stable valve torque and bidirectional sealing. It is suitable for pneumatic or electric actuators.
Patent Information
- Application Number
- CN202422666238.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-11-01
AI Technical Summary
Most existing wedge gate valves have a single gate structure, which makes them difficult to open after being wedged and causes sudden torque changes, affecting the choice of pneumatic or electric actuators.
The double-gate wedge gate valve adopts a structure that utilizes the sliding connection between the wedge block and the gate ring, combined with the design of the limit rod and valve stem, to achieve a stable seal between the gate ring and the valve seat ring, avoiding the phenomenon of tightening and jamming.
It achieves stable valve torque, ensures bidirectional sealing, eliminates tension jamming, and is suitable for pneumatic or electric actuators.
Smart Images
Figure CN223595027U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a valve, concretely a double gate plate wedge type gate valve. BACKGROUND
[0002] The gate valve is one of commonly used pipeline control devices, which is composed of a valve body, a valve cover, a gate plate, a valve rod, a valve seat, a support, an upper sealing seat and other parts. When the hand wheel rotates, it drives the valve rod nut to rotate, and then the valve rod nut drives the valve rod to rise and fall, thereby realizing medium flow or isolation. There are many types of gate valves, including wedge type double gate plate gate valves. Current wedge type gate valves are mostly single gate plate structures, and the gate plate adopts an elastic structure. After being wedged, the gate plate cannot be opened, and the torque suddenly changes, which is not conducive to the selection of pneumatic or electric actuators. SUMMARY
[0003] In order to solve the above technical problems, the application provides a double gate plate wedge type gate valve.
[0004] In order to solve the above technical problems, the application adopts the following technical scheme:
[0005] A double gate plate wedge type gate valve comprises a valve body and an actuator arranged at one end of the valve body. The valve body is internally provided with a valve rod, a wedge-shaped block, a gate plate ring and a limiting rod. The middle part of the gate plate ring is provided with a recess. The upper part and the lower part of the gate plate ring are respectively provided with sealing surfaces. The valve body is internally provided with a mounting cavity. The side wall of the mounting cavity is provided with a valve seat ring. The wedge-shaped block is arranged in the mounting cavity. The gate plate ring is arranged between the wedge-shaped block and the valve seat ring, and the gate plate ring is slidably connected with the wedge-shaped block. The bottom of the wedge-shaped block is connected with the limiting rod. The side surface of the wedge-shaped block is an inclined surface which is inclined from inside to outside. The valve seat ring and the gate plate ring are arranged at the same inclined angle with the inclined surface of the wedge-shaped block. The valve rod is connected with the wedge-shaped block. The sealing surfaces are in contact with the valve seat ring to form a seal. One gate plate ring is arranged on each side of the wedge-shaped block.
[0006] As a further improvement, the inclined surface of the wedge-shaped block is inclined at an angle of 3-10 degrees.
[0007] As a further improvement, the side wall of the wedge-shaped block is provided with a clamping sliding rail, and the gate plate ring is provided with a clamping sliding groove. The clamping sliding rail is clamped into the clamping sliding groove.
[0008] As a further improvement, the wedge-shaped block is internally provided with a reverse T-shaped clamping opening, and the end of the valve rod is embedded into the reverse T-shaped clamping opening.
[0009] As a further improvement, the limiting rod is connected with the wedge-shaped block through a threaded structure.
[0010] As a further improvement, the end of the valve rod is provided with a stop position part. When the sealing surface on the upper part of the gate plate ring is in contact with the upper part of the valve seat ring to form a seal, the width of the stop position part is greater than the width of the upper end of the inner side of the gate plate ring on the two sides of the wedge-shaped block.
[0011] As a further improvement, the limiting rod is a cylindrical rod, and the width of the limiting rod is less than the width of the inner lower end of the gate ring on both sides of the wedge block when the sealing surface of the lower part of the gate ring is in contact with the lower part of the valve seat ring.
[0012] Compared with the prior art, the utility model has the following beneficial technical effects:
[0013] By the cooperation of the wedge block and the gate ring, the wedge block is moved by the valve stem, the gate ring can slide relative to the wedge block, the contact sealing with the valve seat ring is realized, the valve torque is stable, the bidirectional sealing of the gate valve is realized, and there is no tightening and jamming phenomenon. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a cross-sectional structure schematic view of the utility model;
[0015] Figure 2 It is an enlarged schematic view of A in Figure 1
[0016] Figure 3 It is an assembly schematic view of the wedge block in the utility model;
[0017] Figure 4 It is another perspective view schematic view of the wedge block in the utility model. DETAILED DESCRIPTION
[0018] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the present application, and cannot be understood as a limitation of the present application.
[0019] In the description of the present application, it needs to be understood that, if there are terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.
[0020] In the description of the present application, it needs to be understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected. It can be mechanical connection, or electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0021] As shown in Figures 1-4 A double gate plate wedge type gate valve, comprising a valve body 1 and an actuator 2 arranged at one end of the valve body, a valve stem 3, a wedge block 4, a gate ring 5 and a limiting rod 6 are arranged in the valve body 1, the middle part of the gate ring 5 is provided with a avoiding groove 7, the upper part and the lower part of the gate ring 5 are respectively provided with a sealing surface 8, the valve body 1 is provided with a mounting cavity, the side wall of the mounting cavity is provided with a valve seat ring 9, the wedge block 4 is arranged in the mounting cavity, the gate ring 5 is arranged between the wedge block 4 and the valve seat ring 9, and the gate ring 5 is in sliding connection with the wedge block 4, the bottom of the wedge block 4 is connected with the limiting rod 6, the side surface of the wedge block 4 is an inclined surface from inside to outside, the valve seat ring 9 and the gate ring 5 are arranged at the same inclined angle with the inclined surface of the wedge block 4, the valve stem is connected with the wedge block, the sealing surface is in contact with the valve seat ring to form a seal, one gate ring 5 is arranged on each side of the wedge block, the surface of the gate ring 5 is a plane, and the gate ring 5 and the valve seat ring 9 are both arranged obliquely, so that the wedge block 4, the gate ring 5 and the valve seat ring 9 are matched and installed. The actuator drives the valve stem to move, and then drives the wedge block to move, the gate ring will follow the movement, and the gate ring will be limited by the valve seat ring. The limiting rod moves synchronously with the wedge block. The avoiding groove 7 will not be in contact with the side wall of the valve seat ring 9 under any circumstances.
[0022] The inclination angle of the inclined surface of the wedge-shaped block 4 is 3-10 degrees, preferably 5 degrees.
[0023] The wedge-shaped block 4 is provided with a reverse T-shaped notch, and the end of the valve rod is embedded in the reverse T-shaped notch.
[0024] The side wall of the wedge-shaped block 4 is provided with a clamping sliding rail, and the clamping sliding rail is clamped into a clamping sliding groove provided on the gate ring 5, so that the gate ring can move up and down relative to the wedge-shaped block by a stroke.
[0025] The limiting rod 6 is connected with the wedge-shaped block 4 through a threaded structure, so that the limiting rod can be conveniently installed and disassembled.
[0026] The end of the valve rod 2 is provided with a stop portion 10, and when the sealing surface 8 on the upper part of the gate ring 5 is in contact with the upper part of the valve seat ring 9, the width of the stop portion 10 is greater than the width, i.e. the straight-line distance, of the upper end of the inner side of the gate ring 5 on both sides of the wedge-shaped block 4. After installation, the gate ring can have a certain displacement, but it will be limited by the stop portion of the valve rod, i.e. the upward movement stroke of the gate ring is limited, so that the gate ring will not come off from the upper part.
[0027] The limiting rod 6 is a cylindrical rod, and when the sealing surface 8 on the lower part of the gate ring 5 is in contact with the lower part of the valve seat ring 9, the width of the limiting rod 6 is less than the width, i.e. the straight-line distance, of the lower end of the inner side of the gate ring 5 on both sides of the wedge-shaped block 4. When the gate ring moves downward, it will be stopped by the limiting rod, so that it will not fall off.
[0028] When the gate valve is closed: the valve rod moves downward, driving the wedge-shaped block to move downward, thereby driving the gate rings on both sides to move downward. After the sealing surfaces on the upper and lower parts of the gate ring come into contact with the valve seat ring, the gate ring stops moving. At this time, the valve rod will still move downward under the action of the actuator, so that the valve rod will press the wedge-shaped block and have a tendency to continue to move downward. In the presence of the 5° inclination angle of the wedge-shaped block, a lateral pressure is generated on the gate ring, so that the gate ring is pressed on the valve seat ring, thereby achieving sealing.
[0029] When the gate valve is opened: the valve rod moves upward, driving the wedge-shaped block to move upward, thereby driving the gate ring to disengage from the valve seat ring. The wedge-shaped block no longer forms a lateral pressure on the gate ring, and the gate ring will fall downward under the action of its own weight until the bottom of the gate ring comes into contact with the limiting rod and stops moving. At this time, the valve rod continues to move upward, thereby driving the entire wedge-shaped block and the gate ring to continue to move upward and away from the flow passage position, thereby achieving complete opening of the valve.
[0030] It should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, but any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A double-gate wedge gate valve, comprising a valve body and an actuator disposed at one end of the valve body, characterized in that, The valve body contains a valve stem, a wedge block, a gate ring, and a limiting rod. The gate ring has a relief groove in the middle, and sealing surfaces are provided on the upper and lower parts of the gate ring. The valve body has an installation cavity, and a valve seat ring is provided on the side wall of the installation cavity. The wedge block is located in the installation cavity, and the gate ring is located between the wedge block and the valve seat ring, and the gate ring and the wedge block are slidably connected. The bottom of the wedge block is connected to the limiting rod. The side of the wedge block is an inclined surface from the inside to the outside. The valve seat ring and the gate ring are both set with the same inclination angle as the inclined surface of the wedge block. The valve stem is connected to the wedge block, and a seal is formed when the sealing surface contacts the valve seat ring. A gate ring is provided on each side of the wedge block.
2. The double-gate wedge gate valve according to claim 1, characterized in that, The inclination angle of the inclined surface of the wedge block is 3-10 degrees.
3. The double-gate wedge gate valve according to claim 1, characterized in that, The wedge-shaped block has a locking slide rail on its side wall and a locking groove on the gate ring. The locking slide rail is inserted into the locking groove.
4. The double-gate wedge gate valve according to claim 1, characterized in that, The wedge block has an inverted T-shaped notch, into which the end of the valve stem is fitted.
5. The double-gate wedge gate valve according to claim 1, characterized in that, The limiting rod and the wedge block are connected by a threaded structure.
6. The double-gate wedge gate valve according to claim 1, characterized in that, The valve stem has a stop portion at its end. When the sealing surface of the upper part of the gate ring contacts and seals with the upper part of the valve seat ring, the width of the stop portion is greater than the width of the upper inner side of the gate ring on both sides of the wedge block.
7. The double-gate wedge gate valve according to claim 1, characterized in that, The limiting rod is a cylindrical rod. When the sealing surface of the lower part of the gate ring contacts and seals with the lower part of the valve seat ring, the width of the limiting rod is less than the width of the lower inner side of the gate ring on both sides of the wedge block.