shutoff valve

Abstract

This utility model provides a shut-off valve, comprising a valve body having a valve cavity and a valve port; a sleeve having an installation cavity, the sleeve being directly or indirectly fixedly connected to the valve body and sealingly fitted with the valve body; the valve port, valve cavity, and installation cavity being arranged sequentially; a valve core disposed within the valve body, capable of moving relative to the valve port to block or open the valve port; a flow gap between the outer wall of the valve core and the inner wall of the valve body, allowing the valve port to communicate with the installation cavity through the flow gap when the valve core opens the valve port; and a driving component disposed within the installation cavity, driven by the valve core to drive the valve core to move relative to the valve port. Applying the technical solution of this application solves the problem in the prior art where the valve core needs to overcome significant resistance during rotation.

Description

Technical Field

[0001] This utility model relates to the field of control valve technology, and more specifically, to a shut-off valve. Background Technology

[0002] Currently, gate valves are commonly used in pipeline systems to control fluid flow. In existing technology, gate valves typically include a valve body and a valve core. The valve core is rotatably mounted in the valve body and is threaded into the valve body. The valve core converts rotational motion into linear displacement through the thread between it and the valve body. This allows the valve core to block or open the valve port, thereby controlling the flow of fluid.

[0003] In existing technologies, to ensure the sealing performance of the valve body and prevent fluid leakage from the valve body to the outside, a sealing ring is usually installed on the valve core to seal the gap between the valve core and the valve body, thereby maximizing the sealing performance of the valve body. However, because the sealing ring on the valve core needs to maintain a sealing state during the rotation of the valve core, the friction between the sealing ring and the valve body will generate significant resistance to the rotation of the valve core, affecting the normal movement of the valve core. Utility Model Content

[0004] This invention provides a shut-off valve to solve the problem of the large resistance that needs to be overcome when the valve core rotates in the prior art.

[0005] This utility model provides a shut-off valve, comprising: a valve body having a valve cavity and a valve port; a sleeve having an installation cavity, the sleeve being directly or indirectly fixedly connected to the valve body and sealingly fitted with the valve body, the valve port, valve cavity, and installation cavity being arranged sequentially; a valve core disposed within the valve body, the valve core being movable relative to the valve port to block or open the valve port, a flow gap being provided between the outer side wall of the valve core and the inner side wall of the valve body, the valve port communicating with the installation cavity through the flow gap when the valve core opens the valve port; and a driving component disposed within the installation cavity, the driving component being drivingly connected to the valve core for driving the valve core to move relative to the valve port.

[0006] Furthermore, a sealing gasket is provided at the end of the valve core facing the valve port. The sealing gasket is used to seal with the valve port, and the hardness of the sealing gasket is less than that of the valve body.

[0007] Furthermore, the sleeve has an opening that overlaps with the valve body, and the outer periphery of the opening is welded to the valve body.

[0008] Furthermore, a threaded structure is provided between the inner wall of the valve body and the outer wall of the valve core, and the driving component drives the valve core to rotate relative to the valve body to open the seal or open the valve port.

[0009] Furthermore, the driving component has a valve stem, the valve core has a plug hole, the valve stem is plugged into the plug hole, and an anti-rotation structure is provided between the valve stem and the inner wall of the plug hole, so that the valve stem abuts against the plug hole through the anti-rotation structure to prevent rotation.

[0010] Furthermore, the insertion hole has a first hole segment and a second hole segment that are interconnected. The first hole segment is located on the side of the second hole segment closer to the drive member. The inner diameter of the first hole segment is larger than the inner diameter of the second hole segment. A stepped surface is formed between the first hole segment and the second hole segment, and the valve stem abuts against the stepped surface.

[0011] Furthermore, the valve stem has a first end and a second end that are arranged opposite to each other, the second end of the valve stem is always driven to be connected to the valve core, and there is a telescopic structure between the first end and the second end.

[0012] Furthermore, the outer periphery of the valve port facing the valve core has an annularly arranged mating boss, which extends towards the valve core and is used to abut against the sealing gasket for sealing.

[0013] Furthermore, the thickness of the mating boss gradually decreases along the direction from the valve port to the valve core.

[0014] Furthermore, the valve core has an annular mounting groove at the end facing the valve port, and a sealing gasket is placed inside the mounting groove and riveted to the side wall of the mounting groove.

[0015] The present invention provides a gate valve comprising a valve body, a sleeve, a valve core, and a drive component. The drive component can drive the valve core to block or open the valve port, thereby controlling the flow of fluid. The drive component is disposed within the mounting cavity of the sleeve, and the valve core is disposed within the valve cavity. By fixing and sealing the sleeve to the valve body, the mounting cavity and the valve cavity together form an integral sealed chamber, achieving a seal for the gate valve and preventing fluid leakage from the valve cavity. This eliminates the need for separate sealing of the valve body and valve core, transferring the sealing point between the valve core and valve body to the drive component and valve body. It also eliminates the need for a sealing ring on the valve core, reduces the resistance that the valve core must overcome during rotation, and increases the opening and closing speed of the gate valve. Furthermore, a drive component with lower torque can be used, reducing the manufacturing cost of the gate valve. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A cross-sectional view of the shut-off valve provided by this utility model is shown;

[0018] Figure 2 It shows Figure 1 A magnified view of a section at point A in the middle;

[0019] Figure 3 A partial cross-sectional view of the valve stem and valve core assembly provided by this utility model is shown.

[0020] The above figures include the following reference numerals:

[0021] 100. Valve body; 101. Valve cavity; 102. Valve port; 110. Threaded structure; 120. Mating boss;

[0022] 200. Sleeve; 201. Mounting cavity;

[0023] 300, Valve core; 310, Sealing gasket; 320, Insertion hole;

[0024] 400. Drive component; 410. Valve stem; 420. Telescopic rod section; 421. Connecting rod; 422. Movable rod; 423. Spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] like Figures 1 to 3 As shown, this utility model embodiment provides a shut-off valve, which includes a valve body 100, a sleeve 200, a valve core 300, and a drive component 400. The valve body 100 has a valve cavity 101 and a valve port 102 that are interconnected. The sleeve 200 has a mounting cavity 201 and is directly or indirectly fixedly connected to the valve body 100, and the sleeve 200 and the valve body 100 are in a sealing fit. The valve port 102, the valve cavity 101, and the mounting cavity 201 are arranged sequentially. The valve core 300 is disposed within the valve body 100 and can move relative to the valve port 102 to block or open the valve port 102. There is a flow gap between the outer wall of the valve core 300 and the inner wall of the valve body 100. When the valve core 300 opens the valve port 102, the valve port 102 communicates with the mounting cavity 201 through the flow gap. The drive component 400 is disposed in the mounting cavity 201 and is drivenly connected to the valve core 300 to drive the valve core 300 to move relative to the valve port 102.

[0027] The stop valve, using the technical solution of this utility model, includes a valve body 100, a sleeve 200, a valve core 300, and a drive component 400. The drive component 400 can drive the valve core 300 to block or open the valve port 102, thereby realizing the control of fluid flow by the stop valve. The drive component 400 is disposed within the mounting cavity 201 of the sleeve 200, and the valve core 300 is disposed within the valve cavity 101. By fixing and sealing the sleeve 200 to the valve body 100, the mounting cavity 201 and the valve cavity 101 together form an integral sealed chamber, thereby sealing the gate valve and preventing fluid leakage from the valve cavity 101. Thus, there is no need to separately seal the valve body 100 and the valve core 300. The sealing point between the valve core 300 and the valve body 100 is transferred to the drive component 400 and the valve body 100, eliminating the need for the sealing ring on the valve core 300, reducing the resistance that the valve core 300 needs to overcome to rotate, and improving the opening and closing speed of the gate valve. Furthermore, a drive component 400 with a smaller torque can be used, reducing the manufacturing cost of the gate valve.

[0028] Specifically, the shut-off valve provided in this application is an electric shut-off valve. The driving component 400 includes a rotor, and an electromagnetic coil is sleeved on the outside of the sleeve 200. The rotor is driven to rotate by the electromagnetic coil. The sleeve 200 and the valve body 100 can be directly fixedly connected, or the sleeve 200 and the valve body 100 can be fixedly connected by a connector.

[0029] Furthermore, a threaded structure 110 is provided between the inner wall of the valve body 100 and the outer wall of the valve core 300. The driving member 400 drives the valve core 300 to rotate relative to the valve body 100. When the rotor drives the valve core 300 to rotate, the threaded structure 110 can convert the rotation of the valve core 300 into linear motion relative to the valve port 102, so that the valve core 300 moves closer to or further away from the valve port 102, thereby opening the blockage or opening the valve port 102.

[0030] In existing technologies, the seal between the valve core and the valve port is a hard seal. This requires significant pressure for the valve core to adhere to the valve port when sealing it, necessitating a large torque output from the drive unit 400 to press the valve core against the valve port. Furthermore, the direct seal between the valve core and the valve port places high demands on the sealing at this point; uneven contact between the valve core and the valve port can easily lead to leakage. In this application, the valve core 300 has a sealing gasket 310 at the end facing the valve port 102. The hardness of the sealing gasket 310 is less than that of the valve body 100. This allows for a flexible sealing fit between the sealing gasket 310 and the valve port 102. The drive unit 400 only needs to output a lower torque to cause the sealing gasket 310 to deform flexibly against the valve port 102, reducing the torque required from the drive unit 400. Moreover, the flexible deformation of the sealing gasket 310 better seals the valve port 102, reducing internal leakage of the shut-off valve. This application, by setting a sealing gasket 310 without setting a sealing ring on the valve core 300, can minimize the output torque requirement of the drive component 400, reduce the manufacturing cost of the shut-off valve, and reduce the usage requirements of the shut-off valve.

[0031] Furthermore, the sleeve 200 has an opening that is inserted into the valve body 100, and the outer periphery of the opening is welded to the valve body 100 to achieve a fixed connection between the sleeve 200 and the valve body 100, and to achieve a sealing fit between the sleeve 200 and the valve body 100. No sealing element is provided between the valve body 100 and the sleeve 200, which reduces the sealing design requirements of the gate valve and simplifies the overall structure of the gate valve.

[0032] Specifically, the outer periphery of the valve port 102 facing the valve core 300 has an annularly arranged mating boss 120. The mating boss 120 extends towards the valve core 300 and is used to seal with the sealing gasket 310. This arrangement increases the deformation degree of the sealing gasket 310, enabling it to seal the outer and inner peripheries of the mating boss 120, thereby improving the sealing performance of the sealing gasket 310.

[0033] Furthermore, the thickness of the mating boss 120 gradually decreases along the direction from the valve port 102 to the valve core 300. This design reduces the contact area between the mating boss 120 and the sealing gasket 310, increases the pressure on the sealing gasket 310, and improves the deformation degree of the sealing gasket 310.

[0034] Specifically, the valve core 300 has an annular mounting groove at one end facing the valve port 102, and the sealing gasket 310 is disposed in the mounting groove. The sealing gasket 310 is riveted to the inner or outer side wall of the mounting groove to improve the stability of the assembly between the sealing gasket 310 and the valve core 300 and to prevent the sealing gasket 310 from falling off.

[0035] In this application, the drive component 400 has a valve stem 410 and the valve core 300 has a insertion hole 320. The valve stem 410 is inserted into the insertion hole 320. This arrangement allows the valve stem 410 to remain stationary while the valve core 300 can move axially relative to the valve stem 410, enabling the valve core 300 to move closer to or further away from the valve port 102. Furthermore, an anti-rotation structure is provided between the valve stem 410 and the inner wall of the insertion hole 320. The valve stem 410 abuts against the insertion hole 320 through the anti-rotation structure to prevent rotation of the valve stem 410 relative to the valve core 300, thus preventing the valve stem 410 from spinning freely and ensuring the driving effect of the drive component 400.

[0036] Specifically, the anti-rotation structure can be a keyway or a cutting surface, etc.

[0037] Furthermore, the insertion hole 320 has a first hole segment and a second hole segment that are interconnected. The first hole segment is located on the side of the second hole segment closer to the drive member 400. The inner diameter of the first hole segment is larger than the inner diameter of the second hole segment, and a stepped surface is formed between the first hole segment and the second hole segment. The valve stem 410 abuts against the stepped surface. With this configuration, the stepped surface forms a positioning reference for the valve stem 410, allowing the valve stem 410 and the valve core 300 to be properly assembled. This prevents the mating length and mating area between the valve stem 410 and the valve core 300 from being too small, ensuring the transmission efficiency of the drive member 400 while enabling the drive member 400 to drive the valve core 300 to rotate with a smaller output torque.

[0038] In some feasible embodiments of this application, the valve stem 410 has a first end and a second end that are arranged opposite to each other. The second end of the valve stem 410 is always driven and connected to the valve core 300. There is a telescopic structure between the first end and the second end. The length of the valve stem 410 can be adjusted between the first end and the second end through the telescopic structure to ensure the matching length between the valve stem 410 and the valve core 300, to ensure the output effect of the valve stem 410, and to prevent the valve stem 410 from spinning freely.

[0039] Reference Figure 3 As shown, the length adjustment structure includes a telescopic rod section 420, which is located at the end of the valve stem 410 near the valve core 300. The telescopic rod section 420 includes a connecting rod 421 and a movable rod 422. One end of the connecting rod 421 is fixedly connected to the valve stem 410, and the other end of the connecting rod 421 is inserted into the movable rod 422. The end of the movable rod 422 away from the connecting rod 421 forms a second end, and the movable rod 422 can move relative to the connecting rod 421. The movable rod 422 is inserted into the insertion hole 320. When the valve core 300 moves towards the valve port 102, the movable rod 422 can move away from the rotor to ensure the mating area and mating length between the movable rod 422 and the valve core 300. When the valve core 300 moves away from the valve port 102, the movable rod 422 can move towards the rotor to adapt to the displacement of the valve core 300.

[0040] Furthermore, an anti-rotation structure can be provided on the movable rod 422. The outer wall of the movable rod 422 can be provided with multiple limiting surfaces, so that the movable rod 422 forms a non-circular rod, and the shape of the insertion hole 320 is adapted to the shape of the movable rod 422.

[0041] Specifically, the movable rod 422 can be a hexagonal column, and the insertion hole 320 can be a hexagonal hole, so as to facilitate the manufacturing and assembly of the movable rod 422 and the insertion hole 320.

[0042] Furthermore, a spring 423 is fitted on the connecting rod 421. The spring 423 is used to provide elastic force to the movable rod 422 in the direction of the valve core 300. The spring 423 cooperates with the stepped surface to ensure that when the valve core 300 moves in the direction of the valve port 102, the movable rod 422 can always be located in the insertion hole 320.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0045] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not 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 on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shut-off valve, characterized in that, The shut-off valve includes: A valve body (100) having a valve cavity (101) and a valve port (102); A sleeve (200) having an installation cavity (201) is provided. The sleeve (200) is directly or indirectly fixedly connected to the valve body (100), and the sleeve (200) is sealed to the valve body (100). The valve port (102), the valve cavity (101), and the installation cavity (201) are arranged sequentially. A valve core (300) is disposed inside the valve body (100). The valve core (300) is movable relative to the valve port (102) to block or open the valve port (102). There is a flow gap between the outer side wall of the valve core (300) and the inner side wall of the valve body (100). When the valve core (300) opens the valve port (102), the valve port (102) communicates with the mounting cavity (201) through the flow gap. A drive member (400) is disposed in the mounting cavity (201) and is drivenly connected to the valve core (300) for driving the valve core (300) to move relative to the valve port (102).

2. The shut-off valve according to claim 1, characterized in that, A sealing gasket (310) is provided at one end of the valve core (300) facing the valve port (102). The sealing gasket (310) is used to seal with the valve port (102). The hardness of the sealing gasket (310) is less than that of the valve body (100).

3. The shut-off valve according to claim 1, characterized in that, The sleeve (200) has an opening that overlaps with the valve body (100), and the outer periphery of the opening is welded to the valve body (100).

4. The shut-off valve according to claim 1, characterized in that, The inner wall of the valve body (100) and the outer wall of the valve core (300) are provided with a threaded structure (110). The driving member (400) drives the valve core (300) to rotate relative to the valve body (100) to open the blockage or open the valve port (102).

5. The shut-off valve according to claim 4, characterized in that, The drive unit (400) has a valve stem (410), and the valve core (300) has a plug hole (320). The valve stem (410) is plugged into the plug hole (320). An anti-rotation structure is provided between the valve stem (410) and the inner wall of the plug hole (320). The valve stem (410) abuts against the plug hole (320) to prevent rotation through the anti-rotation structure.

6. The shut-off valve according to claim 5, characterized in that, The insertion hole (320) has a first hole segment and a second hole segment that are interconnected. The first hole segment is located on the side of the second hole segment that is close to the drive member (400). The inner diameter of the first hole segment is larger than the inner diameter of the second hole segment. A stepped surface is formed between the first hole segment and the second hole segment. The valve stem (410) abuts against the stepped surface.

7. The shut-off valve according to claim 5, characterized in that, The valve stem (410) has a first end and a second end that are arranged opposite to each other. The second end of the valve stem (410) is always driven to be connected to the valve core (300). There is a telescopic structure between the first end and the second end.

8. The shut-off valve according to claim 2, characterized in that, The valve port (102) has an annularly arranged mating boss (120) on the outer periphery facing the valve core (300). The mating boss (120) extends towards the valve core (300) and abuts against the sealing gasket (310) for sealing.

9. The shut-off valve according to claim 8, characterized in that, The thickness of the mating boss (120) gradually decreases along the direction from the valve port (102) to the valve core (300).

10. The shut-off valve according to claim 2, characterized in that, The valve core (300) has an annular mounting groove at one end facing the valve port (102), and the sealing gasket (310) is disposed in the mounting groove and is riveted to the side wall of the mounting groove.

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