A stop valve

Abstract

The utility model discloses a stop valve, including the valve body, the flow channel is formed in the valve body, the valve body is provided with the valve clack that carries out the cut -off of flow channel, and its characterized is: the valve body is provided with the control flow cover, the control flow cover is located the valve clack outer periphery of sliding, the control flow cover is provided with a plurality of and each other sliding setting, and the control flow cover all is provided with the control flow groove, the control flow groove is reduced gradually from the outermost control flow cover to the innermost control flow cover, when the valve clack drive control flow cover coincides, the valve clack seals the control flow groove, and the control flow cover is provided with the restriction piece. The utility model has the advantages and effects as follows: through setting up a plurality of control flow cover, can effectively control the flow of valve, so that the valve is opened, and the impact that the valve clack receives can be smaller.

Description

Technical Field

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

[0002] As a basic fluid control device, the gate valve opens and closes pipelines by vertically raising and lowering the valve disc. However, under high-pressure conditions such as high differential pressure and large diameter, the traditional gate valve structure reveals significant drawbacks: the valve disc must overcome the enormous static pressure of the medium at the moment of closure, resulting in extremely high operating torque and exceptionally difficult opening and closing.

[0003] To alleviate the aforementioned problems, existing technologies employ solutions such as adding bypass pipelines or designing multi-stage pressure-reducing valve cores. However, these methods often result in complex system structures, high costs, and the introduction of additional leakage points, and their pressure-reducing and flow-control effects remain insufficient. Therefore, there is an urgent need for a compact structure that can significantly reduce operating torque. Utility Model Content

[0004] This invention provides a shut-off valve, which aims to solve the problem of difficult valve disc closure in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a shut-off valve, comprising a valve body, a flow channel formed within the valve body, a valve disc for cutting off the flow channel within the valve body, a flow control sleeve within the valve body, the flow control sleeve being slidably disposed on the outer periphery of the valve disc, multiple flow control sleeves being provided and slidably disposed relative to each other, and each flow control sleeve being provided with a flow control groove, the flow control grooves being progressively smaller from the outermost flow control sleeve to the innermost flow control sleeve, when the valve disc drives the flow control sleeves to overlap, the valve disc sealing the flow control groove, and a limiting member being provided on the flow control sleeve.

[0006] This utility model has the following effects: it is provided with multi-stage flow control sleeves and flow control grooves on the flow control sleeves. When the flow control sleeves and valve discs overlap, the valve discs seal the flow control grooves to achieve the valve shut-off effect. When the valve shuts off, the outermost flow control sleeves abut against the valve body. Then, as the valve discs move down, the flow control sleeves gradually overlap. As the flow control sleeves gradually overlap, the flow control grooves gradually shrink, causing the fluid to gradually decrease. Then the valve disc shuts off. During shut-off, the flow is controlled by the flow control sleeves, making it easier for the valve to shut off.

[0007] The present invention further comprises: the limiting member includes a sliding protrusion, the sliding protrusion is disposed on the outer periphery of the flow control sleeve, and a sliding groove is formed on the flow control sleeve that slides and cooperates with it.

[0008] The present invention has the following effects: it is provided with sliding protrusions, which allow the flow control sleeves to slide against each other for easy use, and also limit the movement between adjacent flow control sleeves.

[0009] The present invention further comprises: a first limiting block is formed on the sliding protrusion, the first limiting block protrudes outward from the sliding protrusion, and a second limiting block is provided at the other end of the sliding protrusion, and an inclined surface is formed on the second limiting block.

[0010] The present invention has the following effect: by forming limiting blocks at both ends, the flow control sleeves can be limited at both ends to prevent the two flow control sleeves from slipping and detaching.

[0011] The present invention further includes: the limiting member further includes a sealing filler, which is disposed in the sliding groove.

[0012] This invention has the following effects: it can seal the sliding groove, seal the two parts to ensure no leakage, and the sealing filler also has a certain elasticity.

[0013] The present invention further comprises: a limiting part is formed on one end of the flow control sleeve that is opposite to the flow control groove of the valve disc, a through hole is provided on the limiting part for the valve stem to pass through, and a sliding gap is formed inside the flow control sleeve, the sliding gap being located on the side of the flow control sleeve near the through hole.

[0014] The present invention has the following effects: by providing a limiting part, the sliding of the valve disc within the flow control sleeve can be restricted, and the distance between the two can be controlled.

[0015] The present invention further comprises: the valve body having a recessed valve stem groove for the valve stem to slide, the valve stem groove having a retaining groove on one side of the valve body, the retaining groove being adapted to the flow control sleeve, and when the valve stem moves upward, the flow control sleeve separating and sequentially residing in the retaining groove.

[0016] The present invention has the following effects: With the above-mentioned arrangement, when the valve stem moves upward, multiple flow control sleeves can be driven to engage in the sliding gap, ensuring that several flow control sleeves are separated from the valve disc. Attached Figure Description

[0017] Figure 1 This is a structural diagram of an embodiment of the present utility model;

[0018] Figure 2 This is a structural diagram of the flow control sleeve according to an embodiment of the present utility model;

[0019] Figure 3 This is a perspective view of the flow control sleeve according to an embodiment of the present utility model.

[0020] In the diagram: 1. Valve body; 2. Flow channel; 3. Valve disc; 31. Valve stem; 41. Flow control sleeve; 42. Flow control groove; 5. Sliding protrusion; 51. Sliding groove; 52. First limiting block; 53. Second limiting block; 54. Sealing packing; 55. Limiting part; 56. Sliding gap; 6. Valve stem groove; 7. Locking groove. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 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 of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] Reference Figures 1 to 3 The embodiments of this utility model will be further described below.

[0024] A shut-off valve includes a valve body 1, a flow channel 2 formed within the valve body 1, a valve disc 3 disposed within the valve body 1 to cut off the flow channel 2, and a flow control sleeve 41 disposed within the valve body 1. The flow control sleeve 41 is slidably disposed on the outer periphery of the valve disc 3. Multiple flow control sleeves 41 are provided and slidably disposed relative to each other, and each flow control sleeve 41 is provided with a flow control groove 42. The flow control groove 42 gradually decreases in size from the outermost flow control sleeve 41 to the innermost flow control sleeve 41. When the valve disc 3 drives the flow control sleeves 41 to overlap, the valve disc 3 seals the flow control groove 42. A limiting element is provided on the flow control sleeve 41. Each flow control sleeve 41 is provided with a flow control groove 42, and the size of the control groove gradually decreases from the outermost flow control sleeve 41. In use... The actuator drives the valve disc 3 to move downwards, and the outermost flow control sleeve 41 first comes into contact with the valve body 1. At this time, the fluid in the flow channel 2 is discharged from the flow control groove 42, which is the first flow control compared to the original situation. Then, as the actuator moves downwards, the inner flow control sleeve 41 moves downwards, and the valve disc 3 will seal the outermost flow control groove 42. At this time, the fluid can only flow out from the smaller flow control groove 42, which is the second flow control (flow rate decreases). As the valve disc 3 moves downwards, the valve disc 3 can seal the flow control groove 42 to ensure the shut-off of the valve body 1. Compared with the original direct valve shut-off, this method performs segmented flow control shut-off, which can better shut off the valve and avoid the problem that opening and closing the valve is very laborious under the original high pressure difference or large diameter conditions.

[0025] The limiting component includes a sliding protrusion 5, which is disposed on the outer periphery of the flow control sleeve 41. A sliding groove 51 is formed on the flow control sleeve 41 that slides and engages with the sliding protrusion 5. The sliding protrusion 5 allows the flow control sleeves 41 to slide relative to each other for ease of use, while also limiting the movement between adjacent flow control sleeves 41.

[0026] A first limiting block 52 is formed on the sliding protrusion 5, and the first limiting block 52 protrudes outward from the sliding protrusion 5. A second limiting block 53 is provided at the other end of the sliding protrusion 5, and an inclined surface is formed on the second limiting block 53. The limiting blocks at both ends can limit the flow control sleeve 41 at both ends and prevent the two flow control sleeves 41 from sliding off.

[0027] The limiting component also includes a sealing filler 54, which is disposed in the sliding groove 51 and can seal the sliding groove 51 to ensure no leakage. The sealing filler 54 also has a certain degree of elasticity.

[0028] A limiting part 55 is formed on one end of the flow control sleeve 41 connected to the valve disc 3, facing away from the flow control groove 42. The limiting part 55 has a through hole for the valve stem 31 to pass through, and a sliding gap 56 is formed inside the flow control sleeve 41. The sliding gap 56 is located on the side of the flow control sleeve 41 near the through hole. The limiting part 55 can limit the sliding of the valve disc 3 inside the flow control sleeve 41 and can control the distance between them.

[0029] The valve body 1 has a recessed groove for the valve stem 31 to slide. A retaining groove 7 is formed on one side of the valve stem 31 groove inside the valve body 1. The retaining groove 7 is adapted to the flow control sleeve 41. When the valve stem 31 moves upward, the flow control sleeve 41 separates and sequentially positions itself in the retaining groove 7. Through this design, when the valve stem 31 moves upward, multiple flow control sleeves 41 can be driven to engage within the sliding gap 56, ensuring that several flow control sleeves 41 are separated from the valve disc 3. The flow control sleeves 41, in conjunction with the retaining groove 7, can be separated during opening for convenient valve shut-off in the next operation. The structure is simple and easy to use.

[0030] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A shut-off valve, comprising a valve body, wherein a flow channel is formed within the valve body, and a valve disc is disposed within the valve body for cutting off the flow channel, characterized in that: The valve body is provided with a flow control sleeve, which is slidably disposed on the outer periphery of the valve disc. Multiple flow control sleeves are provided and are slidably disposed on each other. Each flow control sleeve is provided with a flow control groove, which gradually decreases in size from the outermost flow control sleeve to the innermost flow control sleeve. When the valve disc drives the flow control sleeves to overlap, the valve disc seals the flow control groove. A limiting element is provided on the flow control sleeve.

2. A shut-off valve according to claim 1, characterized in that: The limiting member includes a sliding protrusion disposed on the outer periphery of the flow control sleeve, and a sliding groove is formed on the flow control sleeve that slides and engages with the protrusion.

3. A shut-off valve according to claim 2, characterized in that: A first limiting block is formed on the sliding protrusion, the first limiting block protrudes outward from the sliding protrusion, and a second limiting block is provided at the other end of the sliding protrusion, the second limiting block having an inclined surface formed thereon.

4. A shut-off valve according to claim 2, characterized in that: The limiting element also includes a sealing filler, which is disposed within the sliding groove.

5. A shut-off valve according to claim 1, characterized in that: A limiting part is formed on one end of the flow control sleeve that connects to the valve disc, facing away from the flow control groove. A through hole is provided on the limiting part for the valve stem to pass through, and a sliding gap is formed inside the flow control sleeve. The sliding gap is located on the side of the flow control sleeve near the through hole.

6. A shut-off valve according to claim 5, characterized in that: The valve body has a recessed valve stem groove for the valve stem to slide. The valve stem groove is located on one side of the valve body and forms a retaining groove. The retaining groove is adapted to the flow control sleeve. When the valve stem moves upward, the flow control sleeve separates and is located in the retaining groove in sequence.

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