Gate valve

Abstract

The utility model belongs to the technical field of valves, and discloses a gate valve. The gate valve comprises a valve plate, a baffle assembly and a sealing assembly, a valve port is formed in the valve plate in a penetrating mode, a channel is formed in the valve plate and communicated with the valve port, an insertion opening is formed in the valve plate and communicated with the channel, the baffle assembly is arranged in the channel in a drawable mode through the insertion opening, and the sealing assembly can seal the insertion opening. The baffle assembly is arranged in the channel in a drawable mode through the inserting opening, the position of the baffle assembly is changed by drawing the baffle assembly, the size of the valve port shielded by the baffle assembly can be changed, namely the opening size of the valve port can be changed, and therefore opening and closing of the gate valve and the medium conveying flow can be controlled. After the position of the baffle assembly is adjusted, the sealing assembly is used for sealing the inserting opening, the sealing performance of the gate valve is guaranteed, when the gate valve is connected to a pipeline and used for conveying media, the media cannot leak, and resource waste and environmental pollution are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a knife gate valve. Background Art

[0002] The knife gate valve is also called a manual knife gate valve. Its principle is that a valve port is opened on the valve plate, and a baffle is inserted into the valve plate. The size of the opened valve port can be changed by pulling the baffle. The advantages of the knife gate valve are that there is no groove in the valve body diameter, the medium will not be blocked, and its structure is simple, the operation is convenient, and the maintenance cost is low.

[0003] In the prior art, the sealing performance of the knife gate valve is poor. In many occasions with high sealing requirements, such as in the process of natural gas extraction and transportation, the use of the knife gate valve may cause leakage of natural gas, resulting in problems such as waste of resources and environmental pollution.

[0004] Therefore, it is necessary to provide a knife gate valve to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a knife gate valve, which uses a sealing component to seal the socket to ensure the sealing performance of the knife gate valve and prevent the medium from leaking.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A knife gate valve, comprising:

[0008] A valve plate, which is provided with a valve port running through it, a channel is opened in the valve plate, the channel is communicated with the valve port, a socket is opened on the valve plate, and the socket is communicated with the channel;

[0009] A baffle assembly, which is slidably arranged in the channel through the socket;

[0010] A sealing component, which can seal the socket.

[0011] Preferably, the baffle assembly includes:

[0012] A pull rod, which is inserted into the valve plate through the socket;

[0013] A baffle, which is connected to the pull rod, the baffle is located in the channel, and the baffle can adjust the size of the opened valve port.

[0014] Preferably, the baffle assembly further includes:

[0015] A holding part, which is arranged on the pull rod.

[0016] Preferably, the pull rod is provided with scales.

[0017] Preferably, the plug valve further comprises:

[0018] a sleeve, which is arranged on the valve plate and communicated with the socket, and the baffle assembly is inserted into the sleeve.

[0019] Preferably, the sealing assembly comprises:

[0020] a seal, which is arranged between the baffle assembly and the sleeve.

[0021] Preferably, the sealing assembly further comprises:

[0022] a sealing cap, which is hermetically covered on the sleeve.

[0023] Preferably, the seal is made of rubber.

[0024] Preferably, the plug valve further comprises two flanges, which are respectively arranged on both sides of the valve plate, and the flanges are communicated with the valve port.

[0025] Preferably, the valve plate and the flange are integrally formed.

[0026] Advantages of the present utility model:

[0027] This plug valve comprises a valve plate, a baffle assembly and a sealing assembly. The valve plate is provided with a valve port in a penetrating manner, a channel is arranged in the valve plate, the channel is communicated with the valve port, a socket is arranged on the valve plate, the socket is communicated with the channel, the baffle assembly is slidably arranged in the channel through the socket, and the sealing assembly can seal the socket. The baffle assembly is slidably arranged in the channel through the socket. By pulling the baffle assembly to change the position of the baffle assembly, the size of the baffle assembly covering the valve port can be changed, that is, the size of the opened valve port can be changed, so as to control the opening and closing of the plug valve and the flow rate of the medium transportation; after the position of the baffle assembly is adjusted, the sealing assembly is used to seal the socket, ensuring the sealing performance of the plug valve. When the plug valve is connected to a pipeline for transporting the medium, the medium will not leak, reducing resource waste and environmental pollution. Description of the Drawings

[0028] Figure 1 is a cross-sectional view of the plug valve provided by the present utility model.

[0029] In the figure:

[0030] 1. Valve plate; 11. Valve port; 12. Channel;

[0031] 2. Baffle assembly; 21. Pull rod; 22. Baffle; 23. Holding part;

[0032] 3. Sealing assembly; 31. Seal; 32. Sealing cap;

[0033] 4. Sleeve;

[0034] 5. Flange. Detailed implementation manners

[0035] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0036] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the top", and "on the top" of the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below the bottom", and "under the bottom" of the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0038] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0039] In the prior art, the tightness of the flap valve is relatively poor. In many occasions with high requirements for tightness, such as in the process of natural gas extraction and transportation, the use of the flap valve may cause natural gas leakage, resulting in problems such as resource waste and environmental pollution.

[0040] To solve the above problems, as Figure 1 shown, this embodiment provides a plug valve, which includes a valve plate 1, a baffle assembly 2 and a sealing assembly 3. The valve plate 1 is provided with a valve port 11 through it, and a channel 12 is provided in the valve plate 1. The channel 12 communicates with the valve port 11. An insertion port is provided on the valve plate 1, and the insertion port communicates with the channel 12. The baffle assembly 2 is slidably arranged in the channel 12 through the insertion port, and the sealing assembly 3 can seal the insertion port.

[0041] The baffle assembly 2 is slidably arranged in the channel 12 through the insertion port. By pulling the baffle assembly 2 to change its position, the size of the baffle assembly 2 covering the valve port 11 can be changed, that is, the size of the valve port 11 opened can be changed, so as to control the opening and closing of the plug valve and the flow rate of the medium transportation; after adjusting the position of the baffle assembly 2, the sealing assembly 3 is used to seal the insertion port, ensuring the sealing performance of the plug valve. When the plug valve is connected to a pipeline for transporting the medium, the medium will not leak, reducing resource waste and environmental pollution.

[0042] Specifically, as Figure 1 shown, the baffle assembly 2 includes a pull rod 21 and a baffle 22. The pull rod 21 is inserted into the valve plate 1 through the insertion port, and the baffle 22 is connected to the pull rod 21. The baffle 22 is located in the channel 12, and the baffle 22 can adjust the size of the valve port 11 opened. Through the design of the pull rod 21 and the baffle 22, the operator can conveniently adjust the position of the baffle 22 in the channel 12, thereby accurately controlling the size of the valve port 11 opened, so as to flexibly adjust the passing amount of the medium according to actual needs, realizing refined flow control without complex operation steps or tools.

[0043] In the specific implementation process, the valve plate 1 is composed of two sub-valve plates. Both sub-valve plates are provided with sub-valve ports and sub-channels. The two sub-valve plates are spliced so that the two sub-valve ports are facing each other to form the valve port 11, and the two sub-channels form the channel 12. And the baffle assembly 2 is arranged between the two sub-valve plates, and then the two sub-valve plates are welded. It can be understood that, in order to ensure the sealing performance of the plug valve, the two sub-valve plates are welded in a fully sealed full-weld form to ensure that there is no air leakage at the joint after the two sub-valve plates are spliced.

[0044] Specifically, as Figure 1 shown, the baffle assembly 2 further includes a holding part 23, and the holding part 23 is arranged on the pull rod 21. The existence of the holding part 23 enables the operator to directly control the pull rod 21 through hand movements, and can maintain a comfortable hand posture during operation, reducing hand fatigue and labor intensity.

[0045] In some embodiments, the holding part 23 is made of a non-slip material, such as rubber, to ensure that the operator can still maintain a stable holding force in a wet or oily environment.

[0046] Specifically, there are scales provided on the pull rod 21. The scales provide an intuitive reference, enabling the operator to accurately adjust the position of the pull rod 21, thereby precisely controlling the moving distance of the baffle 22 within the channel 12, and further regulating the opening size of the valve port 11, eliminating the need for repeated trial - and - error or relying on empirical judgment, thus saving the adjustment time and improving the work efficiency.

[0047] In this embodiment, as Figure 1 shown, the plug valve further includes a sleeve 4. The sleeve 4 is arranged on the valve plate 1 and communicates with the socket. The baffle assembly 2 is inserted into the sleeve 4. The design of the sleeve 4 can ensure that the baffle assembly 2 maintains stable contact with the baffle 22 during movement, providing guidance and support for the movement of the baffle assembly 2, making the baffle 22 more stable during movement.

[0048] Specifically, as Figure 1 shown, the sealing assembly 3 includes a seal 31. The seal 31 is arranged between the baffle assembly 2 and the sleeve 4. The seal 31 can closely fit between the baffle assembly 2 and the sleeve 4, effectively filling the tiny gaps between them, thereby preventing the medium from leaking through these gaps. In this embodiment, the seal 31 is arranged between the pull rod 21 and the sleeve 4, and the seal 31 is an O - ring.

[0049] In this embodiment, the material of the seal 31 is rubber. The rubber material has excellent elasticity and resilience, can closely fit on the baffle assembly 2 and the sleeve 4, effectively isolating the medium to prevent leakage; and the rubber material has excellent wear - resistance, oxidation - resistance and corrosion - resistance properties, and can be used for a long time in various harsh environments. In other embodiments, the material of the seal 31 can also be polytetrafluoroethylene, polyurethane, etc., which is not limited in this embodiment.

[0050] Specifically, as Figure 1 shown, the sealing assembly 3 further includes a sealing cap 32. The sealing cap 32 is hermetically covered on the sleeve 4. Adding the sealing cap 32 on the basis of the sleeve 4 forms a double - sealing structure, which can more effectively prevent the medium from leaking through the gap between the sleeve 4 and the baffle assembly 2, improving the overall sealing performance. During the specific implementation process, the sealing cap 32 is sleeved on the pull rod 21.

[0051] In this embodiment, the material of the sealing cap 32 is rubber. The rubber material has excellent elasticity and resilience, can closely fit on the sleeve 4, effectively isolating the medium to prevent leakage; and the rubber material has excellent wear - resistance, oxidation - resistance and corrosion - resistance properties, and can be used for a long time in various harsh environments. In other embodiments, the material of the sealing cap 32 can also be polytetrafluoroethylene, polyurethane, etc., which is not limited in this embodiment.

[0052] Specifically, as Figure 1As shown in the figure, the knife gate valve further includes two flanges 5, which are respectively arranged on both sides of the valve plate 1, and the flanges 5 communicate with the valve port 11. The two flanges 5 are respectively located on both sides of the valve plate 1. When the knife gate valve is connected to the pipeline system, the flanges 5 can be connected to the pipeline through fastening bolts, making the connection between the knife gate valve and the pipeline faster and more secure; the flanges 5 enable the knife gate valve to maintain the structural stability when bearing the pressure of the medium inside the pipeline. The flanges 5 on both sides of the valve plate 1 serve as support points, dispersing the pressure of the medium on the valve plate 1 and improving the pressure-bearing capacity of the knife gate valve.

[0053] In this embodiment, the valve plate 1 and the flanges 5 are integrally formed. The integral formation of the valve plate 1 and the flanges 5 eliminates the possible gaps and joint surfaces in the traditional connection method, thereby reducing the risk of medium leakage, providing a better sealing effect, and ensuring that the knife gate valve can maintain a stable sealing performance. Specifically, the two flanges 5 are integrally formed with the two sub-valve plates respectively.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A gate valve, characterized in that: include: A valve plate (1), wherein the valve plate (1) is provided with a valve port (11) extending therethrough, wherein a channel (12) is provided in the valve plate (1), wherein the channel (12) is communicated with the valve port (11), and wherein a socket is provided on the valve plate (1), wherein the socket is communicated with the channel (12); a baffle assembly (2), the baffle assembly (2) being drawably disposed in the channel (12) through the socket; A sealing component (3), wherein the sealing component (3) is capable of sealing the socket.

2. The gate valve according to claim 1, characterized in that: The baffle assembly (2) comprises: A pull rod (21), wherein the pull rod (21) is inserted into the valve plate (1) through the socket; A baffle (22), the baffle (22) is connected to the pull rod (21), the baffle (22) is located in the channel (12), and the baffle (22) can adjust the size of the opening of the valve port (11).

3. The gate valve according to claim 2, characterized in that: The baffle assembly (2) further comprises: A gripping portion (23), wherein the gripping portion (23) is arranged on the pull rod (21).

4. The gate valve according to claim 2, characterized in that: The pull rod (21) is provided with a scale.

5. The gate valve according to claim 1, characterized in that: The gate valve also includes: A sleeve (4), the sleeve (4) is arranged on the valve plate (1) and is communicated with the socket, and the baffle assembly (2) is inserted into the sleeve (4).

6. The gate valve according to claim 5, characterized in that: The sealing assembly (3) comprises: A sealing member (31), wherein the sealing member (31) is arranged between the baffle assembly (2) and the sleeve (4).

7. The gate valve according to claim 6, characterized in that: The sealing assembly (3) further comprises: A sealing cap (32), wherein the sealing cap (32) is sealingly covered and arranged on the sleeve (4).

8. The gate valve according to claim 6, characterized in that: The sealing member (31) is made of rubber.

9. The gate valve according to any one of claims 1 to 8, characterized in that: The gate valve further comprises two flanges (5), the two flanges (5) being respectively arranged on both sides of the valve plate (1), and the flanges (5) being communicated with the valve port (11).

10. The gate valve according to claim 9, characterized in that: The valve plate (1) and the flange (5) are integrally formed.

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