A quick-change blind plate valve convenient to maintain

Abstract

This utility model relates to the field of pipeline shut-off technology, specifically to a quick-cut blind valve that is easy to maintain. It includes a left valve body, with a right valve body located on the right side of the left valve body. The left and right valve bodies are connected by a clamping double-ended bolt. A blocking assembly is disposed inside the left valve body, comprising a valve plate made of aerospace-grade aluminum alloy. The surface of the valve plate has a shaped groove, the inner wall of which is fitted with a sealing ring. By using a shaped groove to embed the sealing ring, the problem of O-rings falling off due to adhesion is avoided, while overcoming the difficulty of replacing vulcanized rubber rings. The contact between the sealing ring and the inner wall of the left valve body enhances the media blocking effect. Simultaneously, the shaped groove structure mechanically limits the sealing ring, maintaining stable sealing performance even under high-temperature conditions. The modular design allows for individual replacement of the sealing ring without disassembling the entire valve.

Description

Technical Field

[0001] This utility model relates to the field of pipeline shut-off technology, and more specifically, to a quick-cut blind valve that is easy to maintain. Background Technology

[0002] Quick-cut blind flanges are a new type of reliable shut-off device that enables safe, rapid, and convenient replacement of blind flanges in pipeline shut-off, isolation, and maintenance processes. They have a wide range of applications, covering gas pipelines such as water, steam, air, and natural gas, as well as feed pipelines, transfer depots / pump stations, feeding pipelines, reactor feed pipelines, gas pipelines in metallurgical blast furnace systems, and flare systems in industries such as petroleum, chemical, and steel. They play a significant role in equipment maintenance, pipeline switching, media isolation, preventing media leakage, protecting personnel safety, and reducing environmental pollution.

[0003] Quick-cut blind flanges are mainly used in pipeline systems. When equipment maintenance, pipeline switching, media isolation, and other operations are required, the pipeline is cut off and opened by pushing and pulling the valve plate. Under normal working conditions, the sealing ring on the valve plate plays a sealing role to prevent media leakage. When operation is required, the valve plate is pushed and pulled to change its position, thereby completing the pipeline cut-off or connection.

[0004] Considering that the valve plate sealing ring often comes off during the push-pull operation, and that the push-pull operation is laborious and inflexible, when the valve leaks, the internal sealing ring needs to compress the valve body. If the valve body is too long to connect to the pipeline or the pipeline is not concentric, the seal cannot be adjusted by compressing the valve body. In this case, the internal sealing ring either cannot function properly or the entire valve must be disassembled for replacement, which is very troublesome. Moreover, the two types of valve plate sealing rings each have their drawbacks. The first type uses standard O-rings. After the valve is pressure tested, the O-rings adhere to the valve plate and will fall off directly when the valve plate is pushed or pulled. In addition, because high-temperature conditions are sometimes required, no adhesive can solve this problem. The second type uses vulcanized rubber rings. When adhesives cannot solve the problem, the rubber rings will be vulcanized onto the valve plate. However, in this case, the downtime during on-site maintenance is very long. A new valve needs to be made and delivered to the site before the original valve can be removed, which will cause significant downtime losses for the customer. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned shortcomings and provide a quick-cut blind valve that is easy to maintain;

[0006] To achieve the above objectives, this utility model provides a quick-cut blind valve that is easy to maintain, including a left valve body, and a right valve body is provided on the right side of the left valve body. The left valve body and the right valve body are connected by clamping double-ended bolts.

[0007] The left valve body is provided with a blocking component inside. The blocking component includes a valve plate. The valve plate is made of aviation aluminum alloy. The surface of the valve plate is provided with an irregular groove. The inner wall of the irregular groove is fitted with a sealing ring. The sealing ring is an irregular structure. Its shape is adapted to the irregular groove on the surface of the valve plate. The sealing ring is a self-tightening expansion type irregular ring.

[0008] The valve plate is provided with a connecting assembly, the connecting assembly including a valve seat, and an O-ring is embedded in the inner wall of the valve seat;

[0009] The left and right valve bodies, as the main structure of the quick-cut blind flange, are securely connected by clamping double-ended bolts, forming the basic framework of the pipeline passage. The valve plate in the blocking assembly is the core component for pipeline shut-off and flow control. Made of aerospace-grade aluminum alloy, it boasts high strength, can withstand medium pressure and pushing / pulling forces, and is not easily deformed or damaged. Its lightweight nature also makes pushing / pulling operations more convenient and effortless. The irregular grooves on the valve plate surface are used to embed sealing rings. The irregularly shaped sealing rings fit the grooves and are self-tightening and expanding. As the medium pressure increases, they expand, enhancing the tightness of the fit with the inner wall of the groove and the left valve body, reducing the risk of detachment. This avoids the problem of traditional O-rings sticking and falling off, overcomes the difficulty of replacing vulcanized rubber rings, and maintains stable sealing performance under high-temperature conditions.

[0010] As a further improvement to this technical solution, the valve plate has a groove on its surface, and a fireproof ring is fitted on the inner wall of the groove. The ring expands under high temperature conditions to enhance the sealing performance and prevent media leakage.

[0011] When performing pipeline shut-off or isolation operations in high-temperature environments, the fireproof ring will expand due to the increase in temperature. The expanded fireproof ring can further fill the gap between the valve plate and the inner walls of the left and right valve bodies.

[0012] As a further improvement to this technical solution, the connecting assembly also includes a valve seat washer that fits against the surface of the valve seat, a pressure ring that is fixedly connected to the end of the valve seat, the pressure ring being used to fix and press the valve seat washer, a pull plate that is fixedly connected to the surface of the valve seat, and a handle that is fixedly connected to the surface of the pull plate.

[0013] The pressure ring is fixedly connected to the end of the valve seat. Its core function is to reliably compress the valve seat gasket. It restricts the displacement of the valve seat gasket through mechanical force, preventing it from falling off due to medium pressure or valve plate movement during the operation of the quick-cut blind flange. This ensures that the valve seat gasket is always tightly fitted to the valve seat, guaranteeing the stability of the seal.

[0014] When the O-ring on the inner wall of the valve seat needs to be replaced, the operator first loosens the clamping double-ended bolts to release the tight connection between the left and right valve bodies. By pulling the handle, the pull plate can be driven to pull the valve seat out from the inside of the left valve body, which greatly simplifies the O-ring replacement process and shortens the maintenance time.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This easy-to-maintain quick-cut blind valve employs a shaped groove embedded sealing ring, avoiding the problem of O-rings falling off due to adhesion, while overcoming the difficulty of replacing vulcanized rubber rings. The contact between the sealing ring and the inner wall of the left valve body enhances the media blocking effect. At the same time, the shaped groove structure provides mechanical restraint for the sealing ring, maintaining stable sealing performance even under high-temperature conditions. The modular design allows for individual replacement of the sealing ring without disassembling the entire valve, solving the maintenance problem of long pipelines with misalignment. The non-vulcanized sealing ring installation method shortens on-site maintenance downtime, and the clamping double-headed bolt connection structure enables rapid disassembly of the valve body, facilitating the inspection of internal components. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the clamping double-headed bolt structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the handle structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the O-ring structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the valve plate structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the valve seat structure of this utility model;

[0023] The meanings of the labels in the diagram are as follows:

[0024] 10. Left valve body; 11. Right valve body; 12. Clamping double-ended bolt;

[0025] 21. Barrier assembly; 22. Valve plate; 23. Sealing ring; 24. Fireproof ring;

[0026] Connection components; 31. Valve seat; 32. O-ring; 33. Valve seat gasket; 34. Pressure ring; 35. Pull plate;

[0027] handle. Detailed Implementation

[0028] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0029] Please see Figures 1-6 As shown, this embodiment provides a quick-cut blind valve that is easy to maintain, including a left valve body 1, and a right valve body 10 is provided on the right side of the left valve body 1. The left valve body 1 and the right valve body 10 are connected by a clamping double-ended bolt 11.

[0030] The left valve body 1 is provided with a blocking component 2. The blocking component 2 includes a valve plate 21. The surface of the valve plate 21 is provided with a shaped groove, and the inner wall of the shaped groove is fitted with a sealing ring 22.

[0031] A connecting component 3 is provided on the surface of the valve plate 21. The connecting component 3 includes a valve seat 31, and an O-ring 32 is embedded in the inner wall of the valve seat 31.

[0032] In the initial state, the left valve body 1 and the right valve body 10 are securely connected by clamping double-ended bolts 11, forming a complete pipeline passage. When pipeline closure or isolation is required, the valve plate 21 is moved by external force. During the movement, the valve plate 21 moves within the space inside the left valve body 1 until it completely blocks the passage between the left valve body 1 and the right valve body 10. At this time, the sealing ring 22 on the valve plate 21 fits tightly with the valve seat 31, and the cooperation of the two enhances the sealing effect, effectively blocking the medium in the pipeline and completing the closure or isolation action. When it is necessary to restore pipeline flow, the valve plate 21 is moved again, causing it to leave the blocking position and return to the initial non-blocking state. At this time, the medium in the pipeline can smoothly pass through the passage formed by the left valve body 1 and the right valve body 10, restoring normal flow.

[0033] The improvement in this embodiment is as follows:

[0034] Considering that the valve plate 21 sealing ring 22 often comes off during the pushing and pulling process, and that the pushing and pulling operation is laborious and inflexible, when the valve leaks, the internal sealing ring 22 needs to compress the valve body. If the connection length between the valve body and the pipeline is too long or the pipeline is not concentric, the seal cannot be adjusted by compressing the valve body. In this case, the internal sealing ring 22 either cannot function properly or the entire valve must be disassembled for replacement, which is very troublesome. Moreover, the two forms of valve plate 21 sealing ring 22 each have their drawbacks. The first type uses a standard O-ring 32. After the valve is pressure tested, because the O-ring 32 is adhered to the valve plate 21, the O-ring 32 will directly fall off when the valve plate 21 is pushed and pulled. In addition, because high-temperature conditions are sometimes required, no adhesive can solve this problem. The second type uses a vulcanized rubber ring. When the adhesive cannot solve the problem, the rubber ring will be vulcanized. The valve is mounted on the valve plate 21. However, in this case, the downtime during on-site maintenance is very long. A new valve needs to be made and delivered to the site before the original valve can be removed, which will cause significant downtime losses for the customer. Therefore, by using a special groove embedded sealing ring 22, the problem of O-ring 32 falling off due to adhesion is avoided. At the same time, the defect of difficult replacement of vulcanized rubber rings is overcome. The contact between the sealing ring 22 and the inner wall of the left valve body 1 enhances the media blocking effect. Meanwhile, the special groove structure forms a mechanical limit for the sealing ring 22, maintaining stable sealing performance under high temperature conditions. The modular design allows the sealing ring 22 to be replaced separately without disassembling the entire valve, solving the maintenance problem of long pipelines with misalignment. The non-vulcanized sealing ring 22 installation method shortens the on-site maintenance downtime. The clamping double-headed bolt 11 connection structure enables rapid disassembly of the valve body, facilitating the inspection of internal components.

[0035] The sealing ring 22 is designed with an irregular shape that matches the irregular groove on the surface of the valve plate 21. The sealing ring 22 is a self-tightening expansion type irregular ring. During operation, as the medium pressure increases, the self-tightening expansion type irregular ring will expand accordingly, thereby further enhancing the tightness of the fit between the ring and the inner wall of the irregular groove and the valve seat 31, thus reducing the risk of detachment and achieving the effect that the greater the pressure, the less likely it is to detach.

[0036] To enable the blocking component 2 to be used in high-temperature environments, a groove is provided on the surface of the valve plate 21, and a fireproof ring 23 is fitted inside the groove. Under high-temperature conditions, the fireproof ring expands to enhance the sealing performance and prevent media leakage. The fireproof ring 23 is made of flexible graphite. When it is necessary to cut off or isolate the pipeline under high-temperature conditions, the valve plate 21 is moved in the internal space of the left valve body 1 by external force until the channel between the left valve body 1 and the right valve body 10 is completely blocked. At this time, the fireproof ring 23 in the groove of the valve plate 21 will expand due to the increase in temperature. The expanded fireproof ring 23 can further fill the gap and work together with the sealing ring 22 and O-ring 32 to greatly enhance the sealing performance.

[0037] The valve plate 21 is made of aerospace aluminum alloy. Aerospace aluminum alloy has high strength, which can meet the structural strength requirements of the quick-cut blind flange during operation. When subjected to the pressure of the medium and the force brought by the push-pull operation, it is not easy to deform or be damaged, ensuring the stable operation of the valve plate 21 and extending its service life. At the same time, aerospace aluminum alloy is relatively lightweight, which makes the weight of the valve plate 21 relatively lighter. When pushing and pulling the valve plate 21 to perform pipeline closure, isolation and conduction operations, it can effectively reduce the required pushing or pulling force, improve the problem of traditional quick-cut blind flange push-pull valve plate 21 being laborious and not flexible enough, making the operation more convenient and labor-saving, and improving work efficiency.

[0038] The connecting assembly 3 also includes a valve seat gasket 33 that fits against the surface of the valve seat 31;

[0039] A pressure ring 34 is fixedly connected to the end of the valve seat 31. The pressure ring 34 is used to fix and press the valve seat gasket 33.

[0040] In the initial state, the left valve body 1 and the right valve body 10 are firmly connected by clamping double-ended bolts 11, and the valve seat gasket 33 on the surface of the valve seat 31 is tightly fitted to the valve seat 31 under the pressing action of the pressure ring 34.

[0041] A pull plate 35 is fixedly connected to the surface of the valve seat 31, and a handle 4 is fixedly connected to the surface of the pull plate 35. When the O-ring 32 needs to be replaced due to detachment, first loosen the clamping double-ended bolt 11 to release the tight connection between the left valve body 1 and the right valve body 10. Then, the operator pulls the handle 4, which drives the pull plate 35 fixedly connected to it. The pull plate 35 then pulls the valve seat 31 fixedly connected to it out from inside the left valve body 1. After the valve seat 31 is pulled out, the operator can directly replace the O-ring 32 on its surface.

[0042] In practical use, this easy-to-maintain quick-cut blind valve allows for pipeline shut-off or isolation operations. The valve plate 21 is moved within the left valve body 1 by driving the handwheel. Due to the lightweight nature of the aerospace-grade aluminum alloy, the pushing and pulling process is more convenient and effortless. The valve plate 21 completely blocks the passage between the left and right valve bodies 10. When performing shut-off or isolation operations under high-temperature conditions, after the valve plate 21 reaches the blocking position, the fireproof ring 23 within its surface groove expands due to the increased temperature. This expansion, combined with the sealing ring 22 and O-ring 32, significantly enhances the sealing performance. To prevent leakage of high-temperature media, the special groove structure ensures that the sealing ring 22 maintains stable sealing performance at high temperatures. If the O-ring 32 needs to be replaced due to detachment, first loosen the clamping double-ended bolt 11 to release the tight connection between the left valve body 1 and the right valve body 10. The operator pulls the handle 4, which drives the pull plate 35, and then pulls the valve seat 31 out from the inside of the left valve body 1 to directly replace the O-ring 32. After replacement, push the valve seat 31 back to its original position using the handle 4 and the pull plate 35, retighten the clamping double-ended bolt 11, restore the valve body connection, and it can be used again.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A quick-cut blind valve that is easy to maintain, comprising a left valve body (1), characterized in that: A right valve body (10) is provided on the right side of the left valve body (1), and the left valve body (1) and the right valve body (10) are connected by clamping double-headed bolts (11); The left valve body (1) is provided with a blocking component (2), which includes a valve plate (21). The surface of the valve plate (21) is provided with a shaped groove, and the inner wall of the shaped groove is fitted with a sealing ring (22). The surface of the valve plate (21) is provided with a connecting assembly (3), the connecting assembly (3) includes a valve seat (31), and an O-ring (32) is embedded in the inner wall of the valve seat (31).

2. The easy-to-maintain quick-cut blind valve according to claim 1, characterized in that: The sealing ring (22) is designed with an irregular shape that matches the irregular groove on the surface of the valve plate (21), and the sealing ring (22) is a self-tightening expansion type irregular ring.

3. The easy-to-maintain quick-cut blind valve according to claim 1, characterized in that: The valve plate (21) has a groove on its surface, and a fireproof ring (23) is fitted on the inner wall of the groove. It expands under high temperature conditions to enhance the sealing performance and prevent media leakage.

4. The easy-to-maintain quick-cut blind valve according to claim 1, characterized in that: The valve plate (21) is made of aviation aluminum alloy.

5. The easy-to-maintain quick-cut blind valve according to claim 1, characterized in that: The connecting assembly (3) also includes a valve seat gasket (33) that fits onto the surface of the valve seat (31).

6. The easy-to-maintain quick-cut blind valve according to claim 5, characterized in that: A pressure ring (34) is fixedly connected to the end of the valve seat (31), and the pressure ring (34) is used to fix and press the valve seat gasket (33).

7. The easy-to-maintain quick-cut blind valve according to claim 1, characterized in that: A pull plate (35) is fixedly connected to the surface of the valve seat (31), and a handle (4) is fixedly connected to the surface of the pull plate (35).

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