Anti-seismic two-way two-blade zero-leakage rectangular closed valve

Abstract

The utility model discloses an anti-seismic two-way two-blade zero-leakage rectangular closed valve which comprises a frame and two valve plates, the valve plates are installed on the frame through shafts, the valve plates and the shafts are connected through cone-end set screws, deep groove ball bearings are arranged between the shafts and the frame, the number of the valve plates is two, and the valve plates are connected with the frame through cone-end set screws. The shafts are connected through a linkage device matched with a flat end set screw, the end of each shaft is provided with an action mechanism, the valve plate comprises a bottom plate and a pressing plate, and a sealing ring is arranged between the bottom plate and the pressing plate. The sealing ring has the beneficial effects that no matter which side the airflow comes from, the sealing ring can be in close contact with a sealed contact surface, and the sealing performance becomes stronger along with the increase of air pressure; damage caused by overcompression of the sealing ring can be effectively prevented, the bottom plate and the pressing plate are convenient to disassemble and assemble, and the sealing ring is convenient to replace and use. The opening and closing angle of the valve plate can be adjusted through the adjusting rod, the torque requirement of the action mechanism is low, and the occupied space is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation valves, in particular to an earthquake-resistant bidirectional two-leaf zero-leakage rectangular airtight valve. Background Technique

[0002] The zero-leakage airtight valve is the most critical valve in the ventilation isolation system of the nuclear island of a nuclear power plant and is also a barrier to prevent nuclear leakage. When a nuclear safety leakage accident occurs, the zero-leakage airtight valve needs to quickly cut off the air circulation of the pollution source in the ventilation system and isolate the pollution source inside.

[0003] However, in the process of the applicant implementing the technical solution of the utility model in the embodiments of the present application, it is found that the above technology has at least the following technical problems:

[0004] The existing sealing valve can only achieve one-way sealing, and zero leakage cannot be achieved when reverse air flow appears;

[0005] After a long time, the disassembly and replacement of the sealing ring are relatively cumbersome and cannot meet the on-site requirements. When the sealing ring is fixed, it is easy to be damaged due to over-compression;

[0006] When the size of the valve body increases, the torque required for the actuating mechanism becomes larger. In the case of a single leaf without being split into two leaves, it is difficult to accommodate the actuating mechanism with large torque in the installation space. Content of the Utility Model

[0007] The embodiment of the present application provides an earthquake-resistant bidirectional two-leaf zero-leakage rectangular airtight valve, which solves the problem of one-way sealing of the sealing valve in the prior art. The surface of the valve seat in contact with the sealing ring adopts an eccentric spherical head cylinder shape. No matter which side the air flow direction comes from, the sealing ring can form a tight contact with the sealing contact surface. As the air pressure increases, the sealing performance becomes stronger, which can effectively prevent the damage of the sealing ring caused by over-compression, and it is convenient to disassemble and assemble between the bottom plate and the pressing plate, which is convenient for the replacement and use of the sealing ring.

[0008] The embodiment of the present application provides an earthquake-resistant bidirectional two-leaf zero-leakage rectangular airtight valve, including: a frame and a valve plate. It is characterized in that the valve plate is installed on the frame through a shaft, and the valve plate and the shaft are connected by a taper-end set screw. A deep groove ball bearing is arranged between the shaft and the frame. The number of valve plates is two, and the shafts are connected by a linkage device and a flat-end set screw. An actuating mechanism is installed at the end of the shaft. The valve plate includes a bottom plate and a pressing plate, and a sealing ring is arranged between the bottom plate and the pressing plate.

[0009] Further, the frame includes a valve frame and a valve seat. The valve frame and the valve seat are fixedly connected by welding. The surface of the valve seat in contact with the sealing ring is provided with an eccentric spherical head cylinder shape. The valve seat cooperates with the sealing ring, and the end part of the sealing ring is arc-shaped.

[0010] Further, the sealing ring is integrally T-shaped and is arranged between the bottom plate and the pressing plate by embedding. The sealing ring is made of ethylene propylene diene monomer (EPDM) rubber.

[0011] Further, the bottom plate and the pressing plate are fixedly connected by socket head cap screws and limited and fixed by flat end set screws.

[0012] Further, the linkage device includes a coupling member and an adjusting rod. The coupling member and the adjusting rod are movably connected and fixed by a connecting member. The coupling member and the shaft are connected and fixed by a fastening member. The length of the adjusting rod is controlled by rotation.

[0013] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0014] 1. The surface of the valve seat in contact with the sealing ring is in the shape of an eccentric spherical head cylinder, which can achieve two-way sealing. No matter which side the air flow direction comes from, the sealing ring can form a tight contact with the sealing contact surface. As the air pressure increases, the sealing performance becomes stronger.

[0015] 2. The flat end set screw can effectively limit the distance between the bottom plate and the pressing plate, effectively prevent the sealing ring from being damaged due to over-compression, and the bottom plate and the pressing plate are convenient to disassemble and assemble, facilitating the replacement and use of the sealing ring.

[0016] 3. The linkage device can meet the requirement of simultaneous opening and closing between two valve plates. The opening and closing angle of the valve plate can be adjusted by the adjusting rod. The torque requirement of the actuating mechanism is low, reducing the occupied space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the specific structure of the present invention;

[0018] Figure 2 is a half-sectional view of the frame in the present invention;

[0019] Figure 3 is a schematic diagram of the connection structure at the valve plate in the present invention;

[0020] Figure 4 is a schematic diagram of the structure of the linkage device in the present invention;

[0021] Figure 5This is a schematic diagram of the specific structure at the sealing ring in the present utility model. Detailed implementation manners

[0022] To better understand the above technical solution, the following will combine the accompanying drawings of the specification and specific implementation manners to elaborate on the above technical solution in detail. Embodiment

[0023] As shown in the figure, the present invention provides an earthquake-resistant two-leaf zero-leakage rectangular shut-off valve, including: a frame 1 and a valve plate 2. The valve plate 2 is installed on the frame 1 through a shaft 3. A cone-point set screw is used for connection between the valve plate 2 and the shaft 3. A deep groove ball bearing is arranged between the shaft 3 and the frame 1. The number of valve plates 2 is two. A linkage device 4 is used in cooperation with a flat-end set screw for connection between the shafts 3. An operating mechanism 6 is installed at the end of the shaft 3. The valve plate 2 includes a bottom plate 201 and a pressing plate 202, and a sealing ring 5 is arranged between the bottom plate 201 and the pressing plate 202.

[0024] It can be seen from the figure that the overall frame is rectangular. The surface of the frame 1 in contact with the sealing ring 5 is processed by five-axis machining, and the processing area is spherical head cylindrical, which can ensure double-direction zero leakage while reducing the torque required for the rotation of the valve plate; the actions of the valve plates can be made consistent through the linkage device.

[0025] The entire earthquake-resistant two-leaf zero-leakage rectangular shut-off valve is convenient to use, quick to install, simple to disassemble, and easy to maintain. The overall action consistency is good, the structure is compact, the double-direction sealing performance is good, the torque requirement for the operating mechanism is low, the occupied space is small, and the earthquake resistance ability is strong. The on-site vulnerable part, the sealing ring, is convenient to replace. Embodiment

[0026] Combined with Figure 2 and Figure 5 As shown, the frame 1 includes: a valve frame 101 and a valve seat 102. The valve frame 101 and the valve seat 102 are fixedly connected by welding. The surface of the valve seat 102 in contact with the sealing ring 5 is provided with an eccentric spherical head cylinder shape. The valve seat 102 and the sealing ring 5 cooperate with each other. The end part of the sealing ring 5 is arc-shaped. The sealing ring 5 is integrally T-shaped and is arranged between the bottom plate 201 and the pressing plate 202 by embedding. The sealing ring 5 is made of ethylene propylene diene monomer (EPDM) rubber.

[0027] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages:

[0028] By adopting a T-shaped sealing ring 5 with an arc-shaped end, it is not only firmly fixed, but also in close contact with the valve seat 102. The surface of the valve seat 102 in contact with the sealing ring 5 is in the shape of an eccentric spherical head cylinder, which can achieve double-sided sealing. Regardless of the air flow direction from which side, the sealing ring 5 can form a tight contact with the sealing contact surface. As the air pressure increases, the sealing performance becomes stronger. It can greatly reduce the friction coefficient of the sealing ring 5 caused by the rotation of the valve plate 2, and the eccentric structure can facilitate the diversion, reduce the wind resistance, with a fast diversion speed and strong sealing performance. Embodiment

[0029] As Figure 3 and Figure 5 shown, the bottom plate 201 and the pressing plate 202 are fixedly connected by socket head cap screws and limited and fixed by flat end set screws.

[0030] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages:

[0031] The sealing ring 5 can be effectively fixed between the bottom plate 201 and the pressing plate 202 by socket head cap screws, and the distance between the bottom plate 201 and the pressing plate 202 can be effectively limited by flat end set screws. It can effectively prevent the damage of the sealing ring 5 caused by over-compression, and it is convenient to disassemble and assemble between the bottom plate 201 and the pressing plate 202, facilitating the replacement and use of the sealing ring 5. Embodiment

[0032] As Figure 4 shown, the linkage device 4 includes a coupling member 301 and an adjusting rod 302. The coupling member 301 and the adjusting rod 302 are movably connected and fixed by a connecting member. The coupling member 301 is fixedly connected to the shaft 3 by a fastening member, and the adjusting rod 302 controls the length of the adjusting rod 302 by rotation.

[0033] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages:

[0034] Through the linkage device 4, the requirement of simultaneous opening and closing between the two valve plates 2 can be achieved. By adjusting the rod 302, the opening and closing angle of the valve plate 2 can be adjusted. The torque requirement of the actuating mechanism 6 is low, reducing the occupied space.

[0035] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0036] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these modifications and variations.

Claims

1. A two-way two-leaf zero-leakage rectangular sealed valve for earthquake resistance, comprising: Frame and valve plate, characterized in that the valve plate is mounted on the frame through a shaft, and the valve plate and the shaft are connected by a cone-end set screw. A deep groove ball bearing is provided between the shaft and the frame. The number of valve plates is two. The shafts are connected by a linkage device and a flat-end set screw. An actuating mechanism is installed at the end of the shaft. The valve plate includes a bottom plate and a pressing plate, and a sealing ring is provided between the bottom plate and the pressing plate.

2. The anti-seismic two-way two-leaf zero-leakage rectangular closed valve according to claim 1, characterized in that, The frame includes: a valve frame and a valve seat. The valve frame and the valve seat are fixedly connected by welding. The surface of the valve seat in contact with the sealing ring is provided with an eccentric spherical head cylinder shape. The valve seat cooperates with the sealing ring, and the end part of the sealing ring is arc-shaped.

3. A seismic-resistant two-way two-leaf zero-leakage rectangular sealed valve according to claim 1, characterized in that, The sealing ring is integrally T-shaped and is arranged between the bottom plate and the pressing plate by embedding. The sealing ring is made of ethylene propylene diene monomer rubber.

4. A seismic-resistant two-way two-leaf zero-leakage rectangular sealed valve according to claim 1, characterized in that, The bottom plate and the pressing plate are fixedly connected by a cylinder head screw and limited and fixed by a flat-end set screw.

5. The seismic-resistant two-way two-leaf zero-leakage rectangular sealed valve according to claim 1, characterized in that, The linkage device includes a coupling piece and an adjusting rod. The coupling piece and the adjusting rod are movably connected and fixed by a connecting piece. The coupling piece and the shaft are connected and fixed by a fastening piece. The length of the adjusting rod is controlled by rotating the adjusting rod.

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