CN-224214723-U - Gate valve capable of preventing abnormal boosting of middle cavity

Abstract

The utility model discloses a gate valve capable of preventing abnormal boosting of a middle cavity, which is characterized by further comprising an automatic pressure relief device arranged on a valve clack, a pressure sensor arranged in the middle cavity and used for monitoring the pressure of the middle cavity in real time, and a display device connected with the pressure sensor; through the arrangement of the automatic pressure relief device, when the pressure in the middle cavity is abnormal, the medium pressure pushes the pressure relief valve core, the pressure relief valve core pushes the spring to discharge the medium from the pressure relief hole, and when the pressure in the middle cavity is normal, the spring is reset, the pressure relief valve core is pushed to press the pressure relief hole, sealing is kept, and the automatic pressure relief device has simple structure and easy maintenance and has obvious pressure relief effect.

Inventors

• CHEN ANJIANG
• PAN WEIJIE
• GAO XIANG
• ZHANG HAIGANG
• WANG DONG
• LI ZHEN
• LOU FENG
• ZHANG CONG
• LI HUAIYING

Assignees

• 杭州富尚阀门有限公司

Dates

Publication Date

20260508

Application Date

20250509

Claims (7)

1. 1. The gate valve capable of preventing abnormal boosting of the middle cavity comprises a valve body (1), a valve seat (2) arranged in the valve body (1), a middle cavity (3) arranged on a longitudinal axis of the valve body (1), a valve clack (4) arranged in the middle cavity (3), a valve rod (5) connected with the valve clack (4), a support (6) arranged on the valve body (1) and an actuating mechanism (7) arranged on the support (6) and connected with the valve rod (5), and is characterized by further comprising an ejector pin (8) arranged in the valve clack (4) and connected with the valve rod (5), an automatic pressure relief device (9) arranged on the valve clack (4), a pressure sensor (10) arranged in the middle cavity (3) and connected with the pressure sensor (10) and used for displaying a pressure value, wherein the automatic pressure relief device (9) comprises a locking block (92) arranged in the pressure relief hole (91) and connected with the valve clack (4), a spring (93) connected with one end of the locking block (92) and a spring (93) connected with the valve core (93).
2. 2. The gate valve for preventing abnormal boosting of middle cavity according to claim 1, wherein a through hole (921) is arranged on the locking block (92).
3. 3. The gate valve capable of preventing abnormal boosting of the middle cavity according to claim 1 is characterized in that a valve cover (11) connected with a valve rod (5) is arranged on the valve body (1).
4. 4. The gate valve for preventing abnormal boosting of the middle cavity according to claim 3, wherein a gasket (12), a compression ring (13) and a supporting plate (14) are arranged between the valve cover (11) and the inner wall of the valve body (1) from bottom to top.
5. 5. The gate valve for preventing abnormal pressure rise of middle cavity according to claim 4, wherein a packing (15) and a packing pressing plate (16) connected with the packing (15) are arranged between the valve cover (11) and the valve rod (5).
6. 6. The gate valve for preventing abnormal boosting of middle cavity according to claim 5, wherein a pressing plate (17) is arranged on the packing pressing plate (16).
7. 7. The gate valve for preventing abnormal boosting of a middle cavity according to claim 1, wherein the actuating mechanism (7) comprises an electric actuating mechanism or a manual actuating mechanism.

Description

Gate valve capable of preventing abnormal boosting of middle cavity Technical Field The utility model relates to the technical field of valves, in particular to a gate valve capable of preventing abnormal boosting of a middle cavity. Background The gate valve is a common cut-off valve which is widely applied to various fluid pipeline systems, under the closed state, the conventional gate valve is blocked, the pressure of a cavity in a valve body is abnormally increased due to medium temperature change or external environmental factors, so that the valve cannot be opened to cause potential safety hazards such as valve sealing failure, valve body deformation and even burst. Disclosure of utility model The utility model aims to provide a method for effectively solving the problems in the background art. The technical scheme adopted by the utility model is that the gate valve for preventing abnormal boosting of the middle cavity comprises a valve body, a valve seat arranged in the valve body, the middle cavity arranged on the longitudinal axis of the valve body, a valve clack arranged in the middle cavity, a valve rod connected with the valve clack, a bracket arranged on the valve body and an actuating mechanism arranged on the bracket and connected with the valve rod, and is characterized by further comprising an ejector pin arranged in the valve clack and connected with the valve rod, an automatic pressure relief device arranged on the valve clack, a pressure sensor arranged in the middle cavity and used for monitoring the pressure of the middle cavity in real time, and a display device connected with the pressure sensor and used for displaying the pressure value; the automatic pressure relief device comprises a pressure relief hole formed in the valve clack, a locking block arranged in the pressure relief hole and connected with the valve clack, a spring connected with one end of the locking block, and a pressure relief valve core connected with the spring and used for pressure relief. Preferably, the locking block is provided with a through hole. Preferably, the valve body is provided with a valve cover connected with the valve rod. Preferably, a gasket, a compression ring and a supporting plate are arranged between the valve cover and the inner wall of the valve body from bottom to top. Preferably, a packing is arranged between the valve cover and the valve rod, and a packing pressing plate connected with the packing is arranged between the valve cover and the valve rod. Preferably, the packing pressing plate is provided with a pressing plate. Preferably, the actuator comprises an electric actuator or a manual actuator. The valve seat pressure relief device has the advantages that due to the arrangement of the ejector pin, large sealing pressure and friction force can exist between the valve clack and the valve seat in a valve clack closing state, the valve clack is difficult to lift from the valve seat, or the valve clack is blocked under the working conditions of high temperature, high pressure and particulate matters contained in media, the ejector pin ejects the valve clack from the valve seat through mechanical acting force, so that the valve clack is separated from the valve seat, friction force when the valve is opened is reduced, operation is easier, the service life of the valve is prolonged, when the valve clack is closed, the ejector pin can ensure uniform contact between the valve clack and the valve seat, the problem of sealing inaccuracy caused by inclination or deflection of the valve clack is avoided, the valve clack is better attached to the valve seat, sealing performance of the valve is improved, the pressure in a middle cavity can be monitored in real time through the arrangement of the pressure sensor and the display device, measures are conveniently taken when the pressure value in the middle cavity exceeds a set value, the service life of the valve is prolonged, the pressure sensor can be transmitted to the display device through signals, the display device can be a mobile phone or a computer, the pressure relief device is easy to operate, the pressure is pushed by the automatic device, the pressure is pushed by the middle cavity, the pressure is pushed by the pressure sensor, the pressure is pushed out of a pressure relief device, and a pressure relief hole is kept normally, and a pressure relief structure is compressed by a pressure release device, and a pressure release device is well is stressed, and a pressure release device is well, and a pressure device is well stressed. Drawings FIG. 1 is a schematic view of the overall structure of the present utility model; fig. 2 is an enlarged view of a portion of the present utility model. The illustration is 1, a valve body, 2, a valve seat, 3, a middle cavity, 4, a valve clack, 5, a valve rod, 6, a bracket, 7, an actuating mechanism, 8, an ejector pin, 9, an automatic pressure relief device, 91, a pressure relief hole, 92, a locking bl