Gate valve for preventing abnormal pressure rise of middle cavity
By introducing a top-out pin, an automatic pressure relief device, and a pressure sensor display device into the gate valve, the problem of abnormal pressure rise in the gate valve cavity is solved, enabling easy opening, automatic pressure relief, and real-time monitoring, thereby improving the sealing performance and service life of the gate valve.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU FUSHANG VALVE CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-05-08
AI Technical Summary
Traditional gate valves can become stuck or experience abnormal pressure increases in the valve body cavity due to changes in medium temperature or external environmental factors when closed, posing a safety hazard. Furthermore, existing pressure relief devices are complex in structure and have unsatisfactory effects.
A gate valve is designed, including an ejector pin, an automatic pressure relief device, a pressure sensor, and a display device. The ejector pin is used to reduce the friction between the valve disc and the valve seat. The automatic pressure relief device is used to automatically relieve pressure when the pressure is abnormal. The pressure sensor and display device are used to monitor and display the pressure in the cavity in real time.
It effectively reduces the friction between the valve disc and the valve seat, prevents jamming, achieves automatic pressure relief, improves the sealing performance and service life of the gate valve, and increases the safety and convenience of operation by monitoring and displaying pressure values in real time.
Smart Images
Figure CN224214723U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve technology, specifically to a gate valve that prevents abnormal pressure rise in the cavity. Background Technology
[0002] Gate valves are a common type of shut-off valve, widely used in various fluid pipeline systems. Traditional gate valves, when closed, can become stuck due to changes in medium temperature or external environmental factors, leading to abnormal pressure increases in the valve body cavity. This can cause valve sealing failure, valve body deformation, or even bursting, posing safety hazards. While some existing gate valves incorporate pressure relief devices, their complex structures and ineffective pressure relief fail to effectively address the problem of abnormal pressure rise in the cavity. Furthermore, the pressure within the valve body is unknown, hindering timely pressure release. Therefore, a gate valve designed to prevent abnormal pressure rise in the cavity is proposed. Utility Model Content
[0003] The main purpose of this utility model is to provide a solution that can effectively address the problems in the background art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a gate valve for preventing abnormal pressure rise in the central cavity, comprising a valve body, a valve seat disposed within the valve body, a central cavity disposed on the longitudinal axis of the valve body, a valve disc disposed within the central cavity, a valve stem connected to the valve disc, a bracket disposed on the valve body, and an actuator disposed on the bracket and connected to the valve stem. The valve is characterized by further comprising a push-out pin disposed within the valve disc and connected to the valve stem, an automatic pressure relief device disposed on the valve disc, a pressure sensor disposed within the central cavity for real-time monitoring of the central cavity pressure, and a display device connected to the pressure sensor for displaying the pressure value. The automatic pressure relief device includes a pressure relief hole disposed on the valve disc, a locking block disposed within the pressure relief hole and connected to the valve disc, a spring connected to one end of the locking block, and a pressure relief valve core connected to the spring for pressure relief.
[0005] Preferably, the locking block is provided with a through hole.
[0006] Preferably, the valve body is provided with a valve cover that is connected to the valve stem.
[0007] Preferably, a gasket, a pressure ring, and a support plate are provided between the valve cover and the inner wall of the valve body from bottom to top.
[0008] Preferably, the valve cover and valve stem are provided with packing material and a packing pressure plate connected to the packing material.
[0009] Preferably, the packing pressure plate is provided with a pressure plate.
[0010] Preferably, the actuator includes an electric actuator or a manual actuator.
[0011] This invention has the following beneficial effects: By using the ejector pin, when the valve disc is closed, there may be significant sealing pressure and friction between the valve disc and the valve seat, making it difficult to lift the valve disc from the valve seat, or causing the valve disc to jam under conditions of high temperature, high pressure, or media containing particulate matter. The ejector pin, through mechanical force, lifts the valve disc from the valve seat, separating the valve disc from the valve seat, thereby reducing friction when opening the valve, making operation easier, and extending the service life of the gate valve. When the valve disc is closed, the ejector pin ensures uniform contact between the valve disc and the valve seat, avoiding sealing problems caused by valve disc tilting or offset, allowing the valve disc to better fit the valve seat, thus… Improve the sealing performance of gate valves; with the installation of pressure sensors and display devices, the pressure in the cavity can be monitored in real time, facilitating operators to take measures when the pressure in the cavity exceeds the set value, thus increasing the service life of the gate valve. The pressure sensor can transmit the pressure value to the display device, which can be a mobile phone or computer. With the installation of an automatic pressure relief device, when the cavity pressure is abnormal, the medium pressure pushes the pressure relief valve core, and the pressure relief valve core pushes the spring to discharge the medium from the pressure relief hole. When the cavity pressure is normal, the spring returns to its original position, pushing the pressure relief valve core to press the pressure relief hole tightly to maintain a seal. The automatic pressure relief device has a simple structure, is easy to maintain, and has a significant pressure relief effect. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0013] Figure 2 This is a partial enlarged view of the present invention.
[0014] Legend: 1. Valve body; 2. Valve seat; 3. Middle cavity; 4. Valve disc; 5. Valve stem; 6. Bracket; 7. Actuator; 8. Ejector pin; 9. Automatic pressure relief device; 91. Pressure relief hole; 92. Locking block; 921. Through hole; 93. Spring; 94. Pressure relief valve core; 10. Pressure sensor; 11. Valve cover; 12. Gasket; 13. Pressure ring; 14. Support plate; 15. Packing; 16. Packing pressure plate; 17. Pressure plate. Detailed Implementation
[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0016] like Figure 1-2As shown, a gate valve for preventing abnormal pressure rise in the central cavity includes a valve body 1, a valve seat 2 disposed within the valve body 1, a central cavity 3 disposed on the longitudinal axis of the valve body 1, a valve disc 4 disposed within the central cavity 3, a valve stem 5 connected to the valve disc 4, a bracket 6 disposed on the valve body 1, and an actuator 7 disposed on the bracket 6 and connected to the valve stem 5. The valve is characterized by further including a push-out pin 8 disposed within the valve disc 4 and connected to the valve stem 5, an automatic pressure relief device 9 disposed on the valve disc 4, a pressure sensor 10 disposed within the central cavity 3 for real-time monitoring of the pressure in the central cavity 3, and an actuator 7 connected to the pressure sensor 10 for... The pressure display device 11 displays the pressure value; the automatic pressure relief device 9 includes a pressure relief hole 91 disposed on the valve disc 4, a locking block 92 disposed in the pressure relief hole 91 and connected to the valve disc 4, a spring 93 connected to one end of the locking block 92, and a pressure relief valve core 94 connected to the spring 93 for pressure relief; due to the setting of the ejector pin 8, when the valve disc 4 is closed, there may be a large sealing pressure and friction between the valve disc 4 and the valve seat 2, making it difficult for the valve disc 4 to be lifted from the valve seat 2, or the valve disc 4 may become stuck under conditions of high temperature, high pressure, or particulate matter in the medium; ejector pin 8 Pin 8, through mechanical force, pushes the valve disc 4 off the valve seat 2, separating the valve disc 4 from the valve seat 2. This reduces friction when opening the valve, making operation easier and extending the service life of the gate valve. When the valve disc 4 is closed, the ejecting pin 8 ensures uniform contact between the valve disc 4 and the valve seat 2, preventing sealing problems caused by tilting or offset of the valve disc 4, and allowing the valve disc 4 to better fit the valve seat 2, thereby improving the sealing performance of the gate valve. The pressure sensor 10 and display device enable real-time monitoring of the pressure inside the cavity 3, facilitating operation. When the pressure exceeds the set value, measures are taken to increase the service life of the gate valve. The pressure sensor 10 can transmit the pressure value to the display device, which can be a mobile phone or computer. With the automatic pressure relief device 9, when the pressure in the middle cavity 3 is abnormal, the medium pressure pushes the pressure relief valve core 94, and the pressure relief valve core 94 pushes the spring 93 to discharge the medium from the pressure relief hole 91. When the pressure in the middle cavity 3 is normal, the spring 93 returns to its original position and pushes the pressure relief valve core 94 to press the pressure relief hole 91 to maintain a seal. The automatic pressure relief device 9 has a simple structure, is easy to maintain, and has a significant pressure relief effect.
[0017] In one embodiment, the locking block 92 is provided with a through hole 921; the locking block 92 is fixed in the pressure relief hole 92 of the valve disc 4 by threads, and when the pressure is released, the medium is discharged from the through hole 921 of the locking block 92.
[0018] In one embodiment, the valve body 1 is provided with a valve cover 11 connected to the valve stem 5. A gasket 12, a pressure ring 13 and a support plate 14 are provided between the valve cover 11 and the inner wall of the valve body 1 from bottom to top. A packing 15 and a packing pressure plate 16 connected to the packing 15 are provided between the valve cover 11 and the valve stem 5. A pressure plate 17 is provided on the packing pressure plate 16; thereby increasing the sealing performance between each connection point of the gate valve.
[0019] In one embodiment, the actuator 7 includes an electric actuator or a manual actuator.
[0020] In use, the actuator 7 drives the valve stem 5 to move up and down. When the valve stem 5 moves downward, it drives the valve disc 4 downward until the valve disc 4 connects with the valve seat 2. During connection, the ejector pin 8 makes the valve disc 4 fit evenly against the valve seat 2, thus closing the gate valve. When the valve stem 5 moves upward, it drives the ejector pin 8 to push the valve disc 4 upward, thus opening the gate valve. When the pressure sensor 10 detects the pressure value in the middle cavity 3 and displays it on the display device, if the pressure value in the middle cavity 3 exceeds the set value, the medium pressure pushes the pressure relief valve core 94, and the pressure relief valve core 94 pushes the spring 93 to discharge the medium from the pressure relief hole 91. When the pressure in the middle cavity 3 is normal, the spring 93 returns to its original position and pushes the pressure relief valve core 94 to press the pressure relief hole 91 to seal it.
[0021] 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 illustrative of the principles of this 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A gate valve for preventing abnormal pressure rise in the central cavity, comprising a valve body (1), a valve seat (2) disposed within the valve body (1), a central cavity (3) disposed on the longitudinal axis of the valve body (1), a valve disc (4) disposed within the central cavity (3), a valve stem (5) connected to the valve disc (4), a bracket (6) disposed on the valve body (1), and an actuator (7) disposed on the bracket (6) and connected to the valve stem (5), characterized in that: It also includes a push pin (8) installed in the valve disc (4) and connected to the valve stem (5), an automatic pressure relief device (9) installed on the valve disc (4), a pressure sensor (10) installed in the middle cavity (3) for real-time monitoring of the pressure in the middle cavity (3), and a display device connected to the pressure sensor (10) for displaying the pressure value; the automatic pressure relief device (9) includes a pressure relief hole (91) installed on the valve disc (4), a locking block (92) installed in the pressure relief hole (91) and connected to the valve disc (4), a spring (93) connected to one end of the locking block (92), and a pressure relief valve core (94) connected to the spring (93) for pressure relief.
2. The gate valve for preventing abnormal pressure rise in the cavity according to claim 1, characterized in that: The locking block (92) is provided with a through hole (921).
3. The gate valve for preventing abnormal pressure rise in the cavity according to claim 1, characterized in that: The valve body (1) is provided with a valve cover (11) connected to the valve stem (5).
4. A gate valve for preventing abnormal pressure rise in the cavity according to claim 3, characterized in that: A gasket (12), a pressure ring (13), and a support plate (14) are provided between the inner walls of the valve cover (11) and the valve body (1) from bottom to top.
5. A gate valve for preventing abnormal pressure rise in the cavity according to claim 4, characterized in that: The valve cover (11) and valve stem (5) are provided with packing (15) and packing pressure plate (16) connected to the packing (15).
6. A gate valve for preventing abnormal pressure rise in the cavity according to claim 5, characterized in that: The packing pressure plate (16) is provided with a pressure plate (17).
7. A gate valve for preventing abnormal pressure rise in the cavity according to claim 1, characterized in that: The actuator (7) includes an electric actuator or a manual actuator.