A normally open gate valve
By employing a rubber piston and spring structure in the normally open gate valve, the problem of severe seal wear was solved, resulting in reduced wear of the rubber piston and improved sealing performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUYAO SHUNTONG ELECTROMAGNETIC VALVE CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-07
AI Technical Summary
The sealing rings of existing normally open gate valves wear out severely during long-term use, resulting in frequent replacements.
A normally open gate valve was designed, which adopts a rubber piston and spring structure. The rubber piston moves synchronously with the baffle during the movement, which reduces the compression of the rubber piston, and the spring pushes to ensure sealing and reduce wear.
It effectively reduces wear on rubber pistons, lowers maintenance frequency, and improves sealing performance and equipment lifespan.
Smart Images
Figure CN224469702U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of normally open gate valve technology, and in particular to a normally open gate valve. Background Technology
[0002] Normally open gate valves are designed to ensure that piping systems remain unobstructed under certain conditions, thereby reducing the risks that may arise from frequent valve operation. This design is particularly suitable for piping systems that need to be ready to respond to emergencies at any time, such as fire protection systems.
[0003] Existing normally open gate valves generally use a piston for sealing. The gate valve's opening and closing element is a gate, whose movement direction is perpendicular to the fluid direction. It forms a sealing effect with the cooperation of sealing rings on both sides. However, during long-term use, because the position of the sealing rings is fixed, the gate will squeeze the edge of the sealing rings during the gate's movement. After repeated opening and closing, the surface of the sealing rings will wear down and need to be replaced. The sealing rings need to be replaced frequently. Utility Model Content
[0004] To overcome the problem that the surface of the sealing ring of the existing normally open gate valve will wear down after repeated opening and closing, requiring replacement, and the sealing ring needs to be replaced frequently.
[0005] The technical solution of this utility model is as follows: a normally open gate valve, including a connecting pipe and an outer shell, and also including a water inlet pipe and a locking bolt. The upper end of the connecting pipe is provided with the outer shell, one end of the connecting pipe is provided with the water inlet pipe, and a locking bolt is provided on one side of the water inlet pipe. The water inlet pipe is fixedly installed at one end of the water inlet pipe by the locking bolt. A baffle for blocking fluid is provided inside the connecting pipe. A rubber piston is provided inside the connecting pipe. A stationary iron core is fixedly installed at the upper end of the outer shell. A coil is provided inside the outer shell. A moving iron core is slidably connected inside the outer shell. A spring is provided at the upper end of the moving iron core. The baffle is fixedly connected to the lower end of the moving iron core.
[0006] Preferably, the surface of the baffle is provided with a flow hole, the connecting pipe is provided with a cylindrical cavity, a rubber piston one is provided in the cylindrical cavity of the connecting pipe, a rubber piston two is provided in the cylindrical cavity of the connecting pipe, the baffle is located between the rubber piston one and the rubber piston two, and the lower end of the connecting pipe is provided with a movable cavity, in which the baffle is located.
[0007] Preferably, the surfaces of rubber piston one and rubber piston two are provided with through holes, and the through holes of rubber piston one and rubber piston two are positioned directly opposite the flow passage hole.
[0008] Preferably, a spring 2 is fitted onto the surface of the rubber piston 1, and the spring 2 is used to push the rubber piston 1.
[0009] Preferably, one end of both rubber piston one and rubber piston two is in contact with the surface of the baffle, and an O-ring two is fitted on the surface of rubber piston two.
[0010] Preferably, the lower end of the moving iron core is provided with a slot, and the baffle is set in the slot at the lower end of the moving iron core. Both the surface of the moving iron core and the baffle are provided with through holes, and a pin is provided in the through hole. The pin is used to connect the moving iron core and the baffle.
[0011] Preferably, a threaded connector is fixedly connected to the lower end of the outer casing, the connecting pipe is threadedly connected to the threaded connector, and an O-ring is fitted on the surface of the threaded connector.
[0012] The beneficial effects of this utility model are:
[0013] 1. During the movement of the baffle plate, the rubber piston moves simultaneously with the normally open gate valve. This prevents the baffle plate from excessively compressing the edge of the rubber piston, greatly reducing wear on the rubber piston. Furthermore, the spring pushes the rubber piston to ensure the sealing performance. In summary, this valve significantly reduces the number of maintenance operations while ensuring a tight seal. Attached Figure Description
[0014] Figure 1 The diagram shown is a structural schematic of one embodiment of the normally open gate valve of this utility model.
[0015] Figure 2 The diagram shown is a side view of the locking bolt of this utility model.
[0016] Figure 3 The diagram shown is a front view of the movable cavity of this utility model.
[0017] Figure 4 The diagram shown is a cross-sectional view of the rubber piston of this utility model.
[0018] Figure 5 The diagram shown is a cross-sectional view of the flow hole structure of this utility model.
[0019] Explanation of reference numerals in the attached drawings: 1. Connecting pipe; 2. Outer shell; 3. Inlet pipe; 4. Locking bolt; 5. Movable cavity; 6. Baffle plate; 7. Flow hole; 8. Moving iron core; 9. Pin; 10. Spring 1; 11. Stationary iron core; 12. Threaded connector; 13. O-ring 1; 14. Rubber piston 1; 15. Spring 2; 16. Rubber piston 2; 17. O-ring 2; 18. Coil. Detailed Implementation
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0021] Please see Figure 1 - Figure 5 This utility model provides an embodiment of a normally open gate valve, including a connecting pipe 1 and an outer shell 2, as well as an inlet pipe 3 and a locking bolt 4. The upper end of the connecting pipe 1 is provided with the outer shell 2, and one end of the connecting pipe 1 is provided with the inlet pipe 3. A locking bolt 4 is provided on one side of the inlet pipe 3. The inlet pipe 3 is fixedly installed at one end by the locking bolt 4. A baffle 6 for blocking fluid is provided inside the connecting pipe 1. A rubber piston 14 is provided inside the connecting pipe 1. A stationary iron core 11 is fixedly installed at the upper end of the outer shell 2. A coil 18 is provided inside the outer shell 2. A movable iron core 8 is slidably connected inside the outer shell 2. A spring 10 is provided at the upper end of the movable iron core 8. The baffle 6 is fixedly connected to the lower end of the movable iron core 8. In use, the baffle 6 is located in the movable cavity 5. At this time, the flow hole 7 provided on the surface of the baffle 6 is directly opposite the through hole provided on the surface of the rubber piston 16 and the rubber piston 14, and the fluid can flow through. Normally, when the passage of connecting pipe 1 needs to be closed, the stationary iron core 11 is energized. The stationary iron core 11 generates a magnetic field through the coil 18, causing the moving iron core 8 to move upward. At the same time, the baffle 6 moves upward. After the flow hole 7 on the surface of the baffle 6 intersects with the through hole of rubber piston 16 and rubber piston 14, the baffle 6 seals the passage of connecting pipe 1, and the normally open gate valve closes. The spring 10 is used to push the baffle 6 back into the movable cavity 5 after the stationary iron core 11 is de-energized, thereby opening the passage of the normally open gate valve. During the movement of the baffle 6, the rubber piston 14 will move at the same time. In this way, the baffle 6 will not cause excessive compression to the edge of the rubber piston 14, greatly reducing the wear of the rubber piston 14. Furthermore, the pushing of the rubber piston 14 by the spring 15 ensures the sealing performance. In summary, while ensuring the sealing performance, the number of maintenance is greatly reduced.
[0022] Please see Figure 4 and Figure 5 In this embodiment, the surface of the baffle 6 is provided with a flow hole 7, the connecting pipe 1 is provided with a cylindrical cavity, a rubber piston 14 is provided in the cylindrical cavity of the connecting pipe 1, a rubber piston 2 16 is provided in the cylindrical cavity of the connecting pipe 1, the baffle 6 is located between the rubber piston 14 and the rubber piston 2 16, the lower end of the connecting pipe 1 is provided with a movable cavity 5, the baffle 6 is located in the movable cavity 5, the surfaces of the rubber piston 14 and the rubber piston 2 16 are provided with through holes, the through holes of the rubber piston 14 and the rubber piston 2 16 are set opposite to the flow hole 7, the surface of the rubber piston 14 is fitted with a spring 2 15, the spring 2 15 is used to push the rubber piston 14, ensuring that one end of the rubber piston 14 can be tightly attached to the surface of the baffle 6, thereby ensuring the sealing performance, and during the movement of the baffle 6, the rubber piston 14 will move at the same time, so that the baffle 6 will not squeeze the edge of the rubber piston 14, greatly reducing the wear of the rubber piston 14.
[0023] Please see Figure 5 In this embodiment, one end of both rubber piston 14 and rubber piston 16 is in contact with the surface of baffle 6. An O-ring 17 is fitted onto the surface of rubber piston 16. A slot is provided at the lower end of the moving iron core 8, and baffle 6 is disposed within this slot. Both the moving iron core 8 and baffle 6 have through holes on their surfaces, and pins 9 are provided within these through holes. Pins 9 are used to connect the moving iron core 8 and baffle 6. A threaded connector 12 is fixedly connected to the lower end of the outer casing 2. The connecting pipe 1 is threadedly connected to the threaded connector 12. The surface of the threaded connector 12... The device is fitted with an O-ring 13 and an O-ring 17 to ensure the sealing of the connection between the rubber piston 16 and the connecting pipe 1. The threaded connector 12 is used to connect the outer shell 2 and the connecting pipe 1. The O-ring 13 is used to ensure the sealing of the connection between the threaded connector 12 and the outer shell 2. The baffle 6 and the moving iron core 8 are connected by a pin 9. When the baffle 6 needs to be replaced during maintenance, the pin 9 can be pulled out. When the rubber piston 14 needs to be replaced, the locking bolt 4 can be removed and the water inlet pipe 3 can be disassembled to remove the rubber piston 14.
[0024] When in use, the baffle 6 is located in the movable chamber 5. At this time, the flow hole 7 on the surface of the baffle 6 is directly opposite the through hole on the surface of the second rubber piston 16 and the first rubber piston 14, and the fluid can pass through normally. When it is necessary to close the passage of the connecting pipe 1, the stationary iron core 11 is energized. The stationary iron core 11 generates a magnetic field through the coil 18, causing the moving iron core 8 to move upward. The moving iron core 8 is connected to the baffle 6, and the baffle 6 moves upward at the same time. After the flow hole 7 on the surface of the baffle 6 is intersected with the through hole of the second rubber piston 16 and the first rubber piston 14, the baffle 6 seals the passage of the connecting pipe 1, and the normally open gate valve is closed. The spring 10 is used to push the baffle 6 back into the movable chamber 5 after the stationary iron core 11 is de-energized, thereby opening the passage of the normally open gate valve.
[0025] Spring 2 15 is used to push rubber piston 1 14 to ensure that one end of rubber piston 1 14 can fit tightly against the surface of baffle 6, thereby ensuring the sealing performance. During the movement of baffle 6, rubber piston 1 14 will also move at the same time, so that baffle 6 will not squeeze the edge of rubber piston 1 14, greatly reducing the wear of rubber piston 1 14.
[0026] The O-ring 17 fitted on the surface of the rubber piston 16 is used to ensure the sealing of the connection between the rubber piston 16 and the connecting pipe 1. The threaded connector 12 is used to connect the outer shell 2 and the connecting pipe 1. The O-ring 13 fitted on the surface of the threaded connector 12 is used to ensure the sealing of the connection between the threaded connector 12 and the outer shell 2.
[0027] The baffle 6 is connected to the moving iron core 8 by a pin 9. When the baffle 6 needs to be replaced during maintenance, simply pull out the pin 9.
[0028] The locking bolt 4 is used to fix the water inlet pipe 3. When the rubber piston 14 needs to be replaced, simply remove the locking bolt 4 and disassemble the water inlet pipe 3 to remove the rubber piston 14.
[0029] Through the above steps, the rubber piston 14 moves simultaneously with the baffle 6 during the movement of the normally open gate valve. This prevents the baffle 6 from excessively squeezing the edge of the rubber piston 14, greatly reducing the wear of the rubber piston 14. Furthermore, the sealing performance is ensured by the push of the rubber piston 14 by the spring 2 15. In summary, the number of maintenance operations is greatly reduced while ensuring the sealing performance.
Claims
1. A normally open gate valve, comprising a connecting pipe (1) and an outer casing (2); characterized in that: It also includes an inlet pipe (3) and a locking bolt (4). The upper end of the connecting pipe (1) is provided with an outer shell (2). One end of the connecting pipe (1) is provided with an inlet pipe (3). One side of the inlet pipe (3) is provided with a locking bolt (4). The inlet pipe (3) is fixedly installed at one end of the inlet pipe (3) by the locking bolt (4). A baffle (6) for blocking the fluid is provided inside the connecting pipe (1). A rubber piston (14) is provided inside the connecting pipe (1). A stationary iron core (11) is fixedly installed at the upper end of the outer shell (2). A coil (18) is provided inside the outer shell (2). A movable iron core (8) is slidably connected inside the outer shell (2). A spring (10) is provided at the upper end of the movable iron core (8). The baffle (6) is fixedly connected to the lower end of the movable iron core (8).
2. The normally open gate valve according to claim 1, characterized in that: The surface of the baffle (6) is provided with a flow hole (7), the connecting pipe (1) is provided with a cylindrical cavity, the cylindrical cavity of the connecting pipe (1) is provided with a rubber piston one (14), the cylindrical cavity of the connecting pipe (1) is provided with a rubber piston two (16), the baffle (6) is located between the rubber piston one (14) and the rubber piston two (16), the lower end of the connecting pipe (1) is provided with a movable cavity (5), and the baffle (6) is located in the movable cavity (5).
3. The normally open gate valve according to claim 2, characterized in that: The surfaces of rubber piston one (14) and rubber piston two (16) are provided with through holes, and the through holes of rubber piston one (14) and rubber piston two (16) are set opposite to the flow hole (7).
4. The normally open gate valve according to claim 3, characterized in that: A spring 2 (15) is fitted on the surface of the rubber piston 1 (14), and the spring 2 (15) is used to push the rubber piston 1 (14).
5. The normally open gate valve according to claim 4, characterized in that: One end of rubber piston one (14) and rubber piston two (16) are in contact with the surface of baffle (6), and O-ring two (17) is fitted on the surface of rubber piston two (16).
6. The normally open gate valve according to claim 5, characterized in that: The lower end of the moving iron core (8) is provided with a slot, and the baffle (6) is set in the slot at the lower end of the moving iron core (8). Both the moving iron core (8) and the baffle (6) are provided with through holes, and the through holes are provided with pins (9). The pins (9) are used to connect the moving iron core (8) and the baffle (6).
7. The normally open gate valve according to claim 6, characterized in that: The lower end of the outer shell (2) is fixedly connected to a threaded connector (12), and the connecting pipe (1) is threadedly connected to the threaded connector (12). An O-ring (13) is fitted on the surface of the threaded connector (12).