A gas check pressure reducing and stabilizing valve for fire fighting

Abstract

A gas non-return pressure reducing and stabilizing valve for fire fighting, the structure of which includes an inlet end cover, a valve body, and an outlet connecting piece. The inlet end cover is sleeved on the left end portion of the valve body, and the outlet connecting piece is sealed and embedded in the right end of the valve body. A closed positioning piece is provided on the inner side of the inlet end cover, and a high-pressure chamber is provided between the closed positioning piece and the valve body. Under normal circumstances, the gas non-return pressure reducing and stabilizing valve is fixed on the fire extinguishing agent container valve of a pressure-supported heptafluoropropane fire extinguishing device, and can be used as an inlet for filling the fire extinguishing agent. The filling efficiency is high and the filling time is saved. Moreover, after filling, it can be used as a one-way valve without worrying about leakage of the fire extinguishing agent.

Description

Technical Field

[0001] The utility model relates to a gas non-return type pressure reducing and stabilizing valve for fire fighting, belonging to the field of pressure reducing and stabilizing valves. Background Art

[0002] Pressure reducing and stabilizing valve (also known as pressure reducing valve) is a pressure reducing valve that adjusts the flow of the medium by controlling the opening of the opening and closing parts in the valve body, reduces the pressure of the medium, and adjusts the opening of the opening and closing parts by means of the pressure behind the valve, so that the pressure behind the valve is kept within a certain range. When the inlet pressure is constantly changing, the outlet pressure is kept within the set range, protecting the pipeline behind it with a constant pressure source. The existing pressure reducing and stabilizing valves used for the standby pressure type heptafluoropropane gas fire extinguishing system, bottle group type fine water mist fire extinguishing device and other fire fighting equipment involving non-return pressure reducing and stabilizing technology are prone to cause pressure reflux when the high-pressure fluid input into the container valve experiences pressure fluctuations, thereby causing the container valve to leak. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a gas non-return pressure reducing and stabilizing valve for fire fighting, so as to solve the problem that the existing pressure reducing and stabilizing valves used for the standby pressure type HFC-227ea gas fire extinguishing system, the bottle-type fine water mist fire extinguishing device and other fire fighting equipment involving non-return pressure reducing and stabilizing technology are prone to cause pressure reflux when the high-pressure fluid input into the container valve experiences pressure fluctuations, thereby causing the container valve to leak.

[0004] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a fire-fighting gas check pressure reducing and stabilizing valve, the structure of which includes an inlet end cover, a valve body, and an outlet connector, the inlet end cover is sleeved on the left end of the valve body, the outlet connector is sealed and embedded in the right end of the valve body, a closed positioning piece is provided on the inner side of the inlet end cover, a high-pressure chamber is provided between the closed positioning piece and the valve body, a valve core is movably provided in the middle part of the valve body, a spring seat is movably provided in the right part of the valve body, the spring seat is movably sleeved on the right end of the valve core, and a regulating chamber is formed between the spring seat and the left end of the valve core A pressure-stabilizing spring is provided in the regulating chamber, a pressure-stabilizing chamber is formed between the left end of the valve core and the outlet connecting piece, an air outlet passage communicating with the pressure-stabilizing chamber is provided on the outlet connecting piece, the valve core comprises a core body and a conical closing portion, the cross section of the core body is a T-shaped structure, the conical closing portion is arranged at the right end of the core body, an air inlet groove is provided on the core body, a closing opening corresponding to the closing positioning piece is provided at the notch of the air inlet groove, an air outlet hole communicating with the air inlet groove is provided on the outer wall of the right part of the core body, the air outlet hole is communicated with the air outlet passage through the pressure-stabilizing chamber, and the conical closing portion is movably fitted into the air outlet passage.

[0005] Furthermore, one end of the pressure stabilizing spring is connected to the left end of the core body, and the other end is sleeved outside the spring seat.

[0006] Furthermore, the end of the closed positioning piece is a truncated cone structure and is covered with a sealing ring.

[0007] Furthermore, the spring seat and the valve body are fixedly connected.

[0008] The beneficial effects of the utility model are as follows: under normal circumstances, the gas non-return pressure reducing and stabilizing valve is fixed on the fire extinguishing agent container valve of the standby pressure type heptafluoropropane fire extinguishing device, and can be used as an inlet for filling the fire extinguishing agent, with high filling efficiency and saving filling time, and after filling, it can be used as a one-way valve without worrying about leakage of the fire extinguishing agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0010] Figure 1 This is a schematic cross-sectional structure diagram of a gas check pressure reducing and stabilizing valve for fire fighting according to the utility model;

[0011] Figure 2 Detailed cross-sectional structure diagram of the valve core. DETAILED DESCRIPTION

[0012] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0013] See also Figure 1 , Figure 2The utility model provides a technical solution for a gas non-return type pressure reducing and stabilizing valve for fire fighting: its structure includes an inlet end cover 1, a valve body 2, and an outlet connector 3, wherein the inlet end cover 1 is sleeved on the left end of the valve body 2, and the outlet connector 3 is sealed and embedded in the right end of the valve body 2, a closed positioning member 4 is provided on the inner side of the inlet end cover 1, and a high-pressure chamber 5 is provided between the closed positioning member 4 and the valve body 2, a valve core 6 is movably provided in the middle part of the valve body 2, a spring seat 7 is movably provided in the right part of the valve body 2, and the spring seat 7 is movably sleeved on the right end of the valve core 6, an adjusting chamber 8 is formed between the spring seat 7 and the left end of the valve core 6, a pressure stabilizing spring 9 is provided in the adjusting chamber 8, a pressure stabilizing chamber 10 is formed between the left end of the valve core 6 and the outlet connector 3, and an outlet channel 1 communicating with the pressure stabilizing chamber 10 is provided on the outlet connector 3 1, the valve core 6 includes a core body 601 and a conical closing portion 602. The cross section of the core body 601 is a T-shaped structure. The conical closing portion 602 is arranged at the right end of the core body 601. The core body 601 is provided with an air inlet groove 603. The notch of the air inlet groove 603 is provided with a closing port 604 corresponding to the closing positioning member 4. The outer wall of the right part of the core body 601 is provided with an air outlet hole 605 communicating with the air inlet groove 603. The air outlet hole 605 is communicated with the air outlet channel 11 through the pressure stabilizing chamber 10. The conical closing portion 602 is movably fitted into the air outlet channel 11. One end of the pressure stabilizing spring 9 is connected to the left end of the core body 601, and the other end is sleeved on the outside of the spring seat 7. The end of the closing positioning member 4 is a truncated cone structure and is sleeved with a sealing ring. The spring seat 7 and the valve body 2 are fixedly connected.

[0014] Under normal circumstances, the gas check pressure reducing and stabilizing valve is fixed on the fire extinguishing agent container valve of the standby pressure type HFC-227ea fire extinguishing device, and can be used as the inlet for filling the fire extinguishing agent. It has high filling efficiency and saves filling time. After filling, it can be used as a one-way valve without worrying about fire extinguishing agent leakage. The principle is that when high-pressure fluid enters from the inlet end cover 1 and acts on the core 601, the core 601 overcomes the spring force to do work and moves toward the outlet connector 3. On the one hand, the gas consumes energy, and on the other hand, the outlet connector 3 is reduced in diameter under the action of the movement of the core 601, which is manifested as the conical closing part 602 moving toward the air outlet channel 11, thereby achieving the purpose of reducing pressure. When the pressure fluctuates, the force acting on the core 601 makes the stroke of the core 601 inconsistent, and the diameter of the outlet connector 3 also changes accordingly. The two coordinate with each other to achieve the effect of reducing and stabilizing pressure. And when the inlet delivery pressure is insufficient, the core 601 cooperates with the pressure-stabilizing spring 9 to move in the opposite direction, and the air inlet groove 603 on the core 601 is closed and restricted by the closed positioning member 4, achieving a check function to prevent the fluid pressure from decreasing.

[0015] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0016] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gas check pressure reducing and stabilizing valve for fire fighting, characterized in that: The structure comprises an inlet end cover (1), a valve body (2), and an outlet connecting piece (3). The inlet end cover (1) is sleeved on the left end of the valve body (2), and the outlet connecting piece (3) is sealed and embedded in the right end of the valve body (2). A closed positioning piece (4) is provided on the inner side of the inlet end cover (1), and a high-pressure chamber (5) is provided between the closed positioning piece (4) and the valve body (2). A valve core (6) is movably provided in the middle part of the valve body (2), and a spring seat (7) is movably provided in the right part of the valve body (2). The spring seat (7) is movably sleeved on the right end of the valve core (6), and an adjusting chamber (8) is formed between the spring seat (7) and the left end of the valve core (6). A pressure-stabilizing spring (9) is provided in the adjusting chamber (8), and a pressure-stabilizing chamber (10) is formed between the left end of the valve core (6) and the outlet connecting piece (3). 0), the outlet connecting piece (3) is provided with an air outlet passage (11) communicating with the pressure stabilizing chamber (10), the valve core (6) comprises a core body (601) and a conical closing portion (602), the cross section of the core body (601) is a T-shaped structure, the conical closing portion (602) is arranged at the right end of the core body (601), the core body (601) is provided with an air inlet groove (603), the notch of the air inlet groove (603) is provided with a closing opening (604) corresponding to the closing positioning piece (4), the outer wall of the right part of the core body (601) is provided with an air outlet hole (605) communicating with the air inlet groove (603), the air outlet hole (605) is communicated with the air outlet passage (11) through the pressure stabilizing chamber (10), and the conical closing portion (602) is movably fitted into the air outlet passage (11).

2. A fire-fighting gas check pressure reducing and stabilizing valve according to claim 1, characterized in that: One end of the pressure stabilizing spring (9) is connected to the left end of the core body (601), and the other end is sleeved outside the spring seat (7).

3. A fire-fighting gas check pressure reducing and stabilizing valve according to claim 1, characterized in that: The end of the closed positioning piece (4) is a truncated cone structure and is covered with a sealing ring.

4. A fire-fighting gas check pressure reducing and stabilizing valve according to claim 1, characterized in that: The spring seat (7) and the valve body (2) are fixedly connected.

Images