Self-decompression fire extinguishing agent bottle valve

Abstract

The utility model provides a self-decompression fire extinguishing agent bottle valve, and belongs to the technical field of valves. The problem that in the prior art, a bottle valve is poor in pressure reduction effect is solved. The bottle head valve comprises a bottle head valve body, a main piston and a balance piston are fixedly installed in the bottle head valve body, the top end of the main piston makes contact with the bottom end of the balance piston, a main piston cavity and a balance piston cavity are formed in the bottle head valve body, and the main piston is installed in the main piston cavity. The balance piston is installed in the balance piston cavity and divides the balance piston cavity into an upper balance piston cavity and a lower balance piston cavity, the upper end of the bottle head valve body is connected with a valve cover in a sealed mode, the valve cover is provided with an opening gas inlet, the opening gas inlet is communicated with the upper balance piston cavity, and the lower end of the bottle head valve body is connected with a connector in a sealed mode. A fire extinguishing agent inlet is formed in the connector, a fire extinguishing agent outlet is formed in one side of the bottle head valve body, and the fire extinguishing agent outlet communicates with the main piston cavity. The pressure reducing valve has the advantages of preventing overpressure, being good in pressure reducing effect and low in cost due to the integrated structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a self-decompression fire extinguishing agent bottle head valve. Background Art

[0002] The cylinder head valve is the valve component of the carbon dioxide fire extinguisher, and its main function is to control the filling and discharge of the fire extinguisher.

[0003] The Chinese patent with publication number CN202761948U discloses a fire extinguisher bottle head valve, including a hollow first puncture needle, and an upper valve cover, an upper valve body and a lower valve body stacked in sequence; a through hole is provided in the center of the upper valve cover, the upper valve body and the lower valve body, and the first puncture needle is accommodated in the through hole; an annular piston is sleeved on the outer wall of the middle part of the first puncture needle, and the upper valve cover, the inner wall of the upper valve body, the outer wall of the first puncture needle and the upper part of the piston form a closed cavity, and a drug explosion box is provided in the closed cavity, and an annular shock-proof pad is provided between the upper valve body and the lower valve body, and the shock-proof pad has a conical hole; A conical surface is provided on the outer wall of the lower part of the first puncture needle; the conical surface cooperates with the hole wall of the conical hole; a main diaphragm is provided below the tip of the first puncture needle, and the lower valve body is provided with a stepped side hole, the inner small hole of the stepped side hole is located below the main diaphragm, and an auxiliary diaphragm and a hollow second puncture needle are arranged in sequence in the inner small hole of the stepped side hole, and a push rod is provided at the outer end of the second puncture needle, and the push rod cooperates with the outer large hole of the stepped side hole in a sliding and sealing manner; an air guide hole connecting the closed cavity and the outer large hole of the stepped side hole is provided on the upper valve body and the lower valve body; the outlet of the second puncture needle is opened on its side.

[0004] The patent provides a fire extinguisher bottle valve that uses a puncture needle structure to puncture the diaphragm to produce piston movement, but this method requires frequent replacement of the diaphragm during long-term use, which is relatively inconvenient. Utility Model Content

[0005] The utility model aims to provide a self-decompression fire extinguishing agent bottle head valve in view of the above problems existing in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a self-decompressing fire extinguishing agent bottle head valve, including a bottle head valve body, a main piston and a balancing piston are fixedly installed inside the bottle head valve body, the top of the main piston is in contact with the bottom of the balancing piston, a main piston cavity and a balancing piston cavity are formed inside the bottle head valve body, the main piston is installed in the main piston cavity, the balancing piston is installed in the balancing piston cavity and divides the balancing piston cavity into an upper balancing piston cavity and a lower balancing piston cavity, the upper end of the bottle head valve body is sealed with a valve cover, an open gas inlet is provided on the valve cover, and the open gas inlet is connected to the upper balancing piston cavity, the lower end of the bottle head valve body is sealed with a connector, a fire extinguishing agent inlet is provided on the connector, and a fire extinguishing agent outlet is provided on one side of the bottle head valve body, and the fire extinguishing agent outlet is connected to the main piston cavity.

[0007] In the above-mentioned self-decompression fire extinguishing agent bottle head valve, a spring groove is provided at the upper end of the main piston chamber, a spring is fixed in the spring groove, and the spring is connected to the outer side of the main piston.

[0008] In the above-mentioned self-decompression fire extinguishing agent bottle head valve, the balance piston can move up and down in the balance piston chamber, and the volumes of the upper balance piston chamber and the lower balance piston chamber can change.

[0009] In the above-mentioned self-decompressing fire extinguishing agent bottle head valve, a safety screw plug is fixedly connected to one side of the bottle head valve body.

[0010] In the above-mentioned self-decompressing fire extinguishing agent bottle head valve, a diversion port is opened on the inner side of the connecting head, and the diversion port is respectively connected to the fire extinguishing agent inlet and the main piston chamber.

[0011] Compared with the prior art, the self-decompressing fire extinguishing agent bottle head valve provided by the utility model has the following beneficial effects: 1. Through the structural setting of the main piston and the balancing piston, the upper limit of the pressure value at the fire extinguishing agent outlet is determined by the air pressure at the opening gas inlet, which is convenient for setting and adjustment at any time; 2. Through the structural setting in which the top end of the main piston and the bottom end of the balancing piston are in contact, the main piston moves upward to push the balancing piston to seal the opening gas inlet, thereby preventing the fire extinguishing agent outlet from being over-pressured; 3. The utility model has an integrated design and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model in a closed state;

[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model in the opened state.

[0014] In the figure: 1. Bottle head valve body; 11. Main piston chamber; 111. Spring groove; 12. Balance piston chamber; 121. Upper balance piston chamber; 122. Lower balance piston chamber; 13. Fire extinguishing agent outlet; 2. Main piston; 3. Balance piston; 4. Valve cover; 41. Open gas inlet; 5. Connector; 51. Fire extinguishing agent inlet; 52. Diverter port; 6. Spring; 7. Safety screw plug. DETAILED DESCRIPTION

[0015] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0016] like Figure 1 to Figure 2 As shown, this embodiment includes a bottle head valve body 1, a main piston 2 and a balancing piston 3 are respectively fixedly installed inside the bottle head valve body 1, the top end of the main piston 2 contacts the bottom end of the balancing piston 3, the main piston 2 and the balancing piston 3 can both move longitudinally inside the bottle head valve body 1, and the main piston 2 can drive the balancing piston 3 to move longitudinally when moving longitudinally, a main piston cavity 11 and a balancing piston cavity 12 are formed inside the bottle head valve body 1, the main piston 2 and the balancing piston 3 are respectively installed in the main piston cavity 11 and the balancing piston cavity 12, and the balancing piston 3 divides the balancing piston cavity 12 into an upper balancing piston cavity 121 and a lower balancing piston cavity 122, and when the balancing piston 3 moves longitudinally, the volume of the upper balancing piston cavity 121 and the lower balancing piston cavity 122 can be changed, and a spring groove 111 is provided at the upper end of the main piston cavity 11, a spring 6 is fixed in the spring groove 111, and the spring 6 is connected to the outer side of the main piston 2.

[0017] like Figure 1 to Figure 2 As shown, the upper end of the bottle head valve body 1 is sealed with a valve cover 4, and an open gas inlet 41 is provided on the valve cover 4, and the open gas inlet 41 is communicated with the upper balance piston chamber 121; the lower end of the bottle head valve body 1 is sealed with a connector 5, and a fire extinguishing agent inlet 51 is provided on the connector 5; a fire extinguishing agent outlet 13 is provided on one side of the bottle head valve body 1, and the fire extinguishing agent outlet 13 is communicated with the main piston chamber 11; a safety screw plug 7 is fixedly connected to one side of the bottle head valve body 1; after this embodiment is connected to the fire extinguishing agent bottle, the fire extinguishing agent enters the bottle head valve body 1 from the fire extinguishing agent inlet 51 and is sprayed out through the fire extinguishing agent outlet 13.

[0018] To elaborate further, Figure 1 to Figure 2 As shown, a diversion port 52 is provided inside the connector 5 , and the diversion port 52 is respectively connected to the fire extinguishing agent inlet 51 and the main piston chamber 11 . The diversion port 52 effectively improves the efficiency of the fire extinguishing agent entering the bottle head valve body 1 .

[0019] The working principle of the utility model is as follows: under normal pressure, the main piston 2 blocks the fire extinguishing agent outlet 13 and stores the fire extinguishing agent under the action of the spring 6 and the pressure in the main piston chamber 11. When the fire is extinguished, the opening gas enters the upper balancing piston chamber 121 from the opening gas inlet 41. Because the force area of ​​the upper balancing piston chamber 121 is larger than the main piston chamber 11, the main piston 2 moves down to open the seal, and the fire extinguishing agent enters the lower balancing piston chamber 122 and flows out from the fire extinguishing agent outlet 13. When the pressure reaches the same as the opening gas pressure, because the area of ​​the lower balancing piston chamber 122 is consistent with the area of ​​the upper balancing piston chamber 121, the balancing piston 3 is only affected by the force of the spring 6 at this time. The main piston 2 moves up under the action of the spring 6 to reduce the volume of the upper balancing piston chamber 121, and the pressure at the fire extinguishing agent outlet 13 and the lower balancing piston chamber 122 begins to decrease, thereby achieving a decompression effect.

[0020] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0021] Although various terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A self-decompressing fire extinguishing agent bottle head valve, comprising a bottle head valve body (1), characterized in that: A main piston (2) and a balancing piston (3) are fixedly installed inside the bottle head valve body (1), the top end of the main piston (2) is in contact with the bottom end of the balancing piston (3), and a main piston chamber (11) and a balancing piston chamber (12) are formed inside the bottle head valve body (1), the main piston (2) is installed in the main piston chamber (11), and the balancing piston (3) is installed in the balancing piston chamber (12) to divide the balancing piston chamber (12) into an upper balancing piston chamber (121) and a lower balancing piston chamber (122). 2), the upper end of the bottle head valve body (1) is sealed with a valve cover (4), the valve cover (4) is provided with an opening gas inlet (41), the opening gas inlet (41) is connected to the upper balance piston chamber (121), the lower end of the bottle head valve body (1) is sealed with a connector (5), the connector (5) is provided with a fire extinguishing agent inlet (51), and one side of the bottle head valve body (1) is provided with a fire extinguishing agent outlet (13), the fire extinguishing agent outlet (13) is connected to the main piston chamber (11).

2. The self-decompression fire extinguishing agent bottle head valve according to claim 1, characterized in that: A spring groove (111) is provided at the upper end of the main piston cavity (11), a spring (6) is fixed in the spring groove (111), and the spring (6) is connected to the outer side of the main piston (2).

3. The self-decompression fire extinguishing agent bottle head valve according to claim 1, characterized in that: The balancing piston (3) can move up and down in the balancing piston chamber (12), and the volumes of the upper balancing piston chamber (121) and the lower balancing piston chamber (122) can change.

4. The self-decompression fire extinguishing agent bottle head valve according to claim 1, characterized in that: A safety screw plug (7) is fixedly connected to one side of the bottle head valve body (1).

5. The self-decompression fire extinguishing agent bottle head valve according to claim 1, characterized in that: A diversion port (52) is provided on the inner side of the connector (5), and the diversion port (52) is respectively connected to the fire extinguishing agent inlet (51) and the main piston chamber (11).

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