Low-pass high-sealing one-way valve and mixed fire extinguishing equipment thereof

Abstract

The low-pass high-sealing one-way valve comprises a valve body, a valve element capable of moving up and down is installed in an inner cavity of the valve body, an elastic element is installed between the valve element and the inner wall of the valve body, a sealing cavity is formed between the valve element and the inner wall of the valve body, and a first channel and a second channel are formed in the valve element. The second channel is communicated with the sealing cavity; when a low-pressure fire extinguishing medium passes through the valve body, the end seal of the valve element is opened, and an upper port of the valve body is communicated with a lower port of the valve element through a first channel; when the high-pressure fire extinguishing medium passes through the valve body, the upper end of the valve element moves upwards and is sealed on the inner wall of the valve body, and an upper port of the valve body is separated from the first channel. Low-pressure fire extinguishing agents can pass through the one-way valve, high-pressure fire extinguishing agents cannot pass through the one-way valve, different fire extinguishing agents share part of fire-fighting pipelines, and the number of pipelines in a fire-fighting pipe network is reduced. When the one-way valve is in low-pressure circulation, the circulation amount of the fire extinguishing agent is large.

Description

Technical Field

[0001] The invention relates to fire extinguishing equipment, in particular to a low-pass high-seal one-way valve and a hybrid fire extinguishing equipment thereof. Background Art

[0002] One-way valves are generally installed in fire-fighting pipelines, some to control the flow direction of the fire-extinguishing agent in the pipeline, and some to prevent the fire-extinguishing agent from flowing back. At present, the one-way valves in the fire-fighting pipelines are basically connected in one direction and not connected in the other direction. The pressure of the fire-extinguishing agent flowing in the pipeline is not very important, and it is only related to the direction of the flow of the fire-extinguishing agent. For example, the anti-seal ring falling one-way valve disclosed in the publication number CN204459307U. At present, there are many fire-extinguishing agents on the market that share a set of fire-fighting pipelines, such as water fire-fighting and gas fire-fighting. The pressure of water fire-fighting is relatively low, and the pressure of gas fire-fighting will be relatively large. Traditional one-way valves cannot distinguish between fire-extinguishing agents under different pressures. Hybrid fire-fighting equipment has a wide application market. Some high-precision equipment requires gas fire-fighting, but some less precise equipment can use water fire-fighting. The cost of gas fire-fighting is greater than that of water fire-fighting. If the one-way valve can distinguish between fire-fighting under different pressures, the cost of fire-fighting can be greatly saved.

[0003] There is another type of valve in the fire-fighting pipeline, which is a low-leakage and high-sealing safety valve. However, this valve is used as a safety valve to mainly protect the pipeline and prevent the fire-fighting equipment from being accidentally started. When the starting bottle leaks gas, the safety valve can release low-pressure fire-extinguishing gas; when the fire-extinguishing agent is bottled and started to extinguish the fire, high-pressure fire-extinguishing gas is input into the pipeline, and the safety valve will be closed to prevent the fire-extinguishing agent from being lost and affecting the fire-fighting effect. For example, the low-leakage and high-sealing valve disclosed with the publication number CN203214991U, when low-pressure gas is released, the gas release channel is very small to avoid pipeline pressure accumulation; high-pressure sealing is that the high-pressure gas directly pushes the valve core to seal on the valve body, so this low-leakage and high-sealing valve is usually installed at the end of the pipeline, one end of the low-leakage and high-sealing valve is connected to the pipeline, and the other end is not connected to the pipeline. Summary of the invention

[0004] The present invention aims at the shortcomings of the prior art and provides a low-pass high-sealing one-way valve and a hybrid fire extinguishing device thereof.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] A low-pass high-sealing one-way valve comprises a valve body, an inner cavity of the valve body is provided with a valve core which can move up and down, an elastic element is provided between the valve core and the inner wall of the valve body, a sealing cavity is formed between the valve core and the inner wall of the valve body, a first channel and a second channel are provided on the valve core, and the second channel is communicated with the sealing cavity;

[0007] When the low-pressure fire extinguishing medium passes through the valve body, the end seal of the valve core is pushed open, and the upper port of the valve body is connected with the lower port of the valve core through the first channel;

[0008] When the high-pressure fire extinguishing medium passes through the valve body, the upper end of the valve core moves upward and seals on the inner wall of the valve body, and the upper port of the valve body is isolated from the first channel.

[0009] The one-way valve allows low-pressure fire extinguishing agents to pass through, but high-pressure fire extinguishing agents cannot pass through the one-way valve, thereby allowing different fire extinguishing agents to share some fire-fighting pipelines, reducing the number of pipelines in the fire-fighting pipeline network and reducing costs.

[0010] Preferably, the valve body includes an upper valve body and a lower valve body, the lower valve body is fastened to the upper valve body, an installation chamber is formed between the valve core and the upper valve body, the elastic element is installed in the installation chamber, the opening of the first channel faces the installation chamber and is connected with the installation chamber, and the opening of the second channel faces the upper port and is always connected with the upper port.

[0011] Preferably, the valve core includes an upper core body and a lower core body, the lower core body is fastened to the upper core body and forms a valve core cavity, the lower core body is provided with a lower groove connected to the lower port, the lower core body is provided with at least two lower connecting holes, the valve core cavity is connected to the lower groove through the lower connecting holes, the side wall of the upper core body is provided with an upper connecting hole connected to the valve core cavity, the upper connecting hole, the valve core cavity, the lower connecting hole and the lower groove form a first channel.

[0012] Preferably, the valve core also includes a connecting shaft, the upper core body is fastened to the lower core body via the connecting shaft, the connecting shaft is provided with a shaft rod channel connected to the upper port, the lower core body is provided with a vent hole connected to the sealing cavity, the diameter of the vent hole is smaller than the diameter of the shaft rod channel, the vent hole is connected to the shaft rod channel, and the vent hole and the shaft rod channel form a second channel.

[0013] Preferably, a sealing channel is provided on the upper valve body, and the upper port of the upper valve body is connected to the installation chamber through the sealing channel; the upper core body is pagoda-shaped, the lower end of the upper core body is sealed with the lower valve body, the middle part of the upper core body is sealed with the upper valve body, and the top of the upper core body can be sealed on the sealing channel.

[0014] Preferably, a step groove is provided at the lower end of the upper core body, the lower core body extends into the step groove and is axially limited on the upper core body, the upper end of the lower core body is sealed to the lower end of the upper core body, and the lower end of the lower core body is sealed on the inner wall of the lower port; a lower step surface is provided on the lower core body, and when low pressure flows, the lower step surface is limited on the lower valve body.

[0015] Preferably, a joint portion is provided at the upper end of the lower core body, one end of the connecting shaft is fastened to the joint portion, the connecting shaft is sealedly connected to the end face of the joint portion, the other end of the connecting shaft extends out of the top of the upper core body and is locked on the upper core body by a fastener, and the connecting shaft is sealedly connected to the upper core body by a sealing ring.

[0016] Preferably, an exhaust cavity is formed between the upper valve body, the lower valve body and the upper core body, and a through exhaust hole is provided on the side wall of the lower valve body, and the exhaust hole is communicated with the exhaust cavity.

[0017] Preferably, the upper port of the upper valve body is an internal threaded interface, and the lower valve body is an external threaded interface.

[0018] The hybrid fire extinguishing equipment includes a main pipe, a high-pressure pipe and a low-pressure pipe. The end of the main pipe is connected to the high-pressure pipe and the low-pressure pipe respectively through a tee. A low-pass high-sealing one-way valve is installed on the low-pressure pipe.

[0019] The present invention has significant technical effects due to the adoption of the above technical solution:

[0020] (1) The one-way valve allows low-pressure fire extinguishing agents to pass through, but high-pressure fire extinguishing agents cannot pass through the one-way valve, thereby allowing different fire extinguishing agents to share some fire-fighting pipelines, reducing the number of pipelines in the fire-fighting pipeline network and reducing costs.

[0021] (2) The low-pressure flow rate of the one-way valve is large, which is convenient for the fire extinguishing agent to pass through and achieve fire extinguishing. It is not like the existing low-leakage and high-sealing valve, which only serves as a safety valve to prevent accidental start-up and has a very small low-pressure discharge channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the cross-sectional structure of a low-pass high-sealing one-way valve when the valve core is opened.

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of a low-pass high-sealing one-way valve when the valve core is closed.

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the valve core.

[0025] Figure 4 It is a schematic diagram of the cross-sectional structure of the upper core.

[0026] Figure 5 It is a schematic diagram of the cross-sectional structure of the lower core.

[0027] Figure 6 It is a schematic diagram of the structure of the lower core when viewed from above.

[0028] Figure 7 It is a schematic diagram of the pipeline installation structure of the present invention.

[0029] The parts indicated by the numbers in the above drawings are as follows:

[0030] 1—valve body, 11—upper valve body, 12—lower valve body, 111—upper port, 112—sealing channel, 121—lower port, 122—exhaust hole

[0031] 2—valve core, 21—upper core body, 22—lower core body, 23—valve core cavity, 24—connecting shaft, 25—fastener, 211—upper connecting hole, 212—step groove, 221—lower groove, 222—lower connecting hole, 223—lower step surface, 224—joint part, 225—vent hole, 241—shaft passage

[0032] 3—Elastic element

[0033] 4 - General Manager

[0034] 5—High-pressure pipe

[0035] 6—Low pressure pipe

[0036] 7—Tee

[0037] 100—Sealed chamber

[0038] 200—First Channel

[0039] 300—Second channel

[0040] 400—Installation Room

[0041] 500—Exhaust chamber DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-7 The present invention is further described in detail with examples.

[0043] Example 1

[0044] A low-pass high-sealing one-way valve comprises a valve body 1, an inner cavity of the valve body 1 is provided with a valve core 2 which can move up and down, an elastic element 3 is provided between the valve core 2 and the inner wall of the valve body 1, in this embodiment, the elastic element 3 is a spring, a sealing cavity 100 is formed between the valve core 2 and the inner wall of the valve body 1, a first channel 200 and a second channel 300 are provided on the valve core 2, and the second channel 300 is communicated with the sealing cavity 100;

[0045] When the low-pressure fire extinguishing medium passes through the valve body 1, the end seal of the valve core 2 is pushed open, and the upper port 111 of the valve body 1 is connected to the lower port 121 of the valve core 2 through the first channel 200. The low-pressure fire extinguishing agent will flow from the upper port 111 into the first channel 200 and then flow out from the lower port 121; the low-pressure fire extinguishing medium here can be water.

[0046] When the high-pressure fire extinguishing medium passes through the valve body 1, the high-pressure fire extinguishing agent will flow into the sealed cavity 100 through the second channel 300, thereby pushing the valve core 2 to move in the opposite direction, and the upper end of the valve core 2 moves upward and seals on the inner wall of the valve body 1. The upper port 111 of the valve body 1 is isolated from the first channel 200 to prevent the high-pressure fire extinguishing agent from flowing, and to divert the fire extinguishing agents of different pressures. The high-pressure fire extinguishing medium here can be a high-pressure gas.

[0047] This one-way valve can allow low-pressure fire extinguishing agents to pass through, but high-pressure fire extinguishing agents cannot pass through the one-way valve, so that different fire extinguishing agents share some fire-fighting pipelines, reducing the number of pipelines in the fire-fighting pipeline network and reducing costs. The first channel 200 and the second channel 3000 belong to two different channels, thereby achieving different functions. The low-pressure fire extinguishing agent will push the valve core 2 forward to open the channel between the upper port 111 and the lower port 121; the high-pressure fire extinguishing agent will push the valve core 2 in the reverse direction, and the upper end of the valve core 2 will be sealed on the valve body 1, and the upper port 111 is separated from the lower port 121. The first channel 200 is used for the circulation of fire extinguishing agents, and the second channel 300 is used to form a pressure difference.

[0048] The valve body 1 includes an upper valve body 11 and a lower valve body 12, the lower valve body 12 is fastened to the upper valve body 11, the lower valve body 12 is threadedly connected to the upper valve body 11, an installation chamber 400 is formed between the valve core 2 and the upper valve body 11, and the elastic element 3 is installed in the installation chamber 400. The opening of the first channel 200 faces the installation chamber 400 and is connected thereto, the opening of the second channel 300 faces the upper port 111 and is always connected thereto, and the first channel 200 and the second channel 300 belong to two different channels. The split valve body 1 is convenient for installing the valve core 2. When the low-pressure fire extinguishing agent passes through, the low-pressure fire extinguishing agent will push open the valve core 2, open the upper port 111 and the installation chamber 400, and the low-pressure fire extinguishing agent can flow into the lower port 121 through the first channel 200.

[0049] The valve core 2 includes an upper core body 21 and a lower core body 22. The lower core body 22 is fastened to the upper core body 21 and forms a valve core cavity 23. The lower core body 22 is provided with a lower groove 221 communicating with the lower port 121. The lower core body 22 is provided with at least two lower communication holes 222. In this embodiment, the number of the lower communication holes 222 is six and evenly distributed on the lower core body 22. The valve core cavity 23 is communicated with the lower groove 221 through the lower communication holes 222. The side wall of the upper core body 21 is provided with an upper communication hole 211 communicating with the valve core cavity 23. The number of the upper communication holes 211 is also multiple. In this embodiment, the number of the upper communication holes 211 is also six and evenly distributed on the upper core body 21. The upper communication hole 211, the valve core cavity 23, the lower communication hole 222 and the lower groove 221 form a first channel 200. The split valve core 2 is convenient for processing on the one hand, and the flow rate of the first channel 200 can be designed to be large enough to ensure the rapid passage of the fire extinguishing agent on the other hand.

[0050] The valve core 2 also includes a connecting shaft 24, through which the upper core body 21 is threadedly fastened to the lower core body 22, the connecting shaft 24 is provided with a shaft passage 241 communicating with the upper port 111, and the lower core body 22 is provided with a vent hole 225 communicating with the sealing cavity 100, the number of the vent holes 225 is multiple, and the number of the vent holes 225 in this embodiment is six and evenly distributed on the lower core body 22. The diameter of the vent hole 225 is smaller than the diameter of the shaft passage 241, the central axis of the vent hole 225 is perpendicular to the central axis of the shaft passage 241, the vent hole 225 is in communication with the shaft passage 241, and the vent hole 225 and the shaft passage 241 form a second passage 300. The path of the second passage 300 does not interfere with the path of the first passage 200.

[0051] The upper valve body 11 is provided with a sealing channel 112, and the side wall of the sealing channel 112 is smooth, so as to form a sealing connection with the sealing ring on the upper valve 21. The diameter of the sealing channel 112 is smaller than the diameter of the upper port 111. The lower end surface of the sealing channel 112 also serves as a limiting surface of the elastic element 3. When the valve core 2 is pushed open, the upper port 111 of the upper valve body 11 is connected with the installation chamber 400 through the sealing channel 112. The upper core body 21 has a pagoda shape, and the lower end of the upper core body 21 is sealed and connected with the lower valve body 12 through a sealing ring, and the middle part of the upper core body 21 is sealed and connected with the upper valve body 11 through a sealing ring. A sealing ring is installed on the top of the upper core body 21. When the valve core 2 is reset, the top of the upper core body 21 can be sealed on the sealing channel 112. The sealing channel 112 is used to form a seal with the upper core body 21. The pagoda-shaped lower core body 21 facilitates sealing with the upper valve core 11 and the lower valve body 12 on the one hand, and facilitates axial limiting between the upper valve core 21 and the upper core body 11 on the other hand.

[0052] A step groove 212 is provided at the lower end of the upper core body 21, and the step groove 212 is used to install the lower core body 22. The lower core body 22 extends into the step groove 212 and is axially limited on the upper core body 21. The upper end of the lower core body 22 is sealed with the lower end of the upper core body 21 through a sealing ring, and the lower end of the lower core body 22 is sealed on the inner wall of the lower port 121 through a sealing ring; a lower step surface 223 is provided on the lower core body 22. When low pressure flows, the valve core 2 is pushed open, and the lower step surface 223 will be limited on the step surface of the lower valve body 12.

[0053] A joint part 224 is provided at the upper end of the lower core body 22, one end of the connecting shaft 24 is threadedly fastened to the joint part 224, the connecting shaft 24 and the end surface of the joint part 224 are sealed and connected through a sealing ring, the other end of the connecting shaft 24 extends out of the top of the upper core body 21 and is locked on the upper core body 21 through a fastener 25, the fastener 25 is a nut, and the connecting shaft 24 is sealed and connected to the upper core body 21 through a sealing ring. The connecting shaft 24 is used to transport the high-pressure fire extinguishing agent into the sealed cavity 100, providing a reverse thrust to the valve core 2; the connecting shaft 24 is used to fasten the upper core body 21 to the lower core body 22, and is used as a connector.

[0054] An exhaust cavity 500 is formed between the upper valve body 11, the lower valve body 12 and the upper core body 21. A through exhaust hole 122 is provided on the side wall of the lower valve body 12. The exhaust hole 122 is connected to the exhaust cavity 500. When the valve core 2 is pushed in the reverse direction, the air in the exhaust cavity 500 can be discharged through the exhaust hole 122 in time, ensuring that the upper end of the valve core 2 is smoothly sealed in the sealing channel 112 to form a high-pressure seal.

[0055] The upper port 111 of the upper valve body 11 is an internal thread interface, and the lower valve body 12 is an external thread interface. Both the internal thread interface and the external thread interface are convenient for connecting fire-fighting pipes.

[0056] Example 2

[0057] The features of the second embodiment are basically the same as those of the first embodiment, except that the exhaust hole 122 is not provided on the lower valve body 12 , and the air in the exhaust cavity 500 flows out from the gap between the upper valve body 11 and the lower valve body 12 .

[0058] Example 3

[0059] The hybrid fire extinguishing equipment comprises a main pipe 4, a high-pressure pipe 5 and a low-pressure pipe 6. The ends of the main pipe 4 are respectively connected to the high-pressure pipe 5 and the low-pressure pipe 6 through a tee 7. The low-pass high-sealing one-way valve in Example 1 or 2 is installed on the low-pressure pipe 6.

Claims

1. A low-pass high-sealing one-way valve, comprising a valve body (1), an inner cavity of the valve body (1) being provided with a valve core (2) movable up and down, an elastic element (3) being provided between the valve core (2) and the inner wall of the valve body (1), characterized in that: A sealed cavity (100) is formed between the valve core (2) and the inner wall of the valve body (1); a first channel (200) and a second channel (300) are provided on the valve core (2); and the second channel (300) is communicated with the sealed cavity (100); When the low-pressure fire extinguishing medium passes through the valve body (1), the end seal of the valve core (2) is pushed open, and the upper port (111) of the valve body (1) is connected to the lower port (121) of the valve core (2) through the first channel (200); When the high-pressure fire extinguishing medium passes through the valve body (1), the upper end of the valve core (2) moves upward and seals on the inner wall of the valve body (1), and the upper port (111) of the valve body (1) is isolated from the first channel (200).

2. The low-pass high-sealing one-way valve according to claim 1, characterized in that: The valve body (1) comprises an upper valve body (11) and a lower valve body (12), wherein the lower valve body (12) is fastened to the upper valve body (11), an installation chamber (400) is formed between the valve core (2) and the upper valve body (11), the elastic element (3) is installed in the installation chamber (400), the opening of the first channel (200) faces the installation chamber (400) and is in communication with the installation chamber (400), and the opening of the second channel (300) faces the upper port (111) and is in constant communication with the upper port (111).

3. The low-pass high-sealing one-way valve according to claim 2, characterized in that: The valve core (2) comprises an upper core body (21) and a lower core body (22); the lower core body (22) is fastened to the upper core body (21) and forms a valve core cavity (23); the lower core body (22) is provided with a lower groove (221) communicating with a lower port (121); the lower core body (22) is provided with at least two lower communication holes (222); the valve core cavity (23) is communicated with the lower groove (221) through the lower communication holes (222); the side wall of the upper core body (21) is provided with an upper communication hole (211) communicating with the valve core cavity (23); the upper communication hole (211), the valve core cavity (23), the lower communication hole (222) and the lower groove (221) form a first channel (200).

4. The low-pass high-sealing one-way valve according to claim 3, characterized in that: The valve core (2) further comprises a connecting shaft (24), the upper core body (21) is fastened to the lower core body (22) via the connecting shaft (24), the connecting shaft (24) is provided with a shaft passage (241) communicating with the upper port (111), the lower core body (22) is provided with a vent hole (225) communicating with the sealing cavity (100), the diameter of the vent hole (225) is smaller than the diameter of the shaft passage (241), the vent hole (225) is communicated with the shaft passage (241), and the vent hole (225) and the shaft passage (241) form a second passage (300).

5. The low-pass high-sealing one-way valve according to claim 3, characterized in that: A sealing channel (112) is provided on the upper valve body (11), and the upper port (111) of the upper valve body (11) is connected to the installation chamber (400) through the sealing channel (112); the upper core body (21) has a pagoda shape, the lower end of the upper core body (21) is sealed and connected to the lower valve body (12), the middle part of the upper core body (21) is sealed and connected to the upper valve body (11), and the top of the upper core body (21) can be sealed on the sealing channel (112).

6. The low-pass high-sealing one-way valve according to claim 3, characterized in that: The lower end of the upper core body (21) is provided with a step groove (212), the lower core body (22) extends into the step groove (212) and is axially limited on the upper core body (21), the upper end of the lower core body (22) is sealed to the lower end of the upper core body (21), and the lower end of the lower core body (22) is sealed on the inner wall of the lower port (121); the lower core body (22) is provided with a lower step surface (223), and when low pressure flows, the lower step surface (223) is limited on the lower valve body (12).

7. The low-pass high-sealing one-way valve according to claim 4, characterized in that: A joint portion (224) is provided at the upper end of the lower core body (22), one end of the connecting shaft (24) is fastened to the joint portion (224), the connecting shaft (24) is sealedly connected to the end surface of the joint portion (224), the other end of the connecting shaft (24) extends out of the top of the upper core body (21) and is locked on the upper core body (21) through a fastener (25), and the connecting shaft (24) is sealedly connected to the upper core body (21) through a sealing ring.

8. The low-pass high-sealing one-way valve according to claim 3, characterized in that: An exhaust cavity (500) is formed between the upper valve body (11), the lower valve body (12) and the upper core body (21); a through exhaust hole (122) is provided on the side wall of the lower valve body (12); and the exhaust hole (122) is communicated with the exhaust cavity (500).

9. The low-pass high-sealing one-way valve according to claim 2, characterized in that: The upper port (111) of the upper valve body (11) is an internal threaded interface, and the lower valve body (12) is an external threaded interface.

10. A hybrid fire extinguishing device, comprising a main pipe (4), a high-pressure pipe (5) and a low-pressure pipe (6), wherein the ends of the main pipe (4) are respectively connected to the high-pressure pipe (5) and the low-pressure pipe (6) through a tee (7), characterized in that: The low-pass and high-sealing one-way valve according to any one of claims 1 to 9 is installed on the low-pressure pipe (6).

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