A low-pressure fire extinguishing agent storage container valve for a fire extinguishing system

Abstract

The present invention relates to the technical field of container valves, and particularly to a container valve for storing low-pressure fire extinguishing agents in a fire extinguishing system. The present invention provides a container valve for storing low-pressure fire extinguishing agents in a fire extinguishing system, which includes a valve body and a valve cover. The valve cover is provided at the upper end of the valve body. An air outlet joint is provided on one side surface of the valve body, and a storage tank joint is provided below the valve body. There is a cavity inside the combined body of the valve body and the valve cover. A piston and a push rod that can move radially are provided in the cavity. The piston is provided below the push rod, and the upper part of the push rod passes through the valve cover and is provided with a safety pin; in order to prevent the pressure in the gas storage tank from decreasing during the fire extinguishing operation, so that the piston drops and the fire extinguishing agent cannot be completely released, a locking assembly for locking the piston is provided on the side of the valve cover.

Description

Technical Field

[0001] The present invention relates to the technical field of container valves, and particularly to a container valve for storing low-pressure fire extinguishing agents in a fire extinguishing system. Background Art

[0002] Gas fire extinguishing was first applied to military ships and aircraft. So far, it has also been widely developed in the civilian field. The container valve, also known as the bottle head valve, is used to connect and seal between the gas fire extinguishing storage container and the connecting pipe. When the system operates, the container valve opens, and the fire extinguishing agent flows out from the connecting pipe through the container valve and finally sprays out through the nozzle of the connecting pipe to extinguish the fire. With the development of gas fire extinguishing technology, as a key part of the fire extinguishing agent storage container, the sealing performance and opening reliability of the container valve are directly related to the safety and reliability of the entire system.

[0003] The Chinese utility model patent with the patent name "A container valve body group capable of quickly spraying a vacuum storage tank storing liquid gas" (publication number CN201721357760) discloses a container valve body group capable of quickly spraying a vacuum storage tank storing liquid gas. The fire extinguishing agent container valve adopts a structure of piercing a diaphragm. When the thimble pierces the sealing diaphragm of the upper chamber, the pressure decreases, so that the piston cannot maintain the original sealing state, and then the fire extinguishing agent is released. This structure of piercing the diaphragm needs to replace the pierced diaphragm after each spraying and before refilling the fire extinguishing agent. The process of replacing the diaphragm is relatively cumbersome and requires a lot of manpower, time, etc. At present, there are breakthroughs in the structure of the container valve, using a piston-type sealing structure, and most of this structure needs to be used in a high-pressure environment. Its principle is that when working, the high air pressure lifts the piston to open the container valve to release the fire extinguishing agent. However, its structure has the disadvantage that when the pressure in the medicine tank is not enough to lift the piston, the piston sealing structure will fall back to its original position, causing the container valve to stop working and resulting in incomplete release of the fire extinguishing agent. In actual fires, the fire extinguishing agent in the storage tank must be completely released to achieve a complete fire extinguishing state. If a large-scale fire disaster occurs, it is easy to cause incomplete extinguishing in the first fire extinguishing and more serious secondary fires. At the same time, due to the characteristics of the gas itself, during long-term storage, due to the decline of the sealing performance of the container valve, the gas volume in the storage tank decreases, and it cannot meet the fire extinguishing requirements in case of sudden danger, resulting in losses. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a container valve for storing low-pressure fire extinguishing agents in a fire extinguishing system with good sealing performance and capable of ensuring complete release of the fire extinguishing agent during fire extinguishing work.

[0005] To achieve the above object, the present invention provides a low-pressure fire extinguishing agent storage container valve for a fire extinguishing system, which includes a valve body and a valve cover. The valve cover is provided at the upper end of the valve body. An air outlet joint is provided on one side surface of the valve body, and a storage tank joint is provided below the valve body. There is a cavity inside the combined body of the valve body and the valve cover. A piston and a push rod that can move radially are provided in the cavity. The piston is provided below the lower part of the push rod, and the upper part of the push rod passes through the valve cover and is provided with a safety pin. In order to prevent the pressure of the gas storage tank from decreasing during the fire extinguishing operation, so that the piston drops and the fire extinguishing agent cannot be completely released, a locking component that can lock the piston is provided on the side of the valve cover.

[0006] As a further improvement of the present invention, the locking component includes: a push rod sleeve and a push rod. There is a push rod cavity inside the push rod sleeve, and a guide hole is provided at the rear end of the push rod sleeve. A pull ring is provided at the part where the push rod passes through the guide hole, and the push rod can move directionally in the push rod cavity; the push rod includes a front part, a gear position and a rear part, and the diameter of the gear position is larger than that of the front part and the rear part; a spring is provided on the push rod in the push rod cavity from the gear position; the front end of the push rod sleeve is provided with a thread, and a screw hole is provided at the connection between the valve cover and the push rod sleeve. A push rod hole is provided at the center of the screw hole, and the front end of the push rod sleeve is screwed onto the screw hole of the valve cover, and the front part can pass through the push rod hole. The structure is simple and the operation is convenient.

[0007] As a further improvement of the present invention, a clamping groove is provided on the outer wall of the upper end of the piston. When the front part of the locking component passes through the push rod hole and is inserted into the clamping groove, the bottom end of the piston is higher than the upper end of the air outlet joint. Such a structure completely opens the cavity and ensures the rapid and complete release of the fire extinguishing agent in the gas storage tank.

[0008] In order to make the container valve safer during transportation, a guide hole is provided at the upper end of the valve cover, and the upper end of the push rod is inserted into the guide hole and is provided with a safety pin.

[0009] In order to make the container valve have better airtightness during the long-term quasi-working state, an "O"-shaped valve body sealing ring is provided on the inner wall of the cavity; the "O"-shaped valve body sealing ring is located on the inner wall of the cavity between the lower end of the air outlet joint and the position of the bottom end of the piston when the fire extinguisher container valve is in the quasi-working state.

[0010] As a further improvement of the present invention, the valve cover is screwed onto the valve body through a thread, and an "O"-shaped valve cover sealing ring is provided at the connection between the valve body and the valve cover.

[0011] As a further improvement of the present invention, the number of the "O"-shaped valve body sealing rings is 2.

[0012] In order to improve the overall sealing performance of the container valve body, an "O"-shaped radial sealing ring is provided on the outer wall of the upper end of the piston.

[0013] To ensure that the piston does not deviate when moving radially in the cavity and to provide a guiding and limiting function for the piston and the push rod, a "U"-shaped groove is provided inside the upper part of the piston, the lower end of the push rod is connected to the bottom surface of the "U"-shaped groove, and a spring is provided on the push rod.

[0014] The beneficial effects of the present invention are as follows: Under the action of the internal pressure of the storage tank of the fire extinguishing system storage low-pressure fire extinguishing agent container valve provided by the present invention, the piston can be lifted upward to completely open the container valve without the need for a driving mechanism in the prior art. A locking component is provided on the side of the valve cover of the container valve, and the locking component locks the piston through a clamping groove, so that the piston will not fall due to the decrease in the pressure of the low-pressure gas storage tank during the fire extinguishing process, and the fire extinguishing agent in the storage tank can be completely released; an O-shaped valve body sealing ring is provided on the inner wall of the cavity, and this double-layer sealing structure seals the installed storage tank, making it difficult for the liquid and gas in the storage tank to vaporize and dissipate; a "U"-shaped groove is provided inside the upper part of the piston, which can ensure that the piston does not deviate when moving radially in the cavity and provides a guiding and limiting function for the piston and the push rod. Brief Description of the Drawings

[0015] For ease of explanation, the present invention is described in detail by the following preferred embodiments and accompanying drawings.

[0016] Figure 1 It is a cross-sectional view of a fire extinguishing system storage low-pressure fire extinguishing agent container valve according to the present invention;

[0017] Figure 2 It is a top view of a fire extinguishing system storage low-pressure fire extinguishing agent container valve according to the present invention;

[0018] Figure 3 It is a schematic structural diagram of a locking component of a fire extinguishing system storage low-pressure fire extinguishing agent container valve according to the present invention;

[0019] Figure 4 It is a schematic structural diagram of a piston and a push rod of a fire extinguishing system storage low-pressure fire extinguishing agent container valve according to the present invention;

[0020] Figure 5 It is a schematic structural diagram of a valve body and a valve cover of a fire extinguishing system storage low-pressure fire extinguishing agent container valve according to the present invention;

[0021] In the figure: 1-valve body, 11-"O"-shaped valve body sealing ring, 2-valve cover, 21-screw hole, 22-push rod hole, 23-guiding hole, 24-"O"-shaped valve cover sealing ring, 3-air outlet joint, 4-storage tank joint, 5-cavity, 6-piston, 61-clamping groove, 62-"O"-shaped radial sealing ring, 63-"U"-shaped groove, 7-push rod, 71-spring, 8-safety pin, 9-locking component, 91-push rod sleeve, 911-push rod cavity, 912-guiding hole, 913-pull ring, 914-thread, 92-push rod, 921-front part, 922-gear position, 923-rear part, 924-spring. Detailed implementation manners

[0022] The following further describes a low-pressure fire extinguishing agent storage container valve of a fire extinguishing system according to the present invention with reference to the accompanying drawings:

[0023] Such as Figure 1 、 2As shown in Figures 3, 4, and 5, a low-pressure fire extinguishing agent storage container valve for a fire extinguishing system includes a valve body 1 and a valve cover 2. An air outlet joint 3 is provided on one side of the valve body 1, a storage tank joint 4 is provided below the valve body 1, and the valve cover 2 is provided at the upper end of the valve body 1. A cavity 5 is provided inside the combined valve body 1 and valve cover 2. When a fire occurs, the fire extinguishing agent is ejected from the storage tank joint 4, passes through the cavity 5, and then is ejected from the air outlet joint 3. A radially movable piston 6 and a push rod 7 are provided in the cavity 5. The piston 6 is provided below the lower part of the push rod 7. The upper part of the push rod 7 passes through the valve cover 2 and is provided with a safety pin 8. A "U"-shaped groove 63 is provided inside the upper part of the piston 6. The lower end of the push rod 7 is connected to the bottom surface of the "U"-shaped groove 63. A spring 71 is provided on the push rod 7, which can provide a guiding and limiting effect for the piston 6 and the push rod 7, so that the piston 6 and the push rod 7 do not deviate when making a radial movement in the cavity 5. Two "O"-shaped valve body seals 11 are provided on the inner wall of the cavity 5. The "O"-shaped valve body seals 11 are located on the inner wall of the cavity 5 between the lower end of the air outlet joint 3 and the position of the bottom end of the piston 6 when the fire extinguisher container valve is in the quasi-working state. The valve cover 2 is screwed onto the valve body 1 through a thread. An "O"-shaped valve cover seal 24 is provided at the connection between the valve body 1 and the valve cover 2 to ensure the sealing of the inner cavity between the valve cover and the valve body. The safety pin 8 provides effective safety protection before the fire extinguisher enters the working state. When the safety pin 8 is pulled out, the fire extinguisher enters the quasi-working state. In order to prevent the pressure of the gas storage tank (not marked) from decreasing during the fire extinguishing work process, so that the piston 6 drops and the fire extinguishing agent cannot be completely released, a locking component 9 for locking the piston 6 is provided on the side of the valve cover 2. The locking component 9 includes: a push rod sleeve 91 and a push rod 92. A push rod cavity 911 is provided inside the push rod sleeve 91, and a guiding hole 912 is provided at the rear end of the push rod sleeve 91. A pull ring 913 is provided at the part where the push rod 92 passes through the guiding hole 912. The push rod 92 can move directionally in the push rod cavity 911. The push rod 92 includes a front part 921, a gear position 922, and a rear part 923. The diameter of the gear position 922 is larger than that of the front part 921 and the rear part 923. The gear position 922 is inserted into the push rod cavity 911, and a spring 924 is provided on the push rod 92 in the push rod cavity 911. A thread 914 is provided at the front end of the push rod sleeve 91, and a threaded hole 21 is provided at the connection between the valve cover 2 and the push rod sleeve 91. A push rod hole 22 is provided at the center of the threaded hole 21. The front end of the push rod sleeve 91 is screwed onto the threaded hole 21 of the valve cover 2, and the front part 921 can pass through the push rod hole 22. A clamping groove 61 is provided on the outer wall of the upper end of the piston 6. When the front part 921 of the locking component 9 passes through the push rod hole 22 and is inserted into the clamping groove 61, the bottom end of the piston 6 is higher than the upper end of the air outlet joint 3. An "O"-shaped radial seal 62 is provided on the outer wall of the upper end of the piston 6.

[0024] In the quasi-working state of the valve body 1 of the present invention, the lower end of the piston 6 is located at the inner wall of the cavity 5, and the sealing performance of the low-pressure fire extinguishing agent storage container valve of the fire extinguishing system in the long-term quasi-working state is maintained by two "O"-type valve body sealing rings 11 provided on the inner wall of the cavity 5 between the lower end of the air outlet joint 3 and the position where the bottom end of the piston 6 is located in the fire extinguisher container valve in the quasi-working state; an "O"-type radial sealing ring 62 is provided at the front part of the piston 6 to ensure the radial sealing performance of the low-pressure fire extinguishing agent storage container valve of the fire extinguishing system; a push rod sleeve 91, a push rod cavity 911, a guide hole 912, a pull ring 913, a thread 914, a push rod 92, a front part 921, a gear position 922, a rear part 923, and a spring 924 are arranged in the locking assembly 9; a clamping groove 61 for inserting the front part 921 of the locking assembly 9 is provided on the outer wall of the upper end of the piston 6 to prevent the pressure in the gas storage tank from decreasing during the fire extinguishing operation, so that the piston 6 drops and the fire extinguishing agent cannot be completely released; a "U"-type groove 63 is provided in the part of the piston 6, the lower end of the ejector rod 7 is placed on the bottom surface of the "U"-type groove, and a spring 71 is placed on the ejector rod 7 to ensure that the piston does not deviate during the radial movement in the cavity, providing a guiding and limiting effect for the piston 6 and the ejector rod 7; an "O"-type valve cover sealing ring 24 is provided at the connection between the valve body 1 and the valve cover 2 to ensure the sealing performance of the low-pressure fire extinguisher container cavity; a safety pin 8 is provided at the front section of the ejector rod 7 to provide safety protection during the transportation of the fire extinguisher or before the commissioning is completed.

[0025] When a fire occurs, the fire extinguishing agent gas jacks up the piston 6 under the action of air pressure through the storage tank joint 4, driving the piston 6 and the ejector rod 7 to move radially towards the valve cover 2. The front end of the ejector rod 7 extends out through the guide hole 23 of the valve cover 2, and the fire extinguishing agent passes through the cavity 5 and then is ejected through the air outlet joint 3. During the rising process of the piston 6, the front part 921 of the locking assembly 9 is clamped into the clamping groove 61 of the piston 6 when the piston reaches the maximum limit position, locking the piston 6 to ensure that the piston 6 does not drop when the air pressure in the gas storage tank is insufficient, causing the container valve to stop working.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-pressure fire extinguishing agent storage container valve for a fire extinguishing system, comprising a valve body and a valve cover. The valve cover is provided at the upper end of the valve body. An air outlet joint is provided on one side of the valve body, and a storage tank joint is provided at the bottom of the valve body. There is a cavity inside the combined body of the valve body and the valve cover. A radially movable piston and a push rod are provided in the cavity. The lower part of the push rod is provided with a piston; a first guiding hole is provided at the upper end of the valve cover. The upper part of the push rod passes through the valve cover and is inserted into the first guiding hole and is provided with a safety pin. Characterized in that: A locking assembly capable of locking the piston is provided on the side of the valve cover; the locking assembly includes: a push rod sleeve and a push rod. A push rod cavity is provided inside the push rod sleeve. A second guiding hole is provided at the rear end of the push rod sleeve. A pull ring is provided at the part where the push rod passes through the second guiding hole. The push rod can move directionally in the push rod cavity; the push rod includes a front part, a gear position and a rear part. The diameter of the gear position is larger than that of the front part and the rear part; a spring is provided on the push rod in the push rod cavity from the gear position; the front end of the push rod sleeve is provided with a thread. A screw hole is provided at the connection between the valve cover and the push rod sleeve. A push rod hole is provided at the center of the screw hole. The front end of the push rod sleeve is screwed onto the screw hole of the valve cover, and the front part can pass through the push rod hole; a clamping groove is provided on the outer wall of the upper end of the piston. When the front part of the locking assembly passes through the push rod hole and is inserted into the clamping groove, the bottom end of the piston is higher than the upper end of the air outlet joint; a "U"-shaped groove is provided inside the upper part of the piston. The lower end of the push rod is connected to the bottom surface of the "U"-shaped groove, and a spring is provided on the push rod.

2. A low-pressure fire extinguishing agent storage container valve for a fire extinguishing system according to claim 1, Characterized in that: The valve cover is screwed onto the valve body through a thread. An "O"-shaped valve cover sealing ring is provided at the connection between the valve body and the valve cover.

3. A low-pressure fire extinguishing agent storage container valve for a fire extinguishing system according to claim 1, Characterized in that: An "O"-shaped valve body sealing ring is provided on the inner wall of the cavity; the "O"-shaped valve body sealing ring is located on the inner wall of the cavity between the lower end of the air outlet joint and the position where the bottom end of the piston is located when the fire extinguisher container valve is in the quasi-working state.

4. A low-pressure fire extinguishing agent storage container valve for a fire extinguishing system according to claim 3, Characterized in that: The number of the "O"-shaped valve body sealing rings is 2.

5. A low-pressure fire extinguishing agent storage container valve for a fire extinguishing system according to claim 1, Characterized in that: An "O"-shaped radial sealing ring is provided on the outer wall of the upper end of the piston.

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