High-efficiency sealing cylinder head valve oil-discharging nitrogen-injecting fire extinguishing device

Abstract

The utility model discloses an efficient sealing cylinder head valve oil discharging and nitrogen injecting fire extinguishing device, and relates to the technical field of fire fighting equipment, the efficient sealing cylinder head valve oil discharging and nitrogen injecting fire extinguishing device comprises a valve body, the valve body is of a six-way structure, a valve element is arranged in the valve body, a pressure control opening and an air outlet which are communicated with each other are formed in the positions, located on the two sides of the valve element, of the valve body, and a valve bonnet is arranged on the side, corresponding to the pressure control opening, of the valve body; a spring is fixed between the valve bonnet and the valve core, and a sealing diaphragm is arranged on the inner side of the valve bonnet; the valve element moves left and right in the valve body, one end of the valve element extends and moves towards the right side to block the air outlet, and the other end of the valve element is in sliding fit connection in the pressure control opening. A pressure conveying cavity is formed in the valve element in a left-right penetrating mode, and the pressure conveying cavity, the pressure control opening and the air outlet communicate with one another. The problems that in the prior art, the sealing performance of a bottle head valve cannot be well guaranteed on the premise that use safety is guaranteed, valve leakage is likely to happen, resources are wasted, cost is increased, and meanwhile inconvenience is brought to a user in use are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting equipment, in particular to a highly efficient and sealed bottle head valve oil-draining and nitrogen-injecting fire extinguishing device. Background Art

[0002] The principle of oil drainage and nitrogen injection fire extinguishing is that when the transformer encounters insulation failure or other faults, causing the transformer oil temperature to rise sharply, when there is an imminent explosion or fire danger, the control system confirms that it has received the electrical fault signal, temperature detection signal and the key signal of the heavy gas signal light, and immediately starts the oil drainage mechanism - oil drainage and pressure relief, and then starts the nitrogen injection system to continuously inject sufficient nitrogen into the transformer, stir and cool the transformer oil, so that its oil temperature drops below the flash point; at the same time, a large amount of nitrogen fills the entire transformer tank, isolating oxygen, thereby achieving efficient fire extinguishing. The nitrogen cylinders used in the existing nitrogen injection system are usually large steel cylinders equipped with a bottle head valve to control the flow of gas in the cylinder. By opening the bottle head valve, the nitrogen in the nitrogen cylinder is released through the bottle head valve.

[0003] However, it is difficult to ensure the sealing of the bottle head valve under the premise of ensuring safety in use. It is easy to cause valve leakage, which wastes resources, increases costs and brings inconvenience to users. Utility Model Content

[0004] The embodiment of the present application provides a highly efficient and sealed bottle head valve oil discharge and nitrogen injection fire extinguishing device, thereby solving the problem in the prior art that it is difficult to ensure the sealing of the bottle head valve while ensuring safe use, and the problem that valve leakage is prone to occur, which wastes resources, increases costs and brings inconvenience to users.

[0005] The embodiment of the present application provides a highly efficient and sealed bottle head valve oil discharge and nitrogen injection fire extinguishing device, comprising a valve body, the valve body being a six-way structure, a valve core being arranged in the valve body, a pressure control port and an air outlet being interconnected and arranged on both sides of the valve core on the valve body, a valve cap being arranged on one side of the valve body corresponding to the pressure control port, a spring being fixed between the valve cap and the valve core, and a sealing diaphragm being arranged on the inner side of the valve cap;

[0006] The valve core moves left and right in the valve body, one end of the valve core extends to the right to block the air outlet, and the other end of the valve core slides and fits in the pressure control port;

[0007] The valve core is provided with a pressure delivery cavity running through the left and right sides, the pressure delivery cavity, the pressure control port and the air outlet are interconnected, and the surface area of ​​the left side of the valve core is larger than that of the right side.

[0008] Preferably, the valve cap is provided with a starting device, and the starting device is used to puncture the sealing membrane.

[0009] Preferably, the starting device is an electric starter.

[0010] Preferably, a sealing gasket is provided on the inner wall edge of the inner side of the valve bonnet corresponding to the pressure control port, and an O-ring is provided on the inner side of the valve bonnet at a contact position corresponding to the valve body.

[0011] Preferably, a vent is provided on one side of the valve body, a safety vent is provided on the vent, the safety vent comprises a copper pad arranged in the vent, a pressure relief nut is provided at the vent, and a safety diaphragm is provided on the inner side of the pressure relief nut.

[0012] Preferably, a pressure gauge connection seat is provided at the top of the valve body, the valve body and the pressure gauge connection seat are communicated, and the pressure gauge connection seat is used to connect and measure the gas pressure in the valve body.

[0013] Preferably, a nitrogen injection system is also included, and the valve body is connected to the nitrogen injection system via a gas collecting main pipe.

[0014] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0015] By adopting the valve core, pressure delivery chamber, pressure control port and air outlet, the pressure delivery chamber, pressure control port and air outlet are interconnected, and the surface area of ​​the left side of the valve core is larger than the surface area of ​​the right side, so that the axial force acting on the left surface of the valve core is larger than the axial force acting on the right surface of the valve core. The higher the pressure, the greater the difference in axial force acting on the left and right surfaces of the valve core, and the better the sealing. The right side of the valve core blocks the air outlet to achieve an efficient sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front sectional structural schematic diagram of the utility model of a highly efficient sealing bottle head valve oil discharge nitrogen injection fire extinguishing device;

[0017] Figure 2 It is a right view structural schematic diagram of the utility model of a highly efficient sealing bottle head valve oil discharge nitrogen injection fire extinguishing device;

[0018] Figure 3 This is a usage scenario diagram of the utility model's high-efficiency sealed bottle head valve oil discharge and nitrogen injection fire extinguishing device.

[0019] In the figure: 1. valve body; 2. valve core; 3. pressure control port; 4. air outlet; 5. safety air release device; 501. copper gasket; 502. pressure relief nut; 503. safety diaphragm; 6. valve cap; 7. spring; 8. sealing diaphragm; 9. pressure delivery chamber; 10. sealing gasket; 11. O-ring; 12. pressure gauge connection seat; 13. nitrogen injection system. DETAILED DESCRIPTION

[0020] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0021] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention are only for the purpose of describing specific implementation methods and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] like Figures 1 to 3 As shown, the present application provides a highly efficient and sealed bottle head valve oil discharge and nitrogen injection fire extinguishing device, comprising a valve body 1, the valve body 1 is a six-way structure, a valve core 2 is arranged in the valve body 1, and the valve body 1 is provided with a pressure control port 3 and an air outlet 4 which are interconnected on both sides of the valve core 2, the pressure control port 3 and the air outlet 4 are respectively arranged on the left and right sides of the valve body 1, the air outlet 4 is connected to the gas collecting main pipe, the front and rear sides of the valve body 1 are respectively provided with an air inlet and an air release port, the bottom end of the valve body 1 is connected to a nitrogen bottle, a nitrogen injection solenoid valve is arranged on the air inlet, and nitrogen is injected into the nitrogen bottle by starting the nitrogen injection solenoid valve, a valve cap 6 is arranged on the side of the valve body 1 corresponding to the pressure control port 3, a spring 7 is fixed between the valve cap 6 and the valve core 2, and a sealing diaphragm 8 is arranged on the inner side of the valve cap 6;

[0024] The valve core 2 moves left and right in the valve body 1, one end of the valve core 2 extends to the right to block the air outlet 4, and the other end of the valve core 2 slides and fits in the pressure control port 3;

[0025] The valve core 2 is provided with a pressure delivery cavity 9 extending through the left and right sides thereof. The pressure delivery cavity 9, the pressure control port 3 and the air outlet 4 are interconnected. The surface area of ​​the left side of the valve core 2 is larger than that of the right side.

[0026] Further specific explanation: The bottle head valve uses pressure difference to push the valve core 2 to seal. The pressure is the pressure generated by the nitrogen in the bottle, and the sealing performance is greatly improved. The pressure delivery chamber 9 on the valve core 2, the pressure control port 3 on the valve body 1 and the gas outlet 4 are all interconnected. The advantage of this design is that in the nitrogen sealing stage, the valve body 1 is sealed, and the pressures between the pressure delivery chamber 9, the pressure control port 3 and the gas outlet 4 are equal. Since the left surface area of ​​the valve core 2 is larger than the right surface area, the axial force acting on the left surface of the valve core 2 is greater than the axial force acting on the right surface of the valve core 2. The higher the pressure, the greater the difference in axial force acting on the left and right surfaces of the valve core 2, and the better the sealing, and the right side of the valve core 2 blocks the gas outlet 4.

[0027] Specifically, the valve cap 6 is provided with a starting device, and the starting device is used to puncture the sealing membrane 8.

[0028] To further specify: when the pressure in the left chamber of the valve core 2 of the bottle head valve is released after piercing the sealing diaphragm 8 under the action of the starting device, the pressure in the left chamber cannot be replenished, and the force formed on the right surface of the valve core 2 is much greater than that on the left surface, thereby causing the valve core 2 to move to the left and the bottle head valve to open.

[0029] Specifically, the starting device is an electric starter.

[0030] To further specify: the electric starter includes an electric starter body, an electromagnet, a knife switch and a handwheel. The electric starter uses the electromagnet to push the knife switch to pierce the sealing diaphragm 8 to achieve the purpose of nitrogen release. The electric starter has a manual function. The above-mentioned starting device is an application of the existing technology and will not be repeated here.

[0031] Specifically, a sealing gasket 10 is provided at the inner wall edge of the inner side of the valve bonnet 6 corresponding to the pressure control port 3 , and an O-type sealing ring 11 is provided at the contact position of the inner side of the valve bonnet 6 corresponding to the valve body 1 .

[0032] To further explain in detail: through the design of the sealing gasket 10 and the O-ring 11, the connection sealing performance between the valve cap 6 and the valve body 1 is strengthened, gas leakage is avoided, and the sealing performance of the valve body 1 is strengthened.

[0033] Specifically, one side of the valve body 1 has an air vent, and a safety air vent device 5 is disposed on the air vent. The safety air vent device 5 includes a copper pad 501 disposed in the air vent, a pressure relief nut 502 is disposed at the air vent, and a safety diaphragm 503 is disposed on the inner side of the pressure relief nut 502 .

[0034] To further explain in detail: the copper gasket 501 is used to strengthen the airtightness of the connection between the pressure relief nut 502 and the pressure relief port. When the pressure in the nitrogen bottle is too high, the safety diaphragm 503 will burst and the gas will be released.

[0035] Specifically, a pressure gauge connection seat 12 is provided at the top of the valve body 1 , the valve body 1 and the pressure gauge connection seat 12 are in communication, and the pressure gauge connection seat 12 is used to connect and measure the gas pressure in the valve body 1 .

[0036] Further specific description: The pressure gauge connection seat 12 is connected to the inside of the valve body 1 and is used to measure the nitrogen pressure in the nitrogen bottle.

[0037] Specifically, it also includes a nitrogen injection system 13, and the valve body 1 is connected to the nitrogen injection system 13 via a gas collecting main pipe.

[0038] To further explain in detail: after opening the nitrogen injection system 13 and the bottle head valve, the nitrogen in the nitrogen bottle enters the nitrogen injection pipeline through the nitrogen injection system 13 to extinguish the fire of the oil-immersed transformer equipment.

[0039] After the installation of the high-efficiency sealed bottle head valve oil discharge and nitrogen injection fire extinguishing device of the embodiment of the present application is completed, in the nitrogen sealing stage, the valve body 1 is sealed, the pressure delivery chamber 9 on the valve core 2, the pressure control port 3 on the valve body 1 and the gas outlet 4 are all interconnected, and the pressures among the pressure delivery chamber 9, the pressure control port 3 and the gas outlet 4 are equal. Since the left surface area of ​​the valve core 2 is larger than the right surface area, the axial force acting on the left surface of the valve core 2 is larger than the axial force acting on the right surface of the valve core 2. The higher the pressure, the greater the difference in axial forces acting on the left and right surfaces of the valve core 2, and the better the sealing, and the right side of the valve core 2 is blocked at the gas outlet 4;

[0040] When it is necessary to extinguish the oil-immersed transformer, the starting device is turned on, and the pressure in the left chamber of the bottle head valve core 2 punctures the sealing diaphragm 8 under the action of the starting device and is released. The pressure in the left chamber cannot be replenished, and the force formed on the right surface of the valve core 2 is much greater than that on the left surface, so that the valve core 2 moves to the left, and the valve core 2 does not block the air outlet 4. The bottle head valve is opened, and the nitrogen in the nitrogen bottle is released and connected to the nitrogen injection system 13 through the gas collecting main pipe to extinguish the oil-immersed transformer.

[0041] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A highly efficient and airtight bottle head valve oil discharge and nitrogen injection fire extinguishing device, comprising a valve body (1), the valve body (1) being a six-way structure, a valve core (2) being arranged in the valve body (1), and characterized in that: The valve body (1) is provided with a pressure control port (3) and an air outlet (4) which are interconnected on both sides of the valve core (2); a valve cap (6) is provided on the valve body (1) on the side corresponding to the pressure control port (3); a spring (7) is fixed between the valve cap (6) and the valve core (2); and a sealing diaphragm (8) is provided on the inner side of the valve cap (6); The valve core (2) moves left and right in the valve body (1), one end of the valve core (2) extends to the right to block the air outlet (4), and the other end of the valve core (2) slides and fits in the pressure control port (3); The valve core (2) is provided with a pressure delivery cavity (9) extending through the left and right sides thereof; the pressure delivery cavity (9), the pressure control port (3) and the air outlet (4) are interconnected; and the surface area of ​​the left side of the valve core (2) is larger than that of the right side.

2. The high-efficiency sealed bottle head valve oil discharge nitrogen injection fire extinguishing device as claimed in claim 1, characterized in that: The valve cap (6) is provided with a starting device, and the starting device is used to puncture the sealing membrane (8).

3. The high-efficiency sealed bottle head valve oil discharge and nitrogen injection fire extinguishing device as claimed in claim 2 is characterized in that: The starting device is an electric starter.

4. The high-efficiency sealed bottle head valve oil discharge nitrogen injection fire extinguishing device as claimed in claim 1, characterized in that: A sealing gasket (10) is provided on the inner wall edge of the inner side of the valve cap (6) corresponding to the pressure control port (3), and an O-type sealing ring (11) is provided on the inner side of the valve cap (6) at a contact position corresponding to the valve body (1).

5. The high-efficiency sealed bottle head valve oil discharge nitrogen injection fire extinguishing device as claimed in claim 1, characterized in that: The valve body (1) has an air release port on one side, and a safety air release device (5) is provided on the air release port. The safety air release device (5) comprises a copper pad (501) arranged in the air release port, a pressure relief nut (502) is provided at the air release port, and a safety diaphragm (503) is provided on the inner side of the pressure relief nut (502).

6. The high-efficiency sealed bottle head valve oil discharge nitrogen injection fire extinguishing device as claimed in claim 1, characterized in that: A pressure gauge connection seat (12) is provided at the top end of the valve body (1); the valve body (1) and the pressure gauge connection seat (12) are in communication; the pressure gauge connection seat (12) is used to connect and measure the gas pressure in the valve body (1).

7. The high-efficiency sealed bottle head valve oil discharge nitrogen injection fire extinguishing device as claimed in claim 1, characterized in that: It also includes a nitrogen injection system (13), and the valve body (1) is connected to the nitrogen injection system (13) via a gas collecting main pipe.

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