Kitchen fire extinguishing device nitrogen cylinder head valve with safety relief function

Abstract

The application relates to the technical field of fire extinguishers, and discloses a kitchen fire extinguishing device nitrogen cylinder head valve with a safety relief function, which comprises a nitrogen cylinder, a pressure gauge, a valve head, a valve body in the middle of the valve head, a pressure regulating knob on the upper part of the valve body, pressure measuring assemblies and a safety relief pipe arranged on the two sides of the middle part of the valve body, a base connected to the lower part of the valve body, a ventilation bin in the base, and a starting gas pipe arranged on the side face; when the temperature of the kitchen environment is too high, the nitrogen gas in the nitrogen cylinder expands in volume, the gas pressure in the cylinder increases, when the set pressure is exceeded, the nitrogen gas pushes the valve flap upwards through the ventilation pipe, drives the connecting rod device and the trigger piece to move upwards in the connecting rod device moving groove, the spring and the trigger piece are arranged, the relief can be repeated for many times, resources are saved, and the resource utilization rate is improved; the movable cover plate is arranged, the kitchen environment and the inside of the valve body are isolated, no material exchange is conducted when the relief is not conducted, the internal structure of the valve body is prevented from aging, and the service life of the equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of fire extinguishers, in particular to a kitchen fire extinguishing device nitrogen cylinder head valve with a safety relief function. BACKGROUND

[0002] Now fire safety has become a problem that people pay great attention to, and fire extinguishers are also widely used. Nitrogen (N2), also known as IG100, uses nitrogen accounting for 78% of the atmosphere as a fire extinguishing agent, fully integrates the design concept of the new era fire extinguishing system, and successfully has the functions of protecting the environment and high-efficiency fire extinguishing. It has the characteristics of protecting the ecological environment of the earth, safety and health, no fire extinguishing agent pollution, long-lasting fire extinguishing effect, etc. Nitrogen can be separated from air, has a wide source and low filling cost. The nitrogen fire extinguishing system adopts a full submersion and immersion type fire extinguishing principle, and the fire extinguishing principle is a physical fire extinguishing principle. When extinguishing a fire, it is sprayed into a dense group of protected areas to reduce the oxygen concentration in the room to below 15%, which cannot support combustion. Nitrogen will not chemically react with any substance in the protected area. After spraying, it will return to the atmosphere without residue.

[0003] Compared with the traditional 15MPa system, the nitrogen fire extinguishing system saves 25%-50% of the fire extinguishing agent cylinder. The building area between the steel cylinders is effectively reduced, and the overall use value and utilization rate of the building are improved. The constant 6MPa low pressure release reduces the pipe network and component cost of the whole system. The constant 6MPa release pressure provides more persistent and effective pressure, and the transmission distance can reach 200 meters. The overall system low pressure release has little effect on site personnel, equipment and building structure, and is safer. The external constant pressure reducer can only bear the pressure during system spraying, is easy to disassemble and maintain, and effectively reduces the system failure rate. After the system is sprayed, the system can be quickly put into operation without replacing any parts, and is simple to disassemble and refill. Reducing the opening area of the gas pressure relief port directly reduces the investment cost of the safety relief device and makes the safety buckle easier to install. The nitrogen fire extinguishing system can be widely applied to important places that need to respond quickly to fire, including places where the staff in the protected area, sudden fire and chemical reaction are sensitive, and effectively protects the safety of personnel and property.

[0004] However, the existing fire extinguisher cylinder head valve cannot solve the problem of excessive pressure in the fire extinguisher cylinder. For example, in the high-temperature environment of the kitchen, the high-pressure gas cylinder is always baked by high temperature, and the internal gas pressure will increase with the increase of temperature. When reaching a certain critical value, it is likely that the bottle body will explode due to excessive pressure, which is easy to cause safety accidents, personnel casualties and property losses. Therefore, it is urgent to invent a kitchen fire extinguishing device nitrogen cylinder head valve with a safety relief function to release the pressure of the nitrogen cylinder and ensure safety. SUMMARY

[0005] In view of the deficiencies of the prior art, the kitchen fire extinguishing device nitrogen cylinder head valve with a safety relief function is provided.

[0006] To achieve the above-mentioned purpose of relieving pressure of the nitrogen cylinder to ensure safety, the kitchen fire extinguishing device nitrogen cylinder head valve with a safety relief function is provided, which comprises a nitrogen cylinder, a pressure gauge, a valve head, the valve head is installed on the upper part of the nitrogen cylinder, the side of the valve head is connected with the pressure gauge, the middle of the valve head is provided with a valve body, the upper part of the valve body is provided with a pressure regulating knob, the middle part of the valve body is provided with a pressure measuring assembly and a safety relief pipe on both sides, the lower part of the valve body is connected with a base, the inside of the base is provided with a ventilation bin, and the side of the base is provided with a starting gas pipe.

[0007] The inside of the pressure regulating knob is provided with a cross-shaped valve rod slot, and the outside is provided with a toothed surface to facilitate rotation.

[0008] Preferably, a valve rod is arranged at the middle axis of the valve body, the upper end of the valve rod is located in the valve rod slot of the pressure regulating knob, a gasket is arranged at the upper end of the valve body, a spring is arranged in the middle of the valve body, a pressure regulating plate is arranged at the upper end of the spring, an opening is arranged at the center of the pressure regulating plate, a thread is arranged on the surface of the opening, a stop plate is fixedly connected to the lower end of the spring, a partition plate is fixedly connected to the lower end of the stop plate, a relief bin is arranged below the partition plate, an annular link device trigger slot is arranged below the partition plate, a trigger piece is connected to the lower end of the valve rod located in the link device trigger slot, an annular link device is arranged below the trigger piece, a valve flap is fixedly connected to the lower end of the link device, the lower surface of the valve flap is in contact with the ventilation pipe, and the side of the ventilation pipe is connected with the pressure measuring assembly.

[0009] Preferably, the part of the valve rod located in the valve rod slot is cross-shaped, the surface of the part connected with the pressure regulating plate is provided with threads up and down, and the remaining part is a smooth round rod.

[0010] Preferably, when the pressure regulating knob rotates, the valve rod rotates with it, the thread part on the surface of the valve rod drives the pressure regulating plate to move up and down, but the valve rod only rotates and does not move up and down.

[0011] Preferably, the pressure measuring assembly comprises a pressure measuring knob, the right end of the pressure measuring knob is connected with a pressure gauge switch valve core, the right end of the pressure gauge switch valve core is connected with an adjusting rod, the right end of the adjusting rod is connected with a pressure gauge valve core sealing piece, the right end of the pressure gauge valve core sealing piece is connected with a pressure measuring pipeline, and the pressure measuring pipeline is connected with the side of the ventilation pipe.

[0012] Preferably, when the pressure measuring knob rotates, the pressure gauge switch valve core and the adjusting rod are driven to move the position of the pressure gauge valve core sealing piece, nitrogen flows out from the nitrogen cylinder through the ventilation pipe and the pressure measuring pipeline under the action of pressure, the pressure gauge senses the pressure of the nitrogen, the pointer deviates, and the gas pressure is displayed.

[0013] Preferably, the left side of the safety relief pipe is communicated with the relief chamber, and the right side is provided with a movable cover plate, and a hinge is arranged between the movable cover plate and the safety relief pipe, and under the action of gravity, the movable cover plate will close the pipe opening of the safety relief pipe, when gas enters the safety relief pipe from the relief chamber, the movable cover plate will be pushed, and under the connection of the hinge, the movable cover plate will be opened at an angle to release the gas, and when there is no gas to push the movable cover plate, the movable cover plate will be reset under the action of gravity.

[0014] Preferably, the left side of the starting gas pipe is communicated with the ventilation chamber, and the connection part is sequentially provided with a brass pressing sleeve, a puncture diaphragm, a red copper pressing sleeve, and the brass pressing sleeve and the red copper pressing sleeve are both middle-opening annular rings.

[0015] Preferably, when the gas pressure in the nitrogen cylinder increases and exceeds the set pressure of the spring, the nitrogen will push the valve flap upwards through the ventilation pipe, drive the connecting rod device and the trigger piece to move upwards in the connecting rod device moving groove, drive the valve rod to move upwards, drive the pressure regulating plate to move upwards, and the nitrogen enters the relief chamber from the ventilation pipe and pushes the movable cover plate to open and discharge, and the process continues until the pressure in the nitrogen cylinder is less than the set pressure of the spring, the spring is contracted to drive the pressure regulating plate to move downwards, drive the valve rod to move downwards, drive the trigger piece and the connecting rod device to move downwards, drive the valve flap to move downwards, the upper end of the ventilation pipe is closed, and the nitrogen stops discharging.

[0016] Compared with the prior art, the nitrogen cylinder head valve with a safety relief function for a kitchen fire extinguishing device has the following beneficial effects:

[0017] 1. The nitrogen cylinder head valve with a safety relief function for a kitchen fire extinguishing device can accurately measure the pressure value in the cylinder at any time through the setting of the pressure measuring assembly, improve the detection capability and enhance the safety.

[0018] 2. The nitrogen cylinder head valve with a safety relief function for a kitchen fire extinguishing device can adjust and set the pressure corresponding to different situations through the setting of the pressure regulating knob, and improve the controllability of gas discharge.

[0019] 3. The nitrogen cylinder head valve with a safety relief function for a kitchen fire extinguishing device can make the gas discharge repeated multiple times through the setting of the spring and the valve flap, save resources and improve the resource utilization rate.

[0020] 4. The nitrogen cylinder head valve with a safety relief function for a kitchen fire extinguishing device can isolate the kitchen environment and the inside of the valve body through the setting of the movable cover plate, and no material exchange is performed when there is no gas discharge, so that the internal structure of the valve body is prevented from aging, and the service life of the equipment is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic view of a nitrogen cylinder connecting structure of the present application;

[0022] Figure 2 It is a schematic view of a valve head of the present application;

[0023] Figure 3 A schematic view of the valve head structure of the present application;

[0024] Figure 4 A partial a enlarged view of Figure 2 ;

[0025] Figure 5 A partial b enlarged view of Figure 2 ;

[0026] Figure 6 A partial c enlarged view of Figure 2 .

[0027] In the figure: 10, nitrogen cylinder; 20, pressure gauge; 30, valve head; 31, base; 32, connecting rod device; 33, air release chamber; 34, valve flap; 35, air pipe; 36, air release chamber; 40, valve body; 41, pressure regulating knob; 411, valve rod groove; 42, valve rod; 43, gasket; 44, pressure regulating plate; 45, spring; 46, stop plate; 47, partition plate; 48, connecting rod device trigger groove; 49, trigger piece; 50, pressure measuring assembly; 51, pressure measuring knob; 52, pressure gauge valve core; 53, adjusting rod; 54, pressure gauge valve core seal; 55, pressure measuring pipeline; 60, movable cover plate; 61, safety air release pipe; 62, hinge; 70, starting gas pipe; 71, brass pressure sleeve; 72, puncture diaphragm; 73, red copper pressure sleeve. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0029] Please refer to Figures 1-6 , a kitchen fire extinguishing device nitrogen cylinder head valve with safety relief function, comprising a nitrogen cylinder 10, a pressure gauge 20, a valve head 30, the nitrogen cylinder 10 is provided with the valve head 30 on the upper part, the valve head 30 is communicated with the pressure gauge 20 on the side, the valve head 30 is provided with a valve body 40 in the middle, the valve body 40 is provided with a pressure regulating knob 41 on the upper part, the valve body 40 is provided with a pressure measuring assembly 50 and a safety air release pipe 61 on both sides of the middle part, the valve body 40 is connected with a base 31 on the lower part, the base 31 is provided with an air release chamber 36 in the inside, and a starting gas pipe 70 is arranged on the side;

[0030] The pressure regulating knob 41 is provided with a "cross" type valve rod groove 411 in the inside, and is provided with a toothed surface on the outside to facilitate rotation.

[0031] The valve stem 42 is provided in the middle axis of the valve body 40, the upper end of the valve stem 42 is located in the valve stem groove 411 of the pressure regulating knob 41, the upper end of the valve body 40 is provided with a gasket 43, the middle is provided with a spring 45, the upper end of the spring 45 is provided with a pressure regulating plate 44, the center of the pressure regulating plate 44 is provided with an opening, the surface of the opening is provided with threads, the lower end of the spring 45 is fixedly connected with a stop plate 46, the lower end of the stop plate 46 is fixedly connected with a partition plate 47, the lower side of the partition plate 47 is a gas discharge chamber 33, the lower side of the partition plate 47 is provided with an annular connecting rod trigger groove 48, the lower end of the valve stem 42 is located in the connecting rod trigger groove 48 and is connected with a trigger piece 49, the lower side of the trigger piece 49 is an annular connecting rod 32, the lower end of the connecting rod 32 is fixedly connected with a valve flap 34, the lower surface of the valve flap 34 is in contact with an air pipe 35, and the side of the air pipe 35 is communicated with a pressure measuring assembly 50. The upper end of the valve stem 42 located in the valve stem groove 411 is a "cross" shape, the surface of the part connected with the pressure regulating plate 44 is provided with threads up and down, and the remaining part is a smooth round rod.

[0032] The upper end of the valve stem 42 located in the valve stem groove 411 is a "cross" shape, the surface of the part connected with the pressure regulating plate 44 is provided with threads up and down, and the remaining part is a smooth round rod.

[0033] When the pressure regulating knob 41 rotates, the valve stem 42 will rotate with it, and the threaded surface part will drive the pressure regulating plate 44 to move up and down, but the valve stem 42 only rotates and does not move up and down.

[0034] The pressure measuring assembly 50 comprises a pressure measuring knob 51, the right end of the pressure measuring knob 51 is connected with a pressure gauge switch valve core 52, the right end of the pressure gauge switch valve core 52 is connected with an adjusting rod 53, the right end of the adjusting rod 53 is connected with a pressure gauge valve core sealing piece 54, the right end of the pressure gauge valve core sealing piece 54 is connected with a pressure measuring pipeline 55, and the pressure measuring pipeline 55 is communicated with the side of the air pipe 35.

[0035] When the pressure measuring knob 51 rotates, the pressure gauge switch valve core 52 and the adjusting rod 53 are driven to move the pressure gauge switch valve core sealing piece 54 to a position, nitrogen flows out from the nitrogen cylinder 10 through the air pipe 35 and the pressure measuring pipeline 55 under the action of pressure, so that the pressure gauge 20 senses the pressure of the nitrogen, the pointer is deviated, and the gas pressure is displayed.

[0036] The safety gas discharge pipe 61 is communicated with the gas discharge chamber 33 on the left side, and is provided with a movable cover plate 60 on the right side, and a hinge 62 is arranged between the movable cover plate 60 and the safety gas discharge pipe 61. Under the action of gravity, the movable cover plate 60 will close the pipe opening of the safety gas discharge pipe 61, when gas enters the safety gas discharge pipe 61 from the gas discharge chamber 33, the movable cover plate 60 will be pushed, and under the connection of the hinge 62, the movable cover plate 60 is opened at an angle to discharge gas, when there is no gas to push the movable cover plate 60, the movable cover plate 60 is reset under the action of gravity.

[0037] The left side of the starting air pipe 70 is connected with the ventilation bin 36, and the connection is from left to right in turn: brass pressure sleeve 71, puncture diaphragm 72, red copper pressure sleeve 73, and brass pressure sleeve 71 and red copper pressure sleeve 73 are both annular rings with middle holes.

[0038] When the pressure in the nitrogen cylinder 10 increases beyond the set pressure of the spring 45, the nitrogen will push the valve flap 34 upward through the ventilation pipe 35, drive the connecting rod device 32 and the trigger piece 49 to move upward in the connecting rod movable slot 48, drive the valve rod 42 to move upward, and drive the pressure regulating plate 44 to move upward. Nitrogen enters the ventilation pipe 35 into the exhaust bin 33 and pushes the movable cover plate 60 to open and discharge through the safety exhaust pipe 61, and continues until the pressure in the nitrogen cylinder 10 is less than the set pressure of the spring 45. The spring 45 contracts to drive the pressure regulating plate 44 to move downward, so that the valve rod 42 moves downward, drives the trigger piece 49 and the connecting rod device 32 to move downward, so that the valve flap 34 moves downward, and the upper end of the ventilation pipe 35 is closed. Nitrogen stops discharging.

[0039] In use, it is divided into four aspects.

[0040] Pressure detection: when it is necessary to detect the pressure in the nitrogen cylinder 10, the pressure gauge switch valve core 52 and the adjusting rod 53 can be driven by rotating the pressure detection knob 51 to move the pressure gauge switch valve core sealing piece 54. Nitrogen flows out from the nitrogen cylinder 10 through the ventilation pipe 35 and the pressure measuring pipeline 55 under the action of pressure, and the pressure gauge 20 senses the pressure of nitrogen, so that the pointer shakes and displays the pressure.

[0041] Pressure regulation: by rotating the pressure regulating knob 41, the valve rod slot 411 in the inside thereof is engaged with the upper part of the valve rod 42, the valve rod 42 is driven to rotate, the threads on the valve rod 42 drive the pressure regulating plate 44 to move up and down, the spring 45 is contracted and the downward pulling force of the valve rod 42 is changed, so as to adjust the safety pressure, i.e. the set pressure.

[0042] Normal use: the puncture diaphragm 72 needs to be punctured, and the nitrogen in the nitrogen cylinder 10 will flow out from the nitrogen cylinder 10 through the ventilation bin 36 and the starting air pipe under the action of pressure, so as to realize normal use.

[0043] Safety relief, when the kitchen environment temperature is too high, the nitrogen volume in the nitrogen cylinder 10 expands, causing the pressure in the cylinder to increase, when it exceeds the set pressure, nitrogen pushes the valve flap 34 upward through the vent pipe 35, drives the connecting rod device 32 and the trigger piece 49 to move upward in the connecting rod movable slot 48, drives the valve rod 42 to move upward, the valve rod 42 drives the pressure regulating plate 44 to move upward, nitrogen enters the gas discharge chamber 33 from the vent pipe 35 and pushes the movable cover plate 60 to open the safety relief pipe 61 to discharge, complete the safety relief, continue until the pressure in the nitrogen cylinder 10 is less than the set pressure of the spring 45, the spring 45 contracts to drive the pressure regulating plate 44 to move downward, the valve rod 42 moves downward, the trigger piece 49 and the connecting rod device 32 move downward, the valve flap 34 moves downward, the upper end of the vent pipe 35 is closed, and the nitrogen stops discharging. The movable cover plate 60 closes the safety relief pipe under the action of its own gravity.

[0044] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences, modifications, replacements and variations of the embodiments, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A nitrogen cylinder head valve for a kitchen fire extinguishing device with a safety relief function, comprising a nitrogen cylinder (10), a pressure gauge (20), and a valve head (30), wherein the valve head (30) is installed on the upper part of the nitrogen cylinder (10), and the pressure gauge (20) is connected to the side of the valve head (30), characterized in that: The valve head (30) has a valve body (40) in the middle. The valve body (40) has a pressure regulating knob (41) on the upper part. The valve body (40) has a pressure measuring component (50) and a safety vent pipe (61) on both sides of the middle part. The valve body (40) is connected to the base (31) at the lower part. The base (31) has an air chamber (36) inside and an start air pipe (70) on the side. The pressure regulating knob (41) has a cross-shaped valve stem groove (411) inside, and its exterior is provided with teeth for easy rotation. A valve stem (42) is provided at the central axis inside the valve body (40). The upper end of the valve stem (42) is located in the valve stem groove (411) of the pressure regulating knob (41). There is a gasket (43) at the upper end inside the valve body (40), and a spring (45) in the middle. A pressure regulating plate (44) is provided at the upper end of the spring (45). There is an opening at the center of the pressure regulating plate (44), and the surface of the opening is threaded. The lower end of the spring (45) is fixedly connected to a stop plate (46), and the lower end of the stop plate (46) is fixedly connected to a partition plate (47). Below the partition (47) is a vent chamber (33). Below the partition (47) is an annular connecting rod trigger groove (48). The lower end of the valve stem (42) is located in the connecting rod trigger groove (48) and connected to the trigger plate (49). Below the trigger plate (49) is an annular connecting rod (32). Below the connecting rod (32) is a valve disc (34). The lower surface of the valve disc (34) is in contact with the vent pipe (35). The side of the vent pipe (35) is connected to the pressure measuring component (50). When the pressure regulating knob (41) is turned, the valve stem (42) will rotate accordingly, and the threaded part on its surface will drive the pressure regulating plate (44) to move up and down, but the valve stem (42) will only rotate and will not move up and down; When the gas pressure inside the nitrogen cylinder (10) increases beyond the set pressure of the spring (45) set by the pressure regulating knob (41), the nitrogen will push the valve disc (34) upward through the vent pipe (35), causing the connecting rod (32) and trigger plate (49) to move upward in the connecting rod movable groove (48), causing the valve rod (42) to move upward. The valve rod (42) then causes the pressure regulating plate (44) to move upward. The nitrogen enters the vent chamber (33) through the vent pipe (35) and pushes the movable cover plate (60) to open and discharge through the safety vent pipe (61). This continues until the pressure inside the nitrogen cylinder (10) is less than the set pressure of the spring (45). The spring (45) contracts and causes the pressure regulating plate (44) to move downward, causing the valve rod (42) to move downward, causing the trigger plate (49) and connecting rod (32) to move downward, causing the valve disc (34) to move downward, closing the upper end of the vent pipe (35), and stopping the nitrogen release.

2. The nitrogen cylinder head valve of a kitchen fire extinguishing device with a safety relief function according to claim 1, characterized in that: The upper end of the valve stem (42) is located inside the valve stem groove (411) and is divided into a "+" shape. The part connected to the pressure regulating plate (44) has threads on the upper and lower surfaces, while the rest is a smooth round rod.

3. The nitrogen cylinder head valve of a kitchen fire extinguishing device with a safety relief function according to claim 1, characterized in that: The pressure measuring assembly (50) includes a pressure measuring knob (51), the right end of which is connected to the pressure gauge switch valve core (52), the right end of which is connected to the adjusting rod (53), the right end of which is connected to the pressure gauge valve core seal (54), the right end of which is connected to the pressure measuring pipe (55), and the pressure measuring pipe (55) is connected to the side of the vent pipe (35).

4. A nitrogen cylinder head valve for a kitchen fire extinguishing device with a safety relief function according to claim 3, characterized in that: When the pressure measuring knob (51) is turned, it will drive the pressure gauge switch valve core (52) and the adjusting rod (53) to move the pressure gauge switch valve core seal (54). Under the action of pressure, nitrogen gas flows out from the nitrogen cylinder (10) through the vent pipe (35) and the pressure measuring pipe (55), so that the pressure gauge (20) senses the pressure of nitrogen gas, and its pointer deflects to display the gas pressure.

5. A nitrogen cylinder head valve for a kitchen fire extinguishing device with a safety relief function according to claim 1, characterized in that: The safety vent pipe (61) is connected to the vent chamber (33) on the left and has a movable cover plate (60) on the right. The movable cover plate (60) is connected to the vent chamber (33) by a hinge (62). Under the action of gravity, the movable cover plate (60) will close the opening of the safety vent pipe (61). When gas enters the safety vent pipe (61) from the vent chamber (33), it will push the movable cover plate (60). Under the connection of the hinge (62), the movable cover plate (60) opens to release gas. When there is no gas pushing the movable cover plate (60), the movable cover plate (60) will reset under the action of gravity.

6. The nitrogen cylinder head valve of a kitchen fire extinguishing device with a safety relief function according to claim 1, characterized in that: The start-up air pipe (70) is connected to the ventilation chamber (36) on the left side. The connection points are, from left to right, a brass sleeve (71), a punctured diaphragm (72), and a copper sleeve (73). Both the brass sleeve (71) and the copper sleeve (73) are circular rings with a hole in the middle.

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