Aerosol fire extinguisher with pressure gauge and valve

Abstract

The utility model provides a kind of aerosol type fire extinguisher and its valve with pressure gauge, it is to meet the display requirement to the pressure inside fire extinguisher, fire extinguisher includes device head, valve and tank, it is equipped with the injection port of intercommunication described valve and the injection pressure handle for touching pressure described valve to make it open on described device head, it is characterized by: described valve includes valve body, valve cup, valve core, sealing ring and spring, described valve core includes valve core seat and the valve core stem that by valve core seat upward protruding, described valve core stem has the first passage through along its central axis, and the first passage is connected with valve cavity;Described valve core stem passes out valve cup and is connected with pressure gauge, outer cylinder is sleeved on described valve core stem, second passage is formed between the inner wall of described outer cylinder and the outer wall of described valve core stem, and the second passage is communicated with described injection port, outlet is equipped with the second passage in the bottom of outer cylinder, and sealing ring is sleeved on outer cylinder to close the outlet.

Description

Technical Field

[0001] This utility model relates to an aerosol fire extinguisher with a pressure gauge and its valve. Background Technology

[0002] Portable fire extinguishers are widely used in cars and homes for preventing small fires due to their small size and portability. These extinguishers rely on the pressure inside the canister to spray their contents. If the pressure drops below a certain level, the contents cannot be effectively sprayed, delaying firefighting. Therefore, it is necessary to install a pressure gauge to display the internal pressure of the fire extinguisher. Utility Model Content

[0003] This utility model proposes an aerosol fire extinguisher with a pressure gauge and its valve, aiming to meet the need for displaying the internal pressure of the fire extinguisher. This is achieved through the following technical means: This utility model discloses an aerosol fire extinguisher with a pressure gauge, comprising a head, a valve, and a canister. The head is provided with a spray port connected to the valve and a spray handle for pressing the valve to open it. The valve includes a valve body, a valve cup, a valve core, a sealing ring, and a spring. The bottom of the valve body is provided with a feed nozzle connected to its valve cavity, and a feed pipe is connected to the feed nozzle. The valve core is located inside the valve cavity of the valve body, and includes a valve core seat and a valve core rod extending upward from the valve core seat. The bottom of the valve core seat is supported by the spring to provide an upward reset force. The valve core rod has a first channel passing through it along its central axis, and the first channel communicates with the valve cavity. The valve core rod passes through the valve cup and docks with the pressure gauge, thereby communicating the valve cavity and the pressure gauge via the first channel. An outer cylinder is fitted onto the valve core rod, and a second channel is formed between the inner wall of the outer cylinder and the outer wall of the valve core rod. The second channel communicates with the injection port. An outlet communicating with the second channel is provided at the bottom of the outer cylinder. The sealing ring is fitted onto the outer cylinder to seal the outlet. When the injection handle is pressed, it acts on the valve core rod to push the valve core downward, thereby causing the outlet and the sealing ring to be misaligned, so that the outlet and the valve cavity are connected.

[0004] In one or more embodiments of the present invention, the device head is provided with a first groove, the bottom surface of the first groove has a first through hole facing the valve and allowing the valve core rod to pass through, and a nozzle assembly is provided in the first groove; The nozzle assembly has a spray port at its front end and a insertion cavity at its rear end for inserting a valve core rod. The spray port and the insertion cavity are connected by a spray channel. The insertion cavity has a second through hole facing the valve and a third through hole facing the pressure gauge. The diameter of the second through hole is adapted to the outer cylinder to make the outer cylinder and the hole wall seal in contact. A step is provided on the hole wall of the second through hole for abutting the top edge of the outer cylinder. The valve core rod passes through the third through hole and connects with the pressure gauge. One end of the jetting handle is pivotally connected to the two groove walls of the first groove so that it flips around the pivot point, and the bottom of the jetting handle presses against the nozzle assembly.

[0005] In one or more embodiments of the present invention, symmetrical shaft holes are provided on the two side groove walls above the nozzle assembly in the first groove, convex shafts are provided on both sides of the injection pressure handle, and a pressing block that abuts against the nozzle assembly is provided at the bottom of the injection pressure handle.

[0006] In one or more embodiments of this utility model, the tail of the jet handle is inclined upward, and a gap is left between the first groove and the tail of the jet handle to meet its downward stroke. A removable latch is provided in the gap, and the latch is inserted into the gap to stop the tail of the jet handle from moving downward.

[0007] In one or more embodiments of this utility model, a connecting rod is provided between the valve core rod and the pressure gauge. The connecting rod includes a middle section and plug sections located at both ends of the middle section. The middle section and the plug sections are axially connected. The outer diameter of the middle section is adapted to the diameter of the third through hole to achieve a sealing contact. The plug section at the lower end of the connecting rod is inserted into the first channel of the valve core rod, and the plug section at the upper end of the connecting rod is connected to the pressure gauge.

[0008] In one or more embodiments of the present invention, the valve core seat has an inner cavity communicating with a first channel, the bottom of the inner cavity being open and communicating with a valve cavity, and a valve plug is provided in the inner cavity. The valve plug includes a plug body located in the inner cavity and a plug rod inserted into the first channel. The plug body is used to close the first channel when it abuts against the lower end of the first channel.

[0009] In one or more embodiments of the present invention, the stopper is partially cut longitudinally to form a cutout on the stopper extending from its top end to its bottom end, the cutout having an arc-shaped lower end face.

[0010] This utility model discloses a valve comprising a valve body, a valve cup, a valve core, a sealing ring, and a spring. The bottom of the valve body has a feed nozzle communicating with its valve cavity, and a feed tube is connected to the feed nozzle. The valve core is located within the valve cavity of the valve body and includes a valve core seat and a valve core rod extending upward from the valve core seat. The bottom of the valve core seat is supported by the spring to provide an upward reset force. The valve core rod has a first channel penetrating along its central axis, communicating with the valve cavity. An outer cylinder is fitted onto the valve core rod, and a second channel is formed between the inner wall of the outer cylinder and the outer wall of the valve core rod. An outlet communicating with the second channel is provided at the bottom of the outer cylinder. The sealing ring is fitted onto the outer cylinder to seal the outlet. When the valve core rod is pressed, it pushes the valve core downward, thereby causing the outlet and the sealing ring to be misaligned, thus communicating with the valve cavity.

[0011] In one or more embodiments of the present invention, the valve core seat has an inner cavity communicating with a first channel, the bottom of the inner cavity being open and communicating with a valve cavity, and a valve plug is provided in the inner cavity. The valve plug includes a plug body located in the inner cavity and a plug rod inserted into the first channel. The plug body is used to close the first channel when it abuts against the lower end of the first channel.

[0012] In one or more embodiments of the present invention, the stopper rod is partially cut longitudinally to form a cutout on the stopper rod extending from its top end to its bottom end.

[0013] Compared with the prior art, the advantages of this utility model include at least the following: 1) In line with the application requirements of portable aerosol fire extinguishers, this product uses a single or double-valve to replace the three-way copper valve on traditional fire extinguishers. It has the advantages of simple structure, reliability and low cost. Moreover, the aerosol valve sprays more evenly, can spray at any angle, and has an effective range of up to 4 meters, which can help users deal with emergencies more effectively.

[0014] 2) This product is equipped with a pressure gauge to measure the pressure of the fire extinguisher, which facilitates fire protection maintenance and inspection; based on the aerosol valve, the pressure measurement and spraying functions are realized through the independent first and second channels on the valve core. The nozzle assembly and pressure gauge can be assembled simply by plugging them into the valve core rod, which significantly improves assembly efficiency.

[0015] 3) This product's valve core is equipped with a valve plug (equivalent to a one-way valve) to ensure that the contents will not leak during canister use. Before the pressure gauge is assembled or when the pressure gauge is removed, the valve plug seals the first channel with its plug body to prevent the contents from spraying out, facilitating the assembly of the fire extinguisher or the replacement of the pressure gauge; when the pressure gauge (with connecting rod) is inserted into the valve core rod, the lower end of the connecting rod contacts the valve plug located in the first channel of the valve core rod, causing it to move downward, thereby opening the first channel to connect the valve chamber and the pressure gauge for pressure measurement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of an aerosol fire extinguisher.

[0017] Figure 2 This is a schematic diagram of the disassembled structure of the device head.

[0018] Figure 3 This is a schematic diagram of the internal assembly structure of the device head.

[0019] Figure 4 This is a schematic diagram of the exploded structure of a valve.

[0020] Figure 5 This is a cross-sectional structural diagram of an aerosol fire extinguisher.

[0021] Figure 6 This is a cross-sectional structural diagram of the assembly of the device head and valve.

[0022] Figure 7 for Figure 6 Enlarged view of part A.

[0023] Figure 8 This is a cross-sectional view of the nozzle assembly.

[0024] Figure 9 This is a cross-sectional view of the valve core.

[0025] Figure 10 This is a cross-sectional structural diagram of the device head and valve assembly state in another implementation structure. Detailed Implementation

[0026] The following is a further description of the scheme of this application with reference to the accompanying drawings: See appendix Figures 1 to 9 An aerosol fire extinguisher with a pressure gauge includes a head 1, a valve 2, a canister 3, and a pressure gauge 4. The valve 2 is installed on the canister 3 and adopts a two-component packaging valve structure. The canister 3 is provided with a bag 5 for storing the fire extinguishing contents. The head 1 is provided with a spray port 11 that communicates with the valve 2 and a spray handle 12 for pressing the valve 2 to open it. The pressure gauge 4 is connected to the valve 2.

[0027] Specifically: The valve 2 includes a valve body 21, a valve cup 22, a valve core 23, a sealing ring 24, and a spring 25. The bottom of the valve body 21 is connected to the bladder 5 and has a feed nozzle 211 that communicates with its valve cavity 20. A feed tube 26 is connected to the feed nozzle 211. The valve core 23 is located inside the valve cavity 20 of the valve body 21. It includes a valve core seat 231 and a valve core rod 232 extending upward from the valve core seat 231. The bottom of the valve core seat 231 is supported by the spring 25 to provide an upward reset force. The valve core rod 232 has a first channel 2321 that runs along its central axis and communicates with the valve cavity 20. The valve core rod 232 passes through the valve cup 22 and connects to the pressure gauge 4. The valve chamber 20 is connected to the pressure gauge 4 via the first channel 2321 to measure pressure. An outer cylinder 233 is fitted onto the valve core rod 232. A second channel 2331 is formed between the inner wall of the outer cylinder 233 and the outer wall of the valve core rod 232. The second channel 2331 communicates with the injection port 11. An outlet 2332 communicating with the second channel 2331 is provided at the bottom of the outer cylinder 233. The sealing ring 24 is fitted onto the outer cylinder 233 to seal the outlet. When the injection handle 12 is pressed, it acts on the valve core rod 232 to push the valve core 23 downward, thereby causing the outlet 2332 and the sealing ring 24 to be misaligned, so that the outlet 2332 communicates with the valve chamber 20.

[0028] The head 1 is provided with a first groove 13. The bottom surface of the first groove 13 has a first through hole 131 that faces the valve 2 and allows the valve core rod 232 to pass through. A nozzle assembly 14 is provided in the first groove 13. The front end of the nozzle assembly 14 is provided with the injection port 11. The rear end of the nozzle assembly 14 is provided with a insertion cavity 141 for the valve core rod 232 to be inserted. The injection port 11 and the insertion cavity 141 are connected by an injection channel 142. The insertion cavity 141 has a second through hole 143 facing the valve 2 and a third through hole 144 facing the pressure gauge 4. The diameter of the second through hole 143 is adapted to the outer cylinder 233 so that the outer cylinder 233 is in sealed contact with the hole wall after insertion. A step 1431 for abutting the top edge of the outer cylinder 233 is provided on the hole wall of the second through hole 143.

[0029] A connecting rod 26 is provided between the valve core rod 232 and the pressure gauge 4. The connecting rod 26 includes a middle section 261 and insertion sections 262 located at both ends of the middle section 261. The middle section 261 and the insertion sections 262 are axially connected. The outer diameter of the middle section 261 is adapted to the diameter of the third through hole 144 to achieve a sealed contact when it is inserted. The insertion section 262 at the lower end of the connecting rod 26 is inserted into the first channel 2321 of the valve core rod 232, and the insertion section 262 at the upper end of the connecting rod 26 is inserted into the connecting channel at the bottom of the pressure gauge 4. Normally, the connecting rod 26 is fixed to the pressure gauge 4. The spray handle 12 on the head 1 has a window that runs vertically through it to expose the third perforation 144. After the fire extinguisher head 1, valve 2 and tank 3 are assembled and the contents are filled, the connecting rod 26 is aligned through the window and inserted into the third perforation 144. Then, the insertion section 262 at its lower end is inserted into the first channel 2321 of the valve core rod 232, and then the connection is achieved by tightening.

[0030] This product is equipped with a pressure gauge 4 to measure the pressure of the fire extinguisher, facilitating fire protection maintenance and troubleshooting. Based on the aerosol valve, the pressure measurement and spraying functions are achieved separately through the independent first channel 2321 and second channel 2331 on the valve core 23. The nozzle assembly 14 and pressure gauge 4 can be assembled simply by inserting them into the valve core rod 232, significantly improving assembly efficiency. Furthermore, replacing the traditional three-way copper valve on a fire extinguisher with an aerosol valve (binary packaging valve) offers advantages such as simple structure, reliability, and low cost. The aerosol valve also provides more uniform spray, can spray at any angle, and has an effective range of up to 4 meters, helping users respond more effectively to emergencies.

[0031] Furthermore, the valve core seat 231 has an inner cavity 2311 that communicates with the first channel 2321. The bottom of the inner cavity 2311 is open and communicates with the valve cavity 20. A valve plug 27 is provided in the inner cavity 2311. The valve plug 27 includes a plug body 271 located in the inner cavity 2311 and a plug rod 272 that penetrates into the first channel 2321. The plug body 271 is used to close the first channel 2321 when it abuts against the lower end of the first channel 2321.

[0032] The valve core seat 231 contains a valve plug 27, which acts as a one-way valve. Before docking with the pressure gauge 4 or when the pressure gauge 4 is removed, the valve plug 27's plug body 271 is pushed against the top of the inner cavity 2311 under the pressure inside the valve, thus sealing the first channel 2321 and preventing the contents from spraying out, ensuring that the contents will not leak during canning. After canning is completed, the pressure gauge 4 with the docking rod 26 is aligned with the first channel 2321 of the valve core rod 232 and screwed in. The lower end of the docking rod 26 presses down the plug rod 272, thereby pushing the plug body 271 away from the top of the inner cavity 2311, opening the first channel 2321, thus allowing the valve cavity 20 and the pressure gauge 4 to communicate and achieve pressure measurement.

[0033] To ensure the flowability of the contents within the first channel 2321, the stopper rod 272 is partially cut longitudinally to form a cutout 272a extending from its top to its bottom. The cutout 272a has an arc-shaped lower end face 272b. This ensures that even when the top of the stopper rod 272 abuts against the connecting rod 26, there is still sufficient space for the contents to flow into the pressure gauge 4. Furthermore, the cutout 272a makes the end of the stopper rod 272 thinner, making it easier for it to penetrate the first channel 101 under the pressure within the valve.

[0034] Furthermore, one end of the injection handle 12 is pivotally connected to the two groove walls of the first groove 13 so that it can be flipped around the pivot point, and the bottom of the injection handle 12 presses against the nozzle assembly 14. Specifically: symmetrical shaft holes 15 are provided on the two groove walls above the nozzle assembly 14 in the first groove 13; convex shafts 121 are provided on both sides of the injection handle 12; the bottom of the injection handle 12 is provided with a pressing block 122 that abuts against the nozzle assembly 14; and receiving platforms 145 that cooperate with the pressing blocks 122 are provided on both sides of the nozzle assembly 14. The two receiving platforms 145 are radially symmetrical relative to the third through hole 144 to ensure that when the injection handle 12 is pressed down, the nozzle assembly 14 allows the valve core rod 232 to have a vertical downward stroke, ensuring smooth pressing operation.

[0035] Furthermore, the tail 123 of the spray handle 12 is inclined upwards, and a gap 100 is left between the first groove 13 and the tail 123 of the spray handle 12 to meet its downward stroke. A removable locking pin 6 is provided in the gap 100. The locking pin 6 is inserted into the gap 100 to stop the tail 123 of the spray handle 12 from moving downwards, thereby locking the fire extinguisher. The locking pin 6 includes a base with a pull ring 61, and an upper clamping part 62 and a lower clamping part 63 extending from the base. The upper clamping part 62 and the lower clamping part 63 clamp the tail 123 of the spray handle 12, and the bottom of the lower clamping part abuts against the first groove 13 to fill the gap 100. Anti-slip teeth 124 for interlocking are provided on the upper clamping part 62 and the tail 123 of the spray handle 12 to prevent the locking pin 6 from disengaging naturally.

[0036] See appendix Figure 10 In another embodiment of this utility model, the valve 2 is a single-unit packaging valve, which includes a valve body 21, a valve cup 22, a valve core 23, a sealing ring 24, and a spring 25. The bottom of the valve body 21 is only provided with a feed nozzle 211 that connects to its valve cavity 20. A feed pipe 26 is connected to the feed nozzle 211, and the feed pipe 26 connects to the fire extinguishing contents stored in the tank 3. The remaining structure is the same as in the above embodiment and will not be described again here.

[0037] It is evident that this utility model can be implemented based on a single or dual-element packaging valve to meet the spraying requirements of different fire extinguishing contents. Moreover, the pressure gauge 4 is easy to screw on and off, and can be disassembled at any time without affecting the normal use of the fire extinguisher.

[0038] The above preferred embodiments should be regarded as illustrative examples of the embodiments of the present application. Any technical deductions, substitutions, improvements, etc. that are similar to or based on the present application should be considered within the scope of protection of this patent.

Claims

1. An aerosol fire extinguisher with a pressure gauge, comprising a head, a valve, and a canister, wherein the head is provided with a spray port communicating with the valve and a spray handle for pressing the valve to open it, characterized in that: The valve includes a valve body, a valve cup, a valve core, a sealing ring, and a spring. The bottom of the valve body is provided with a feed nozzle that communicates with its valve cavity, and a feed tube is connected to the feed nozzle. The valve core is located inside the valve cavity of the valve body, and includes a valve core seat and a valve core rod extending upward from the valve core seat. The bottom of the valve core seat is supported by the spring to provide an upward reset force. The valve core rod has a first channel passing through it along its central axis, and the first channel communicates with the valve cavity. The valve core rod passes through the valve cup and docks with the pressure gauge, thereby communicating the valve cavity and the pressure gauge via the first channel. An outer cylinder is fitted onto the valve core rod, and a second channel is formed between the inner wall of the outer cylinder and the outer wall of the valve core rod. The second channel communicates with the injection port. An outlet communicating with the second channel is provided at the bottom of the outer cylinder. The sealing ring is fitted onto the outer cylinder to seal the outlet. When the injection handle is pressed, it acts on the valve core rod to push the valve core downward, thereby causing the outlet and the sealing ring to be misaligned, so that the outlet and the valve cavity are connected.

2. The aerosol fire extinguisher with a pressure gauge according to claim 1, characterized in that: The device head is provided with a first groove, the bottom surface of the first groove has a first through hole that is directly opposite the valve and allows the valve core rod to pass through, and a nozzle assembly is provided in the first groove; The nozzle assembly has a spray port at its front end and a insertion cavity at its rear end for inserting a valve core rod. The spray port and the insertion cavity are connected by a spray channel. The insertion cavity has a second through hole facing the valve and a third through hole facing the pressure gauge. The diameter of the second through hole is adapted to the outer cylinder to make the outer cylinder and the hole wall seal in contact. A step is provided on the hole wall of the second through hole for abutting the top edge of the outer cylinder. The valve core rod passes through the third through hole and connects with the pressure gauge. One end of the jetting handle is pivotally connected to the two groove walls of the first groove so that it flips around the pivot point, and the bottom of the jetting handle presses against the nozzle assembly.

3. The aerosol fire extinguisher with a pressure gauge according to claim 2, characterized in that: The first groove has symmetrical shaft holes on the two sides of the groove wall above the nozzle assembly. The two sides of the injection handle are respectively provided with convex shafts, and the bottom of the injection handle is provided with a pressing block that abuts against the nozzle assembly.

4. The aerosol fire extinguisher with a pressure gauge according to claim 3, characterized in that: The tail of the jet press is tilted upward, and there is a gap between the first groove and the tail of the jet press to meet its downward stroke. A latch that can be pulled out is provided in the gap, and the latch is inserted into the gap to stop the tail of the jet press from moving downward.

5. The aerosol fire extinguisher with a pressure gauge according to claim 2, characterized in that: A connecting rod is provided between the valve core rod and the pressure gauge. The connecting rod includes a middle section and plug sections located at both ends of the middle section. The middle section and the plug sections are axially connected. The outer diameter of the middle section is adapted to the diameter of the third through hole to achieve a sealing contact. The plug section at the lower end of the connecting rod is inserted into the first channel of the valve core rod, and the plug section at the upper end of the connecting rod is connected to the pressure gauge.

6. The aerosol fire extinguisher with a pressure gauge according to claim 5, characterized in that: The valve core seat has an inner cavity that communicates with the first channel. The bottom of the inner cavity is open and communicates with the valve cavity. A valve plug is provided in the inner cavity. The valve plug includes a plug body located in the inner cavity and a plug rod that extends into the first channel. The plug body is used to close the first channel when it abuts against the lower end of the first channel.

7. The aerosol fire extinguisher with a pressure gauge according to claim 6, characterized in that: The stopper is partially cut longitudinally to form a cutout on the stopper extending from its top end to its bottom end, the cutout having an arc-shaped lower end face.

8. A valve, characterized in that: The device includes a valve body, a valve cup, a valve core, a sealing ring, and a spring. The bottom of the valve body has a feed nozzle that communicates with its valve cavity, and a feed tube is connected to the feed nozzle. The valve core is located inside the valve cavity of the valve body and includes a valve core seat and a valve core rod extending upward from the valve core seat. The bottom of the valve core seat is supported by the spring to provide an upward reset force. The valve core rod has a first channel that runs through its central axis and communicates with the valve cavity. An outer cylinder is fitted onto the valve core rod, and a second channel is formed between the inner wall of the outer cylinder and the outer wall of the valve core rod. An outlet communicating with the second channel is provided at the bottom of the outer cylinder. The sealing ring is fitted onto the outer cylinder to seal the outlet. When the valve core rod is pressed, it pushes the valve core downward, thereby causing the outlet and the sealing ring to be misaligned, thus communicating with the valve cavity.

9. The valve according to claim 8, characterized in that: The valve core seat has an inner cavity that communicates with the first channel. The bottom of the inner cavity is open and communicates with the valve cavity. A valve plug is provided in the inner cavity. The valve plug includes a plug body located in the inner cavity and a plug rod that extends into the first channel. The plug body is used to close the first channel when it abuts against the lower end of the first channel.

10. The valve according to claim 9, characterized in that: The stopper rod is partially cut longitudinally to form a hollow portion extending from its top end to its bottom end.

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