A fire service positive pressure breathing apparatus high pressure inflation apparatus and method

Abstract

The application discloses a kind of fire positive pressure breathing apparatus high-pressure inflation equipment and method, it is related to fire rescue field, including support frame, the support frame is installed with openable and closable explosion-proof filling cabinet, and the explosion-proof filling cabinet is used to place the gas cylinder of positive pressure breathing apparatus;Two compression pumps are installed at the top of the support frame, and the two compression pumps are used to alternate operation to inflate the positive pressure breathing apparatus;Water cooling device is symmetrically arranged on the two sides of the explosion-proof filling cabinet, and the water cooling device is used to water-cool and radiate the gas pipeline.The application is alternated by double compression pump cooperation and continuously inflated to the gas cylinder, meets the pressure requirement;While it can reduce the outlet gas temperature, ensure the safety and stability of inflation process.

Description

Technical Field

[0001] This invention relates to the field of fire rescue, and in particular to a high-pressure inflation device and method for a positive-pressure breathing apparatus for fire fighting. Background Technology

[0002] Positive pressure breathing apparatus (PPB) is an essential piece of equipment to ensure the safe breathing of firefighters in hazardous locations. Its air cylinder stores compressed air at a pressure of 30 MPa. After use, the cylinder needs to be refilled for future use. Existing refilling equipment typically uses a three-cylinder, three-stage compressor driven by an electric motor. The compressor, driven by a belt pulley, compresses and outputs high-temperature, high-pressure air. The compressor's input shaft pulley is shaped like a fan blade, acting as a cooling fan to dissipate heat from the output high-temperature gas.

[0003] Although the high-pressure pipeline is coiled and placed in front of the fan to improve heat dissipation, the high pressure ratio and large heat generation mean that this method alone has very limited cooling effect, causing the temperature of the high-pressure gas inside the pipeline to rise continuously. High temperatures cause the cylinder and piston to expand, accelerating the wear of the seals. Simultaneously, the one-way valve gasket softens and enlarges at high temperatures, resulting in poor sealing. Furthermore, this type of compressor cannot operate continuously, requiring frequent maintenance and replacement of various wear parts. The final stage high-pressure cylinder and piston also need periodic replacement, making it a bottleneck in the overall machine's lifespan.

[0004] In addition, because the temperature of the exhaust gas at the end is very high, although the pressure displayed when the gas cylinder is filled reaches the standard, after a period of cooling, the pressure inside the cylinder will decrease as the temperature drops. For example, after being filled to 30 MPa and cooled to room temperature, the pressure will drop to about 25 MPa, which cannot meet the pressure requirements of the gas cylinder. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a high-pressure inflation device and method for fire-fighting positive-pressure breathing apparatus. This method uses dual compression pumps to alternately and continuously inflate the gas cylinder to meet pressure requirements. At the same time, it can reduce the outlet gas temperature, ensuring the safety and stability of the inflation process.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, embodiments of the present invention provide a high-pressure inflation device for a fire-fighting positive-pressure breathing apparatus, comprising a support frame, wherein the support frame is equipped with an openable and closable explosion-proof filling cabinet, the explosion-proof filling cabinet being used to hold the gas cylinder of the positive-pressure breathing apparatus; two compression pumps are installed on the top of the support frame, the two compression pumps being used to alternately operate to inflate the positive-pressure breathing apparatus; and water-cooling devices are symmetrically arranged on both sides of the explosion-proof filling cabinet, the water-cooling devices being used to cool and dissipate heat from the gas pipeline.

[0007] As a further implementation, the water cooling device includes a cooling water tank and a water-cooled heat dissipation tank, and the compression pump is connected to a gas pipeline, which is spirally distributed on the inner wall of the cooling water tank. The gas pipeline is connected to a water-cooled heat sink at the end for exchanging heat with the circulating cooling water.

[0008] As a further implementation, the water-cooled heat sink is connected to the cooling water inlet of the compressor pump via a first cooling water pipe, and the cooling water outlet of the compressor pump is connected to the cooling water tank via a second cooling pipe.

[0009] As a further implementation, a cylinder is connected to the bottom of the explosion-proof filling cabinet. The cylinder is installed in an inclined state within the support frame and is used to push the explosion-proof filling cabinet to open to a set angle.

[0010] As a further implementation, the explosion-proof filling cabinet is provided with limit blocks on both sides, and the support frame is connected to a limit beam. When the limit block contacts the limit beam, the explosion-proof filling cabinet opens to its maximum angle.

[0011] As a further implementation, the explosion-proof filling cabinet includes a support plate, and a placement compartment is fixed inside the support plate, with several heat dissipation holes in the placement compartment.

[0012] As a further implementation, a pressure gauge is provided above the explosion-proof filling cabinet, which is used to monitor the inflation pressure.

[0013] Secondly, embodiments of the present invention also provide a high-pressure inflation method for a fire-fighting positive-pressure breathing apparatus, employing the aforementioned high-pressure inflation equipment, comprising: The water cooling device is started, and the explosion-proof charging cabinet is closed; the controller starts the compressor pump A, and the compressor pump A delivers high-pressure gas to the gas pipeline according to the set flow rate; the gas pipeline is cooled by the cooling water tank, and then exchanges heat with the circulating cooling water in the water-cooled heat sink for a second time. After a set time of continuous operation, the controller issues a switching command, causing compressor pump A to gradually reduce its frequency and load, while compressor pump B synchronously increases its frequency and load, putting compressor pump A into standby mode, and compressor pump B continues to fill the air cylinder of the fire-fighting positive pressure breathing apparatus.

[0014] As a further implementation, when the exhaust temperature of compressor pump A exceeds the warning threshold, the controller controls the water-cooled heat sink to increase the circulating water flow and starts compressor pump B.

[0015] As a further implementation, when the pressure sensor detects that the air cylinder of the fire-fighting positive pressure breathing apparatus has reached a set threshold, the controller immediately cuts off the air supply output of the compression pump A.

[0016] The beneficial effects of this invention are as follows: (1) This invention is based on hydraulic drive and uses two compression pumps to achieve alternating and continuous inflation of the gas cylinder of the fire-fighting positive pressure breathing apparatus, thereby improving inflation efficiency; and adds a forced water cooling circulation system, which, through the cooperation of cooling water tank and water cooling heat dissipation tank, can significantly reduce the outlet gas temperature and ensure good inflation effect.

[0017] (2) During the inflation process, the gas cylinder of the positive pressure breathing apparatus is in a closed explosion-proof filling cabinet, which plays a role in isolation and protection, ensuring safety during the inflation process; the explosion-proof filling cabinet has a maximum opening angle, which facilitates the insertion and removal of the gas cylinder.

[0018] (3) During the gas cylinder filling process, the present invention achieves balanced load distribution of the two compression pumps through coordinated control of conventional duration triggering, abnormal parameter triggering, and pressure holding stage triggering, thereby avoiding overload and pump chamber overheating caused by long-term continuous high load operation of a single pump and extending the overall service life of the compression pump. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] Figure 1 This invention relates to a three-dimensional high-pressure air filling device according to one or more embodiments. Figure 1 ; Figure 2 This invention relates to a three-dimensional high-pressure air filling device according to one or more embodiments. Figure 2 .

[0021] The components include: 1. Support frame; 2. Explosion-proof filling cabinet; 3. Compression pump A; 4. Compression pump B; 5. Cooling water tank; 6. Water-cooled heat sink; 7. Gas pipeline; 8. First cooling water pipeline; 9. Second cooling water pipeline; 10. Cylinder; 11. Limiting block; 12. Limiting beam; 13. Door lock tongue; 14. Bearing plate; 15. Placement compartment; and 16. Heat dissipation hole. Detailed Implementation

[0022] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] Example 1: This embodiment provides a high-pressure air filling device for a fire-fighting positive-pressure breathing apparatus, such as... Figure 1 and Figure 2As shown, the device includes a support frame 1, which is enclosed by a shell (not shown). An explosion-proof filling cabinet 2, which can be opened and closed, is installed on one side of the support frame 1. The explosion-proof filling cabinet 2 is used to hold the gas cylinder of the positive pressure breathing apparatus. Two compressor pumps are installed on the top of the support frame 1, and these pumps operate alternately to inflate the positive pressure breathing apparatus. During the inflatation process, the explosion-proof filling cabinet 2 is closed. Water-cooling devices are symmetrically arranged on both sides of the explosion-proof filling cabinet 2 to cool the gas pipeline 7.

[0024] For ease of explanation later, in this embodiment, one of the compression pumps will be referred to as compression pump A3 and the other as compression pump B4. Each compression pump is equipped with a water cooling system to ensure effective heat dissipation during operation.

[0025] Specifically, the water-cooling device consists of two main parts: a cooling water tank 5 and a water-cooled heat sink 6. Each compressor pump is connected to the cooling system via an independent gas pipeline 7. The gas pipeline 7 is arranged in a spiral pattern on the inner wall of the cooling water tank 5, which can effectively extend the flow path of the gas in the cooling area, significantly increase the contact area between the gas and the cooling water, and further improve the heat exchange efficiency.

[0026] The gas pipeline 7 is connected to the water-cooled heat exchanger 6 at its end. The water-cooled heat exchanger 6 has a high-efficiency heat exchange structure inside, which can fully contact and exchange heat with the circulating cooling water, thereby effectively removing heat from the gas. The water-cooled heat exchanger 6 is connected to the cooling water inlet of the compressor pump through the first cooling water pipeline 8. At the same time, the cooling water outlet of the compressor pump is connected to the cooling water tank 5 through the second cooling pipeline, so that the cooling water after heat exchange can flow back to the cooling water tank 5 for cooling treatment. This forms a closed and continuous cooling water circulation system to ensure the continuous and stable operation of the entire device.

[0027] like Figure 1 and Figure 2 As shown, the bottom of the explosion-proof filling cabinet 2 is connected to the cylinder 10. The cylinder 10 is installed in the support frame 1 at a certain angle. The cylinder 10 can provide sufficient thrust to smoothly push the explosion-proof filling cabinet 2 open to a preset specific angle, which facilitates the safe placement and removal of positive pressure breathing apparatus by the operator.

[0028] The main structure of the explosion-proof filling cabinet 2 is an L-shaped support plate 14. The inner side of the support plate 14 has a support platform. A placement compartment 15 is installed via the support platform and the inner wall of the support plate 14. The internal cavity shape of the placement compartment 15 is adapted to the gas cylinder of the positive pressure respirator. The telescopic end of the cylinder 10 is connected to the lower side of the placement compartment 15, and the fixed end of the cylinder 10 is installed on the top surface of the support frame 1. Multiple heat dissipation holes 16 are provided on the surface of the placement compartment 15 to dissipate heat generated during the inflation process of the positive pressure respirator, improving inflation safety.

[0029] To meet explosion-proof performance requirements, the explosion-proof filling cabinet 2 is made of materials such as Q355 carbon steel and 304 stainless steel, and the opening and closing parts of the explosion-proof filling cabinet 2 can be equipped with an explosion-proof sealing structure. like Figure 1 As shown, limit blocks 11 are installed on both sides of the explosion-proof filling cabinet 2, and the limit blocks 11 are installed near the lower side of the bearing plate 14; the support frame 1 is connected to the limit beam 12, and the limit beam 12 is located at a certain height from the bottom surface of the support frame 1. During the rotation of the explosion-proof filling cabinet 2, when the limit block 11 contacts the limit beam 12, the explosion-proof filling cabinet 2 is in the maximum open state, that is, in the maximum opening angle relative to the vertical plane.

[0030] In this embodiment, the maximum opening angle is limited to 60°±5°. This is to prevent the cabinet's center of gravity from shifting outward and causing the equipment to tip over, and to prevent excessive stretching of the connecting pipes. At the same time, this angle range allows the operator to pick up and put down the respirator cylinder while standing.

[0031] Door latches 13 are installed on both sides near the top of the explosion-proof filling cabinet 2 to facilitate quick closing of the cabinet. A pressure gauge is installed on top of the cabinet to monitor the inflation pressure, ensuring the safety and stability of the inflation process.

[0032] This embodiment is based on hydraulic drive, using two compression pumps to achieve alternating and continuous inflation of the fire-fighting positive pressure breathing apparatus cylinders, improving inflation efficiency. A forced water-cooling circulation system is added, with cooling water tank 5 and water-cooled heat dissipation box 6 working together to significantly reduce the outlet gas temperature. In this embodiment, the cylinders are housed in a closed explosion-proof filling cabinet 2 during inflation, providing isolation and protection to ensure safety during the inflation process.

[0033] Example 2: This embodiment provides a high-pressure inflation method for a fire-fighting positive-pressure breathing apparatus, employing the high-pressure inflation equipment described in Embodiment 1, including: The water-cooling device is officially started and running, and at the same time, cylinder 10 pulls the explosion-proof charging cabinet to safely shut it down. The controller starts the compressor pump A3, which stably delivers high-pressure gas to the gas pipeline 7 according to the preset precise flow parameters. After the high-pressure gas flows through the gas pipeline 7, it first undergoes preliminary cooling treatment through the cooling water tank 5, and then enters the water-cooled heat dissipation tank 6 to fully exchange heat with the circulating cooling water, ensuring that the gas temperature is effectively controlled.

[0034] After compressor pump A3 reaches the preset continuous operating time, the controller issues a switching command. Compressor pump A3 then gradually reduces its operating frequency and workload according to the set program. Simultaneously, compressor pump B4 starts up and gradually increases its operating frequency and workload, achieving a smooth transition between the two compressor pumps. Through this coordinated control process, compressor pump A3 enters standby mode, while compressor pump B4 completely takes over the inflation work, continuing to provide a continuous air supply to the cylinders of the fire-fighting positive pressure breathing apparatus.

[0035] The above process is a normal duration triggering of the alternating operation of compression pump A3 and compression pump B4.

[0036] In case of abnormal situations, after compressor pump A3 has been running for a certain period of time, the temperature sensor detects that the exhaust temperature of compressor pump A3 exceeds the warning threshold. At the same time, the outlet water temperature of the water cooling system approaches its warning threshold. The controller immediately triggers a dual action, controlling the water cooling heat sink 6 to increase the circulating water flow rate to enhance water cooling; and starts compressor pump B4. Compressor pump A3 is reduced to a shutdown state within a short period of time, and compressor pump B4 is simultaneously increased in load to take over the work of compressor pump A3.

[0037] When the inflation pressure approaches the set threshold, a pressure-maintaining relay operation is initiated to prevent overpressure. For example, during the operation of compressor pump B4, if the inflation pressure of the fire-fighting positive-pressure breathing apparatus cylinder approaches the set threshold, the inflation rate needs to be reduced. The controller initiates an alternation program, reducing the load on compressor pump B4 while simultaneously starting and increasing the load on compressor pump A3. When the pressure sensor detects that the fire-fighting positive-pressure breathing apparatus cylinder has reached the set threshold, the controller immediately cuts off the air supply output of compressor pump A3.

[0038] This embodiment achieves balanced load distribution between the two compressor pumps through coordinated control via conventional duration triggering, abnormal parameter triggering, and pressure holding phase triggering. This avoids overload and pump chamber overheating problems caused by long-term continuous high-load operation of a single pump, thus extending the overall service life of the compressor pumps. The dual-pump alternating design provides redundancy; when one compressor pump experiences abnormalities such as overheating or overload, the other pump can quickly take over, preventing interruptions in inflation operations. This is particularly suitable for scenarios with high inflation efficiency requirements, such as fire rescue.

[0039] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high-pressure inflation device for a positive-pressure breathing apparatus for fire fighting, characterized in that, The device includes a support frame on which an openable explosion-proof filling cabinet is installed. The explosion-proof filling cabinet is used to hold the gas cylinders of a positive pressure breathing apparatus. Two compressor pumps are installed on the top of the support frame. The two compressor pumps are used to alternately operate to fill the positive pressure breathing apparatus. Water cooling devices are symmetrically arranged on both sides of the explosion-proof filling cabinet. The water cooling devices are used to cool the gas pipeline.

2. The high-pressure air filling device for a fire-fighting positive-pressure breathing apparatus according to claim 1, characterized in that, The water cooling device includes a cooling water tank and a water-cooled heat dissipation tank. The compression pump is connected to a gas pipeline, and the gas pipeline is spirally distributed on the inner wall of the cooling water tank. The gas pipeline is connected to a water-cooled heat sink at the end for exchanging heat with the circulating cooling water.

3. The high-pressure air filling device for a fire-fighting positive-pressure breathing apparatus according to claim 2, characterized in that, The water-cooled heat sink is connected to the cooling water inlet of the compressor pump via a first cooling water pipe, and the cooling water outlet of the compressor pump is connected to the cooling water tank via a second cooling pipe.

4. The high-pressure air filling device for a fire-fighting positive-pressure breathing apparatus according to claim 1, characterized in that, The bottom of the explosion-proof filling cabinet is connected to a cylinder, which is installed in an inclined state within the support frame. The cylinder is used to push the explosion-proof filling cabinet to open to a set angle.

5. The high-pressure air filling device for a fire-fighting positive-pressure breathing apparatus according to claim 4, characterized in that, The explosion-proof filling cabinet is provided with limit blocks on both sides, and the support frame is connected to a limit beam. When the limit block contacts the limit beam, the explosion-proof filling cabinet opens to its maximum angle.

6. A high-pressure inflation device for a fire-fighting positive-pressure breathing apparatus according to claim 1 or 4, characterized in that, The explosion-proof filling cabinet includes a support plate, and a placement compartment is fixed inside the support plate. The placement compartment has several heat dissipation holes.

7. A high-pressure air filling device for a fire-fighting positive-pressure breathing apparatus according to claim 1 or 4, characterized in that, A pressure gauge is installed above the explosion-proof filling cabinet, and the pressure gauge is used to monitor the inflation pressure.

8. A high-pressure inflation method for a fire-fighting positive-pressure breathing apparatus, characterized in that, The high-pressure air filling device as described in any one of claims 1-7 includes: The water cooling device is started, and the explosion-proof charging cabinet is closed; the controller starts the compressor pump A, and the compressor pump A delivers high-pressure gas to the gas pipeline according to the set flow rate; the gas pipeline is cooled by the cooling water tank, and then exchanges heat with the circulating cooling water in the water-cooled heat sink for a second time. After a set time of continuous operation, the controller issues a switching command, causing compressor pump A to gradually reduce its frequency and load, while compressor pump B synchronously increases its frequency and load, putting compressor pump A into standby mode, and compressor pump B continues to fill the air cylinder of the fire-fighting positive pressure breathing apparatus.

9. A high-pressure inflation method for a fire-fighting positive-pressure breathing apparatus according to claim 8, characterized in that, When the exhaust temperature of compressor pump A exceeds the warning threshold, the controller controls the water-cooled heat sink to increase the circulating water flow and starts compressor pump B.

10. A high-pressure inflation method for a fire-fighting positive-pressure breathing apparatus according to claim 8, characterized in that, When the pressure sensor detects that the air cylinder of the fire-fighting positive pressure breathing apparatus has reached the set threshold, the controller immediately cuts off the air supply output of the compressor pump A.

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