A high pressure gas pressure reducing valve for a closed circuit diving rebreather

Abstract

This utility model discloses a high-pressure gas pressure reducing valve for a closed-circuit diving respirator, comprising a frame, a primary pressure reducing mechanism, a secondary pressure reducing mechanism, and an environmental pressure sensing and regulating mechanism. A high-pressure connector is located at the lower part of the frame, connecting to the air inlet channel. Above the air inlet channel is a primary pressure reducing chamber. Through the coordinated action of a pressure-reducing diaphragm, an elastic conduit, a first spring, and a sealing valve core, the secondary pressure reducing chamber, connected to the sealing valve core, further reduces gas pressure, outputting the gas to the outlet channel, outlet port, and exhalation outlet. A sealing component is provided at the exhalation outlet to ensure safe gas supply. A support and a first frame are provided outside the secondary pressure reducing chamber. An environmental pressure sensing chamber is installed on the frame, allowing for fine adjustment of the gas flow rate through a microfluidic channel. This structure combines multi-stage pressure stabilization with an external environmental feedback regulation mechanism, offering advantages such as compact structure, sensitive response, and precise pressure regulation, making it suitable for complex diving operating environments.

Description

Technical Field

[0001] This utility model relates to the field of diving equipment technology, specifically to a high-pressure gas pressure reducing valve for a closed-loop diving breathing apparatus. Background Technology

[0002] A high-pressure gas pressure reducing valve for closed-circuit diving respirators is a widely used piece of professional equipment in diving activities. It recovers the diver's exhaled gas and replenishes an appropriate amount of oxygen, so that the entire breathing process takes place in a relatively closed system, thereby significantly extending the underwater stay time, reducing gas consumption, and reducing the amount of bubble emission. It is suitable for military diving, technical diving, and underwater operations in high-risk environments. However, existing pressure reducing valves for closed-circuit diving respirators still have problems such as unreliable sealing, complex structure and inconvenient maintenance, insufficient protective performance, and weak micro-adjustment capability. Utility Model Content

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a high-pressure gas pressure reducing valve for a closed-circuit diving respirator. This valve, through its cooperation with a primary pressure reducing chamber, a pressure reducing diaphragm, an elastic conduit, a first spring, and a secondary pressure reducing chamber, releases high-pressure gas in stages, avoiding the instability of airflow and pressure fluctuations that occur with single-stage pressure reduction. It achieves rapid dynamic response to pressure changes, allowing the sealing valve core to adjust in real time, effectively controlling gas flow, preventing gas supply interruption or over-supply, and improving the stability and comfort of the breathing process. Through its cooperation with an environmental pressure sensing chamber, a first diaphragm, a microfluidic channel, and a throttling valve, the valve enhances the fine-tuning capability of the gas flow.

[0004] This utility model also provides a high-pressure gas pressure reducing valve for a closed-circuit diving respirator, comprising: a frame, a high-pressure connector fixedly connected to the lower surface of the frame, an air inlet channel fixedly connected to the outer surface of the high-pressure connector, a primary pressure reducing chamber fixedly connected to the upper surface of the air inlet channel, a pressure reducing diaphragm fixedly connected to the outer surface of the primary pressure reducing chamber, an elastic conduit fixedly connected to the outer surface of the pressure reducing diaphragm, a first spring fixedly connected to the outer surface of the elastic conduit, a sealing valve core fixedly connected to the upper surface of the first spring, a secondary pressure reducing chamber fixedly connected to the outer surface of the sealing valve core, an air outlet channel fixedly connected to the outer surface of the secondary pressure reducing chamber, an output interface fixedly connected to the rear surface of the air outlet channel, and an exhalation outlet provided on the outer surface of the output interface; a first support on the outer surface of the secondary pressure reducing chamber, a first frame fixedly connected to the outer surface of the first support, an environmental pressure sensing chamber fixedly connected to the outer surface of the first frame, a first diaphragm fixedly connected to the lower surface of the environmental pressure sensing chamber, a throttle valve fixedly connected to the outer surface of the first diaphragm, and a microflow channel fixedly connected to the outer surface of the throttle valve.

[0005] According to this utility model, a high-pressure gas pressure reducing valve for a closed-circuit diving respirator is provided, wherein a one-way drain port is fixedly connected to the lower surface of the frame, and a first mounting cover is rotatably connected to the lower surface of the one-way drain port. These components facilitate the removal of excess water from the pressure reducing valve.

[0006] According to this utility model, a high-pressure gas pressure reducing valve for a closed-circuit diving respirator is provided. A heating pad is fixedly connected to the lower surface of the first frame, and the heating pad is fixedly connected to the front surface of the first support. These components prevent the pressure reducing valve from malfunctioning in low-temperature environments.

[0007] According to this utility model, a high-pressure gas pressure reducing valve for a closed-circuit diving breathing apparatus is provided, wherein a pressure gauge is fixedly connected to the top of the inner surface of the frame. These components facilitate the monitoring of the internal air pressure of the pressure reducing valve, preventing damage to the device due to excessive pressure.

[0008] According to this utility model, a high-pressure gas pressure reducing valve for a closed-circuit diving breathing apparatus is provided. A slag removal port is fixedly connected to the bottom surface of the frame, and a second mounting cover is rotatably connected to the slag removal port. These components remove impurities and floating debris that may be mixed into the water.

[0009] According to this utility model, a high-pressure gas pressure reducing valve for a closed-circuit diving breathing apparatus is provided, wherein an air filter is fixedly connected to the inner surface of the exhalation outlet, and a sealing ring is fixedly connected to the outer surface of the exhalation outlet. These components enhance the airtightness of the device.

[0010] According to this utility model, a high-pressure gas pressure reducing valve for a closed-circuit diving respirator is provided, wherein a protective ring is fixedly connected to the outer surface of the outlet channel, and a needle valve is fixedly connected to the rear surface of the protective ring. These components facilitate control of the flow rate in the microfluidic channel.

[0011] According to the present invention, a high-pressure gas pressure reducing valve for a closed-circuit diving respirator is provided, wherein a sealing gasket is fixedly connected to the outer surface of the first frame, and the sealing gasket is fixedly connected to the frame. These components facilitate the fixation of the entire device structure and maintain the stability of the pressure reducing valve.

[0012] Beneficial effects:

[0013] Compared to existing technologies, a high-pressure gas pressure reducing valve for closed-circuit diving respirators, through its cooperation with primary and secondary pressure reducing chambers, releases high-pressure gas in stages, avoiding the airflow instability and pressure fluctuations associated with single-stage pressure reduction. This effectively improves pressure reduction accuracy and breathing stability, making it particularly suitable for closed-circuit diving systems operating in deep water or for extended periods. By cooperating with a pressure-reducing diaphragm, elastic conduit, and first spring, it achieves rapid dynamic response to pressure changes, allowing for real-time adjustment of the sealing valve core. This effectively controls gas flow, preventing gas supply interruption or over-supply and improving breathing stability and comfort. Furthermore, by cooperating with an environmental pressure sensing chamber, first diaphragm, microfluidic channel, and throttling valve, it enhances the fine-tuning capability of gas flow, enabling precise control of gas supply. This is especially suitable for closed-circuit respirators where high gas ratio and flow rate requirements are critical. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is a top view of the high-pressure gas pressure reducing valve for a closed-loop diving respirator according to this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of the high-pressure gas pressure reducing valve for a closed-loop diving breathing apparatus according to this utility model.

[0017] Figure 3 This is a bottom view of the internal structure of the high-pressure gas pressure reducing valve for a closed-loop diving breathing apparatus according to this utility model.

[0018] Figure 4 This is a top view of the internal structure of the high-pressure gas pressure reducing valve for a closed-loop diving respirator according to this invention.

[0019] Legend:

[0020] 1. Frame; 2. High-pressure connector; 3. Air inlet channel; 4. Primary pressure reducing chamber; 5. Pressure reducing diaphragm; 6. Elastic conduit; 7. First spring; 8. Sealing valve core; 9. Secondary pressure reducing chamber; 10. Air outlet channel; 11. Output interface; 12. Exhalation outlet; 13. First bracket; 14. First frame; 15. Ambient pressure sensing chamber; 16. First diaphragm; 17. Throttling valve; 18. Microflow channel; 19. One-way drain outlet; 20. First mounting cover; 21. Heating pad; 22. Pressure gauge; 23. Slag removal port; 24. Second mounting cover; 25. Air filter; 26. Sealing ring; 27. Protective ring; 28. Needle valve; 29. ​​Sealing gasket. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] Reference Figures 1-4 This utility model discloses a high-pressure gas pressure reducing valve for a closed-circuit diving respirator, comprising: a frame 1, a high-pressure connector 2 fixedly connected to the lower surface of the frame 1, and a pressure gauge 22 fixedly connected to the top of the inner surface of the frame 1. An air inlet channel 3 is fixedly connected to the outer surface of the high-pressure connector 2, a primary pressure reducing chamber 4 is fixedly connected to the upper surface of the air inlet channel 3, a pressure reducing diaphragm 5 is fixedly connected to the outer surface of the primary pressure reducing chamber 4, an elastic conduit 6 is fixedly connected to the outer surface of the pressure reducing diaphragm 5, a first spring 7 is fixedly connected to the outer surface of the elastic conduit 6, a sealing valve core 8 is fixedly connected to the upper surface of the first spring 7, a secondary pressure reducing chamber 9 is fixedly connected to the outer surface of the sealing valve core 8, an air outlet channel 10 is fixedly connected to the outer surface of the secondary pressure reducing chamber 9, a protective ring 27 is fixedly connected to the outer surface of the air outlet channel 10, and a needle valve 28 is fixedly connected to the rear surface of the protective ring 27. An output interface 11 is fixedly connected to the rear surface of the air outlet channel 10, and an exhalation outlet 12 is provided on the outer surface of the output interface 11; an air filter 25 is fixedly connected to the inner surface of the exhalation outlet 12, and a sealing ring 26 is fixedly connected to the outer surface of the exhalation outlet 12.

[0023] Specifically, the air intake channel 3 is located inside or on the outer surface of the frame to guide the high-pressure gas upward and into the depressurization chamber. This primary depressurization chamber 4 is used to perform a first-stage depressurization of the input high-pressure gas, mitigating the instability caused by a sudden drop in pressure. A depressurization diaphragm 5 is fixedly connected to the outer surface of the primary depressurization chamber 4. This diaphragm 5 deforms when the air pressure changes, thereby driving subsequent structures to respond and regulate pressure. An elastic conduit 6 is fixedly connected to the outer surface of the depressurization diaphragm 5, and a first spring 7 is fixedly connected to the outer surface of the elastic conduit 6. This first spring 7 provides a rebound force, allowing the depressurization diaphragm 5 and the elastic conduit 6 to automatically return to their original positions when the air pressure decreases, forming a dynamic feedback closed loop. A sealing valve core 8 is fixedly connected to the upper surface of the first spring 7, and a secondary depressurization chamber 9 is fixedly connected to the outer surface of the sealing valve core 8. This chamber is used to perform a second-stage depressurization of the gas, further reducing the air pressure and outputting it to a pressure range suitable for human breathing. The output interface 11 is used to connect to the internal air circuit of the closed-circuit diving respirator to ensure a smooth supply of depressurized gas.

[0024] A first support 13 is fixedly connected to the outer surface of the secondary pressure reducing chamber 9. A first frame 14 is fixedly connected to the outer surface of the first support 13. A heating pad 21 is fixedly connected to the lower surface of the first frame 14, and the heating pad 21 is fixedly connected to the front surface of the first support 13. An environmental pressure sensing chamber 15 is fixedly connected to the outer surface of the first frame 14. A sealing gasket 29 is fixedly connected to the outer surface of the first frame 14, and the sealing gasket 29 is fixedly connected to the frame 1. A first diaphragm 16 is fixedly connected to the lower surface of the environmental pressure sensing chamber 15. A throttling valve 17 is fixedly connected to the outer surface of the first diaphragm 16, and a micro-flow channel 18 is fixedly connected to the outer surface of the throttling valve 17. A one-way drain port 19 is fixedly connected to the lower surface of the one-way drain port 19, and a first mounting cover 20 is rotatably connected to the lower surface of the one-way drain port 19. A slag removal port 23 is fixedly connected to the bottom surface of the frame 1, and a second mounting cover 24 is rotatably connected to the slag removal port 23.

[0025] Specifically, a first bracket 13 is fixedly connected to the outer surface of the secondary decompression chamber 9. This first bracket 13 provides a stable installation support platform for the subsequent environmental pressure sensing control module. A first frame 14 is fixedly connected to the outer surface of the first bracket 13, and an environmental pressure sensing chamber 15 is fixedly connected to the outer surface of the first frame 14. A throttle valve 17 is fixedly connected to the outer surface of a diaphragm 16. The environmental pressure sensing chamber 15 is a sealed structure used to sense changes in environmental pressure caused by diving depth in real time. Its internal air pressure changes can directly act on the diaphragm below, realizing an automatic adjustment function. The throttle valve 17 is opened, closed, or slightly adjusted under the action of diaphragm deformation, thereby dynamically adjusting the gas flow rate and further refining the control of the gas output intensity after decompression. The microflow channel 18 is connected to the outlet channel and is used to export the decompressed gas after environmental adjustment, so that the entire gas circuit system has both basic high-pressure decompression function and environmentally adaptive micro-adjustment capability.

[0026] A first hydraulic cylinder 16 is fixedly connected to the top of the inner surface of the first frame 6. A first telescopic rod 17 is fixedly connected to the lower surface of the first hydraulic cylinder 16. A first spring 18 is fixedly connected to the lower surface of the first telescopic rod 17. A pressing plate 19 is fixedly connected to the lower surface of the first spring 18. A damper 20 is fixedly connected inside the first spring 18. The lower surface of the damper 20 is fixedly connected to the first telescopic rod 17, and the upper surface of the damper 20 is fixedly connected to the pressing plate 19.

[0027] Specifically, a first hydraulic cylinder 16 is fixedly connected to the top of the inner surface of the first frame 6, and a first telescopic rod 17 is connected to the lower surface of the first hydraulic cylinder 16. A first spring 18 is fixedly connected to the lower end of the first telescopic rod 17, and a pressing plate 19 is fixedly connected to the lower end of the first spring 18 for applying adjustable pressure to the denture model. A damper 20 is provided inside the first spring 18. The lower end of the damper 20 is fixedly connected to the first telescopic rod 17, and the upper end is fixedly connected to the pressing plate 19, thereby providing a damping buffer effect during pressing to prevent excessive impact force and improve the stability and safety of the device operation.

[0028] Working principle: High-pressure gas enters the frame 1 through the high-pressure connector 2 and is introduced into the primary pressure reducing chamber 4 via the air inlet channel 3 for initial pressure reduction. The pressure reducing diaphragm 5 deforms under pressure, driving the first spring 7 to control the opening and closing of the sealing valve core 8, thus achieving pressure stabilization and regulation. The gas continues to enter the secondary pressure reducing chamber 9 for secondary pressure reduction, and then is stably output to the output interface 11 through the air outlet channel 10, finally supplying the user with air through the exhalation outlet 12. The secondary pressure reducing chamber 9 is equipped with a first support 13, a first frame 14, and an environmental pressure sensing chamber 15. Below the pressure sensing chamber 15 is a first diaphragm 16, which senses external pressure and pushes the throttle valve 17 to adjust the opening. The throttle valve 17 fine-tunes the gas flow rate through the microflow channel 18 to achieve environmentally adaptive gas supply. This device has a compact structure and features staged pressure reduction and environmental pressure sensing regulation functions.

[0029] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A high-pressure gas pressure reducing valve for a closed-circuit diving breathing apparatus, characterized in that, include: A frame (1) is fixedly connected to a high-pressure connector (2) on its lower surface. An air intake channel (3) is fixedly connected to the outer surface of the high-pressure connector (2). A primary pressure reducing chamber (4) is fixedly connected to the upper surface of the air intake channel (3). A pressure reducing diaphragm (5) is fixedly connected to the outer surface of the primary pressure reducing chamber (4). An elastic conduit (6) is fixedly connected to the outer surface of the pressure reducing diaphragm (5). A first spring (7) is fixedly connected to the outer surface of the elastic conduit (6). A sealing valve core (8) is fixedly connected to the upper surface of the first spring (7). A secondary pressure reducing chamber (9) is fixedly connected to the outer surface of the sealing valve core (8). An air outlet channel (10) is fixedly connected to the outer surface of the secondary pressure reducing chamber (9). An output interface (11) is fixedly connected to the rear surface of the air outlet channel (10). An exhalation outlet (12) is provided on the outer surface of the output interface (11). The outer surface of the secondary pressure reducing chamber (9) is supported by a first support (13), the outer surface of which is fixedly connected to a first frame (14), the outer surface of which is fixedly connected to an environmental pressure sensing chamber (15), the lower surface of which is fixedly connected to a first diaphragm (16), the outer surface of which is fixedly connected to a throttle valve (17), and the outer surface of which is fixedly connected to a microfluidic channel (18).

2. A high-pressure gas pressure reducing valve for a closed-circuit diving respirator according to claim 1, characterized in that, A single drain outlet (19) is fixedly connected to the lower surface of the frame (1), and a first mounting cover (20) is rotatably connected to the lower surface of the single drain outlet (19).

3. A high-pressure gas pressure reducing valve for a closed-circuit diving respirator according to claim 1, characterized in that, A heating pad (21) is fixedly connected to the lower surface of the first frame (14), and the heating pad (21) is fixedly connected to the front surface of the first bracket (13).

4. A high-pressure gas pressure reducing valve for a closed-circuit diving respirator according to claim 1, characterized in that, A pressure gauge (22) is fixedly connected to the top of the inner surface of the frame (1).

5. A high-pressure gas pressure reducing valve for a closed-circuit diving respirator according to claim 1, characterized in that, The bottom surface of the frame (1) is fixedly connected to a slag removal port (23), and the slag removal port (23) is rotatably connected to a second mounting cover (24).

6. A high-pressure gas pressure reducing valve for a closed-circuit diving respirator according to claim 1, characterized in that, An air filter (25) is fixedly connected to the inner surface of the exhalation outlet (12), and a sealing ring (26) is fixedly connected to the outer surface of the exhalation outlet (12).

7. A high-pressure gas pressure reducing valve for a closed-circuit diving respirator according to claim 1, characterized in that, A protective ring (27) is fixedly connected to the outer surface of the air outlet channel (10), and a needle valve (28) is fixedly connected to the rear surface of the protective ring (27).

8. A high-pressure gas pressure reducing valve for a closed-circuit diving respirator according to claim 1, characterized in that, The first frame (14) is fixedly connected to a sealing gasket (29), and the sealing gasket (29) is fixedly connected to the frame (1).

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