A device for pressure reduction by differential pressure

Abstract

This invention belongs to the field of medical oxygen decompression technology, and specifically relates to a device for decompression using differential pressure. It includes a fixed base, a filter nozzle installed within the fixed base, a threaded connecting sleeve installed within the fixed base, and an air bridge installed within the threaded connecting sleeve. This invention can achieve active decompression and overload warning to prevent systemic accidents caused by single component failures, even if internal decompression components, such as decompression springs, fail due to aging or accidental damage. It also reduces the risk of human error, such as operator errors due to inexperience, fatigue, or misjudgment, like adjusting overpressure. When the internal pressure of the valve body exceeds the safety threshold, the decompression function automatically releases the pressure, preventing valve body rupture due to pressure buildup. Simultaneously, a hissing sound indicates leakage, attracting attention. Therefore, it overcomes the limitations of manual monitoring and reduces reliance on the operator's expertise.

Description

Technical Field

[0001] This utility model relates to the field of medical oxygen decompression technology, specifically a device for decompression using pressure difference. Background Technology

[0002] In recent years, with the significant improvement of medical technology in my country, medical gas delivery devices have played an increasingly important role in clinical emergency care. Especially in the care of critically ill patients, medical oxygen delivery systems, as key equipment for maintaining vital signs, directly affect the patient's treatment outcome due to their safety and reliability.

[0003] The oxygen pressure reducing valve device commonly used in clinical practice currently functions by reducing the pressure of high-pressure oxygen from cylinders through a pressure regulating mechanism. Specifically, it works by connecting to the outlet of the oxygen cylinder, adjusting the initial pressure of 15 MPa of high-pressure oxygen to a safe output range of 0.2-0.6 MPa via a two-stage pressure reducing mechanism. It is worth noting that the device's dual-gauge monitoring system dynamically displays the output pressure value; an abnormally high low-pressure gauge indicates a potential safety hazard in the system.

[0004] However, existing technical solutions have certain drawbacks: traditional pressure reducing valves only have basic pressure reducing functions and lack pressure protection mechanisms. Specifically: 1. Insufficient operational safety: When unqualified personnel mistakenly connect the pressure reducing valve to a cylinder with a pressure exceeding its operating pressure, it may cause damage to internal components or abnormal outlet pressure; 2. System failure risk: If a diaphragm ruptures or the valve core becomes blocked inside the pressure reducing device, high-pressure oxygen may leak abnormally through gaps in the device, posing a risk of injury to personnel; 3. Lack of monitoring and protection: Existing devices cannot automatically cut off the gas path or release excess pressure when there is an abnormal pressure, relying solely on manual observation of the pressure gauge for intervention, resulting in a serious safety response lag. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a device for reducing pressure using differential pressure, thus solving the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0009] A device for reducing pressure using differential pressure includes a fixed base, a filter nozzle installed inside the fixed base, a threaded connecting sleeve installed inside the fixed base, an air bridge installed inside the threaded connecting sleeve, a large nut installed at the top of the air bridge, a connecting seat installed at the bottom of the fixed base, a throttle valve seat disposed inside the fixed base and at the top of the connecting seat, a pressure reducing spring fixedly installed at the top of the throttle valve seat, a spring seat fixedly installed at the top of the pressure reducing spring, the top of the spring seat fitting against the inner wall of the top of the fixed base, and a slidable fitting mounted on the middle of the throttle valve seat. A block is fixed in the middle of the throttle valve seat. Air passages are provided in the middle of the throttle valve seat and on both sides of the block. A through hole is provided at the bottom of the middle of the throttle valve seat. The air passages communicate with the through hole. The area between the filter, the spring seat, and the block is the upper chamber. The air passages communicate with the upper chamber. The area between the bottom of the throttle valve seat and the connecting seat is the lower chamber. The through hole communicates with the lower chamber. An air outlet is provided at one end of the connecting seat. A vent hole is provided on the side wall of the fixed seat. A gap is provided between the top of the connecting seat and the fixed seat. The vent hole communicates with the gap.

[0010] Furthermore, a first sealing ring is installed between the bottom end of the filter tip and the fixed base, and a sealing gasket is installed between the top end of the filter tip and the threaded connecting sleeve.

[0011] Furthermore, a second sealing ring is installed between the connecting seat and the fixed seat, a third sealing ring is installed between the throttle valve seat and the inner wall of the fixed seat, and a fourth sealing ring is installed between the top of the spring seat and the top inner wall of the fixed seat.

[0012] Furthermore, the inner wall of the top of the fixed base is provided with an internal thread, and the outer wall of the threaded connecting sleeve is provided with an external thread, and the threaded connecting sleeve is threadedly connected to the fixed base.

[0013] Furthermore, the inner wall of the threaded connecting sleeve is provided with an internal thread, and the outer wall of the bottom end of the air bridge is provided with an external thread, and the air bridge is threadedly connected to the threaded connecting sleeve.

[0014] Furthermore, the bottom outer wall of the fixed seat is provided with an external thread, and the top inner wall of the connecting seat is provided with an internal thread, and the connecting seat is threadedly connected to the fixed seat.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a device for reducing pressure using differential pressure, which has the following features:

[0017] Beneficial effects:

[0018] This invention, through the design of a throttling valve seat, a pressure-reducing spring, a spring seat, a plug, an air passage, a through hole, an upper chamber, a lower chamber, an air outlet, and a vent hole, enables active pressure relief and overload warning. This prevents systemic accidents caused by single-component failures, even if internal pressure-reducing components, such as the pressure-reducing spring, fail due to aging or accidental damage. It also reduces the risk of human error, such as operator errors due to inexperience, fatigue, or misjudgment, like adjusting for overpressure. When the internal pressure of the valve body exceeds the safety threshold, the pressure relief function automatically releases the pressure, preventing valve body rupture due to pressure buildup. Simultaneously, a hissing sound indicates leakage, drawing attention. This overload warning function compensates for the limitations of human monitoring and reduces reliance on the operator's expertise. Attached Figure Description

[0019] Figure 1 This is a front view schematic diagram of a device for reducing pressure using pressure difference according to this utility model;

[0020] Figure 2 This utility model Figure 1 Schematic diagram of the cross-sectional structure at point AA along the middle edge;

[0021] Figure 3 This is a three-dimensional structural diagram of the throttle valve seat and spring seat of this utility model;

[0022] Figure 4 This is a schematic diagram of the device for reducing pressure using differential pressure after it is installed on the valve body.

[0023] In the diagram: 1. Fixed seat; 2. Filter nozzle; 3. Threaded connecting sleeve; 4. Air bridge; 5. Large nut; 6. Connecting seat; 7. Throttling valve seat; 8. Pressure reducing spring; 9. Spring seat; 10. Plug; 11. Air passage; 12. Through hole; 13. Upper chamber; 14. Lower chamber; 15. Air outlet; 16. Vent hole; 17. Gap; 18. First sealing ring; 19. Sealing gasket; 20. Second sealing ring; 21. Third sealing ring; 22. Fourth sealing ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example

[0026] like Figure 1-4As shown, an embodiment of this utility model discloses a device for reducing pressure using differential pressure, including a fixed base 1, a filter nozzle 2 installed inside the fixed base 1, a threaded connecting sleeve 3 installed inside the fixed base 1, an air bridge 4 installed inside the threaded connecting sleeve 3, a large nut 5 installed at the top of the air bridge 4, a connecting seat 6 installed at the bottom of the fixed base 1, a throttle valve seat 7 disposed inside the fixed base 1 and located at the top of the connecting seat 6, four pressure reducing springs 8 fixedly mounted in a circumferential array on the top of the throttle valve seat 7, spring seats 9 fixedly mounted at the top of the four pressure reducing springs 8, the top of the spring seats 9 fitting against the inner wall of the top of the fixed base 1, and the middle of the spring seats 9 being slidably mounted on the middle of the throttle valve seat 7. A block 10 is fixed in the middle of the throttle valve seat 7. An air passage 11 is provided in the middle of the throttle valve seat 7 and on both sides of the block 10. A through hole 12 is provided at the bottom of the middle of the throttle valve seat 7. The air passage 11 communicates with the through hole 12. The area between the filter 2, the spring seat 9 and the block 10 is the upper chamber 13. The air passage 11 communicates with the upper chamber 13. The area between the bottom of the throttle valve seat 7 and the connecting seat 6 is the lower chamber 14. The through hole 12 communicates with the lower chamber 14. An air outlet 15 is provided at one end of the connecting seat 6. A vent hole 16 is provided on the side wall of the fixed seat 1. A gap 17 is provided between the top of the connecting seat 6 and the fixed seat 1. The vent hole 16 communicates with the gap 17.

[0027] like Figure 2 and Figure 3 As shown, in this embodiment, a first sealing ring 18 is installed between the bottom end of the filter nozzle 2 and the fixed seat 1 to improve the sealing performance at the connection between the bottom end of the filter nozzle 2 and the fixed seat 1; a sealing gasket 19 is installed between the top end of the filter nozzle 2 and the threaded connecting sleeve 3 to improve the sealing performance at the connection between the top end of the filter nozzle 2 and the threaded connecting sleeve 3; a second sealing ring 20 is installed between the connecting seat 6 and the fixed seat 1 to improve the sealing performance at the connection between the connecting seat 6 and the fixed seat 1; a third sealing ring 21 is installed between the throttle valve seat 7 and the inner wall of the fixed seat 1 to improve the sealing performance at the connection between the throttle valve seat 7 and the inner wall of the fixed seat 1; and a fourth sealing ring 22 is installed between the top of the spring seat 9 and the top inner wall of the fixed seat 1 to improve the sealing performance at the connection between the top of the spring seat 9 and the top inner wall of the fixed seat 1 under normal conditions.

[0028] like Figure 2As shown, in this embodiment, the inner wall of the top end of the fixed base 1 is provided with an internal thread, and the outer wall of the threaded connecting sleeve 3 is provided with an external thread. The threaded connecting sleeve 3 is threadedly connected to the fixed base 1 to facilitate the assembly and disassembly of the threaded connecting sleeve 3 and the fixed base 1. The inner wall of the threaded connecting sleeve 3 is provided with an internal thread, and the outer wall of the bottom end of the air bridge 4 is provided with an external thread. The air bridge 4 is threadedly connected to the threaded connecting sleeve 3 to facilitate the assembly and disassembly of the air bridge 4 and the threaded connecting sleeve 3. The outer wall of the bottom end of the fixed base 1 is provided with an external thread, and the inner wall of the top end of the connecting base 6 is provided with an internal thread. The connecting base 6 is threadedly connected to the fixed base 1 to facilitate the assembly and disassembly of the connecting base 6 and the fixed base 1.

[0029] The working principle and usage process of this utility model are as follows: In use, the large nut 5 connects the air bridge 4 to the high-pressure oxygen on the oxygen cylinder. The high-pressure oxygen enters the air bridge 4 and then passes through the filter 2 into the upper chamber 13. The oxygen in the upper chamber 13 enters the lower chamber 14 through the two air passages 11 and the through hole 12 in the middle of the throttle valve seat 7. The pressure in the lower chamber 14 increases, thus overcoming the elastic force of the pressure-reducing spring 8 and lifting the throttle valve seat 7 and the plug 10. At this time, the oxygen in the lower chamber 14 enters the outlet 15 and then the subsequent part of the valve body. This achieves oxygen pressure reduction. When the pressure in the lower chamber 14 reaches a certain value, the plug 10 in the middle of the throttle valve seat 7 blocks the small hole at the bottom of the filter 2, preventing further oxygen entry. After oxygen is lost from chamber 14, the pressure in the lower chamber 14 drops, which is insufficient to overcome the elastic force of the pressure-reducing spring 8. As a result, under the action of the elastic force of the pressure-reducing spring 8, the throttle valve seat 7 and the plug 10 will move downward. The plug 10 cannot block the small hole at the bottom of the filter 2, and oxygen will continue to enter the upper chamber 13. When the pressure in the lower chamber 14 reaches a certain value again, the plug 10 will block the small hole at the bottom of the filter 2 again to prevent oxygen from entering. This process is repeated to ensure the stability of the oxygen output pressure. Finally, the depressurized oxygen enters the subsequent part of the valve body through the outlet 15. It should be further explained that this device is used in conjunction with an oxygen valve. This device is part of the existing patent application number: 202411925422X, patent name: a differential pressure pulse oxygen valve.

[0030] When the pressure-reducing spring 8 or the plug 10 is damaged, the pressure in the upper chamber 13 and the lower chamber 14 continues to increase. Even when the plug 10 moves upward to its limit position, it cannot block the small hole at the bottom of the filter nozzle 2. At this time, the pressure in the upper chamber 13 is still rising. When a certain pressure is reached, the spring seat 9 will move downward. At this time, the top of the spring seat 9 cannot form a sealing surface with the inner wall of the top of the fixed seat 1. The high-pressure oxygen in the upper chamber 13 will enter the vent hole 16 from the space between the spring seat 9 and the inner wall of the top of the fixed seat 1, and be discharged into the external environment through the gap 17. Because the gap 17 is small and narrow, it will produce a hissing sound of leakage, which can attract people's attention.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for reducing pressure using differential pressure, comprising a fixed base (1), characterized in that: A filter nozzle (2) is installed inside the fixed seat (1). A threaded connecting sleeve (3) is installed inside the fixed seat (1). An air bridge (4) is installed inside the threaded connecting sleeve (3). A large nut (5) is installed at the top of the air bridge (4). A connecting seat (6) is installed at the bottom of the fixed seat (1). A throttle valve seat (7) is provided inside the fixed seat (1) and at the top of the connecting seat (6). A pressure-reducing spring (8) is fixedly installed at the top of the throttle valve seat (7). A spring seat (9) is fixedly installed at the top of the pressure-reducing spring (8). The top of the spring seat (9) is fitted against the inner wall of the top of the fixed seat (1). The middle part of the spring seat (9) is slidably mounted on the middle part of the throttle valve seat (7). A block (10) is fixedly installed in the middle part of the throttle valve seat (7). Air passages (11) are provided in the middle and on both sides of the block (10). A through hole (12) is provided at the bottom of the middle part of the throttle valve seat (7). The air passages (11) are connected to the through hole (12). The area between the filter (2), the spring seat (9), and the block (10) is the upper chamber (13). The air passages (11) are connected to the upper chamber (13). The area between the bottom of the throttle valve seat (7) and the connecting seat (6) is the lower chamber (14). The through hole (12) is connected to the lower chamber (14). An air outlet (15) is provided at one end of the connecting seat (6). A vent hole (16) is provided on the side wall of the fixed seat (1). A gap (17) is provided between the top of the connecting seat (6) and the fixed seat (1). The vent hole (16) is connected to the gap (17).

2. The device for reducing pressure using differential pressure according to claim 1, characterized in that: A first sealing ring (18) is installed between the bottom end of the filter (2) and the fixed base (1), and a sealing gasket (19) is installed between the top end of the filter (2) and the threaded connecting sleeve (3).

3. The device for reducing pressure using differential pressure according to claim 1, characterized in that: A second sealing ring (20) is installed between the connecting seat (6) and the fixed seat (1), a third sealing ring (21) is installed between the throttle valve seat (7) and the inner wall of the fixed seat (1), and a fourth sealing ring (22) is installed between the top of the spring seat (9) and the top inner wall of the fixed seat (1).

4. The device for reducing pressure using differential pressure according to claim 1, characterized in that: The top inner wall of the fixed base (1) is provided with an internal thread, and the outer wall of the threaded connecting sleeve (3) is provided with an external thread. The threaded connecting sleeve (3) is threadedly connected to the fixed base (1).

5. The device for reducing pressure using differential pressure according to claim 1, characterized in that: The inner wall of the threaded connecting sleeve (3) is provided with an internal thread, and the outer wall of the bottom end of the air bridge (4) is provided with an external thread. The air bridge (4) is threadedly connected to the threaded connecting sleeve (3).

6. The device for reducing pressure using differential pressure according to claim 1, characterized in that: The bottom outer wall of the fixed seat (1) is provided with an external thread, and the top inner wall of the connecting seat (6) is provided with an internal thread. The connecting seat (6) is threadedly connected to the fixed seat (1).

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