On-demand gas supply device

Abstract

The utility model discloses an on-demand air supply device which is used for the on-demand air supply function of a hyperbaric oxygen chamber air control breathing machine and a saturated oxygen inhaler and comprises a valve body, the valve body comprises a first lower valve body, a second lower valve body, a third lower valve body, a middle valve body and an upper valve body, the first lower valve body is fixedly installed at the bottom of the second lower valve body, and the third lower valve body is fixedly installed at the bottom of the middle valve body. A lower air chamber is defined by the interior of the first lower valve body and the interior of the second lower valve body, a lower diaphragm is arranged in the lower air chamber, the third lower valve body is fixedly installed on the top of the second lower valve body, an oxygen control chamber is defined by the interior of the third lower valve body and the top of the second lower valve body, and a middle valve body is fixedly installed on the top of the third lower valve body. An upper valve body is fixedly mounted at the top of the middle valve body, a middle air chamber is defined between the bottom of the middle valve body and the top of the third lower valve body, and an upper air chamber is defined between the interior of the upper valve body and the top of the middle valve body; the valve body is not provided with a throttling valve any more, and the input pressure of the control port G and the oxygen flow of the oxygen output pipe F can be adjusted at the same time by adjusting the negative pressure at the negative pressure port A.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen supply on demand, in particular to a device for supplying gas on demand. Background Art

[0002] The Chinese patent with the announcement number CN2642338Y discloses an oxygen supply valve on demand for an air-controlled ventilator, comprising a valve body, an upper air chamber, a middle air chamber, and a lower air chamber are sequentially arranged in the valve cavity; an oxygen inlet pipe connected to an oxygen source and an oxygen outlet pipe for supplying oxygen are connected to the lower air chamber, a lower sealing port is arranged at the connection between the oxygen inlet pipe and the lower air chamber, a reversing block with a lower sealing gasket is arranged on the lower sealing port, and the reversing block is connected to a push rod; a pressure diaphragm is arranged in the middle air chamber, the pressure diaphragm is connected to the above-mentioned push rod, and the upper part of the pressure diaphragm in the middle air chamber is communicated with a control signal pipeline , the lower part is connected to an exhaust port; a pressure diaphragm is also provided in the upper air chamber, an upper sealing gasket is fixed under the pressure diaphragm, the upper sealing gasket is placed on the upper sealing port of the control signal pipeline, a pressure spring is fixed on the upper part of the pressure diaphragm, the upper end of the pressure spring is fixed by a moving block, an adjusting rod is connected to the moving block, the upper part of the pressure diaphragm of the upper air chamber is communicated with the negative pressure inlet pipeline, and the lower part is connected to an exhaust port; a control signal inlet is arranged at the lower part of the valve body, which is communicated with the throttle valve in the valve body, the throttle valve outlet is connected to the control signal pipeline, and the throttle valve stem is placed at the bottom of the valve body.

[0003] When the above-mentioned on-demand oxygen supply valve is in use, a built-in throttle valve is required to adjust the input pressure of the control signal port, which causes inconvenience in adjustment. In addition, the pressure diaphragm in the upper air chamber is flat, and the pressure action surface of the diaphragm is small, resulting in low trigger pressure adjustment accuracy.

[0004] For this purpose, we propose a device for supplying gas on demand. Utility Model Content

[0005] The purpose of the utility model is to provide a device for supplying gas on demand, so as to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0007] A device for supplying gas on demand, comprising a valve body, wherein the valve body comprises a first lower valve body, a second lower valve body, a third lower valve body, a middle valve body and an upper valve body, wherein the first lower valve body is fixedly mounted on the bottom of the second lower valve body, the interior of the first lower valve body and the interior of the second lower valve body form a lower air chamber, a lower diaphragm is arranged in the lower air chamber, the third lower valve body is fixedly mounted on the top of the second lower valve body, the interior of the third lower valve body and the top of the second lower valve body form an oxygen control chamber, and the third lower valve body is provided with an oxygen input pipe E and an oxygen inlet pipe connected to the oxygen control chamber. Output pipe F, a middle valve body is fixedly installed on the top of the third lower valve body, an upper valve body is fixedly installed on the top of the middle valve body, a middle air chamber is formed between the bottom of the middle valve body and the top of the third lower valve body, an input port DⅠ and an input port DⅡ connected to the middle air chamber are provided on the third lower valve body, the input port DⅠ and the input port DⅡ are connected, the middle valve body is provided with an exhaust port C connected to the upper end of the middle air chamber, an upper air chamber is formed between the interior of the upper valve body and the top of the middle valve body, an upper diaphragm is provided in the upper air chamber, and an exhaust port C connected to the upper end of the middle air chamber is provided on the upper valve body. The negative pressure port A connected to the upper air chamber is located above the upper diaphragm. A control port G connected to the lower air chamber is provided on one side of the first lower valve body, and the control port G is located below the lower diaphragm. An isolation plate is slidably provided in the middle air chamber, and the isolation plate is located between the input port DⅠ and the exhaust port C. An upper shaft is fixedly connected to the top of the isolation plate. A center body is fixedly installed inside the middle valve body. The upper end of the upper shaft seals and slides through the center body and then abuts against the bottom of the upper diaphragm. An axis seat is fixedly installed on the top of the upper valve body. A connecting seat is installed on the shaft seat, and a stopper is fixedly connected to the upper end of the connecting seat. A spring is sleeved on the connecting seat, and the upper end of the spring is against the bottom of the stopper, and the lower end of the spring is pressed on the top of the upper diaphragm. A lower shaft is fixedly connected to the top of the lower diaphragm, and the upper end of the lower shaft seals and slides through the top of the second lower valve body and then extends into the oxygen control chamber. A sealing shaft that can block the oxygen output pipe F is provided in the oxygen control chamber, and the sealing shaft is fixedly connected to the upper end of the lower shaft, and the input port DⅡ is connected to the control port G through a pipeline.

[0008] In a device for supplying air on demand according to the utility model, the middle valve body is provided with an air inlet B which is in communication with the upper air chamber.

[0009] In a device for supplying air on demand according to the utility model, the second lower valve body is provided with an exhaust port H communicating with the lower air chamber, and the exhaust port H is located above the lower diaphragm.

[0010] In an on-demand air supply device according to the utility model, a sealing silicone pad is fixedly embedded on the top of the sealing shaft.

[0011] In a device for supplying air on demand according to the utility model, O-rings are provided between the third lower valve body and the middle valve body, and between the third lower valve body and the second lower valve body.

[0012] In a device for supplying air on demand according to the utility model, a retaining spring is provided after the upper end of the connecting seat seals and passes through the top of the shaft seat.

[0013] In a device for supplying air on demand according to the utility model, the upper diaphragm is arranged in a bowl shape.

[0014] The utility model has at least the following beneficial effects:

[0015] When the utility model is in use, the input port DⅡ is connected with the control port G through the pipeline, and the oxygen input pipe E inputs oxygen into the oxygen control chamber. When the input port DⅠ is pressurized and there is no negative pressure at the negative pressure port A, the upper diaphragm is pressed by the upper spring. Since the upper diaphragm is connected to the upper shaft rod, when the upper diaphragm is subjected to downward pressure from the spring, the upper shaft rod is forced to press the lower isolation plate, and the gas inputted from the input port DⅠ cannot be discharged from the exhaust port C, thereby making the gas inputted from the input port DⅠ pass through the input port DⅡ through the pipeline and enter the control port G. When the control port G has gas input, the gas slowly lifts the lower diaphragm and drives the lower diaphragm to move upward. The excess gas in the lower air chamber above the lower diaphragm is discharged from the exhaust port H, so that the pressure above the lower diaphragm is less than the pressure below the lower diaphragm. Since the lower diaphragm is connected to the lower shaft rod, the lower shaft rod moves upward when the lower diaphragm moves upward. When the input air pressure reaches a certain value, the lower diaphragm lifts the lower shaft rod, and the lower shaft rod lifts the sealing shaft to block the outlet of the oxygen output pipe F, so that there is no oxygen output from the oxygen output pipe F;

[0016] When there is a certain negative pressure at the negative pressure port A, the upper diaphragm is slightly lifted. When the upper diaphragm is lifted, a small amount of gas enters the upper air chamber below the upper diaphragm from the air inlet B, and the upper diaphragm releases the pressure on the upper shaft. The gas input from the input port DⅠ will lift the isolation plate, and the gas input from the input port DⅠ will be discharged from the exhaust port C, so that the pressure at the control port G becomes smaller, and then the sealing shaft cannot block the outlet of the oxygen output pipe F, so that the oxygen output pipe F can output oxygen; the valve body is no longer provided with a throttle valve, and the input pressure of the control port G and the oxygen flow rate of the oxygen output pipe F can be adjusted at the same time by adjusting the negative pressure at the negative pressure port A;

[0017] By changing the upper diaphragm into a bowl-shaped setting and increasing the pressure action area of ​​the upper diaphragm, the trigger pressure can be reduced more precisely, making the trigger pressure adjustment more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of another viewing angle of the utility model;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model.

[0022] Description of Figure Numbers:

[0023] 1. First lower valve body; 2. Second lower valve body; 3. Third lower valve body; 4. Middle valve body; 401. Center body; 5. Upper valve body; 501. Shaft seat; 6. Control port G; 7. Oxygen input pipe E; 8. Oxygen output pipe F; 9. Exhaust port C; 10. Air inlet B; 11. Negative pressure port A; 12. Input port DⅠ; 1201. Input port DⅡ; 13. Isolation plate; 14. Upper shaft rod; 15. Upper diaphragm; 16. Spring; 17. Connecting seat; 1701. Stopper; 18. Retaining spring; 19. Lower diaphragm; 20. Lower shaft rod; 21. Sealing shaft; 22. Sealing silicone pad; 23. Sealing ring; 24. Exhaust port H. DETAILED DESCRIPTION

[0024] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0025] Please refer to Figures 1 to 3As shown, an embodiment of the utility model provides a device for supplying gas on demand, including a valve body, the valve body including a first lower valve body 1, a second lower valve body 2, a third lower valve body 3, a middle valve body 4 and an upper valve body 5, the first lower valve body 1 is fixedly mounted on the bottom of the second lower valve body 2, the interior of the first lower valve body 1 and the interior of the second lower valve body 2 form a lower air chamber, a lower diaphragm 19 is arranged in the lower air chamber, the third lower valve body 3 is fixedly mounted on the top of the second lower valve body 2, the interior of the third lower valve body 3 and the top of the second lower valve body 2 form an oxygen control chamber, the third lower valve body 3 is provided with an oxygen input pipe E7 and an oxygen output pipe F8 connected to the oxygen control chamber, the top of the third lower valve body 3 is fixedly mounted with the middle valve body 4, the top of the middle valve body 4 is fixedly mounted with The upper valve body 5, the bottom of the middle valve body 4 and the top of the third lower valve body 3 form a middle air chamber, the third lower valve body 3 is provided with an input port DⅠ12 and an input port DⅡ1201 connected to the middle air chamber, the input port DⅠ12 and the input port DⅡ1201 are connected, the middle valve body 4 is provided with an exhaust port C9 connected to the upper end of the middle air chamber, the interior of the upper valve body 5 and the top of the middle valve body 4 form an upper air chamber, an upper diaphragm 15 is provided in the upper air chamber, the upper valve body 5 is provided with a negative pressure port A11 connected to the upper air chamber, the negative pressure port A11 is located above the upper diaphragm 15, a control port G6 connected to the lower air chamber is provided on one side of the first lower valve body 1, the control port G6 is located below the lower diaphragm 19, and an isolation plate 1 is slidably provided in the middle air chamber. 3. The isolation plate 13 is located between the input port DⅠ12 and the exhaust port C9. The top of the isolation plate 13 is fixedly connected with an upper shaft rod 14. The center body 401 is fixedly installed inside the middle valve body 4. The upper end of the upper shaft rod 14 seals and slides through the center body 401 and then abuts against the bottom of the upper diaphragm 15. The top of the upper valve body 5 is fixedly installed with a shaft seat 501. A connecting seat 17 is installed on the shaft seat 501. The upper end of the connecting seat 17 is fixedly connected with a stopper 1701. A spring 16 is sleeved on the connecting seat 17. The upper end of the spring 16 abuts against the bottom of the stopper 1701. The lower end of the spring 16 presses on the top of the upper diaphragm 15. The top of the lower diaphragm 19 is fixedly connected with a lower shaft rod 20. The upper end of the lower shaft rod 20 seals and slides through the second lower valve body 2. The top extends into the oxygen control room. A sealing shaft 21 capable of blocking the oxygen output pipe F8 is provided in the oxygen control room. The sealing shaft 21 is fixedly connected to the upper end of the lower shaft rod 20. The input port DⅡ1201 is connected with the control port G6 through a pipeline. The middle valve body 4 is provided with an air inlet B10 connected with the upper air chamber. The function of the air inlet B10 is to take in and exhaust air when the diaphragm 15 moves up and down with breathing, and also to play a damping role. The second lower valve body 2 is provided with an exhaust port H24 connected with the lower air chamber. The exhaust port H24 is located above the lower diaphragm 19. The function of the exhaust port H24 is to take in and exhaust air when the lower diaphragm 19 moves up and down with breathing, and also to play a damping role.

[0026] Specifically, in order to improve the sealing performance of the entire valve body, an O-ring 23 is provided between the third lower valve body 3 and the middle valve body 4 , and between the third lower valve body 3 and the second lower valve body 2 .

[0027] Specifically, a sealing silicone pad 22 is fixedly embedded on the top of the sealing shaft 21. The sealing silicone pad 22 not only acts as a switch, but also plays a role in regulating the flow. As the pressure of the lower diaphragm 19 changes, the pressure of the respiratory airway -1KPa-6KPa is amplified to 20-500 times the flow control.

[0028] Specifically, in this embodiment, the upper end of the connecting seat 17 is sealed and passes through the top of the shaft seat 501, and a retaining spring 18 is provided thereon. The correction of the airway pressure to the flow parameters can be adjusted by the provided retaining spring 18.

[0029] Specifically, the upper diaphragm 15 is arranged in a bowl shape. By changing the upper diaphragm 15 into a bowl shape and increasing the diaphragm area, the diaphragm becomes soft, so that the trigger pressure adjustment accuracy is improved, the trigger pressure is reduced, and the comfort is improved.

[0030] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0031] Working principle: When in use, the input port DⅡ1201 is connected to the control port G6 through a pipeline, and the oxygen input pipe E7 inputs oxygen into the oxygen control chamber. When the input port DⅠ12 is pressurized and there is no negative pressure at the negative pressure port A11, the upper diaphragm 15 is pressed by the upper spring 16. Since the upper diaphragm 15 is connected to the upper shaft 14, when the upper diaphragm 15 is pressed downward by the spring 16, the upper shaft 14 is forced to press the lower isolation plate 13, and the gas input from the input port DⅠ12 cannot be discharged from the exhaust port C9. Exhaust, so that the gas input from the input port DⅠ12 enters the control port G6 through the input port DⅡ1201 through the pipeline. When the control port G6 has gas input, the gas slowly lifts the lower diaphragm 19 and drives the lower diaphragm 19 to move upward. The excess gas in the lower air chamber above the lower diaphragm 19 is discharged from the exhaust port H24, making the pressure above the lower diaphragm 19 less than the pressure below the lower diaphragm 19. Since the lower diaphragm 19 is connected to the lower shaft 20, the lower diaphragm 19 moves upward and the lower shaft 20 moves upward. When the input gas pressure reaches a certain value, the lower diaphragm 19 lifts the lower shaft 20, and the lower shaft 20 lifts the sealing shaft 21, blocking the outlet of the oxygen output pipe F8, so that there is no oxygen output from the oxygen output pipe F8;

[0032] When there is a certain negative pressure at the negative pressure port A11, the upper diaphragm 15 is slightly lifted. When the upper diaphragm 15 is lifted, a small amount of gas enters the upper air chamber below the upper diaphragm 15 from the air inlet B10, and the upper diaphragm 15 releases the pressure on the upper shaft 14. The gas input from the input port DⅠ12 will lift the isolation plate 13, and the gas input from the input port DⅠ12 is discharged from the exhaust port C9, so that the pressure at the control port G6 becomes smaller, and then the sealing shaft 21 cannot block the outlet of the oxygen output pipe F8, so that the oxygen output pipe F8 can output oxygen; the valve body is no longer provided with a throttle valve, and the input pressure of the control port G6 and the oxygen flow rate of the oxygen output pipe F8 can be adjusted simultaneously by adjusting the negative pressure at the negative pressure port A11.

[0033] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A device for supplying gas on demand, characterized in that: The valve body comprises a first lower valve body (1), a second lower valve body (2), a third lower valve body (3), a middle valve body (4) and an upper valve body (5); the first lower valve body (1) is fixedly mounted on the bottom of the second lower valve body (2); the interior of the first lower valve body (1) and the interior of the second lower valve body (2) form a lower air chamber; a lower diaphragm (19) is arranged in the lower air chamber; the third lower valve body (3) is fixedly mounted on the top of the second lower valve body (2); the interior of the third lower valve body (3) and the top of the second lower valve body (2) form an oxygen control chamber; the third lower valve body (3) is provided with an oxygen input pipe E (7) and an oxygen output pipe F (8) which are connected to the oxygen control chamber; A middle valve body (4) is fixedly mounted on the top of the lower valve body (3), an upper valve body (5) is fixedly mounted on the top of the middle valve body (4), a middle air chamber is formed between the bottom of the middle valve body (4) and the top of the third lower valve body (3), an input port DⅠ (12) and an input port DⅡ (1201) which are connected to the middle air chamber are provided on the third lower valve body (3), the input port DⅠ (12) and the input port DⅡ (1201) are connected, the middle valve body (4) is provided with an exhaust port C (9) which is connected to the upper end of the middle air chamber, an upper air chamber is formed between the interior of the upper valve body (5) and the top of the middle valve body (4), an upper diaphragm (15) is provided in the upper air chamber, and a gas outlet (C) which is connected to the gas outlet (C) is provided on the upper valve body (5). A negative pressure port A (11) connected to the upper air chamber, the negative pressure port A (11) is located above the upper diaphragm (15), a control port G (6) connected to the lower air chamber is provided on one side of the first lower valve body (1), the control port G (6) is located below the lower diaphragm (19), an isolation plate (13) is slidably provided in the middle air chamber, the isolation plate (13) is located between the input port DⅠ (12) and the exhaust port C (9), an upper shaft rod (14) is fixedly connected to the top of the isolation plate (13), a center body (401) is fixedly installed inside the middle valve body (4), the upper end of the upper shaft rod (14) seals and slides through the center body (401) and then abuts against the bottom of the upper diaphragm (15), The top of the upper valve body (5) is fixedly mounted with an axle seat (501), the axle seat (501) is mounted with a connecting seat (17), the upper end of the connecting seat (17) is fixedly connected with a stopper (1701), a spring (16) is sleeved on the connecting seat (17), the upper end of the spring (16) abuts against the bottom of the stopper (1701), the lower end of the spring (16) presses against the top of the upper diaphragm (15), the top of the lower diaphragm (19) is fixedly connected with a lower shaft rod (20), the upper end of the lower shaft rod (20) seals and slides through the top of the second lower valve body (2) and then extends into the oxygen control chamber, the oxygen control chamber is provided with a sealing shaft (21) capable of blocking the oxygen output pipe F (8),The sealing shaft (21) is fixedly connected to the upper end of the lower shaft (20), and the input port DII (1201) is connected to the control port G (6) through a pipeline.

2. The on-demand gas supply device according to claim 1, characterized in that: The middle valve body (4) is provided with an air inlet B (10) which is in communication with the upper air chamber.

3. The on-demand gas supply device according to claim 2, characterized in that: The second lower valve body (2) is provided with an exhaust port H (24) which is in communication with the lower air chamber, and the exhaust port H (24) is located above the lower diaphragm (19).

4. The on-demand gas supply device according to claim 3, characterized in that: A sealing silicone pad (22) is fixedly embedded on the top of the sealing shaft (21).

5. The on-demand gas supply device according to claim 1, characterized in that: An O-ring (23) is provided between the third lower valve body (3) and the middle valve body (4), and between the third lower valve body (3) and the second lower valve body (2).

6. The on-demand gas supply device according to claim 1, characterized in that: The upper end of the connecting seat (17) is sealed and passes through the top of the shaft seat (501), and is then clamped with a retaining spring (18).

7. The on-demand gas supply device according to claim 1, characterized in that: The upper diaphragm (15) is arranged in a bowl shape.

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