Oxygen-saving valve

Abstract

The utility model discloses an oxygen saving valve. The device is composed of a connecting assembly, a decompression assembly and a breathing assembly. By means of the breathing assembly, air outlet is stopped during expiration, air outlet is recovered during inspiration, and therefore the purpose of saving oxygen is achieved. Compared with an existing pulse valve, the pulse valve is of a pure mechanical structure, does not need to be powered on, and is more convenient and safer.

Description

Technical Field

[0001] The present invention relates to the field of oxygen supply valves, and in particular to an oxygen-saving valve. Background Art

[0002] Oxygen is an essential substance for the human body to maintain life. All kinds of movements of the human body, whether it is the physiological and biochemical processes that maintain the life activities of cells or the cell tissue division and proliferation processes, consume energy, and this energy is obtained by oxidizing various energy-providing substances in the cells by oxygen. As the amount of exercise of the human body increases, the amount of exercise of various tissues and cells in the human body also increases accordingly. At the same time, human cells need more oxygen to obtain more energy to maintain the movement balance of cell tissues. The human body obtains oxygen through the respiratory organs, but in most cases, the oxygen obtained by the human body through the respiratory organs cannot meet the needs of the human body during strenuous exercise. At this time, the human body will show symptoms such as an accelerated breathing rate, an increased breathing volume, and then difficulty breathing. This is the manifestation of hypoxia in various tissues of the human body. If this phenomenon lasts for a long time, irreversible damage will occur to the cells in the human body, and ultimately lead to the death of cells or individual tissues (especially brain cells). Medicine calls it hypoxic injury.

[0003] When using an oxygen cylinder for oxygen supply, generally, the oxygen supply is reduced by a first-stage decompression method. In the actual use process of such an oxygen supply valve, the oxygen supply pressure fluctuates greatly and is unstable. It is mainly manifested that when the pressure of the gas cylinder is large, the oxygen outlet pressure is large, and when the pressure in the gas cylinder decreases with use, the oxygen outlet pressure of the oxygen supply valve also decreases, and the use effect is not good. Moreover, the oxygen supply end of the existing oxygen supply valve generally only has an opening and closing function. When it is opened, oxygen supply is carried out, and when it is closed, oxygen supply stops. It does not have a pulse oxygen supply function. That is to say, when oxygen is supplied, oxygen will continuously output through the oxygen supply end, and it does not have the function of supplying oxygen when the user breathes and stopping oxygen supply when the user exhales.

[0004] In order to realize the association between oxygen supply and breathing, that is, supplying oxygen when inhaling and stopping oxygen supply when exhaling, generally, an electronic valve device with a pulse function is externally connected to the oxygen supply end at present, and pulse oxygen supply is realized through the externally connected electronic valve device. However, such a method has the following disadvantages. First, the electronic valve device needs to be externally charged, which is inconvenient to use. Second, it is not easy to carry when going out. Therefore, how to solve the above technical problems has become the research direction of those skilled in the art. Summary of the Invention

[0005] The problem to be solved by the present invention is to propose an innovative solution for the above-mentioned shortcomings in the prior art, especially an oxygen supply valve relying on a pure mechanical structure, which realizes stopping gas supply when exhaling and resuming gas supply when inhaling.

[0006] To solve the above problems, the solution adopted by the present invention is as follows: An oxygen-saving valve, characterized in that the oxygen-saving valve is composed of a connection assembly, a pressure-reducing assembly, and a breathing assembly.

[0007] The connection assembly includes a locking screw rod, a tooth sleeve, a valve body, a positioning pin, and a pressure gauge;

[0008] The pressure-reducing assembly includes an air inlet joint, a stop valve core, a pressure-reducing seat, a valve post, a pressure-reducing spring, an inner seal ring of the valve post, and an outer seal ring of the valve post.

[0009] The breathing assembly includes a base, a base gland, a gland seal ring, a base spring, a base spring cap, a pure rubber diaphragm, a base seal ring, a flow control knob, a composite diaphragm, a diaphragm spring, a diaphragm adjusting screw, an upper cover, and an air outlet nozzle;

[0010] The locking screw rod is connected to the valve body through the tooth sleeve; the positioning pin is arranged in the valve body for positioning the gas outlet of the gas cylinder; the pressure gauge is arranged on the valve body for displaying the outlet pressure.

[0011] The air inlet joint is arranged in the valve body, and an air inlet gasket is arranged between the air inlet joint and the valve body to enhance the seal. A through hole is provided in the middle of the air inlet joint for air passage; the pressure-reducing seat is sleeved on the valve post, and a pressure-reducing spring is arranged between the pressure-reducing seat and the valve post. The stop valve core is arranged at the top of the valve post, and the stop valve core matches the through hole on the air inlet joint, and air passage grooves are arranged around the through hole; the inner seal ring of the valve post is sleeved on the inner small post, and a seal is formed between the pressure-reducing seat and the inner small post of the valve post. A small post air hole communicating with the air passage groove is provided on the inner small post of the valve post, and the small post air hole is located above the inner seal ring of the valve post. A small post air passage communicating the small post air hole with the bottom of the valve post is provided in the middle of the inner small post of the valve post; the outer seal ring of the valve post is arranged outside the valve post, so that a sealing structure is formed between the valve post and the valve body.

[0012] The base has a "convex" structure, including a central convex part and a peripheral thin edge. A set of base air holes and screw mounting holes are provided on the peripheral thin edge; the base air holes include through holes and breathing holes; the flow rate knob matches the base and is sleeved on the base. The flow rate knob is provided with a flow rate knob through hole matching the base air holes and a set of flow rate adjustment holes; a knob sealing ring is provided in the base air holes; a waist-shaped pressure chamber and a stepped through hole in the middle are provided in the central convex part, and a central convex part air hole is also provided on the central convex part to penetrate the upper surface, the waist-shaped pressure chamber and the stepped through hole of the central convex part; the pure rubber diaphragm is covered on the upper surface of the base, and the pure rubber diaphragm is provided with a pure rubber diaphragm air hole matching the central convex part air hole; the base gland is located between the valve post and the pure rubber diaphragm, and a gland sealing ring is arranged on the side wall of the base gland, so that a sealing structure is formed between the base gland and the valve body; a base gland ventilation hole is provided in the middle of the base gland, a base gland air hole matching the pure rubber diaphragm air hole is provided beside the base gland ventilation hole, a base gland air passage groove is provided around the base gland ventilation hole on the lower surface of the base gland, and a base gland air passage penetrating the side wall and the base gland air passage groove of the base gland is provided inside the base gland; a constant ventilation passage communicating with the upper part of the base gland and an adjustment ventilation passage communicating with the side wall of the base gland are provided in the side wall of the valve body; a base sealing ring is provided on the side wall of the central convex part, so that a sealing structure is formed between the central convex part and the valve body; the base spring is arranged in the stepped through hole, the base spring cap is located between the base spring and the pure rubber diaphragm, and the base spring is used to press the pure rubber diaphragm against the lower surface of the base gland to block the base gland ventilation hole; a gear spring and a gear ball are provided on the side wall of the central convex part below the base sealing ring, and a matching gear tooth is provided in the flow rate knob; the composite diaphragm is covered on the lower surface of the base; an upper cover cavity matching the composite diaphragm is provided in the upper cover, the upper cover cavity communicates with the air outlet nozzle, an upper cover air hole matching the base air holes is provided on the edge of the upper cover, the upper cover air hole communicates with the air outlet nozzle, a diaphragm spring and a diaphragm adjustment screw matching the composite diaphragm are provided in the upper cover cavity, and the diaphragm spring is used to press the composite diaphragm against the lower surface of the base to block the stepped through hole.

[0013] The upper cover seals the breathing component and the decompression component in the valve body through upper cover screws.

[0014] Furthermore, for the oxygen-saving valve, a filter block is provided between the air inlet joint and the valve body. The filter block is arranged in the through hole of the air inlet joint for filtering gas.

[0015] Furthermore, for the oxygen-saving valve, the flow rate adjustment holes are opposite to the breathing holes on the base and there are nine of them, and the nine flow rate adjustment holes are arranged in ascending order from small to large.

[0016] Further, the oxygen-saving valve is characterized in that the cut-off valve core is a soft rubber block, a conical air nozzle is arranged at the butt joint of the through hole in the middle of the air inlet joint and the cut-off valve core, and the cut-off valve core covers the conical air nozzle to apply a certain pressure to the conical air nozzle, thereby achieving pressure reduction.

[0017] Further, the oxygen-saving valve is characterized in that a pressure relief hole is provided on the air inlet block, the pressure relief hole connects the side wall and the bottom surface of the air inlet block and does not communicate with the through hole in the middle of the air inlet joint, and a valve body pressure relief hole matching with it is provided at the corresponding position of the valve body.

[0018] Further, the oxygen-saving valve is characterized in that a needle valve and a needle valve sealing ring are arranged on the side wall of the central convex part for adjusting the gas flow rate entering the waist-shaped pressure chamber and the stepped through hole from the air holes in the central convex part.

[0019] Further, the oxygen-saving valve is characterized in that a valve body sealing ring is provided at the butt joint of the constant air passage and the regulating air passage in the side wall of the valve body and the flow control knob, and grooves for installing the valve body sealing ring are provided on the constant air passage and the regulating air passage.

[0020] The technical effects of the present invention are as follows: This design is a pure mechanical structure and does not require an additional power supply compared with the pulse valve in the prior art. Oxygen supply is provided when the user inhales, and oxygen supply is closed when the user exhales.

[0021] The flow control knob can achieve air holding, constant air supply, and multi-stage flow regulation. The multi-stage flow regulation can provide oxygen supply when the user inhales and close the oxygen supply when the user exhales.

[0022] The soft cut-off valve core is used to reduce the pressure of the gas supplied by the gas cylinder, so that the pressure of the decompressed oxygen will not fluctuate greatly with the size of the gas pressure in the gas cylinder, and the purpose of stable oxygen supply can be achieved.

[0023] When the oxygen pressure supplied by the gas cylinder is too high, the oxygen entering between the air inlet joint and the pressure reducing seat will cause the pressure reducing spring to contract, and then the pressure reducing seat sealing ring will be separated from the air inlet joint, releasing the sealing state at this place, so that the oxygen can be discharged from the pressure relief hole on the air inlet joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Exploded view of the oxygen-saving valve.

[0025] Figure 2 Cross-sectional view of the oxygen-saving valve when it is in the constant-on state.

[0026] Figure 3 Cross-sectional view of the oxygen-saving valve in the breathing gear.

[0027] Figure 4 For Figure 3 Enlarged view of part A in

[0028] Among them, 1 is the locking screw rod, 2 is the dental brace, 3 is the valve body, 4 is the positioning pin, 5 is the pressure gauge, 6 is the filter block, 7 is the valve body sealing ring, 8 is the air inlet gasket, 9 is the air inlet joint, 10 is the stop valve core, 11 is the pressure reducing seat sealing ring, 12 is the pressure reducing seat, 13 is the inner sealing ring of the valve column, 14 is the pressure reducing spring, 15 is the valve column, 16 is the outer sealing ring of the valve column, 17 is the locking screw, 18 is the base gland, 19 is the gland sealing ring, 20 is the pure rubber diaphragm, 21 is the base spring cap, 22 is the base spring, 23 is the flow rate knob, 24 is the base sealing ring, 25 is the knob sealing ring, 26 is the base, 27 is the needle valve sealing ring, 28 is the needle valve, 29 is the gear ball, 30 is the gear spring, 31 is the composite diaphragm, 32 is the diaphragm spring, 33 is the diaphragm adjusting screw, 34 is the upper cover, 35 is the air outlet nozzle, 36 is the upper cover screw, 3-1 is the valve body pressure relief hole, 3-2 is the constant ventilation channel, 3-3 is the adjustment airway, 9-1 is the pressure relief valve, 9-2 is the air passing groove, 15-1 is the small column air hole, 15-2 is the small column airway, 18-1 is the base gland ventilation hole, 18-2 is the base gland air hole, 20-1 is the pure rubber diaphragm air hole, 23-1 is the constant through hole of the flow rate knob, 23-2 is the flow rate adjustment hole, 26-1 is the waist-shaped pressure chamber, 26-2 is the stepped through hole, 26-3 is the central convex part air hole, 34-1 is the upper cover air passing hole, 34-2 is the upper cover cavity. Detailed implementation mode

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] An oxygen-saving valve is composed of a connection component, a pressure reducing component and a breathing component.

[0031] The connection component includes a locking screw rod, a dental brace, a valve body, a positioning pin and a pressure gauge.

[0032] The pressure reducing component includes an air inlet joint, a stop valve core, a pressure reducing seat, a valve column, a pressure reducing spring, an inner sealing ring of the valve column and an outer sealing ring of the valve column.

[0033] The breathing component includes a base, a base gland, a gland sealing ring, a base spring, a base spring cap, a pure rubber diaphragm, a base sealing ring, a flow rate knob, a composite diaphragm, a diaphragm spring, a diaphragm adjusting screw, an upper cover and an air outlet nozzle.

[0034] The locking screw rod is connected to the valve body through the dental brace; the positioning pin is arranged in the valve body for positioning the air outlet of the gas cylinder; the pressure gauge is arranged on the valve body for displaying the outlet pressure.

[0035] The intake joint is arranged inside the valve body, and an intake gasket is provided between the intake joint and the valve body to enhance the seal. A through hole is provided in the middle of the intake joint for air passage; the pressure reducing seat is sleeved on the valve stem, and a pressure reducing spring is provided between the pressure reducing seat and the valve stem. The stop valve core is arranged at the top of the valve stem, and the stop valve core matches the through hole on the intake joint. A conical air nozzle is provided at the docking place of the through hole in the middle of the intake joint and the stop valve core, and an air passage groove is provided around the conical air nozzle; the inner seal ring of the valve stem is sleeved on the inner small column, and a seal is formed between the pressure reducing seat and the inner small column of the valve stem. A small column air hole is provided on the inner small column of the valve stem, and the small column air hole is located above the inner seal ring of the valve stem. A small column air passage connecting the small column air hole and the bottom of the valve stem is provided in the middle of the inner small column of the valve stem; the outer seal ring of the valve stem is arranged outside the valve stem, so that a sealing structure is formed between the valve stem and the valve body.

[0036] The base has a "convex" structure, including a central convex part and a peripheral thin edge. A group of base air through holes and screw mounting holes are provided on the peripheral thin edge; the base air through holes include a normal through hole and a breathing hole; the flow rate knob matches the base and is sleeved on the base. A group of flow rate adjustment holes are provided on the flow rate knob; a knob seal ring is provided in the base air through hole; a waist-shaped pressure chamber and a stepped through hole in the middle are provided in the central convex part, and a central convex part air hole is also provided on the central convex part to penetrate the upper surface, the waist-shaped pressure chamber and the stepped through hole of the central convex part. And a needle valve and a needle valve seal ring are provided on the side wall of the central convex part to adjust the gas flow rate entering the waist-shaped pressure chamber and the stepped through hole from the central convex part air hole; the pure rubber diaphragm is covered on the upper surface of the base, and a pure rubber diaphragm air hole matching the central convex part air hole is provided on the pure rubber diaphragm; the base pressing cover is covered on the pure rubber diaphragm, and a pressing cover seal ring is provided on the side wall of the base pressing cover, so that a sealing structure is formed between the base pressing cover and the valve body; a base pressing cover air vent is provided in the middle of the base pressing cover, and a base pressing cover air hole matching the pure rubber diaphragm air hole is provided beside the base pressing cover air vent. An air passage groove of the base pressing cover is provided around the lower surface of the base pressing cover where the base pressing cover air vent is located, and a base pressing cover air passage penetrating the side wall and the air passage groove of the base pressing cover is provided inside the base pressing cover; a normal air passage penetrating the upper part of the base pressing cover and an adjustment air passage penetrating the side wall of the base pressing cover are provided on the valve body; a base seal ring is provided on the side wall of the central convex part, so that a sealing structure is formed between the central convex part and the valve body; the base spring is arranged in the stepped through hole, and the base spring pressing cap is located between the base spring and the pure rubber diaphragm; a gear spring and a gear ball are provided on the side wall of the central convex part below the base seal ring, and a matching gear tooth is provided in the flow rate knob; the composite diaphragm is covered on the lower surface of the base; an upper cover cavity matching the composite diaphragm is provided in the upper cover, the upper cover cavity is communicated with the air outlet nozzle, an upper cover air through hole matching the base air through hole is provided on the edge of the upper cover, the upper cover air through hole is communicated with the air outlet nozzle, and a diaphragm spring and a diaphragm adjustment screw matching the composite diaphragm are provided in the upper cover cavity.

[0037] The upper cover seals the breathing component and the decompression component in the valve body through upper cover screws.

[0038] During use, the gear is adjusted by rotating the flow rate knob. The off gear, constant on gear, and adjustment gears can be selected. Multiple adjustment gears can be set as needed. In this embodiment, nine adjustment gears are set.

[0039] After connecting the gas cylinder, the gas cylinder discharges gas, enters the through hole in the middle of the intake joint through the filter block, and enters the cavity between the intake joint and the decompression seat after being decompressed by the cut-off valve core against the through hole. Due to the decompression seat sealing ring provided on the upper part of the decompression seat and the valve column inner sealing ring on the small column inside the valve column, the gas is restricted between the intake joint, the decompression seat, and the small column inside the valve column. Then, it enters the lower space of the valve column through the small column air holes and small column air channels on the small column inside the valve column. The valve column outer sealing ring and the base gland sealing ring provided on the side wall of the valve column restrict the gas between the valve column and the base gland. The constant ventilation channel on the side wall of the valve body is connected to this area. The base gland is provided with a base gland ventilation hole and a base gland air hole. Among them, the base gland ventilation hole is connected to the base gland air passage groove, the base gland air channel, and the adjustment air channel. At the same time, the pure rubber diaphragm located below the base gland can block the base gland ventilation hole. The base gland air hole is always unblocked with the pure rubber diaphragm air hole and the central protrusion air hole, so that the gas can enter the waist-shaped pressure chamber and the stepped through hole. In order to adjust the flow rate of the gas entering the waist-shaped pressure chamber and the stepped through hole, a needle valve is provided on the central protrusion air hole. The base sealing ring on the base allows the gas to be discharged only from the central protrusion air hole and the adjustment air channel.

[0040] In the constant on gear, the flow rate knob constant through hole, the base through hole, the upper cover through hole, the upper part of the base gland, and the constant ventilation channel are interconnected to achieve constant ventilation.

[0041] In the adjustment gear, the gas supply stops during exhalation and resumes during inhalation.

[0042] When exhaling, the gas discharged from the air outlet nozzle decreases, so that the gas preferentially enters the upper cover cavity, increasing the air pressure in the upper cover cavity. Furthermore, the composite diaphragm blocks the stepped through hole in the column under the action of the air pressure in the upper cover cavity and the diaphragm spring, making the gas in the waist-shaped pressure chamber and the stepped through hole have nowhere to be discharged. The base gland air hole, the pure rubber diaphragm air hole, and the central protrusion air hole are always unblocked, allowing the gas to continuously enter the waist-shaped pressure chamber and the stepped through hole, increasing the air pressure there. Furthermore, the air pressure there and the elastic force of the base spring are greater than the air pressure above the pure rubber diaphragm, causing the pure rubber diaphragm to block the base gland ventilation hole, achieving the stop of gas supply.

[0043] When inhaling, the air pressure inside the air outlet nozzle decreases, that is, the air pressure inside the upper cover cavity decreases. The air pressure inside the stepped through-hole is greater than the sum of the air pressure inside the upper cover cavity and the elastic force of the diaphragm spring, causing the composite diaphragm to separate from the lower surface of the base, releasing the blockage of the stepped through-hole, and allowing the gas in the waist-shaped pressure chamber and the stepped through-hole to be discharged (since there is no sealing ring provided below the base, the gas is discharged from the stepped through-hole at will). Then, the air pressure in the waist-shaped pressure chamber and the stepped through-hole decreases, that is, the sum of the air pressure in the waist-shaped pressure chamber and the elastic force of the base spring is less than the pressure exerted by the air pressure above the pure rubber diaphragm, causing the pure rubber diaphragm to separate from the base gland, that is, releasing the blockage of the air vent hole of the base gland, and allowing the air vent hole of the base gland to communicate with the adjustment air passage, realizing air supply. The magnitude of the air supply flow is achieved through a set of flow adjustment holes on the flow knob.

Claims

1. An oxygen-saving valve, characterized in that: The oxygen-saving valve is composed of a connecting component, a pressure-reducing component and a breathing component; The connection components include locking screw, tooth sleeve, valve body, positioning pin and pressure gauge; The pressure reducing assembly includes an air inlet joint, a stop valve core, a pressure reducing seat, a valve column, a pressure reducing spring, an inner sealing ring of the valve column, and an outer sealing ring of the valve column; The breathing assembly includes a base, a base gland, a gland sealing ring, a base spring, a base compression spring cap, a pure rubber diaphragm, a base sealing ring, a flow knob, a composite diaphragm, a diaphragm spring, a diaphragm adjusting screw, an upper cover, and an air outlet; The locking screw is connected to the valve body through a threaded sleeve; a positioning pin is arranged in the valve body to locate the gas outlet of the gas cylinder; a pressure gauge is arranged on the valve body to display the gas pressure; The air inlet joint is arranged in the valve body, and an air inlet gasket is arranged between the valve body, and a through hole is arranged in the middle of the air inlet joint for ventilation; the decompression seat is sleeved on the valve column, and a decompression seat sealing ring is arranged on the upper surface of the decompression seat, so that a sealing structure is formed between the decompression seat and the air inlet joint, a decompression spring is arranged between the decompression seat and the valve column, a stop valve core is arranged on the top of the valve column, the stop valve core matches the through hole on the air inlet joint, and an air groove is arranged around the through hole at the bottom of the air inlet joint; the inner sealing ring of the valve column is sleeved on the inner small column, and a seal is formed between the decompression seat and the inner small column of the valve column, a small column air hole is arranged on the inner small column of the valve column to be connected with the air groove, and the small column air hole is located on the upper part of the inner sealing ring of the valve column, and a small column airway connecting the small column air hole and the bottom of the valve column is arranged in the middle of the inner small column of the valve column; the outer sealing ring of the valve column is arranged on the outside of the valve column, so that a sealing structure is formed between the valve column and the valve body; The base is a "convex" structure, including a central raised portion and an outer thin edge, and a group of base air holes and screw mounting holes are provided on the outer thin edge; the base air holes include a normal through hole and a breathing hole; the flow knob matches the base and is sleeved on the base, and the flow knob is provided with a flow knob normal through hole and a group of flow adjustment holes that match the base air holes; a knob sealing ring is provided in the base air hole; a waist-shaped pressure chamber and a stepped through hole located in the middle are provided in the central raised portion, and a central raised portion air hole is also provided on the central raised portion. The upper surface of the raised part, the waist-shaped pressure chamber and the stepped through hole; the pure rubber diaphragm is covered on the upper surface of the base, and the pure rubber diaphragm is provided with a pure rubber diaphragm air hole matching the central raised part air hole; the base gland is located between the valve column and the pure rubber diaphragm, and a gland sealing ring is arranged on the side wall of the base gland, so that a sealing structure is formed between the base gland and the valve body; a base gland vent hole is arranged in the middle of the base gland, and a base gland vent hole matching the pure rubber diaphragm air hole is arranged next to the base gland vent hole, and a base gland vent hole is arranged around the base gland vent hole on the lower surface of the base gland The base gland is provided with a base gland air passage that passes through the base gland side wall and the base gland air passage groove; the valve body side wall is provided with a normal air passage that passes through the upper part of the base gland and a regulating air passage that passes through the side wall of the base gland; a base sealing ring is provided on the side wall of the central raised part, so that a sealing structure is formed between the central raised part and the valve body; the base spring is arranged in the stepped through hole, the base compression spring cap is located between the base spring and the pure rubber diaphragm, and the base spring is used to press the pure rubber diaphragm against the lower surface of the base gland to block the base gland vent hole; The side wall of the central raised portion is located below the base sealing ring and is provided with a gear spring and a gear marble, and the flow knob is provided with a matching gear tooth; the composite diaphragm covers the lower surface of the base; the upper cover is provided with an upper cover cavity matching the composite diaphragm, the upper cover cavity is connected with the air outlet nozzle, the upper cover edge is provided with an upper cover air hole matching the base air hole, the upper cover air hole is connected with the air outlet nozzle, and the upper cover cavity is provided with a diaphragm spring and a diaphragm adjustment screw matching the composite diaphragm, the diaphragm spring is used to press the composite diaphragm against the lower surface of the base to block the stepped through hole; The upper cover seals the breathing component and the decompression component in the valve body through the upper cover screws.

2. The oxygen-saving valve according to claim 1, characterized in that: A filter block is provided between the air inlet connector and the valve body. The filter block is arranged in the through hole of the air inlet connector and is used for filtering gas.

3. The oxygen-saving valve according to claim 1, characterized in that: The stop valve core is a soft rubber block, and a conical air nozzle is arranged at the joint between the through hole in the middle of the air inlet joint and the stop valve core. The stop valve core covers the conical air nozzle and gives the conical air nozzle a certain pressure, thereby achieving pressure reduction.

4. The oxygen-saving valve according to claim 1, characterized in that: The flow regulating holes are opposite to the breathing holes on the base, and nine flow regulating holes are provided. The nine flow regulating holes are arranged in sequence from small to large.

5. The oxygen-saving valve according to claim 1, characterized in that: A pressure relief hole is provided on the air intake block, which connects the side wall and the bottom surface of the air intake block, and is not connected to the through hole in the middle of the air intake joint. It is isolated by a pressure reducing seat sealing ring, and a matching valve body pressure relief hole is provided at the corresponding position of the valve body.

6. The oxygen-saving valve according to claim 1, characterized in that: A needle valve and a needle valve sealing ring are arranged on the side wall of the central raised portion, and are used to adjust the gas flow from the air hole of the central raised portion into the waist-shaped pressure cabin and the stepped through hole.

7. The oxygen-saving valve according to claim 1, characterized in that: A valve body sealing ring is provided at the joint between the normal air passage and the regulating air passage in the side wall of the valve body and the flow knob, and a groove for installing the valve body sealing ring is provided on the normal air passage and the regulating air passage.

8. The oxygen-saving valve according to claim 1, characterized in that: The stepped through hole is located on the lower surface of the base and is designed as a conical small hole structure, which plays a role in limiting exhaust and facilitating the sealing of the composite diaphragm.

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