Gas pressure reducer

Abstract

The invention discloses a gas pressure reducer, and belongs to the technical field of pressure reducers. A gas pressure reducer comprises a gas cylinder and a switch assembly fixedly connected to the gas cylinder, and further comprises a pressure reducing assembly fixedly connected to the switch assembly, a split upper shell is fixedly connected to the pressure reducing assembly, a switch button is installed in the split upper shell in a sliding mode, and the switch button is fixedly connected to the pressure reducing assembly. A cleaning part for cleaning the split upper shell is arranged in the split upper shell, when the switch button slides, the cleaning part cleans the interior of the split upper shell, the quantitative component is fixedly connected to the interior of the pressure reduction assembly, a valve rod is connected to the switch button, the valve rod is installed in the quantitative component in a sliding mode, and the valve rod is connected to the pressure reduction assembly. A limiting part for limiting the valve rod is arranged in the quantifying part; the brush plate reciprocates on the inner wall of the split upper shell, so that internal dust is cleaned, dust is effectively prevented from entering the trachea of a user, and the probability of occurrence of respiratory system problems is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure reducers, and in particular to a gas pressure reducer. Background Art

[0002] In high-risk working environments such as mining, chemical industry, and tunnel construction, providing a reliable oxygen supply in emergency situations is the key to ensuring the safety of personnel. In order to adjust the high-pressure gas in the cylinder to the low pressure during operation and maintain the stability of the low pressure during use, a gas pressure reducer is used. A gas pressure reducer is a device used to adjust high-pressure gas to a stable low-pressure gas. In industrial production and laboratory research, it can reduce the gas pressure stored in the high-pressure gas cylinder to the required range for experiment or production through a pressure reducing valve to meet the needs of specific processes and experiments.

[0003] At present, high-pressure oxygen cylinders used in emergency situations all use gas pressure reducers to reduce the air pressure in the cylinders. However, in high-risk working environments such as mines and chemical industries, dust will enter the inside of the pipeline through the air outlet. If the inside of the pipeline is not cleaned regularly, the user will breathe oxygen in large gulps when using it in an oxygen-deficient state, and dust will enter the user's trachea through the air outlet, causing serious respiratory problems. In addition, the user will experience dizziness and general weakness in the oxygen-deficient state. When the user is using it, the switch cannot be pressed continuously and accurately, resulting in the inability to absorb oxygen in time, causing safety hazards. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that in high-risk working environments such as mining and chemical industries, dust will enter the inside of the pipeline through the air outlet. If the inside of the pipeline is not cleaned regularly, the user will breathe oxygen in large gulps when using it in an oxygen-deficient state, and dust will enter the user's trachea through the air outlet, causing serious respiratory system problems. A gas pressure reducer is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A gas pressure reducer comprises a gas cylinder and a switch assembly fixedly connected to the gas cylinder, and further comprises: a pressure reducing assembly fixedly connected to the switch assembly, wherein a split upper shell is fixedly connected to the pressure reducing assembly, a switch button is slidably installed in the split upper shell, a cleaning part for cleaning the split upper shell is provided in the split upper shell, and when the switch button slides, the cleaning part cleans the inside of the split upper shell, and a quantitative component is fixedly connected to the pressure reducing assembly, wherein a valve stem is connected to the switch button, the valve stem is slidably installed in the quantitative component, and a limiting part for limiting the valve stem is provided in the quantitative component.

[0006] Preferably, an air outlet is provided on the split upper shell, an upper buckle is fixedly connected to the switch button, a lower buckle is fixedly connected to the valve stem, and the upper buckle is meshed with the lower buckle.

[0007] In order to ensure the switch is opened and closed in a sealed manner, preferably, a valve core is fixedly connected to the valve stem output end, a split lower shell is fixedly connected inside the pressure reducing assembly, a sealing ring is fixedly connected inside the split lower shell, and the valve core cooperates with the sealing ring.

[0008] In order to make the switch in a normally closed state, further, a compression spring is fixedly connected to the valve core, a free end of the compression spring is fixedly connected to the quantitative component, and a sealing gasket is fixedly connected to the output end of the quantitative component.

[0009] In order to drive the brush plate to move for cleaning, the cleaning part further includes a connecting rod slidably installed in the split upper shell, a pull plate is fixedly connected to the connecting rod, a rotating plate is rotatably installed on the pull plate, a rotating gear is rotatably installed in the split upper shell, and the rotating plate is rotatably installed on the rotating gear, wherein a limiting rod is fixedly connected to the rotating gear, and the limiting rod is rotatably installed in the split upper shell, a moving tooth plate is fixedly connected to the lower buckle, the moving tooth plate is meshed with the rotating gear, and a brush plate is fixedly connected to the connecting rod, and the brush plate fits the inner wall of the split upper shell.

[0010] In order to absorb dust in the split upper shell and clean the air outlet, further, a slide groove is provided on the split upper shell, an airbag is arranged in the slide groove, the connecting rod is fixedly connected to the airbag, a slide plate is slidably installed on the brush plate, the slide plate is fixedly connected to a lifting plate, a plurality of nozzles are arranged on the lifting plate, and the output end of the airbag is connected to the nozzle.

[0011] In order to increase the cleaning force, further, a swing groove is opened on the brush plate, a slide rod is fixedly connected in the swing groove, the slide plate is slidably installed on the slide rod, a return spring is fixedly connected on the slide plate, and the free end of the return spring is fixedly connected to the swing groove, wherein, a push rod is fixedly connected to the lifting plate, a ball is fixedly connected to the push rod, a connecting plate is fixedly connected in the split upper shell, a vibrating tooth plate is fixedly connected on the connecting plate, and the vibrating tooth plate cooperates with the ball.

[0012] In order to keep the switch in a normally open state, further, the limiting portion includes a driving bevel gear rotatably installed on the quantitative component, a threaded rod is rotatably installed in the decompression assembly, a linkage bevel gear is fixedly connected to the threaded rod, and the linkage bevel gear is meshingly installed with the driving bevel gear, wherein a matching rod is meshingly installed on the threaded rod, a butt joint is fixedly connected to the matching rod, the butt joint is matched with the valve stem, and sliders are fixedly connected on both sides of the butt joint, and the sliders are slidably installed in the decompression assembly.

[0013] In order to adjust the oxygen supply, further, the pressure reducing assembly is respectively provided with a safety valve and a quantitative hole, a touch rod is slidably installed in the pressure reducing assembly, a contact is fixedly connected to the touch rod, and a pressure gauge is fixedly connected to the switch assembly.

[0014] In order to achieve automatic closing, further, a self-compensating valve is fixedly connected to the touch rod, a self-compensating spring is fixedly connected to the self-compensating valve, a piston assembly is fixedly connected to the free end of the self-compensating spring, the piston assembly is fixedly connected in the decompression assembly, and the self-compensating valve is sealed with the decompression assembly in the initial state.

[0015] Compared with the prior art, the present invention provides a gas pressure reducer, which has the following beneficial effects: 1. The gas pressure reducer drives the movable tooth plate to move downward by the lower buckle, and the movable tooth plate drives the rotating gear to rotate, thereby driving the brush plate to reciprocate on the inner wall of the split upper shell to clean the internal dust, effectively preventing dust from entering the user's trachea, thereby reducing the probability of respiratory system problems. At the same time, due to the reciprocating motion of the brush plate, the air outlet can be continuously cleaned to ensure unobstructed oxygen supply.

[0016] 2. The gas pressure reducer squeezes and stretches the airbag when the connecting rod moves, thereby realizing the inflation and deflation of the airbag, and cooperates with the nozzle. When the brush plate brushes the inside of the split upper shell, the nozzle absorbs the dust through the stretching of the airbag, further improving the cleaning efficiency. In addition, the spraying action of the nozzle can effectively clean the air outlet to ensure unobstructed oxygen supply.

[0017] 3. The gas pressure reducer, through the cooperation between the ball and the vibrating tooth plate, when the connecting rod drives the nozzle to move up and down, a number of protrusions cooperating with the ball are arranged on the vibrating tooth plate. When the ball passes through the vibrating tooth plate, the slide plate is driven to slide left and right on the slide rod through the push rod, thereby expanding the working range of the nozzle and improving the cleaning efficiency.

[0018] 4. The gas pressure reducer drives the bevel gear to rotate through the lower buckle, and at the same time, through the linkage of the threaded rod and the matching rod, it can accurately adjust the position of the valve stem to control the flow of gas, which not only improves the accuracy of the gas pressure reducer, but also ensures that users can obtain a stable and safe oxygen supply in different working environments.

[0019] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. The brush plate of the present invention reciprocates on the inner wall of the split upper shell to clean the internal dust, effectively preventing dust from entering the user's trachea, thereby reducing the probability of respiratory system problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a gas pressure reducer proposed by the present invention; Figure 2 A schematic diagram of the structure of a pressure reducing assembly of a gas pressure reducer proposed by the present invention; Figure 3 A schematic diagram of the internal structure of a pressure reducing assembly of a gas pressure reducer proposed by the present invention Figure 1 ; Figure 4 A schematic diagram of the split upper shell structure of a gas pressure reducer proposed by the present invention; Figure 5 A schematic diagram of the internal structure of a split upper shell of a gas pressure reducer proposed by the present invention; Figure 6 A schematic diagram of the connecting rod structure of a gas pressure reducer proposed by the present invention; Figure 7 A schematic diagram of the structure of a quantitative component of a gas pressure reducer proposed by the present invention; Figure 8 A schematic diagram of the internal structure of a pressure reducing assembly of a gas pressure reducer proposed by the present invention Figure 2 ; Fig. 9 A gas pressure reducer proposed by the present invention Figure 7 Enlarged view of point A in the middle; Fig.10 A gas pressure reducer proposed by the present invention Figure 6 Enlarged view of point B in the middle.

[0021] In the figure: 1. gas cylinder; 11. pressure gauge; 12. switch assembly; 13. vibration tooth plate; 14. connecting plate; 2. pressure reducing assembly; 21. touch rod; 22. contact; 23. safety valve; 24. quantitative hole; 25. self-replenishing valve; 26. piston assembly; 27. self-replenishing spring; 3. split upper shell; 31. air outlet; 32. switch button; 33. split lower shell; 34. quantitative component; 35. sealing gasket; 36. upper buckle; 37. lower buckle; 38. movable tooth plate; 39. valve stem; 310. sealing Sealing ring; 311, valve core; 312, compression spring; 313, slide groove; 314, driving bevel gear; 315, linkage bevel gear; 316, threaded rod; 317, matching rod; 318, abutment; 319, slider; 4, rotating gear; 41, connecting rod; 42, limiting rod; 43, rotating plate; 44, pulling plate; 45, brush plate; 46, swinging groove; 47, sliding rod; 48, reset spring; 49, slide plate; 410, lifting plate; 411, nozzle; 412, abutment; 413, ball. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] Example 1

[0025] Reference Figure 1-Figure 10, a gas pressure reducer, which is designed to ensure that the gas pressure can be safely and stably regulated during use. The pressure reducer includes a gas cylinder 1, to which a switch assembly 12 is fixedly connected. The function of the switch assembly 12 is to control the flow of gas and ensure that the gas supply can be quickly cut off or opened when needed. In addition, the pressure reducer also includes a pressure reducing assembly 2, which is fixedly connected to the switch assembly 12. A split upper shell 3 is fixedly connected to the pressure reducing assembly 2, and the design of the split upper shell 3 allows a switch button 32 to be slidably installed inside it. The sliding operation of the switch button 32 can control the flow of gas, thereby achieving the regulation of gas pressure. In order to ensure the cleanliness and sanitation of the pressure reducer, a cleaning part is set in the split upper shell 3. The function of this cleaning part is to clean the inside of the split upper shell 3 when the switch button 32 slides to prevent the accumulation of dust and dirt, thereby ensuring the normal operation of the pressure reducer and extending its service life. Inside the pressure reducing assembly 2, a quantitative component 34 is also fixedly connected. The function of the quantitative component 34 is to ensure that the gas can be adjusted according to the predetermined amount when passing through the pressure reducer, so as to achieve the purpose of accurately controlling the gas flow. In order to further ensure the stability and safety of the gas flow, a valve stem 39 is connected to the switch button 32. The valve stem 39 is slidably installed in the quantitative component 34, and its sliding action can control the flow of gas. A limiter is also provided inside the quantitative component 34, and its function is to limit the valve stem 39 to prevent it from excessive sliding, thereby ensuring the stability and safety of the gas flow.

[0026] Reference Figure 1-Figure 3 In the upper part of the split upper shell 3, some vent holes 31 are specially opened. The function of these vent holes 31 is to discharge excess gas during the operation of the equipment to ensure the stability of the internal pressure. Above the switch button 32, a cleverly designed upper buckle 36 is fixedly connected. This upper buckle 36 not only fixes the switch button 32, but also can be effectively connected with other components when needed. At the same time, a lower buckle 37 is also fixedly connected to the upper end of the valve stem 39. This lower buckle 37 is engaged with the upper buckle 36 to form a reliable connection mechanism, ensuring the stability and safety of the entire system.

[0027] The output end of the valve stem 39 is fixedly connected to a precise valve core 311, which plays a crucial regulating role in the operation of the equipment. It can accurately control the flow of fluid and ensure the normal operation of the equipment. The interior of the pressure reducing assembly 2 is fixedly connected to the split lower shell 33, which not only provides a solid support for the entire system, but also has a sealing ring 310 fixedly connected inside. This sealing ring 310 is tightly matched with the valve core 311 to ensure that there will be no leakage in a high-pressure environment, thereby ensuring the sealing performance of the system. In order to further ensure the stability and reliability of the valve core 311, a compression spring 312 is also fixedly connected to the valve core 311. The compression spring 312 plays a role of buffering and resetting during the operation of the equipment. It can ensure that the valve core 311 can quickly return to its original position after being subjected to external force, thereby ensuring the normal operation of the system. The free end of the compression spring 312 is fixedly connected to the inside of the quantitative component 34. The quantitative component 34 plays a role of quantitative control during the operation of the equipment. It can accurately control the flow rate of the fluid to ensure the accurate operation of the equipment. The output end of the quantitative component 34 is also fixedly connected to a sealing gasket 35. This sealing gasket 35 not only plays a sealing role, but also can prevent external impurities from entering during the operation of the equipment, thereby ensuring the cleanliness and stability of the interior of the equipment. Through these precise designs and reasonable layouts, the entire system can operate efficiently and stably, ensuring the performance and safety of the equipment.

[0028] Reference Figure 4-Figure 10The cleaning part includes a connecting rod 41 slidably installed in the split upper shell 3, a pull plate 44 is fixedly connected to the connecting rod 41, a rotating plate 43 is rotatably installed on the pull plate 44, a rotating gear 4 is rotatably installed in the split upper shell 3, and the rotating plate 43 is rotatably installed on the rotating gear 4. When the rotating gear 4 rotates, the rotating plate 43 is simultaneously driven to rotate, and the rotating plate 43 drives the pull plate 44 to move, so that the pull plate 44 reciprocates according to the rotation of the rotating gear 4, wherein a limit rod 42 is fixedly connected to the rotating gear 4, and the limit rod 42 is rotatably installed in the split upper shell 3, and a moving tooth plate 38 is fixedly connected to the lower buckle 37, and the moving tooth plate 38 is meshed with the rotating gear 4. When a person presses When the switch button 32 is turned, the upper buckle 36 drives the lower buckle 37 to move downward, and the lower buckle 37 drives the movable tooth plate 38 to move, and the movable tooth plate 38 drives the rotating gear 4 to rotate. A brush plate 45 is fixedly connected to the connecting rod 41, and the brush plate 45 is attached to the inner wall of the split upper shell 3. When the pull plate 44 drives the brush plate 45 to move up and down, the brush plate 45 brushes and cleans the inner wall of the split upper shell 3. A slide groove 313 is provided on the split upper shell 3, and an airbag is provided in the slide groove 313. The connecting rod 41 is fixedly connected to the airbag. When the connecting rod 41 slides in the slide groove 313, the airbag is squeezed or stretched to inflate or deflate the airbag. A slide plate 4 is slidably installed on the brush plate 45. 9. The slide plate 49 is fixedly connected to the lifting plate 410. The lifting plate 410 is provided with a plurality of nozzles 411. The output end of the airbag is connected to the nozzle 411. When the connecting rod 41 rises and falls, the nozzle 411 is synchronously driven to move, and the airbag is inflated and deflated by the movement of the connecting rod 41. The dust is adsorbed and collected in cooperation with the brush head. The nozzle 411 at the air outlet 31 is connected to the air outlet of the airbag. When the airbag is squeezed, the nozzle 411 sprays air to the air outlet 31 to prevent the air outlet 31 from being blocked. A swing groove 46 is provided on the brush plate 45. A slide bar 47 is fixedly connected in the swing groove 46. The slide plate 49 is slidably installed on the slide bar 47. A return spring 4 is fixedly connected to the slide plate 49. 8. The free end of the reset spring 48 is fixedly connected to the swing groove 46, wherein the lifting plate 410 is fixedly connected with a push rod 412, and the push rod 412 is fixedly connected with a ball 413. The split upper shell 3 is fixedly connected with a connecting plate 14, and the connecting plate 14 is fixedly connected with a vibrating tooth plate 13, and the vibrating tooth plate 13 cooperates with the ball 413. When the connecting plate 14 moves up and down, the ball 413 moves on the vibrating tooth plate 13, and the vibrating tooth plate 13 is provided with a plurality of protrusions that cooperate with the ball 413. When the ball 413 passes through the vibrating tooth plate 13, the slide plate 49 is driven to slide left and right on the slide bar 47 through the push rod 412, thereby expanding the working range of the nozzle 411 and improving the cleaning efficiency.

[0029] Reference Figure 7-Figure 9The limiting part includes a driving bevel gear 314 rotatably mounted on the quantitative component 34, a threaded rod 316 is rotatably mounted in the decompression assembly 2, a linkage bevel gear 315 is fixedly connected to the threaded rod 316, and the linkage bevel gear 315 is meshed and mounted with the driving bevel gear 314, wherein a matching rod 317 is meshed and mounted on the threaded rod 316, a butt joint 318 is fixedly connected to the matching rod 317, the butt joint 318 is matched with the valve stem 39, and sliders 319 are fixedly connected on both sides of the butt joint 318, and the slider 319 is slidably mounted in the decompression assembly 2, and when the switch button 32 is pressed, the switch The button 32 drives the upper buckle 36 to push the lower buckle 37 to press down. When the lower buckle 37 moves to the driving bevel gear 314, the movable tooth plate 38 fixedly connected to the lower buckle 37 is inserted into the groove provided on the driving bevel gear 314. The user drives the driving bevel gear 314 to rotate by turning the switch button 32, thereby driving the linkage bevel gear 315 to rotate. The linkage bevel gear 315 drives the threaded rod 316 to rotate to make the abutment 318 slide. The abutment 318 moves to the surface of the valve stem 39 to abut against it and fix it, thereby preventing the switch button 32 from being pressed and falling off due to dizziness and lack of strength when the user is short of oxygen.

[0030] Reference Figure 1-Figure 3 A safety valve 23 and a quantitative hole 24 are respectively provided on the upper part of the pressure reducing assembly 2. A touch rod 21 is slidably installed inside the pressure reducing assembly 2. A contact 22 is fixedly connected to the touch rod 21. A pressure gauge 11 is fixedly connected to the switch assembly 12 to monitor the air pressure in real time. In addition, a self-compensating valve 25 is fixedly connected to the touch rod 21. A self-compensating spring 27 is fixedly connected to the self-compensating valve 25. The free end of the self-compensating spring 27 is fixedly connected to a piston assembly 26. The piston assembly 26 is fixedly connected to the inside of the pressure reducing assembly 2 to ensure its stability and reliability. The self-compensating valve 25 is sealed with the pressure reducing assembly 2 in the initial state to ensure the safe and stable operation of the system.

[0031] In the present invention, when the user presses the switch button 32, the switch button 32 will drive the lower buckle 37 to descend. When the lower buckle 37 descends, the tooth plate 38 is moved to rotate the rotating gear 4, thereby realizing the reciprocating motion of the rotating plate 43 and the pulling plate 44. This reciprocating motion enables the brush plate 45 on the connecting rod 41 to brush up and down on the inner wall of the split upper shell 3 to effectively remove dirt and impurities on the inner wall. At the same time, the airbag in the slide groove 313 is inflated and deflated under the sliding action of the connecting rod 41, and cooperates with the cleaning action of the brush plate 45 to further improve the cleaning efficiency.

[0032] During the cleaning process, the nozzle 411 on the lifting plate 410 moves synchronously through the inflation and deflation actions of the airbag, and the nozzle 411 moves up and down driven by the connecting rod 41, thereby achieving the adsorption of dust swept by the brush plate 45 on the inner wall of the split upper shell 3. The adsorption action of the nozzle 411 helps to adsorb and collect dust and dirt to ensure the cleanliness of the inside of the equipment. In addition, the coordinated use of the slide bar 47 and the slide plate 49 in the swing groove 46 enables the nozzle 411 to slide left and right, further expanding the adsorption range and improving the cleaning efficiency. The meshing installation of the driving bevel gear 314 and the linkage bevel gear 315, as well as the linkage effect of the threaded rod 316 and the matching rod 317, enable the user to accurately control the operating state of the equipment when pressing the switch button 32. The coordinated use of the self-compensating valve 25 and the self-compensating spring 27 ensures the stability of the air pressure inside the decompression assembly 2, thereby ensuring the safe operation of the entire system.

[0033] When the gas enters the pressure reducer from a high-pressure environment, it first passes through the safety valve 23, which can automatically open when the gas pressure exceeds the set value to release excess pressure and ensure the safety of the entire system. The gas then passes through the quantitative hole 24, which can control the outflow of the gas according to the set flow rate to ensure that the gas enters the pressure reducing assembly 2 at a stable speed. Inside the pressure reducing assembly 2, the gas first contacts the contact 22 on the touch rod 21, and the contact 22 can sense the pressure change of the gas and transmit the signal to the barometer 11 on the switch assembly 12, thereby realizing real-time monitoring of the gas pressure. If the gas pressure is too high, the touch rod 21 will push the self-compensating valve 25 to open and release part of the gas to reduce the pressure. The opening and closing of the self-compensating valve 25 is controlled by the self-compensating spring 27, which ensures the sensitivity and reliability of the valve action.

[0034] After the self-compensating valve 25 is closed, the gas continues to be further decompressed through other components inside the decompression assembly 2. Under the action of the self-compensating spring 27, the piston assembly 26 can move accordingly according to the change in gas pressure, thereby adjusting the pressure balance inside the decompression assembly 2. Through this series of precise control and adjustment, the gas is finally output at a safe and stable pressure to meet the user's needs. The design of the entire gas pressure reducer fully considers safety, stability and precise control, ensuring reliable operation in various working environments. Through reasonable structural layout and precise component coordination, the gas pressure reducer not only improves work efficiency, but also greatly enhances the service life and safety of the equipment.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas pressure reducer, comprising a gas cylinder (1) and a switch assembly (12) fixedly connected to the gas cylinder (1), characterized in that: Also includes: a pressure reducing assembly (2) fixedly connected to the switch assembly (12), The decompression assembly (2) is fixedly connected to a split upper shell (3), a switch button (32) is slidably mounted in the split upper shell (3), a cleaning portion for cleaning the split upper shell (3) is provided in the split upper shell (3), and when the switch button (32) slides, the cleaning portion cleans the inside of the split upper shell (3); a quantitative component (34) fixedly connected to the decompression assembly (2), The switch button (32) is connected to a valve stem (39), the valve stem (39) is slidably mounted in a quantitative component (34), and a limiting portion for limiting the position of the valve stem (39) is provided in the quantitative component (34).

2. A gas pressure reducer according to claim 1, characterized in that: An air outlet hole (31) is provided on the split upper shell (3), an upper buckle (36) is fixedly connected to the switch button (32), and a lower buckle (37) is fixedly connected to the valve stem (39), and the upper buckle (36) is meshed with the lower buckle (37).

3. A gas pressure reducer according to claim 2, characterized in that: The output end of the valve stem (39) is fixedly connected to a valve core (311), the pressure reducing assembly (2) is fixedly connected to a split lower shell (33), the split lower shell (33) is fixedly connected to a sealing ring (310), and the valve core (311) cooperates with the sealing ring (310).

4. A gas pressure reducer according to claim 3, characterized in that: A compression spring (312) is fixedly connected to the valve core (311), a free end of the compression spring (312) is fixedly connected to the inside of a quantitative component (34), and a sealing gasket (35) is fixedly connected to the output end of the quantitative component (34).

5. A gas pressure reducer according to claim 4, characterized in that: The cleaning portion comprises a connecting rod (41) slidably mounted in the split upper shell (3); a pulling plate (44) is fixedly connected to the connecting rod (41); a rotating plate (43) is rotatably mounted on the pulling plate (44); a rotating gear (4) is rotatably mounted in the split upper shell (3); and the rotating plate (43) is rotatably mounted on the rotating gear (4). The rotating gear (4) is fixedly connected to a limit rod (42), the limit rod (42) is rotatably mounted in the split upper shell (3), the lower buckle (37) is fixedly connected to a movable tooth plate (38), the movable tooth plate (38) is meshed with the rotating gear (4), and the connecting rod (41) is fixedly connected to a brush plate (45), the brush plate (45) is attached to the inner wall of the split upper shell (3).

6. A gas pressure reducer according to claim 5, characterized in that: The split upper shell (3) is provided with a slide groove (313), an air bag is arranged in the slide groove (313), the connecting rod (41) is fixedly connected to the air bag, a slide plate (49) is slidably mounted on the brush plate (45), a lifting plate (410) is fixedly connected to the slide plate (49), a plurality of nozzles (411) are arranged on the lifting plate (410), and the output end of the air bag is connected to the nozzle (411).

7. A gas pressure reducer according to claim 6, characterized in that: The brush plate (45) is provided with a swing groove (46), a slide bar (47) is fixedly connected in the swing groove (46), the slide plate (49) is slidably mounted on the slide bar (47), a return spring (48) is fixedly connected to the slide plate (49), and the free end of the return spring (48) is fixedly connected to the swing groove (46). The lifting plate (410) is fixedly connected to a support rod (412), a ball bearing (413) is fixedly connected to the support rod (412), a connecting plate (14) is fixedly connected inside the split upper shell (3), a vibrating tooth plate (13) is fixedly connected to the connecting plate (14), and the vibrating tooth plate (13) cooperates with the ball bearing (413).

8. A gas pressure reducer according to claim 1, characterized in that: The limiting portion comprises a driving bevel gear (314) rotatably mounted on the quantitative component (34); a threaded rod (316) is rotatably mounted in the decompression assembly (2); a linkage bevel gear (315) is fixedly connected to the threaded rod (316); the linkage bevel gear (315) is meshedly mounted with the driving bevel gear (314); The threaded rod (316) is meshedly mounted with a matching rod (317), the matching rod (317) is fixedly connected with a butt joint (318), the butt joint (318) is matched with the valve stem (39), both sides of the butt joint (318) are fixedly connected with sliders (319), and the sliders (319) are slidably mounted in the pressure reducing assembly (2).

9. A gas pressure reducer according to claim 1, characterized in that: The pressure reducing assembly (2) is provided with a safety valve (23) and a quantitative hole (24), respectively; a touch rod (21) is slidably mounted in the pressure reducing assembly (2); a contact (22) is fixedly connected to the touch rod (21); and a pressure gauge (11) is fixedly connected to the switch assembly (12).

10. A gas pressure reducer according to claim 9, characterized in that: The touch rod (21) is fixedly connected to a self-compensating valve (25), the self-compensating valve (25) is fixedly connected to a self-compensating spring (27), the free end of the self-compensating spring (27) is fixedly connected to a piston assembly (26), the piston assembly (26) is fixedly connected in the decompression assembly (2), and the self-compensating valve (25) maintains a seal with the decompression assembly (2) in an initial state.

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