A non-electric variable gas pressure reducer

Abstract

The present invention relates to the technical field of gas pressure reducers, and in particular to a non-electric variable gas pressure reducer, comprising a pressure reducer body, an air intake pipe and a filter assembly, wherein the filter assembly comprises a semicircular socket, a semicircular slot and a filter screen, and enters the air intake pipe through the semicircular socket and is inserted into the semicircular slot so that the filter screen and the air intake pipe are arranged coaxially, a first cam is fixedly provided on both sides of the filter screen, an arc-shaped limit plate is fixedly provided on the outer wall of the filter screen, a drive block, one end of which is fixedly provided on the outer arc wall of the arc-shaped limit plate, a locking assembly is installed on the air intake pipe, two sealing assemblies are both arranged in the air intake pipe, and two linkage assemblies are both arranged in the air intake pipe, thereby realizing the convenience of installing and disassembling the filter screen, and solving the problem that the internal filter structure of the existing pressure reducer is single and the filter structure is not easy to replace and clean after being blocked after long-term use.

Description

Technical Field

[0001] The invention relates to the technical field of gas pressure reducers, and in particular to a non-electric variable type gas pressure reducer. Background Art

[0002] A pressure reducer is a device that reduces the high-pressure oxygen gas stored in an oxygen cylinder to the low-pressure oxygen required for gas welding. Since the pressure in the cylinder is relatively high, while the pressure required for gas welding, gas cutting and the point of use is relatively low, a pressure reducer is needed to reduce the higher-pressure gas stored in the cylinder to low-pressure gas, and it should be ensured that the required working pressure remains stable from beginning to end. In short, a pressure reducer is a regulating device that reduces high-pressure gas to low-pressure gas and keeps the pressure and flow of the output gas stable.

[0003] According to patent document CN201921639485.3, a pure gas pressure reducer is disclosed. Although a filtering structure is arranged inside the pressure reducer, the filtering structure is too simple and is not easy to replace and clean after being blocked after long-term use. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a non-electric variable gas pressure reducer to solve the problem that the existing pressure reducer has a single internal filter structure and is difficult to replace and clean after being blocked after long-term use.

[0005] Based on the above purpose, the present invention provides a non-electric variable gas pressure reducer, including a pressure reducer body, an air inlet of the pressure reducer body is connected to an air inlet pipe, a detachably connected filter assembly is provided on the air inlet pipe, and the filter assembly includes: A semicircular socket is arranged on the outer wall of the air inlet pipe; A semicircular slot, arranged inside the air intake pipe; The filter screen enters the air inlet pipe through the semicircular socket and is inserted into the semicircular slot so that the filter screen and the air inlet pipe are arranged coaxially, and first convex shafts in a symmetrical state are fixed on both sides of the filter screen, and each of the first convex shafts is arranged at a point near the outer edge of the filter screen; An arc-shaped limiting plate is fixedly mounted on the outer wall of the filter screen, and one end of the arc-shaped limiting plate is arranged to fit with one end of the semicircular socket through the rotation of the filter screen; A driving block, one end of which is fixed on the outer arc wall of the arc-shaped limiting plate; A locking assembly, mounted on the air intake pipe, the locking assembly cooperates with the driving block to fix the filter screen on the air intake pipe; Two sealing components are both arranged in the air intake pipe, and each of the sealing components is arranged on one side of the filter screen; Two linkage components are both arranged in the air intake pipe, one end of each linkage component is respectively connected to the first cam shaft in driving connection, and the other end is respectively connected to the sealing component in driving connection.

[0006] Preferably, the pressure reducer body comprises: A valve body, wherein an air inlet cavity and an air outlet cavity are provided inside the valve body, wherein the air inlet cavity is arranged at the bottom of the air outlet cavity, the air inlet cavity is communicated with the air outlet cavity, and the air inlet cavity and the air outlet cavity are communicated with the air inlet and the air outlet of the valve body respectively; A valve cover, fixedly mounted on the top of the valve body; A valve seat, one end of which is sealed with the top of the valve body, and the other end of which passes through the valve body and is sealed at the connection between the air inlet cavity and the air outlet cavity; A valve stem is inserted into the valve seat, a piston is fixedly arranged at the bottom of the valve stem, and a lower pad is threadedly connected to the top of the valve stem; A first spring, arranged inside the valve cover, one end of the first spring abutting against the lower pad; The pressure regulating assembly is arranged inside the valve cover, and the pressure regulating assembly abuts against the free end of the first spring.

[0007] Preferably, the voltage regulating assembly comprises: A first threaded rod is arranged inside the valve cover, one end of the first threaded rod passes through the top of the valve cover and is fixed with an adjusting head, and the first threaded rod is rotatably connected to the valve cover; An upper pad, sleeved on the first threaded rod, the upper pad being threadedly connected to the first threaded rod, and the upper pad abutting against an end of the first spring away from the lower pad; A waist-shaped through hole is arranged on the outer wall of the valve cover, a scale is arranged on the side of the waist-shaped through hole, a display rod is arranged inside the waist-shaped through hole, one end of the display rod is fixedly connected to the upper pad, and the other end is provided with a triangular arrow for indicating the scale.

[0008] Preferably, the locking assembly comprises: at least one second convex shaft, one end of which is disposed inside the driving block and the other end of which passes through a side of the driving block; at least one second spring, disposed inside the driving block, one end of the second spring abutting against the second convex shaft; At least one fixing block is fixed on the air inlet pipe, a locking hole is provided on the fixing block, and a notch for controlling the retraction of the second cam shaft is provided on one side of the fixing block; At least one unlocking component is fixed on a side of the fixing block away from the semicircular socket.

[0009] Preferably, the unlocking component comprises: A limit block, fixedly mounted on the air inlet pipe; A connecting rod is passed through the limiting block, a stop block is fixedly arranged at one end of the connecting rod, and a push block is fixedly arranged at the other end, and the push block is inserted into the locking hole.

[0010] Preferably, the sealing assembly comprises: A first annular groove is provided on one side of the semicircular socket and the semicircular slot; a rubber ring, arranged in the first annular groove, An annular mounting cavity is arranged in the wall of the air inlet pipe; The mounting ring is arranged in the annular mounting cavity. A plurality of guide rods are fixedly arranged on one side of the mounting ring. Each guide rod passes through the annular mounting cavity and the first annular groove and is fixedly connected to the rubber ring. The mounting ring is transmission-connected to the linkage assembly.

[0011] Preferably, second annular grooves adapted to the rubber ring are provided on both sides of the filter screen, and the depth of the second annular groove is smaller than the depth of the first annular groove.

[0012] Preferably, the linkage component comprises: An arc groove is arranged on one side of the semicircular socket and the semicircular slot, the arc groove is arranged close to the inner ring of the first annular groove, the arc groove is communicated with the annular mounting cavity, and a linkage through hole adapted to the first convex shaft is arranged on the inner arc of the arc groove; An arc-shaped slider is slidably connected and arranged in the arc-shaped groove, one end of the arc-shaped slider is arranged close to the linkage through hole, and the side of the arc-shaped slider away from the filter screen passes through the arc-shaped groove and is arranged in the annular mounting cavity; An elastic member is arranged in the arc groove, one end of the elastic member is fixedly connected to one end of the arc groove, and the other end is fixedly connected to one end of the arc slider away from the linkage through hole; An outer gear ring is sleeved in the annular mounting cavity, and one side of the outer gear ring is fixedly connected to the arc-shaped sliding block; A plurality of second threaded rods are evenly distributed and rotatably connected and arranged in the annular mounting cavity, each of the second threaded rods is penetrated through the mounting ring, and each of the second threaded rods is threadedly connected to the mounting ring; A plurality of gears are respectively sleeved on the second threaded rod, each of the gears is respectively fixedly connected to the second threaded rod, and each of the gears is meshed with the outer gear ring.

[0013] The beneficial effects of the present invention are as follows: the filter is inserted into the semicircular slot through the semicircular socket, the arc-shaped limit plate is driven to rotate by the driving block, the arc-shaped limit plate drives the filter to rotate, the filter drives the first cam to rotate, the first cam drives the linkage assembly to work, and the linkage assembly drives the sealing assembly to work to seal both sides of the filter until one end of the arc-shaped limit plate abuts against one end of the semicircular socket. At this time, the driving block and the locking assembly cooperate to complete the locking and fixing work, so that the filter is firmly fixed in the intake pipe, thereby realizing the convenience of installation and disassembly of the filter, and solving the problem that the internal filtering structure of the existing pressure reducer is single and the filtering structure is not easy to replace and clean after being blocked after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 Schematic diagram of the cross-sectional structure of the pressure reducer body according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the voltage regulating assembly according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the filter assembly according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the sealing component and the linkage component according to an embodiment of the present invention; Figure 6 Schematic diagram of the three-dimensional structure of the filter screen according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure inside the driving block according to an embodiment of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the air intake pipe at the semicircular socket according to an embodiment of the present invention; Fig. 9 It is a partial cross-sectional schematic diagram of an intake pipe according to an embodiment of the present invention.

[0016] The markings in the figure are: 1. Pressure reducer body; 2. Air inlet pipe; 3. Semicircular socket; 4. Semicircular slot; 5. Filter; 6. First cam; 7. Arc stop plate; 8. Drive block; 9. Valve body; 10. Air inlet cavity; 11. Air outlet cavity; 12. Valve cover; 13. Valve seat; 14. Valve stem; 15. Piston; 16. Lower pad; 17. First spring; 18. First threaded rod; 19. Adjusting head; 20. Upper pad; 21. Waist-shaped through hole; 22. Scale; 23. Display rod; 24. Triangular arrow head; 25, second cam; 26, second spring; 27, fixing block; 28, locking hole; 29, notch; 30, limit block; 31, connecting rod; 32, stop block; 33, push block; 34, first annular groove; 35, rubber ring; 36, annular mounting cavity; 37, mounting ring; 38, guide rod; 39, second annular groove; 40, arc groove; 41, linkage through hole; 42, arc slider; 43, elastic member; 44, outer gear ring; 45, second threaded rod; 46, gear. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0018] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] like Figures 1 to 9 As shown, a non-electric variable gas pressure reducer includes a pressure reducer body 1, an air inlet of the pressure reducer body 1 is connected to an air inlet pipe 2, and a detachably connected filter assembly is provided on the air inlet pipe 2, and the filter assembly includes: A semicircular socket 3 is arranged on the outer wall of the air inlet pipe 2; A semicircular slot 4 is arranged inside the air inlet pipe 2; The filter screen 5 enters the air inlet pipe 2 through the semicircular socket 3 and is inserted into the semicircular slot 4, so that the filter screen 5 and the air inlet pipe 2 are arranged coaxially, and both sides of the filter screen 5 are fixed with first convex shafts 6 in a symmetrical state, and each of the first convex shafts 6 is arranged at a place near the outer edge of the filter screen 5; The arc-shaped limiting plate 7 is fixedly mounted on the outer wall of the filter screen 5, and one end of the arc-shaped limiting plate 7 is rotated by the filter screen 5 to fit with one end of the semicircular socket 3; A driving block 8, one end of which is fixed on the outer arc wall of the arc-shaped limiting plate 7; A locking assembly, mounted on the air intake pipe 2, the locking assembly cooperates with the driving block 8 to fix the filter screen 5 on the air intake pipe 2; Two sealing components are both arranged in the air intake pipe 2, and each of the sealing components is arranged on one side of the filter screen 5; Two linkage components are both arranged in the intake pipe 2, and one end of each linkage component is respectively connected to the first cam shaft 6, and the other end is respectively connected to the sealing component.

[0020] For example, by inserting the filter 5 into the semicircular slot 4 through the semicircular socket 3, the driving block 8 drives the arc limit plate 7 to rotate, the arc limit plate 7 drives the filter 5 to rotate, the filter 5 drives the first cam 6 to rotate, the first cam 6 drives the linkage component to work, the linkage component drives the sealing component to work to seal both sides of the filter 5 until one end of the arc limit plate 7 is against one end of the semicircular socket 3. At this time, the driving block 8 cooperates with the locking component to complete the locking and fixing work, so that the filter 5 is firmly fixed in the intake pipe 2, thereby realizing the convenience of installation and disassembly of the filter 5, and solving the problem that the internal filtering structure of the existing pressure reducer is single and the filtering structure is not easy to replace and clean after being blocked after long-term use.

[0021] As an optional embodiment, the pressure reducer body 1 includes: The valve body 9 is provided with an air inlet cavity 10 and an air outlet cavity 11 inside thereof, wherein the air inlet cavity 10 is arranged at the bottom of the air outlet cavity 11, the air inlet cavity 10 is communicated with the air outlet cavity 11, and the air inlet cavity 10 and the air outlet cavity 11 are communicated with the air inlet and the air outlet of the valve body 9 respectively; A valve cover 12 is fixed on the top of the valve body 9; A valve seat 13, one end of which is sealed with the top of the valve body 9, and the other end of which passes through the valve body 9 and is sealed at the connection between the air inlet cavity 10 and the air outlet cavity 11; A valve stem 14 is inserted into the valve seat 13, a piston 15 is fixedly arranged at the bottom of the valve stem 14, and a lower pad 16 is threadedly connected to the top of the valve stem 14; A first spring 17 is disposed inside the valve cover 12, and one end of the first spring 17 abuts against the lower pad 16; The pressure regulating assembly is arranged inside the valve cover 12 , and the pressure regulating assembly abuts against the free end of the first spring 17 .

[0022] As an optional embodiment, the voltage regulating component includes: A first threaded rod 18 is disposed inside the valve cover 12, one end of the first threaded rod 18 passes through the top of the valve cover 12 and is fixed with an adjusting head 19, and the first threaded rod 18 is rotatably connected to the valve cover 12; An upper pad 20 is sleeved on the first threaded rod 18, the upper pad 20 is threadedly connected to the first threaded rod 18, and the upper pad 20 abuts against an end of the first spring 17 away from the lower pad 16; A waist-shaped through hole 21 is arranged on the outer wall of the valve cover 12, and a scale 22 is arranged on the side of the waist-shaped through hole 21. A display rod 23 is arranged inside the waist-shaped through hole 21. One end of the display rod 23 is fixedly connected to the upper pad 20, and the other end is provided with a triangular arrow 24 for indicating the scale 22.

[0023] For example, by controlling the adjusting head 19 to drive the first threaded rod 18 to rotate, the first threaded rod 18 drives the upper pad 20 to move up and down, so as to cooperate with the lower pad 16 to adjust the elastic force of the first spring 17, thereby adjusting the air pressure intensity. By setting the display rod 23, the scale 22 and the triangular arrow 24, it is convenient for the user to accurately control the air pressure intensity.

[0024] As an optional embodiment, the locking assembly includes: at least one second protruding shaft 25, one end of which is disposed inside the driving block 8 and the other end of which passes through a side of the driving block 8; At least one second spring 26 is disposed inside the driving block 8, and one end of the second spring 26 abuts against the second convex shaft 25; At least one fixing block 27 is fixed on the air intake pipe 2, a locking hole 28 is provided on the fixing block 27, and a notch 29 for controlling the retraction of the second cam shaft 25 is provided on one side of the fixing block 27; At least one unlocking component is fixed on a side of the fixing block 27 away from the semicircular socket 3 .

[0025] Preferably, the unlocking component comprises: A limit block 30 is fixed on the air inlet pipe 2; A connecting rod 31 is passed through the limiting block 30 . A stopper 32 is fixedly disposed at one end of the connecting rod 31 , and a push block 33 is fixedly disposed at the other end. The push block 33 is inserted into the locking hole 28 .

[0026] For example, when the driving block 8 rotates to the fixed block 27, the second cam 25 is retracted into the interior of the driving block 8 through the notch 29 until the second cam 25 is coaxial with the locking hole 28. The second cam 25 pushes the push block 33 to move under the action of the second spring 26. The push block 33 drives one end of the connecting rod 31, and the connecting rod 31 drives one end of the stop block 32, so that the second cam 25 enters the locking hole 28 and cooperates with the locking hole 28 to lock the driving block 8. When the filter 5 needs to be replaced, the connecting rod 31 is driven to move by pressing the stop block 32, and the connecting rod 31 drives the push block 33 to move. The push block 33 drives the second cam 25 to squeeze the second spring 26 and retract into the driving block 8, thereby restoring the driving block 8 to a freely rotatable state.

[0027] As an optional embodiment, the sealing assembly includes: A first annular groove 34 is provided on one side of the semicircular socket 3 and the semicircular slot 4; The rubber ring 35 is arranged in the first annular groove 34. An annular mounting cavity 36 is arranged in the wall of the air inlet pipe 2; The mounting ring 37 is arranged in the annular mounting cavity 36. A plurality of guide rods 38 are fixedly provided on one side of the mounting ring 37. Each of the guide rods 38 passes through the annular mounting cavity 36 and the first annular groove 34 and is fixedly connected to the rubber ring 35. The mounting ring 37 is transmission-connected to the linkage assembly.

[0028] For example, the linkage assembly drives the mounting ring 37 to move, the mounting ring 37 drives the guide rod 38 to move, and the guide rod 38 drives the rubber ring 35 to move, so that the rubber ring 35 is pressed tightly against the filter screen 5, thereby completing the sealing work.

[0029] As an optional embodiment, second annular grooves 39 adapted to the rubber ring 35 are provided on both sides of the filter screen 5 , and the depth of the second annular groove 39 is smaller than the depth of the first annular groove 34 .

[0030] For example, by providing a second annular groove 39 on the filter 5, the rubber ring 35 enters the second annular groove 39 to press the filter 5, which is used to guide the position of the filter 5 in the intake pipe 2 on the one hand, and to improve the sealing between the rubber ring 35 and the filter 5 on the other hand.

[0031] As an optional embodiment, the linkage component includes: An arc groove 40 is arranged on one side of the semicircular socket 3 and the semicircular insertion slot 4, the arc groove 40 is arranged close to the inner ring of the first annular groove 34, the arc groove 40 is communicated with the annular mounting cavity 36, and a linkage through hole 41 adapted to the first convex shaft 6 is arranged on the inner arc of the arc groove 40; An arc-shaped slider 42 is slidably connected and arranged in the arc-shaped groove 40, one end of the arc-shaped slider 42 is arranged close to the linkage through hole 41, and the side of the arc-shaped slider 42 away from the filter screen 5 passes through the arc-shaped groove 40 and is arranged in the annular mounting cavity 36; An elastic member 43 is disposed in the arc groove 40, one end of the elastic member 43 is fixedly connected to one end of the arc groove 40, and the other end is fixedly connected to one end of the arc slider 42 away from the linkage through hole 41; An outer gear ring 44 is sleeved in the annular mounting cavity 36, and one side of the outer gear ring 44 is fixedly connected to the arc-shaped slider 42; A plurality of second threaded rods 45 are evenly distributed and rotatably connected and arranged in the annular mounting cavity 36, each of the second threaded rods 45 is penetrated through the mounting ring 37, and each of the second threaded rods 45 is threadedly connected to the mounting ring 37; A plurality of gears 46 are respectively sleeved on the second threaded rod 45 , each of the gears 46 is respectively fixedly connected to the second threaded rod 45 , and each of the gears 46 is meshed with the outer gear ring 44 .

[0032] For example, after the filter 5 enters the intake pipe 2, the first cam 6 enters the arc groove 40 through the linkage through hole 41. When the filter 5 rotates, the first cam 6 drives the arc slider 42 to rotate, the arc slider 42 drives the outer gear ring 44 to rotate, the outer gear ring 44 drives the gear 46 to rotate, the gear 46 drives the second threaded rod 45 to rotate, and the second threaded rod 45 drives the mounting ring 37 to move through the thread, so that the rubber ring 35 completes the sealing work. By arranging an elastic member 43 in the arc groove 40, after the drive block 8 is unlocked, the elastic member 43 drives the arc slider 42 to reset, so that the drive block 8 is automatically disengaged from the fixed block 27 without manual operation, thereby improving the efficiency of disassembly of the filter 5.

[0033] Those skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A non-electric variable gas pressure reducer, comprising a pressure reducer body (1), an air inlet of the pressure reducer body (1) being connected to an air inlet pipe (2), and a detachably connected filter assembly being provided on the air inlet pipe (2), characterized in that: The filter assembly comprises: A semicircular socket (3) is arranged on the outer wall of the air inlet pipe (2); A semicircular slot (4) arranged inside the air intake pipe (2); The filter screen (5) enters the air inlet pipe (2) through the semicircular socket (3) and is inserted into the semicircular slot (4) so ​​that the filter screen (5) and the air inlet pipe (2) are arranged coaxially, and first convex shafts (6) in a symmetrical state are fixed on both sides of the filter screen (5), and each of the first convex shafts (6) is arranged at a point close to the outer edge of the filter screen (5); An arc-shaped limit plate (7) is fixedly mounted on the outer wall of the filter screen (5), and one end of the arc-shaped limit plate (7) is rotated through the filter screen (5) to fit with one end of the semicircular socket (3); A driving block (8), one end of which is fixedly mounted on the outer arc wall of the arc-shaped limiting plate (7); a locking assembly mounted on the air intake pipe (2), the locking assembly cooperating with the driving block (8) to fix the filter screen (5) on the air intake pipe (2); Two sealing assemblies, both arranged in the air intake pipe (2), each of the sealing assemblies being arranged on one side of the filter screen (5); Two linkage components are both arranged in the air intake pipe (2), one end of each linkage component is respectively transmission-connected to the first cam shaft (6), and the other end is respectively transmission-connected to the sealing component.

2. A non-electric variable gas pressure reducer according to claim 1, characterized in that: The pressure reducer body (1) comprises: A valve body (9), wherein an air inlet cavity (10) and an air outlet cavity (11) are provided inside the valve body, wherein the air inlet cavity (10) is arranged at the bottom of the air outlet cavity (11), the air inlet cavity (10) is communicated with the air outlet cavity (11), and the air inlet cavity (10) and the air outlet cavity (11) are respectively communicated with the air inlet and the air outlet of the valve body (9); A valve cover (12) is fixedly mounted on the top of the valve body (9); A valve seat (13), one end of which is sealed with the top of the valve body (9), and the other end of which passes through the valve body (9) and is sealed with the connection between the air inlet cavity (10) and the air outlet cavity (11); A valve stem (14) is inserted into the valve seat (13), a piston (15) is fixedly provided at the bottom of the valve stem (14), and a lower cushion block (16) is threadedly connected to the top of the valve stem (14); A first spring (17) is arranged inside the valve cover (12), one end of the first spring (17) being in contact with the lower pad (16); A pressure regulating assembly is arranged inside the valve cover (12), and the pressure regulating assembly abuts against the free end of the first spring (17).

3. A non-electric variable gas pressure reducer according to claim 2, characterized in that: The voltage regulating assembly comprises: a first threaded rod (18) disposed inside the valve cover (12), one end of the first threaded rod (18) passing through the top of the valve cover (12) and fixedly provided with an adjusting head (19), and the first threaded rod (18) is rotatably connected to the valve cover (12); an upper pad (20) sleeved on the first threaded rod (18), the upper pad (20) being threadedly connected to the first threaded rod (18), and the upper pad (20) abutting against an end of the first spring (17) away from the lower pad (16); A waist-shaped through hole (21) is provided on the outer wall of the valve cover (12), a scale (22) is provided on the side of the waist-shaped through hole (21), a display rod (23) is provided inside the waist-shaped through hole (21), one end of the display rod (23) is fixedly connected to the upper pad (20), and the other end is provided with a triangular arrow (24) for indicating the scale (22).

4. A non-electric variable gas pressure reducer according to claim 1, characterized in that: The locking assembly comprises: at least one second convex shaft (25), one end of which is arranged inside the driving block (8) and the other end of which passes through a side of the driving block (8); at least one second spring (26) disposed inside the driving block (8), one end of the second spring (26) abutting against the second convex shaft (25); At least one fixing block (27) fixedly mounted on the air intake pipe (2), the fixing block (27) being provided with a locking hole (28), and one side of the fixing block (27) being provided with a notch (29) for controlling the retraction of the second cam shaft (25); At least one unlocking component is fixedly arranged on a side of the fixing block (27) away from the semicircular socket (3).

5. A non-electric variable gas pressure reducer according to claim 4, characterized in that: The unlocking component comprises: A limit block (30) fixedly mounted on the air intake pipe (2); A connecting rod (31) is inserted through the limiting block (30), a stopper (32) is fixedly provided at one end of the connecting rod (31), and a push block (33) is fixedly provided at the other end, and the push block (33) is inserted into the locking hole (28).

6. A non-electric variable gas pressure reducer according to claim 1, characterized in that: The sealing assembly comprises: A first annular groove (34) is arranged on one side of the semicircular socket (3) and the semicircular slot (4); A rubber ring (35) is arranged in the first annular groove (34). An annular mounting cavity (36) is arranged in the wall of the air inlet pipe (2); A mounting ring (37) is arranged in the annular mounting cavity (36), and a plurality of guide rods (38) are fixedly arranged on one side of the mounting ring (37), each of the guide rods (38) passes through the annular mounting cavity (36) and the first annular groove (34) and is fixedly connected to the rubber ring (35), and the mounting ring (37) is drivingly connected to the linkage assembly.

7. A non-electric variable gas pressure reducer according to claim 6, characterized in that: Second annular grooves (39) adapted to the rubber ring (35) are provided on both sides of the filter screen (5), and the depth of the second annular groove (39) is smaller than the depth of the first annular groove (34).

8. A non-electric variable gas pressure reducer according to claim 6, characterized in that: The linkage components include: an arc-shaped groove (40) disposed on one side of the semicircular socket (3) and the semicircular insertion slot (4), the arc-shaped groove (40) being disposed close to the inner ring of the first annular groove (34), the arc-shaped groove (40) being communicated with the annular mounting cavity (36), and a linkage through hole (41) adapted to the first convex shaft (6) being disposed on the inner arc of the arc-shaped groove (40); an arc-shaped slider (42) slidably connected and arranged in the arc-shaped groove (40), one end of the arc-shaped slider (42) being arranged close to the linkage through hole (41), and a side of the arc-shaped slider (42) away from the filter screen (5) passing through the arc-shaped groove (40) and arranged in the annular mounting cavity (36); An elastic member (43) is arranged in the arc-shaped groove (40), one end of the elastic member (43) is fixedly connected to one end of the arc-shaped groove (40), and the other end is fixedly connected to one end of the arc-shaped sliding block (42) away from the linkage through hole (41); An outer toothed ring (44) is sleeved in the annular mounting cavity (36), and one side of the outer toothed ring (44) is fixedly connected to the arc-shaped sliding block (42); a plurality of second threaded rods (45) evenly distributed and rotatably connected and arranged in the annular mounting cavity (36), each of the second threaded rods (45) being inserted through the mounting ring (37), and each of the second threaded rods (45) being threadedly connected to the mounting ring (37); A plurality of gears (46) are respectively sleeved on the second threaded rod (45); each of the gears (46) is respectively fixedly connected to the second threaded rod (45), and each of the gears (46) is meshed with the outer gear ring (44).

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