A pneumatic multi-stage pressure-reducing valve core assembly with adjustable extractable low-temperature regulating valve

Abstract

The present invention relates to the field of pneumatic regulating valves, and discloses an adjustable extractable low-temperature regulating valve with a pneumatic multi-stage pressure-reducing valve core assembly, comprising: a multi-stage regulating component, a material valve body, a filtering component and a protective component, wherein the top of the filtering component is fixedly connected to the bottom center of the multi-stage regulating component, the top of the protective component is fixedly connected to the bottom end of the filtering component, and the top of the material valve body is fixedly connected to the bottom end of the protective component; the multi-stage regulating component comprises an air control head and a limiting sleeve rod frame, and the air control head is fixedly installed at the inner top center of the limiting sleeve rod frame. The present invention can facilitate the extraction and replacement of worn pneumatic valve stems and perform multi-stage flow control inside the material valve body through the coordinated operation among the multi-stage regulating component, the material valve body, the filtering component and the protective component.

Description

Technical Field

[0001] The invention relates to the field of pneumatic regulating valves, and in particular to an adjustable extractable low-temperature regulating valve with a pneumatic multi-stage pressure-reducing valve core component. Background Art

[0002] Pneumatic low temperature regulating valve is a valve used to control fluid flow and pressure under low temperature conditions. It uses a pneumatic actuator as a control device, and controls the valve opening by adjusting the working state of the actuator, thereby achieving the regulation of fluid flow and pressure.

[0003] Among them, when the pneumatic low-temperature regulating valve is in operation, the control signal is processed by the pneumatic regulator and the processed signal is transmitted to the pneumatic actuator. After receiving the control signal, the pneumatic actuator realizes the opening and closing control of the valve by changing the gas supply pressure or releasing the gas. When the gas supply pressure increases, the force on the diaphragm increases, pushing the valve to move in the opening direction; when the gas supply pressure decreases or the gas is released, the force on the diaphragm decreases, and the valve moves in the closing direction.

[0004] During use, the existing pneumatic low-temperature regulating valve needs to repeatedly control the lifting and lowering of the valve stem to control the flow inside the valve body. This will cause the bottom end of the valve stem to frequently contact the inner surface of the valve body, which will cause wear to the outer surface of the bottom end of the valve stem, making it impossible to accurately control the flow inside the valve body. At the same time, when replacing the valve stem, the entire regulating valve needs to be replaced, which is not convenient for replacing the valve stem alone. Moreover, during use of the existing valve body, a single hole is set inside for direct diversion, and the flow of the flowing object cannot be controlled at multiple levels, so it cannot meet people's use needs. Summary of the invention

[0005] The purpose of the present invention is to provide a pneumatic multi-stage pressure-reducing valve core assembly with an adjustable extractable low-temperature regulating valve to solve the following technical problems: how to facilitate the extraction and replacement of a worn valve stem, and how to perform multi-stage flow control inside the valve body.

[0006] The object of the present invention can be achieved by the following technical scheme: A pneumatic multi-stage pressure-reducing valve core assembly adjustable extractable low-temperature regulating valve, comprising: a multi-stage regulating component, a material valve body, a filter component and a protective component, the top of the filter component is fixedly connected to the bottom center of the multi-stage regulating component, the top of the protective component is fixedly connected to the bottom end of the filter component, and the top of the material valve body is fixedly connected to the bottom end of the protective component;

[0007] The multi-stage adjustment component includes an air control head and a limit sleeve rod frame, wherein the air control head is fixedly mounted at the inner top center of the limit sleeve rod frame, and limit posts are slidably inserted inside both sides of the bottom end of the limit sleeve rod frame, and a pneumatic valve stem is fixedly connected to the bottom center of the air control head, and multi-stage display columns are arranged on both sides of the inner bottom center of the limit sleeve rod frame, and an indicator column is fixedly mounted on the upper outer surface of the pneumatic valve stem;

[0008] The outer surface of the limit column is uniformly provided with tooth-shaped grooves, and both sides of the inner bottom end of the limit sleeve rod frame are slidably connected with plug-in plates, one end of the plug-in plate is fixedly connected with a reset handle, and the outer surface of one side end of the reset handle is uniformly fixedly connected with a first reset spring;

[0009] A water inlet is arranged at the center of the bottom surface of the material valve body, a water outlet is arranged on the middle outer surface of the material valve body, multiple levels of drainage holes are evenly arranged inside the material valve body, and an overflow hole is arranged at the center of the interior of the material valve body.

[0010] As a preferred solution of the present invention: the filter component includes a filter tube, a winding shaft, a limit frame and a transmission gear, the limit frame is symmetrically fixedly arranged on the upper outer surface of the filter tube, the transmission gear is rotatably clamped at the bottom of one end of the limit frame, and the winding shaft is welded to the center of the two side surfaces of the transmission gear;

[0011] The outer surface of the winding shaft is wound with a traction rope, the bottom end of the traction rope is fixedly connected with an arc-shaped sealing block, the inner surface of the arc-shaped sealing block is evenly provided with sealing rings, and the outer surface of the arc-shaped sealing block is symmetrically fixedly connected with a second reset spring.

[0012] As a preferred embodiment of the present invention: the protective component includes a limiting extension tube and a protective tube sleeve, the protective tube sleeve is symmetrically welded on the outer surface of the limiting extension tube, a plug-in hole is opened at the top center of the limiting extension tube, an expansion water stop ring is arranged on the outer surface of the bottom end of the limiting extension tube and inside the protective tube sleeve, an expansion water stop ring is symmetrically fixedly connected to the outer surface of the expansion water stop ring, an expansion water stop strip is fixedly connected to the top of the expansion water stop strip with a transmission rack, power supply interfaces are arranged at both ends of the top of the limiting extension tube, a sealing cavity is opened at the inner top of the limiting extension tube, and limiting holes are symmetrically opened at the edges of both ends of the top of the limiting extension tube.

[0013] As a preferred solution of the present invention: one end of the first return spring is fixedly connected to the outer surface of the limit sleeve rod frame, the plug-in plate passes through the outer surface of the limit sleeve rod frame and is clamped with the toothed groove, and the pneumatic valve stem is movably aligned with the multi-stage display column through the indicator column on the outer surface.

[0014] As a preferred solution of the present invention: the top of the material valve body is aligned with the plug-in hole at the bottom center of the limiting extension tube, the pneumatic valve stem passes through the inner center of the filter tube and is slidably plugged into the plug-in hole, and the inside of the filter tube is evenly installed with fillers.

[0015] As a preferred solution of the present invention: the bottom end of the pneumatic valve stem passes through the plug-in hole and is plugged into the top inner center of the material valve body, the expansion water stop strip is meshed and connected with the transmission gear through the transmission rack, and the arc-shaped sealing block is in active contact with the outer surface of the pneumatic valve stem through the sealing ring.

[0016] As a preferred solution of the present invention: the arc-shaped sealing block is movably connected to the inner top end of the limiting extension tube through the sealing cavity, one end of the second return spring is fixedly connected to the inner surface of the sealing cavity, and the traction rope is slidably connected to the sealing cavity through the limiting hole.

[0017] As a preferred embodiment of the present invention: a heating wire is arranged inside the expansion water stop strip and the expansion water stop ring, the bottom end of the power interface is fixedly connected to the heating wire, and an alarm is arranged at the bottom center edge of the multi-stage adjustment component and directly above the transmission rack.

[0018] Beneficial effects of the present invention:

[0019] (1) The present invention provides a limit column and a plug-in plate inside the multi-stage adjustment component, which can facilitate the support of the disassembled multi-stage adjustment component and ensure the stability of the pneumatic valve stem, thereby facilitating the replacement of the pneumatic valve stem by the staff. In addition, multi-stage drainage holes are provided inside the material valve body, which can perform multi-stage flow control on the flowing material.

[0020] (2) The present invention provides a filter component between the multi-stage adjustment component and the protection component, so that the arc-shaped sealing block inside the filter component can play a protective insurance role against leakage in the pneumatic valve, thereby reducing the further expansion of the leakage accident. At the same time, when the transmission rack rises, the alarm can be triggered to notify the staff to perform emergency maintenance. In addition, the expansion water stop ring inside the limit extension pipe can play a preliminary blocking role and delay the leakage of the liquid upstream.

[0021] (3) The present invention can facilitate the extraction and replacement of worn pneumatic valve stems and perform multi-stage flow control inside the material valve body through the coordinated operation of the multi-stage adjustment component, the material valve body, the filter component and the protective component. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure of the low temperature regulating valve for starting;

[0024] Figure 2 It is a schematic diagram of the structure of a multi-stage adjustment component;

[0025] Figure 3 for Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0026] Figure 4 It is a schematic diagram of the valve body structure;

[0027] Figure 5 It is a schematic diagram of the structure of the filter component;

[0028] Figure 6 This is a schematic diagram of the cutaway structure of the protective component.

[0029] Description of the drawings: 1. Multi-stage adjustment component; 2. Material valve body; 3. Filter component; 4. Protective component; 11. Air control head; 12. Limit sleeve rod frame; 13. Multi-stage display column; 14. Limit column; 15. Indicator column; 16. Pneumatic valve stem; 17. Reset handle; 18. First reset spring; 19. Plug-in board; 110. Toothed groove; 21. Water outlet; 22. Water inlet; 23. Overflow hole; 24. Multi-level drainage holes; 31. filter tube; 32. reel; 33. traction rope; 34. sealing ring; 35. arc-shaped sealing block; 36. second return spring; 37. transmission gear; 38. limit frame; 41. transmission rack; 42. sealing chamber; 43. expansion water stop strip; 44. expansion water stop ring; 45. limit extension tube; 46. plug-in hole; 47. limit hole; 48. power interface; 49. protective pipe sleeve. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 6 As shown, the present invention is an adjustable extractable low-temperature regulating valve of a pneumatic multi-stage pressure-reducing valve core assembly, comprising: a multi-stage regulating component 1, a material valve body 2, a filter component 3 and a protective component 4, the top of the filter component 3 is fixedly connected to the bottom center of the multi-stage regulating component 1, the top of the protective component 4 is fixedly connected to the bottom end of the filter component 3, and the top of the material valve body 2 is fixedly connected to the bottom end of the protective component 4;

[0032] The multi-stage adjustment component 1 includes an air control head 11 and a limit sleeve rod frame 12. The air control head 11 is fixedly installed at the top center of the limit sleeve rod frame 12. The limit sleeve rod frame 12 has both sides of the bottom end thereof slidably inserted with limit columns 14. The bottom center of the air control head 11 is fixedly connected with a pneumatic valve stem 16. Both sides of the bottom center of the limit sleeve rod frame 12 are provided with multi-stage display columns 13. The upper outer surface of the pneumatic valve stem 16 is fixedly installed with an indicator column 15.

[0033] The outer surface of the limit column 14 is uniformly provided with tooth-shaped grooves 110, and both sides of the inner bottom end of the limit sleeve rod frame 12 are slidably connected with plug-in plates 19, one end of the plug-in plate 19 is fixedly connected with a reset handle 17, and the outer surface of one side end of the reset handle 17 is uniformly fixedly connected with a first reset spring 18;

[0034] A water inlet 22 is provided at the center of the bottom surface of the material valve body 2 , a water outlet 21 is provided on the middle outer surface of the material valve body 2 , multi-level drainage holes 24 are evenly provided inside the material valve body 2 , and an overflow hole 23 is provided at the center of the interior of the material valve body 2 .

[0035] The filter component 3 includes a filter tube 31, a winding shaft 32, a limit frame 38 and a transmission gear 37. The limit frame 38 is symmetrically fixed on the upper outer surface of the filter tube 31. The transmission gear 37 is rotatably clamped at the bottom of one end of the limit frame 38. The winding shaft 32 is welded to the center of the two side surfaces of the transmission gear 37.

[0036] A traction rope 33 is wound on the outer surface of the winding shaft 32, and an arc-shaped sealing block 35 is fixedly connected to the bottom end of the traction rope 33. Sealing rings 34 are evenly arranged on the inner surface of the arc-shaped sealing block 35, and a second return spring 36 is symmetrically fixedly connected to the outer surface of the arc-shaped sealing block 35.

[0037] The protective component 4 includes a limiting extension tube 45 and a protective tube sleeve 49. The protective tube sleeve 49 is symmetrically welded on the outer surface of the limiting extension tube 45. A plug hole 46 is opened at the top center of the limiting extension tube 45. An expansion water stop ring 44 is arranged on the outer surface of the bottom end of the limiting extension tube 45 and inside the protective tube sleeve 49. An expansion water stop ring 44 is symmetrically fixedly connected to the outer surface of the expansion water stop ring 44. The top of the expansion water stop strip 43 is fixedly connected to the transmission rack 41. Both ends of the top of the limiting extension tube 45 are provided with power supply interfaces 48. A sealing cavity 42 is opened at the inner top of the limiting extension tube 45. Limiting holes 47 are symmetrically opened on the edges of both ends of the top of the limiting extension tube 45.

[0038] One end of the first return spring 18 is fixedly connected to the outer surface of the limiting sleeve rod frame 12, the plug-in plate 19 passes through the outer surface of the limiting sleeve rod frame 12 and is engaged with the toothed groove 110, and the pneumatic valve stem 16 is movably aligned with the multi-stage display column 13 through the indicator column 15 on the outer surface.

[0039] Through the above technical scheme, one end of the first return spring 18 can be fixedly connected to the outer surface of the limit sleeve rod frame 12, which can ensure that the first return spring 18 can reset the return handle 17. The plug-in plate 19 passes through the outer surface of the limit sleeve rod frame 12 and is engaged with the toothed groove 110, which can play a positioning role for the multi-stage adjustment component 1 after lifting and lowering. The pneumatic valve stem 16 is aligned with the multi-stage display column 13 through the indicator column 15 on the outer surface, which can play a feedback role, making it easy for the staff to know how many levels of flow the material valve body 2 can open.

[0040] The top of the material valve body 2 is aligned with the insertion hole 46 at the bottom center of the limit extension tube 45, and the pneumatic valve stem 16 penetrates the inner center of the filter tube 31 and is slidably inserted into the insertion hole 46. The inside of the filter tube 31 is evenly installed with fillers.

[0041] Through the above technical scheme, the top of the material valve body 2 can be aligned with the plug-in hole 46 at the bottom center of the limiting extension tube 45, which facilitates the alignment and connection between the material valve body 2 and the protective component 4. The pneumatic valve stem 16 passes through the inner center of the filter tube 31 and is slidably plugged into the plug-in hole 46, thereby isolating and protecting the outer surface of the pneumatic valve stem 16. The filler is evenly installed inside the filter tube 31, which can filter external impurities.

[0042] The bottom end of the pneumatic valve stem 16 passes through the plug hole 46 and is plugged into the top inner center of the material valve body 2. The expansion water stop strip 43 is meshed and connected with the transmission gear 37 through the transmission rack 41. The arc-shaped sealing block 35 is in active contact with the outer surface of the pneumatic valve stem 16 through the sealing ring 34.

[0043] Through the above technical scheme, the bottom end of the pneumatic valve stem 16 can pass through the plug hole 46 and be plugged into the top inner center of the material valve body 2, so that the flow of the internal circulation of the material valve body 2 can be controlled, and the expansion water stop strip 43 is meshed and connected with the transmission gear 37 through the transmission rack 41, so that when the transmission rack 41 is raised or lowered, it can drive the transmission gear 37 to rotate forward and reverse, and the arc-shaped sealing block 35 is in active contact with the outer surface of the pneumatic valve stem 16 through the sealing ring 34, which can seal the outer surface of the pneumatic valve stem 16, thereby blocking the liquid flowing through.

[0044] The arc-shaped sealing block 35 is movably connected to the inner top of the limiting extension tube 45 through the sealing cavity 42, one end of the second return spring 36 is fixedly connected to the inner surface of the sealing cavity 42, and the traction rope 33 is slidably connected to the sealing cavity 42 through the limiting hole 47.

[0045] Through the above technical scheme, the arc-shaped sealing block 35 can be movably connected to the inner top end of the limiting extension tube 45 through the sealing cavity 42, so that the sliding of the arc-shaped sealing block 35 can be limited, and at the same time, the rising liquid can be blocked and protected, thereby reducing the continued expansion of the impact of the accident. One end of the second return spring 36 is fixedly connected to the inner surface of the sealing cavity 42, and when the transmission gear 37 is reset and rotated, the second return spring 36 can pull the arc-shaped sealing block 35 to reset and slide, so that the two groups of arc-shaped sealing blocks 35 are separated and reset from each other, and the traction rope 33 is slidably and interlacedly connected with the sealing cavity 42 through the limiting hole 47, thereby limiting the sliding of the traction rope 33.

[0046] A heating wire is arranged inside the expansion water stop strip 43 and the expansion water stop ring 44 , the bottom end of the power supply interface 48 is fixedly connected to the heating wire, and an alarm is arranged at the bottom center edge of the multi-stage adjustment component 1 and directly above the transmission rack 41 .

[0047] Through the above technical scheme, a heating wire can be arranged inside the expansion water stop strip 43 and the expansion water stop ring 44, and the bottom end of the power interface 48 is fixedly connected to the heating wire. The heating wire is energized to dry the moisture inside the expansion water stop strip 43 and the expansion water stop ring 44, so that the expansion water stop strip 43 and the expansion water stop ring 44 will be dehydrated and shrink and reset for the next use. An alarm is arranged at the bottom center edge of the multi-stage adjustment component 1 and directly above the transmission rack 41, which can make the transmission rack 41 rise and squeeze the alarm to notify the staff of maintenance.

[0048] The working principle of the present invention is as follows: when using a pneumatic low-temperature regulating valve, a control signal is first given to allow the existing pneumatic regulator to process the signal, and the processed signal is transmitted to the existing pneumatic actuator. After receiving the control signal, the pneumatic actuator controls the opening and closing of the valve by changing the air supply pressure of the air source. When the air supply pressure of the air source increases, the force on the diaphragm inside the air control head 11 increases, so that the diaphragm drives the pneumatic valve stem 16 at the bottom to rise, so that the inside of the material valve body 2 can flow normally; when the air supply pressure of the air source decreases, the force on the diaphragm inside the air control head 11 decreases, so that the diaphragm drives the pneumatic valve stem 16 at the bottom to descend and block the inside of the material valve body 2. When the pneumatic valve stem 16 rises, it will drive the indicator column 15 on the upper outer surface to rise synchronously. When the indicator column 15 passes through the three groups of multi-stage display columns 13 in sequence during the rising process, it indicates that the flow inside the material valve body 2 is opened step by step, increasing the flow inside the material valve body 2. Therefore, three groups of multi-stage display columns 13 are provided to intuitively provide the staff with feedback on the flow levels opened inside the material valve body 2, so as to facilitate the staff to make corresponding readjustments. Moreover, when the bottom end of the pneumatic valve stem 16 is worn after being lifted and lowered for a long time, the pneumatic valve stem 16 needs to be replaced. When replacing the pneumatic valve stem 16, first shut down the pipeline operation, cut off the power to the regulating valve, and then remove the fastening screws between the multi-stage regulating component 1 and the filtering component 3, and then pull the multi-stage regulating component 1 up as a whole, so that the limit sleeve rod frame 12 rises synchronously on the outer surface of the limit column 14, and When the limiting sleeve rod frame 12 rises, the plug-in plate 19 will be continuously squeezed, retracted and slid. When the multi-stage adjustment component 1 drives the pneumatic valve stem 16 at the bottom to completely separate from the inside of the filter component 3 and the protective component 4, stop pulling the multi-stage adjustment component 1 to rise, and then remove the screws connecting the pneumatic valve stem 16 and the air control head 11, and then install the new pneumatic valve stem 16 at the bottom center of the air control head 11 to complete the replacement, and then pull the reset handles 17 on both sides to drive the plug-in plate 19 to slide close to each other, so that one end of the plug-in plate 19 is separated from the toothed groove 110 on the outer surface of the limiting column 14, and then support the multi-stage adjustment component 1 to slowly descend and align with the top of the filter component 3, and then use the fastening screws to tighten the multi-stage adjustment component 1 and the filter component 3. It is sufficient to make a fastening connection, so when the pneumatic valve stem 16 is replaced, the position of the multi-stage regulating component 1 after rising can be positioned through the plug-in plate 19, so as to facilitate the replacement of the drawn pneumatic valve stem 16 and avoid the complete removal of the multi-stage regulating component 1, thereby improving the efficiency of the replacement of the pneumatic valve stem 16. Moreover, the pneumatic low-temperature regulating valve will be worn during long-term use, so that the liquid in the conveying pipe will flow upstream through the material valve body 2. When the liquid enters the interior of the limit extension tube 45, it will be absorbed by the protective component 4, and the expansion water stop ring 44 will expand and closely contact the outer surface of the pneumatic valve stem 16 in the plug-in hole 46, thereby blocking the upstream liquid. If the rising water volume is large and continues to rise through the expansion water stop ring 44,The expansion water stop ring 44 will transfer the absorbed moisture to the expansion water stop strip 43, and the expansion water stop strip 43 will also expand upward, driving the top transmission rack 41 to rise and contact with the transmission gear 37. Therefore, as the transmission rack 41 rises, it will drive the transmission gear 37 to rotate. At the same time, the transmission gear 37 will reel in the traction rope 33 through the reel-up shaft 32, so that the traction rope 33 will pull the two groups of arc-shaped sealing blocks 35 closer to each other inside the sealing chamber 42. At the same time, the arc-shaped sealing block 35 will drive the sealing ring 34 on the inner surface to squeeze the outer surface of the pneumatic valve stem 16, thereby blocking the rising liquid and preventing the liquid from continuing to rise and expanding the liquid overflow. At the same time, the top of the transmission rack 41 will squeeze the alarm button at the bottom of the multi-stage adjustment component 1 to notify the staff to perform emergency repairs on the fault. After the leakage is repaired, the power supply interface 48 can be connected to the power supply so that the heating wire can dry the inside of the expansion water stop strip 43 and the expansion water stop ring 44, and at the same time, the expansion water stop strip 43 and the expansion water stop ring 44 can be dehydrated and retracted to reset. Therefore, through the coordinated operation between the multi-stage adjustment component 1, the material valve body 2, the filter component 3 and the protective component 4, it is easy to extract and replace the worn pneumatic valve stem 16, and it is possible to perform multi-stage flow control inside the material valve body 2.

[0049] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A pneumatic multi-stage pressure-reducing valve core assembly with an adjustable extractable low-temperature regulating valve, comprising: A filtering component (3) and a protective component (4); The invention is characterized in that it further comprises a multi-stage adjustment component (1) and a material valve body (2), the top end of the protection component (4) is fixedly connected to the bottom end of the filter component (3), the material valve body (2) is fixedly connected to the bottom end of the protection component (4), and the multi-stage adjustment component (1) is fixedly connected to the top end of the filter component (3); The multi-stage adjustment component (1) comprises an air control head (11) and a limit sleeve rod frame (12), wherein the air control head (11) is fixedly mounted at the inner top center of the limit sleeve rod frame (12), and limit posts (14) are slidably inserted into the inner sides of the bottom end of the limit sleeve rod frame (12), and a pneumatic valve stem (16) is fixedly connected to the bottom center of the air control head (11), and multi-stage display posts (13) are arranged on both sides of the inner bottom center of the limit sleeve rod frame (12), and an indicator post (15) is fixedly mounted on the upper outer surface of the pneumatic valve stem (16); The outer surface of the limit column (14) is uniformly provided with toothed grooves (110), and both sides of the inner bottom end of the limit sleeve rod frame (12) are slidably connected with plug-in plates (19), one end of the plug-in plate (19) is fixedly connected with a reset handle (17), and the outer surface of one side end of the reset handle (17) is uniformly fixedly connected with a first reset spring (18); A water inlet (22) is provided at the center of the bottom surface of the material valve body (2), a water outlet (21) is provided on the middle outer surface of the material valve body (2), multiple levels of drainage holes (24) are evenly arranged inside the material valve body (2), and an overflow hole (23) is provided at the center of the interior of the material valve body (2); The filter component (3) comprises a filter tube (31), a reel (32), a limit frame (38) and a transmission gear (37); the limit frame (38) is symmetrically fixedly arranged on the upper outer surface of the filter tube (31); the transmission gear (37) is rotatably clamped on the bottom of one end of the limit frame (38); and the reel (32) is welded to the centers of two side surfaces of the transmission gear (37); A traction rope (33) is wound on the outer surface of the winding shaft (32), a bottom end of the traction rope (33) is fixedly connected to an arc-shaped sealing block (35), the inner surface of the arc-shaped sealing block (35) is evenly provided with sealing rings (34), and the outer surface of the arc-shaped sealing block (35) is symmetrically fixedly connected to a second return spring (36); The protective component (4) comprises a limiting extension tube (45) and a protective tube sleeve (49), wherein the protective tube sleeve (49) is symmetrically welded to the outer surface of the limiting extension tube (45), a plug hole (46) is provided at the center of the top of the limiting extension tube (45), an expansion water stop ring (44) is provided on the outer surface of the bottom end of the limiting extension tube (45) and inside the protective tube sleeve (49), an expansion water stop ring (44) is symmetrically fixedly connected to the outer surface of the expansion water stop ring (44), and a transmission rack (41) is fixedly connected to the top of the expansion water stop strip (43), and power supply interfaces (48) are provided at both ends of the top of the limiting extension tube (45), a sealing cavity (42) is provided at the inner top of the limiting extension tube (45), and limiting holes (47) are symmetrically provided at the edges of both ends of the top of the limiting extension tube (45).

2. The pneumatic multi-stage pressure-reducing valve core assembly adjustable extractable low-temperature regulating valve according to claim 1, characterized in that: One end of the first return spring (18) is fixedly connected to the outer surface of the limit sleeve rod frame (12), the plug-in plate (19) penetrates the outer surface of the limit sleeve rod frame (12) and is engaged with the toothed groove (110), and the pneumatic valve stem (16) is movably aligned with the multi-stage display column (13) through the indicator column (15) on the outer surface.

3. The pneumatic multi-stage pressure-reducing valve core assembly adjustable extractable low-temperature regulating valve according to claim 2, characterized in that: The top of the material valve body (2) is aligned with the insertion hole (46) at the center of the bottom of the limit extension tube (45), the pneumatic valve stem (16) passes through the inner center of the filter tube (31) and is slidably plugged into the insertion hole (46), and the inside of the filter tube (31) is evenly installed with fillers.

4. The pneumatic multi-stage pressure-reducing valve core assembly adjustable extractable low-temperature regulating valve according to claim 3, characterized in that: The bottom end of the pneumatic valve stem (16) passes through the plug hole (46) and is plugged into the top inner center of the material valve body (2); the expansion water stop strip (43) is meshed and connected with the transmission gear (37) through the transmission rack (41); and the arc-shaped sealing block (35) is in active contact with the outer surface of the pneumatic valve stem (16) through the sealing ring (34).

5. The pneumatic multi-stage pressure-reducing valve core assembly adjustable extractable low-temperature regulating valve according to claim 4, characterized in that: The arc-shaped sealing block (35) is movably clamped to the inner top end of the limiting extension tube (45) through the sealing cavity (42), one end of the second return spring (36) is fixedly connected to the inner surface of the sealing cavity (42), and the traction rope (33) is slidably connected to the sealing cavity (42) through the limiting hole (47).

6. The pneumatic multi-stage pressure-reducing valve core assembly adjustable extractable low-temperature regulating valve according to claim 5, characterized in that: A heating wire is provided inside the expansion water stop strip (43) and the expansion water stop ring (44); the bottom end of the power supply interface (48) is fixedly connected to the heating wire; and an alarm is provided at the bottom center edge of the multi-stage adjustment component (1) and directly above the transmission rack (41).

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