Blocking type high-pressure gas pressure fine adjustment device

Abstract

The utility model provides a blocking type high-pressure gas pressure fine adjusting device, which relates to the technical field of gas pressure adjusting devices and comprises a piston, a piston cylinder and a crank rocker mechanism connected with the bottom of the piston and used for driving the piston to reciprocate up and down. The crank rocker mechanism is used for driving the piston to reciprocate, the gas transfer grooves in the piston are alternately connected with the high-pressure end and the low-pressure end, high-pressure gas can be finely adjusted by controlling the reciprocating motion rate, the adjusting and controlling effect is good, the structure is simple, and the error-tolerant rate is high. And moreover, a high-pressure electromagnetic stop valve is further arranged, and the high-pressure electromagnetic stop valve and the motor are controlled by the control platform, so that the service life of the piston valve body can be greatly prolonged, and remarkable environmental protection benefits and economic benefits are brought.

Description

Technical Field

[0001] This utility model relates to the technical field of gas pressure regulating devices, specifically to a blocking-type high-pressure gas pressure micro-adjustment device. Background Technology

[0002] In commonly used mechanical equipment, low-pressure hydraulic regulation can be achieved through the cooperation of a hydraulic pump and a servo valve. The servo valve controls the volume of liquid supplied to the low-pressure end to achieve minute adjustments in pressure. This is because liquids have a high volumetric compressibility modulus, the volume of liquid supplied through the servo valve is extremely small, and the flow rate is slow. However, this pressure regulation principle cannot be used in gas pressure regulation, especially in the field of high-pressure gas pressure regulation. This is because the flow rate of gas under high pressure is uncontrollable and the flow state is complex, making it difficult to apply conventional technologies and equipment to the regulation of high-pressure gas pressure. However, mechanical designs powered by high-pressure gas cannot function without pressure fine-tuning, necessitating a solution to the technical challenges of high-pressure gas pressure fine-tuning.

[0003] Utility model patent CN221097054U discloses a high-pressure gas pressure micro-adjustment device, which includes a piston and a piston cylinder. The piston cylinder wall has an inlet channel and an outlet channel. A gas transfer groove is recessed from the outer circumference of the piston valve body. This gas transfer groove alternately connects with the inlet channel and the outlet channel as the piston reciprocates within the piston cylinder. A piston sealing ring is provided between the piston and the piston cylinder. This sealing ring seals the gas passage space formed by the gas transfer groove and the inlet channel or the outlet channel when the gas transfer groove alternately connects with the inlet channel and the outlet channel. The gas transfer groove is arc-shaped and concave to reduce frictional loss between the piston sealing ring and the gas transfer groove or the inlet / outlet channel, extending the service life of the piston sealing ring and thus extending the service life of the high-pressure gas pressure micro-adjustment device. However, the above-mentioned pressure micro-adjustment device has technical defects, including the inability to accurately control the reciprocating motion rate, resulting in poor micro-adjustment effect, and the inability to achieve a good static seal when the piston valve body stops moving.

[0004] In view of this, it is necessary to study a blocking high-pressure gas pressure micro-adjustment device to solve the above-mentioned technical problems. Utility Model Content

[0005] In view of the technical problems existing in the background art, the present invention provides a blocking high-pressure gas pressure micro-adjustment device, which includes a piston, a piston cylinder, and a crank rocker mechanism connected to the bottom of the piston and used to drive the piston to reciprocate up and down.

[0006] The piston cylinder has an intake channel and an exhaust channel with a predetermined height difference on both sides of its cylinder wall.

[0007] The piston has symmetrically recessed gas transfer grooves on its outer circumference; when the gas transfer grooves move up and down, they can alternately connect with the inlet channel and the outlet channel respectively.

[0008] The crank-rocker mechanism includes a crank assembly, a rocker arm connected to the bottom of the piston, a connecting rod assembly that is drivenly connected to the crank assembly and the rocker arm respectively, and a connecting assembly for connecting the rocker arm and the connecting rod assembly.

[0009] As a further improvement of this utility model, the crank assembly includes a crank and a third screw; the two ends of the third screw are respectively connected to the crank and the connecting rod assembly for transmission.

[0010] As a further improvement of this utility model, a sliding groove is provided on the crank, and the third screw is slidably connected to the crank through the sliding groove.

[0011] As a further improvement of this utility model, the blocking high-pressure gas pressure micro-adjustment device also includes a motor for driving the crank assembly to rotate; the crank and the motor are connected by a motor connecting rod.

[0012] As a further improvement of this utility model, the connecting rod assembly includes a second screw and a fisheye connector that are connected to each other; the fisheye portion of the fisheye connector is sleeved and connected to the third screw, and the other end is fixedly connected to the second screw.

[0013] As a further improvement of this utility model, the connecting assembly includes an I-type connector and a Y-type connector that are hinged to each other; the top end of the I-type connector is connected to the rocker arm, and the bottom end of the Y-type connector is connected to the second screw.

[0014] As a further improvement of this utility model, the blocking high-pressure gas pressure micro-adjustment device also includes a low-pressure end and a high-pressure end that are respectively connected to the outlet channel and the inlet channel.

[0015] As a further improvement of this utility model, high-pressure electromagnetic shut-off valves are respectively provided between the air outlet channel and the low-pressure end, and between the air inlet channel and the high-pressure end.

[0016] As a further improvement of this utility model, the blocking high-pressure gas pressure micro-adjustment device also includes a control platform connected to the motor and the high-pressure electromagnetic shut-off valve respectively.

[0017] As a further improvement of this utility model, the connecting assembly also includes a metal cylinder; the metal cylinder is sleeved with the rocker arm, and its bottom end is connected to the top end of the I-type connector; auxiliary adjusting nuts are provided on both sides of the metal cylinder for limiting and fixing the rocker arm and the I-type connector.

[0018] As a further improvement of this utility model, the piston is provided with a threaded opening at the axis near the intake channel; a piston sealing ring is provided between the piston and the piston cylinder wall.

[0019] Beneficial effects:

[0020] 1. The high-pressure gas pressure micro-adjustment device provided by this utility model utilizes a crank-rocker mechanism to drive a piston in reciprocating motion. This allows the gas transfer grooves on the piston to alternately connect with the high-pressure and low-pressure ends, enabling micro-adjustment of the high-pressure gas by controlling the reciprocating motion rate. The device exhibits good control effect, simple structure, and high fault tolerance. The crank-rocker mechanism, through the cooperation of the crank assembly, rocker, connecting rod assembly, and connecting components, drives the piston to achieve stable and efficient up-and-down reciprocating motion. Furthermore, the connecting assembly, formed by hinged I-type and Y-type joints, and the connecting rod assembly, formed by the combination of the second screw and the fisheye joint, achieves efficient connection and transmission between the various components of the crank-rocker mechanism. Additionally, a piston sealing ring is provided between the piston valve body and the piston cylinder wall to alternately prevent gas leakage during the reciprocating motion of the gas transfer grooves, effectively sealing the high-pressure gas. This ensures stability during long-term operation and extends the piston's service life.

[0021] 2. The blocking high-pressure gas pressure micro-adjustment device provided by this utility model hinges the I-type connector and Y-type connector in the connecting assembly. The I-type connector provides a single-axis rotational degree of freedom, suitable for linear force transmission scenarios, and ensures directional load transmission through a rigid shaft-hole fit. The Y-type connector adopts a three-way bifurcated structure, allowing for multi-angle dynamic compensation and achieving balanced distribution of multi-branch loads in complex stress environments. Both reduce structural stress concentration through controllable motion degrees of freedom, improving the motion stability and lifespan of the mechanical system. Furthermore, the hinged structure transmits the up-and-down reciprocating motion from the connecting rod assembly to the rocker arm, canceling out the left-and-right swaying motion. This enables the rocker arm to reciprocate up and down, thereby driving the piston to reciprocate.

[0022] 3. The high-pressure gas pressure micro-adjustment device provided by this utility model further incorporates a high-pressure electromagnetic shut-off valve, which, along with the motor, is controlled via a control platform. The high-pressure electromagnetic shut-off valve is connected to both the inlet and outlet channels, opening when the concave gas transfer groove within the piston valve body connects to both channels. When the motor stops reciprocating, the high-pressure electromagnetic shut-off valve closes synchronously, cutting off the high-pressure and low-pressure channels and preventing the high-pressure gas from impacting and loading the piston valve body, thus reducing deformation. Simultaneously, it maintains stable pressure at both ends, significantly reducing wear on the piston valve body and sealing rings, which is crucial for the efficient and stable operation of the piston valve body and piston cylinder. Therefore, it greatly extends the service life of the piston valve body, resulting in significant environmental and economic benefits.

[0023] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0024] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0025] Figure 1 This is a front view structural schematic diagram of the blocking high-pressure gas pressure micro-adjustment device provided in this embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the left side of the blocking high-pressure gas pressure micro-adjustment device provided in this embodiment of the utility model;

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Piston; 2. Piston cylinder; 3. Inlet passage; 4. Outlet passage; 5. Piston valve body; 6. Gas transfer groove; 7. First high-pressure solenoid shut-off valve; 8. Second high-pressure solenoid shut-off valve; 9. First piston seal ring; 10. Second piston seal ring; 11. Third piston seal ring; 12. Fourth piston seal ring; 13. Rocker arm (first screw); 14. Metal cylinder; 15. First gasket; 16. First nut; 17. Second nut; 18. Type I connector; 19. Type Y connector; 2 0. Third nut; 21. Second screw (connecting rod); 22. Fourth nut; 23. Fisheye connector; 24. Third screw; 25. Fifth nut; 26. Second washer; 27. Third washer; 28. Sixth nut; 29. ​​Fourth washer; 31. Bearing; 32. Motor connecting rod; 33. First screw and washer; 34. Motor; 35. Pin; 36. Crank; 37. Control platform; 38. Low-pressure end (gas-liquid two-phase tank); 39. High-pressure end (high-pressure gas tank); 40. Seventh nut. Detailed Implementation

[0029] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0031] In the description of the embodiments of this utility model, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly defined.

[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0033] In the description of this utility model embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0034] In the description of the embodiments of this utility model, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0035] In the description of the embodiments of this utility model, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0036] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0037] Please see Figures 1 to 2 As shown, this utility model provides a blocking type high-pressure gas pressure micro-adjustment device, including piston 1, piston cylinder 2, motor 34, control platform 37, crank rocker mechanism, low-pressure end (gas-liquid two-phase tank) 38, and high-pressure end (high-pressure gas tank) 39.

[0038] In some embodiments, an air inlet channel 3 and an air outlet channel 4 are respectively provided on both sides of the piston cylinder 2, and a predetermined height difference is provided between the air inlet channel 3 and the air outlet channel 4. The air inlet channel 3 and the air outlet channel 4 are respectively connected to the high-pressure end (high-pressure gas tank) 39 and the low-pressure end (gas-liquid two-phase tank) 38 through a first high-pressure electromagnetic shut-off valve 7 and a second high-pressure electromagnetic shut-off valve 8.

[0039] The piston valve body 5 in the piston 1 has a gas transfer groove 6 symmetrically recessed from its outer circumference. The gas transfer groove 6 is used to alternately connect with the inlet channel 3 and the outlet channel 4 when the piston 1 moves up and down in the piston cylinder 2. This allows the high-pressure end 39 to transfer gas to the low-pressure end 38 in small amounts and multiple times, thereby realizing the blocking micro-adjustment of the high-pressure gas.

[0040] Specifically, the first high-pressure electromagnetic shut-off valve 7 on the air intake channel 3 is a one-way valve, which only allows high-pressure gas to be discharged outwards. The second high-pressure electromagnetic shut-off valve 8 on the air outlet channel 4 is also a one-way valve, which only allows gas to enter inwards. The air intake channel 3 and the air outlet channel 4 are alternately connected to the gas transfer groove 6 through the reciprocating motion of the piston 1.

[0041] Piston sealing rings 9 to 12 are provided between piston 1 and piston cylinder 2. The piston sealing rings are used to seal the gas passage space formed by gas transfer groove 6 and gas inlet channel 3 or gas transfer groove 6 and gas outlet channel 4 when gas transfer groove 6 is alternately connected to gas inlet channel 3 and gas outlet channel 4.

[0042] In some embodiments, the crank-rocker mechanism includes a crank assembly, a rocker (first screw) 13, a connecting rod assembly, and a connecting assembly for connecting the rocker (first screw) 13 and the connecting rod assembly.

[0043] Furthermore, the crank assembly includes a crank 36 and a third screw 24. The crank 36 is connected to the third screw 24 and the motor connecting rod 32 for transmission.

[0044] The rocker arm (first screw) 13 is fixedly connected to the bottom of the piston valve body 5 of the piston 1.

[0045] The connecting rod assembly, which is connected at both ends to the rocker arm (first screw) 13 and the crank assembly respectively, includes a second screw (connecting rod) 21 and a fisheye connector 23 that are interconnected. The fisheye portion of the fisheye connector 23 is sleeved and connected to the third screw 24.

[0046] The connecting assembly includes an I-type connector 18 and a Y-type connector 19 that are hinged together. The top end of the I-type connector 18 is connected to the rocker arm (first screw) 13, and the bottom end of the Y-type connector 19 is connected to the second screw (connecting rod) 21.

[0047] In some specific embodiments, the top end of the rocker arm (first screw) 13 is fixedly connected to the bottom of the piston valve body 5, and the bottom end is fixedly connected to the I-type connector 18. Under the transmission of the I-type connector 18, the rocker arm (first screw) 13 drives the piston valve body 5 to reciprocate up and down. The top end of the second screw (connecting rod) 21 is fixedly connected to the Y-type connector 19 through the third nut 20. Furthermore, the I-type connector 18 and the Y-type connector 19 are hinged together by a pin 35. This hinged structure allows the Y-type connector 19 to swing left and right and reciprocate up and down relative to the I-type connector 18 (the reciprocating up and down motion is transmitted from the Y-type connector 19 to the I-type connector 18, so the reciprocating up and down motion is not relative). The I-type connector 18 provides a single-axis rotational degree of freedom, which is suitable for linear force transmission scenarios, and the rigid shaft hole fit ensures directional load transmission. The Y-type connector 19 adopts a three-way bifurcated structure, which allows for multi-angle dynamic compensation and achieves balanced distribution of multi-branch loads in complex stress environments. Both reduce structural stress concentration through controllable motion degrees of freedom, thereby improving the motion stability and lifespan of the mechanical system.

[0048] Furthermore, the bottom end of the second screw (connecting rod) 21 is fixedly connected to one end of the fisheye connector 23 by a fourth nut 22. The other end of the fisheye connector 23, the fisheye portion, is sleeved and connected to the third screw 24, and is secured with a fifth nut 25, a second washer 26, a third washer 27, and a sixth nut 28. The first end of the motor connecting rod 32 is connected to the motor 34, and its end is fixedly connected to the crank 36 by a first screw and a washer 33.

[0049] In some other embodiments, the connecting assembly further includes a metal cylinder 14; the metal cylinder 14 is sleeved with the rocker arm (first screw) 13, and its bottom end is connected to the top end of the I-type connector 18; auxiliary adjusting nuts are provided on both sides of the metal cylinder 14 to limit and fix the rocker arm (first screw) 13 and the I-type connector 18, and prevent the rocker arm (first screw) 13 and the I-type connector 18 from sliding during reciprocating motion.

[0050] In some specific embodiments, the piston 1 has a threaded opening near the axis of the intake passage 3 (i.e., the bottom of the piston valve body 5) for sealing threaded connection with the rocker arm (first screw) 13.

[0051] Furthermore, the crank 36 is provided with a sliding groove, and the third screw 24 is slidably connected to the crank 36 through the sliding groove. This structural design allows the third screw 24 to rotate eccentrically relative to the sliding groove when the crank 36 rotates.

[0052] Please see Figures 1 to 2As shown, the working principle and process of the crank-rocker mechanism are as follows: the motor 34 starts, driving the motor connecting rod 32 to rotate; the motor connecting rod 32 then drives the crank 36 to rotate. The rotation of the crank 36 causes the third screw 24 to begin to rotate eccentrically relative to the groove of the crank 36. The bearing 31 is sleeved on the third screw 24 and connected to the crank 36. The rotation of the third screw 24 is transmitted to the fisheye joint 23, enabling the driven fisheye joint 23 and the second screw (connecting rod) 21 fixedly connected to the fisheye joint 23 to perform up-and-down movement and left-and-right rocking movement, thereby driving the Y-type joint 19 connected to the second screw (connecting rod) 21 to perform up-and-down movement and left-and-right rocking movement. Based on the hinge structure design between the I-type connector 18 and the Y-type connector 19, the up-and-down movement of the Y-type connector 19 is transmitted to the I-type connector 18, and the left-and-right swinging movement of the I-type connector 18 is restricted, so that the rocker arm (first screw) 13 only moves up and down. Thus, the rocker arm (first screw) 13 drives the piston 1 to move up and down reciprocatingly.

[0053] The control platform 37 is connected to the motor 34, the first high-pressure solenoid shut-off valve 7, and the second high-pressure solenoid shut-off valve 8 respectively. The working process of this structure is as follows:

[0054] When the control platform 37 receives a signal that the motor 34 has started working, the control platform 37 controls the first high-pressure solenoid shut-off valve 7 and the second high-pressure solenoid shut-off valve 8 to open asynchronously. At this time, the gas transfer groove 6 is alternately connected to the inlet channel 3 and the outlet channel 4, respectively, and is in a gas regulation state. Among them, the high-pressure end 39 delivers high-pressure gas to the gas transfer groove 6 through the first high-pressure solenoid shut-off valve 7, and the gas transfer groove 6 transmits high-pressure gas to the low-pressure end 38 through the second high-pressure solenoid shut-off valve 8.

[0055] When the motor 34 is turned off, the control platform 37 receives a signal that the work has stopped and closes the first high-pressure solenoid shut-off valve 7 and the second high-pressure solenoid shut-off valve 8 respectively. This can prevent the high-pressure gas from exerting a continuous high-pressure force on the piston 1, so that the piston 1 is in a sealed pressure-holding space, thereby effectively extending the life of this utility model.

[0056] The gas transfer principle and working process of the blocking high-pressure gas pressure micro-adjustment device provided by this utility model are as follows:

[0057] The reciprocating motion of piston 1 connects the intake channel 3 to the high-pressure end 39 and the outlet channel 4 to the low-pressure end 38. The intake channel 3 is connected to the first high-pressure solenoid shut-off valve 7, and the outlet channel 4 is connected to the second high-pressure solenoid shut-off valve 8. When motor 34 starts, motor connecting rod 32 rotates, driving crank 36 to rotate, which in turn drives the third screw 24 to move eccentrically. Through the hinge structure between I-type connector 18 and Y-type connector 19, and the transmission connection between the second screw (connecting rod) 21 and the third screw 24 via fisheye connector 23, the rocker arm (first screw) 13 is driven to reciprocate up and down. This causes the gas transfer groove 6 on piston valve body 5 to reciprocate up and down, alternately connecting with the intake channel 3 and the outlet channel 4, allowing for the transfer of small amounts of gas from the high-pressure end 39 to the low-pressure end 38 multiple times, thus achieving reciprocating fine-tuning of pressure.

[0058] In summary, this utility model provides a blocking-type high-pressure gas pressure micro-adjustment device, relating to the technical field of gas pressure regulation devices. It includes a piston, a piston cylinder, and a crank-rocker mechanism connected to the bottom of the piston and used to drive the piston's reciprocating motion. By using the crank-rocker mechanism to drive the piston in reciprocating motion, the gas transfer grooves on the piston alternately connect to the high-pressure end and the low-pressure end, allowing for micro-adjustment of the high-pressure gas by controlling the reciprocating motion rate. The adjustment effect is good, the structure is simple, and the fault tolerance is high. The crank-rocker mechanism, through the cooperation between the crank assembly, rocker, connecting rod assembly, and connecting components, can drive the piston to achieve stable and efficient up-and-down reciprocating motion. Furthermore, the connecting components assembled from I-type and Y-type joints, and the connecting rod assembly composed of a second screw and a fisheye joint, achieve efficient connection and coordinated movement among the components of the crank-rocker mechanism.

[0059] It should be noted that this utility model is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and function as the technical concept within the scope of this utility model are included within the technical scope of this utility model. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, are also included within the scope of this utility model without departing from the spirit of this utility model.

Claims

1. A blocking-type high-pressure gas pressure micro-adjustment device, characterized in that, It includes a piston, a piston cylinder, and a crank-rocker mechanism connected to the bottom of the piston and used to drive the piston to reciprocate up and down. The piston cylinder has an intake channel and an exhaust channel with a predetermined height difference on both sides of its cylinder wall. The piston has symmetrically recessed gas transfer grooves on its outer circumference; the gas transfer grooves are alternately connected to the inlet channel and the outlet channel during the up-and-down reciprocating motion. The crank-rocker mechanism includes a crank assembly, a rocker arm connected to the bottom of the piston, a connecting rod assembly that is drivenly connected to the crank assembly and the rocker arm respectively, and a connecting assembly for connecting the rocker arm and the connecting rod assembly.

2. The blocking-type high-pressure gas pressure micro-adjustment device according to claim 1, characterized in that, The crank assembly includes a crank and a third screw; the two ends of the third screw are respectively connected to the crank and the connecting rod assembly for transmission.

3. The blocking-type high-pressure gas pressure micro-adjustment device according to claim 2, characterized in that, The crank is provided with a sliding groove, and the third screw is slidably connected to the crank through the sliding groove.

4. The blocking-type high-pressure gas pressure micro-adjustment device according to claim 2, characterized in that, The blocking high-pressure gas pressure fine adjustment device also includes a motor for driving the crank assembly to rotate; the crank and the motor are connected by a motor connecting rod.

5. The blocking-type high-pressure gas pressure micro-adjustment device according to claim 2, characterized in that, The connecting rod assembly includes a second screw and a fisheye connector that are connected to each other; the fisheye portion of the fisheye connector is sleeved to the third screw, and the other end is fixedly connected to the second screw.

6. The blocking-type high-pressure gas pressure micro-adjustment device according to claim 5, characterized in that, The connecting assembly includes an I-type connector and a Y-type connector that are hinged to each other; the top end of the I-type connector is connected to a rocker arm, and the bottom end of the Y-type connector is connected to a second screw.

7. The blocking-type high-pressure gas pressure micro-adjustment device according to claim 1, characterized in that, The blocking high-pressure gas pressure micro-adjustment device also includes a low-pressure end and a high-pressure end that are respectively connected to the outlet channel and the inlet channel.

8. The blocking-type high-pressure gas pressure micro-adjustment device according to claim 7, characterized in that, High-pressure electromagnetic shut-off valves are respectively installed between the air outlet channel and the low-pressure end, and between the air inlet channel and the high-pressure end.

9. The blocking high-pressure gas pressure fine adjustment device according to claim 4 or 8, characterized in that, The blocking-type high-pressure gas pressure micro-adjustment device also includes a control platform connected to the motor and the high-pressure electromagnetic shut-off valve respectively.

10. The blocking-type high-pressure gas pressure micro-adjustment device according to claim 1, characterized in that, The piston has a threaded opening near the axis of the intake passage for connecting with the rocker arm; a piston sealing ring is provided between the piston and the piston cylinder wall.

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