Adjustable gas extraction pressure valve

Abstract

The utility model relates to an adjustable gas extraction pressure valve, and discloses a pressure valve which can realize gas flow adjustment by rotating an adjusting block to enable the adjusting block to be matched with a conveying hole in an auxiliary adjusting plate so as to change the overlapping area, and can judge the gas flow state according to the position relation of a pointing hole and an auxiliary adjusting hole. The pressure valve is characterized by being composed of a pressure valve body, a connecting plate, an auxiliary adjusting plate, a conveying hole, an adjusting block, a gas detector, a limiting clamping groove, a containing groove, a movable adjusting rod, a supporting spring, a pointing hole and an auxiliary adjusting hole, the pressure valve body is of a cylindrical structure, and the diameter of the outer side face of the pressure valve body is kept unchanged; the diameter of the inner side face from one end to the half position of each pressure valve body is larger than the diameter of the inner side face from the half position to the other end of each pressure valve body, the two pressure valve bodies are coaxially arranged, and the ends, with the larger diameters, of the inner side faces of the two pressure valve bodies are placed close to each other. A sliding connection groove is formed in the inner side face from one end to the half position of the pressure valve body.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of adjustable gas extraction pressure valve, which can quickly adjust the gas transmission flow, belongs to the technical field of gas extraction, especially relates to a kind of pressure valve, which can change the coincident area by rotating adjusting block and cooperating with transmission hole on auxiliary adjusting plate, realize gas flow regulation, and determine the gas flow state by the positional relationship of pointing hole and auxiliary adjusting hole. BACKGROUND

[0002] In the field of gas extraction, pressure valve plays a key role, but the existing pressure valve has many deficiencies. The traditional pressure valve adopts a simple structure design, usually only relies on single aperture or simple gate opening and closing to control and manage gas flow, lacks fine adjustment ability, cannot adapt to the demand of accurate flow control under various gas extraction working conditions, and its sealing performance is poor. When in high-pressure gas environment, leakage phenomenon is easy to occur, which causes major safety risks. In terms of operation, not only the process is complicated, but also it lacks intuitiveness, and the operator cannot accurately know the adjustment status of flow, can only rely on experience to continuously try to adjust, and work efficiency is low, and mistakes are easy to occur.

[0003] Publication No. CN101526144A discloses a gas flow control valve, which includes: a lower valve seat having a flow passage for gas passing through; an upper valve seat fixedly arranged on the top of the lower valve seat, having a tube body and an electromagnetic coil set arranged outside the tube body; the tube body is connected with the flow passage; the electromagnetic coil set can generate a magnetic field after being energized; a magnetic column set has a magnetic force part and a sealing part, the magnetic force part is a permanent magnet and is arranged through the tube body, and the magnetic force part is affected by the magnetic field of the electromagnetic coil set to make the magnetic column set axially displace; when the magnetic column set is displaced, the sealing part changes the proportion of shielding the cross-sectional area of the flow passage, to control the flow of gas passing through the flow passage; a spring is arranged on one side of the top side and the bottom side of the magnetic column set, and the spring is arranged in the axial direction of the magnetic column set to provide the magnetic column set with a balancing force. The above-mentioned gas control valve not only has a complicated process, but also lacks intuitiveness, and the operator cannot accurately know the adjustment status of flow, can only rely on experience to continuously try to adjust, and work efficiency is low, and mistakes are easy to occur. UTILITY MODEL CONTENTS

[0004] In order to improve the above situation, the utility model discloses a kind of adjustable gas extraction pressure valve, which can change the coincident area by rotating adjusting block and cooperating with transmission hole on auxiliary adjusting plate, realize gas flow regulation, and determine the gas flow state by the positional relationship of pointing hole and auxiliary adjusting hole.

[0005] The utility model discloses an adjustable gas extraction pressure valve is realized as follows: the utility model relates to an adjustable gas extraction pressure valve which is composed of a pressure valve body, a connecting plate, an auxiliary adjusting plate, a conveying hole, an adjusting block, a gas detector, a limiting clamping groove, a placing groove, a movable adjusting rod, a supporting spring, a pointing hole and an auxiliary adjusting hole,

[0006] The pressure valve body is in a cylindrical structure, the outer diameter of the pressure valve body remains unchanged, the inner diameter of the pressure valve body from one end to one-half is larger than the inner diameter of the pressure valve body from one-half to the other end, the pressure valve body is provided with two, the two pressure valve bodies are coaxially arranged, and the end with the larger inner diameter of the two pressure valve bodies is close to the placing,

[0007] The pressure valve body is provided with a sliding groove on the inner side from one end to one-half, and the pressure valve body corresponds to the sliding groove one by one,

[0008] The two sides of the connecting plate are fixedly connected with the one end of the two pressure valve bodies respectively, the connecting plate is in a semicircular ring structure, the connecting plate is coaxially arranged with the pressure valve body, the outer diameter of the connecting plate is same with the outer diameter of the pressure valve body, and the inner diameter of the connecting plate is larger than the inner diameter of the one end of the pressure valve body,

[0009] The auxiliary adjusting plate is fixedly connected with the inner side from one-half to the other end of the pressure valve body, and is arranged close to one-half, the auxiliary adjusting plate is in a disc structure, the auxiliary adjusting plate is provided with two, and the auxiliary adjusting plate corresponds to the pressure valve body one by one,

[0010] The two planes of the auxiliary adjusting plate are relatively smooth,

[0011] The auxiliary adjusting plate is provided with a conveying hole, each auxiliary adjusting plate is provided with three conveying holes, the three conveying holes are equidistantly arranged along the circumference of the auxiliary adjusting plate, and the included angle between the two tangent lines of the center axis of the auxiliary adjusting plate is less than 60 degrees,

[0012] The adjusting block is arranged between the two pressure valve bodies, the adjusting block is in a hollow cylindrical structure, a sliding rib is fixedly arranged on the outer side from one end to one-third of the adjusting block, a sliding rib is fixedly arranged on the outer side from two-thirds to the other end of the adjusting block, the sliding rib corresponds to the sliding groove one by one, the adjusting block is rotationally connected with the two pressure valve bodies through the sliding rib and the sliding groove, the outer diameter of the adjusting block from one end to one-third is slightly smaller than the inner diameter of the pressure valve body from one end to one-half, the outer diameter of the adjusting block from two-thirds to the other end is same with the outer diameter of the adjusting block from one end to one-third, the outer diameter of the adjusting block from one-third to two-thirds is smaller than the inner diameter of the connecting plate and larger than the inner diameter of the one end of the pressure valve body,

[0013] The two ends of the adjusting block are smooth and fit with the auxiliary adjusting plate,

[0014] The two ends of the adjusting block are smooth and fit with the auxiliary adjusting plate,

[0015] The inside of the adjusting block is fixed with a gas detector,

[0016] One end of the adjusting block to one-third of the outside of the adjusting block is provided with a set of limiting slots, and the other end of the adjusting block to two-thirds of the outside of the adjusting block is provided with another set of limiting slots, the two sets of limiting slots are symmetrically arranged about the adjusting block, and a plurality of limiting slots in each set are equidistantly arranged along the circumference of the adjusting block, the cross-sectional shape of the limiting slot in the plane perpendicular to the central axis of the pressure valve body is a right trapezoidal structure, and the width of the limiting slot gradually decreases from one end intersecting the outside of the adjusting block to the other end,

[0017] The inside of the adjusting block is fixed with a gas detector,

[0018] The inside of the adjusting block is fixed with a gas detector,

[0019] The inside of the adjusting block is fixed with a gas detector,

[0020] The inside of the adjusting block is fixed with a gas detector,

[0021] The inside of the adjusting block is fixed with a gas detector,

[0022] Further, the outer side of the adjusting block one-third to two-thirds is fixed with anti-skid strips, the anti-skid strips are long strip structures, a plurality of anti-skid strips are arranged equidistantly in the circumferential direction of the adjusting block, and the part intersecting with the auxiliary adjusting hole is not provided with an anti-skid strip,

[0023] Further, the auxiliary adjusting plate and the transmission hole in the adjusting block are replaced by a special-shaped transmission hole, the special-shaped transmission hole is a fan-shaped structure, the center of the arc surface of the special-shaped transmission hole coincides with the center axis of the pressure valve body, and the included angle between the two straight lines of the special-shaped transmission hole is less than 60 degrees. Beneficial effects

[0024] I. Rotating the adjusting block can finely change the overlapping area of the transmission hole, so that the gas flow can be accurately adjusted.

[0025] II. The pointing hole coated with a colored coating is used to indicate the position of the adjusting block, so that the operator can intuitively judge whether the pressure valve is in a sealed state or a different flow state, and the operation is simple.

[0026] III. The gas detector detects the gas content in the adjusting block in real time, so that the situation of poor sealing and leakage risk can be found in time, and the use safety is ensured.

[0027] IV. The limiting clamping groove of the adjusting block cooperates with the movable adjusting rod and the supporting spring, so that the rotating angle of the adjusting block can be accurately ensured, and the adjusting block can be prevented from accidentally rotating due to external factors, and the stability of the overall structure of the pressure valve is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a perspective view of the adjustable gas extraction pressure valve of the utility model;

[0029] Figure 2 It is a structural schematic view of the adjustable gas extraction pressure valve of the utility model;

[0030] Figure 3 It is a structural schematic view of the adjustable gas extraction pressure valve of the utility model;

[0031] Figure 4 It is a perspective view of the embodiment 2 of the adjustable gas extraction pressure valve of the utility model;

[0032] Figure 5 It is a structural schematic view of the embodiment 3 of the adjustable gas extraction pressure valve of the utility model.

[0033] Wherein is: pressure valve body (1), point to hole (2), auxiliary adjusting hole (3), adjusting block (4), transmission hole (5), auxiliary adjusting plate (6), connecting plate (7), placing groove (8), supporting spring (9), movable adjusting rod (10), limit card slot (11), gas detector (12), anti-skid strip (13), special-shaped transmission hole (14). DETAILED DESCRIPTION Example 1

[0034] The utility model relates to a kind of adjustable gas extraction pressure valves, which is implemented as follows: the utility model relates to a kind of adjustable gas extraction pressure valve, which is composed of pressure valve body (1), connecting plate (7), auxiliary adjusting plate (6), transmission hole (5), adjusting block (4), gas detector (12), limit card slot (11), placing groove (8), movable adjusting rod (10), supporting spring (9), pointing hole (2) and auxiliary adjusting hole (3),

[0035] The pressure valve body (1) is in cylindrical structure, the outer diameter of the pressure valve body (1) remains unchanged, the inner diameter of the pressure valve body (1) from one end to one-half is greater than that from one-half to the other end, and the pressure valve body (1) is provided with two, the two pressure valve bodies (1) are coaxially arranged, and the end with larger inner diameter of the two pressure valve bodies (1) is close to the placement,

[0036] The pressure valve body (1) is provided with a sliding groove on the inner side from one end to one-half, and the pressure valve body (1) corresponds to the sliding groove one by one,

[0037] The connecting plate (7) is fixedly connected to the one end of the two pressure valve bodies (1) on both sides, the connecting plate (7) is in semicircular ring structure, the connecting plate (7) is coaxially arranged with the pressure valve body (1), the outer diameter of the connecting plate (7) is the same as the outer diameter of the pressure valve body (1), and the inner diameter of the connecting plate (7) is greater than the inner diameter of the one end of the pressure valve body (1),

[0038] The auxiliary adjusting plate (6) is fixedly connected to the inner side of the pressure valve body (1) from one-half to the other end, and is arranged close to one-half, the auxiliary adjusting plate (6) is in disc structure, the auxiliary adjusting plate (6) is provided with two, and the auxiliary adjusting plate (6) corresponds to the pressure valve body (1) one by one,

[0039] The two planes of the auxiliary adjusting plate (6) are relatively smooth,

[0040] The auxiliary adjusting plate (6) is provided with a transmission hole (5), and each auxiliary adjusting plate (6) is provided with three transmission holes (5), and the three transmission holes (5) are arranged at equal intervals along the circumference of the auxiliary adjusting plate (6), and the included angle between the two tangent lines passing through the center axis of the auxiliary adjusting plate (6) is less than 60 degrees,

[0041] The adjusting block (4) is arranged between the two pressure valve bodies (1), the adjusting block (4) is in a hollow cylindrical structure, a sliding rib is fixedly arranged on the outer side of one-third of the adjusting block (4), and another sliding rib is fixedly arranged on the outer side of two-thirds of the adjusting block (4), the sliding rib corresponds to the sliding groove, the adjusting block (4) is rotationally connected with the two pressure valve bodies (1) through the sliding rib and the sliding groove, the diameter of the outer side of one-third of the adjusting block (4) is slightly smaller than the diameter of the inner side of one-half of the pressure valve body (1), the diameter of the outer side of two-thirds of the adjusting block (4) is the same as the diameter of the outer side of one-third of the adjusting block (4), and the diameter of the outer side of one-third of the adjusting block (4) is smaller than the diameter of the inner side of the connecting plate (7) and larger than the diameter of the inner side of the pressure valve body (1),

[0042] The planes of the two ends of the adjusting block (4) are smooth and fit with the auxiliary adjusting plate (6),

[0043] The two ends of the adjusting block (4) are provided with transmission holes (5), the transmission holes (5) on the adjusting block (4) have the same diameter and the same position relationship as the transmission holes (5) on the auxiliary adjusting plate (6),

[0044] The inner side of the adjusting block (4) is fixedly provided with a gas detector (12),

[0045] The outer side of one-third of the adjusting block (4) is provided with a set of limiting grooves (11), the outer side of two-thirds of the adjusting block (4) is provided with another set of limiting grooves (11), the two sets of limiting grooves (11) are symmetrically arranged about the adjusting block (4), and a plurality of limiting grooves (11) in each set are arranged at equal intervals along the circumference of the adjusting block (4), the limiting groove (11) has a right trapezoidal structure in the cross section perpendicular to the central axis of the pressure valve body (1), and the width of the limiting groove (11) gradually decreases from one end intersecting the outer side of the adjusting block (4) to the other end,

[0046] The inner side of one-half of the pressure valve body (1) is provided with a placing groove (8), the placing groove (8) has an arc structure, each pressure valve body (1) corresponds to a set of placing grooves (8), and a plurality of placing grooves (8) in each set are arranged at equal intervals along the circumference of the pressure valve body (1),

[0047] The movable adjusting rod (10) is arranged in the placing groove (8), one end of the movable adjusting rod (10) is rotationally connected with the placing groove (8), the width of the movable adjusting rod (10) from one end to four-fifths of the length is constant, the shape of the movable adjusting rod (10) from four-fifths of the length to the other end is similar to that of the limiting clamping groove (11), and the movable adjusting rod (10) corresponds to the placing groove (8) one by one,

[0048] One end of the supporting spring (9) is fixedly connected with the outer arc surface of the placing groove (8), the other end is fixedly connected with the movable adjusting rod (10), and the supporting spring (9) corresponds to the placing groove (8) one by one,

[0049] The pressure valve body (1) is provided with a pointing hole (2) on the outer side of the part not intersecting with the connecting plate (7), the width of the pointing hole (2) gradually decreases from one end intersecting with the outer side of the pressure valve body (1) to the other end, and the other end of the pointing hole (2) and the midpoint of the auxiliary adjusting plate (6) on the pressure valve body (1) and the central axis of the pressure valve body (1) are on the same plane, the pointing hole (2) is provided with two, the included angle between the connecting line of the two pointing holes (2) and the central axis of the pressure valve body (1) is 60 degrees, and one of the pointing holes (2) is coated with a colored coating,

[0050] The outer side of one-third to two-thirds of the adjusting block (4) is provided with an auxiliary adjusting hole (3), the width of the auxiliary adjusting hole (3) gradually decreases from one end intersecting with the outer side of the adjusting block (4) to the other end, and the other end of the auxiliary adjusting hole (3) and the midpoint of the auxiliary adjusting plate (6) on the adjusting block (4) and the central axis of the pressure valve body (1) are on the same plane, the auxiliary adjusting hole (3) is provided with three, and the three auxiliary adjusting holes (3) are equidistantly arranged along the circumference of the adjusting block (4),

[0051] In use, first rotate the adjusting block (4) until the color-coated pointing hole (2) at the other end is aligned with the auxiliary adjusting hole (3), at this time the adjusting block (4) is completely misaligned with the corresponding part on the auxiliary adjusting plate (6), so that the adjusting block (4) can effectively block the two pressure valve bodies (1), then the other end of the two pressure valve bodies (1) is respectively and stably connected with the gas pipeline, when it is needed to start gas delivery, the adjusting block (4) is rotated in a specific direction, i.e. from the pointing hole (2) without coating to the pointing hole (2) with coating, until the next auxiliary adjusting hole (3) appears, in the process of gradually approaching the auxiliary adjusting hole (3) to the pointing hole (2) without coating, the communicating area between the adjusting block (4) and the transmission hole (5) on the auxiliary adjusting plate (6) continuously increases, and the gas delivery amount gradually increases, when the gas delivery amount reaches the expected value, the rotation of the adjusting block (4) is stopped, and the rotation of the adjusting block (4) is continued until the pointing hole (2) without coating points to the new auxiliary adjusting hole (3), and the gas delivery amount reaches the maximum, if it is needed to reduce the delivery amount, the adjusting block (4) is rotated again in the same direction until the color-coated pointing hole (2) points to the new auxiliary adjusting hole (3), at this time the pressure valve enters the sealed state. In the sealed state, the gas detector (12) can detect the gas content in the adjusting block (4) in real time, if the gas content is greatly reduced compared with the initial state, it indicates that the pressure valve is not completely sealed, and there is a risk of gas leakage. Embodiment 2

[0052] The difference between this embodiment and embodiment 1 is that the outer side of one-third to two-thirds of the adjusting block (4) is fixedly provided with anti-skid strips (13), the anti-skid strips (13) are in long strip-shaped structures, a plurality of anti-skid strips (13) are equidistantly arranged along the circumference of the adjusting block (4), and the part intersecting with the auxiliary adjusting hole (3) is not provided with an anti-skid strip (13), in use, the anti-skid strips (13) can effectively increase the friction between the hand and the adjusting block (4), so that the operator can better exert force when rotating the adjusting block (4), and avoid operation errors caused by hand slipping; Embodiment 3

[0053] The difference between this embodiment and embodiment 1 is that the transmission hole (5) on the auxiliary adjusting plate (6) and the adjusting block (4) is replaced by a special-shaped transmission hole (14), the special-shaped transmission hole (14) is in a fan-shaped structure, the center of the arc surface of the special-shaped transmission hole (14) coincides with the center axis of the pressure valve body (1), and the included angle between the two straight lines of the special-shaped transmission hole (14) is less than 60 degrees, in use, the cross-sectional area of the special-shaped transmission hole (14) is larger than that of the transmission hole (5), which can allow a larger amount of gas to pass through;

[0054] The adjusting block (4) is rotatably connected with the two pressure valve bodies (1) through the sliding connecting ribs matched with the sliding connecting grooves, so that the stability of the adjusting block (4) during rotation is ensured, the adjusting block (4) is prevented from deviating under the action of high-pressure gas, and the accuracy and reliability of pressure adjustment are ensured.

[0055] The auxiliary adjusting plate (6) is provided with three transmission holes (5) arranged at equal intervals in the circumferential direction, and the angle between the two tangent lines passing through the center axis of the auxiliary adjusting plate (6) is less than 60 degrees, so that when the adjusting block (4) is rotated to a specific position, the transmission holes (5) on the adjusting block (4) and the transmission holes (5) on the auxiliary adjusting plate (6) can be completely staggered, the complete sealing of gas transmission is ensured, gas leakage is prevented, and the sealing function can be realized without complex additional sealing devices, the structure of the pressure valve is simplified, and the manufacturing cost and maintenance difficulty are reduced.

[0056] The adjusting block (4) is designed as a hollow cylindrical structure, which reduces the weight while ensuring the strength, is convenient to operate, and has an outer diameter of different parts matched with the inner diameter of the pressure valve body (1), so that the adjusting block (4) can be accurately rotated in the pressure valve body (1) to accurately adjust the gas flow.

[0057] The transmission holes (5) at both ends of the adjusting block (4) and the transmission holes (5) on the auxiliary adjusting plate (6) have the same diameter and the same position relationship, so that during the rotation of the adjusting block (4), the gas can smoothly pass through the pressure valve, and the gas flow can be accurately adjusted by controlling the overlapping area of the transmission holes (5).

[0058] The gas detector (12) is fixed on the inner side of the adjusting block (4), which can monitor the gas content in the adjusting block (4) in real time, find out safety hazards such as leakage of the pressure valve in time, and improve the safety and reliability of the pressure valve.

[0059] A group of limiting clamping grooves (11) are arranged on the outer side of the adjusting block (4) from one end to one third of the adjusting block (4), and a plurality of limiting clamping grooves (11) in each group are arranged at equal intervals in the circumferential direction of the adjusting block (4), so that the rotation angle of the adjusting block (4) is fixed and uniform during each rotation, and the rotation angle of the adjusting block (4) can be accurately controlled by the operator.

[0060] The cross-sectional shape of the limiting slot (11) in the plane perpendicular to the central axis of the pressure valve body (1) is a right trapezoidal structure, and the limiting slot (11) gradually decreases in width from one end intersecting the outer side of the adjusting block (4) to the other end. When the movable adjusting rod (10) is clamped into the limiting slot (11), the hypotenuse of the right trapezoid can guide the movable adjusting rod (10) into the slot, and the right angle side can block the movable adjusting rod (10) when it reaches the predetermined position, ensuring that the adjusting block (4) rotates in one direction. When the adjusting block (4) rotates in a certain direction, the movable adjusting rod (10) can smoothly move from one limiting slot (11) to the next limiting slot (11), and if the adjusting block (4) is attempted to be rotated in the opposite direction, the movable adjusting rod (10) will be blocked by the right angle side of the limiting slot (11), thereby preventing reverse rotation and ensuring the normality and safety of the operation;

[0061] The design that one end of the supporting spring (9) is fixedly connected with the outer arc surface of the placing groove (8), and the other end is fixedly connected with the movable adjusting rod (10), can ensure that the movable adjusting rod (10) is stably located in the limiting slot (11), and even in the case of certain vibration or external interference, the elastic force of the spring can resist these disturbances to prevent the movable adjusting rod (10) from coming out of the slot, thereby avoiding accidental rotation of the adjusting block (4);

[0062] The design that the pointing hole (2) on the outer side of one end of the pressure valve body (1) gradually decreases in width and is in the same plane as the midpoint of the auxiliary adjusting plate (6) and the central axis of the pressure valve body (1), can serve as an intuitive indication of the rotating position of the adjusting block (4). The operator can quickly understand the current position of the adjusting block (4) and the gas flow regulation state by observing the position of the pointing hole (2), which is convenient for operation;

[0063] Two pointing holes (2) are provided, and the included angle between the two pointing holes (2) and the line connecting the central axis of the pressure valve body (1) is 60 degrees. One of the pointing holes (2) is coated with a colored coating. The position of the colored coating pointing hole (2) can be quickly distinguished by observing the position of the colored coating pointing hole (2), and the pressure valve can be quickly judged and operated by observing the position of the colored coating pointing hole (2), ensuring that the pressure valve is accurately in the sealed or open state, and ensuring the safe and stable operation of the gas extraction system;

[0064] Three auxiliary adjusting holes (3) are provided, and the three auxiliary adjusting holes (3) are arranged equidistantly along the circumference of the adjusting block (4). The operator only needs to rotate the adjusting block (4) and observe the relative positional relationship between the auxiliary adjusting holes (3) and the transmission holes (5) of the auxiliary adjusting plate (6) to intuitively understand the regulation of the gas flow, without the need for complex instrument readings or calculations, reducing the requirement for professional skills of the operator;

[0065] The purpose is to change the coincident area by rotating the adjusting block (4) to match the transmission hole (5) on the auxiliary adjusting plate (6), to realize the gas flow regulation, and to determine the gas flow state through the position relationship of the pointing hole (2) and the auxiliary adjusting hole (3).

[0066] It should be noted that, unless otherwise specified and limited, the terms "placed", "connected", "connected" should be broadly understood, for example, it can be a fixed connection mode such as folding connection, rivet connection, pin connection, bonding connection and welding connection, or it can be a detachable connection mode such as threaded connection, buckle connection and hinge connection, or integrated connection, or electrical connection, or direct connection, or indirect connection through an intermediate medium, or communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0067] It should be further pointed out that, in the description of the above specific embodiments, only the differences between the other embodiments are described for simplicity and clarity, but those skilled in the art should know that the above specific embodiments themselves are also independent technical solutions.

Claims

1. An adjustable gas extraction pressure valve, characterized in that: The device comprises a pressure valve body, a connecting plate, an auxiliary adjusting plate, a transmission hole, an adjusting block, a gas detector, a limit slot, a placement slot, a movable adjusting rod, a support spring, a pointing hole, and an auxiliary adjusting hole. Two pressure valve bodies are provided. Each pressure valve body has a sliding groove on its inner surface from one end to halfway down. The two sides of the connecting plate are fixedly connected to one end of each of the two pressure valve bodies. The auxiliary adjusting plate is fixedly connected to the inner surface of each pressure valve body from halfway down to the other end, and is positioned close to the halfway point. The auxiliary adjusting plate has a transmission hole. The adjusting block is placed between the two pressure valve bodies. A sliding rib is fixedly placed on the outer surface of the adjusting block from two-thirds down to the other end. The sliding rib corresponds one-to-one with the sliding groove, and the adjusting block slides through the sliding rib. The groove is rotatably connected to the two pressure valve bodies. Both ends of the adjusting block have transmission holes. A gas detector is fixedly placed on the inner side of the adjusting block. A set of limiting slots is opened on the outer side of the adjusting block from one end to one-third of its length. Another set of limiting slots is opened on the outer side of the adjusting block from two-thirds of its length to the other end. A placement groove is opened on the inner side of the pressure valve body from one end to one-half of its length. The movable adjusting rod is placed in the placement groove. One end of the movable adjusting rod is rotatably connected to the placement groove. One end of the supporting spring is fixedly connected to the outer arc surface of the placement groove, and the other end is fixedly connected to the movable adjusting rod. A pointing hole is opened on the outer side of the part of the pressure valve body that does not intersect with the connecting plate. An auxiliary adjusting hole is opened on the outer side of the adjusting block from one-third to two-thirds of its length.

2. The adjustable gas extraction pressure valve according to claim 1, characterized in that... Anti-slip strips are fixedly placed on the outer side of the adjusting block at one-third to two-thirds of its length. The anti-slip strips are long strips, and there are multiple anti-slip strips. The multiple anti-slip strips are arranged at equal intervals along the circumference of the adjusting block, and no anti-slip strips are provided at the part that intersects with the auxiliary adjusting hole.

3. The adjustable gas extraction pressure valve according to claim 1, characterized in that... The transmission holes on the auxiliary adjustment plate and adjustment block are replaced with irregularly shaped transmission holes. The irregularly shaped transmission holes have a fan-shaped structure, and the center of the arc surface of the irregularly shaped transmission hole coincides with the central axis of the pressure valve body. The included angle between the two straight lines of the irregularly shaped transmission hole is less than 60 degrees.

4. An adjustable gas extraction pressure valve according to claim 1, characterized in that... The pressure valve body has a cylindrical structure, and the outer diameter of the pressure valve body remains constant. The inner diameter of the pressure valve body from one end to the halfway point is greater than the inner diameter from the halfway point to the other end. The two pressure valve bodies are coaxially arranged, and the ends with the larger inner diameters of the two pressure valve bodies are placed close together. The pressure valve bodies correspond one-to-one with the sliding grooves. The connecting plate has a semi-circular ring structure and is coaxially arranged with the pressure valve body. The outer diameter of the connecting plate is the same as the outer diameter of the pressure valve body, and the inner diameter of the connecting plate is greater than the inner diameter of one end of the pressure valve body.

5. An adjustable gas extraction pressure valve according to claim 1, characterized in that... The auxiliary adjustment plate has a disc-shaped structure, and there are two auxiliary adjustment plates. Each auxiliary adjustment plate corresponds to a pressure valve body. The two planes of the auxiliary adjustment plate are relatively smooth. Each auxiliary adjustment plate has three transmission holes, which are arranged equidistantly along the circumference of the auxiliary adjustment plate. The included angle between the two tangents of the central axis of the auxiliary adjustment plate through one of the transmission holes is less than 60 degrees.

6. An adjustable gas extraction pressure valve according to claim 1, characterized in that... The adjusting block has a hollow cylindrical structure. A sliding rib is fixed on the outer side of one-third of the adjusting block. The diameter of the outer side of one-third of the adjusting block is smaller than the diameter of the inner side of one-half of the pressure valve body. The diameter of the outer side of the adjusting block from two-thirds to the other end is the same as the diameter of the outer side from one-third to the first end. The diameter of the outer side of the adjusting block from one-third to two-thirds is smaller than the diameter of the inner side of the connecting plate and larger than the diameter of the inner side of one end of the pressure valve body. The two ends of the adjusting block are relatively smooth and fit in close contact with the auxiliary adjusting plate.

7. An adjustable gas extraction pressure valve according to claim 6, characterized in that... The transmission holes on the adjusting block and the transmission holes on the auxiliary adjusting plate have the same diameter, and the number and position relationship are the same. The two sets of limiting slots are symmetrically arranged about the adjusting block. Multiple limiting slots in each set are arranged at equal intervals along the circumference of the adjusting block. The cross-sectional shape of the limiting slots on the plane perpendicular to the central axis of the pressure valve body is a right trapezoidal structure. The width of the limiting slots gradually decreases from one end intersecting with the outer side of the adjusting block to the other end.

8. An adjustable gas extraction pressure valve according to claim 1, characterized in that... The placement slot has an arc-shaped structure, and each pressure valve body corresponds to a set of placement slots. The multiple placement slots in each set are arranged at equal intervals along the circumference of the pressure valve body. The width of the movable adjusting rod remains unchanged from one end to four-fifths of the way down, and the shape from four-fifths of the way down to the other end is similar to the shape of the limiting slot. The movable adjusting rod corresponds to the placement slot one by one, and the supporting spring corresponds to the placement slot one by one.

9. An adjustable gas extraction pressure valve according to claim 1, characterized in that... The width of the pointer hole gradually decreases from one end intersecting with the outer surface of the pressure valve body to the other end, and the other end of the pointer hole is on the same plane as the midpoint of an auxiliary adjustment plate on the pressure valve body and the central axis of the pressure valve body. There are two pointer holes, and the angle between the line connecting the two pointer holes and the central axis of the pressure valve body is 60 degrees. One of the pointer holes is coated with a colored coating.

10. An adjustable gas extraction pressure valve according to claim 1, characterized in that... The width of the auxiliary adjustment hole gradually decreases from one end intersecting with the outer side of the adjustment block to the other end. The other end of the auxiliary adjustment hole is on the same plane as the midpoint of the auxiliary adjustment plate on the adjustment block and the central axis of the pressure valve body. There are three auxiliary adjustment holes, which are arranged at equal intervals along the circumference of the adjustment block.

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