High pressure differential labyrinth pressure reducing structure and sleeve regulating valve

Abstract

The application relates to the technical field of valves, in particular to a high-pressure-difference labyrinth pressure-reducing structure and a sleeve adjusting valve, which comprises a pressure-reducing sleeve and a labyrinth sleeve assembly, wherein the pressure-reducing sleeve is used for being connected at the bottom end of a valve cylinder, the pressure-reducing sleeve is in the shape of a cylinder with an open top end, a plurality of pressure-reducing holes are arranged at the bottom of the side wall of the pressure-reducing sleeve in a circumferential direction; the labyrinth sleeve assembly comprises a first cylinder, a second cylinder, a third cylinder, a fourth cylinder and a fifth cylinder from inside to outside, the cylinders are jointly arranged outside the pressure-reducing sleeve, the adjacent cylinders are mutually adhered, and the first cylinder is adhered to the outer surface of the pressure-reducing sleeve. According to the application, the lift valve core is linked with the third cylinder, so that the valve opening degree change can synchronously adjust the dislocation degree and the flow resistance of the labyrinth flow channel; when the valve opening degree is increased, the labyrinth flow channel resistance is synchronously increased, the gas obtains stronger pressure reduction and throttling effect under large-flow conditions, and the outlet gas pressure is reduced.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a high-pressure differential labyrinth pressure reducing structure and a sleeve regulating valve. Background Technology

[0002] Currently, in the field of fluid control, sleeve control valves are widely used in applications requiring pressure reduction and discharge of high-pressure gas. These valves typically control the flow rate of the medium passing through them by adjusting the valve opening through a rising or falling valve core. However, under high pressure differential conditions, the gas flowing through the valve generates a high velocity, which can easily lead to airflow impact, increased noise and vibration, and even damage to the valve's internal components.

[0003] To address the aforementioned issues, existing technologies often incorporate a labyrinth-type pressure-reducing structure downstream of the valve. This structure uses multi-stage throttling and diversion to gradually release gas energy, thereby reducing outlet velocity and pressure fluctuations. However, most existing labyrinth pressure-reducing structures are fixed designs, meaning the effective flow area and flow path length of the labyrinth channel remain constant. When the valve opening changes, especially when switching from low-pressure, low-flow conditions to high-pressure, high-flow conditions, the fixed flow channel structure cannot adjust its resistance characteristics according to actual exhaust requirements. For example, under high-pressure conditions, the labyrinth channel may have insufficient resistance, resulting in ineffective pressure reduction; conversely, under relatively stable gas pressure conditions, excessive resistance may hinder exhaust flow. Therefore, this invention proposes a high-pressure differential labyrinth pressure-reducing structure and a sleeve regulating valve to effectively solve these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a high-pressure differential labyrinth pressure reducing structure and a sleeve regulating valve to solve the problems mentioned in the background art.

[0005] This invention is achieved through the following technical solution: a high-pressure differential labyrinth decompression structure, comprising: A pressure-reducing sleeve is used to connect to the bottom end of a valve cylinder. The pressure-reducing sleeve is a cylindrical shape with an open top, and several pressure-reducing holes are distributed circumferentially at intervals on the bottom of its side wall. A labyrinth sleeve assembly, comprising, from the inside out, a first cylinder, a second cylinder, a third cylinder, a fourth cylinder, and a fifth cylinder, all cylinders being fitted together on the outside of a pressure-reducing sleeve, with adjacent cylinders fitting together. The first cylinder is fitted to the outer surface of the pressure-reducing sleeve. The first, second, third, fourth, and fifth cylinders are all provided with labyrinth flow channels corresponding to the pressure-reducing holes. The first, second, fourth, and fifth cylinders are all fixedly connected to the pressure-reducing sleeve, and the third cylinder is rotatably fitted to the pressure-reducing sleeve. The transmission assembly is connected to the lifting valve core and configured to drive the third cylinder to rotate in response to the lifting action of the lifting valve core. When the lifting valve core rises and increases the valve opening, the transmission assembly can drive the third cylinder to rotate in the resistance-increasing direction to increase the resistance of gas entering the labyrinth flow channel.

[0006] To enable the labyrinth sleeve assembly to control exhaust resistance, the assembly also includes an assembly ring, which is bolted to the bottom end of the pressure-reducing sleeve. The bottom ends of the first, second, fourth, and fifth cylinders are all fixedly connected to the assembly ring. The first, second, third, fourth, and fifth cylinders are respectively provided with a first through hole, a second through hole, a third through hole, a fourth through hole, and a fifth through hole, corresponding one-to-one with the pressure-reducing holes. These through holes are sequentially distributed radially along the labyrinth sleeve assembly and together form a labyrinth flow channel. Both the first and fifth through holes are circular, while the second, third, and fourth through holes are elongated arc-shaped holes extending circumferentially along the corresponding cylinders. The first through hole is directly opposite the second through hole, and the fifth through hole is directly opposite the fourth through hole. When the lifting valve core is in the closed position, the third through hole is completely aligned with the second and fourth through holes. When the lifting valve core rises and increases the valve opening, the third cylinder rotates with the rising action of the lifting valve core, causing the circumferential misalignment of the third through hole with the second and fourth through holes to gradually increase.

[0007] Optionally, the top of the pressure-reducing sleeve has an annular cavity for the third cylinder to be inserted into, and a sealing ring that fits tightly against the third cylinder is fixedly embedded at the bottom of the annular cavity. The left and right sidewalls of the pressure-reducing sleeve each have axially arranged sliding openings, and the inner walls of the third cylinder each have helical drive grooves on opposite sides. The transmission assembly includes two drive pins that are movably inserted into the sliding openings, with the ends of the two drive pins respectively embedded in the corresponding drive grooves.

[0008] Optionally, the transmission assembly includes a connecting sleeve, a connecting rod, and displacement blocks. The connecting sleeve is threaded to the bottom end of the lifting valve core. The two displacement blocks are respectively connected to the connecting sleeve through two connecting rods, and the two displacement blocks are respectively connected to the two drive columns.

[0009] The present invention also proposes a sleeve regulating valve, including a valve body 1, a valve cylinder 1, a lifting valve core 1, and the above-mentioned high pressure differential labyrinth pressure reducing structure; The valve body has an air inlet on its side and an exhaust port at its bottom. A valve cylinder is housed within the valve body, and a lifting valve core is vertically mounted within the valve cylinder. The top end of the pressure-reducing sleeve is connected to the bottom end of the valve cylinder. An electric actuator is also provided at the top of the valve body. The output end of the electric actuator is connected to the lifting valve core via a valve stem, driving the lifting valve core to move axially. Several vent holes are evenly distributed through the side wall of the valve cylinder, and the lifting valve core is sealed to the inner wall of the valve cylinder.

[0010] Compared with the prior art, the present invention provides a high-pressure differential labyrinth pressure reducing structure and a sleeve regulating valve, which has the following beneficial effects: 1. This invention links the lifting valve core with the third cylinder, so that the valve opening can synchronously adjust the misalignment degree and flow resistance of the labyrinth flow channel. When the valve opening increases, the resistance of the labyrinth flow channel increases synchronously, so that the gas can obtain stronger pressure reduction and throttling effect under high flow conditions, which helps to reduce the outlet gas pressure. 2. When the valve opening decreases, the third cylinder reduces the degree of misalignment of the labyrinth flow channel, thereby reducing the flow resistance and allowing the gas to be discharged more smoothly through the pressure-reducing structure. Thus, this solution can adaptively adjust the resistance of the labyrinth flow channel under different exhaust volume conditions, taking into account both the pressure reduction requirements at high flow rates and the exhaust smoothness at low flow rates. 3. This invention uses the linear motion of the lifting valve core to coordinate with the rotational motion of the third cylinder through the helical drive groove, thereby achieving mechanical linkage between valve opening adjustment and labyrinth flow channel resistance adjustment. There is no need to set a separate drive source for the labyrinth sleeve assembly. This transmission structure is relatively compact and easy to integrate and arrange in the sleeve regulating valve, which helps to simplify the number of internal components and assembly process. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the first state structure of the pressure-reducing sleeve of the present invention; Figure 3 This is a cross-sectional view of the second state structure of the pressure-reducing sleeve of the present invention; Figure 4 This is a schematic diagram of the labyrinth sleeve assembly structure of the present invention; Figure 5 This is a cross-sectional view of the labyrinth sleeve assembly structure of the present invention; Figure 6 This is a schematic cross-sectional view of the labyrinth sleeve assembly of the present invention in its first state; Figure 7 This is a schematic cross-sectional view of the labyrinth sleeve assembly of the present invention in its second state; Figure 8 for Figure 2 Enlarged view of point A in the middle; Figure 9 for Figure 6 Enlarged view of point B in the middle; Figure 10 for Figure 7 Enlarged view of the corresponding area at point C.

[0012] In the diagram: 100, pressure reducing sleeve; 101, pressure reducing hole; 102, annular cavity; 103, sealing ring; 104, sliding port; 200, labyrinth sleeve assembly; 201, first cylinder; 202, second cylinder; 203, third cylinder; 204, fourth cylinder; 205, fifth cylinder; 206, assembly ring; 207, first through hole; 208, second through hole; 209, third through hole; 210, fourth through hole; 211, fifth through hole; 212, drive groove; 300, transmission assembly; 301, drive column; 302, connecting sleeve; 303, connecting rod; 304, displacement block; 400, valve body; 500, valve cylinder; 600, lifting valve core; 700, electric actuator; 800, valve stem. Detailed Implementation

[0013] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0014] Example 1: Please refer to Figure 1 - Figure 10 This application proposes a high-pressure differential labyrinth pressure-reducing structure, including a pressure-reducing sleeve 100, a labyrinth sleeve assembly 200, and a transmission assembly 300. The pressure-reducing sleeve 100 is connected to the bottom end of a valve cylinder 500. The pressure-reducing sleeve 100 is a cylindrical shape with an open top, and its bottom side wall has a plurality of pressure-reducing holes 101 spaced circumferentially. The upper opening of the pressure-reducing sleeve 100 can communicate with the interior of the valve cylinder 500, allowing gas to enter the pressure-reducing sleeve 100 after the lifting valve core 600 is opened, and then flow outward through the pressure-reducing holes 101. The circumferential distribution of the pressure-reducing holes 101 facilitates more uniform gas discharge.

[0015] The specific details of the maze sleeve assembly 200 are as follows: The labyrinth sleeve assembly 200 comprises, from the inside out, a first cylinder 201, a second cylinder 202, a third cylinder 203, a fourth cylinder 204, and a fifth cylinder 205. These cylinders are collectively fitted around the outside of the pressure-reducing sleeve 100, with adjacent cylinders fitting snugly against each other. The first cylinder 201 is in contact with the outer surface of the pressure-reducing sleeve 100. Each of the first, second, third, fourth, and fifth cylinders has a labyrinthine flow channel corresponding to a pressure-reducing hole 101. All cylinders 201, 202, 204, and 205 are fixedly connected to the pressure-reducing sleeve 100, while the third cylinder 203 is rotatably fitted to the pressure-reducing sleeve 100. Gas flowing out of the pressure-reducing hole 101 passes sequentially through the corresponding hole structures on each cylinder, undergoing multi-stage throttling and redirection during radial flow, thus achieving progressive pressure reduction. The third cylinder 203 can rotate relative to the adjacent cylinders to change the degree of misalignment of the labyrinth flow channel and adjust the airflow resistance.

[0016] Furthermore, the labyrinth sleeve assembly 200 also includes an assembly ring 206, which is bolted to the bottom end of the pressure-reducing sleeve 100. The bottom ends of the first cylinder 201, second cylinder 202, fourth cylinder 204, and fifth cylinder 205 are all fixedly connected to the assembly ring 206, specifically by welding. The assembly ring 206 serves as a bottom positioning component for each fixed cylinder, ensuring the stability of the first cylinder 201, second cylinder 202, fourth cylinder 204, and fifth cylinder 205 and reducing the possibility of displacement under airflow impact. The bolted connection facilitates assembly and disassembly, and also facilitates inspection or replacement of the labyrinth sleeve assembly 200 during later maintenance.

[0017] As one embodiment and not a limitation, the first cylinder 201, second cylinder 202, third cylinder 203, fourth cylinder 204, and fifth cylinder 205 are respectively provided with a first through hole 207, a second through hole 208, a third through hole 209, a fourth through hole 210, and a fifth through hole 211 corresponding to the pressure reducing hole 101. The first through holes 207, 208, 209, 210, and 211 are distributed radially along the labyrinth sleeve assembly 200 and together form a labyrinth flow channel. After the gas flows out from the pressure reducing hole 101, it passes through the first through hole 207, 208, 209, 210, and 211 in sequence before being discharged outward. Both the first through hole 207 and the fifth through hole 211 are circular holes, while the second through hole 208, the third through hole 209, and the fourth through hole 210 are elongated arc-shaped holes extending circumferentially along the corresponding cylinder body. The first through hole 207 is directly opposite the second through hole 208, and the fifth through hole 211 is directly opposite the fourth through hole 210. When the lifting valve core 600 is in the closed position, the third through hole 209 is completely aligned with the second through hole 208 and the fourth through hole 210. When the lifting valve core 600 rises and increases the valve opening, the third cylinder body 203 rotates with the rising action of the lifting valve core 600, causing the circumferential misalignment of the third through hole 209 with the second through hole 208 and the fourth through hole 210 to gradually increase. The elongated arc-shaped hole ensures that the flow channel remains connected when the third cylinder 203 rotates within a certain angle range. At the same time, it adjusts the gas flow resistance by changing the misalignment. The greater the misalignment, the greater the obstruction force on the airflow, which in turn can achieve a better effect of suppressing and reducing the pressure on the airflow.

[0018] As one embodiment and not a limitation, the first cylinder 201, the second cylinder 202, the third cylinder 203, the fourth cylinder 204, and the fifth cylinder 205 are all cylindrical structures made of stainless steel with smooth surfaces, and the wall thickness of each cylinder does not exceed 2 mm. Stainless steel has good corrosion resistance and structural strength, making it suitable for gaseous media flow environments. The smooth surfaces of each cylinder help reduce the frictional resistance when the third cylinder 203 rotates, and the thinner cylinder walls allow the labyrinth sleeve assembly 200 to maintain a compact radial dimension while forming a multi-layer flow channel structure.

[0019] The structure of the transmission assembly 300 is described in detail below: The transmission assembly 300 is connected to the lifting valve core 600 and configured to drive the third cylinder 203 to rotate in response to the lifting action of the lifting valve core 600. Specifically, when the lifting valve core 600 rises and increases the valve opening, the transmission assembly 300 drives the third cylinder 203 to rotate in the resistance-increasing direction, thereby increasing the resistance to gas entering the labyrinth flow channel. Thus, when the valve opening is small, the labyrinth flow channel maintains a large degree of alignment, allowing gas to pass through with relatively low resistance, resulting in smoother gas discharge. As the valve opening gradually increases, the third cylinder 203 rotates with the lifting valve core 600, increasing the degree of flow channel misalignment, thereby increasing flow resistance and enhancing the pressure reduction effect.

[0020] As one embodiment and not a limitation, the pressure-reducing sleeve 100 is a two-section cylindrical shape, with the top section having a thicker wall than the bottom section. The top of the pressure-reducing sleeve 100 has an annular cavity 102 for the insertion of a third cylindrical body 203. A sealing ring 103, which fits tightly against the third cylindrical body 203, is fixedly embedded at the bottom of the annular cavity 102. The sealing ring 103 enhances the airtightness of the annular cavity 102, preventing gas leakage. The upper end of the third cylindrical body 203 extends into the annular cavity 102, and its upper and lower ends respectively contact the inner top of the annular cavity 102 and the mounting ring 206, maintaining a relatively stable rotational state under the limiting effect of the annular cavity 102.

[0021] Furthermore, the inner left and right side walls of the pressure-reducing sleeve 100 are provided with axially arranged sliding openings 104, and the inner walls of the third cylinder 203 are provided with helical drive grooves 212 on opposite sides. The transmission assembly 300 includes two drive columns 301 that are movably inserted into the sliding openings 104, with the ends of the two drive columns 301 respectively embedded in the corresponding drive grooves 212. The sliding openings 104 are used to limit the axial movement of the drive columns 301. When the drive columns 301 move up and down with the lifting valve core 600, the drive columns 301 cooperate with the helical drive grooves 212 to convert linear displacement into rotational motion of the third cylinder 203. The two drive columns 301 are arranged opposite each other, which can make the force on the third cylinder 203 more balanced and reduce the possibility of skew or jamming. Specifically, in this embodiment, the number of turns of the drive groove 212 corresponds to an angle of approximately 10°, that is, 1 / 36 of a turn. When the drive column moves from the bottom end to the top end of the drive groove 212, the third cylinder 203 rotates exactly 10°.

[0022] It should be noted that the transmission assembly 300 also includes a connecting sleeve 302, a connecting rod 303, and displacement blocks 304. The connecting sleeve 302 is threadedly connected to the bottom end of the lifting valve core 600. The two displacement blocks 304 are respectively connected to the connecting sleeve 302 via the two connecting rods 303, and the two displacement blocks 304 are respectively connected to the two drive columns 301. Therefore, the connecting sleeve 302 rises and falls synchronously with the lifting valve core 600, and drives the displacement blocks 304 to move via the connecting rods 303. The displacement blocks 304 then drive the drive columns 301 to move along the sliding port 104. The threaded connection facilitates the assembly between the transmission assembly 300 and the lifting valve core 600, and also facilitates subsequent disassembly and maintenance. Therefore, the drive columns 301 can rise and fall synchronously with the lifting valve core 600.

[0023] Example 2: This application also proposes a sleeve regulating valve, including a valve body 400, a valve cylinder 500, a lifting valve core 600, and the high-pressure differential labyrinth pressure-reducing structure described in Example 1 above. The valve body 400 has an air inlet on its side and an exhaust port at its bottom. The valve cylinder 500 is disposed within the valve body 400, and the lifting valve core 600 is vertically and vertically disposed within the valve cylinder 500. The top end of the pressure-reducing sleeve 100 is bolted to the bottom end of the valve cylinder 500. Gas enters through the air inlet on the side of the valve body 400, enters the valve cylinder 500 when the lifting valve core 600 is opened, then enters the pressure-reducing sleeve 100, and is gradually reduced in pressure by the labyrinth sleeve assembly 200 before being discharged through the exhaust port. The lifting valve core 600 is used to regulate the valve opening and also drives the third cylinder 203 to rotate via the transmission assembly 300, thus linking flow regulation with labyrinth flow channel resistance regulation. At the same time, the bottom of the pressure reducing sleeve 100 is completely inside the exhaust port, meaning that gas can only enter the pressure reducing sleeve 100 through the valve cylinder 500.

[0024] As one embodiment and not a limitation, the top of the valve body 400 is also provided with an electric actuator 700. The output end of the electric actuator 700 is connected to the lifting valve core 600 through the valve stem 800, and is used to drive the lifting valve core 600 to move axially. When the electric actuator 700 drives the lifting valve core 600 to descend to the closed position, the valve flow path is cut off or substantially cut off; when the electric actuator 700 drives the lifting valve core 600 to rise, the valve opening increases, and the transmission assembly 300 synchronously drives the third cylinder 203 to rotate in the direction of increased resistance. This structure eliminates the need for a separate drive source for the third cylinder 203, which helps to simplify the internal structure of the regulating valve.

[0025] Furthermore, the side wall of the valve cylinder 500 is uniformly perforated with several vent holes, and the lifting valve core 600 is sealed to the inner wall of the valve cylinder 500. The vent holes allow gas to enter the valve cylinder 500, and their even distribution ensures relatively balanced circumferential air intake. The lifting valve core 600 can block or open a corresponding number of vent holes at different heights, thereby changing the effective air intake area. As the lifting valve core 600 rises, the gas flow rate increases, while the third cylinder 203 increases the resistance of the labyrinth flow channel.

[0026] In summary, this solution links the lifting action of the riser valve core 600 with the rotation of the third cylinder 203 in the labyrinth sleeve assembly 200, so that changes in valve opening can synchronously cause changes in the degree of misalignment and flow resistance in the labyrinth flow channel, thereby coordinating the valve's flow regulation process with the pressure reduction process. Specifically, when the inlet pressure is high or the system requires rapid pressure relief, the riser valve core 600 rises to increase the valve opening, allowing more gas to enter the pressure reducing sleeve 100 and participate in the discharge; at the same time, the third cylinder 203 rotates in the resistance-increasing direction under the action of the transmission assembly 300, increasing the circumferential misalignment between the third through hole 209 and the second through hole 208 and the fourth through hole 210, such as... Figure 9 As shown, the energy loss of gas increases when it passes through the labyrinth channel, thereby improving the pressure reduction capacity of the labyrinth channel and reducing the possibility of excessively high flow velocity of high-pressure gas when it is discharged at a large opening.

[0027] On the other hand, when the intake pressure is relatively stable or only a small exhaust volume needs to be maintained, the lift valve core 600 can be in a smaller opening position to limit the gas flow into the valve; at this time, the third cylinder 203 is in a position with a small degree of misalignment, such as... Figure 10 The posture shown allows gas to be discharged relatively smoothly through the pressure-reducing structure. Therefore, this design can adaptively adjust the labyrinth flow path resistance according to changes in valve opening, enhancing the pressure-reducing effect under larger discharge volumes and ensuring smooth discharge under smaller discharge volumes, thereby improving the pressure-reducing and discharge stability and adaptability of the sleeve control valve under different pressure conditions.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-pressure differential labyrinth decompression structure, characterized in that, include: A pressure-reducing sleeve is used to connect to the bottom end of a valve cylinder. The pressure-reducing sleeve is a cylindrical shape with an open top, and several pressure-reducing holes are distributed circumferentially at intervals on the bottom of its side wall. A labyrinth sleeve assembly, comprising, from the inside out, a first cylinder, a second cylinder, a third cylinder, a fourth cylinder, and a fifth cylinder, all cylinders being fitted together on the outside of a pressure-reducing sleeve, with adjacent cylinders fitting together. The first cylinder is fitted to the outer surface of the pressure-reducing sleeve. The first, second, third, fourth, and fifth cylinders are all provided with labyrinth flow channels corresponding to the pressure-reducing holes. The first, second, fourth, and fifth cylinders are all fixedly connected to the pressure-reducing sleeve, and the third cylinder is rotatably fitted to the pressure-reducing sleeve. The transmission assembly is connected to the lifting valve core and configured to drive the third cylinder to rotate in response to the lifting action of the lifting valve core. When the lifting valve core rises and increases the valve opening, the transmission assembly can drive the third cylinder to rotate in the resistance-increasing direction to increase the resistance of gas entering the labyrinth flow channel. The first cylinder, the second cylinder, the third cylinder, the fourth cylinder, and the fifth cylinder are respectively provided with a first through hole, a second through hole, a third through hole, a fourth through hole, and a fifth through hole corresponding to the pressure reducing hole. The first through hole, the second through hole, the third through hole, the fourth through hole, and the fifth through hole are distributed in sequence along the radial direction of the labyrinth sleeve assembly and together form the labyrinth flow channel. The first through hole and the fifth through hole are both round holes, and the second through hole, the third through hole and the fourth through hole are all long arc-shaped holes extending along the circumference of the corresponding cylinder. The first through hole is directly opposite the second through hole, and the fifth through hole is directly opposite the fourth through hole. When the lifting valve core is in the closed position, the third through hole is fully aligned with the second through hole and the fourth through hole; When the lifting valve core rises and increases the valve opening, the third cylinder rotates with the rising action of the lifting valve core, causing the circumferential misalignment between the third through hole and the second and fourth through holes to gradually increase.

2. The high-pressure differential labyrinth decompression structure according to claim 1, characterized in that, The labyrinth sleeve assembly also includes an assembly ring, which is fixed to the bottom end of the pressure-reducing sleeve by bolts. The bottom ends of the first cylinder, the second cylinder, the fourth cylinder, and the fifth cylinder are all fixedly connected to the assembly ring.

3. The high-pressure differential labyrinth decompression structure according to claim 1, characterized in that, The top of the pressure-reducing sleeve has an annular cavity for the third cylinder to be embedded in, and a sealing ring that fits tightly against the third cylinder is fixedly embedded at the bottom of the annular cavity.

4. The high-pressure differential labyrinth decompression structure according to claim 3, characterized in that, The inner left and right side walls of the pressure-reducing sleeve are provided with sliding openings arranged along the axial direction, and the inner walls of the third cylinder are provided with spiral drive grooves on opposite sides; the transmission assembly includes two drive columns that are movably inserted into the sliding openings, and the ends of the two drive columns are respectively embedded in the corresponding drive grooves.

5. The high-pressure differential labyrinth decompression structure according to claim 4, characterized in that, The transmission assembly includes a connecting sleeve, a connecting rod, and displacement blocks. The connecting sleeve is threaded to the bottom end of the lifting valve core. The two displacement blocks are respectively connected to the connecting sleeve through two connecting rods, and the two displacement blocks are respectively connected to the two drive columns.

6. The high-pressure differential labyrinth decompression structure according to claim 1, characterized in that, The first, second, third, fourth, and fifth cylinders are all cylindrical structures made of stainless steel with smooth surfaces, and the wall thickness of each cylinder does not exceed 2 millimeters.

7. A sleeve regulating valve, characterized in that, Includes a valve body, a valve cylinder, a lifting valve core, and a high-pressure differential labyrinth pressure reducing structure as described in any one of claims 1 to 6; The valve body has an air inlet on its side and an exhaust port at its bottom. The valve cylinder is disposed inside the valve body, and the lifting valve core is disposed vertically inside the valve cylinder. The top end of the pressure reducing sleeve is connected to the bottom end of the valve cylinder. The top of the valve body is also provided with an electric actuator. The output end of the electric actuator is connected to the lifting valve core through the valve stem, and is used to drive the lifting valve core to move axially.

8. A sleeve regulating valve according to claim 7, characterized in that, The valve cylinder has several vent holes evenly distributed through its side wall, and the lifting valve core is sealed and fitted to the inner wall of the valve cylinder.

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