CN115962185A - High-frequency reversing decompression cylinder for a new split liquid-driven diaphragm compressor - Google Patents

Abstract

The invention discloses a novel high-frequency reversing decompression cylinder for a split type liquid-driven diaphragm compressor, and relates to the technical field of decompression cylinders, wherein the decompression cylinder comprises a movable part and a static part, the static part comprises a low-pressure side cylinder body, a low-pressure side bushing, a screw, a high-pressure side cylinder body, a high-pressure side bushing, an oil injection port and an end cover, and the low-pressure side cylinder body is detachably connected with one end of the high-pressure side cylinder body. Can change specific implementation scheme according to the demand of difference is nimble, and need not redesign cylinder body, effectual research and development cost and the manufacturing cost of having reduced.

Description

High-frequency reversing decompression cylinder for a new split liquid-driven diaphragm compressor

technical field

The invention relates to the technical field of decompression cylinders, in particular to a novel high-frequency reversing decompression cylinder for a split-type liquid-driven diaphragm compressor.

Background technique

The decompression cylinder used in the liquid-driven diaphragm compressor is a hydraulic actuator that converts high-pressure and small-flow hydraulic oil into low-pressure and large-flow hydraulic oil. Restricted by the difficulty of research and development of large displacement hydraulic pumps, research and development costs and manufacturing costs after batches.

In the process of developing liquid-driven diaphragm compressors with different displacements, it is often necessary to redesign the decompression cylinder, which will inevitably consume some design time and cost, and also requires re-test verification. Existing liquid-driven diaphragm compressors often use mature small-displacement hydraulic pumps as pressure sources. Therefore, in order to match the large displacement requirements of the air side of the compressor, the small displacement hydraulic pump needs to use the decompression cylinder as an intermediate mechanism to convert the high pressure and small flow hydraulic oil into large flow hydraulic oil to push the diaphragm in the diaphragm compressor to do work. .

The decompression cylinder used in the liquid-driven diaphragm compressor is a hydraulic actuator that converts high-pressure and small-flow hydraulic oil into low-pressure and large-flow hydraulic oil. When in use, one end of the decompression cylinder is connected to the hydraulic pump, and the other end is connected to the membrane head. . The side connected to the hydraulic pump uses a plunger, and the side connected to the membrane head uses a piston. The cross-sectional area of the piston is larger than that of the plunger. The ratio of the cross-sectional area of the piston to the cross-sectional area of the plunger is called the decompression ratio.

Compressors with different displacements need different decompression ratios. If hydraulic pumps with the same displacement are used for compression, the structure of the plunger on the side connected to the hydraulic pump is completely similar, and the pistons need to be designed with different cross-sectional areas.

At present, the high-pressure plunger and the low-pressure side piston of the decompression cylinder share a cylinder body. After the high-pressure side plunger and the low-pressure side piston are assembled, they are put into the cylinder body together. The low-pressure side cylinder is disassembled and replaced, thereby changing the decompression ratio between the cross-sectional area of the piston and the cross-sectional area of the plunger, and a new cylinder needs to be manufactured, which is costly.

Moreover, if the current decompression cylinder uses a static pressure support structure, the hydraulic oil on the high pressure side may leak to the position of the static pressure support, thereby affecting the effect of the static pressure support. The high pressure side of the decompression cylinder is generally sealed in two ways, one is to use a gray ring for sealing, and the other is to use a gap seal. Both methods have advantages and disadvantages. The use of gray ring seals has small leakage, but the seals are easy to wear, and the additional purchase of seals will increase additional costs. At the same time, using seals to seal the hydraulic oil on the high-pressure side will cause the risk of high oil temperature. The use of gap seals has large leakage, but it can reduce the oil temperature, and at the same time reduce the cost of purchasing seals, and there are no problems such as wear and tear of dynamic seals and limited life. The decompression cylinders of the two sealing methods need to use different decompression cylinder bodies, which cannot be compatible.

From the above, we have designed a new split type liquid drive diaphragm compressor with high frequency reversing decompression cylinder to solve the above problems.

Contents of the invention

The object of the present invention is to solve the shortcomings in the prior art, and propose a novel high-frequency reversing decompression cylinder for a split-type liquid-driven diaphragm compressor.

In order to achieve the above object, the present invention adopts the following technical solutions:

A new high-frequency reversible decompression cylinder for a new type split liquid-driven diaphragm compressor. The decompression cylinder includes a moving part and a stationary part. Cylinder block, high pressure side bushing, oil filler and end cap,

The low-pressure side cylinder is detachably connected to one end of the high-pressure side cylinder, the other end of the high-pressure side cylinder is detachably connected to the end cover, and the low-pressure side bushing is installed on the In the low-pressure side cylinder block, the high-pressure side bushing is installed in the high-pressure side cylinder block by way of interference fit;

The moving part includes a high-pressure side plunger assembly, a low-pressure side piston and a ball head, the low-pressure side piston is installed in the low-pressure side bushing, the high-pressure side plunger assembly is installed in the high-pressure side bushing, and the high-pressure side One end of the plunger assembly is fixedly connected to the ball head, and the other side of the ball head is detachably connected to the low-pressure side piston;

The high-pressure side plunger assembly includes a high-pressure side plunger and a sealing structure installed between the high-pressure side plunger and the high-pressure side cylinder.

Preferably, one end of the cylinder on the low-pressure side is fixedly connected to the cylinder on the high-pressure side by screws, the other end of the cylinder on the low-pressure side is connected to a membrane head by screws, and one end of the cylinder on the high-pressure side is close to the cylinder on the low-pressure side. A first spigot is provided on the side of the end cover, and a second spigot is provided on the side of the end cover close to the high-pressure side cylinder. The connection between the low-pressure side cylinder and the high-pressure side cylinder, the high-pressure side cylinder O-rings are installed at the joints between the ends and the end caps.

Preferably, the interior of the cylinder on the high-pressure side includes a small-diameter hollow structure and a large-diameter hollow structure, the small-diameter hollow structure and the large-diameter hollow structure are connected through each other, and the small-diameter hollow structure is close to one end of the low-pressure side cylinder, The high-pressure side bushing is installed inside the large-aperture hollow structure.

Preferably, the low-pressure side piston moves in the low-pressure side bushing, the high-pressure side plunger moves in the high-pressure side bushing, and the sealing structure includes installing a guide rod bushing inside a small-diameter hollow structure or installing a guide rod bushing in a large-diameter hollow structure. One or more types of gray rings are installed on the outer side of the high-pressure side plunger inside the aperture hollow structure.

Preferably, when the sealing structure is a small-diameter hollow structure with a guide rod bush installed inside, the guide rod bush is installed on the outside of the high-pressure side plunger, and a There is a gap, and a circular oil drain passage is provided inside the high-pressure side cylinder below the guide rod bushing and communicates with the large-aperture hollow structure.

Preferably, when the sealing structure is a gray ring installed on the outside of the high-pressure side plunger inside the large-aperture hollow structure, the small-aperture hollow structure and the outside of the high-pressure side plunger are through structures.

Preferably, a low-pressure side oil drain chamber is arranged in the low-pressure side cylinder body, and a high-pressure side oil drain chamber is arranged in the high-pressure side cylinder body.

Preferably, the moving part further includes a sliding shoe, a sliding shoe gland, a sliding shoe spacer, a gray ring, and a guide belt, and the sliding shoe spacer is installed in the low-pressure side piston through an interference fit. The sliding shoe is installed in the sliding shoe pad, and a gap for the sliding shoe to slide in the sliding shoe pad is provided between the sliding shoe and the sliding shoe pad, and the ball head is connected to the high pressure side plunger through a screw One end is connected, the ball head is installed in the sliding shoe, and the sliding shoe gland is connected with the low-pressure side piston through screws.

Preferably, the low-pressure side cylinder block also includes a one-way valve with a guide rod installed inside the low-pressure side piston, and the one-way valve with a guide rod includes a valve cover, a valve cover, a spring, a valve seat, a valve core, a top Rods, guide bushes, pads, and the pads are installed on the high-pressure side cylinder body.

Preferably, the valve cover, the valve cover and the valve seat are fixedly connected to form the shell structure of the one-way valve, the spring is installed inside the valve seat, and one end of the spring is arranged against the inner side of the valve seat, and the The other end of the spring is connected with the spool, and the other end of the spool is connected with a push rod, and a guide bush is installed on the outside of the push rod and on the inner side of the valve seat.

Compared with prior art, the beneficial effect of the present invention is:

1. To change the decompression ratio of the decompression cylinder in this scheme, it is only necessary to redesign the low-pressure side piston, low-pressure side cylinder, and low-pressure side bushing, while the high-pressure side cylinder, high-pressure side bushing, end cover and plunger can be combined with Same as original plan. This can save more than half of the design time and verification test time, reduce manufacturing costs, and achieve high versatility of parts.

2. In this scheme, the low-pressure side bushing and the high-pressure side bushing can be replaced if they are worn to a certain extent during long-term use. This design can avoid replacing the cylinder body, thereby saving manufacturing cost and maintenance cost.

3. In this scheme, the decompression cylinder realizes the compatibility of the two schemes of high-pressure side plunger using gap seal + guide rod static pressure support and high-pressure side plunger using gray ring seal. The advantage of this approach is that the specific implementation can be flexibly changed according to different needs without redesigning the cylinder body; the cylinder body of the decompression cylinder is the part with the highest manufacturing cost and the longest manufacturing time among all the components of the decompression cylinder; therefore, this The scheme can effectively reduce the research and development cost and the manufacturing cost. At the same time, the use of static pressure support can avoid the influence of hydraulic oil on the high pressure side, and the effect of static pressure support is better.

4. The low-pressure side cylinder also includes a one-way valve with a guide rod installed inside the low-pressure side piston. When the high-pressure side plunger moves to the high-pressure side dead center, the ejector rod contacts the pad installed on the high-pressure side cylinder. , the one-way valve is opened, and the hydraulic oil between the membrane head and the decompression cylinder can leak through the one-way valve at this time, so as to replace the high-temperature hydraulic oil in the system and reduce the oil temperature of the system.

Description of drawings

Fig. 1 is a structural representation of a high-frequency reversing decompression cylinder for a novel split-type liquid-driven diaphragm compressor proposed by the present invention;

Fig. 2 is a sectional view of a high-frequency reversing decompression cylinder for a novel split type liquid-driven diaphragm compressor proposed by the present invention;

3 is a cross-sectional view of Embodiment 2 of a high-frequency reversing decompression cylinder for a novel split-type liquid-driven diaphragm compressor proposed by the present invention;

Fig. 4 is a structural schematic diagram of Embodiment 3 of a high-frequency reversing decompression cylinder for a novel split-type liquid-driven diaphragm compressor proposed by the present invention.

In the figure: 1 High-pressure side plunger assembly, 101 High-pressure side plunger, 2 Low-pressure side piston, 3 Ball head, 4 Low-pressure side cylinder, 5 Low-pressure side bushing, 6 High-pressure side cylinder, 7 High-pressure side bushing, 8 Sliding shoe, 9 Sliding shoe gland, 10 Sliding shoe spacer, 11 End cover, 12 Check valve, 13 Guide rod bushing, 14 Gray ring, 15 Guide belt, 16 First stop, 17 Oil drain channel, 18 low-pressure side drain chamber, 19 high-pressure side drain chamber, 20 pad, 21 valve cover, 22 valve cover, 23 spring, 24 valve seat, 25 valve core, 26 ejector rod, 27 guide bush, 28 oil filling port.

Detailed ways

In order to be easy to understand the technical means, creative features, goals and effects of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them.

The decompression cylinder used in the liquid-driven diaphragm compressor is a hydraulic actuator that converts high-pressure and small-flow hydraulic oil into low-pressure and large-flow hydraulic oil. When in use, one end of the decompression cylinder is connected to the hydraulic pump, and the other end is connected to the membrane head. . The side connected to the hydraulic pump uses a plunger, and the side connected to the membrane head uses a piston. The cross-sectional area of the piston is larger than that of the plunger. The ratio of the cross-sectional area of the piston to the cross-sectional area of the plunger is called the decompression ratio.

Designing compressors with different displacements requires different decompression ratios. If a hydraulic pump with the same displacement is used for compression, the structure of the plunger on the side connected to the hydraulic pump is completely similar, and the piston needs to be designed with different cross-sectional areas. This solution is mainly By disassembling and replacing the low-pressure side cylinder 4 on one side of the hydraulic cylinder, thereby changing the decompression ratio between the cross-sectional area of the piston and the cross-sectional area of the plunger, the purpose of saving more than half of the design time and verification test time is also achieved. It can realize the functions of high versatility of parts.

Embodiment one

Referring to Figure 1-2, a high-frequency reversing decompression cylinder for a new split type liquid-driven diaphragm compressor. The decompression cylinder includes moving parts and stationary parts. The stationary parts include low-pressure side cylinder 4, low-pressure side bushing 5, Screws, high-pressure side cylinder 6, high-pressure side bushing 7, oil filling port 28 and end cover 11, the detachable connection between the low-pressure side cylinder 4 and one end of the high-pressure side cylinder 6, the other end of the high-pressure side cylinder 6 and the end The covers 11 are detachably connected, the low-pressure side bushing 5 is installed in the low-pressure side cylinder 4 through an interference fit, and the high-pressure side bushing 7 is installed in the high-pressure side cylinder 6 through an interference fit;

Wherein, the interior of the high-pressure side cylinder block 6 includes two parts: a small-aperture hollow structure and a large-aperture hollow structure. The diameter of the small-aperture hollow structure is smaller than that of the large-aperture hollow structure, and the small-aperture hollow structure and the large-aperture hollow structure Through connection, the small-diameter hollow structure is close to one end of the low-pressure side cylinder 4, the high-pressure side bushing 7 is installed inside the large-diameter hollow structure, and the outside of the high-pressure side plunger 101 inside the large-diameter hollow structure is installed with a gray ring 14, and the small-diameter hollow The structure and the outer side of the high-pressure side plunger 101 are through structures; when the decompression cylinder works, the low-pressure side piston 2 moves in the low-pressure side bush 5, and the high-pressure side plunger 101 moves in the high-pressure side bush 7. The low-pressure side bushing 5 and the high-pressure side bushing 7 will be worn out during long-term use. If they are worn to a certain extent, the low-pressure side bushing 5 or the high-pressure side bushing 7 can be directly replaced. This design can avoid replacing the entire cylinder body, thereby saving manufacturing cost and maintenance cost.

More specifically, one end of the cylinder 4 on the low-pressure side is fixedly connected to the cylinder 6 on the high-pressure side by screws, the other end of the cylinder 4 on the low-pressure side is connected to the membrane head by screws, and the cylinder 6 on the high-pressure side is close to the cylinder 4 on the low-pressure side. One side of the end cover 11 is provided with a first spigot 16, and the installation accuracy can be improved by cooperating with the first spigot 16 and the low-pressure side cylinder 4; the side of the end cover 11 close to the high-pressure side cylinder 6 is provided with a second spigot, and the end cover 11 cooperates with the cylinder block 6 on the high pressure side through the second spigot. The connection between the low-pressure side cylinder 4 and the high-pressure side cylinder 6, and the connection between the high-pressure side cylinder 6 and the end cover 11 are all installed with O-rings for sealing. The O-rings are made of rubber Manufactured, wherein, the O-ring can be arranged at the first first seam 16 and the second seam at the junction of both sides of the cylinder body 6 on the high pressure side.

When in use, if compressors with different displacements use the same hydraulic pump, it is only necessary to design decompression cylinders with different decompression ratios. The newly designed decompression cylinder only needs to redesign the low-pressure side piston 2, the low-pressure side cylinder body 4, and the low-pressure side bushing 5 to change the decompression ratio, while the high-pressure side cylinder body 6, high-pressure side bushing 7, end cover 11 and The high-pressure side plunger 101 can be the same as the original solution. This can save more than half of the design time and verification test time, and can also achieve high versatility of parts.

The moving parts include a high-pressure side plunger assembly 1, a low-pressure side piston 2 and a ball head 3. The low-pressure side piston 2 is installed in the low-pressure side bushing 5, the high-pressure side plunger assembly 1 is installed in the high-pressure side bushing 7, and the high-pressure side column One end of the plug assembly 1 is fixedly connected to the ball head 3, and the other side of the ball head 3 is detachably connected to the low-pressure side piston 2;

More specifically, the moving parts also include a sliding shoe 8, a sliding shoe gland 9, a sliding shoe pad 10, a gray ring 14, and a guide belt 15. The sliding shoe pad 10 is installed on the low-pressure side piston by interference fit In 2, the sliding shoe 8 is installed in the sliding shoe pad 10, and there is a gap for the sliding shoe 8 to slide in the sliding shoe pad 10 between the sliding shoe 8 and the sliding shoe pad 10, and the sliding shoe 8 can be placed on the sliding shoe pad 10. Sliding in the pad 10, this design can compensate the position deviation of the low-pressure side piston 2 and the high-pressure side plunger 101 during the working process, and prevent the low-pressure side piston 2 and the high-pressure side plunger 101 from being stuck in the cylinder and cannot move;

The ball head 3 is connected with one end of the high-pressure side plunger 101 through a screw, the ball head 3 is installed in the sliding shoe 8, and the sliding shoe gland 9 is connected with the low-pressure side piston 2 through a screw, which can prevent the sliding shoe 8 and the ball head 3 from and the separation of low-pressure side piston 2. The structural design of the ball head 3 and the sliding shoe 8 enables the high-pressure side plunger 101 to have a certain degree of freedom in the rotation angle, plus the aforementioned position compensation, compared with the structure in which the high-pressure side plunger 101 is rigidly connected to the low-pressure side piston 2 , such a design can prevent the movements of the low-pressure side piston 2 and the high-pressure side plunger 101 from interfering with each other, and can also enable the high-pressure side plunger 101 to adjust its motion posture more flexibly, reducing the risk of deflection or failure.

More specifically, the high-pressure side plunger 1 and the ball head 3 are only connected by a screw, which utilizes the characteristic that the high-pressure side plunger 101 is only under pressure during movement, and the screw can prevent the ball head 3 and the high-pressure side plunger from 101 separation, and basically no force during exercise. This design greatly reduces the difficulty of installation, and at the same time, the plunger 101 on the high pressure side and the ball head 3 are connected through a simple clearance fit and a screw so as to not only be able to bear a relatively large load but also ensure a simple and reliable structure.

It should be noted that during the installation process of the decompression cylinder, the low-pressure side piston 2 can be installed in the low-pressure side cylinder 4 first, and then the high-pressure side plunger 101 is installed in the high-pressure side cylinder 6, and then the high-pressure side plunger 101 It is connected with the ball head 3, and finally the ball head 3 is connected with the low-pressure side piston 2. Such an installation method can prevent the plunger on the high-pressure side of 1 from traveling too long in the bush on the high-pressure side to damage the bush during installation.

Embodiment two

As shown in Figure 3, on the basis of Embodiment 1, a guide rod bushing 13 is installed inside the small-diameter hollow structure inside the high-pressure side cylinder body 6, and the high-pressure side plunger 101 is replaced by a gap through the guide rod bushing 13. Sealed high pressure side plunger assembly 1.

Wherein, when the sealing structure is a small-diameter hollow structure, when the guide rod bushing 13 is installed inside, the guide rod bushing 13 is installed outside the high-pressure side plunger 101, and a gap is provided between the high-pressure side plunger 101 and the guide rod bushing 13 , A circular oil drain channel 17 is provided inside the high-pressure side cylinder 6 below the guide rod bushing 13 and communicates with the large-diameter hollow structure.

More specifically, a low-pressure side oil drain chamber 18 is disposed in the low-pressure side cylinder body 4 , and a high-pressure side oil drain chamber 19 is disposed in the high-pressure side cylinder body 6 .

Wherein, according to the embodiment 1, it can be known that the high-pressure side cylinder 6 is divided into two parts by the difference of the inner hole diameter, the part with the smaller hole diameter is used for static pressure support, and the part with the larger hole diameter is used for the movement of the high-pressure side plunger 101 . There is an oil injection port 28 on the high-pressure side cylinder 6, through which hydraulic oil with pressure is introduced into the gap between the high-pressure side plunger 101 and the guide rod bushing 13, so that the high-pressure side plunger 101 Play the role of static pressure support. There is a low-pressure side oil drain chamber 18 in the low-pressure side cylinder body 4 , and a high-pressure side oil drain chamber 19 is arranged in the high-pressure side cylinder body 6 , and the low-pressure side oil drain chamber 18 and the high-pressure side oil drain chamber 19 are connected through a circular oil drain passage 17 . The hydraulic oil used for the static pressure support can leak into the low-pressure side oil drain chamber 18 and the high-pressure side oil drain chamber 19. This design completely separates the high-pressure hydraulic oil on the side of the high-pressure side plunger 101 from the hydraulic oil of the static pressure support. , The hydrostatic bearing is completely unaffected by the high-pressure hydraulic oil on the side of the high-pressure side plunger 101 .

Further, it can be seen from Example 1 and Example 2 that the decompression cylinder realizes the compatibility of the high-pressure side plunger 101 using gap seal + guide rod hydrostatic support and the high-pressure side plunger 101 being sealed with a gray ring 14. . When the guide bushing 13 is not installed in the high-pressure side cylinder 6, the high-pressure side plunger 101 can be sealed with a gray ring 14; when the guide rod bushing 13 is installed in the high-pressure side cylinder 6, the high-pressure The side plunger 101 uses a solution of gap seal + static pressure support of the guide rod. The advantage of this approach is that the specific implementation can be flexibly changed according to different needs without redesigning the cylinder body. The pressure reducing cylinder block is the most expensive and the longest manufacturing part of all the parts of the pressure reducing cylinder. Therefore, this solution can effectively reduce research and development costs and manufacturing costs.

Embodiment three

Because the sealing effect of the gray ring 14 is better, the hydraulic oil leakage between the low-pressure side of the decompression cylinder and the membrane head is less, and the temperature of this part of the hydraulic oil will increase due to the work of the compressed gas. For the situation that the oil temperature of the compressor system is high, it can be solved by the third embodiment.

Referring to Fig. 4, the third embodiment is based on the first embodiment, the low-pressure side cylinder 4 also includes a check valve 12 with a guide rod installed inside the low-pressure side piston 2, and the check valve 12 with a guide rod includes a valve cover 21. Valve cover 22, spring 23, valve seat 24, valve core 25, ejector rod 26, guide bush 27, spacer 20, spacer 20 is installed on the high pressure side cylinder body 6.

More specifically, the valve cover 21, the valve cover 22 and the valve seat 24 are fixedly connected to form the shell structure of the check valve, the spring 23 is installed inside the valve seat 24, and one end of the spring 23 is arranged against the inner side of the valve seat 24 , the other end of the spring 23 is connected with the spool 25, the other end of the spool 25 is connected with a push rod 26, and a guide bush 27 is installed on the outside of the push rod 26 and on the inner side of the valve seat 24. When the plunger on the high-pressure side moves to the dead center on the high-pressure side, the ejector rod 36 contacts the pad 20 installed on the cylinder body 6 on the high-pressure side, and the one-way valve 12 opens. At this time, the hydraulic pressure between the membrane head and the decompression cylinder Oil can leak through the one-way valve 12, so as to replace the high-temperature hydraulic oil in the system and reduce the oil temperature of the system.

More specifically, installing the one-way valve 12 with a guide rod on the low-pressure side piston 2 can also increase the damping of the decompression cylinder and reduce the impact. The specific mechanism is as follows: when the liquid-driven diaphragm compressor sucks air, under the action of the suction pressure, the movable part in the decompression cylinder will move from the low-pressure side to the high-pressure side. When the movable part moves to the dead center of the high-pressure side, When the one-way valve 12 is opened, the hydraulic oil with pressure on the low-pressure side communicates with the oil tank through the oil filling port 28 after the one-way valve 12 is opened. At this time, the pressure of the hydraulic oil will be released, and the force on the entire moving part will be rapidly reduced. In addition, because the hydraulic oil is instantly sprayed from the one-way valve 12, there will be a reverse thrust, and the thrust is applied to the pad 20, thereby playing a role of damping and reducing the impact of the moving parts on the cylinder.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

The basic principles, main features and advantages of the present invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-mentioned embodiments. Without departing from the spirit and scope of the present invention, the present invention also has various changes and improvements, and these changes and improvements all fall into the scope of the present invention. within the scope of protection. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A high-frequency reversing decompression cylinder for a novel split-type liquid-driven diaphragm compressor. The decompression cylinder includes a moving part and a stationary part, and the stationary part includes a low-pressure side cylinder body (4), a low-pressure side bushing (5), screw, high pressure side cylinder block (6), high pressure side bushing (7), oil filling port (28) and end cover (11), characterized in that, The low-pressure side cylinder (4) is detachably connected to one end of the high-pressure side cylinder (6), and the other end of the high-pressure side cylinder (6) is detachably connected to the end cover (11). The low-pressure side bushing (5) is installed in the low-pressure side cylinder (4) through an interference fit, and the high-pressure side bushing (7) is installed in the high-pressure side cylinder (6) through an interference fit; The moving part includes a high-pressure side plunger assembly (1), a low-pressure side piston (2) and a ball head (3), the low-pressure side piston (2) is installed in the low-pressure side bushing (5), and the high-pressure side The plunger assembly (1) is installed in the high-pressure side bushing (7), one end of the high-pressure side plunger assembly (1) is fixedly connected to the ball head (3), and the other side of the ball head (3) is connected to the The low-pressure side piston (2) is detachably connected; The high-pressure side plunger assembly (1) includes a high-pressure side plunger (101) and a sealing structure between the high-pressure side plunger (101) and the high-pressure side cylinder (6). 2. The high-frequency reversing decompression cylinder for a novel split type liquid-driven diaphragm compressor according to claim 1, wherein one end of the low-pressure side cylinder (4) is connected to the high-pressure side cylinder by a screw (6) Fixed connection, the other end of the low-pressure side cylinder (4) is connected with a membrane head through screws, and the side of the high-pressure side cylinder (6) close to the low-pressure side cylinder (4) is provided with a first stop port (16), the end cover (11) is provided with a second spigot near the side of the high-pressure side cylinder (6), the gap between the low-pressure side cylinder (4) and the high-pressure side cylinder (6) O-rings are installed at the joints, the joints between the high-pressure side cylinders (6) and the end covers (11). 3. A new high-frequency reversing decompression cylinder for a novel split-type liquid-driven diaphragm compressor according to claim 1, characterized in that the interior of the high-pressure side cylinder (6) includes a small-diameter hollow structure and a large Aperture hollow structure, the small-aperture hollow structure and large-aperture hollow structure are connected through, the small-aperture hollow structure is close to one end of the low-pressure side cylinder (4), and the high-pressure side bushing (7) is installed on the large-aperture hollow structure internal. 4. A new high-frequency reversing decompression cylinder for a novel split liquid-driven diaphragm compressor according to claim 1, characterized in that the low-pressure side piston (2) moves in the low-pressure side bushing (5) , the high-pressure side plunger (101) moves in the high-pressure side bushing (7), and the sealing structure includes installing a guide rod bushing (13) inside a hollow structure with a small aperture or a high-pressure valve inside a hollow structure with a large aperture. One or more of the gray rings (14) are installed outside the side plunger (101). 5. The high-frequency reversing decompression cylinder for a novel split-type liquid-driven diaphragm compressor according to claim 4, wherein the sealing structure is a small-diameter hollow structure with a guide rod bushing (13 ), the guide rod bushing (13) is installed outside the high-pressure side plunger (101), and there is a gap between the high-pressure side plunger (101) and the guide rod bushing (13). A circular oil drain passage (17) is provided inside the high-pressure side cylinder (6) below the rod bushing (13) and communicates with the large-aperture hollow structure. 6. A novel high-frequency reversing decompression cylinder for a split-type liquid-driven diaphragm compressor according to claim 4, characterized in that the sealing structure is a high-pressure side plunger (101) inside a large-aperture hollow structure When the gray ring (14) is installed on the outside, the small-diameter hollow structure and the outside of the high-pressure side plunger (101) are through structures. 7. The high-frequency reversing decompression cylinder for a novel split-type liquid-driven diaphragm compressor according to claim 6, wherein the low-pressure side cylinder (4) is provided with a low-pressure side oil drain chamber ( 18), the high-pressure side cylinder (6) is provided with a high-pressure side oil drain chamber (19). 8. A novel high-frequency reversing pressure-relief cylinder for a split-type liquid-driven diaphragm compressor according to claim 4, characterized in that the moving parts also include a sliding shoe (8), a sliding shoe gland (9 ), a shoe pad (10), a gray ring (14), and a guide belt (15), the shoe pad (10) is installed in the low-pressure side piston (2) through an interference fit, and the Sliding shoe (8) is installed in the sliding shoe pad (10), is provided with for sliding shoe (8) in the sliding shoe pad (10) between described sliding shoe (8) and sliding shoe pad (10) sliding gap, the ball head (3) is connected with one end of the high pressure side plunger (101) through a screw, the ball head (3) is installed in the sliding shoe (8), and the sliding shoe gland ( 9) Connect with the low-pressure side piston (2) by screws. 9. A new high-frequency reversing decompression cylinder for a novel split-type liquid-driven diaphragm compressor according to claim 7, characterized in that the low-pressure side cylinder (4) also includes a piston (2) mounted on the low-pressure side ) a one-way valve (12) with a guide rod inside, and the one-way valve (12) with a guide rod includes a valve cover (21), a valve cover (22), a spring (23), a valve seat (24), a valve A core (25), a push rod (26), a guide bush (27), and a spacer (20), and the spacer (20) is installed on the high-pressure side cylinder (6). 10. A novel high-frequency reversing decompression cylinder for a split-type liquid-driven diaphragm compressor according to claim 8, characterized in that the valve cover (21), valve cover (22) and valve seat (24 ) is fixedly connected to form the shell structure of the one-way valve, the spring (23) is installed inside the valve seat (24), and one end of the spring (23) is arranged against the inner side of the valve seat (24), and the The other end of spring (23) is connected with spool (25), and the other end of described spool (25) is connected with push rod (26), and the outside of push rod (26) and the inner side of valve seat (24) A guide bushing (27) is installed.

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