Miniature liquid-driven diaphragm compressor

Abstract

The utility model relates to the technical field of diaphragm compressors, in particular to a miniature liquid-driven diaphragm compressor which comprises a driving assembly, a diaphragm head assembly and a reversing assembly, the driving assembly is perpendicular to the ground, and the driving assembly comprises a plunger pump and a driving unit used for driving the plunger pump; the driving unit is arranged above the membrane head assembly, and the axis direction of the driving unit and the axis direction of the plunger pump are perpendicular to the axis of the membrane head assembly. The reversing assembly comprises a reversing valve, the plunger pump is connected with the membrane head assembly through the reversing valve, and the reversing valve is used for alternately leading high-pressure oil output by the plunger pump into the membrane head assembly to do work so as to compress gas in the membrane head assembly. According to the diaphragm compressor, the driving assembly is installed perpendicular to the ground, the space height is utilized, and the occupied area of the diaphragm compressor is reduced; and the plunger pump is tightly connected with the reversing valve through the oil path block, so that an efficient oil transmission path is formed, a hydraulic flow channel is shortened, and the performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm compressors, in particular to a miniature liquid-driven diaphragm compressor. Background Art

[0002] At present, diaphragm compressors have been widely used in food, petroleum, aerospace, medicine, chemistry and other industrial fields.

[0003] Traditional diaphragm compressors usually use a motor to drive a connecting rod structure through a crank to push a piston to generate high-pressure hydraulic oil. The high-pressure hydraulic oil is located on one side of the diaphragm. When the piston of the diaphragm compressor works, the high-pressure oil pushes the diaphragm to compress the gas on the other side of the diaphragm. Traditional diaphragm compressors are equipped with a relatively complex crankshaft connecting rod and piston structure, which takes up space, has a complex design, and is prone to wear and tear, such as the Chinese invention patent with patent publication number CN107829921A.

[0004] In order to solve the technical problems of traditional diaphragm compressors, liquid-driven diaphragm compressors have emerged in recent years. For example, the Chinese patent with patent publication number CN210686249U discloses a diaphragm compressor that uses a hydraulic pump and a reversing valve to replace the complex transmission components and piston assemblies such as the crankshaft, connecting rod, and crosshead in the existing diaphragm compressor. The structure is simple and compact, avoiding the wear of mechanical transmission components, piston rings, etc., extending the service life of the diaphragm compressor, and also avoiding the design problems of crankshaft seals and piston seals.

[0005] Although the existing liquid-driven diaphragm compressor has a relatively compact structure, for the integrated hydrogen production and hydrogenation skid, there is still the problem that the entire machine occupies too large an area. Utility Model Content

[0006] The utility model provides a miniature liquid-driven diaphragm compressor to solve the technical problem that the layout of the existing liquid-driven diaphragm compressor occupies a large area.

[0007] In order to solve the above problems, the utility model provides a miniature liquid-driven diaphragm compressor, which adopts the following technical solutions:

[0008] A miniature liquid-driven diaphragm compressor, comprising a drive assembly, a diaphragm head assembly, and a reversing assembly, wherein the drive assembly is arranged perpendicular to the ground.

[0009] The driving assembly includes a plunger pump and a driving unit for driving the plunger pump; the driving unit is arranged above the membrane head assembly, and the axial directions of the driving unit and the plunger pump are perpendicular to the axial direction of the membrane head assembly;

[0010] The reversing assembly includes a reversing valve, and the plunger pump is connected to the diaphragm head assembly via the reversing valve. The reversing valve is used to alternately direct the high-pressure oil output by the plunger pump into the diaphragm head assembly to perform work, so as to compress the gas in the diaphragm head assembly.

[0011] The diaphragm compressor uses a plunger pump to provide a pressure source for the reversing valve, realizes the reversal of high-pressure oil through the reversing valve, and drives the diaphragm in the diaphragm head assembly to compress the gas. By setting the drive assembly perpendicular to the ground, the vertical space can be maximized and the floor space can be reduced, which is especially suitable for application scenarios with limited space; and the drive unit is set above the diaphragm head assembly, and the axial direction of the drive unit and the plunger pump is perpendicular to the axis of the diaphragm head assembly. This layout not only saves horizontal space, but also simplifies the transmission path, reduces energy loss, and improves efficiency.

[0012] As a preferred technical solution of the utility model, the drive unit is arranged on a mounting bracket. The arrangement of the mounting bracket has the following beneficial effects: 1. It provides a solid support for the drive unit, ensures the stability of the drive unit during operation, and reduces the risk of displacement or damage caused by vibration or external force; 2. Through the mounting bracket, the drive unit can be flexibly positioned in a suitable position, whether it is perpendicular to the ground or adjacent to other components, and can be adjusted according to the actual space layout requirements; 3. It is convenient for disassembly and installation of the drive unit, reducing the difficulty of maintenance and overhaul, without large-scale disassembly of the entire compressor system, and improving maintenance efficiency; 4. It helps to realize the compact integration of the drive unit with other components such as the plunger pump and the membrane head assembly, reducing additional connectors and simplifying the overall structure; 5. It improves the heat dissipation conditions of the drive unit and extends its service life.

[0013] As a preferred technical solution of the utility model, the drive unit is connected to the plunger pump via a coupling. The coupling helps to maintain the precise alignment of the drive unit and the plunger pump axis, ensuring a stable connection between the two even in the case of long-term operation or temperature changes, avoiding additional wear and vibration caused by misalignment; and the coupling can efficiently transmit torque, ensuring that the output power of the drive unit can be transmitted to the plunger pump almost losslessly, reducing energy loss during power transmission.

[0014] As a preferred technical solution of the utility model, a driving wheel is fixedly arranged between the coupling and the plunger pump; the valve core of the reversing valve is connected to a right-angle reducer, and a driven wheel is fixedly connected to the other end of the right-angle reducer, and a belt is sleeved between the driven wheel and the driving wheel. The reversing valve is driven by connecting to the driving unit through a right-angle reducer and a belt transmission, which shortens the distance between the driving assembly and the diaphragm head assembly, improves the energy transmission efficiency, and improves the performance of the diaphragm compressor.

[0015] As a preferred technical solution of the utility model, it also includes an oil tank assembly, which is connected to the diaphragm head assembly, the plunger pump and the reversing valve through an oil circuit system, and the oil circuit system includes an oil circuit pipe and an oil circuit block, and the oil circuit block is a metal integral part with a flow channel inside. As a storage unit for oil, the oil tank assembly is responsible for providing clean and sufficient oil supply to ensure the normal operation of the compressor system.

[0016] As a preferred technical solution of the utility model, the outlet of the plunger pump is connected to the reversing valve through the oil block. A precision flow channel is provided inside the oil block, and the outlet of the plunger pump is directly connected to the reversing valve through the oil block. This direct connection method reduces the bends and connectors in the oil transmission path, reduces the resistance to oil flow, and improves the efficiency and response speed of oil transmission.

[0017] As a preferred technical solution of the utility model, the number of membrane heads in the membrane head assembly is 2, and the two membrane heads are arranged on the left and right sides of the membrane head assembly. The design of double membrane heads helps to balance the load of the plunger pump and the reversing valve. The two membrane heads work alternately, which reduces the load of a single membrane head under high pressure, prolongs the service life of the membrane head, and also reduces the vibration and noise of the whole equipment.

[0018] As a preferred technical solution of the utility model, the reversing valve is a two-position four-way valve.

[0019] The beneficial effects are:

[0020] 1. The layout is more flexible, and the disassembly and maintenance are convenient: the utility model adopts a modular design, and the diaphragm compressor is divided into four component modules, namely the drive component, the membrane head component, the reversing component, and the oil tank component. The modular design is convenient for assembly, improves production efficiency, and is convenient for disassembly and maintenance;

[0021] 2. Small footprint: A vertical stacking layout is adopted. The drive assembly is installed vertically on the ground and arranged in a "cross" pattern with the axis of the membrane head assembly. The space height is utilized instead of the plane area. The drive assembly is arranged vertically to reduce the footprint of the diaphragm compressor.

[0022] 3. Shortened hydraulic flow path and improved performance: The plunger pump and the reversing valve are closely connected through the oil block, forming an efficient oil transmission path, shortening the hydraulic flow path, reducing the size of the oil block, saving costs while improving energy transfer efficiency and performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0024] Figure 1 It is a structural schematic diagram of a miniature liquid-driven diaphragm compressor;

[0025] Figure 2 is a schematic diagram of the structure of the drive component;

[0026] Figure 3 It is a structural schematic diagram of the reversing component;

[0027] Figure 4 It is a schematic diagram of the structure of the drive assembly, the membrane head assembly and the reversing assembly;

[0028] Figure 5 for Figure 4 Schematic diagram of the structure from another perspective.

[0029] Description of reference numerals:

[0030] 1. Drive assembly; 101. Drive unit; 102. Plunger pump; 103. Mounting bracket; 104. Coupling; 105. Driving wheel; 106. Pump outlet block; 2. Diaphragm head assembly; 3. Reversing assembly; 301. Reversing valve; 302. Right-angle reducer; 303. Driven wheel; 4. Oil tank assembly; 5. Base. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] At present, integrated hydrogen production and hydrogenation skids are a trend, requiring diaphragm compressors to be as small and lightweight as possible and easy to maintain, especially the floor space needs to be as small as possible. In existing liquid-driven diaphragm compressors, the motor output shaft is parallel to the axis of the membrane head assembly (that is, the motor is arranged parallel to the ground), and the structure is relatively compact, but this layout does not have much advantage in terms of floor space. Therefore, the utility model proposes a type of miniature liquid-driven diaphragm compressor layout, in which the motor is arranged perpendicular to the ground and is directly connected to the plunger pump through a coupling, serving as the driving unit of the entire system. This layout not only reduces the floor space of the compressor, but also greatly utilizes the three-dimensional space, and the modularization degree between the various components of the diaphragm compressor is relatively high, which greatly facilitates the maintenance of parts.

[0033] After introducing the basic principle of the utility model, various non-limiting embodiments of the utility model are specifically introduced below. Any number of elements in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0034] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0035] Embodiment 1:

[0036] like Figure 1 A miniature liquid-driven diaphragm compressor shown includes a drive assembly 1, a diaphragm head assembly 2, a reversing assembly 3, and an oil tank assembly 4, wherein the drive assembly 1 is arranged vertically to the ground;

[0037] like Figure 2 As shown, the driving assembly 1 includes a plunger pump 102 and a driving unit 101 for driving the plunger pump 102; the driving unit 101 is arranged on a mounting bracket 103 and located above the membrane head assembly 2, and the plunger pump 102 is arranged below the driving unit 101, and the axial directions of the driving unit 101 and the plunger pump 102 are perpendicular to the axial direction of the membrane head assembly 2;

[0038] The diaphragm assembly 2 includes a diaphragm, which divides the cavity of the diaphragm assembly 2 into an air cavity and an oil cavity, and the air cavity and the oil cavity are connected to the oil cavity through an air circuit system respectively; since this is a conventional setting of the prior art, it will not be described in detail;

[0039] The reversing assembly 3 includes a reversing valve 301, through which the plunger pump 102 is connected to the oil chamber of the diaphragm head assembly 2. The reversing valve 301 is used to alternately direct the high-pressure oil output by the plunger pump 102 to the diaphragm of the diaphragm head assembly 2 to perform work, thereby compressing the gas in the gas chamber;

[0040] The oil tank assembly 4 is connected to the oil chamber of the membrane head assembly 2, the plunger pump 102 and the reversing valve 301 through an oil circuit system.

[0041] In this embodiment, the driving unit 101 is a motor. Of course, in other embodiments, the driving unit 101 may also be a hydraulic driving unit 101, such as a diesel engine.

[0042] The oil circuit system includes an oil circuit pipe and an oil circuit block. The oil circuit block is a high-pressure resistant metal integrated part with a flow channel inside. The oil circuit block is machined and can withstand high pressure. High-pressure oil flows in the flow channel inside the oil circuit block, and the oil circuit block withstands the high pressure. In this example, the oil circuit block is an integrated part made of carbon steel.

[0043] The outlet of the plunger pump 102 is connected to the reversing valve 301 through an oil circuit block, which is a pump outlet block 106. The oil circuit block replaces the oil circuit pipe, and the oil circuit block bears the high-pressure pulsating hydraulic oil, which improves the reliability of the oil circuit system and avoids the loosening and failure of the oil pipe joint due to the pulsation of the hydraulic oil.

[0044] The reversing valve 301 is directly mounted on the diaphragm head assembly 2, and the flow channel of the oil-side diaphragm head is directly connected to the working port of the reversing valve, thereby ensuring that the high-pressure oil can be accurately guided into the oil chamber of the diaphragm head assembly according to the switching of the reversing valve to achieve gas compression.

[0045] The utility model adopts a modular design, and divides the diaphragm compressor into four component modules, namely, a drive component 1, a diaphragm head component 2, a reversing component 3, and an oil tank component 4. The modular design facilitates assembly, improves production efficiency, and is convenient for disassembly and maintenance. By installing the motor and the plunger pump 102 perpendicular to the ground and setting them in a "cross" with the axis of the diaphragm head component 2, this layout reduces the footprint of the diaphragm compressor, improves space utilization, and solves the problems of large footprint, low modularization, and inconvenient maintenance. At the same time, the plunger pump 102 is directly connected to the reversing valve 301 through the oil circuit block, which not only saves space, but also more effectively reduces the failure rate of the compressor and improves the reliability of the compressor. The drive unit 101 is arranged on the mounting bracket 103 and is located above the diaphragm head assembly 2. The plunger pump 102 is arranged below the drive unit 101. The plunger pump 102 is connected to the oil chamber of the diaphragm head assembly 2 through the reversing valve 301. This arrangement significantly shortens the distance between the drive unit 101 and the diaphragm head assembly 2, shortens the hydraulic (high-pressure oil) flow channel, reduces the size of the oil circuit block, saves costs, and improves the energy transfer efficiency and performance.

[0046] Embodiment 2:

[0047] The main difference between it and Example 1 is:

[0048] In this embodiment, if Figure 1-2 As shown, the membrane head assembly 2 , the reversing assembly 3 , the oil tank assembly 4 and the mounting bracket 103 are arranged on the base 5 ; and the driving assembly 1 is arranged perpendicular to the base 5 .

[0049] The rotating shaft of the driving unit 101 is connected to the plunger pump 102 via a coupling 104 , and the plunger pump 102 is vertically arranged below the driving unit 101 .

[0050] A driving wheel 105 is fixedly arranged between the coupling 104 and the plunger pump 102; the valve core of the reversing valve 301 is connected to one end of the right-angle reducer 302, and the other end of the right-angle reducer 302 is fixedly connected to a driven wheel 303, and a belt is sleeved between the driven wheel 303 and the driving wheel 105. The reversing valve 301 is driven by connecting to the motor through the right-angle reducer 302 and the belt transmission (such as Figure 3-5 shown).

[0051] In this embodiment, the number of membrane heads in the membrane head assembly 2 is two, and the two membrane heads are arranged on the left and right sides of the membrane head assembly 2. The reversing valve 301 is a two-position four-way valve.

[0052] The oil tank assembly 4 includes a tank body, on which a filter and a liquid level and liquid temperature gauge are arranged. The filter is used to filter impurities from the oil returning to the tank body to maintain the cleanliness and oil quality in the tank body. The liquid level and liquid temperature gauge is used to accurately monitor the temperature and liquid level of the liquid in the tank body to ensure the safety and stability of the production process.

[0053] It should be noted that the system schematic diagram of the micro liquid-driven diaphragm compressor can refer to the Chinese patent publication number CN216198873U, and the patent name is a new type of high-pressure diaphragm compressor.

[0054] The micro liquid-driven diaphragm compressor also includes an electric control system. Since this part has the same structure as the existing liquid-driven diaphragm compressor, it will not be described in detail in this embodiment.

[0055] The installation steps of the diaphragm compressor are as follows:

[0056] Step 1: Install the reversing assembly 3 on the membrane head assembly 2 by screws, and then install it on the base 5;

[0057] Step 2: vertically assemble the drive assembly 1 on the base 5 through the mounting bracket 103, and connect the pump outlet block 106 to the reversing valve 301 through screws; at the same time, connect the driving wheel 105 and the driven wheel 303 through a synchronous belt, so that the motor drives the reversing valve 301;

[0058] Step 3: Connect the fuel tank assembly 4 to the base 5;

[0059] Step 4: Connect the oil system, gas system and electronic control system.

[0060] Working principle: When the micro liquid-driven diaphragm compressor is in operation, the motor directly drives the pump shaft of the plunger pump 102 to rotate, providing a pressure source for the system, and then realizes hydraulic reversal through the reversing valve 301. The outlet of the plunger pump 102 is connected to the oil chamber, and the plunger pump 102 pressurizes the hydraulic oil, pushing the diaphragm to realize the functions of compressing gas and exhausting gas; after the reversing valve 302 is reversed, the oil chamber is connected to the inlet of the plunger pump 102. When the oil pressure drops below the intake pressure, the intake valve opens to realize intake, and then the intake pressure pushes the diaphragm to make the oil return from the oil chamber flow to the inlet of the plunger pump 102, realizing the pressure relief and oil discharge of the hydraulic oil. This cycle repeats itself, and the diaphragm compressor works continuously.

[0061] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "left", "right", etc., which indicate orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0062] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A miniature liquid-driven diaphragm compressor, comprising a drive assembly (1), a diaphragm head assembly (2), and a reversing assembly (3), characterized in that: The drive assembly (1) is arranged perpendicular to the ground, and comprises a plunger pump (102) and a drive unit (101) for driving the plunger pump (102); the drive unit (101) is arranged above the membrane head assembly (2), and the axial directions of the drive unit (101) and the plunger pump (102) are perpendicular to the axial direction of the membrane head assembly (2); The reversing assembly (3) comprises a reversing valve (301), and the plunger pump (102) is connected to the diaphragm head assembly (2) via the reversing valve (301). The reversing valve (301) is used to alternately direct the high-pressure oil output by the plunger pump (102) into the diaphragm head assembly (2) to perform work, so as to compress the gas in the diaphragm head assembly (2).

2. A miniature liquid-driven diaphragm compressor according to claim 1, characterized in that: The driving unit (101) is arranged on a mounting bracket (103).

3. A miniature liquid-driven diaphragm compressor according to claim 2, characterized in that: The driving unit (101) is connected to the plunger pump (102) via a coupling (104).

4. A miniature liquid-driven diaphragm compressor as claimed in claim 3, characterized in that: A driving wheel (105) is fixedly arranged between the coupling (104) and the plunger pump (102); the valve core of the reversing valve (301) is connected to the right-angle reducer (302), and the other end of the right-angle reducer (302) is fixedly connected to a driven wheel (303), and a belt is sleeved between the driven wheel (303) and the driving wheel (105).

5. A miniature liquid-driven diaphragm compressor according to any one of claims 1 to 4, characterized in that: It also includes an oil tank assembly (4), which is connected to the diaphragm head assembly (2), the plunger pump (102) and the reversing valve (301) through an oil circuit system. The oil circuit system includes an oil circuit pipe and an oil circuit block. The oil circuit block is a metal integral part with a flow channel inside.

6. A miniature liquid-driven diaphragm compressor as claimed in claim 5, characterized in that: The outlet of the plunger pump (102) is connected to the reversing valve (301) through the oil circuit block.

7. A miniature liquid-driven diaphragm compressor as claimed in claim 6, characterized in that: The number of membrane heads in the membrane head assembly (2) is two, and the two membrane heads are arranged on the left and right sides of the membrane head assembly (2).

8. A miniature liquid-driven diaphragm compressor as claimed in claim 7, characterized in that: The reversing valve (301) is a two-position four-way valve.

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