Automatic pressure regulating device for diaphragm compressor

Abstract

The utility model discloses a diaphragm compressor automatic pressure regulating device relates to diaphragm compressor technical field, and this device includes gas side valve seat and oil side valve seat, and the gas side valve seat and oil side valve seat are connected through bolt installation, and the oil gas jack rod is installed between the gas side valve seat and oil side valve seat, the air inlet is seted up on the gas side valve seat, and the air inlet is located oil gas jack rod upper end. The utility model discloses through the diaphragm structure design to the axial movement of oil gas jack rod and annular sealing surface dynamic opening and closing replace traditional diaphragm, and the risk of diaphragm fatigue fracture is thoroughly eliminated, when oil side pressure rises, and pressure oil promotes oil gas jack rod to remove, and triggers annular sealing surface quick opening, and pressure oil directional discharge through spiral pressure relief oil channel, and oil side pressure reduces along with it, when the pressure difference recovers to the set range, and spring force drives the jack rod reset, and sealing surface closes, and stops pressure relief, and the process passes through the real -time dynamic balance of gas side pressure, oil side pressure and spring force.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm compressor technology, specifically an automatic pressure regulating device for diaphragm compressors. Background Technology

[0002] As a core piece of equipment in the field of high-pressure gas compression, the reliability of the differential pressure regulation mechanism of diaphragm compressors directly affects the operating efficiency and service life of the equipment. Traditional diaphragm compressors generally adopt a diaphragm-type pressure regulating structure, which separates the oil and gas sides through a flexible diaphragm and relies on a manual regulating valve to control the differential pressure.

[0003] However, diaphragms are prone to fatigue cracks under long-term alternating stress, leading to leakage of oil and gas mixture.

[0004] Based on this, an automatic pressure regulating device for diaphragm compressors is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide an automatic pressure regulating device for a diaphragm compressor to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An automatic pressure regulating device for a diaphragm compressor includes a gas-side valve seat and an oil-side valve seat, which are connected and installed by bolts. An oil-gas push rod is installed between the gas-side valve seat and the oil-side valve seat. The gas-side valve seat has an air inlet located at the upper end of the oil-gas push rod. The oil-side valve seat has an oil inlet located on one side of the oil-gas push rod, and the oil outlet located at the lower end of the oil-gas push rod. A spring is installed between the boss of the oil-gas push rod and the base of the gas-side valve seat.

[0008] Preferably, a first glyph ring is fitted at the contact position between the oil-gas push rod and the gas-side valve seat, and a second glyph ring is fitted at the contact position between the oil-gas push rod and the oil-side valve seat.

[0009] Preferably, the inner diameters of the first and second Gladius rings are interference-fitted with the outer diameter of the oil-gas push rod to form a high-pressure sealing lip structure.

[0010] Preferably, the first and second Gladge rings are made of polytetrafluoroethylene.

[0011] Preferably, an O-ring is provided between the gas-side valve seat and the oil-side valve seat.

[0012] Preferably, the oil-gas push rod has a pressure relief oil passage inside.

[0013] Preferably, an annular sealing surface is provided between the oil-gas push rod and the oil-side valve seat.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This utility model, through a diaphragmless structure design, replaces the traditional diaphragm with the axial movement of the oil-gas push rod and the dynamic opening and closing of the annular sealing surface, completely eliminating the risk of diaphragm fatigue fracture. When the oil-side pressure increases, the pressurized oil pushes the oil-gas push rod to move, triggering the rapid opening of the annular sealing surface. The pressurized oil is discharged directionally through the spiral pressure relief oil channel, and the oil-side pressure decreases accordingly. When the pressure difference returns to the set range, the spring force drives the push rod to return to its position, the sealing surface closes, and the pressure relief stops. This process achieves real-time dynamic balance between the gas-side pressure, the oil-side pressure, and the spring force.

[0016] 2. This utility model, through its adjustable spring stiffness design, allows for the replacement of springs with different preload forces or stiffnesses on-site, adapting to the compression requirements of different gas media such as hydrogen, nitrogen, and natural gas. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure label annotations: 1. Gas side valve seat; 2. Oil side valve seat; 3. Bolt; 4. Oil-gas push rod; 5. O-ring; 6. Spring; 7. Glyd ring one; 8. Glyd ring two; 9. Annular sealing surface; 10. Oil inlet; 11. Oil drain port; 12. Air inlet. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] In one embodiment, such as Figure 1 As shown, an automatic pressure regulating device for a diaphragm compressor includes a gas-side valve seat 1 and an oil-side valve seat 2. The gas-side valve seat 1 and the oil-side valve seat 2 are connected and installed by bolts 3. An oil-gas push rod 4 is installed between the gas-side valve seat 1 and the oil-side valve seat 2. An air inlet 12 is provided on the gas-side valve seat 1, and the air inlet 12 is located at the upper end of the oil-gas push rod 4. An oil inlet 10 and an oil drain 11 are provided on the oil-gas push rod 2. The oil inlet 10 is located on one side of the oil-gas push rod 4, and the oil drain 11 is located at the lower end of the oil-gas push rod 4. A spring 6 is installed between the boss of the oil-gas push rod 4 and the base of the gas-side valve seat 1.

[0021] In this embodiment, the preload force of spring 6 sets the pressure difference between the oil and gas base; when the oil side pressure is greater than the gas side pressure plus the spring force, the oil-gas push rod 4 moves downward, and the oil is discharged from the drain port 11 through the pressure relief oil passage, and the oil pressure decreases; when the oil side pressure is less than or equal to the gas side pressure plus the spring force, the oil-gas push rod 4 returns to its original position, and the oil discharge stops.

[0022] In an optional embodiment, a Glyd ring 7 is fitted at the contact position between the oil-gas push rod 4 and the gas-side valve seat 1, and a Glyd ring 8 is fitted at the contact position between the oil-gas push rod 4 and the oil-side valve seat 2.

[0023] It should be noted that the air-side Glyd ring 7 prevents high-pressure gas from entering the oil side, and the oil-side Glyd ring 8 prevents hydraulic oil from seeping into the air side. This isolation mechanism is a key prerequisite for maintaining a stable oil-gas pressure difference.

[0024] In an optional embodiment, the inner diameters of the first Gladius ring 7 and the second Gladius ring 8 are interference-fitted with the outer diameter of the oil-gas push rod 4 to form a high-pressure sealing lip structure.

[0025] It should be noted that under pressure, the lip edge elastically deforms and fits against the surface of the push rod, forming a dynamic seal.

[0026] In an optional embodiment, the first Gladley ring 7 and the second Gladley ring 8 are made of polytetrafluoroethylene.

[0027] It should be noted that polytetrafluoroethylene (PTFE) can resist the chemical corrosion of hydrogen, nitrogen, and compressor oil; and PTFE has a certain degree of self-lubrication, which can reduce the sliding energy consumption of the oil-gas push rod 4.

[0028] In an optional embodiment, an O-ring 5 is provided between the gas-side valve seat 1 and the oil-side valve seat 2.

[0029] It should be noted that the O-ring 5, as an auxiliary seal, is installed in the annular groove of the valve seat mating surface. On the one hand, it can block the tiny gaps in the valve seat mating surface to prevent oil and gas mixing; on the other hand, it can absorb the vibration energy of the compressor during operation and reduce the risk of seal failure.

[0030] In an optional embodiment, the oil-gas push rod 4 has a pressure relief oil passage inside.

[0031] It should be noted that the pressure relief oil passage is designed as a spiral flow channel to guide the high-pressure oil from the oil drain port 11 of the oil-side valve seat 2, thereby preventing the oil from impacting other sealing surfaces.

[0032] In an optional embodiment, an annular sealing surface 9 is provided between the oil-gas push rod 4 and the oil-side valve seat 2.

[0033] It should be noted that the annular sealing surface 9 adopts an end-face sealing design. When the oil pressure exceeds the set pressure difference, the push rod 4 moves to separate the sealing surface 9. After the pressure is released, it automatically closes by the force of the spring 6.

[0034] The above embodiment discloses an automatic pressure regulating device for a diaphragm compressor, wherein the preload force of the spring 6 sets the basic oil-gas pressure difference, the annular sealing surface 9 is closed, and there is no oil leakage; when the oil side pressure is greater than the gas side pressure plus the spring force, the oil-gas push rod 4 moves downward, opens the annular sealing surface 9, and the oil is discharged from the oil drain port 11 through the pressure relief oil passage, and the oil pressure decreases; when the oil side pressure is less than or equal to the gas side pressure plus the spring force, the oil-gas push rod 4 returns to its original position, and oil leakage stops.

[0035] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An automatic pressure regulating device for a diaphragm compressor, characterized in that, It includes a gas-side valve seat (1) and an oil-side valve seat (2), which are connected and installed by bolts (3). An oil-gas push rod (4) is installed between the gas-side valve seat (1) and the oil-side valve seat (2). An air inlet (12) is provided on the gas-side valve seat (1) and the air inlet (12) is located at the upper end of the oil-gas push rod (4). An oil inlet (10) and an oil drain (11) are provided on the oil-side valve seat (2). The oil inlet (10) is located on one side of the oil-gas push rod (4) and the oil drain (11) is located at the lower end of the oil-gas push rod (4). A spring (6) is installed between the boss of the oil-gas push rod (4) and the base of the gas-side valve seat (1).

2. The automatic pressure regulating device for a diaphragm compressor according to claim 1, characterized in that, A first glyph (7) is fitted at the contact position between the oil-gas push rod (4) and the gas-side valve seat (1), and a second glyph (8) is fitted at the contact position between the oil-gas push rod (4) and the oil-side valve seat (2).

3. The automatic pressure regulating device for a diaphragm compressor according to claim 2, characterized in that, The inner diameters of the first (7) and the second (8) of the glyph are interference-fitted with the outer diameter of the oil and gas push rod (4) to form a high-pressure sealing lip structure.

4. The automatic pressure regulating device for a diaphragm compressor according to claim 2, characterized in that, The first (7) and the second (8) of the Gladius ring are made of polytetrafluoroethylene.

5. The automatic pressure regulating device for a diaphragm compressor according to claim 1, characterized in that, An O-ring (5) is provided between the gas-side valve seat (1) and the oil-side valve seat (2).

6. The automatic pressure regulating device for a diaphragm compressor according to claim 1, characterized in that, The oil-gas push rod (4) has a pressure relief oil passage inside.

7. The automatic pressure regulating device for a diaphragm compressor according to claim 1, characterized in that, An annular sealing surface (9) is provided between the oil and gas push rod (4) and the oil-side valve seat (2).

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