Pneumatic pressure regulating device for diaphragm compressor

Abstract

The utility model discloses a pneumatic pressure regulating device for a diaphragm compressor, which relates to the technical field of diaphragm compressors and comprises an overflow valve, a pneumatic motor, a three-position four-way reversing valve and a needle valve. The pneumatic motor is installed on the installation frame, an output shaft of the pneumatic motor is connected with an adjusting rod of the overflow valve through a coupler, a port A in the three-position four-way reversing valve is connected with an air inlet of the pneumatic motor through a first air pipe, and a port B in the three-position four-way reversing valve is connected with an air outlet of the pneumatic motor through a second air pipe. A port C of the three-position four-way reversing valve is connected to an air source through an air pipe III, and a needle valve is installed on the air pipe III. The valve position of the three-position four-way reversing valve can be shifted for adjustment according to the reading of the oil discharge pressure gauge, an operator does not need to repeatedly return to the positions of the instrument stand and the cylinder head pressure regulating valve, the adjustment efficiency is improved, and time and labor are saved.

Description

Technical Field

[0001] This utility model relates to the technical field of diaphragm compressors, and specifically to a pneumatic pressure regulating device for diaphragm compressors. Background Technology

[0002] A diaphragm compressor mainly consists of a housing, cylinder head, transmission components, air, oil, and water piping systems, instrumentation, and chassis. The diaphragm inside the cylinder head compresses the gas through periodic hydraulic pressure. This requires the oil discharge pressure in the cylinder head oil chamber to be 5% to 25% higher than the gas discharge pressure in the cylinder head gas chamber, but the oil-gas pressure difference must not be less than 0.3 MPa or greater than 1.5 MPa. The pressure regulating valve, a dedicated hydraulic valve for adjusting the oil discharge pressure in the cylinder head oil chamber, is a crucial component for achieving this function. The regulating valve's adjustment accuracy, operational stability, and ease of use directly determine the accuracy of the hydraulic pressure and the overall operating efficiency.

[0003] Currently, the pressure regulating valve for diaphragm compressors is manually adjusted. When adjusting the oil pressure, the pressure regulating valve handle must be turned at the cylinder head position. Because the pressure regulating valve at the compressor cylinder head is far from the pressure gauge, and during compressor commissioning and initial start-up, the overall equipment instability necessitates frequent oil pressure adjustments. This requires operators to repeatedly move back and forth between the instrument panel and the cylinder head pressure regulating valve for adjustment and monitoring, severely impacting operational efficiency and posing certain safety hazards. Summary of the Invention

[0004] The purpose of this invention is to provide a pneumatic pressure regulating device for a diaphragm compressor to overcome the above-mentioned defects in the prior art.

[0005] A pneumatic pressure regulating device for a diaphragm compressor includes an overflow valve, a pneumatic motor, a three-position four-way reversing valve, and a needle valve. The overflow valve is connected to a cylinder head assembly and has a mounting bracket. The pneumatic motor is mounted on the mounting bracket, and its output shaft is connected to the adjusting rod of the overflow valve via a coupling. Port A of the three-position four-way reversing valve is connected to the air inlet of the pneumatic motor via an air pipe one. Port B of the three-position four-way reversing valve is connected to the air outlet of the pneumatic motor via an air pipe two. Port C of the three-position four-way reversing valve is connected to an air source via an air pipe three, and a needle valve is installed on the air pipe three.

[0006] Preferably, the mounting bracket includes an inner plate, connecting columns, and an outer plate. The inner plate is disposed on the overflow valve, and connecting columns are evenly distributed at the four corners of the inner plate. The same outer plate is disposed on the four connecting columns.

[0007] Preferably, the connecting column is fixed to the outer plate by a nut threaded to its outer end.

[0008] Preferably, a pressure reducing valve is installed between the needle valve and the three-position four-way reversing valve in the trachea.

[0009] Preferably, the pressure reducing valve is a filter pressure reducing valve.

[0010] The beneficial effects achieved by this utility model are as follows:

[0011] The three-position four-way directional valve of this application is installed on the instrument rack. It can remotely control the pneumatic motor through air pipe one and air pipe two, and can remotely connect to the air source through air pipe three. When adjusting the oil discharge pressure of the cylinder head oil chamber, the valve position of the three-position four-way directional valve can be adjusted according to the reading of the oil discharge pressure gauge. There is no need for the operator to repeatedly return to the instrument rack and the cylinder head pressure regulating valve position, which improves the adjustment efficiency and saves time and effort. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0014] In the diagram, 1. Overflow valve; 2. Mounting bracket; 21. Inner plate; 22. Connecting column; 23. Outer plate; 24. Nut; 3. Pneumatic motor; 31. Coupling; 4. Three-position four-way directional valve; 5. Air pipe one; 6. Air pipe two; 7. Air pipe three; 8. Needle valve; 9. Pressure reducing valve. Detailed Implementation

[0015] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of this utility model, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the concept and technical solution of this utility model.

[0016] like Figure 1-2 As shown, this utility model provides a pneumatic pressure regulating device for a diaphragm compressor, including an overflow valve 1, a pneumatic motor 3, a three-position four-way reversing valve 4, and a needle valve 8. The overflow valve 1 is connected to the cylinder head component, and a mounting bracket 2 is provided on the overflow valve 1. The pneumatic motor 3 is mounted on the mounting bracket 2, and its output shaft is connected to the adjusting rod of the overflow valve 1 through a coupling 31. Port A of the three-position four-way reversing valve 4 is connected to the air inlet of the pneumatic motor 3 through an air pipe 5. Port B of the three-position four-way reversing valve 4 is connected to the exhaust port of the pneumatic motor 3 through an air pipe 6. Port C of the three-position four-way reversing valve 4 is connected to an air source through an air pipe 7. A needle valve 8 is installed on the air pipe 7.

[0017] It should be noted that the mounting bracket 2 includes an inner plate 21, connecting columns 22 and an outer plate 23. The inner plate 21 is mounted on the overflow valve 1. Connecting columns 22 are evenly distributed on the four corners of the inner plate 21. The four connecting columns 22 are mounted on the same outer plate 23. The connecting columns 22 are fixed to the outer plate 23 by nuts 24 threaded to their outer ends.

[0018] In addition, a pressure reducing valve 9 is installed between the needle valve 8 and the three-position four-way reversing valve 4 in the gas tube 3 7. The pressure reducing valve 9 is a filter pressure reducing valve 9, which filters and reduces the pressure of the gas.

[0019] Detailed implementation methods and principles:

[0020] When using the pneumatic pressure regulating device of the diaphragm compressor, connect the overflow valve 1 of the pneumatic pressure regulating device to the cylinder head component, install the three-position four-way reversing valve 4 on the instrument frame and connect the air pipe 1 5, air pipe 2 6 and air pipe 3 7.

[0021] When it is necessary to increase the discharge pressure, open the needle valve 8. The gas passes through the pressure reducing valve 9 and then enters the three-position four-way directional valve 4. At this time, move the handle of the three-position four-way directional valve 4 to one side. The gas enters the pneumatic motor 3 through port A on the three-position four-way directional valve 4. The pneumatic motor 3 rotates clockwise, which drives the overflow valve 1 to rotate clockwise through the coupling 31, thereby increasing the discharge pressure.

[0022] When the pressure rises to the specified value, move the handle of the three-position four-way directional valve 4 to the middle position, the motor will stop rotating, and the oil discharge pressure will stop rising.

[0023] When it is necessary to increase or decrease the oil discharge pressure, the handle of the three-position four-way directional valve 4 is moved to the other side. Gas enters the pneumatic motor 3 through port B on the three-position four-way directional valve 4. The pneumatic motor 3 rotates counterclockwise, which drives the overflow valve 1 to rotate counterclockwise through the coupling 31, thereby reducing the oil discharge pressure.

[0024] In summary, the three-position four-way directional valve 4 of this application is installed on the instrument rack. It can remotely control the pneumatic motor 3 through air pipe 1 5 and air pipe 2 6, and can be remotely connected to the air source through air pipe 3 7. When adjusting the oil discharge pressure of the cylinder head oil chamber, the valve position of the three-position four-way directional valve 4 can be adjusted according to the reading of the oil discharge pressure gauge. There is no need for the operator to repeatedly return to the instrument rack and the cylinder head pressure regulating valve position, which improves the adjustment efficiency and saves time and effort.

[0025] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A pneumatic pressure regulating device for a diaphragm compressor, characterized in that: The system includes an overflow valve (1), a pneumatic motor (3), a three-position four-way directional valve (4), and a needle valve (8). The overflow valve (1) is connected to the cylinder head assembly. The overflow valve (1) is equipped with a mounting bracket (2). The pneumatic motor (3) is mounted on the mounting bracket (2), and its output shaft is connected to the adjusting rod of the overflow valve (1) via a coupling (31). The A port of the three-position four-way directional valve (4) is connected to the air inlet of the pneumatic motor (3) via an air pipe (5). The B port of the three-position four-way directional valve (4) is connected to the exhaust port of the pneumatic motor (3) via an air pipe (6). The C port of the three-position four-way directional valve (4) is connected to the air source via an air pipe (7). The needle valve (8) is installed on the air pipe (7).

2. The pneumatic pressure regulating device for a diaphragm compressor according to claim 1, characterized in that: The mounting bracket (2) includes an inner plate (21), connecting columns (22) and an outer plate (23). The inner plate (21) is mounted on the overflow valve (1). Connecting columns (22) are evenly distributed on the four corners of the inner plate (21), and the same outer plate (23) is mounted on the four connecting columns (22).

3. The pneumatic pressure regulating device for a diaphragm compressor according to claim 2, characterized in that: The connecting column (22) is fixed to the outer plate (23) by a nut (24) threaded to its outer end.

4. The pneumatic pressure regulating device for a diaphragm compressor according to claim 1, characterized in that: The trachea 3 (7) has a pressure reducing valve (9) installed between the needle valve (8) and the three-position four-way reversing valve (4).

5. A pneumatic pressure regulating device for a diaphragm compressor according to claim 4, characterized in that: The pressure reducing valve (9) is a filter pressure reducing valve (9).

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