Pressure adjusting method for overflow valve of diaphragm compressor

Abstract

The invention relates to the technical field of diaphragm compressors, in particular to a pressure adjusting method for an overflow valve of a diaphragm compressor. Comprising a membrane head, an overflow opening in the membrane head is connected with a first connector of a four-way connector through a pipeline, a second connector of the four-way connector is connected with an overflow valve through a pipeline, a third connector of the four-way connector is connected with a needle valve A through a pipeline, and the overflow valve is connected with a backflow pipeline after being in butt joint with the pipeline of the needle valve A; a fourth connector of the four-way connector is connected with the one-way valve through a pipeline, the other end of the one-way valve is connected with a first connector of the three-way connector, a second connector of the three-way connector is connected with the pressure gauge through a pipeline, and a third connector of the three-way connector is connected with the needle valve B through a pipeline. The pressure of hydraulic oil in the diaphragm head can be calibrated according to the pressure displayed by the pressure gauge, the specific position of the adjusting handle is finally determined and fixed through the locking nut, the overflow pressure of the overflow valve is accurately adjusted, and it is ensured that the internal pressure of the diaphragm head meets the standard requirement.

Description

Technical field:

[0001] The invention relates to the technical field of diaphragm compressors, and in particular to a pressure regulating method for a diaphragm compressor overflow valve. Background technology:

[0002] At present, in diaphragm compressors, a relief valve is installed on the diaphragm head. When the oil pressure in the diaphragm head is too high, part of the hydraulic oil is discharged through the relief valve to protect the inside of the diaphragm head from overpressure. The discharged hydraulic oil will flow back to the diaphragm compressor through the pipeline for recycling. In actual working process, the current relief valve will have inaccurate overflow pressure after being used for a period of time, and cannot accurately overflow according to the set pressure, resulting in high or low pressure in the diaphragm head. High pressure will affect the life of the internal parts of the diaphragm head, and low pressure will affect the compression efficiency in the diaphragm head. There is currently no good solution to the above problems.

[0003] In summary, the above-mentioned problems of the overflow valve in the diaphragm compressor have become technical problems that need to be solved urgently in the industry. Summary of the invention:

[0004] In order to make up for the deficiencies of the prior art, the present invention provides a pressure regulating method for a diaphragm compressor overflow valve, which solves the problem that the pressure inside the diaphragm head is too high or too low due to inaccurate overflow pressure of the previous overflow valve.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A method for regulating the pressure of a diaphragm compressor overflow valve comprises a diaphragm head, an overflow port on the diaphragm head is connected to a first interface of a four-way joint via a pipeline, a second interface of the four-way joint is connected to the overflow valve via a pipeline, a third interface of the four-way joint is connected to a needle valve A via a pipeline, the pipelines of the overflow valve and the needle valve A are butt-jointed and then connected to a return pipeline, the other end of the return pipeline is connected to the diaphragm compressor, in a normal state, the fourth interface of the four-way joint is closed by a plug, and when the overflow pressure of the overflow valve needs to be regulated, the following steps are adopted:

[0007] First, the fourth interface of the four-way joint is connected to the regulating device via a pipeline, the regulating device includes a one-way valve connected to the fourth interface of the four-way joint via a pipeline, the other end of the one-way valve is connected to the first interface of the three-way joint, the second interface of the three-way joint is connected to the pressure gauge via a pipeline, and the third interface of the three-way joint is connected to the needle valve B via a pipeline;

[0008] Then, when the diaphragm compressor is running, turn the regulating handle of the relief valve completely counterclockwise, close needle valve A, and open needle valve B until there is no more gas overflowing from the needle valve B pipeline, and all that flows out is hydraulic oil, then close needle valve B;

[0009] Then, the pressure inside the diaphragm head is continuously changed by adjusting the regulating handle of the relief valve. The pressure gauge displays the pressure adjusted by the regulating handle in real time. The pressure of the hydraulic oil inside the diaphragm head is calibrated according to the pressure displayed by the pressure gauge. Finally, the specific position of the regulating handle is determined and fixed by the locking nut.

[0010] Finally, after the pressure calibration is completed, the diaphragm compressor is shut down, and the regulating device connected to the fourth interface of the four-way joint is disassembled, and then the fourth interface of the four-way joint is sealed with a plug to complete the entire regulating work.

[0011] The one-way valve, three-way joint, pressure gauge, needle valve B and pipeline are all connected through CT threads.

[0012] The pressure gauge is a shock-resistant pressure gauge.

[0013] The pressure resistance of the one-way valve, three-way joint, pressure gauge, needle valve B and pipeline shall not be less than 20,000 PSI.

[0014] The present invention adopts the above scheme and has the following advantages:

[0015] By setting a one-way valve, a three-way joint, a pressure gauge and a needle valve B, when the diaphragm compressor is running, the adjusting handle of the relief valve is completely turned out counterclockwise and the needle valve A is closed. The pressure inside the diaphragm head can be continuously changed by adjusting the adjusting handle of the relief valve, and the pressure gauge can display the pressure adjusted by the adjusting handle in real time. The pressure of the hydraulic oil inside the diaphragm head can be calibrated according to the pressure displayed on the pressure gauge. Finally, the specific position of the adjusting handle is determined and fixed by the locking nut to achieve precise adjustment of the relief pressure of the relief valve to ensure that the internal pressure of the diaphragm head meets the standard requirements. Description of the drawings:

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the installation structure of the present invention.

[0018] Figure 3 It is a schematic diagram of the principle of the present invention.

[0019] In the figure, 1, diaphragm head, 2, four-way connector, 3, overflow valve, 4, needle valve A, 5, return line, 6, diaphragm compressor, 7, one-way valve, 8, three-way connector, 9, pressure gauge, 10, needle valve B, 11, gear pump, 12, cooler, 13, filter, 14, oil supply pump. Specific implementation method:

[0020] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0021] like Figure 1-3 As shown, a method for regulating the pressure of a diaphragm compressor overflow valve comprises a diaphragm head 1, an overflow port on the diaphragm head 1 is connected to a first interface of a four-way joint 2 via a pipeline, a second interface of the four-way joint 2 is connected to an overflow valve 3 via a pipeline, a third interface of the four-way joint 2 is connected to a needle valve A4 via a pipeline, the needle valve A4 is used to exhaust the air in the pipeline during initial operation, the pipelines of the overflow valve 3 and the needle valve A4 are connected to a return pipeline 5 after docking, the other end of the return pipeline 5 is connected to a diaphragm compressor 6, under normal conditions, the fourth interface of the four-way joint 2 is closed by a plug, and when the overflow pressure of the overflow valve 3 needs to be adjusted, the following steps are adopted:

[0022] First, the fourth interface of the four-way joint 2 is connected to the regulating device via a pipeline, and the regulating device includes a one-way valve 7 connected to the fourth interface of the four-way joint 2 via a pipeline, the other end of the one-way valve 7 is connected to the first interface of the three-way joint 8, the second interface of the three-way joint 8 is connected to the pressure gauge 9 via a pipeline, and the third interface of the three-way joint 8 is connected to the needle valve B10 via a pipeline;

[0023] Then, when the diaphragm compressor 6 is running, the regulating handle of the relief valve 3 is completely turned out counterclockwise, and the needle valve A4 is closed, and the needle valve B10 is opened until there is no more gas overflowing from the needle valve B10 pipeline, and all the hydraulic oil flows out, and then the needle valve B10 is closed;

[0024] Then, the pressure inside the diaphragm head 1 is continuously changed by adjusting the regulating handle of the relief valve 3, and the pressure gauge 9 displays the pressure adjusted by the regulating handle in real time. The pressure of the hydraulic oil inside the diaphragm head 1 is calibrated according to the pressure displayed by the pressure gauge 9, and finally the specific position of the regulating handle is determined and fixed by the locking nut;

[0025] Finally, after the pressure calibration is completed, the diaphragm compressor 6 is shut down, and the regulating device connected to the fourth interface of the four-way joint 2 is disassembled, and then the fourth interface of the four-way joint is sealed with a plug to complete the entire regulating work.

[0026] The one-way valve 7, three-way connector 8, pressure gauge 9, needle valve B10 and pipeline are all connected via CT threads.

[0027] The pressure gauge 9 is a shock-resistant pressure gauge.

[0028] The pressure resistance of the one-way valve 7, three-way connector 8, pressure gauge 9, needle valve B10 and pipeline is not less than 20000PSI.

[0029] Working principle:

[0030] Under normal conditions, the fourth interface of the four-way joint 2 is closed by a plug. When it is necessary to adjust the overflow pressure of the overflow valve 3, first, when the diaphragm compressor 6 is running, the adjusting handle of the overflow valve 3 is completely unscrewed counterclockwise, and the needle valve A4 is closed, and the needle valve B10 is opened until there is no more gas overflowing in the needle valve B10 pipeline, and all the hydraulic oil flows out, and then the needle valve B10 is closed. By adjusting the adjusting handle of the overflow valve 3, the pressure inside the diaphragm head 1 can be continuously changed, and the pressure gauge 9 can display the pressure adjusted by the adjusting handle in real time. According to the pressure displayed by the pressure gauge 9, the pressure of the hydraulic oil inside the diaphragm head 1 can be calibrated, and the specific position of the adjusting handle is finally determined and fixed by the locking nut. After the pressure calibration is completed, the diaphragm compressor 6 is stopped, and the components connected to the fourth interface of the four-way joint 2 are disassembled, and then the fourth interface of the four-way joint 2 is closed with a plug to complete the entire adjustment work, so as to achieve precise adjustment of the overflow pressure of the overflow valve 3 and ensure that the internal pressure of the diaphragm head 1 meets the standard requirements. The hydraulic oil overflowing from the overflow valve 3 enters the diaphragm compressor 6 through the return pipe 5, and the hydraulic oil stored in the diaphragm compressor 6 is pumped into the cooler 12 through the gear pump 11 for cooling. Then, one branch is filtered by the filter 13 and then pumped back into the membrane head 1 through the oil replenishment pump 14, and the other branch returns to the diaphragm compressor 6 to lubricate the internal components of the diaphragm compressor 6.

[0031] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0032] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A method for regulating the pressure of a diaphragm compressor overflow valve, characterized in that: It includes a diaphragm head, the overflow port on the diaphragm head is connected to the first interface of the four-way joint through a pipeline, the second interface of the four-way joint is connected to the overflow valve through a pipeline, the third interface of the four-way joint is connected to the needle valve A through a pipeline, the pipelines of the overflow valve and the needle valve A are connected to the return pipeline after docking, and the other end of the return pipeline is connected to the diaphragm compressor. Under normal conditions, the fourth interface of the four-way joint is closed by a plug. When the overflow pressure of the overflow valve needs to be adjusted, the following steps are adopted: First, the fourth interface of the four-way joint is connected to the regulating device via a pipeline, the regulating device includes a one-way valve connected to the fourth interface of the four-way joint via a pipeline, the other end of the one-way valve is connected to the first interface of the three-way joint, the second interface of the three-way joint is connected to the pressure gauge via a pipeline, and the third interface of the three-way joint is connected to the needle valve B via a pipeline; Then, when the diaphragm compressor is running, turn the regulating handle of the relief valve completely counterclockwise, close needle valve A, and open needle valve B until there is no more gas overflowing from the needle valve B pipeline, and all that flows out is hydraulic oil, then close needle valve B; Then, the pressure inside the diaphragm head is continuously changed by adjusting the regulating handle of the relief valve. The pressure gauge displays the pressure adjusted by the regulating handle in real time. The pressure of the hydraulic oil inside the diaphragm head is calibrated according to the pressure displayed by the pressure gauge. Finally, the specific position of the regulating handle is determined and fixed by the locking nut. Finally, after the pressure calibration is completed, the diaphragm compressor is shut down, and the regulating device connected to the fourth interface of the four-way joint is disassembled, and then the fourth interface of the four-way joint is sealed with a plug to complete the entire regulating work.

2. A diaphragm compressor overflow valve pressure regulation method according to claim 1, characterized in that: The one-way valve, three-way joint, pressure gauge, needle valve B and pipeline are all connected through CT threads.

3. A diaphragm compressor overflow valve pressure regulation method according to claim 1, characterized in that: The pressure gauge is a shock-resistant pressure gauge.

4. A diaphragm compressor overflow valve pressure regulating method according to claim 1, characterized in that: The pressure resistance of the one-way valve, three-way joint, pressure gauge, needle valve B and pipeline shall not be less than 20,000 PSI.

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