Diaphragm compressor internal circulation test system

Abstract

The utility model discloses an internal circulation test system of a diaphragm compressor, which relates to the technical field of diaphragm compressors and comprises a secondary exhaust buffer tank connected with an air outlet end of the diaphragm compressor and a primary air inlet buffer tank connected with the air outlet end of the diaphragm compressor. A gas inlet pipeline communicated with the first-stage gas inlet buffer tank is arranged at the gas outlet end of the second-stage gas exhaust buffer tank, a buffer bottle set and a buffer tank are arranged on the gas inlet pipeline, a valve I is arranged between the second-stage gas exhaust buffer tank and the buffer bottle set, and a gas exhaust pipeline is arranged at the outlet end of the buffer bottle set and the inlet end of the buffer tank in parallel. A valve II is arranged on the exhaust pipeline, and a valve III is arranged on the air inlet pipeline connected with the exhaust pipeline in parallel; the device is simple in structure and low in cost, can be recycled, does not affect the unit test environment, reduces the pressure of high-pressure gas generated at the exhaust end through the high-flow circulation test system by using the gas pressure generated by the working of the diaphragm compressor, and transmits the high-pressure gas to low-pressure gas required by the gas inlet end, and the gas and equipment can be repeatedly used.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm compressors, and particularly relates to an internal circulation test system for a diaphragm compressor. Background Technique

[0002] A diaphragm compressor is a reciprocating compressor that compresses and transports gases by means of a diaphragm reciprocating in a cylinder. The diaphragm is clamped by two limiting plates along the periphery to form a cylinder. The diaphragm is driven mechanically or hydraulically to reciprocate in the cylinder, thereby achieving the compression and transportation of gases. A large-flow circulation test system is used for the reliability circulation test system of a diaphragm compressor, and clean gas is required for the reliability test. Since the atmospheric pressure of natural air is relatively small compared to the intake pressure, it is necessary to use equipment to increase the pressure in order to enable the diaphragm compressor to reach the rated working conditions for the reliability test. The pressurizing equipment generally uses a screw air compressor and a set of drying and purification devices, which can meet the requirements of displacement and intake pressure. However, such a set of equipment has a high cost. When the diaphragm compressor is running, the screw air compressor also needs to run simultaneously. At this time, when the diaphragm compressor is running in test mode, it is necessary to increase operators to operate the screw air compressor, which wastes manpower. At the same time, the screw air compressor has too much noise, resulting in a poor operating environment for the diaphragm compressor. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide an internal circulation test system for a diaphragm compressor, which provides clean gas for the diaphragm compressor for reliability circulation running-in tests, has a low cost, can be recycled, and does not affect the test environment of the unit.

[0004] The internal circulation test system for a diaphragm compressor provided by the utility model adopts the following technical solutions:

[0005] An internal circulation test system for a diaphragm compressor includes a secondary exhaust buffer tank connected to the air outlet end of the diaphragm compressor and a primary intake buffer tank connected to the air outlet end of the diaphragm compressor. An intake pipeline communicating with the primary intake buffer tank is provided at the air outlet end of the secondary exhaust buffer tank. A buffer bottle group and a buffer tank are provided on the intake pipeline. A valve I is provided between the secondary exhaust buffer tank and the buffer bottle group. An exhaust pipeline is provided in parallel at the outlet end of the buffer bottle group and the inlet end of the buffer tank. A valve II is provided on the exhaust pipeline. A valve III is provided on the intake pipeline in parallel with the exhaust pipeline.

[0006] Further, the exhaust pipeline includes two buffer bottles connected in sequence. The valve II is provided between the two buffer bottles. Exhaust pipes are provided on both of the two buffer bottles, and exhaust valves are provided on the exhaust pipes.

[0007] Further, it further includes a gas supply pipeline for supplying gas to the primary intake buffer tank, and a valve IV is provided on the gas supply pipeline.

[0008] Furthermore, the supplementary gas pipeline includes a nitrogen gas cylinder and a pressure relief valve provided at the outlet end of the nitrogen gas cylinder.

[0009] Furthermore, the buffer bottle group includes an intake buffer bottle and an outlet buffer bottle that are interconnected. The intake buffer bottle is provided at the outlet end of Valve I and a plurality of them are arranged in series. The exhaust pipeline is provided at the outlet end of the outlet buffer bottle.

[0010] Furthermore, the buffer bottle group further includes a plurality of shunt buffer bottles arranged in parallel at the outlet end of the intake buffer bottle. The outlet end of the shunt buffer bottle is communicated with the intake end of the outlet buffer bottle.

[0011] Furthermore, a safety valve is provided on the parallel pipeline of the shunt buffer bottles.

[0012] Furthermore, a cooler is provided at the outlet end of the buffer bottle group. The cooler is provided at the outlet end of the outlet buffer bottle. The exhaust pipeline is provided at the outlet end of the cooler.

[0013] In summary, the present utility model includes at least one of the following beneficial effects: low cost, recyclable, does not affect the unit test environment, utilizes the gas pressure generated by the diaphragm compressor itself, and through a large-flow circulation test system, the high-pressure gas generated at the exhaust end is depressurized and transmitted to the low-pressure gas required at the intake end. The gas can be reused, and the equipment can also be reused. Description of the Drawings

[0014] Figure 1 It is the system schematic diagram of the embodiment of the present utility model;

[0015] Figure 2 It is the structural schematic diagram of the buffer bottle group of the embodiment of the present utility model.

[0016] Description of the Reference Numerals:

[0017] 1. Secondary exhaust buffer tank; 2. Primary intake buffer tank; 3. Buffer bottle group; 31. Intake buffer bottle; 32. Outlet buffer bottle; 33. Shunt buffer bottle; 34. Safety valve; 4. Buffer tank; 5a. Valve I; 5b. Valve II; 5c. Valve III; 5d. Valve IV; 6. Buffer bottle; 7. Nitrogen gas cylinder; 8. Cooler. Detailed Embodiments

[0018] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand the other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model.

[0019] The following will further elaborate on the present utility model in conjunction with the attached Figure 1-2 drawings for a more detailed description.

[0020] An embodiment of the present utility model discloses an internal circulation test system for a diaphragm compressor. Referring to Figure 1-2 , the internal circulation test system for a diaphragm compressor includes a secondary exhaust buffer tank 1 connected to the outlet end of the diaphragm compressor and a primary intake buffer tank 2 connected to the outlet end of the diaphragm compressor. An intake pipeline communicating with the primary intake buffer tank 2 is provided at the outlet end of the secondary exhaust buffer tank 1. A buffer bottle group 3 and a buffer tank 4 are provided on the intake pipeline. The specifications of the buffer tank 4 are 150L, 2MPa or 300L, 2MPa. A safety valve needs to be installed on the buffer tank 4 to control the gas pressure. A thermometer and a pressure gauge are installed to be able to check the internal temperature and pressure at any time, and then nitrogen is supplemented according to the actual situation. A valve I 5a is provided between the secondary exhaust buffer tank 1 and the buffer bottle group 4. An exhaust pipeline is provided in parallel at the outlet end of the buffer bottle group 3 and the inlet end of the buffer tank 4. A valve II 5b is provided on the exhaust pipeline. A valve III 5c is provided on the intake pipeline in parallel with the exhaust pipeline.

[0021] In this embodiment, two buffer bottles 6 connected in sequence are provided on the exhaust pipeline. The valve II 5b is provided between the two buffer bottles 6. Exhaust pipes are provided on both buffer bottles. An exhaust valve 61 is provided on the exhaust pipe. The specifications of the two buffer bottles 6 are 8L, 40MPa.

[0022] In this embodiment, it further includes a gas supplement pipeline for supplementing gas to the primary intake buffer tank 2, and a valve IV 5d is provided on the gas supplement pipeline.

[0023] In this embodiment, a nitrogen cylinder 7 and a pressure relief valve 71 provided at the outlet end of the nitrogen cylinder 7 are provided on the gas supplement pipeline. The specifications of the nitrogen cylinder 7 are 40L, 12 - 13MPa. The pressure relief valve 71 reduces the gas pressure discharged from the nitrogen cylinder 7 to 1.6MPa.

[0024] Before use, first close the valve I 5a and the valve III 5c, open the valve II 5b and the exhaust valve 61 for exhaust. After turning the crankshaft by hand, start the machine and run. Then close the valve II 5b and the exhaust valve 61, open the valve IV 5d and the nitrogen cylinder 7 to supplement gas to the primary intake buffer tank 2. Check the secondary exhaust buffer tank 1. When the pressure reaches 20MPa, slowly open the valve I 5a and continue to supplement gas. When the exhaust pressure reaches 22MPa and the intake pressure reaches 1.6MPa, close the valve IV 5d and slowly close the valve II 5b to achieve a stable external circulation effect. As the operation continues, the gas will be consumed, and it is necessary to open the valve IV 5d to supplement gas. Ball valves are used for all valves.

[0025] In this embodiment, the buffer bottle group 3 includes an intake buffer bottle 31 and an outlet buffer bottle 32 that are interconnected. The intake buffer bottle 31 is disposed at the outlet end of the valve I 5a and multiple intake buffer bottles 31 are arranged in series. The exhaust pipeline is disposed at the outlet end of the outlet buffer bottle 32. The intake buffer bottle 31 and the outlet buffer bottle 32 have a specification of 8L and 40MPa.

[0026] In this embodiment, the buffer bottle group 3 further includes a plurality of shunt buffer bottles 33 that are arranged in parallel at the outlet end of the intake buffer bottle 31. The outlet end of the shunt buffer bottle 33 is communicated with the intake end of the outlet buffer bottle 32. The shunt buffer bottle 33 has a specification of 12L and 40MPa. The shunt buffer bottle 33, the intake buffer bottle 31, and the outlet buffer bottle 32 are integrated onto a support frame and are connected internally by steel pipes. The discharged gas is compressed and buffered through the intake buffer bottle 31, the shunt buffer bottle 33, and the intake buffer bottle 31, making the gas pressure more stable.

[0027] In this embodiment, a safety valve 34 is disposed on the parallel pipeline of the shunt buffer bottle 33. The safety valve 34 is a pressure relief valve and starts to operate when the pressure reaches 25MPa.

[0028] In this embodiment, a cooler 8 is further included. The cooler 8 is disposed at the outlet end of the outlet buffer bottle 32. The exhaust pipeline is disposed at the outlet end of the cooler 8. During long-term operation, the gas temperature will continuously rise, and it is necessary to add a cooler 8 in the middle to cool down.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A diaphragm compressor internal circulation test system, characterized in that: The invention comprises a secondary exhaust buffer tank (1) connected to the outlet end of a diaphragm compressor and a primary air intake buffer tank (2) connected to the outlet end of the diaphragm compressor, wherein the outlet end of the secondary exhaust buffer tank (1) is provided with an air intake pipeline connected to the primary air intake buffer tank (2), a buffer bottle group (3) and a buffer tank (4) are provided on the air intake pipeline, a valve I (5a) is provided between the secondary exhaust buffer tank (1) and the buffer bottle group (3), an exhaust pipeline is provided in parallel between the outlet end of the buffer bottle group (3) and the inlet end of the buffer tank (4), a valve II (5b) is provided on the exhaust pipeline, and a valve III (5c) is provided on the air intake pipeline connected in parallel with the exhaust pipeline.

2. The diaphragm compressor internal circulation test system according to claim 1, characterized in that: The exhaust pipeline is provided with two buffer bottles (6) connected in sequence, the valve II (5b) is arranged between the two buffer bottles (6), and both of the two buffer bottles are provided with exhaust pipes, and the exhaust pipes are provided with exhaust valves (61).

3. The diaphragm compressor internal circulation test system according to claim 1, characterized in that: It also comprises an air supply pipeline for supplying air to the first-stage air intake buffer tank (2), and a valve IV (5d) is arranged on the air supply pipeline.

4. The diaphragm compressor internal circulation test system according to claim 3, characterized in that: The gas supply pipeline is provided with a nitrogen bottle (7) and a pressure relief valve (71) arranged at the outlet end of the nitrogen bottle (7).

5. The diaphragm compressor internal circulation test system according to claim 1, characterized in that: The buffer bottle group (3) comprises an air inlet buffer bottle (31) and an air outlet buffer bottle (32) which are interconnected, wherein the air inlet buffer bottle (31) is arranged at the outlet end of the valve I (5a) and a plurality of the air inlet buffer bottles (31) are arranged in series, and the exhaust pipeline is arranged at the outlet end of the air outlet buffer bottle (32).

6. The diaphragm compressor internal circulation test system according to claim 5, characterized in that: The buffer bottle group (3) further comprises a plurality of shunt buffer bottles (33) arranged in parallel at the gas outlet end of the gas inlet buffer bottle (31), and the gas outlet end of the shunt buffer bottle (33) is connected to the gas inlet end of the gas outlet buffer bottle (32).

7. The diaphragm compressor internal circulation test system according to claim 6, characterized in that: It also comprises a cooler (8), wherein the cooler (8) is arranged at the outlet end of the gas outlet buffer bottle (32), and the exhaust pipeline is arranged at the outlet end of the cooler (8).

Images