Compressor test system with recyclable test media and control method

Abstract

The application provides a compressor test system and a control method for testing recyclable medium, which comprises a test circulation pipeline and a shutdown recycling pipeline. The test circulation pipeline comprises a container, a first valve group, a second valve group, a pressure reducing valve and a jacket cooler connected in sequence. The outlet end of the jacket cooler is connected with the air inlet of a compressor to be tested. The test circulation pipeline further comprises a mass flow meter, a back pressure valve, a reflux buffer bottle, a first one-way valve and a third valve group connected in sequence. The inlet end of the mass flow meter is connected with the air outlet of the compressor to be tested. The third valve group is connected with the inlet end of the jacket cooler. The shutdown recycling pipeline comprises a fourth valve group, a flow regulating valve, a recycling gas-driven booster pump, a second one-way valve, a fifth valve group and a recycling gas storage bottle connected in sequence. In the working process of the test compressor, the test medium is recycled. After the test compressor stops, the test medium is recycled to the recycling gas storage bottle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor testing, in particular to a compressor testing system with recyclable testing medium and a control method. BACKGROUND

[0002] Among the various devices of a hydrogen refueling station, the hydrogen compressor is used to pressurize low-pressure hydrogen to high-pressure hydrogen storage equipment or vehicles, and is an important device in the hydrogen refueling station. Therefore, testing the performance of the compressor is particularly important.

[0003] To ensure safety and that the test results truly reflect the performance of the compressor, helium medium close to the performance of hydrogen medium is generally used for testing. However, the diaphragm compressor needs to be started under light load, the diaphragm needs to be non-deformed when the compressor stops, and the system needs to maintain a positive pressure. Therefore, the testing medium needs to be released when the compressor stops to meet the above requirements. Since helium is expensive, helium release will directly affect the testing cost of the compressor, and bring huge economic pressure to new product development. SUMMARY

[0004] The summary section is used to briefly introduce the concepts, which will be described in detail in the specific embodiments section. The summary section of the present disclosure is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] Some embodiments of the present application provide a compressor testing system with recyclable testing medium and a control method to solve the technical problems mentioned in the background section.

[0006] In a first aspect, the present application provides a compressor testing system with recyclable testing medium, which comprises a test circulation pipeline and a shutdown recovery pipeline. The test circulation pipeline comprises a container, a first valve group, a second valve group, a pressure reducing valve and a jacket cooler connected in sequence. The outlet end of the jacket cooler is connected to the gas inlet of the compressor to be tested. The test circulation pipeline further comprises a mass flow meter, a back pressure valve, a backflow buffer bottle, a first check valve and a third valve group connected in sequence. The inlet end of the mass flow meter is connected to the gas outlet of the compressor to be tested. The third valve group is connected to the inlet end of the jacket cooler. The shutdown recovery pipeline comprises a fourth valve group, a flow regulating valve, a recovery gas-driven booster pump, a second check valve, a fifth valve group and a recovery gas storage bottle connected in sequence. During the operation of the compressor to be tested, the first valve group, the second valve group and the third valve group are opened, so that the testing medium is recycled. After the compressor to be tested stops testing, the fourth valve group and the fifth valve group are opened, and the testing medium is recovered to the recovery gas storage bottle under the assistance of the recovery gas-driven booster pump.

[0007] In a second aspect, the present application provides a control method for the above-mentioned compressor testing system with recyclable test medium, which comprises: in response to testing the performance of a compressor, controlling the first valve group, the second valve group and the third valve group to open, so that the test medium flows through the test cycle pipeline; in response to the compressor stopping testing, controlling the fourth valve group and the fifth valve group to open, so that the test medium flows through the shutdown cycle pipeline until the pressure in the compressor reaches a preset value.

[0008] The above-mentioned embodiments of the present application have the following beneficial effects: through the compressor testing system with recyclable test medium and the control method of the present application, the test medium can be recycled during the testing process of the compressor and stored in the recycling gas storage cylinder after the compressor stops testing. Compared with the current direct discharge of the test medium, the testing cost is greatly saved. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0010] Figure 1 Structure schematic diagram of an embodiment of the compressor testing system with recyclable test medium of the present application;

[0011] Figure 2 Structure schematic diagram of some embodiments of the water chiller of the present application;

[0012] Figure 3 Flowchart of some embodiments of the control method for the compressor testing system with recyclable test medium of the present application.

[0013] Explanation of reference signs:

[0014] 11: container compartment; 12: pressure reducing valve; 13: jacket cooler; 14: mass flow meter; 15: back pressure valve; 16: backflow buffer bottle; 17: water chiller; 21: first valve group; 22: second valve group; 23: third valve group; 24: fourth valve group; 25: fifth valve group; 26: sixth valve group; 31: first check valve; 32: second check valve; 33: third check valve; 4: compressor; 51: first pressure sensor; 52: second pressure sensor; 53: third pressure sensor; 61: first temperature sensor; 62: second temperature sensor; 71: flow regulating valve; 72: recycling gas driving booster pump; 73: recycling gas storage cylinder; 81: first vent valve; 82: second vent valve; 83: safety valve. DETAILED DESCRIPTION

[0015] The technical solutions of the present application will be described in detail below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0016] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0017] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited. In addition, the terms "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0018] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0019] First, please refer to Figure 1 , Figure 1 is a structural schematic diagram of an embodiment of a compressor test system with test medium recyclable. As Figure 1 shown, the test system includes a test circulation pipeline. The test circulation pipeline includes a container compartment 11, a first valve group 21, a second valve group 22, a pressure reducing valve 12, and a jacket cooler 13 connected in sequence through the pipeline. The outlet end of the jacket cooler 13 is connected with the air inlet of the compressor 4.

[0020] The test loop further comprises a mass flow meter 14, a back pressure valve, a return buffer bottle 16, a first check valve 31 and a third valve group 23 connected in sequence. The inlet of the mass flow meter 14 is connected to the outlet of the compressor 4, and the third valve group 23 is connected to the inlet of the jacketed cooler 13.

[0021] The test package 11 provides test medium as a gas source. The test medium can be a medium similar to hydrogen, so as to simulate the process of compressing hydrogen by the compressor 4 and test the performance of the compressor 4. As an example, the test medium can be helium. The pressure reducing valve 12 and the back pressure valve 15 are used to adjust the pressure of the test loop. Optionally, a first pressure sensor 51 and a second pressure sensor 52 can be arranged at the outlet and the inlet of the compressor 4, respectively. When the pressure value collected by the first pressure sensor 51 exceeds a preset pressure threshold range, the pressure reducing valve 12 can be adjusted. Similarly, when the pressure value collected by the second pressure sensor 52 exceeds the preset pressure threshold range, the back pressure valve 15 can be adjusted. In this way, the pressure of the test loop can be stabilized, and the accuracy of the test of the compressor 4 can be improved. The preset pressure threshold range can be determined by a person skilled in the art through repeated tests according to test requirements.

[0022] The jacketed cooler 13 is used to cool the test medium, so that the test medium meets the test temperature. Next, the structure and the working principle of the jacketed cooler 13 will be described in combination with Figure 2 the accompanying drawings. Figure 2 is described below. The test system further comprises a chiller 17 used to cool cooling water, so that the jacketed cooler 13 can cool the test medium. Specifically, the outlet of the chiller 17 is connected to the inlet of the jacketed cooler 13 and the cooling water inlet of the compressor 4, respectively. The cooling water outlet of the jacketed cooler 13 and the cooling water outlet of the compressor 4 are connected to the inlet of the chiller 17. In this way, the cooling water cooled by the chiller 17 can continuously cool the jacketed cooler 13 and the compressor 4.

[0023] Further, a first temperature sensor 61 and a second temperature sensor 62 can be arranged at the outlet and the inlet of the compressor 4, respectively. In response to the temperature value collected by the first temperature sensor 61 and / or the second temperature sensor 62 exceeding a preset temperature threshold range, indicating that the cooling function of the jacketed cooler 13 or the compressor 4 is insufficient, the refrigeration power of the chiller 17 can be adjusted. It should be noted that the preset temperature threshold range can be determined by a person skilled in the art through repeated tests according to test requirements.

[0024] Referring back to Figure 1The mass flow meter 14 is used to collect the mass flow at the outlet of the compressor 4. The performance of the compressor 4 is determined by comparing the mass flow with the design value or the required value. The backflow buffer bottle 16 is used to collect the test medium and buffer the pressure of the test medium, so that the pressure of the test loop is more secure. The first check valve 31 is used to limit the flow direction of the test medium from the backflow buffer bottle 16, so as to avoid the disorder of the test medium.

[0025] During the test of the compressor 4, the first valve group 21, the second valve group 22 and the third valve group 23 are opened, the test medium flows from the container 11 into the test loop, is cooled by the jacketed cooler 13 and is adjusted in pressure by the pressure reducing valve 12, and then enters the compressor 4. The mass flow meter 14 collects the mass flow at the outlet of the compressor 4, and then determines the performance of the compressor 4. After the test medium continues to flow to the backflow buffer bottle 16, it flows into the inlet of the jacketed cooler 13 through the first check valve 31, so as to realize the recycling of the test medium.

[0026] Continuing to refer to Figure 1 The test system further includes a shutdown recovery pipeline. The shutdown recovery pipeline includes a fourth valve group 24, a flow regulating valve 71, a recovery gas-driven booster pump 72, a second check valve 32, a fifth valve group 25 and a recovery gas storage bottle 73 connected in sequence. The fourth valve group 24 is connected to the outlet of the backflow buffer bottle 16. When the test of the compressor 4 is completed, the compressor 4 is shut down. At this time, the first valve group 21, the second valve group 22 and the third valve group 23 are closed, the fourth valve group 24 and the fifth valve group 25 are opened, and the recovery gas-driven booster pump 72 starts to work, so that the test medium in the test loop, the compressor 4 and the backflow buffer bottle 16 enters the recovery gas storage bottle 73, until the pressure value collected by the first pressure sensor 51 reaches a preset value. The pressure of the compressor 4 meets the required positive pressure. The preset value can be determined according to the parameters of the compressor 4. In this way, when the compressor 4 is shut down, the test medium can be timely stored in the recovery gas storage bottle 73, and compared with the treatment of discharging the test medium, the test cost is greatly reduced.

[0027] Further, the test system can further include a gas supply pipeline provided with a sixth valve group 26. In the assembled state, the two ends of the sixth valve group 26 are respectively connected to the gas outlet end of the first valve group 21 and the end of the fifth valve group 25 away from the recovery gas storage bottle 73. A third pressure sensor 53 can also be arranged at the outlet of the recovery gas storage bottle 73. When the compressor 4 is started again for testing, the recovery gas storage bottle 73 can be used as a gas source to provide test medium for the test of the compressor.

[0028] Specifically, in response to the value of the third pressure sensor 53 exceeding a preset threshold, indicating sufficient test medium in the recovery gas cylinder 73, the second valve body 22, the third valve body 23, the fourth valve body 24, and the sixth valve body 26 open, allowing the test medium in the recovery gas cylinder 73 to enter the test circulation pipeline. In response to the value of the first pressure sensor 51 falling below a preset threshold, indicating insufficient test medium in the recovery gas cylinder 73, the sixth valve group 26 closes, and the first valve group 21, the second valve group 22, the third valve group 23, and the fourth valve group 24 open, allowing the test gas to be transferred to the compressor 4 via the container 11.

[0029] In this way, when the compressor 4 is tested again, the gas storage cylinder 73 can be used as the gas source to provide the test medium first, so that the test medium stored when the compressor 4 is stopped can be recycled, further improving the recyclability of the test medium of the test system.

[0030] Furthermore, the testing system may also include a first vent line and a second vent line. One end of the aforementioned first vent line ( Figure 1 The left end of the first vent pipe is connected to the centralized vent. Figure 1 The right end of the first vent pipe is connected to the outlet of the reflux buffer bottle 16 and the inlet of the fourth valve group 24. A third check valve 33 and a first vent valve 81 are provided on the first vent pipe. In the working state, the first vent valve 81 is opened, which can discharge the test medium in the reflux buffer bottle 16 and the recovery gas storage bottle 73 at the outlet of the compressor 4 through the centralized vent.

[0031] One end of the aforementioned second vent pipe ( Figure 1 The lower end of the tube is connected to the inlet end of the aforementioned shell cooler 13, and the other end of the aforementioned second vent pipe ( Figure 1 The upper end of the compressor 4 is connected to the inlet end of the third check valve 33. A second vent valve 82 is provided on the second vent pipeline. In the working state, the second vent valve 82 is open, which can discharge the test medium of the test circulation pipeline at the inlet end of the compressor 4 through the centralized vent port.

[0032] In this way, the test medium in the pipelines and equipment can be replaced by opening the first vent valve 81 and the second vent valve 82. For example, at the beginning of the test, nitrogen is used to replace the air in the system, and helium is used to replace the nitrogen. In addition, the first vent valve 81 and the second vent valve 82 can ensure the pressure stability of the system. When the system pressure is too high, opening the first vent valve 81 and / or the second vent valve 82 can reduce the system pressure in time, thereby avoiding the occurrence of safety accidents.

[0033] Further, the test system further comprises a safety pipeline, one end of the safety pipeline is connected with the inlet end of the sleeve cooler, the other end of the safety pipeline is connected with the inlet end of the third one-way valve 33, and a safety valve 83 is arranged on the safety pipeline. In response to the safety valve 83 detecting that the pressure of the test circulation pipeline exceeds a safety value, the safety valve 83 is opened, so that the test medium is discharged by the centralized discharge port.

[0034] The test system further comprises a controller, which is in communication connection with the test circulation pipeline, the shutdown recovery pipeline and the gas supply pipeline, and realizes automatic control. Specifically, the controller can be a terminal device including an information receiving unit with information transceiving function, a processing unit with information processing function and an output information unit outputting control signals. For example, a PLC (Programmable Logic Controller).

[0035] The application further provides a control method of a compressor test system for recyclable test medium, which is used in the test system in each of the embodiments. As shown in Figure 3 FIG. 3, which shows a flowchart 300 of some embodiments of the control method of the compressor test system for recyclable test medium of the application. The method can include the following steps:

[0036] Step 301, in response to testing the performance of the compressor, the first valve group, the second valve group and the third valve group are controlled to be opened, so that the test medium flows by the test circulation pipeline.

[0037] In some embodiments, the execution subject of the control method can be the controller described above. The controller is in communication connection with the test circulation pipeline. The controller can further include a man-machine interaction interface or control software. When a worker clicks a button corresponding to starting to test the performance of the compressor, the controller opens the first valve group 21 (as shown in Figure 1 FIG. 2), the second valve group 22 and the third valve group 23, the test medium flows from the container 11 into the test circulation pipeline, passes through the temperature reduction operation of the sleeve cooler 13 and the pressure adjustment of the test circulation pipeline by the pressure reducing valve 12 to enter the compressor 4. The mass flow meter 14 collects the mass flow at the outlet end of the compressor 4, and then determines the performance of the compressor 4. After the test medium continues to move to the reflux buffer bottle 16, it flows into the inlet end of the sleeve cooler 13 through the first one-way valve 31, realizing the recycling use of the test medium.

[0038] Step 302, in response to stopping the test of the compressor, the fourth valve group and the fifth valve group are controlled to be opened, so that the test medium flows by the shutdown circulation pipeline until the pressure in the compressor reaches a preset value.

[0039] In some embodiments, the controller is in communication with the shutdown recovery pipeline. When the worker clicks the button corresponding to starting the test of the compressor performance, the controller closes the first valve group 21, the second valve group 22 and the third valve group 23, opens the fourth valve group 24 and the fifth valve group 25, and starts the recovery gas drive booster pump 72, so that the test medium in the test circulation pipeline, the compressor 4 and the reflux buffer bottle 16 enters the reflux gas storage bottle 73 until the pressure of the compressor 4 meets the required positive pressure. As an example, a first pressure sensor 51 can be arranged at the inlet end of the compressor, and the pressure value collected by the first pressure sensor 51 is compared with the preset value.

[0040] In an optional implementation of some embodiments, when the compressor test is started again, the recovery gas storage bottle 73 can be used as a gas source to provide test medium for the test of the compressor 4. Specifically, when the worker clicks the button corresponding to starting the test of the compressor 4 performance again, the controller first collects the pressure of the recovery gas storage bottle 73. Specifically, a third pressure sensor 53 in communication with the controller can be arranged at the mouth of the recovery gas storage bottle 73. In response to the value of the third pressure sensor 53 exceeding the preset threshold value, indicating that the test medium in the recovery gas storage bottle 73 is sufficient, the second valve body 22, the third valve body 23, the fourth valve body 24 and the sixth valve body 26 connected with the controller are opened, so that the test medium in the recovery gas storage bottle 73 enters the test circulation pipeline. In response to the value of the first pressure sensor 51 being lower than the preset threshold value, indicating that the test medium in the recovery gas storage bottle 73 is insufficient, the sixth valve group 26 is closed, and the first valve group 21, the second valve group 22, the third valve group 23 and the fourth valve group 24 are opened, so that the test gas is transmitted to the compressor 4 by the container 11.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A compressor testing system with recyclable test media, characterized in that, This includes testing the circulation piping and the shutdown recovery piping, among which, The test circulation pipeline includes a container, a first valve group, a second valve group, a pressure reducing valve, and a shell-and-tube cooler connected in sequence. The outlet end of the shell-and-tube cooler is connected to the inlet of the compressor under test. The test circulation pipeline also includes a mass flow meter, a back pressure valve, a reflux buffer bottle, a first check valve, and a third valve group connected in sequence. The inlet end of the mass flow meter is connected to the outlet of the compressor under test, and the third valve group is connected to the inlet end of the shell-and-tube cooler. The shutdown recovery pipeline includes a fourth valve group, a flow regulating valve, a recovery gas-driven booster pump, a second check valve, a fifth valve group, and a recovery gas storage cylinder connected in sequence. During compressor testing, the first valve group, the second valve group, and the third valve group are opened, allowing the test medium to be circulated. After the compressor stops testing, the fourth and fifth valve groups open, and with the assistance of the recovery gas booster pump, the test medium is recovered into the recovery storage cylinder. The testing system also includes a gas supply pipeline equipped with a sixth valve group, the two ends of which are respectively connected to the gas outlet of the first valve group and the end of the fifth valve group away from the recovery gas storage bottle; a third pressure sensor is also provided at the outlet end of the recovery gas storage bottle; when the compressor is restarted for testing, in response to the value of the third pressure sensor exceeding a preset threshold, the second valve body, the third valve body, the fourth valve body and the sixth valve body open, allowing the test gas in the recovery gas storage bottle to enter the test circulation pipeline; The compressor is equipped with a first pressure sensor at its inlet. In response to the value of the first pressure sensor being lower than a preset threshold, the sixth valve closes, and the first, second, third, and fourth valves open, allowing the test gas to be transferred to the compressor via the collection compartment. The testing system further includes a first venting pipeline and a second venting pipeline. One end of the first venting pipeline is connected to a centralized vent port, and the other end of the first venting pipeline is connected to the outlet of the reflux buffer bottle and the inlet of the fourth valve group. A third check valve and a first venting valve are provided on the first venting pipeline. One end of the second venting pipeline is connected to the inlet of the shell-and-tube cooler, and the other end of the second venting pipeline is connected to the inlet of the third check valve. A second venting valve is provided on the second venting pipeline.

2. The compressor testing system with recyclable test media according to claim 1, characterized in that, The jacket cooler is used to cool the test medium; the mass flow meter is used to collect the mass flow rate at the compressor outlet; the pressure reducing valve and the back pressure valve are used to regulate the pressure of the test circulation pipeline.

3. The compressor testing system with recyclable test media according to claim 2, characterized in that, The compressor is equipped with a second pressure sensor at its outlet. In response to the pressure value collected by the first pressure sensor and / or the second pressure sensor exceeding the preset pressure threshold range, the pressure reducing valve and / or the back pressure valve are adjusted.

4. The compressor testing system with recyclable test media according to claim 1, characterized in that, The testing system also includes a safety pipeline, one end of which is connected to the inlet of the shell-and-tube cooler, and the other end of which is connected to the inlet of the third one-way valve. A safety valve is installed on the safety pipeline.

5. The compressor testing system with recyclable test media according to claim 1, characterized in that, The testing system also includes a chiller, the circulating water outlet of which is connected to the circulating water inlet of the shell-and-tube cooler and the compressor, respectively; the circulating water outlets of the shell-and-tube cooler and the compressor are connected to the circulating water inlet of the chiller.

6. The compressor testing system with recyclable test media according to claim 5, characterized in that, The compressor is equipped with a first temperature sensor and a second temperature sensor at its outlet and inlet ends. In response to the temperature information collected by the first temperature sensor exceeding the preset temperature threshold range, the power of the chiller is adjusted.

7. The compressor testing system for recyclable test media according to any one of claims 1-6, characterized in that, The testing system also includes a controller, which is communicatively connected to the test circulation pipeline and the shutdown recovery pipeline.

8. A control method for a compressor testing system for recyclable test media as described in any one of claims 1-7, the control method comprising: In response to testing the compressor performance, the first valve group, the second valve group, and the third valve group are controlled to open, so that the test medium flows through the test circulation pipeline; In response to the compressor stopping test, the fourth and fifth valve groups are opened, allowing the test medium to flow through the shutdown circulation pipeline until the pressure inside the compressor reaches the preset value.

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