Part pressure measuring device

Abstract

The utility model provides a part pressure measuring device, and relates to the technical field of thermal management testing. The utility model provides a part pressure measuring device which comprises a first gas transmission device, a second gas transmission device, a connecting pipe group, a valve group and a detection assembly. The first gas transmission device is communicated with the first end of the first connecting pipe, the second gas transmission device is communicated with the second end of the first connecting pipe, the second preset gas pressure is larger than the first preset gas pressure, and a first connecting opening is formed between the two ends of the first connecting pipe. A second connecting port is formed between the two ends of the second connecting pipe; the first stop valve, the first pressure regulating valve and the first pressure gauge are arranged on the first connecting pipe between the first gas transmission device and the first connecting port; and the second stop valve, the second pressure regulating valve and the second pressure gauge are arranged on the first connecting pipe between the second gas transmission device and the first connecting port. The utility model provides a component pressure measuring device which is high in testing efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal management testing, in particular to a component pressure measuring device. Background Art

[0002] Before assembly and use, automotive thermal management components need to undergo a series of tests including flow curve, internal leakage, maximum valve opening pressure difference, pressure resistance, water inspection, air pressure explosion, etc. to ensure the reliability of the parts.

[0003] At present, in the testing of thermal management components, the gas supply pressure provided by the laboratory is generally low (about 0.8MPa), and only low-pressure testing can be performed. When performing high-pressure testing, special high-pressure testing equipment is required, and the testing efficiency is low. Utility Model Content

[0004] In order to solve at least one of the problems mentioned in the background technology, the utility model provides a component pressure measuring device with high testing efficiency.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a component pressure measuring device, comprising a first gas delivery device, a second gas delivery device, a connecting pipe group, a valve group and a detection component;

[0007] The connecting pipe group includes a first connecting pipe, a second connecting pipe, a third connecting pipe and a fourth connecting pipe, a first gas delivery device is connected to the first end of the first connecting pipe to inject gas of a first preset pressure into the first connecting pipe, a second gas delivery device is connected to the second end of the first connecting pipe to inject gas of a second preset pressure into the first connecting pipe, the second preset pressure is greater than the first preset pressure, a first connecting port is provided between the two ends of the first connecting pipe, a first end of the second connecting pipe is connected to the first connecting port, a second connecting port is provided between the two ends of the second connecting pipe, and one end of the third connecting pipe is connected to the second connecting port;

[0008] The valve group includes a first stop valve, a second stop valve, a third stop valve, a fourth stop valve, a first pressure regulating valve and a second pressure regulating valve, the detection component includes a first pressure gauge, a second pressure gauge and a first flow meter, the first stop valve, the first pressure regulating valve and the first pressure gauge are arranged on the first connecting pipe between the first gas transmission device and the first connecting port, the second stop valve, the second pressure regulating valve and the second pressure gauge are arranged on the first connecting pipe between the second gas transmission device and the first connecting port, the third stop valve is arranged on the third connecting pipe, the fourth stop valve and the first flow meter are arranged on the fourth connecting pipe, and the components are configured to be connected to the second end of the second connecting pipe or the fourth connecting pipe for testing.

[0009] As an optional implementation, the measuring range of the second pressure gauge is greater than the measuring range of the first pressure gauge.

[0010] As an optional implementation, the valve group further includes a first pressure reducing valve and a second pressure reducing valve disposed on the first connecting pipe;

[0011] In the direction from the first gas delivery device to the first connection port, a first stop valve, a first pressure reducing valve, a first pressure regulating valve and a first pressure gauge are arranged in sequence;

[0012] In the direction from the second gas delivery device to the first connecting port, the second stop valve, the second pressure reducing valve, the second pressure regulating valve and the second pressure gauge are arranged in sequence.

[0013] As an optional implementation, the valve group further includes a first one-way valve disposed on the first connecting pipe, the first one-way valve is located between the first pressure gauge and the first connecting port, and the first one-way valve is conductive in the direction of the first connecting port.

[0014] As an optional embodiment, the valve group also includes a fifth stop valve and a sixth stop valve arranged on the first connecting pipe, the fifth stop valve is located between the first pressure gauge and the first one-way valve, and the sixth stop valve is located between the second pressure gauge and the first connecting port.

[0015] As an optional embodiment, it also includes a first gas storage container and a second gas storage container arranged on the first connecting pipe, the first gas storage container is located between the first pressure reducing valve and the first pressure regulating valve, and the second gas storage container is located between the second pressure reducing valve and the second pressure regulating valve.

[0016] As an optional implementation, the valve group further includes a seventh stop valve, the detection assembly further includes a second flow meter, and the seventh stop valve and the second flow meter are arranged on the fourth connecting pipe;

[0017] There is a third connection port between the two ends of the fourth connecting pipe, the fourth stop valve and the first flow meter are located between the first end of the fourth connecting pipe and the third connection port, and the seventh stop valve and the second flow meter are located between the second end of the fourth connecting pipe and the third connection port.

[0018] As an optional implementation, the measuring range of the second flow meter is smaller than the measuring range of the first flow meter.

[0019] As an optional implementation, the first gas delivery device includes an air compressor, and the second gas delivery device includes a nitrogen storage device.

[0020] As an optional embodiment, the valve group further includes a second one-way valve disposed on the first connecting pipe, the second one-way valve is located between the sixth stop valve and the first connecting port, and the second one-way valve is conductive toward the first connecting port.

[0021] The component pressure measuring device provided by the utility model comprises a first gas delivery device, a second gas delivery device, a connecting pipe group, a valve group and a detection component; the connecting pipe group comprises a first connecting pipe, a second connecting pipe, a third connecting pipe and a fourth connecting pipe, the first gas delivery device is connected to the first end of the first connecting pipe to inject a gas of a first preset air pressure into the first connecting pipe, the second gas delivery device is connected to the second end of the first connecting pipe to inject a gas of a second preset air pressure into the first connecting pipe, the second preset air pressure is greater than the first preset air pressure, a first connecting port is provided between the two ends of the first connecting pipe, the first end of the second connecting pipe is connected to the first connecting port, a second connecting port is provided between the two ends of the second connecting pipe, and the third connecting pipe one end of is connected to the second connecting port; the valve group includes a first stop valve, a second stop valve, a third stop valve, a fourth stop valve, a first pressure regulating valve and a second pressure regulating valve, the detection component includes a first pressure gauge, a second pressure gauge and a first flow meter, the first stop valve, the first pressure regulating valve and the first pressure gauge are arranged on the first connecting pipe between the first gas transmission device and the first connecting port, the second stop valve, the second pressure regulating valve and the second pressure gauge are arranged on the first connecting pipe between the second gas transmission device and the first connecting port, the third stop valve is arranged on the third connecting pipe, the fourth stop valve and the first flow meter are arranged on the fourth connecting pipe, and the components are configured to be connected to the second end of the second connecting pipe or the fourth connecting pipe for testing.

[0022] When the component pressure measuring device provided by the utility model performs a low-pressure test on the component, the component to be tested can be connected to the second end of the second connecting pipe or the fourth connecting pipe, the first stop valve can be opened, the second stop valve can be closed, and the air pressure can be adjusted to a required value through the first pressure regulating valve; when performing a high-pressure test, the second stop valve can be opened, the first stop valve can be closed, and the air pressure can be adjusted to a required value through the second pressure regulating valve; the switching process is very convenient, and the test efficiency is improved, the third stop valve can control the on-off of the third connecting pipe to release pressure through the third connecting pipe, thereby improving the safety of the test system, and the fourth stop valve can control the on-off of the first flowmeter to measure the flow passing through the component to be tested through the first flowmeter, thereby testing the corresponding performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1A schematic diagram of the first structure of a component pressure measuring device provided by an embodiment of the utility model;

[0025] Figure 2 A second structural schematic diagram of a component pressure measuring device provided by an embodiment of the utility model;

[0026] Figure 3 A third structural schematic diagram of the component pressure measuring device provided in an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 100- measuring device;

[0029] 110-first gas delivery device;

[0030] 120- second gas transmission device;

[0031] 130 - connecting pipe group; 131 - first connecting pipe; 132 - second connecting pipe; 133 - third connecting pipe; 134 - fourth connecting pipe;

[0032] 140-valve group; 141-first stop valve; 142-second stop valve; 143-third stop valve; 144-fourth stop valve; 145-fifth stop valve; 146-sixth stop valve; 147-seventh stop valve; 148-first pressure regulating valve; 149-second pressure regulating valve; 1410-first pressure reducing valve; 1411-second pressure reducing valve; 1412-first check valve;

[0033] 150-detection component; 151-first pressure gauge; 152-second pressure gauge; 153-first flow meter; 154-second flow meter;

[0034] 160-first gas storage container;

[0035] 170- second gas storage container;

[0036] 200-samples. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In the application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0039] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0040] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0041] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0042] In the testing of thermal management components, the gas supply pressure provided by the laboratory is generally low (about 0.8MPa), and only low-pressure testing can be performed. When performing high-pressure testing, special high-pressure testing equipment is required. When performing high- and low-pressure switching tests, it is necessary to switch back and forth between high- and low-pressure testing equipment and repeatedly disassemble and assemble test samples, resulting in low testing efficiency.

[0043] In view of this, the utility model provides a component pressure measuring device 100. When performing a low-pressure test on a component, the component to be tested can be connected to the second end of the second connecting pipe 132 or the fourth connecting pipe 134, the first stop valve 141 can be in an open state, the second stop valve 142 can be in a closed state, and the air pressure can be adjusted to a required value through the first pressure regulating valve 148; when performing a high-pressure test, the second stop valve 142 can be in an open state, the first stop valve 141 can be in a closed state, and the air pressure can be adjusted to a required value through the second pressure regulating valve 149; the switching process is very convenient, and there is no need to repeatedly disassemble the test sample 200, thereby improving the test efficiency.

[0044] You can refer to Figures 1 to 3 The utility model provides a component pressure measuring device 100, including a first gas delivery device 110, a second gas delivery device 120, a connecting pipe group 130, a valve group 140 and a detection component 150, the connecting pipe group 130 includes a first connecting pipe 131, a second connecting pipe 132, a third connecting pipe 133 and a fourth connecting pipe 134, the first gas delivery device 110 is connected to the first end of the first connecting pipe 131 to inject a gas of a first preset air pressure into the first connecting pipe 131, the second gas delivery device 120 is connected to the second end of the first connecting pipe 131 to inject a gas of a second preset air pressure into the first connecting pipe 131, the second preset air pressure is greater than the first preset air pressure, a first connecting port is provided between the two ends of the first connecting pipe 131, a first end of the second connecting pipe is connected to the first connecting port, a second connecting port is provided between the two ends of the second connecting pipe 132, and one end of the third connecting pipe 133 is connected to the second connecting port The valve group 140 includes a first stop valve 141, a second stop valve 142, a third stop valve 143, a fourth stop valve 144, a first pressure regulating valve 148 and a second pressure regulating valve 149. The detection component 150 includes a first pressure gauge 151, a second pressure gauge 152 and a first flow meter 153. The first stop valve 141, the first pressure regulating valve 148 and the first pressure gauge 151 are arranged on the first connecting pipe 131 between the first gas transmission device 110 and the first connecting port. The second stop valve 142, the second pressure regulating valve 149 and the second pressure gauge 152 are arranged on the first connecting pipe 131 between the second gas transmission device 120 and the first connecting port. The third stop valve 143 is arranged on the third connecting pipe 133. The fourth stop valve 144 and the first flow meter 153 are arranged on the fourth connecting pipe 134. The components are configured to be connected to the second end of the second connecting pipe 132 or the fourth connecting pipe 134 for testing.

[0045] When the component pressure measuring device 100 provided in the embodiment of the utility model performs a low-pressure test on the component, the component to be tested can be connected to the second end of the second connecting pipe 132 or the fourth connecting pipe 134, the first stop valve 141 can be opened, the second stop valve 142 can be closed, and the air pressure can be adjusted to a required value through the first pressure regulating valve 148; when performing a high-pressure test, the second stop valve 142 can be opened, the first stop valve 141 can be closed, and the air pressure can be adjusted to a required value through the second pressure regulating valve 149; the switching process is very convenient, and the test efficiency is improved, wherein the third stop valve 143 can control the on-off of the third connecting pipe 133 to release pressure through the third connecting pipe 133, thereby improving the safety of the measuring device 100, and the fourth stop valve 144 can control the on-off of the first flowmeter 153 to measure the flow passing through the component to be tested through the first flowmeter 153, thereby testing the corresponding performance.

[0046] In the above embodiment, the range of the second pressure gauge 152 can be made larger than the range of the first pressure gauge 151. It can be understood that since the second preset air pressure is greater than the first preset air pressure, making the range of the second pressure gauge 152 larger than the range of the first pressure gauge 151 can make the range of the pressure gauge better adapt to the air pressure of the pipeline, thereby improving the reliability of the pressure gauge.

[0047] In the above embodiment, the valve group 140 may further include a first pressure reducing valve 1410 and a second pressure reducing valve 1411 disposed on the first connecting pipe 131. In the direction from the first gas delivery device 110 to the first connecting port, the first stop valve 141, the first pressure reducing valve 1410, the first pressure regulating valve 148 and the first pressure gauge 151 are disposed in sequence. In the direction from the second gas delivery device 120 to the first connecting port, the second stop valve 142, the second pressure reducing valve 1411, the second pressure regulating valve 149 and the second pressure gauge 152 are disposed in sequence. The first pressure reducing valve 1410 and the second pressure reducing valve 1411 can reduce the air pressure of the pipeline to a level slightly greater than the preset air pressure, and then fine-tune the pressure through the pressure regulating valve so that the air pressure reaches the preset air pressure. This method of regulating the air pressure is not only more accurate, but also helps to protect the pressure regulating valve and prevent the pressure regulating valve from being subjected to excessive pressure.

[0048] In the above embodiment, the valve group 140 may further include a first one-way valve 1412 disposed on the first connecting pipe 131, the first one-way valve 1412 is located between the first pressure gauge 151 and the first connecting port, and the one-way valve is conducted toward the first connecting port. The first one-way valve 1412 can prevent the gas in the high-pressure pipeline (the pipeline between the second gas delivery device 120 and the first connecting port) from flowing back to the low-pressure pipeline (the pipeline between the first gas delivery device 110 and the first connecting port) through the first connecting port, thereby protecting the components disposed on the low-pressure pipeline.

[0049] In the above embodiment, the valve group 140 may further include a fifth stop valve 145 and a sixth stop valve 146 disposed on the first connecting pipe 131, the fifth stop valve 145 being located between the first pressure gauge 151 and the first check valve 1412, and the sixth stop valve 146 being located between the second pressure gauge 152 and the first connecting port. By operating the fifth stop valve 145 and the sixth stop valve 146, the gas in the low-pressure pipeline and the high-pressure pipeline may be further prevented from interfering with each other, thereby improving the stability of the gas pressure in the low-pressure pipeline and the high-pressure pipeline.

[0050] In the above embodiment, a first gas storage container 160 and a second gas storage container 170 disposed on the first connecting pipe 131 may also be included, the first gas storage container 160 is located between the first pressure reducing valve 1410 and the first pressure regulating valve 148, and the second gas storage container 170 is located between the second pressure reducing valve 1411 and the second pressure regulating valve 149. The first gas storage container 160 and the second gas storage container 170 can play a role in stabilizing pressure, reduce the fluctuation amplitude of the air pressure of the low-pressure pipeline and the high-pressure pipeline, and improve the stability of the pressure.

[0051] In the above embodiment, the valve group 140 may further include a seventh stop valve 147, and the detection assembly 150 may further include a second flow meter 154. The seventh stop valve 147 and the second flow meter 154 are arranged on the fourth connecting pipe 134, and a third connection port is provided between the two ends of the fourth connecting pipe 134. The fourth stop valve 144 and the first flow meter 153 are located between the first end and the third connection port of the fourth connecting pipe 134, and the seventh stop valve 147 and the second flow meter 154 are located between the second end and the third connection port of the fourth connecting pipe 134. It can be understood that the seventh stop valve 147 controls the connection or disconnection of the second flow meter 154, so that the flow can be measured by the first flow meter 153 or the second flow meter 154. Such a design can increase the fault tolerance rate. When the first flow meter 153 or the second flow meter 154 fails, another flow meter can be used for measurement. In addition, two different measurements can be performed by the first flow meter 153 and the second flow meter 154 to improve the measurement accuracy.

[0052] In the above embodiment, the range of the second flow meter 154 may be smaller than the range of the first flow meter 153. It is understood that when a larger flow test is performed, the flow rate can be measured by the first flow meter 153 with a larger range, and when a smaller flow test is performed, the flow rate can be measured by the second flow meter 154 with a smaller range, thereby improving the accuracy of flow measurement.

[0053] In the above embodiment, the first gas delivery device 110 may include an air compressor, and the second gas delivery device 120 may include a nitrogen storage device. The air compressor can generally provide low-pressure gas between 2 bar and 3 MPa, and the nitrogen storage device can provide high-pressure gas exceeding 3 MPa. Both the air compressor and the nitrogen storage device have the advantages of low cost and easy acquisition, and have a high cost performance.

[0054] In the above embodiment, the valve group 140 may further include a second one-way valve disposed on the first connecting pipe 131, and the second one-way valve is located between the sixth stop valve 146 and the first connecting port. The second one-way valve can prevent the gas in the low-pressure pipeline from flowing back into the high-pressure pipeline through the first connecting port, thereby preventing the gas in the low-pressure pipeline from mixing with the gas in the high-pressure pipeline to cause unstable gas pressure.

[0055] Here are some specific examples of component performance testing:

[0056] The measured component can be specifically an electronic expansion valve, and the test items include flow curve, internal leakage and valve opening pressure difference test:

[0057] When testing the flow curve of the electronic expansion valve, you can follow Figure 1 As shown in the figure, the electronic expansion valve sample 200 is connected between the second end of the second connecting pipe 132 and the fourth connecting pipe 134, the air compressor introduces 0.8MPa compressed air, the first stop valve 141 is opened, and the air pressure is reduced to slightly higher than 2bar by adjusting the first pressure reducing valve 1410, and the first pressure regulating valve 148 is adjusted to make the pressure of the first pressure gauge 151 2bar, and the electronic expansion valve is opened according to the number of motor steps as required, the fourth stop valve 144 is opened, the reading of the first flow meter 153 is read, and the flow corresponding to the outlet of the electronic expansion valve under different step numbers is recorded.

[0058] When conducting an internal leakage test on an electronic expansion valve, Figure 1 As shown in , the electronic expansion valve sample 200 is connected between the second end of the second connecting pipe 132 and the fourth connecting pipe 134, and the nitrogen storage can be fed with 13.5MPa nitrogen. The second stop valve 142 is opened, and the second pressure reducing valve 1411 is adjusted to make the air pressure slightly greater than 1MPa. The second pressure regulating valve 149 is adjusted to adjust the pressure of the second pressure gauge 152 to 1MPa. The sixth stop valve 146 is opened, and the electronic expansion valve is kept in a closed state. The seventh stop valve 147 is opened, and the value of the second flow meter 154 (small range) is read, which is the internal leakage value of the electronic expansion valve. After the test is completed, the second stop valve 142 is closed first, and the third stop valve 143 is opened. The pressure in the sample 200 and the pipeline is released before the sample 200 is disassembled.

[0059] When testing the pressure difference of the electronic expansion valve, you can follow the Figure 1 As shown in the figure, the electronic expansion valve sample 200 is connected between the second end of the second connecting pipe 132 and the fourth connecting pipe 134, the air compressor introduces 0.8MPa compressed air, the first stop valve 141 is opened, and the air pressure is reduced to slightly higher than 2bar by adjusting the first pressure reducing valve 1410, and the first pressure regulating valve 148 is adjusted to make the pressure of the first pressure gauge 151 1bar, the electronic expansion valve is opened by 30%, the fourth stop valve 144 is opened, and the reading of the first flow meter 153 (large range) is 1, the electronic expansion valve of the sample 200 is closed, and the first stop valve 141 is closed; 13.5MPa of nitrogen can be introduced into the nitrogen storage. a of nitrogen, open the second stop valve 142, adjust the second pressure reducing valve 1411 to make the air pressure slightly greater than 2.8 MPa, adjust the second pressure regulating valve 149 to adjust the pressure of the second pressure gauge 152 to 2.8 MPa, open the sixth stop valve 146, keep the fourth stop valve 144 in an open state, fully open the electronic expansion valve and then fully close it, close the second stop valve 142, open the first stop valve 141, make the pressure of the first pressure gauge 151 still be 2 bar, open the electronic expansion valve again by 30%, read the reading 2 of the first flow meter 153 (large range), calculate (reading 2-reading 1) / reading 1 to see if it is less than 5%.

[0060] In addition, the components can also be tested for pressure resistance, water testing, air pressure bursting, and air leakage rate and air tightness:

[0061] When conducting pressure and water testing on components, Figure 2 The sample 200 is connected in the manner shown in , and the outlet of the sample 200 is blocked and not connected to the flow meter. If a pressure resistance test or water inspection test is performed at a pressure lower than 0.8 MPa, the air compressor can be used to pass 0.8 MPa compressed air, the first stop valve 141 can be opened, and the air pressure can be reduced to a value slightly higher than the target pressure by adjusting the first pressure reducing valve 1410, and the first pressure regulating valve 148 can be adjusted to make the pressure of the first pressure gauge 151 the target value. If a pressure resistance test is performed, the pressure is maintained to observe the state of the sample 200. If a water inspection test is performed, the sample 200 is immersed in water to observe whether there is any bubble leakage in the sample 200. After the test is completed, the first stop valve 141 can be closed first, and the third stop valve can be opened to release the pressure in the sample 200 and the pipeline before disassembling the sample 200. If a pressure resistance test or water inspection test is performed at a pressure higher than 0.8 MPa, a high-pressure pipeline system (air supply through a nitrogen storage device) is used for the test. The test method is the same as that of the low-pressure pipeline (air supply through an air compressor), which will not be repeated here.

[0062] When conducting a gas pressure burst test on a component, Figure 2As shown in the figure, connect the sample 200, block the outlet of the sample 200, and do not connect the sample 200 to the flow meter. If the burst pressure test is lower than 0.8MPa, 0.8MPa compressed air can be introduced through the air compressor, the first stop valve 141 can be opened, the first pressure reducing valve 1410 and the first pressure regulating valve 148 can be adjusted, and the value of the first pressure gauge 151 can be slowly increased until the sample 200 ruptures, and the pressure value before the burst is recorded. If the burst pressure test is higher than 0.8MPa, a high-pressure pipeline system is used for the test, and the test method is the same as that of the low-pressure pipeline.

[0063] When conducting air leakage rate and air tightness test, Figure 3 The sample 200 is connected in the manner shown in the figure, the inlet of the sample 200 is connected to the outlet of the flow meter, the outlet of the sample 200 is blocked, 0.8 MPa compressed air can be introduced through the air compressor, the first stop valve 141 is opened, the fourth stop valve 144 and the seventh stop valve 147 are opened, the air pressure is reduced to a value slightly higher than the target pressure by adjusting the first pressure reducing valve 1410, the first pressure regulating valve 148 is adjusted to make the pressure of the first pressure gauge 151 the target value, and after the pressure inside the sample 200 and the pipeline is stable, the fourth stop valve 144 is slowly closed, so that the sample 200 is connected only to the first flow meter 153, and the pressure and airflow inside the system are stable. If there is a leak in the sample 200, the airflow passes through the first flow meter 153 to supplement the pressure of the sample 200, and the reading of the first flow meter 153 is the leakage rate of the sample 200. After the test, the first stop valve 141 can be closed first, and then the third stop valve 143 can be opened to release the pressure inside the sample 200 and the pipeline before disassembling the sample 200.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, 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 utility model.

Claims

1. A component pressure measuring device, characterized in that: It includes a first gas delivery device, a second gas delivery device, a connecting pipe group, a valve group and a detection component; The connecting pipe group includes a first connecting pipe, a second connecting pipe, a third connecting pipe and a fourth connecting pipe, the first gas delivery device is connected to the first end of the first connecting pipe to inject gas of a first preset pressure into the first connecting pipe, the second gas delivery device is connected to the second end of the first connecting pipe to inject gas of a second preset pressure into the first connecting pipe, the second preset pressure is greater than the first preset pressure, a first connecting port is provided between the two ends of the first connecting pipe, a first end of the second connecting pipe is connected to the first connecting port, a second connecting port is provided between the two ends of the second connecting pipe, and one end of the third connecting pipe is connected to the second connecting port; The valve group includes a first stop valve, a second stop valve, a third stop valve, a fourth stop valve, a first pressure regulating valve and a second pressure regulating valve, the detection component includes a first pressure gauge, a second pressure gauge and a first flow meter, the first stop valve, the first pressure regulating valve and the first pressure gauge are arranged on the first connecting pipe between the first gas transmission device and the first connecting port, the second stop valve, the second pressure regulating valve and the second pressure gauge are arranged on the first connecting pipe between the second gas transmission device and the first connecting port, the third stop valve is arranged on the third connecting pipe, the fourth stop valve and the first flow meter are arranged on the fourth connecting pipe, and the components are configured to be connected to the second end of the second connecting pipe or the fourth connecting pipe for testing.

2. The component pressure measuring device according to claim 1, characterized in that: The measuring range of the second pressure gauge is greater than the measuring range of the first pressure gauge.

3. The component pressure measuring device according to claim 2, characterized in that: The valve group further includes a first pressure reducing valve and a second pressure reducing valve disposed on the first connecting pipe; In the direction from the first gas delivery device to the first connection port, the first stop valve, the first pressure reducing valve, the first pressure regulating valve and the first pressure gauge are arranged in sequence; In the direction from the second gas delivery device to the first connecting port, the second stop valve, the second pressure reducing valve, the second pressure regulating valve and the second pressure gauge are arranged in sequence.

4. The component pressure measuring device according to claim 3, characterized in that: The valve group further includes a first one-way valve disposed on the first connecting pipe, the first one-way valve is located between the first pressure gauge and the first connecting port, and the first one-way valve is conductive toward the first connecting port.

5. The component pressure measuring device according to claim 4, characterized in that: The valve group further includes a fifth stop valve and a sixth stop valve disposed on the first connecting pipe, the fifth stop valve being located between the first pressure gauge and the first one-way valve, and the sixth stop valve being located between the second pressure gauge and the first connecting port.

6. The component pressure measuring device according to claim 5, characterized in that: It also includes a first gas storage container and a second gas storage container arranged on the first connecting pipe, the first gas storage container is located between the first pressure reducing valve and the first pressure regulating valve, and the second gas storage container is located between the second pressure reducing valve and the second pressure regulating valve.

7. The component pressure measuring device according to claim 6, characterized in that: The valve group further includes a seventh stop valve, the detection assembly further includes a second flow meter, and the seventh stop valve and the second flow meter are arranged on the fourth connecting pipe; There is a third connecting port between the two ends of the fourth connecting pipe, the fourth stop valve and the first flow meter are located between the first end of the fourth connecting pipe and the third connecting port, and the seventh stop valve and the second flow meter are located between the second end of the fourth connecting pipe and the third connecting port.

8. The component pressure measuring device according to claim 7, characterized in that: The measuring range of the second flow meter is smaller than the measuring range of the first flow meter.

9. The component pressure measuring device according to any one of claims 1 to 8, characterized in that: The first gas delivery device includes an air compressor, and the second gas delivery device includes a nitrogen storage device.

10. The component pressure measuring device according to any one of claims 5 to 8, characterized in that: The valve group further includes a second one-way valve disposed on the first connecting pipe, the second one-way valve is located between the sixth stop valve and the first connecting port, and the second one-way valve is connected toward the first connecting port.

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