Withstand voltage testing device

Abstract

The utility model relates to a withstand voltage test device. The withstand voltage test device comprises a negative pressure test assembly; a positive pressure test assembly; a main pipeline, a first branch and a second branch, one end of the main pipeline is connected with a workpiece to be tested, the other end of the main pipeline is connected with the negative pressure testing assembly through the first branch, and the other end of the main pipeline is further connected with the positive pressure testing assembly through the second branch; wherein under the condition that the to-be-tested workpiece is subjected to the pressure resistance test, the to-be-tested workpiece can be subjected to the negative pressure test through the negative pressure test assembly, and / or the to-be-tested workpiece can be subjected to the positive pressure test through the positive pressure test assembly. According to the pressure resistance testing device, the negative pressure testing assembly and the positive pressure testing assembly are integrated, positive pressure testing and negative pressure testing can be conducted on the workpiece to be tested through the same pressure resistance testing device, the pressure resistance of the workpiece to be tested can be obtained more comprehensively, the practicability of the pressure resistance testing device is higher, and the integration degree of the pressure resistance testing device can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of withstand voltage testing equipment, and particularly to a withstand voltage testing device. Background Art

[0002] At present, according to the reliability requirements of radiators, radiators must withstand a certain pressure without failure leakage during the warranty period. Traditional pressure test benches can only simulate tests of radiators under positive pressure, and cannot comprehensively test the withstand voltage performance of radiators, providing little guidance for the design and development of radiators. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a withstand voltage testing device to address the problem of the inability to comprehensively test the withstand voltage performance of radiators.

[0004] A withstand voltage testing device includes:

[0005] A negative pressure testing component;

[0006] A positive pressure testing component;

[0007] A main pipeline, a first branch pipeline, and a second branch pipeline. One end of the main pipeline is connected to a workpiece to be tested, the other end of the main pipeline is connected to the negative pressure testing component through the first branch pipeline, and the other end of the main pipeline is also connected to the positive pressure testing component through the second branch pipeline;

[0008] Wherein, when the workpiece to be tested is subjected to a withstand voltage test, the negative pressure testing component can perform a negative pressure test on the workpiece to be tested, and / or the positive pressure testing component can perform a positive pressure test on the workpiece to be tested.

[0009] The above withstand voltage testing device integrates a negative pressure testing component and a positive pressure testing component. The positive pressure and negative pressure tests can be performed on the workpiece to be tested through the same withstand voltage testing device, enabling more comprehensive acquisition of the withstand voltage performance of the workpiece to be tested, enhancing the practicality of the withstand voltage testing device, and facilitating the improvement of the integration level of the withstand voltage testing device.

[0010] In one embodiment, the negative pressure testing component includes a first control valve, and the first control valve is arranged on the first branch pipeline and used to control the opening and closing of the first branch pipeline; the positive pressure testing component includes a second control valve, and the second control valve is arranged on the second branch pipeline and used to control the opening and closing of the second branch pipeline; during the negative pressure test, the first control valve is opened and the second control valve is closed; during the positive pressure test, the first control valve is closed and the second control valve is opened.

[0011] In one embodiment, the negative pressure test assembly further includes a negative pressure unit for generating negative pressure, and the negative pressure unit is connected to one end of the first branch away from the main pipeline.

[0012] In one embodiment, the negative pressure test assembly further includes a third control valve, and the third control valve is arranged in the first branch; in the case of maintaining the negative pressure unit, the third control valve is configured to cooperate with the first control valve to control the opening and closing of the first branch.

[0013] In one embodiment, the pressure resistance test device further includes a pressure relief branch and a fourth control valve. The pressure relief branch is communicated with the first branch and is used for pressure relief, and the fourth control valve is arranged in the pressure relief branch and is used for controlling the opening and closing of the pressure relief branch.

[0014] In one embodiment, at least one of the first control valve, the second control valve, the third control valve and the fourth control valve is an electromagnetic stop valve.

[0015] In one embodiment, the negative pressure test assembly further includes at least two filters, and each filter is arranged in parallel and / or in series in the first branch and is used for filtering impurities.

[0016] In one embodiment, the positive pressure test assembly includes a positive pressure supply member for generating positive pressure, and the positive pressure supply member is connected to the other end of the main pipeline through the second branch.

[0017] In one embodiment, the positive pressure test assembly further includes a throttle valve, and the throttle valve is arranged in the second branch and is used for adjusting the air flow velocity in the second branch.

[0018] In one embodiment, the positive pressure test assembly further includes a pressure regulating valve and a first pressure detection member arranged in the second branch. The first pressure detection member is used for measuring the air pressure in the second branch, and the pressure regulating valve is used for adjusting the air pressure in the second branch according to the detection result of the first pressure detection member.

[0019] In one embodiment, the pressure resistance test device further includes a second pressure detection member, and the second pressure detection member is arranged in the main pipeline and is used for measuring the air pressure in the main pipeline. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of a pressure resistance test device in some embodiments.

[0021] Reference Signs:

[0022] 10. Workpiece to be measured; 100. Negative pressure test assembly; 110. First control valve; 120. Negative pressure unit; 130. Third control valve; 140. Filter; 200. Positive pressure test assembly; 210. Second control valve; 220. Positive pressure supply component; 230. Throttle valve; 240. Pressure regulating valve; 250. First pressure detector; 300. Main pipeline; 400. First branch; 500. Second branch; 600. Pressure relief branch; 700. Fourth control valve; 800. Second pressure detector. Detailed implementation manners

[0023] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0024] 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", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0026] In the present application, unless otherwise clearly specified and limited, the terms "initial", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0027] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0028] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0029] Please refer to Figure 1 , the pressure resistance testing device in an embodiment includes a negative pressure testing component 100, a positive pressure testing component 200, a main pipeline 300, a first branch pipeline 400 and a second branch pipeline 500. One end of the main pipeline 300 is connected to the workpiece 10 to be tested, the other end of the main pipeline 300 is connected to the negative pressure testing component 100 through the first branch pipeline 400, and the other end of the main pipeline 300 is also connected to the positive pressure testing component 200 through the second branch pipeline 500.

[0030] Wherein, in the case of performing a pressure resistance test on the workpiece 10 to be tested, the negative pressure test on the workpiece 10 to be tested can be performed through the negative pressure testing component 100, and / or the positive pressure test on the workpiece 10 to be tested can be performed through the positive pressure testing component 200.

[0031] It should be noted that in the case of performing a pressure resistance test on the workpiece 10 to be tested, the negative pressure test on the workpiece 10 to be tested can be performed through the negative pressure testing component 100, and / or the positive pressure test on the workpiece 10 to be tested can be performed through the positive pressure testing component 200, which can be understood as: in the case of performing a pressure resistance test on the workpiece 10 to be tested, only a negative pressure test or a positive pressure test can be performed, or the negative pressure test and the positive pressure test can be performed in sequence.

[0032] Optionally, the workpiece 10 to be tested is a radiator. The principle of the radiator is to use external cold air to reduce the temperature of the coolant from the engine in the radiator to prevent the engine from overheating and being damaged. Therefore, the pressure resistance performance of the radiator is very important. When performing a pressure resistance test on the workpiece 10 to be tested, the negative pressure test assembly 100 can perform a negative pressure test on the workpiece 10 to be tested, so as to quickly obtain the negative pressure resistance performance inside the workpiece 10 to be tested; in addition, the positive pressure test assembly 200 can also perform a positive pressure test on the workpiece 10 to be tested, so as to quickly obtain the positive pressure resistance performance outside the workpiece 10 to be tested.

[0033] The above-mentioned pressure resistance test device integrates a negative pressure test assembly 100 and a positive pressure test assembly 200. The positive pressure and negative pressure tests can be performed on the workpiece 10 to be tested through the same pressure resistance test device, so that the pressure resistance performance of the workpiece 10 to be tested can be obtained more comprehensively, the practicability of the pressure resistance test device is stronger, and it is beneficial to improve the integration degree of the pressure resistance test device.

[0034] In the embodiment of the present application, one end of the main pipeline 300 is connected to the workpiece 10 to be tested, and the other end of the main pipeline 300 is connected to the first branch pipeline 400; or one end of the main pipeline 300 is connected to the workpiece 10 to be tested, and the other end of the main pipeline 300 is communicated with the second branch pipeline 500. That is, the other end of the main pipeline 300 is alternatively communicated with the second branch pipeline 500 and the first branch pipeline 400. The second branch pipeline 500 and the first branch pipeline 400 are different branch pipelines and are not communicated with each other, so that the positive pressure test assembly 200 and the negative pressure test assembly 100 will not interfere with each other during the test.

[0035] Specifically, please refer to Figure 1 , when performing a pressure resistance test on the workpiece 10 to be tested, first perform a negative pressure test on the workpiece 10 to be tested through the negative pressure test assembly 100, and then perform a positive pressure test on the workpiece 10 to be tested through the positive pressure test assembly 200.

[0036] It can be understood that first generate a negative pressure through the negative pressure test assembly 100 to extract the air inside the workpiece 10 to be tested to the negative pressure test assembly 100 and then keep the pressure, so as to obtain the negative pressure resistance performance parameters of the workpiece 10 to be tested; then generate a positive pressure through the positive pressure test assembly 200 to inflate the inside of the workpiece 10 to be tested to restore it to the atmospheric pressure and then keep the pressure, so as to obtain the positive pressure resistance performance parameters of the workpiece 10 to be tested. In this way, the negative pressure and positive pressure tests can be continuously performed on the workpiece 10 to be tested, the test is convenient, and the pressure resistance test efficiency can be effectively improved, and the pressure resistance test time can be shortened.

[0037] In the embodiments of the present application, the number of negative pressure tests and positive pressure tests is not limited to one. For example, when the number of both the negative pressure test and the positive pressure test is one, the negative pressure test and the positive pressure test are each carried out once in sequence; for another example, when the number of both the negative pressure test and the positive pressure test is at least two, the negative pressure test and the positive pressure test can be carried out alternately in sequence, that is, in a cycle according to the pattern of negative pressure test, positive pressure test, negative pressure test, positive pressure test... to improve the accuracy of the test results.

[0038] Please refer to Figure 1 , the negative pressure test assembly 100 includes a first control valve 110, and the first control valve 110 is arranged in the first branch 400 and is used to control the opening and closing of the first branch 400; the positive pressure test assembly 200 includes a second control valve 210, and the second control valve 210 is arranged in the second branch 500 and is used to control the opening and closing of the second branch 500; when performing a negative pressure test, the first control valve 110 is opened and the second control valve 210 is closed; when performing a positive pressure test, the first control valve 110 is closed and the second control valve 210 is opened.

[0039] It can be understood that when performing a negative pressure test, the first control valve 110 is opened and the second control valve 210 is closed, the first branch 400 is opened and the second branch 500 is closed, and the negative pressure test assembly 100 can generate a negative pressure in the first branch 400 and the main pipeline 300, so that the air inside the workpiece 10 to be tested is pumped out to the negative pressure test assembly 100;

[0040] When performing a positive pressure test, the first control valve 110 is closed and the second control valve 210 is opened, the first branch 400 is closed and the second branch 500 is opened, and the positive pressure test assembly 200 can generate a positive pressure in the first branch 400 and the main pipeline 300, so as to inflate the inside of the workpiece 10 to be tested to restore it to atmospheric pressure.

[0041] Further, please refer to Figure 1 , the negative pressure test assembly 100 further includes a negative pressure unit 120 for generating negative pressure, and the negative pressure unit 120 is connected to the other end of the main pipeline 300 through the first branch 400.

[0042] It should be noted that one end of the first branch 400 is connected to the negative pressure unit 120, and the other end of the first branch 400 is connected to the other end of the main pipeline 300. When performing a negative pressure test, the negative pressure test assembly 100 can generate a negative pressure in the first branch 400 and the main pipeline 300, so that the air inside the workpiece 10 to be tested is pumped out to the negative pressure test assembly 100.

[0043] In an embodiment of the present application, the negative pressure unit 120 is a vacuum unit, that is, the negative pressure unit 120 can create a negative pressure in the first branch 400 and the main pipeline 300 by means of vacuum pumping. In addition, the negative pressure unit 120 can also have a built-in pressure regulating function. For example, the negative pressure unit 120 realizes the pressure regulating function through a built-in needle valve. That is, when there is a deviation between the negative pressure value generated by the negative pressure unit 120 and the preset negative pressure value, the negative pressure unit 120 can relieve pressure through the built-in needle valve of the negative pressure unit 120, so that the negative pressure value generated by the negative pressure unit 120 matches the preset negative pressure value.

[0044] In an embodiment of the present application, the number of the negative pressure units 120 is not limited to one. For example, when the number of the negative pressure units 120 is at least two, the negative pressure units 120 are arranged in one-to-one correspondence with the first branches 400, and after the first branches 400 are gathered, they are connected to the other end of the main pipeline 300.

[0045] Furthermore, please refer to Figure 1 , the negative pressure test assembly 100 further includes a third control valve 130. The third control valve 130 is arranged in the first branch 400 and is located between the negative pressure unit 120 and the first control valve 110; in the case where the negative pressure unit 120 is under maintenance, the third control valve 130 is configured to cooperate with the first control valve 110 to control the opening and closing of the first branch 400.

[0046] It can be understood that the third control valve 130 is located between the negative pressure unit 120 and the first control valve 110. When the negative pressure unit 120 is under maintenance, the first control valve 110 is closed, and the third control valve 130 can be further closed to prevent the dirt in the negative pressure unit 120 from flowing to the first control valve 110; when the maintenance of the negative pressure unit 120 is completed, the third control valve 130 can be opened. At this time, the first control valve 110 can be closed or opened, and the opening and closing of the first control valve 110 are adjusted according to the actual situation.

[0047] Please refer to Figure 1 , the pressure resistance test device further includes a pressure relief branch 600 and a fourth control valve 700. The pressure relief branch 600 is communicated with the first branch 400 and is used for pressure relief. The fourth control valve 700 is arranged in the pressure relief branch 600 and is used for controlling the opening and closing of the pressure relief branch 600.

[0048] It can be understood that when there is a deviation between the negative pressure value generated by the negative pressure unit 120 and the preset negative pressure value, the pressure can also be relieved through the pressure relief branch 600, so that the negative pressure value generated by the negative pressure unit 120 matches the preset negative pressure value.

[0049] Among them, when pressure relief is carried out, the fourth control valve 700 is opened to make the pressure relief branch 600 communicate with the first branch 400; when pressure relief is not carried out, the fourth control valve 700 is closed to make the pressure relief branch 600 not communicate with the first branch 400.

[0050] Specifically, in the embodiments of the present application, please refer to Figure 1 , at least one of the first control valve 110, the second control valve 210, the third control valve 130 and the fourth control valve 700 is an electromagnetic cut-off valve.

[0051] Here, the electromagnetic cut-off valve can be understood as a device that controls the opening and closing of the valve using electromagnetic force. Optionally, the expansion and contraction of the cylinder can be controlled by electromagnetic force to achieve the opening and closing of the valve, so that the automatic opening and closing of each control valve can be realized, which is beneficial to improving the automation degree of the pressure resistance testing device.

[0052] It should be noted that all of the first control valve 110, the second control valve 210, the third control valve 130 and the fourth control valve 700 can be electromagnetic cut-off valves; or, a part of the first control valve 110, the second control valve 210, the third control valve 130 and the fourth control valve 700 is an electromagnetic cut-off valve, and the remaining of the first control valve 110, the second control valve 210, the third control valve 130 and the fourth control valve 700 can also be valves with the function of controlling the opening and closing of the branch circuit, such as ball valves, thermostatic expansion valves, reversing valves, etc.

[0053] Please refer to Figure 1 , the negative pressure test assembly 100 further includes at least two filters 140, and each filter 140 is arranged in parallel and / or in series on the first branch 400 and is used for filtering impurities.

[0054] It should be noted that each filter 140 is arranged in parallel on the first branch 400, which can be understood as: each filter 140 is respectively located on different connecting branches, and each connecting branch is connected in parallel to the first branch 400; each filter 140 is arranged in series on the first branch 400, which can be understood as: each filter 140 is located on the same connecting branch and is connected to the first branch 400 through the same connecting branch. In this way, when a certain filter 140 is damaged, the other remaining filters 140 can be used for filtering, and impurities in the first branch 400 can be better prevented from entering the negative pressure unit 120 during the negative pressure test.

[0055] In the embodiments of the present application, each filter 140 is arranged in parallel and / or in series on the first branch 400, that is, each filter 140 can only be arranged in parallel, or only in series, or both in series and in parallel. In other embodiments, only one filter 140 can also be provided on the first branch 400, or two or more filters 140 can be arranged in series.

[0056] In the embodiments of the present application, the sizes and types of each filter 140 are the same, so as to facilitate batch assembly. In other embodiments, the sizes and types of each filter 140 can also be different.

[0057] In an embodiment of the present application, each filter 140 has a filter mesh inside. The filter mesh has a number of filter holes. During the negative pressure test, after the gas flows through the filter holes, it then enters the negative pressure unit 120, which can prevent impurities in the first branch 400 from entering the negative pressure unit 120.

[0058] Please refer to Figure 1 , the positive pressure test assembly 200 includes a positive pressure supply member 220 for generating positive pressure. The positive pressure supply member 220 is connected to the other end of the main pipeline 300 through a second branch 500.

[0059] It should be noted that one end of the second branch 500 is connected to the positive pressure supply member 220, and the other end of the second branch 500 is connected to the other end of the main pipeline 300. During the positive pressure test, the positive pressure test assembly 200 can generate positive pressure in the second branch 500 and the main pipeline 300, so as to inflate the workpiece 10 to be tested to restore it to atmospheric pressure.

[0060] In an embodiment of the present application, the positive pressure supply member 220 is a component capable of providing compressed air. That is, the positive pressure supply member 220 generates positive pressure in the first branch 400 and the main pipeline 300 by filling compressed air into them.

[0061] In an embodiment of the present application, the number of the positive pressure supply members 220 is not limited to one. For example, when the number of the positive pressure supply members 220 is at least two, the positive pressure supply members 220 are arranged in one-to-one correspondence with the second branches 500, and after the second branches 500 are gathered, they are connected to the other end of the main pipeline 300.

[0062] Specifically, please refer to Figure 1 , the positive pressure test assembly 200 further includes a throttle valve 230. The throttle valve 230 is arranged in the second branch 500 and is used to adjust the air flow rate in the second branch 500.

[0063] It can be understood that during the positive pressure test, if the air flow rate in the second branch 500 is too large, it will inflate the workpiece 10 to be tested too much, resulting in the situation that the workpiece 10 to be tested bulges, affecting the subsequent test or use of the workpiece 10 to be tested. Through the setting of the throttle valve 230, the air flow rate in the second branch 500 can be effectively adjusted, so that the air flow in the second branch 500 gently inflates into the workpiece 10 to be tested, which is beneficial to the inflation inside the workpiece 10 to be tested and gradually and gently restore it to atmospheric pressure.

[0064] In an embodiment of the present application, the type of the throttle valve 230 can be needle-shaped, groove-shaped, window-shaped, etc. The specific type of the throttle valve 230 is not limited here.

[0065] More specifically, please refer to Figure 1, the positive pressure test assembly 200 further includes a pressure regulating valve 240 and a first pressure detector 250 disposed in the second branch 500. The first pressure detector 250 is configured to measure the air pressure in the second branch 500, and the pressure regulating valve 240 is configured to adjust the air pressure in the second branch 500 according to the detection result of the first pressure detector 250.

[0066] It can be understood that during the positive pressure test, it is necessary to timely control the air pressure in the second branch 500 to prevent the test workpiece 10 from bulging due to untimely control, which may affect the subsequent test or use of the test workpiece 10. Through the cooperation of the pressure regulating valve 240 and the first pressure detector 250, the air pressure in the second branch 500 can be timely adjusted.

[0067] For example, the air pressure in the second branch 500 is measured by the first pressure detector 250. When the air pressure in the second branch 500 is relatively low, the air pressure in the second branch 500 can be increased by the pressure regulating valve 240; when the air pressure in the second branch 500 is relatively high, the air pressure in the second branch 500 can be decreased by the pressure regulating valve 240.

[0068] In the embodiments of the present application, the type of the pressure regulating valve 240 can be pneumatic, small flow rate pressure regulating valve, etc., and the specific type of the pressure regulating valve 240 is not limited herein.

[0069] In the embodiments of the present application, the first pressure detector 250 can be a pressure sensor or a pressure detection meter or other devices capable of performing pressure detection.

[0070] Specifically in this embodiment, please refer to Figure 1 , the voltage-withstand test device further includes a second pressure detector 800 disposed in the main pipeline 300 and configured to measure the air pressure in the main pipeline 300.

[0071] It should be noted that first, a negative pressure is generated by the negative pressure test assembly 100 to extract the air inside the test workpiece 10 to the negative pressure test assembly 100 and then the pressure is maintained. At this time, the air pressure in the main pipeline 300 can be measured to determine the negative pressure resistance performance of the test workpiece 10; then a positive pressure is generated by the positive pressure test assembly 200 to inflate the inside of the test workpiece 10 to return it to the atmospheric pressure and then the pressure is maintained. At this time, the air pressure in the main pipeline 300 can be measured again to determine the positive pressure resistance performance of the test workpiece 10.

[0072] In the embodiments of the present application, the second pressure detector 800 is a pressure detection meter or other devices capable of measuring the pressure value.

[0073] In other embodiments, the second pressure detector 800 can also be disposed on the test workpiece 10 or at other positions in the first branch 400 to facilitate monitoring the air pressure of the test workpiece 10 or different positions.

[0074] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0075] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A withstand voltage test device, characterized in that, Comprising: A negative pressure test assembly (100); A positive pressure test assembly (200); A main pipeline (300), a first branch pipeline (400) and a second branch pipeline (500), one end of the main pipeline (300) is connected to a workpiece to be tested (10), the other end of the main pipeline (300) is connected to the negative pressure test assembly (100) through the first branch pipeline (400), and the other end of the main pipeline (300) is also connected to the positive pressure test assembly (200) through the second branch pipeline (500); Wherein, when the workpiece to be tested (10) is subjected to a pressure resistance test, the negative pressure test assembly (100) can be used to perform a negative pressure test on the workpiece to be tested (10), and / or the positive pressure test assembly (200) can be used to perform a positive pressure test on the workpiece to be tested (10).

2. The voltage withstand test device according to claim 1, wherein The negative pressure test assembly (100) includes a first control valve (110), the first control valve (110) is arranged on the first branch pipeline (400) and is used to control the opening and closing of the first branch pipeline (400); the positive pressure test assembly (200) includes a second control valve (210), the second control valve (210) is arranged on the second branch pipeline (500) and is used to control the opening and closing of the second branch pipeline (500); When performing a negative pressure test, the first control valve (110) is opened and the second control valve (210) is closed; when performing a positive pressure test, the first control valve (110) is closed and the second control valve (210) is opened.

3. The voltage withstand test device according to claim 2, characterized in that, The negative pressure test assembly (100) further includes a negative pressure unit (120) for generating negative pressure, and the negative pressure unit (120) is connected to the end of the first branch pipeline (400) far from the main pipeline (300).

4. The voltage withstand test device according to claim 3, characterized in that, The negative pressure test assembly (100) further includes a third control valve (130), the third control valve (130) is arranged on the first branch pipeline (400) and is located between the negative pressure unit (120) and the first control valve (110); When the negative pressure unit (120) is under maintenance, the third control valve (130) is configured to cooperate with the first control valve (110) to control the opening and closing of the first branch pipeline (400).

5. The voltage withstand test device according to claim 4, characterized in that The pressure resistance test device further includes a pressure relief branch pipeline (600) and a fourth control valve (700), the pressure relief branch pipeline (600) is communicated with the first branch pipeline (400) and is used for pressure relief, and the fourth control valve (700) is arranged on the pressure relief branch pipeline (600) and is used to control the opening and closing of the pressure relief branch pipeline (600).

6. The voltage withstand test device according to claim 5, characterized in that At least one of the first control valve (110), the second control valve (210), the third control valve (130) and the fourth control valve (700) is an electromagnetic shut-off valve.

7. The voltage withstand test device according to any one of claims 1-6, characterized in that, The negative pressure test assembly (100) further includes at least two filters (140), and each of the filters (140) is arranged in parallel and / or in series on the first branch pipeline (400) and is used for filtering impurities.

8. The pressure resistance testing device according to any one of claims 1-6, characterized in that The positive pressure test assembly (200) includes a positive pressure gas supply member (220) for generating positive pressure. The positive pressure gas supply member (220) is connected to the other end of the main pipeline (300) through the second branch (500).

9. The pressure resistance test device according to any one of claims 1-6, characterized in that, The positive pressure test assembly (200) further includes a throttle valve (230). The throttle valve (230) is provided in the second branch (500) and is used to adjust the air flow velocity in the second branch (500).

10. The voltage withstand test device according to any one of claims 1-6, characterized in that, The positive pressure test assembly (200) further includes a pressure regulating valve (240) and a first pressure detection member (250) provided in the second branch (500). The first pressure detection member (250) is used to measure the air pressure in the second branch (500), and the pressure regulating valve (240) is used to adjust the air pressure in the second branch (500) according to the detection result of the first pressure detection member (250).

11. The voltage withstand test device according to any one of claims 1-6, characterized in that The voltage-withstanding test device further includes a second pressure detection member (800). The second pressure detection member (800) is provided in the main pipeline (300) and is used to measure the air pressure in the main pipeline (300).

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