Safety test device

Abstract

The utility model discloses a safety test device, which is used for carrying out electrical safety test on a pressure switch, the pressure switch comprises a wiring terminal and a copper pipe, one end of the wiring terminal is connected with one end of the copper pipe, the other end of the copper pipe is provided with an air inlet, and the safety test device comprises an insulating support plate, the test bench is provided with a plurality of test stations for placing pressure switches; the test interface assembly is installed on the test station, the test interface assembly comprises a telescopic probe and a movable wire holder connected with the telescopic probe, the telescopic probe is connected with the air inlet, and the movable wire holder is connected with the other end of the wiring terminal and can be matched with the wiring terminal in a preset size range; and the parallel test circuit comprises two access points, and the two access points are connected with the plurality of test stations at the same time. According to the embodiment of the utility model, the electrical safety test of various pressure switches is satisfied, and the problems of low test efficiency and no universal tool are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air -used pressure switch electrical safety test technical field especially relates to a safety testing device. BACKGROUND

[0002] Pressure switch is a kind of device for controlling the circuit break in air conditioning system, and its main function is to protect compressor and other components according to the change of system pressure. Its working principle lies in that when the pressure in air conditioning system is higher or lower than the set safety pressure, the disc inside the pressure sensing plate inside the pressure switch will move instantaneously. This movement is pushed through the action of connecting guide rod, and the switch connector is disconnected, so as to cut off the circuit, ensure that air conditioning system does not continue to run in high pressure or low pressure state, prevent equipment from being damaged. Once the system pressure recovers to the rated value, the disc will be reset instantaneously, and the switch is automatically reset, and the working state is restored.

[0003] In order to ensure the electrical safety of pressure switch, it is required to carry out electrical safety test on pressure switch, which needs to be carried out according to the requirements of GB 14536.1. The specific operation of test is that sinusoidal alternating voltage is applied between the wiring terminal of pressure switch and the shell metal piece, the voltage value is 1500V, the frequency is 50Hz or 60Hz, and the setting value of leakage current is set to 1mA. The test needs to be carried out for 1 minute (or 1800V voltage can be selected as an alternative scheme, and the voltage is applied for 1 second). However, since the existing device for carrying out electrical safety test on pressure switch usually adopts single-station design, and the test station does not have universality, pressure switch can only be tested one by one, which not only is low in efficiency, but also cannot meet the test of different models of pressure switch. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of safety testing device, to solve the problems, such as low efficiency of safety testing device in prior art and lack of universality.

[0005] In order to solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0006] The utility model provides a kind of safety testing device, for carrying out electrical safety test on pressure switch, the pressure switch includes terminal and copper pipe, one end of the terminal is connected with one end of the copper pipe, the other end of the copper pipe is provided with air inlet, and the safety testing device includes:

[0007] Insulating support plate is provided with a plurality of test stations for placing the pressure switch;

[0008] A test interface assembly is installed on the test station, the test interface assembly comprises a retractable probe and a movable terminal block connected with the retractable probe, the retractable probe is connected with the air inlet, and the movable terminal block is connected with the other end of the terminal and is adapted to the terminal of a predetermined size range;

[0009] A parallel test circuit comprises two access points, which are connected with a plurality of test stations at the same time.

[0010] Optionally, the two access points comprise a first access point and a second access point, the first access point is connected with a plurality of retractable probes on the test station in parallel at the same time, and the second access point is connected with a plurality of movable terminal blocks on the test station in parallel at the same time.

[0011] Optionally, the test device further comprises a first interface and a second interface connected with the parallel test circuit, and the first interface and the second interface are connected with the first access point and the second access point respectively.

[0012] Optionally, the predetermined size range is the terminal post spacing range of the terminal, and the predetermined size range is 12-20mm.

[0013] Optionally, the retractable probe is adapted to the total height of the pressure switch in the range of 80-100mm.

[0014] Optionally, the insulating support plate is an epoxy plate.

[0015] Optionally, the epoxy plate comprises a plurality of plates, and the plates are connected through connecting pieces.

[0016] Optionally, the test station comprises at least 10.

[0017] Optionally, the movable terminal block comprises a terminal block body, a resilient piece abutting on one end of the terminal block body, and a terminal block interface abutting on the other end of the resilient piece.

[0018] Optionally, the terminal block body is provided with an access port, the terminal block interface is provided with two and is spaced apart in the access port, and the resilient piece is provided with two and is respectively arranged on the back of the two terminal block interfaces.

[0019] The utility model provides a safe testing device, the utility model embodiment sets up a plurality of test stations on the insulating support board, and is connected with a plurality of test stations through parallel test circuit, so that a plurality of pressure switch can carry out electrical safety test simultaneously, has improved test efficiency significantly, simultaneously, the design of mobile wiring seat and telescopic probe makes safe testing device can be adapted to a plurality of sizes and specifications pressure switch, solved the problem that traditional safe testing device lacks general tooling. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the utility model embodiment technical scheme, the following will be needed to use the drawing in the embodiment description simple introduction, obviously, the following description in the drawing is some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0021] Figure 1 The utility model provides a pressure switch's structural schematic diagram for embodiment of the utility model;

[0022] Figure 2 The utility model provides a safe testing device's structural schematic diagram for embodiment of the utility model;

[0023] Figure 3 The utility model provides a pressure switch and test interface assembly connection's structural schematic diagram for embodiment of the utility model;

[0024] Figure 4 The utility model provides a pressure switch installs in safe testing device's structural schematic diagram for embodiment of the utility model;

[0025] Figure 5 The utility model provides a pressure switch and epoxy board's mounting structure schematic diagram for embodiment of the utility model.

[0026] Figure identification explanation:

[0027] 100, pressure switch;101, wiring terminal;1011, terminal post;102, copper pipe;1021, gas inlet;

[0028] 200, safe testing device;201, insulating support plate;202, test interface assembly;2021, telescopic probe;2022, mobile wiring seat;203, parallel test circuit;2031, two access points;20311, first access point;20312, second access point. DETAILED DESCRIPTION

[0029] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0030] It should be understood that the terms "comprising" and "including" as used in the specification and the appended claims indicate the presence of the described features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0031] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0032] It should be further understood that the term "and / or" as used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0033] Please refer to Figures 1 to 4 The embodiment of the present application provides a safety testing device for electric safety testing of a pressure switch 100, the pressure switch 100 comprising a wiring terminal 101 and a copper pipe 102, one end of the wiring terminal 101 being connected with one end of the copper pipe 102, the other end of the copper pipe 102 being provided with an air inlet 1021, the safety testing device 200 comprising: an insulating support plate 201 provided with a plurality of test stations for placing the pressure switch 100; a test interface assembly 202 installed on the test station, the test interface assembly 202 comprising a telescopic probe 2021 and a movable terminal block 2022 connected with the telescopic probe 2021, the telescopic probe 2021 being connected with the air inlet 1021, the movable terminal block 2022 being connected with the other end of the wiring terminal 101 and being adaptable to the wiring terminal 101 within a predetermined size range; and a parallel test circuit 203 comprising two access points 2031, the two access points 2031 being connected with the plurality of test stations at the same time.

[0034] In the embodiment, multiple test stations are arranged on the insulating support plate 201, and the parallel test circuit 203 is connected to the multiple test stations, so that the multiple pressure switches 100 can be simultaneously subjected to electrical safety testing, improving the testing efficiency; meanwhile, the design of the telescopic probe 2021 and the movable terminal block 2022 enables the safety testing device 200 to be adapted to pressure switches 100 of various sizes and specifications, solving the problem of lack of universal tooling in the conventional safety testing device 200.

[0035] Further, as shown in Figure 4 The two access points 2031 include a first access point 20311 and a second access point 20312, the first access point 20311 is connected in parallel to the telescopic probes 2021 on the multiple test stations, and the second access point 20312 is connected in parallel to the movable terminal blocks 2022 on the multiple test stations.

[0036] In the embodiment, the first access point 20311 is connected in parallel to the telescopic probes 2021 on all test stations through wires or conductive sheets, forming an electrically parallel circuit. Similarly, the second access point 20312 is connected in parallel to the movable terminal blocks 2022 on all test stations, ensuring that the terminal 101 of all pressure switches 100 can be connected to the parallel test circuit 203 through the second access point 20312. Through the parallel design of the two access points, the first access point 20311 and the second access point 20312, the safety testing device 200 can simultaneously send test signals to all pressure switches 100 on the test stations, without the need for testing one by one, thereby significantly improving the testing efficiency.

[0037] Further, the test device is also included, which includes a first interface and a second interface connected to the parallel test circuit 203, and the first interface and the second interface are connected to the first access point 20311 and the second access point 20312, respectively. In the embodiment, the test device sends test signals to the parallel test circuit 203 through the first interface and the second interface, and receives test results from the parallel test circuit 203. The test device further includes a test signal processing module and a display module. The test signal processing module is used to process the test signals of the pressure switches 100 sent from the parallel test circuit 203, and at the same time, the test device can also receive the test results from the parallel test circuit 203 for further analysis and processing; the display module is used to display the test results and test parameters, and the test device can display the test results to the tester through the display module, including whether the test is passed, test time, test voltage, etc. Meanwhile, the tester can also set the test parameters, such as test voltage, test time, etc. through the display module.

[0038] Specifically, the testing equipment can be a safety gauge, which is a specialized device that can measure key parameters of electrical products such as voltage, current, insulation resistance, and grounding resistance, and is used to evaluate the safety performance of the product.

[0039] The safety testing instrument has positive and negative terminals. The first access point 20311 is set as the positive terminal, and the second access point 20312 is set as the negative terminal. The first access point 20311 is connected to the positive terminal (first interface) output of the safety testing instrument, and the second access point 20312 is connected to the negative terminal (second interface) output of the safety testing instrument. At each test station, the test interface assembly 202 (including the retractable probe 2021 and the movable terminal block 2022) is connected to the first access point 20311 and the second access point 20312 of the parallel test circuit 203 via wires, ensuring that each test station can receive the test signal from the safety testing instrument.

[0040] In a specific embodiment, the predetermined size range is the spacing range of the terminals 1011 of the terminal block 101, and the predetermined size range is 12-20mm. Specifically, as shown... Figure 1 As shown, the terminal block spacing 1011 of the pressure switch 100 is d. Different models of pressure switches 100 have different terminal block spacing d, which may be 14mm, 15mm, 16mm, or 17mm. This diversity presents a challenge to testing because traditional fixed-pitch terminal blocks cannot simultaneously meet these different spacing requirements. If the testing system is only configured with fixed-pitch (e.g., 14mm) terminal blocks, that is, if the spacing of the fixed movable terminal block is 14mm, other models of pressure switches 100 cannot be tested. Therefore, a movable terminal block 2022 is used, with a predetermined size range corresponding to the terminal block spacing 1011 of the terminal block 101. This allows the movable terminal block to meet the testing requirements of pressure switches 100 with different terminal block spacings. Therefore, the predetermined size range is set between 12-20mm, which is based on extensive research and analysis of mainstream pressure switch models currently on the market.

[0041] In specific application scenarios, select a suitable movable terminal block 2022 according to the spacing of the terminals 1011 of the pressure switch 100 to be tested, and install the pressure switch 100 on the test station to ensure that the movable terminal block can be adapted to the terminals 101 of the pressure switch 100.

[0042] Furthermore, the total height of the pressure switch 100 that the retractable probe 2021 can be adapted to is between 80-100mm. In this embodiment, since the total height of the pressure switch 100 may vary, the retractable probe 2021 can flexibly ensure that most types of pressure switches 100 can make full contact with the probe.

[0043] In the actual test process, the end of the telescopic probe 2021 is provided with a spring, so as to match the pressure switch 100 of different heights, so as to ensure that the end of the telescopic probe 2021 can be aligned with the air inlet 1021 of the copper pipe 102 of the pressure switch 100. Once the height of the telescopic probe 2021 is adjusted, the tester can gently push the telescopic probe 2021 into the air inlet 1021 of the copper pipe 102 to establish an electrical connection. In this process, it is necessary to ensure that the contact between the telescopic probe 2021 and the air inlet 1021 is sufficient to avoid test errors caused by poor contact. Finally, the test signal is sent by the test circuit 203 and the test equipment in parallel to perform the electrical safety test.

[0044] In a specific embodiment, the insulating support plate 201 is an epoxy plate. The epoxy plate has good dielectric properties, that is, it has good insulation performance and can effectively prevent current leakage. In a high humidity environment, the electrical performance of the epoxy plate remains stable and is not affected by humidity changes. At the same time, it can also resist the erosion of moisture and prevent the insulation performance from being reduced due to high humidity.

[0045] Further, as shown in Figure 4 and Figure 5 , the epoxy plate includes multiple pieces, and each epoxy plate is connected by a connecting piece. In this embodiment, in order to make the safety test device 200 more stable and durable, multiple epoxy plates are used and are fixed together by connecting pieces to form a whole structure, which helps to ensure the stability and durability of the structure. As can be seen from Figure 5 , the epoxy plate is divided into two upper and lower pieces, and the two pieces of epoxy plate are connected by a connecting piece.

[0046] In actual application, the connecting piece can be a fastener such as a bolt and a nut to ensure the firm connection between the epoxy plates. Considering the need for quick installation and disassembly, the connecting piece can also use buckles, latches and the like to connect and fix the epoxy plates, which not only greatly improves the assembly efficiency of the test station, but also ensures the tight connection between the epoxy plates and avoids the situation of loosening or falling off during the test.

[0047] In specific operation, the tester can select appropriate connecting pieces according to actual needs. For cases that need to bear large loads or vibrations, bolts and nuts can be selected for connection; while for cases that need to be frequently disassembled or adjusted, buckles and latches and the like connecting pieces can be selected. This flexible selection method not only improves the adaptability of the test platform, but also provides more convenience for the tester.

[0048] In a specific embodiment, the test station includes at least 10. In this embodiment, in order to be able to simultaneously test a plurality of pressure switches 100, at least 10 test stations are provided, and in actual application scenarios, more test stations can be provided according to requirements to further shorten the test period. The test stations are arranged in a regular layout on the insulating support plate 201, ensuring that each test station can be easily connected to the parallel test circuit 203, and there is enough space for operation and observation.

[0049] It should be noted that the arrangement of the test station should also consider safety to ensure that dangerous situations such as short circuits and electrical leakage do not occur during testing. At the same time, the test personnel also need to wear appropriate protective equipment, such as insulating gloves, to ensure personal safety.

[0050] Further, the mobile terminal 2022 includes a terminal body, a resilient member at one end of the terminal body, and a terminal interface at the other end of the resilient member. In this embodiment, the terminal body is usually made of insulating materials such as plastic or epoxy resin to ensure electrical safety. The terminal interface is the part of the mobile terminal 2022 that connects to external wires or terminals 101, and is usually designed in a style that is easy to plug and unplug, such as a pin, a socket, or a threaded connection, to accommodate different connection needs. The terminal interface is usually made of metal materials with good electrical conductivity, such as copper or tinned copper, to ensure good electrical connection.

[0051] Further, the main function of the resilient member (such as a spring or an elastic plastic sheet) is to provide elastic adaptability, allowing the mobile terminal 2022 to automatically adjust according to the spacing of the terminal posts 1011 of different pressure switches 100, ensuring that the terminal can make close contact with terminal posts 1011 of pressure switches 100 of various sizes and shapes, thereby establishing a reliable electrical connection.

[0052] Specifically, the resilient member also plays a role in maintaining contact pressure during wiring. When the terminal 101 is connected to the terminal interface, if the spacing of the terminal posts 1011 of the terminal 101 is greater than the width of the terminal body, the resilient member will provide a certain pressure, causing the terminal posts 1011 to press the resilient member downward, while the resilient member provides a counteracting force to the terminal posts 1011, ensuring that the electrical connection between the two is tight and stable. Buffering and shock absorption: the resilient member also plays a role in buffering and shock absorption during the connection and disconnection of the terminal posts 1011, protecting the terminal interface and the terminal posts 1011 of the pressure switch 100 from damage.

[0053] It should be noted that in addition to adapting different sizes of pressure switches 100 through the elastic effect of the elastic member, the position of the terminal block interface can also be adjusted for adaptation. Specifically, in order to facilitate the user to adjust the position of the terminal block interface, the movable terminal block 2022 can be provided with an adjustment mechanism, which can be a knob, a slide rail or a buckle, etc. The tester can change the position and angle of the terminal block interface by operating these mechanisms, so as to adapt to pressure switches 100 of different sizes or specifications. In order to facilitate the tester to identify and adjust the position of the terminal block interface, the terminal block body can be marked with scale lines, indicating arrows or digital markings, etc. These markings can help the tester quickly find the correct adjustment position and ensure the accurate alignment between the terminal block interface and the terminal post 1011 of the pressure switch 100.

[0054] Further, the terminal block body is provided with an inlet, the terminal block interface is provided with two and is spaced apart in the inlet, and the elastic member is provided with two and is respectively arranged on the back of the two terminal block interfaces. In this embodiment, each terminal block interface is designed with a contact point or a pin matched with the terminal post 1011 to ensure the reliability of electrical connection. Since the terminal block interface is provided with two and is spaced apart, under the action of the elastic member, the two terminal block interfaces can move and adjust within a certain range in the inlet. When the terminal block interface is in contact with the terminal post 1011 of the pressure switch 100 of different sizes, the elastic member will automatically adjust according to the spacing of the terminal post 1011, ensuring that the terminal block interface can be in close contact with the terminal post 1011 and establish a good electrical connection

[0055] In summary, the safety test process of the pressure switch 100 includes: setting 10 test stations on the insulating support plate 201, and installing a test interface assembly 202 on each test station to ensure that the test interface assembly 202 on each test station can be correctly connected with the pressure switch 100 to be tested. First, place the pressure switch 100 to be tested on the corresponding test station, connect the telescopic probe 2021 with the copper pipe 102 inlet 1021 of the pressure switch 100, and ensure that the connection is tight. Connect the mobile terminal block 2022 with the terminal 101 of the pressure switch 100, and ensure that the connection is correct and stable. Then, set the test parameters on the test equipment, such as test voltage, test time, etc. Ensure that the first interface and the second interface of the test equipment have been correctly connected to the first access point 20311 and the second access point 20312 of the parallel test circuit 203, and prepare for the next test. Then, according to the requirements of GB 14536.1, apply a sinusoidal alternating voltage of 1500V (frequency of 50Hz or 60Hz) between the terminal 101 of the pressure switch 100 and the metal part of the shell, set the leakage current setting value to 1mA, and the duration is 1 minute (or alternatively, apply a voltage of 1800V for 1 second), to test the electrical safety and insulation performance of the pressure switch 100 in a high voltage environment. Finally, start the test equipment to test and start sending test signals. The test signals are transmitted to the pressure switch 100 on each test station through the parallel test circuit 203, the test equipment receives the test results from the parallel test circuit 203, and processes and analyzes them. The test equipment displays the test results through the display module, including whether the test is passed, the test time, the test voltage, etc.

[0056] The various embodiments described in the specification are progressive in nature, and each embodiment focuses on the differences from other embodiments. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts are described in the method part. It should be noted that for ordinary technical personnel in the technical field, without departing from the principle of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0057] It should also be noted that in this specification, relationship terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive.

[0058] Comprise, when used that a process, method, article or apparatus comprises several elements or steps does not, unless specifically stated to the contrary, preclude the presence of additional elements or steps.

Claims

1. A safety testing device for electrically safety testing a pressure switch, the pressure switch comprising a terminal and a copper tube, one end of the terminal being connected to one end of the copper tube, the other end of the copper tube being provided with an air inlet, characterized in that, The safety testing device comprises: an insulating support plate provided with a plurality of test stations for placing the pressure switch; a test interface assembly installed on the test station, the test interface assembly comprising a retractable probe and a movable terminal block connected with the retractable probe, the retractable probe being connected with the air inlet, the movable terminal block being connected with the other end of the terminal and being adaptable to the terminal of a predetermined size range; a parallel test circuit comprising two access points, the two access points being connected with a plurality of test stations simultaneously.

2. The safety testing device of claim 1, wherein, The two access points comprise a first access point and a second access point, the first access point being connected with a plurality of retractable probes on the test stations in parallel, the second access point being connected with a plurality of movable terminal blocks on the test stations in parallel.

3. The safety testing device of claim 2, wherein, Further comprising a test device, the test device comprising a first interface and a second interface connected with the parallel test circuit, the first interface and the second interface being connected with the first access point and the second access point respectively.

4. The safety testing device of claim 1, wherein, The predetermined size range is the terminal post spacing range of the terminal, and the predetermined size range is 12-20mm.

5. The safety testing device of claim 1, wherein, The total height of the pressure switch adaptable to the retractable probe is 80-100mm.

6. The safety testing device of claim 1, wherein, The insulating support plate is an epoxy plate.

7. The safety testing device of claim 6, wherein, The epoxy plate comprises a plurality of plates, and the plates are connected through a connecting piece.

8. The safety testing device of claim 1, wherein, The test station comprises at least 10.

9. The safety testing device of claim 1, wherein, The movable terminal block comprises a terminal block body, an elastic piece abutting on one end of the terminal block body, and a terminal block interface abutting on the other end of the elastic piece.

10. The safety testing device of claim 9, wherein, The terminal block body is provided with an access port, the terminal block interface is provided with two and is spaced apart in the access port, and the elastic piece is provided with two and is respectively arranged on the back of the two terminal block interfaces.

Images