Explosion-proof electric leakage test device

Abstract

The utility model provides an explosion-proof electric leakage test device. The explosion-proof electric leakage test device comprises a junction box, an input assembly and at least two output assemblies, the input assembly comprises an input electric connector, a sensor input terminal and an input resistor; the output assembly comprises an output electric connector, a sensor output terminal and an output resistor; the sensor output terminals of the at least two output assemblies are respectively connected with the sensor input terminals through circuits, and the at least two output assemblies are arranged in parallel; wherein the input electric connector is connected with an external circuit, and the output electric connector is connected with the external circuit or a ground wire; current in an external circuit passes through the input electric connector, the sensor input terminal, the input resistor, the output resistor, the sensor output terminal and the output electric connector and then flows to other external circuits or ground wires so as to carry out an electric leakage test. According to the utility model, by integrating resistors with different resistance values and setting a flexible circuit access mode, the efficiency and the safety of a leakage test are significantly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage test equipment, in particular to a flameproof leakage test device. Background Art

[0002] At present, in order to ensure the normal operation of the underground power supply system, it is necessary to regularly check whether the leakage relay is working properly. Therefore, coal mine safety regulations usually require relevant staff to conduct leakage tests on various electrical switches underground every month.

[0003] Due to the lack of leakage test equipment specifically for mines in the existing technology, the method usually adopted for leakage testing in coal mines is to turn on the switch, use a test resistor to bridge between any live wire and the ground wire, and then turn on the power to see whether the upper-level feeder switch (i.e., the electric switch) trips due to leakage protection; however, the above leakage test method will generate a lot of electric sparks during the leakage test, which may cause harm to personnel or cause underground explosions, and the safety of the test cannot be guaranteed; moreover, the above leakage test method is inconvenient to operate, and it is easy to cause other circuit faults (for example: short circuit) due to the test, which will cause unnecessary losses and seriously reduce the efficiency of coal mine safety production. Utility Model Content

[0004] The utility model provides a flameproof leakage test device to solve the problems of poor safety, inconvenient operation and easy occurrence of other circuit faults in the leakage test method in the prior art.

[0005] In order to solve the above problems, the utility model provides a flameproof leakage test device, comprising: a junction box, an input component and at least two output components; the input component comprises an input electrical connector, a sensor input terminal and an input resistor; the output component comprises an output electrical connector, a sensor output terminal and an output resistor; an insulating cavity is provided inside the junction box, and the inner wall of the insulating cavity is made of insulating material; one end of the input electrical connector extends outside the insulating cavity, and the other end is located inside the insulating cavity, and is connected to the sensor input terminal through a circuit; the input resistor is detachably arranged on the sensor input terminal, and is connected in series to the circuit between the input electrical connector and the sensor input terminal; one end of the output electrical connector extends outside the insulating cavity, and the other end is located inside the insulating cavity, and is connected to the sensor output terminal through a circuit. Connected through a circuit; the output resistor is detachably arranged on the sensor output terminal and is connected in series to the circuit between the output electrical connector and the sensor output terminal; the sensor output terminals of at least two output components are respectively connected to the sensor input terminals through a circuit, and at least two output components are arranged in parallel; the resistance values ​​of the output resistors of different output components are different; wherein, the input electrical connector is connected to the external circuit, and the output electrical connector is connected to the external circuit or the ground wire; the output component connected to the sensor input terminal is selected according to the voltage size of the external circuit; the current in the external circuit flows through the input electrical connector, the sensor input terminal, the input resistor, the output resistor, the sensor output terminal and the output electrical connector to other external circuits or the ground wire to perform a leakage test.

[0006] Furthermore, there are at least three output components, including a first component, a second component and a third component, the resistance value and power of the output resistor in the first component are both smaller than the resistance value of the output resistor in the second component, and the resistance value and power of the output resistor in the second component are both smaller than the resistance value of the output resistor in the third component; wherein, when the external circuit is a first voltage, the first component is connected to the input component; when the external circuit is a second voltage, the second component is connected to the input component; when the external circuit is a third voltage, the third component is connected to the input component; the first voltage is smaller than the second voltage, and the second voltage is smaller than the third voltage.

[0007] Furthermore, the resistance value of the input resistor of the first component is 2000 ohms, the power is 10 watts, and the first voltage is 380 volts or 220 volts.

[0008] Furthermore, the resistance value of the input resistor of the second component is 11,000 ohms, the power is 10 watts, and the second voltage is 660 volts.

[0009] Furthermore, the resistance value of the input resistor of the third component is 20,000 ohms, the power is 10 watts, and the third voltage is 1140 volts.

[0010] Furthermore, the input component also includes a first buffer spring, the input electrical connector can be slidably inserted into the junction box, the first buffer spring is sleeved on one end of the input electrical connector located in the insulating cavity, and the two ends respectively abut against the input electrical connector and the inner wall of the insulating cavity, and the first buffer spring is used to constrain and buffer the axial movement of the input electrical connector; and / or, the output component also includes a second buffer spring, the output electrical connector can be slidably inserted into the junction box, the second buffer spring is sleeved on one end of the output electrical connector located in the insulating cavity, and the two ends respectively abut against the output electrical connector and the inner wall of the insulating cavity, and the second buffer spring is used to constrain and buffer the axial movement of the output electrical connector.

[0011] Furthermore, the sensor input terminal and the sensor output terminal have the same structure, both including an electrical platform, a shielding device and a detection sensor respectively arranged on the electrical platform; the electrical platform has five interfaces, namely two sensor excitation interfaces, two sensor signal interfaces and a shielding interface; the shielding interface is used to connect to the shielding device, and the shielding device is used to shield the interference of external interference signals on the signal of the detection sensor; the two sensor excitation interfaces are respectively connected to the detection sensors, and are used to transmit the current and / or voltage change signals of the external circuit to the detection sensors; the two sensor signal interfaces are respectively connected to the detection sensors, and are used to transmit the current and / or voltage change data detected by the detection sensors to the external device; wherein, the five interfaces of the electrical platform in the sensor input terminal are respectively connected to the input electrical connector through circuits; the five interfaces of the electrical platform in the sensor output terminal are respectively connected to the output electrical connector through circuits.

[0012] Furthermore, the sensor input terminal and / or the sensor output terminal also includes a gain potentiometer, which is arranged on the electrical platform and connected to the detection sensor for gaining the electrical signal received and / or sent by the detection sensor.

[0013] Furthermore, the flameproof leakage test device also includes a wiring cover, which is detachably arranged on the junction box and is used to seal the insulating cavity, and the wiring cover is made of insulating material; the flameproof leakage test device also includes a sealing ring, which is arranged between the junction box and the wiring cover, and is respectively sealed with the junction box and the wiring cover to seal the insulating cavity.

[0014] Furthermore, the outer wall of the junction box is made of corrosion-resistant material; the inner wall of the insulating cavity is made of polycarbonate material; the flameproof leakage test device also includes an overload protector, which is arranged in the insulating cavity and is connected to the input component and the output component through the circuit respectively. The overload protector is used to cut off power when the input component or the output component is overloaded.

[0015] Applying the technical solution of the utility model, the utility model provides a flameproof leakage test device, comprising: a junction box, an input component and at least two output components; the input component comprises an input electrical connector, a sensor input terminal and an input resistor; the output component comprises an output electrical connector, a sensor output terminal and an output resistor; an insulating cavity is provided inside the junction box, and the inner wall of the insulating cavity is made of insulating material; one end of the input electrical connector extends outside the insulating cavity, and the other end is located inside the insulating cavity, and is connected to the sensor input terminal through a circuit; the input resistor is detachably arranged on the sensor input terminal, and is connected in series to the circuit between the input electrical connector and the sensor input terminal; one end of the output electrical connector extends outside the insulating cavity, and the other end is located inside the insulating cavity, and is connected to the sensor output terminal through a circuit. The terminals are connected through a circuit; the output resistor is detachably arranged on the sensor output terminal and is connected in series to the circuit between the output electrical connector and the sensor output terminal; the sensor output terminals of at least two output components are respectively connected to the sensor input terminals through a circuit, and at least two output components are arranged in parallel; the resistance values ​​of the output resistors of different output components are different; wherein, the input electrical connector is connected to the external circuit, and the output electrical connector is connected to the external circuit or the ground wire; the output component connected to the sensor input terminal is selected according to the voltage size of the external circuit; the current in the external circuit flows through the input electrical connector, the sensor input terminal, the input resistor, the output resistor, the sensor output terminal and the output electrical connector to other external circuits or the ground wire to perform a leakage test.

[0016] The utility model sets a junction box, an input component and at least two output components to work together, so that the explosion-proof leakage test device can flexibly select the input resistor and the output component connected to the sensor input terminal according to the voltage of the external circuit to be detected, thereby realizing the rapid switching of the resistance in the detection circuit and the circuit; by setting the input resistor to be detachable on the sensor input terminal and the output resistor to be detachable on the sensor output terminal, it is convenient to quickly replace the resistor later; by setting the junction box and using insulating material for the inner wall of the insulating cavity, the safety of the leakage test is guaranteed; the utility model significantly improves the efficiency and safety of the leakage test by integrating resistors of different resistance values ​​and setting flexible circuit access methods, and can be effectively applied to the testing of leakage protection devices of various voltage levels. There is no need to frequently replace resistors during testing, which reduces maintenance costs and also It meets the use requirements of special environments such as underground coal mines, ensures the stability and reliability of the equipment, and enables it to maintain good performance in harsh environments; in actual use, the internal resistance of the utility model is quickly adjusted by switching the circuit connectivity relationship, and leakage tests can be performed on 127V, 220V, 380V, 660V and 1140V electrical switches in coal mines. At the same time, by setting up a junction box, it is possible to detect whether the relay protection of the electrical switch is sensitive and reliable while ensuring safety, thereby avoiding the generation of electric sparks during the leakage test, thereby effectively protecting the safety of the staff, and avoiding causing other circuit faults, thereby ensuring safe and stable production in coal mines; the utility model has a simple structure and low cost, is easy to assemble and subsequently maintain, is small in size and easy to carry, and can be operated by one staff member to perform the leakage test, and is suitable for large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A partial structural diagram of a flameproof leakage test device provided by an embodiment of the present utility model is shown;

[0019] Figure 2 The figure shows the external structure of the wiring cover provided by the embodiment of the present utility model.

[0020] The above drawings include the following reference numerals:

[0021] 10. Junction box; 11. Insulation cavity;

[0022] 20. Input assembly; 21. Input electrical connector; 22. Sensor input terminal; 23. Input resistor;

[0023] 30. Output assembly; 31. Output electrical connector; 32. Sensor output terminal; 33. Output resistor; 34. Second buffer spring;

[0024] 40. Electrical platform; 41. Sensor excitation interface; 42. Sensor signal interface; 43. Shielding interface;

[0025] 50. Wiring cover. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] like Figures 1 to 2As shown, an embodiment of the present invention provides a flameproof leakage test device, comprising: a junction box 10, an input component 20 and at least two output components 30; the input component 20 comprises an input electrical connector 21, a sensor input terminal 22 and an input resistor 23; the output component 30 comprises an output electrical connector 31, a sensor output terminal 32 and an output resistor 33; the junction box 10 has an insulating cavity 11 inside, and the inner wall of the insulating cavity 11 is made of insulating material; one end of the input electrical connector 21 extends outside the insulating cavity 11, and the other end is located in the insulating cavity 11, and is connected to the sensor input terminal 22 through a circuit; the input resistor 23 is detachably arranged on the sensor input terminal 22, and is connected in series to the circuit between the input electrical connector 21 and the sensor input terminal 22; one end of the output electrical connector 31 extends outside the insulating cavity 11, and the other end is located in the insulating cavity 11, and is connected to the sensor output terminal 22 through a circuit. The output terminal 32 is connected through a circuit; the output resistor 33 is detachably arranged on the sensor output terminal 32 and is connected in series to the circuit between the output electrical connector 31 and the sensor output terminal 32; the sensor output terminals 32 of at least two output components 30 are respectively connected to the sensor input terminal 22 through a circuit, and at least two output components 30 are arranged in parallel; the resistance values ​​of the output resistors 33 of different output components 30 are different; wherein, the input electrical connector 21 is connected to the external circuit, and the output electrical connector 31 is connected to the external circuit or the ground wire; the output component 30 connected to the sensor input terminal 22 is selected according to the voltage size of the external circuit; the current in the external circuit flows through the input electrical connector 21, the sensor input terminal 22, the input resistor 23, the output resistor 33, the sensor output terminal 32 and the output electrical connector 31 to other external circuits or the ground wire for leakage testing.

[0028] The present invention sets a junction box 10, an input component 20 and at least two output components 30 to work together, so that the explosion-proof leakage test device can flexibly select the input resistor 23 and the output component 30 connected to the sensor input terminal 22 according to the voltage of the external circuit to be detected, thereby realizing the rapid switching of the resistance in the detection circuit and the circuit; by setting the input resistor 23 to be detachably arranged on the sensor input terminal 22 and the output resistor 33 to be detachably arranged on the sensor output terminal 32, it is convenient to quickly replace the resistor later; by setting the junction box 10 and the inner wall of the insulating cavity 11 using insulating material, the safety of the leakage test is guaranteed; the present invention significantly improves the efficiency and safety of the leakage test by integrating resistors of different resistance values ​​and setting flexible circuit access methods, and can be efficiently applied to the testing of leakage protection devices of various voltage levels, without the need to frequently replace resistors during the test. It reduces maintenance costs and also meets the use requirements of special environments such as underground coal mines, ensures the stability and reliability of the equipment, and enables it to maintain good performance in harsh environments; in actual use, the internal resistance of the utility model is quickly adjusted by switching the circuit connectivity relationship, and leakage tests can be performed on electrical switches such as 127V, 220V, 380V, 660V and 1140V in coal mines. At the same time, by setting up the junction box 10, it is possible to detect whether the relay protection of the electrical switch is sensitive and reliable while ensuring safety, thereby avoiding the generation of electric sparks during the leakage test, thereby effectively protecting the safety of the staff, and avoiding causing other circuit faults, thereby ensuring safe and stable production in coal mines; the utility model has a simple structure and low cost, is easy to assemble and subsequently maintain, is small in size and easy to carry, and can be operated by one staff member to perform the leakage test, and is suitable for large-scale promotion and use.

[0029] like Figure 1 As shown, there are at least three output components 30, including a first component, a second component and a third component. The resistance value and power of the output resistor 33 in the first component are both smaller than the resistance value of the output resistor 33 in the second component, and the resistance value and power of the output resistor 33 in the second component are both smaller than the resistance value of the output resistor 33 in the third component. When the external circuit is a first voltage, the first component is connected to the input component 20; when the external circuit is a second voltage, the second component is connected to the input component 20; when the external circuit is a third voltage, the third component is connected to the input component 20. The first voltage is smaller than the second voltage, and the second voltage is smaller than the third voltage.

[0030] This arrangement allows the first component, the second component and the third component to be selected respectively corresponding to voltages of different sizes, further improving the testing efficiency of the staff for different external circuits.

[0031] Specifically, the resistance value of the input resistor 23 of the first component is 2000 ohms, the power is 10 watts, and the first voltage is 380 volts or 220 volts.

[0032] By setting a 2000 ohm 10 watt input resistor 23 to test the performance of the leakage protection device at a voltage level of 380 volts or 220 volts, it effectively adapts to the common standard voltages in commercial, residential and industrial parks, thereby ensuring accurate testing of the accuracy and response speed of the leakage protection device in daily environments, effectively protecting the safety of people and property.

[0033] Specifically, the resistance value of the input resistor 23 of the second component is 11,000 ohms, the power is 10 watts, and the second voltage is 660 volts.

[0034] This arrangement enables the flameproof leakage test device to effectively detect the voltage level commonly used in coal mines (i.e., 660V voltage level), and then quickly and accurately detect whether the leakage protection device at this voltage level is working properly, effectively preventing electrical fires and electric shock accidents.

[0035] Specifically, the resistance value of the input resistor 23 of the third component is 20,000 ohms, the power is 10 watts, and the third voltage is 1140 volts.

[0036] This setting enables the flameproof leakage test device to test the performance of leakage protection devices with a voltage level of 1140V. The 1140V voltage level is commonly found in large industrial equipment under mines. It can ensure accurate testing of the accuracy and response speed of leakage protection devices in high-voltage environments, effectively protecting the electrical safety of large industrial equipment in industrial production.

[0037] like Figure 1 As shown, the input component 20 also includes a first buffer spring, the input electrical connector 21 is slidably provided on the junction box 10, the first buffer spring is sleeved on one end of the input electrical connector 21 located in the insulating cavity 11, and the two ends are respectively abutted against the input electrical connector 21 and the inner wall of the insulating cavity 11, and the first buffer spring is used to constrain and buffer the axial movement of the input electrical connector 21; and / or, the output component 30 also includes a second buffer spring 34, the output electrical connector 31 is slidably provided on the junction box 10, the second buffer spring 34 is sleeved on one end of the output electrical connector 31 located in the insulating cavity 11, and the two ends are respectively abutted against the output electrical connector 31 and the inner wall of the insulating cavity 11, and the second buffer spring 34 is used to constrain and buffer the axial movement of the output electrical connector 31.

[0038] By providing the first and second buffer springs 34 , the axial movement of the input electrical connector 21 and the output electrical connector 31 is effectively constrained and buffered, thereby ensuring reliable connection between the input electrical connector 21 and the output electrical connector 31 and the external circuit.

[0039] like Figure 1 As shown, the sensor input terminal 22 and the sensor output terminal 32 have the same structure, both including an electrical platform 40, a shielding device and a detection sensor respectively arranged on the electrical platform 40; the electrical platform 40 has five interfaces, namely two sensor excitation interfaces 41, two sensor signal interfaces 42 and a shielding interface 43; the shielding interface 43 is used to connect to the shielding device, and the shielding device is used to shield the interference of external interference signals on the signal of the detection sensor; the two sensor excitation interfaces 41 are respectively connected to the detection sensors for transmitting the current and / or voltage change signals of the external circuit to the detection sensors; the two sensor signal interfaces 42 are respectively connected to the detection sensors for transmitting the current and / or voltage change data detected by the detection sensors to the external device; wherein, the five interfaces of the electrical platform 40 in the sensor input terminal 22 are respectively connected to the input electrical connector 21 through a circuit; the five interfaces of the electrical platform 40 in the sensor output terminal 32 are respectively connected to the output electrical connector 31 through a circuit.

[0040] By arranging the electrical platform 40 with two sensor excitation interfaces 41 , two sensor signal interfaces 42 and a shielding interface 43 , both the reliable operation of the shielding device and the detection accuracy of the detection sensor are guaranteed.

[0041] In a specific embodiment of the present invention, a resistor access socket is provided on the electrical platform 40. The resistor access socket is made of copper alloy material and is used for detachable connection with the resistor. The resistor access socket made of copper alloy material has good conductivity and corrosion resistance, which can ensure stable contact between the resistor and the resistor access socket, and can also maintain good electrical performance in harsh environments.

[0042] Optionally, the sensor input terminal 22 and / or the sensor output terminal 32 further include a gain potentiometer, which is disposed on the electrical platform 40 and connected to the detection sensor for gaining the electrical signal received and / or sent by the detection sensor.

[0043] By setting the gain potentiometer, the electrical signal received and / or sent by the detection sensor is effectively gained, thereby ensuring the accuracy of the detection result and the authenticity and reliability of the transmitted signal.

[0044] It should be noted that in a specific embodiment of the present invention, the gain potentiometer refers to an existing common electronic component, whose working principle is similar to that of an ordinary potentiometer, and is mainly used to adjust the gain of the signal. The following is a detailed description of the working principle of the gain potentiometer: The gain potentiometer is usually composed of a variable resistor and a fixed resistor. The two fixed ends of the variable resistor are respectively connected to the input and output ends, while the fixed resistor is connected between the input end and the ground. By rotating the knob of the potentiometer, the resistance value of the variable resistor can be changed, thereby changing the gain between the input signal and the output signal; when the input signal passes through the potentiometer, part of the signal will be absorbed by the fixed resistor, while the other part of the signal will pass through the variable resistor. Since the resistance value of the variable resistor can be changed, the strength of the output signal will also change accordingly. This process of changing the output signal strength is the process of gain adjustment.

[0045] In addition, the gain potentiometer can have many uses in the electronic circuit of the utility model, such as: 1. As an audio amplifier: In an audio amplifier, the gain potentiometer can be used to adjust the gain of the input signal, thereby controlling the volume of the output signal (for example, working in conjunction with an alarm to issue a voice alarm when a leakage is detected); 2. Sensor signal adjustment: In a sensor circuit, the gain potentiometer can be used to adjust the gain of the sensor signal to adapt to different measurement ranges and accuracy requirements; 3. Signal filter: The gain potentiometer can be used in a signal filter to change the cutoff frequency of the filter by adjusting the gain, thereby filtering a specific frequency signal; 4. Feedback control system: In a feedback control system, the gain potentiometer can be used to adjust the gain of the system to optimize the system stability and response speed.

[0046] like Figure 2 As shown, the flameproof leakage test device also includes a wiring cover 50, which is detachably arranged on the junction box 10 and is used to seal the insulating cavity 11. The wiring cover 50 is made of insulating material. The flameproof leakage test device also includes a sealing ring, which is arranged between the junction box 10 and the wiring cover 50 and is sealed with the junction box 10 and the wiring cover 50 respectively to seal the insulating cavity 11.

[0047] By setting up the wiring cover 50 using insulating material, the insulating cavity 11 is further sealed; by setting up a sealing ring, the explosive gas in the coal mine can be prevented from entering the interior of the insulating cavity 11, and the internal circuit can also be protected from external factors such as moisture and dust, thereby enhancing the explosion-proof performance and protection capability of the device.

[0048] In a specific embodiment of the present invention, Figure 1 and Figure 2As shown, fixing blocks are provided at corresponding positions on the sides of the junction box 10 and the junction cover 50 , and bolts are respectively passed through the two corresponding fixing blocks to realize a detachable fixed connection between the junction box 10 and the junction cover 50 .

[0049] Specifically, the outer wall of the junction box 10 is made of corrosion-resistant material; the inner wall of the insulating cavity 11 is made of polycarbonate material; the flameproof leakage test device also includes an overload protector, which is arranged in the insulating cavity 11 and is connected to the input component 20 and the output component 30 through the circuit respectively. The overload protector is used to cut off power when the input component 20 or the output component 30 is overloaded.

[0050] By setting the outer wall of the junction box 10 to be made of corrosion-resistant material, it can effectively resist the erosion of corrosive substances such as acids, alkalis, and salt spray in environments such as underground coal mines, ensuring the normal operation of the device in harsh environments; by setting the inner wall of the insulating cavity 11 to be made of polycarbonate material, the excellent electrical insulation performance and heat resistance of polycarbonate are effectively utilized, which can effectively prevent internal circuit short circuits and overheating, and extend the service life of the device; by setting an overload protector, it can prevent equipment damage due to excessive current during the test process, protect the safety of the device and the electrical switch under test, and reduce maintenance costs.

[0051] The specific working process and principle of an embodiment of the present invention are now described in detail as follows:

[0052] During use, first connect the input electrical connector 21 of the input assembly 20 to the positive pole of the electrical switch to be tested, and select the output assembly 30 connected to the input assembly 20 according to the voltage level of the electrical switch, and connect the input electrical connector 21 in the output assembly 30 to the negative pole of the electrical switch, so that the electrical switch can be subjected to a leakage test. The operation can be performed by one person, which is relatively convenient. The output resistances of the three output assemblies 30 are 2000 ohms / 10 watts, 11000 ohms / 10 watts, and 20000 ohms / 10 watts, respectively, which can respectively perform leakage tests on electrical switches with underground voltage levels of 127V, 660V, and 1140V, and ensure that the explosion-proof level meets the standard, thereby avoiding accidents such as personal injury and explosion failure.

[0053] In summary, the present invention provides a flameproof leakage test device. The present invention sets a junction box 10, an input component 20 and at least two output components 30 to work together, so that the flameproof leakage test device can flexibly select the input resistor 23 and the output component 30 connected to the sensor input terminal 22 according to the voltage of the external circuit to be detected, thereby realizing the rapid switching of the resistance in the detection circuit and the circuit; by setting the input resistor 23 to be detachably set on the sensor input terminal 22 and the output resistor 33 to be detachably set on the sensor output terminal 32, it is convenient to quickly replace the resistor later; by setting the junction box 10 and the inner wall of the insulating cavity 11 using insulating material, the safety of the leakage test is guaranteed; the present invention significantly improves the efficiency and safety of the leakage test by integrating resistors of different resistance values ​​and setting flexible circuit access methods, and can be efficiently applied to the testing of leakage protection devices of various voltage levels. There is no need to frequently replace resistors during the test, which reduces maintenance costs. It also meets the use requirements of special environments such as underground coal mines, ensures the stability and reliability of the equipment, and enables it to maintain good performance in harsh environments. In actual use, the internal resistor of the utility model is quickly adjusted by switching the circuit connectivity relationship, and leakage tests can be performed on electrical switches such as 127V, 220V, 380V, 660V and 1140V in coal mines. At the same time, by providing a junction box 10, it is possible to detect whether the relay protection of the electrical switch is sensitive and reliable while ensuring safety, avoiding the generation of electric sparks during the leakage test, thereby effectively protecting the safety of the staff, and avoiding causing other circuit faults, thereby ensuring safe and stable production in coal mines. The utility model has a simple structure and low cost, is easy to assemble and subsequently maintain, is small in size and easy to carry, and can be operated by one staff member to perform the leakage test, making it suitable for large-scale promotion and use.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0055] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0056] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A flameproof leakage test device, characterized in that: include: A junction box (10), an input component (20) and at least two output components (30); the input component (20) includes an input electrical connector (21), a sensor input terminal (22) and an input resistor (23); the output component (30) includes an output electrical connector (31), a sensor output terminal (32) and an output resistor (33); the junction box (10) has an insulating cavity (11) inside, and the inner wall of the insulating cavity (11) is made of insulating material; one end of the input electrical connector (21) extends out of the insulating cavity (11) 1) outside, and the other end is located in the insulating cavity (11) and is connected to the sensor input terminal (22) through a circuit; the input resistor (23) is detachably arranged on the sensor input terminal (22) and is connected in series to the circuit between the input electrical connector (21) and the sensor input terminal (22); one end of the output electrical connector (31) extends outside the insulating cavity (11), and the other end is located in the insulating cavity (11) and is connected to the sensor output terminal (32) through a circuit; the The output resistor (33) is detachably arranged on the sensor output terminal (32) and connected in series to the circuit between the output electrical connector (31) and the sensor output terminal (32); the sensor output terminals (32) of at least two output components (30) are respectively connected to the sensor input terminal (22) through a circuit, and at least two output components (30) are arranged in parallel; the resistance values ​​of the output resistors (33) of different output components (30) are different; wherein the input electrical connector (21) is connected to an external circuit, and the output electrical connector (31) is connected to an external circuit or a ground wire; the output component (30) connected to the sensor input terminal (22) is selected according to the voltage of the external circuit; the current in the external circuit flows through the input electrical connector (21), the sensor input terminal (22), the input resistor (23), the output resistor (33), the sensor output terminal (32) and the output electrical connector (31) and then flows to other external circuits or a ground wire to perform a leakage test.

2. The flameproof leakage test device according to claim 1, characterized in that: The output components (30) are at least three, including a first component, a second component, and a third component. The resistance value and power of the output resistor (33) in the first component are both smaller than the resistance value of the output resistor (33) in the second component, and the resistance value and power of the output resistor (33) in the second component are both smaller than the resistance value of the output resistor (33) in the third component. When the external circuit is at a first voltage, the first component is connected to the input component (20); when the external circuit is at a second voltage, the second component is connected to the input component (20); when the external circuit is at a third voltage, the third component is connected to the input component (20); the first voltage is smaller than the second voltage, and the second voltage is smaller than the third voltage.

3. The flameproof leakage test device according to claim 2, characterized in that: The resistance value of the input resistor (23) of the first component is 2000 ohms, the power is 10 watts, and the first voltage is 380 volts or 220 volts.

4. The flameproof leakage test device according to claim 2, characterized in that: The resistance value of the input resistor (23) of the second component is 11000 ohms, the power is 10 watts, and the second voltage is 660 volts.

5. The flameproof leakage test device according to claim 2, characterized in that: The resistance value of the input resistor (23) of the third component is 20,000 ohms, the power is 10 watts, and the third voltage is 1140 volts.

6. The flameproof leakage test device according to claim 1, characterized in that: The input assembly (20) further comprises a first buffer spring. The input electrical connector (21) is slidably disposed on the junction box (10). The first buffer spring is sleeved on one end of the input electrical connector (21) located in the insulating cavity (11), and both ends of the first buffer spring respectively abut against the input electrical connector (21) and the inner wall of the insulating cavity (11). The first buffer spring is used to constrain and buffer the movement of the input electrical connector (21) along its axial direction. And / or, the output assembly (30) further includes a second buffer spring (34), the output electrical connector (31) is slidably disposed on the junction box (10), the second buffer spring (34) is sleeved on one end of the output electrical connector (31) located in the insulating cavity (11), and both ends abut against the output electrical connector (31) and the inner wall of the insulating cavity (11), respectively, and the second buffer spring (34) is used to constrain and buffer the axial movement of the output electrical connector (31).

7. The flameproof leakage test device according to claim 1, characterized in that: The sensor input terminal (22) and the sensor output terminal (32) have the same structure, and both include an electrical platform (40), a shielding device and a detection sensor respectively arranged on the electrical platform (40); the electrical platform (40) has five interfaces, namely, two sensor excitation interfaces (41), two sensor signal interfaces (42) and a shielding interface (43); the shielding interface (43) is used to connect with the shielding device, and the shielding device is used to shield the interference of external interference signals on the signal of the detection sensor; the two sensor excitation interfaces (41) are respectively connected to the detection sensor The device is connected to a detection sensor for transmitting a current and / or voltage change signal of an external circuit to the detection sensor; two sensor signal interfaces (42) are respectively connected to the detection sensor for transmitting the current and / or voltage change data detected by the detection sensor to an external device; wherein the five interfaces of the electrical platform (40) in the sensor input terminal (22) are respectively connected to the input electrical connector (21) through a circuit; and the five interfaces of the electrical platform (40) in the sensor output terminal (32) are respectively connected to the output electrical connector (31) through a circuit.

8. The flameproof leakage test device according to claim 7, characterized in that: The sensor input terminal (22) and / or the sensor output terminal (32) further includes a gain potentiometer, which is arranged on the electrical platform (40) and connected to the detection sensor, and is used to gain the electrical signal received and / or sent by the detection sensor.

9. The flameproof leakage test device according to claim 1, characterized in that: The flameproof leakage test device further comprises a wiring cover (50), the wiring cover (50) being detachably arranged on the junction box (10) and used for sealing the insulating cavity (11), and the wiring cover (50) being made of insulating material; The flameproof leakage test device further comprises a sealing ring, which is arranged between the junction box (10) and the junction cover (50) and is respectively sealed with the junction box (10) and the junction cover (50) to seal the insulating cavity (11).

10. The flameproof leakage test device according to claim 1, characterized in that: The outer wall of the junction box (10) is made of corrosion-resistant material; the inner wall of the insulating cavity (11) is made of polycarbonate material; the flameproof leakage test device further comprises an overload protector, which is arranged in the insulating cavity (11) and is connected to the input component (20) and the output component (30) through a circuit, respectively. The overload protector is used to cut off power when the input component (20) or the output component (30) is overloaded.

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