Remote electric leakage test device for coal mine

Abstract

The utility model belongs to the technical field of coal mine power supply safety, and particularly relates to a coal mine remote electric leakage test device, which is characterized in that a resistor, a rectifying circuit, two groups of magnetic coils and a ground wire are connected through leads to form an electrical loop, one end of a first conducting rod is in intermittent contact with a neutral electrode and a test electrode, and the other end is in intermittent contact with an intermediate electrode; one end of the second conducting rod is in intermittent contact with the intermediate electrodes, and the first conducting rod and the second conducting rod are in indirect contact through the corresponding intermediate electrodes, so that a resistor of a corresponding voltage grade does not need to be manually selected during a remote electric leakage test, the test resistor is prevented from being wrongly connected, and wiring in a narrow wiring cavity is avoided; potential safety hazards caused by loosening of the clamp can be further avoided, and safety production is guaranteed to the maximum extent.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the coal mine power supply safety technical field, more particularly to a coal mine remote leakage test device. BACKGROUND

[0002] The Coal Mine Safety Regulations stipulate that leakage protection devices or selective leakage protection devices must be installed on the low-voltage feeder lines in the mine to ensure that the feeder lines are automatically cut off in the event of a leakage, and the operation of the low-voltage leakage protection devices must be tested for tripping once a day.

[0003] The Low-Voltage Leakage Protection Regulations stipulate that, with the assistance of a gas inspector, a remote manual leakage tripping test must be conducted on newly installed leakage protection devices before they are first put into operation. Leakage protection devices in operation must be tested for remote manual leakage tripping at least once a month. The test method is as follows: a test resistor is connected to the load side of the control switch at the farthest end according to different voltage levels (2KΩ resistor for 127V, 11KΩ resistor for 660V, and 20KΩ resistor for 1140V), one end of the test resistor is connected to the outlet of the electromagnetic starter, the other end is connected to the grounding bolt of the housing, the cover is closed, and the electromagnetic starter is powered on. The feeder switch is observed to determine whether it trips. If it trips, it indicates that the leakage protection device is reliable. After the test is completed, the test resistor is removed, and the electromagnetic starter is restored to its normal state. However, during the remote leakage test, the worker must manually select the resistor corresponding to the voltage level. If the worker makes a mistake and connects the test resistor incorrectly, it will pose a significant safety hazard during the remote leakage test.

[0004] In addition, wiring in a small wiring cavity may also result in loose connections. Currently, workers usually connect a clamp to both ends of the test resistor. During the test, the clamp is clamped onto the corresponding terminal post. However, the contact area between the clamp and the bolt is small. During the test, the clamp may swing at an angle, which may cause the clamp to be ejected from the terminal post. Once power is supplied, it will pose a significant safety hazard. SUMMARY

[0005] To address the above problems, the utility model aims to provide a coal mine remote leakage test device that can automatically select a resistor corresponding to the voltage level and prevent the clamp from loosening.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a coal mine remote electric leakage test device, including resistance, rectifier circuit, magnetic attraction coil, magnet, first conducting rod, second conducting rod, empty electrode, test electrode, intermediate electrode, ground electrode, slide bar, spring, ground wire, test resistance, shell, its characterized by: through the wire resistance, rectifier circuit, two groups of magnetic attraction coil, ground wire are connected and form the electric circuit, each component is fixed with the shell, one end of slide bar is perpendicular with the center position of magnetic attraction coil and is fixed, the other end is fixed with the shell, set up magnet and spring on the slide bar, the magnet can slide on the slide bar, one end of spring is fixed with the magnet, one end is fixed with the shell, the magnet is close to the magnetism of the side of magnetic attraction coil and the magnetism after the energization of magnetic attraction coil is the same sex, the first conducting rod and the second conducting rod are fixedly arranged on the two magnets, one end of the first conducting rod is intermittently contacted with the empty electrode and the test electrode, the other end is intermittently contacted with the intermediate electrode, one end of the second conducting rod is intermittently contacted with the intermediate electrode, and the other end is slidably contacted with the ground electrode, the test electrode is connected with one end of the corresponding test resistance through the wire, the other end of the test resistance is connected in parallel and is led out of the shell through the wire, the test electrode is from the direction of magnetic attraction coil to test resistance, and the corresponding test resistance is respectively 2KΩ resistance, 11KΩ resistance and 20KΩ resistance, the first conducting rod and the second conducting rod are indirectly contacted through the corresponding intermediate electrode.

[0007] Preferably, the shell and the slide bar are made of non-metallic material.

[0008] Preferably, the first conducting rod, the second conducting rod, the empty electrode, the test electrode, the intermediate electrode and the ground electrode are made of conductive material, and adjacent test electrodes and intermediate electrodes in the horizontal direction are not conductive to each other.

[0009] Preferably, the spring can push the first conducting rod and the second conducting rod to the leftmost side in the natural state.

[0010] Preferably, the two magnetic attraction coils, the two magnets and the two springs have the same or extremely similar performance indicators.

[0011] Preferably, anti-drop clamps are arranged at the wire inlet end of the resistance, the wire outlet end of the ground wire and the wire outlet end below the test resistance, respectively, the clamping head of the anti-drop clamp is connected with an arc-shaped clamp through a rotating shaft, the arc-shaped clamp can rotate 360 degrees around the rotating shaft, a sliding ring is sleeved on the rotating shaft, and the rotating shaft is connected with the wire outlet through the sliding ring.

[0012] Preferably, the handheld part of the anti-drop clamp is made of non-metallic material.

[0013] Preferably, the rotating shaft, the arc-shaped clamp and the sliding ring are made of conductive material.

[0014] Preferably, the corresponding anti-drop clamps are respectively clamped on the primary side terminal post, the secondary side terminal post and the shell ground electrode terminal post of the electromagnetic starter, after the cover is closed, the remote electric leakage test is carried out according to the existing process.

[0015] The utility model discloses beneficial effects are: when doing remote earth leakage test, need not manually select the resistance of corresponding voltage grade, avoid connecting test resistance wrongly, wiring in the narrow wiring cavity can further avoid the security risk of loose clamp, and the safe production is guaranteed to the maximum. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the internal structure diagram of the utility model;

[0017] Figure 2 It is the electrical schematic diagram of the utility model;

[0018] Figure 3 It is the test effect diagram of the utility model;

[0019] Figure 4 It is the fault state effect diagram of the utility model;

[0020] Figure 5 It is the anti-drop clamp structure diagram of the utility model;

[0021] Figure 6 It is the appearance schematic diagram of the utility model.

[0022] Among them: 1001-resistance, 1002-rectifier circuit, 1003-magnetic coil, 1004-magnet, 1005-first conducting rod, 1006-second conducting rod, 1007-empty electrode, 1008-test electrode, 1009-intermediate electrode, 1010-ground electrode, 1011-sliding rod, 1012-spring, 1013-ground wire, 2001-test resistance, 3001-housing, 4001-anti-drop clamp, 4002-chuck, 4003-rotation axis, 4004-arc clamp, 5001-outlet, 6001-primary side terminal post, 6002-secondary side terminal post, 6003-outer shell ground electrode terminal post DETAILED DESCRIPTION

[0023] In order to deepen the understanding of the utility model, the utility model will be further described in the following combining with examples, and this embodiment is only used for explaining the utility model, and does not constitute the limitation to the protection scope of the utility model.

[0024] Please refer to Figure 1 , Figure 2 , Figure 1 With Figure 2The utility model relates to a kind of coal mine remote leakage test device, including resistance 1001, rectifier circuit 1002, magnetic attraction coil 1003, magnet 1004, first conducting rod 1005, second conducting rod 1006, empty electrode 1007, test electrode 1008, intermediate electrode 1009, ground electrode 1010, slide bar 1011, spring 1012, ground wire 1013, test resistance 2001, shell 3001, and its characterized is: resistance 1001, rectifier circuit 1002, two groups of magnetic attraction coil 1003, ground wire 1013 are connected by wire and form electric circuit, each component is fixed with shell 3001, one end of slide bar 1011 is vertically fixed with the center position of magnetic attraction coil 1003, the other end is fixed with shell 3001, magnet 1004 and spring 1012 are set on slide bar 1011, magnet 1004 can slide on slide bar 1011, one end of spring 1012 is fixed with magnet 1004, one end is fixed with shell 3001, the magnetism of the side of magnet 1004 close to magnetic attraction coil 1003 is same with the magnetism generated after magnetic attraction coil 1003 energization, first conducting rod 1005 and second conducting rod 1006 are fixedly arranged on two magnets 1004, one end of first conducting rod 1005 is intermittently contacted with empty electrode 1007 and test electrode 1008, the other end is intermittently contacted with intermediate electrode 1009, one end of second conducting rod 1006 is intermittently contacted with intermediate electrode 1009, the other end is slidably contacted with ground electrode 1010;Test electrode 1008 is connected with one end of test resistance 2001 by wire respectively, the other end of test resistance 2001 is connected in parallel and then led out of shell by wire, the direction of test electrode 1008 from magnetic attraction coil 1003 to test resistance 2001 is corresponding, and the test resistance 2001 is respectively: 2KΩ resistance, 11KΩ resistance, 20KΩ resistance;First conducting rod 1005 and second conducting rod 1006 are indirectly contacted by corresponding intermediate electrode 1009.It needs to be explained that 2KΩ resistance, 11KΩ resistance, 20KΩ resistance are resistance corresponding with voltage level universally used in coal mine underground, and the test resistance 2001 of the product can be replaced to realize remote leakage test of other voltage level.Shell 3001 and slide bar 1011 are non-metallic materials, which can effectively prevent contact with primary and secondary side terminal posts of electromagnetic starter to cause electric shock accident.

[0025] First conducting rod 1005, second conducting rod 1006, empty electrode 1007, test electrode 1008, intermediate electrode 1009 and ground electrode 1010 are all conductive materials, and adjacent test electrode 1008 and intermediate electrode 1009 in horizontal direction are not conductive to each other, empty electrode 1007, test electrode 1008 and corresponding intermediate electrode 1009 in vertical direction can be conductive through first conducting rod 1005, and intermediate electrode 1009 and ground electrode 1010 can be conductive through second conducting rod 1006.

[0026] Please refer to Figures 1-4 , the product defaults to a fixed voltage level, after calibration, can make the first electric rod 1005, the second electric rod 1006 just fall on the corresponding test electrode 1008.

[0027] Please refer to Figures 1-4 , the corresponding anti-off clamp 4001 is respectively clamped on the primary side terminal post 6001, the secondary side terminal post 6002 and the shell grounding terminal post 6003 of the electromagnetic starter. After the cover is closed, the power supply switch is powered on, and at this time the primary side terminal post 6001 is powered on. The magnetic attraction coil 1003 is powered on to generate magnetism, and the same polarity repels the magnet 1004. At this time, under the joint action of the spring 1012 and the magnetic attraction coil 1003, the first electric rod 1005 and the second electric rod 1006 slide to the right at the predetermined position, and the test circuit is turned on. The leakage test can be normally carried out. For example, if the input voltage is 660V, the first electric rod 1005 and the second electric rod 1006 will be pushed to the second test electrode 1008 on the right under the joint action of the spring 1012 and the magnetic attraction coil 1003, and the corresponding test resistor 2001 will be automatically selected for leakage test.

[0028] Start the electromagnetic starter and perform remote leakage test.

[0029] Please refer to Figure 3 , Figure 4 When both electric rods are working normally, they are on the same middle electrode 1009 at the same time, and the leakage test is carried out normally. If one of the electric rods is stuck or the spring 1012 has abnormal elasticity due to special reasons, the test circuit will not be turned on, and the leakage test cannot be carried out, so that it can be found in time and repaired or replaced, ensuring the accuracy of the leakage test.

[0030] Please refer to Figure 5 , Figure 5 The anti-off clamp 4001 structure diagram is shown in the figure. The arc clamp 4004 is clamped on the corresponding terminal post. The arc clamp 4004 has a larger contact surface with the cylindrical terminal post, and can rotate 360 degrees around the rotating shaft 4003. When the swing of the wire generates a certain torque on the arc clamp 4004, a part of the acting force can also be released through the rotation of the rotating shaft 4003, effectively avoiding the anti-off clamp 4001 from being separated from the terminal post.

[0031] Without technical scheme conflict, further, the lead wire can be led out at the wiring position of the magnetic attraction coil 1003, and the end of the lead wire is welded on the surface of the shell and used as a test contact. During the test, the equivalent voltage meeting the voltage level is connected, and whether the first conductive rod 1005 and the second conductive rod 1006 accurately slide to the predetermined position is observed. If yes, the device is safe and reliable, and if not, it needs to be checked and maintained. If the test contact is set, the idle electrode 1007 can be removed, the limiting device is arranged on the shell 3001, and the first conductive rod 1005 and the second conductive rod 1006 are limited at the position of the test resistance 2001 being 2kΩ and the right side. Before the leakage test, the test resistance 2001 is connected by default with the resistance being 2kΩ, and the leakage test can be effectively provided for the lighting comprehensive protector.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A remote leakage current testing device for coal mines, comprising a resistor (1001), a rectifier circuit (1002), a magnetic coil (1003), a magnet (1004), a first conductive rod (1005), a second conductive rod (1006), a neutral electrode (1007), a test electrode (1008), an intermediate electrode (1009), a grounding electrode (1010), a slide rod (1011), a spring (1012), a ground wire (1013), a test resistor (2001), and a housing (3001), characterized in that: The resistance (1001), the rectifier circuit (1002), the two groups of magnetic attraction coils (1003), and the ground wire (1013) are connected by wires and form an electric circuit. Each component is fixed with the shell (3001). One end of the slide rod (1011) is fixed vertically with the center position of the magnetic attraction coil (1003), and the other end is fixed with the shell (3001). The magnet (1004) and the spring (1012) are arranged on the slide rod (1011). The magnet (1004) can slide on the slide rod (1011). One end of the spring (1012) is fixed with the magnet (1004), and the other end is fixed with the shell (3001). The magnetism of the side of the magnet (1004) close to the magnetic attraction coil (1003) is the same as the magnetism generated by the magnetic attraction coil (1003) after being electrified. The first conductive rod (1005) and the second conductive rod (1006) are fixedly arranged on the two magnets (1004). One end of the first conductive rod (1005) intermittently contacts the neutral electrode (1007) and the test electrode (1008), and the other end intermittently contacts the intermediate electrode (1009). One end of the second conductive rod (1006) intermittently contacts the intermediate electrode (1009), and the other end slidably contacts the grounding electrode (1010). The test electrode (1008) is connected with one end of the corresponding test resistance (2001) through wires. The other end of the test resistance (2001) is connected in parallel and then led out of the shell through wires. The corresponding test resistances from the magnetic attraction coil (1003) to the test resistance (2001) are 2KΩ resistance, 11KΩ resistance, and 20KΩ resistance, respectively. The first conductive rod (1005) and the second conductive rod (1006) indirectly contact through the corresponding intermediate electrode (1009).

2. The coal mine remote electric leakage testing device according to claim 1, characterized in that: The shell (3001) and the slide rod (1011) are made of non-metallic materials.

3. The coal mine remote electric leakage testing device according to claim 2, characterized in that: The first conductive rod (1005), the second conductive rod (1006), the neutral electrode (1007), the test electrode (1008), the intermediate electrode (1009), and the grounding electrode (1010) are made of conductive materials, and the adjacent test electrodes (1008) and intermediate electrodes (1009) in the horizontal direction are not conductive to each other.

4. The coal mine remote electric leakage testing device according to claim 3, characterized in that: In the natural state, the spring (1012) can push the first conductive rod (1005) and the second conductive rod (1006) to the leftmost side.

5. The coal mine remote electric leakage testing device according to claim 4, characterized in that: The performance indicators of the two magnetic attraction coils (1003), the two magnets (1004), and the two springs (1012) are the same or extremely similar.

6. The coal mine remote electric leakage testing device according to claim 1, characterized in that: Anti-drop clamps (4001) are arranged at the wire inlet end of the resistance (1001), the wire outlet end of the ground wire (1013), and the wire outlet end below the test resistance (2001). The clamping head (4002) of the anti-drop clamp (4001) is connected with an arc-shaped clamp (4004) through a rotating shaft (4003). The arc-shaped clamp (4004) can rotate 360 degrees around the rotating shaft (4003). A slip ring is sleeved on the rotating shaft (4003), and the rotating shaft (4003) is connected with the wire outlet (5001) through the slip ring.

7. The coal mine remote electric leakage testing device according to claim 6, characterized in that: The handheld part of the anti-drop clamp (4001) is made of non-metallic materials.

8. The coal mine remote electric leakage testing device according to claim 7, characterized in that: The rotating shaft (4003), the arc-shaped clamp (4004) and the slip ring are made of conductive material.

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