Simple cable grounding detection device

Abstract

A simple cable grounding detection device is composed of a pointer type magnetic field detecting instrument, one end of the pointer type magnetic field detecting instrument is connected with a wire serving as an A end of a cable detection wiring, the other end of the pointer type magnetic field detecting instrument is connected with another wire, and a resistor R4 serving as a B end of the cable detection wiring is connected to the other wire in series. A pair of opposite diodes VD2 and VD3 are connected in parallel at two ends of the pointer type magnetic field detector, a series branch formed by a resistor R1, a resistor R2, a resistor R3 and a diode VD1 is connected in parallel between the A end of the cable detection connecting wire and the B end of the cable detection connecting wire, and the A end of the cable detection connecting wire is connected with a power supply circuit with a switch.

Description

Technical Field

[0001] The utility model relates to a cable grounding detection device, in particular to a simple cable grounding detection device. Background Art

[0002] As is well known, in underground mines, in each mining face power supply network, at least a dozen or more rubber-sheathed cables are laid. During production, the cables are occasionally scratched, triggering the leakage protection and causing the working face to power off. Due to the complex on-site environment, and each cable is at least two or three hundred meters long, it is very difficult to determine the fault point of the grounding point. Compared with groping bit by bit in the intricate circuit, the current method is to use a megger to measure which cable is leaking electricity, and then dispatch elite forces to replace the entire cable. A series of operations take at least 7 or 8 hours at the fastest, directly affecting the completion of the production task. At present, for the commercially available cable fault detection equipment, each instrument costs as high as more than 500,000 yuan, and the positioning accuracy is not very accurate. Therefore, designing a simple cable grounding detection device with low price and capable of quickly finding the cable break point is a technical problem that needs to be solved at present. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a simple cable grounding detection device with low price and capable of quickly finding the cable break point.

[0004] The technical solution adopted by the utility model to solve its technical problem is as follows:

[0005] The simple cable grounding detection device is composed of a pointer-type magnetic field detector. One end of the pointer-type magnetic field detector is connected with a wire as the A end of the cable detection wiring. The other end of the pointer-type magnetic field detector is connected with another wire and a resistor R4 is connected in series on it as the B end of the cable detection wiring. A pair of reverse diodes VD2 and VD3 are connected in parallel at both ends of the pointer-type magnetic field detector. A series branch composed of a resistor R1, a resistor R2, a resistor R3 and a diode VD1 is connected in parallel between the A end and the B end of the cable detection wiring. A power supply circuit with a switch is connected to the A end of the cable detection wiring.

[0006] As a preferred solution of the utility model, the power supply circuit with a switch is composed of a resistor R5, a resistor R6, a 3V battery, a 9V battery, an indicator light HR and a switch Q. One end of the resistor R5 and the resistor R6 is connected to the A end of the cable detection wiring. The other end of the resistor R6 is connected to the positive pole of the 3V battery. The negative pole of the 3V battery is connected to the negative pole of the 9V battery. The positive pole of the 9V battery is connected to one end of the switch Q. The other end of the switch Q is connected to the other end of the resistor R5. The indicator light HR is connected in parallel at both ends of the 9V battery.

[0007] As a preferred embodiment of the present utility model, a fuse FU is provided between the positive electrode of the 9V battery and the switch Q.

[0008] As a preferred embodiment of the present utility model, a fuse F is provided between the B end of the cable detection connection and the parallel connection of the resistors R3 and R4.

[0009] As a preferred embodiment of the present utility model, the pointer type magnetic field detector is composed of an indicating disk, a double-extended shaft, a pointer and a coil. The shaft is rotatably fixed on the indicating disk, the pointer is fixed at one end of the double-extended shaft, the coil is sleeved on the other end of the double-extended shaft, the indicating disk is installed at the inner front end of the housing, a transparent glass plate is clamped outside the indicating disk, a circuit board is fixed at the inner rear end of the housing, the diodes VD1, VD2, VD3, the resistors R1, R2, R3, R4, R5, R6, the 3V battery, the 9V battery, the indicator lamp HR and the switch Q are all installed on the circuit board, and both ends of the pointer type magnetic field detector are the two ends of the coil (1-6).

[0010] Principle of the present utility model:

[0011] Utilize the principle of detecting the resistance value to the ground.

[0012] Usage method of the present utility model:

[0013] When in use, first use a megger to check out the faulty cable, then connect the simple cable grounding detection device to the phase wire and the ground wire of the cable respectively, close the switch of the simple cable grounding detection device, the power supply outputs a safe current, one person observes the instrument, and another person shakes the cable along the line, communicating with a carrier handheld machine at any time. When shaking to the fault point, due to the change in the grounding resistance value, the resistance value of the simple cable grounding detection device will fluctuate, and the fault point can be accurately determined.

[0014] Compared with the prior art, using the present utility model to find the fault point, the power supply can be restored in 20 minutes, greatly improving the work efficiency compared with the past, reducing the labor intensity of workers, reducing the cost investment of new cables, and obtaining unanimous praise from people in the electromechanical industry. The self-made simple cable grounding detection device only costs more than 1000 yuan, effectively achieving the effect of achieving great things with little money. Brief description of the drawings

[0015] Figure 1 is the circuit diagram of the present utility model;

[0016] Figure 2 is the structural schematic diagram of the present utility model;

[0017] Figure 3 is Figure 2 the side view of Specific embodiments

[0018] As shown in the figure, a simple cable grounding detection device consists of a pointer-type magnetic field detector 1. One end of the pointer-type magnetic field detector 1 is connected with a wire as the A end of the cable detection wiring. The other end of the pointer-type magnetic field detector 1 is connected with another wire and a resistor R4 is connected in series on it as the B end of the cable detection wiring. A pair of reverse diodes VD2 and VD3 are connected in parallel at both ends of the pointer-type magnetic field detector 1. A series branch composed of a resistor R1, a resistor R2, a resistor R3 and a diode VD1 is connected in parallel between the A end and the B end of the cable detection wiring. A power supply circuit 2 with a switch is connected to the A end of the cable detection wiring.

[0019] The power supply circuit 2 with a switch is composed of a resistor R5, a resistor R6, a 3V battery 2-1, a 9V battery 2-2, an indicator light HR and a switch Q. One end of the resistor R5 and the resistor R6 is connected to the A end of the cable detection wiring. The other end of the resistor R6 is connected to the positive electrode of the 3V battery 2-1. The negative electrode of the 3V battery 2-1 is connected to the negative electrode of the 9V battery 2-2. The positive electrode of the 9V battery 2-2 is connected to one end of the switch Q. The other end of the switch Q is connected to the other end of the resistor R5. The indicator light HR is connected in parallel at both ends of the 9V battery 2-2.

[0020] A fuse FU is provided between the positive electrode of the 9V battery 2-2 and the switch Q.

[0021] A fuse F is provided between the B end of the cable detection wiring and the parallel connection of the resistor R3 and the resistor R4.

[0022] The pointer-type magnetic field detector 1 is composed of an indicating disk 1-1, a double-extended shaft 1-0, a pointer 1-2 and a coil 1-6. The shaft 1-0 is rotatably fixed on the indicating disk 1-1. The pointer 1-2 is fixed at one end of the double-extended shaft 1-0. The coil 1-6 is sleeved on the other end of the double-extended shaft 1-0. The indicating disk 1-1 is installed at the inner front end of the housing 1-4. A transparent glass plate 1-3 is clamped outside the indicating disk 1-1. A circuit board 1-5 is fixed at the inner rear end of the housing 1-4. The diode VD1, the diode VD2, the diode VD3, the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the 3V battery 2-1, the 9V battery 2-2, the indicator light HR and the switch Q are all installed on the circuit board 1-5. Both ends of the pointer-type magnetic field detector 1 are the two ends of the coil 1-6.

Claims

1. A simple cable grounding detection device, comprising a pointer-type magnetic field detector (1), characterized in that: A wire is connected to one end of the pointer-type magnetic field detector (1) as the A end of the cable detection wiring, another wire is connected to the other end of the pointer-type magnetic field detector (1) and a resistor R4 is connected in series therewith as the B end of the cable detection wiring, a pair of reverse diodes VD2 and VD3 are connected in parallel at both ends of the pointer-type magnetic field detector (1), a series branch consisting of resistors R1, R2, R3 and diode VD1 is connected in parallel between the A end of the cable detection wiring and the B end of the cable detection wiring, and a power supply circuit (2) with a switch is connected to the A end of the cable detection wiring.

2. The simple cable grounding detection device according to claim 1, characterized in that: The power supply circuit (2) with switch is composed of a resistor R5, a resistor R6, a 3V battery (2-1), a 9V battery (2-2), an indicator light HR and a switch Q. One end of the resistor R5 and the resistor R6 are connected to the A end of the cable detection wiring, the other end of the resistor R6 is connected to the positive electrode of the 3V battery (2-1), the negative electrode of the 3V battery (2-1) is connected to the negative electrode of the 9V battery (2-2), the positive electrode of the 9V battery (2-2) is connected to one end of the switch Q, the other end of the switch Q is connected to the other end of the resistor R5, and the indicator light HR is connected in parallel to the two ends of the 9V battery (2-2).

3. The simple cable grounding detection device according to claim 2, characterized in that: A fuse FU is provided between the positive electrode of the 9V battery (2-2) and the switch Q.

4. The simple cable grounding detection device according to claim 1, characterized in that: A fuse F is provided between the B end of the cable detection connection and the parallel connection of the resistor R3 and the resistor R4.

5. The simple cable grounding detection device according to claim 1, characterized in that: The pointer-type magnetic field detector (1) is composed of an indicating disk (1-1), a double-extended shaft (1-0), a pointer (1-2) and a coil (1-6); the shaft (1-0) is rotatably fixed on the indicating disk (1-1); the pointer (1-2) is fixed on one end of the double-extended shaft (1-0); the coil (1-6) is sleeved on the other end of the double-extended shaft (1-0); the indicating disk (1-1) is mounted on the inner front end of a housing (1-4); a transparent glass plate (1-3) is mounted on the outer card of the indicating disk (1-1); a circuit board (1-5) is fixed on the inner rear end of the housing (1-4); a diode VD1, a diode VD2, a diode VD3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a 3V battery (2-1), a 9V battery (2-2), an indicator light HR and a switch Q are all mounted on the circuit board (1-5); and the two ends of the pointer-type magnetic field detector (1) are the two ends of the coil (1-6).

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