Cart type cable fault comprehensive testing device

Abstract

The utility model discloses a cart type cable fault comprehensive testing device, which comprises an electromagnetic compatibility case, a bottom plate support is arranged at the bottom of the electromagnetic compatibility case, and movable large wheels are mounted on two sides of the bottom plate support; a high-voltage functional area is arranged in the electromagnetic compatibility case, a multi-pulse functional area is arranged below the high-voltage functional area, a path test functional area is arranged below the multi-pulse functional area, and a resistance test functional area is arranged below the path test functional area; a test wire bin is arranged in the middle of one end outside the electromagnetic compatibility case, and a shielding box is installed in the middle of the other end outside the electromagnetic compatibility case. Compared with an existing device, the cart type cable fault comprehensive testing device has the advantages that a fault point is precisely positioned by adopting an acoustic-magnetic synchronization method after pre-positioning, so that comprehensive and integrated cable fault detection is realized; electromagnetic compatibility is realized by adopting anti-interference technologies such as a shielding box, a shielding wire and a magnetic ring.

Description

Technical Field

[0001] The utility model relates to the technical field of cable fault detection, in particular to a cart-type cable fault comprehensive testing device. Background Art

[0002] Power cables are cable products used to transmit and distribute high-power electric energy in the trunk lines of the power system, including cables of various voltage levels and insulation of 1-500kV and above. With the completion of the transformation of the two networks in my country, safe and convenient underground power cables are increasingly widely used. However, once a cable fails, it is difficult to quickly detect the exact location of the fault point. Failure to eliminate the fault and restore power supply in time often results in significant losses due to power outages and production stoppages. Therefore, how to restore power supply at the fastest speed and the lowest maintenance cost is the primary issue for each power supply department when encountering a cable failure, so a cart-type cable fault comprehensive test device is required.

[0003] With the progress of society and the development of science and technology, people have higher requirements for work efficiency and testing equipment: efficient testing work, integrated testing equipment, diversified functions, stable performance, and convenient movement. The integrated trolley-type cable fault detection equipment has gradually come into people's sight. The equipment has the characteristics of integrated structure, diversified functions, stable performance, easy to move, and convenient operation.

[0004] Traditional split-type cable fault testers, operation boxes, transformers, megohmmeters, arc extension devices, path meter transmitters, etc. are bulky to operate, inconvenient to move, have complex wiring, low efficiency, low safety, and low intelligence and automation. Therefore, we propose a trolley-type cable fault comprehensive test device. Utility Model Content

[0005] The purpose of the utility model is to provide a trolley-type cable fault comprehensive testing device to solve the problems raised in the above background technology that traditional split-type cable fault testers, operation boxes, transformers, megohmmeters, arc extension devices, path meter transmitters, etc. are cumbersome to operate, inconvenient to move, have complex wiring, low efficiency, low safety, low intelligence and low automation.

[0006] To achieve the above purpose, the utility model provides the following technical solution: a cart-type cable fault comprehensive test device, comprising:

[0007] An electromagnetic compatible chassis, wherein a bottom plate bracket is provided at the bottom of the electromagnetic compatible chassis, and large movable wheels are installed on both sides of the bottom plate bracket;

[0008] A human-computer interaction panel is installed on the top of the electromagnetic compatibility chassis, wherein a high-voltage functional area is provided inside the electromagnetic compatibility chassis, and a multiple-pulse functional area is provided below the high-voltage functional area, a path test functional area is provided below the multiple-pulse functional area, and a resistance test functional area is provided below the path test functional area;

[0009] An interface panel is arranged at one end outside the electromagnetic compatibility chassis, a low-voltage interface panel is arranged on the interface panel, a high-voltage interface panel is arranged below the low-voltage interface panel, a test line bin is arranged in the middle of one end outside the electromagnetic compatibility chassis, and a shielding box is installed in the middle of the other end outside the electromagnetic compatibility chassis.

[0010] Preferably, the high voltage functional area is a high voltage unit, the multiple pulse functional area is a multiple pulse generating unit, the path test functional area is a partial component of the high voltage unit and path test, and the resistance test functional area is an insulation resistance test and cable fault pre-positioning.

[0011] Preferably, the human-computer interaction panel is further provided with:

[0012] A touch display screen is installed on the human-computer interaction panel, and a function selection button, a touch mouse board, a mode indicator light and a mode conversion switch are respectively arranged below the touch display screen, and a power switch and an emergency stop knob are arranged on one side of the mode conversion switch.

[0013] Preferably, the center point of the human-machine interaction panel and the electromagnetic compatibility chassis are on the same vertical line, and the angle between the human-machine interaction panel and the electromagnetic compatibility chassis is 18°.

[0014] Preferably, the low-voltage interface panel and the high-voltage interface panel are parallel to each other, and both the low-voltage interface panel and the high-voltage interface panel are fixedly connected to the electromagnetic compatibility chassis.

[0015] Preferably, the test wire bin and the horizontal center line of the electromagnetic compatibility chassis coincide with each other, and the test wire bin has a built-in wire coil rack, and the wire bin door is easy to open and close.

[0016] Preferably, a shielding wire and a magnetic ring are provided in the shielding box.

[0017] Compared with the prior art, the utility model provides a cart-type cable fault comprehensive test device, which has the following beneficial effects:

[0018] The utility model optimizes the electromagnetic compatibility chassis through the cart-type layered partition structure, the ergonomic operation control human-machine interaction panel, the multi-voltage level signal input and output interface panel, and the embedded high and low voltage test line warehouse. The internal part of the device is composed of various systems, including insulation resistance test, cable fault pre-location, high voltage unit, multiple pulse generation unit and path test. Each system is connected to the corresponding panel and interface corresponding to each test function. The cable fault pre-location adopts the time domain reflection principle to pre-locate the fault point. If it is a high-resistance fault, the integrated high-voltage unit is used to break down the fault point, and its low-resistance characteristics in the arcing transient state are pre-located by the dual low-voltage pulse method. If it is a low-resistance fault, low-voltage pulse time domain reflection is used for direct pre-location; after pre-location, the acoustic-magnetic synchronization method is used to accurately locate the fault point to achieve comprehensive integrated cable fault detection; anti-interference technologies such as shielding boxes, shielding wires and magnetic rings are used to achieve electromagnetic compatibility, avoiding the problems of traditional split-type cable fault testers, operation boxes, transformers, megohmmeters, arc extension devices, path meter transmitters, etc., which are cumbersome to operate, inconvenient to move, complex wiring, low efficiency, low safety, low intelligence and low automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 3 This is a system connection block diagram of the utility model;

[0022] Figure 4 It is a schematic diagram of the back structure of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the control panel of the utility model;

[0024] Figure 6 This is a functional module block diagram of the utility model.

[0025] In the figure: 1. Electromagnetic compatibility chassis; 101. High voltage functional area; 102. Multiple pulse functional area; 103. Path test functional area; 104. Resistance test functional area; 2. Human-computer interaction panel; 201. Touch display screen; 202. Function selection button; 203. Touch mouse board; 204. Mode indicator light; 205. Mode conversion switch; 206. Power switch; 207. Emergency stop knob; 3. Moving large wheel; 4. Bottom plate bracket; 5. Interface panel; 501. Low voltage interface panel; 502. High voltage interface panel; 6. Test line bin; 7. Shielding box. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-3 A trolley-type cable fault comprehensive test device comprises: an electromagnetic compatibility chassis 1, a bottom plate bracket 4 is arranged at the bottom of the electromagnetic compatibility chassis 1, and large movable wheels 3 are installed on both sides of the bottom plate bracket 4; the wheel structure facilitates the daily use and movement of the instrument, and the bracket structure facilitates the normal operation and safe use of the instrument; a high-voltage functional area 101 is arranged inside the electromagnetic compatibility chassis 1, and a multiple pulse functional area 102 is arranged below the high-voltage functional area 101, a path test functional area 103 is arranged below the multiple pulse functional area 102, and a resistance test functional area 104 is arranged below the path test functional area 103, and in the path test, the path test mainboard is connected to the path test interface at the upper end; the multiple modules in the multiple pulse generating unit are connected to the multiple capacitors, and the multiple capacitors are then connected to the multiple resistors and connected to the conversion mechanism and then connected to the multiple ports at the lower end; the high-voltage functional area 101 is a high-voltage unit, the multiple pulse functional area 102 is a multiple pulse generating unit, the path test functional area 103 is a part of the high-voltage unit components and the path test and resistance test functional areas 104 are insulation Resistance test and cable fault pre-location; the high-voltage unit is a three-layer structure, the first layer is a fixed capacitor and a discharge mechanism; the second layer is for installing transformers, voltage doublers, and sparking mechanisms; the third layer is for installing the main circuit board, fixing 36V and 12V switching power supplies, and fixing the discharge board, and connecting the components of each layer, wherein the 36V switching power supply is connected to the discharge board, the discharge board is connected to the sparking mechanism, the 12V switching power supply is connected to the radiator for cooling, and the transformer and voltage doubler are connected. This structure provides high-voltage components for the system; in the insulation resistance test, the insulation resistance test main board is connected to the battery, and then to the high-voltage output interface at the upper rear end; in the cable fault pre-location, the flash tester main board is connected to the battery and then to relay 1 and the test board, relay 1 is connected to relay 2, and relay 2 is connected to the test board and then to the low-voltage pulse at the upper rear end; the functional area presents an integrated layout in terms of electrical connections, which effectively reduces high-voltage interference, and has built-in various test units, covering insulation resistance testing, cable fault location, cable path detection, cable fault precise location and other functions, effectively reducing local discharge problems.

[0028] See also Figure 4-6, a trolley-type cable fault comprehensive test device, comprising: a human-machine interaction panel 2, which is installed on the top of an electromagnetic compatibility chassis 1, the center points of the human-machine interaction panel 2 and the electromagnetic compatibility chassis 1 are on the same vertical line, and the angle between the human-machine interaction panel 2 and the electromagnetic compatibility chassis 1 is 18°; it not only improves the physical and mental adaptability of the instrument user, but also reduces the fatigue caused by using the instrument, a touch display screen 201, which is installed on the human-machine interaction panel 2, and a function selection button 202, a touch mouse board 203, a mode indicator light 204 and a mode conversion switch 205 are respectively arranged below the touch display screen 201, and a power switch 206 and an emergency stop knob 207 are arranged on one side of the mode conversion switch 205; an interface panel 5, which is arranged at one end outside the electromagnetic compatibility chassis 1, a low-voltage interface panel 501 is arranged on the interface panel 5, and a high-voltage interface panel 502 is arranged below the low-voltage interface panel 501; the low-voltage interface panel 501 It is parallel to the high-voltage interface panel 502, and both the low-voltage interface panel 501 and the high-voltage interface panel 502 are fixedly connected to the electromagnetic compatibility chassis 1. The voltage level classification and separate wiring method are used in the electrical layout between the systems inside the device, which effectively reduces the high-voltage interference; a test line bin 6 is arranged in the middle of one end outside the electromagnetic compatibility chassis 1, and the test line bin 6 coincides with the horizontal center line of the electromagnetic compatibility chassis 1, and the test line bin 6 has a built-in wire coil rack, and the wire bin door is convenient to open and close; it not only reasonably utilizes the space, but also improves the beauty and practicality of the instrument; a shielding box 7 is installed in the middle of the other end outside the electromagnetic compatibility chassis 1; shielding wires and magnetic rings are arranged in the shielding box 7; anti-interference technologies such as the shielding box 7, shielding wires and magnetic rings are mainly used to cut off the transmission path between high-voltage electric fields, magnetic fields, etc. to data processing and display modules, which are all measures to reduce high-voltage interference, effectively solve the electromagnetic interference problem caused by high voltage and discharge, and provide a strong guarantee for the stable operation of the instrument.

[0029] Working principle: When using the trolley-type cable fault comprehensive test device, first, when performing a digital insulation resistance test, make sure that the test line is connected before turning on the machine. Turn on the machine: press and hold the power switch 206, release it after the touch display screen 201 lights up, press the item button, select and display: four test methods: absorption ratio, polarization index, quick test and insulation test, press the voltage button, select and display: 500V, 1000V, 2500V, 5000V four-speed output high voltage, press the start button to start the boost test, and the measurement result is directly displayed after the test is completed. Turn off the machine: press and hold the power switch 206, there is a sound prompt, and release it after the sound disappears. Manual discharge must be performed before removing the wiring. Make sure that the discharge is completed before the wiring can be removed; secondly, when performing cable fault distance measurement, first connect the test according to the selected test method. Test the line, turn on the cable fault distance measurement host, open the cable fault test software, refer to the test method, sampling frequency and cable type selected in the test settings, click single or continuous sampling to display the collected waveform on the screen, select the more ideal waveform to position, and the fault distance can be displayed; then when using the high-frequency and high-voltage power supply part, there are three main usage scenarios of the high-frequency and high-voltage power supply part. The first is to output DC voltage; the second is to output high-voltage pulses; the third is to output multiple high-voltage pulses, which needs to be combined with multiple pulse generating units. The first usage operation process: connect the test line, set the mode selection switch on the control panel to the flash gear, connect the power supply, turn on the power switch, lift the emergency stop knob, select the voltage mode on the touch screen interface, enter the required set voltage value, and start the boost. After the test is completed, first stop the boost operation, then press the emergency stop switch, turn off the power switch, and the wires can be removed after the artificial discharge is completed. The second operation process: connect the test line, set the mode selection switch on the control panel to the flash gear, connect the power supply, turn on the power switch, lift the emergency stop knob, select the voltage mode on the touch screen interface, enter the required set voltage value, start the boost, and select continuous pulse output. After the test is completed, first stop the boost operation, then press the emergency stop switch, turn off the power switch, and the wires can be removed after the artificial discharge is completed. The third operation process: connect the test line, set the mode selection switch on the control panel to the multiple pulse gear, connect the power supply, turn on the power switch, lift the emergency stop knob, select the voltage mode on the touch screen interface, enter the required set voltage value, start the boost, and select continuous pulse output.After the test is completed, first stop the boost operation, then press the emergency stop switch and turn off the power switch. The wires can be removed only after the artificial discharge is completed. Finally, when conducting the cable path test, first connect one end of the red test line to the signal output port of the path test on the interface panel, and the other end, i.e., the clip, to one phase of the cable core wire whose path needs to be found. Then connect one end of the black test line to the grounding port of the path test on the interface panel, and the other end, i.e., the clip, to the system ground. Then connect the test core wire terminal of the cable to the system ground. Finally, connect the power supply, turn on the power switch 206, and conduct the test in conjunction with the path receiver. This is the working principle of the cart-type cable fault comprehensive test device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cart-type cable fault comprehensive testing device, characterized in that: include: An electromagnetic compatible chassis (1), wherein a bottom plate bracket (4) is provided at the bottom of the electromagnetic compatible chassis (1), and large movable wheels (3) are installed on both sides of the bottom plate bracket (4); A human-machine interaction panel (2) is installed on the top of the electromagnetic compatibility case (1), wherein a high voltage functional area (101) is arranged inside the electromagnetic compatibility case (1), and a multiple pulse functional area (102) is arranged below the high voltage functional area (101), a path test functional area (103) is arranged below the multiple pulse functional area (102), and a resistance test functional area (104) is arranged below the path test functional area (103); An interface panel (5) is arranged at one end outside the electromagnetic compatibility case (1); a low-voltage interface panel (501) is arranged on the interface panel (5); a high-voltage interface panel (502) is arranged below the low-voltage interface panel (501); a test line compartment (6) is arranged in the middle of one end outside the electromagnetic compatibility case (1); and a shielding box (7) is installed in the middle of the other end outside the electromagnetic compatibility case (1).

2. A cart-type cable fault comprehensive testing device according to claim 1, characterized in that: The high voltage functional area (101) is a high voltage unit, the multiple pulse functional area (102) is a multiple pulse generating unit, the path test functional area (103) is a part of the high voltage unit components and path test, and the resistance test functional area (104) is an insulation resistance test and cable fault pre-location.

3. A cart-type cable fault comprehensive testing device according to claim 1, characterized in that: The human-machine interaction panel (2) is also provided with: A touch display screen (201) is mounted on the human-machine interaction panel (2), and a function selection button (202), a touch mouse panel (203), a mode indicator light (204) and a mode conversion switch (205) are respectively arranged below the touch display screen (201), and a power switch (206) and an emergency stop knob (207) are arranged on one side of the mode conversion switch (205).

4. A cart-type cable fault comprehensive testing device according to claim 1, characterized in that: The center points of the human-machine interaction panel (2) and the electromagnetic compatibility chassis (1) are located on the same vertical line, and the angle between the human-machine interaction panel (2) and the electromagnetic compatibility chassis (1) is 18°.

5. A cart-type cable fault comprehensive testing device according to claim 1, characterized in that: The low-voltage interface panel (501) and the high-voltage interface panel (502) are parallel to each other, and both the low-voltage interface panel (501) and the high-voltage interface panel (502) are fixedly connected to the electromagnetic compatibility chassis (1).

6. A cart-type cable fault comprehensive testing device according to claim 1, characterized in that: The horizontal center lines of the test wire bin (6) and the electromagnetic compatibility chassis (1) coincide with each other, and the test wire bin (6) has a built-in wire coiling rack, and the wire bin door is convenient for opening and closing.

7. A cart-type cable fault comprehensive testing device according to claim 1, characterized in that: The shielding box (7) is provided with a shielding wire and a magnetic ring.

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