Multifunctional cable test wiring system

Abstract

The utility model relates to the field of cable fault tests, in particular to a multifunctional cable test wiring system. Comprising a wiring tester body, a main control module, a switch execution module and a temperature sensing module, the switch execution module comprises a three-phase input end, a switch knob and a three-phase output end, the three-phase input end is connected with the switch knob, the switch knob is connected with the three-phase input end, and the switch execution module is connected with the main control module; the main control module is connected with the output end of the temperature sensing module, the three-phase input ports are arranged on the multifunctional cable test wiring system, cable test wiring testing can be completed by switching cable input ports of different phases, the problems of complexity and low safety when high-altitude operation is needed in existing cable test wiring testing are solved, and the multifunctional cable test wiring system has the advantages of being simple in structure and convenient to use. The working efficiency of the cable wiring test is improved, and the use safety of the cable test wiring system is enhanced. Over-temperature protection is added to the three-phase output port, so that the safety performance in the using process is improved.

Description

Technical Field

[0001] The utility model relates to the field of cable fault tests, and particularly relates to a multifunctional cable test wiring system. Background Art

[0002] With the increasingly wide application of power cables in power transmission, the laying methods of cables have become diverse. At the same time, various handover and preventive tests need to be carried out on the cables regularly. The insulation test or withstand voltage test of the cables must be carried out phase by phase. When the position of the cable terminal is relatively superior, the test is relatively simple and convenient. When the existing cable test wiring device is in use, when the cable terminal is on the electric pole, it is necessary to arrange climbers to first remove the cable terminal from the connecting device and then carry out the test phase by phase. After each test is completed, it is necessary to climb the pole again to replace the test lead. Under normal operating conditions, to complete the three-phase test of 1 circuit of cable, it is necessary to climb the pole back and forth 4 times, which greatly increases the on-site operation risk and workload and reduces the work efficiency. Compared with the traditional situation of climbing the pole back and forth to switch the test line, the utility model provides a multifunctional cable test wiring system, which only needs to make one round trip of climbing the pole to lead down all the cores of the cable to be tested, and only needs to make one wiring to carry out the three-phase cable test respectively. The whole wiring system is simple to operate and highly reliable, effectively improving the on-site work efficiency and reducing the operation risk. Content of the Utility Model

[0003] In order to solve the above problems in the prior art, the first object of the utility model is to provide a multifunctional cable test wiring system for simplifying the high-altitude cable fault test steps and reducing the high-altitude on-site operation risk.

[0004] To achieve the above object, the solution provided by the utility model is: a multifunctional cable test wiring system, comprising: a wiring tester main body, a main control module, a switch execution module and a temperature sensing module. The switch execution module includes a three-phase input end, a switch knob and a three-phase output end. The three-phase input end is connected to the switch knob, and the switch knob is connected to the three-phase input end. The switch execution module is connected to the main control module. The main control module is connected to the output end of the temperature sensing module. The main control module is used to receive the data fed back by the temperature sensor, and transmit the temperature, time, three-phase switch state, etc. to the switch execution module for wiring system control, and perform over-temperature protection when a high-temperature situation occurs in the three-phase output of the cable.

[0005] As a further improvement of the present utility model, the main control module includes a switch control unit, a data receiving unit, and a data processing unit. The data receiving unit and the data processing unit are used to analyze and process the temperature data, time data, etc. input by the temperature sensor, and transmit the processed data to the switch control unit, which controls the switching of the switch knob and the over-temperature protection of the three-phase output terminal.

[0006] As a further improvement of the present utility model, the temperature sensing module includes a low-temperature coefficient oscillator, a first subtraction counter, a second subtraction counter, a slope accumulator, a counting comparator, a high-temperature coefficient oscillator, and a temperature register. The first subtraction counter is connected to the slope accumulator, the low-temperature coefficient oscillator, and the temperature register. The slope accumulator is connected to the first subtraction counter and the counting comparator. The counting comparator is connected to the temperature register. The high-temperature coefficient oscillator is connected to the second subtraction counter, and the second subtraction counter is connected to the temperature register.

[0007] The temperature sensing module is used to collect the sensible temperature inside the device of the cable test wiring system, convert the analog temperature into an available output electrical signal, and perform over-temperature protection on the three-phase circuit of the cable by monitoring the electrical signal parameters.

[0008] As a further improvement of the present utility model, the temperature measurement range of the temperature sensing module is from -45 degrees to 130 degrees, and the resolution of the temperature sensing module is less than 0.005K, so that the measurement precision is higher and the temperature control is more accurate.

[0009] As a further improvement of the present utility model, the switch knob is provided with an A-phase test knob, a B-phase test knob, a C-phase test knob, a three-phase grounding knob, and a three-phase floating knob. The switch knob can change the wiring state of the connector, thereby controlling the wiring tester to enter different test states.

[0010] As a further improvement of the present utility model, the wiring tester body is further provided with cable wiring ports, and the wiring ports are respectively connected to the three-phase input ends of the switch execution module for input testing of cables with different phases.

[0011] As a further improvement of the present utility model, an electromagnetic relay is provided between the three-phase input end of the switch execution module and the switch knob. A first electromagnetic relay is provided between the first phase input end and the A-phase test knob. A second electromagnetic relay is provided between the second phase input end and the B-phase test knob. A third electromagnetic relay is provided between the third phase input end and the C-phase test knob. By using the electromagnetic relay to control the three-phase circuit, the switching of different working modes of the wiring tester is completed, and the switching switch signal can be responded more quickly and rapidly.

[0012] As a further improvement of the present utility model, the main control module is further connected with a display module, and the display module is provided with a liquid crystal display screen for developing a human-computer interaction interface and displaying the main parameters received by the system.

[0013] The beneficial effects of the present utility model are as follows:

[0014] By setting three-phase input ports on the multi-functional cable test wiring system, the three-phase working mode can be switched, and the cable test wiring test can be completed by switching the cable input ports of different phases, solving the problems of cumbersome and low safety during high-altitude operation in the existing cable test wiring test, improving the working efficiency of the cable wiring test, and enhancing the use safety of the cable test wiring system. By adding over-temperature protection to the three-phase output ports, the safety performance during use is improved. Description of the Drawings

[0015] Figure 1 is the system block diagram of a multi-functional cable test wiring system of the present utility model;

[0016] Figure 2 is the module block diagram of the temperature sensing module in a multi-functional cable test wiring system of the present utility model;

[0017] Figure 3 is the topological diagram of the switch execution circuit in the first embodiment of the present utility model. Detailed Embodiment

[0018] The specific embodiments of the present utility model will be described in detail below. It should be noted that the embodiments described here are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the following embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] An embodiment of the present utility model provides a multi-functional cable test wiring system. Refer to Figures 1 to 3, including: a wiring tester main body, a main control module, a switch execution module and a temperature sensing module. The switch execution module includes a three-phase input terminal, a switch knob and a three-phase output terminal. The three-phase input terminal is connected to the switch knob, and the switch knob is connected to the three-phase input terminal. The switch execution module is connected to the main control module. The main control module is connected to the output terminal of the temperature sensing module. The main control module is used to receive the data fed back by the temperature sensor, and transmit the temperature, time, three-phase switch state, etc. to the switch execution module for wiring system control, and perform over-temperature protection when a high temperature occurs at the three-phase output of the cable. The wiring tester main body is used to carry the hardware for realizing the system functions. The main control module is used for data reception, data processing and control of function modules of the cable test wiring system. The switch execution module is used to realize the main functions of the cable test wiring system, and disconnect and connect different-phase cables to the circuit in the cable test wiring system. The temperature sensing module is used to monitor the real-time temperature of the cable test wiring system and transmit it to the main control module for over-temperature protection control of the cable test wiring system.

[0020] Refer to Figures 1 to 3 , in this embodiment, the main control module includes a switch control unit, a data reception unit and a data processing unit. The data reception unit and the data processing unit are used to analyze and process the temperature data, time data, etc. input by the temperature sensor, and transmit the processed data to the switch control unit to control the switching of the switch knob and the over-temperature protection of the three-phase output terminal through the switch control unit. The main control chip of the main control module selects GD32F450IGH6.

[0021] Refer to Figures 1 to 3 , in this embodiment, the temperature sensing module includes a low temperature coefficient oscillator, a first subtraction counter, a second subtraction counter, a slope accumulator, a count comparator, a high temperature coefficient oscillator and a temperature register. The first subtraction counter is connected to the slope accumulator, the low temperature coefficient oscillator and the temperature register. The slope accumulator is connected to the first subtraction counter and the count comparator. The count comparator is connected to the temperature register. The high temperature coefficient oscillator is connected to the second subtraction counter, and the second subtraction counter is connected to the temperature register.

[0022] Refer to Figures 1 to 3 , in this embodiment, the temperature sensor is an integrated digital sensor, and its internal single-bus design can directly convert the temperature analog quantity collected into a digital quantity and send it to the main control module for data processing. The temperature sensing module is used to collect the sensible temperature inside the device of the cable test wiring system, convert the analog temperature into an available output electrical signal, and perform over-temperature protection on the three-phase circuit of the cable by monitoring the electrical signal parameters.

[0023] Among them, the low-temperature coefficient oscillator is less affected by temperature and provides a continuous clock pulse signal to be sent to the first subtraction counter. The high-temperature coefficient oscillator has a large change in oscillation frequency under the influence of temperature, and the generated signal is used as the pulse input of the second subtraction counter. The first subtraction counter performs subtraction counting on the pulse signal generated by the low-temperature coefficient crystal oscillator. When the preset value of the first subtraction counter is subtracted to 0, the value of the temperature register will be incremented by 1, the preset of the first subtraction counter will be reloaded, and the first subtraction counter will start counting the pulse signal generated by the low-temperature coefficient crystal oscillator again. This cycle continues until the second subtraction counter counts to 0, at which point the accumulation of the temperature register value stops. At this time, the value in the temperature register is the measured temperature. In the temperature sensing module, the slope accumulator can correct and supplement the non-linearity during the temperature measurement process of the temperature sensing module.

[0024] Refer to Figures 1 to 3 , in this embodiment, the temperature measurement range of the temperature sensing module is from -45 degrees to 130 degrees, and moreover, the resolution of the temperature sensing module is less than 0.005K, so the measurement precision is higher and the temperature control is more accurate.

[0025] Refer to Figures 1 to 3 , in this embodiment, the switch knob is provided with an A-phase test knob, a B-phase test knob, a C-phase test knob, a three-phase grounding knob, and a three-phase floating knob. The switch knob can change the wiring state of the connector, thereby controlling the wiring tester to enter different test states.

[0026] Refer to Figures 1 to 3 , in this embodiment, the main body of the wiring tester is further provided with a cable wiring port, and the wiring ports are respectively connected to the three-phase input ends of the switch execution module for the input test of cables with different phases.

[0027] Refer to Figures 1 to 3 , in this embodiment, an electromagnetic relay is provided between the three-phase input ends of the switch execution module and the switch knob. A first electromagnetic relay is provided between the first phase input end and the A-phase test knob, a second electromagnetic relay is provided between the second phase input end and the B-phase test knob, and a third electromagnetic relay is provided between the third phase input end and the C-phase test knob. By using the electromagnetic relay to control the three-phase loop circuit, the switching of different working modes of the wiring tester is completed, and the switching switch signal can be responded more quickly and rapidly.

[0028] Refer to Figures 1 to 3, in the circuit of the switch execution module, an electromagnetic relay is set as a switch between the three-phase input terminal and the three-phase output terminal and is connected to the switch knob. When the switch of the control circuit is closed, current flows through the relay coil. According to the electromagnetic effect, at this time, the iron core in the coil generates electromagnetic suction, and the armature is attracted to the iron core under the action of the electromagnetic suction, overcoming the tension of the spring. At the same time, the switch piece at the far end of the armature will close the switch contact of the high-voltage circuit, and the measured phase of the junction box is conducted.

[0029] When the switch of the control circuit is opened, the current in the relay coil disappears, and the electromagnetic suction of the iron core disappears accordingly. At this time, the armature moves away from the iron core under the action of the spring tension, and the switch piece at the far end disconnects the switch contact of the high-voltage circuit at the same time, and the measured phase of the junction box is disconnected accordingly, so as to control the cable test wiring system to access cables with different phases and enter different working modes.

[0030] Refer to Figures 1 to 3 , the second embodiment of the present utility model proposes a multi-functional cable test junction box applicable to the above multi-functional cable test wiring system, including a wiring tester main body, a main control module, a switch execution module and a temperature sensing module. The switch execution module includes a three-phase input terminal, a switch knob and a three-phase output terminal. The three-phase input terminal is connected to the switch knob, and the switch knob is connected to the three-phase input terminal. The switch execution module is connected to the main control module; the main control module is connected to the output end of the temperature sensing module. The main control module is used to receive the data fed back by the temperature sensor and transmit the temperature, time, three-phase switch state, etc. to the switch execution module for wiring system control, and perform over-temperature protection when the temperature is too high at the three-phase output of the cable. The wiring tester main body is used to carry the hardware for realizing the system functions. The main control module is used for data reception, data processing and control of function modules of the cable test wiring system. The switch execution module is used to realize the main functions of the cable test wiring system and disconnect and connect the access circuits of cables with different phases in the cable test wiring system. The temperature sensing module is used to monitor the real-time temperature of the cable test wiring system and transmit it to the main control module to perform over-temperature protection control on the cable test wiring system.

[0031] Refer to Figures 1 to 3, the third embodiment of the present utility model also proposes a multifunctional cable test wiring system, including: a wiring tester main body, a main control module, a switch execution module, and a temperature sensing module. The switch execution module includes a three-phase input end, a switch knob, and a three-phase output end. The three-phase input end is connected to the switch knob, and the switch knob is connected to the three-phase input end. The switch execution module is connected to the main control module; the main control module is connected to the output end of the temperature sensing module. The main control module is used to receive the data fed back by the temperature sensor, and transmit the temperature, time, three-phase switch state, etc. to the switch execution module for wiring system control, and perform over-temperature protection when a high-temperature situation occurs at the three-phase output of the cable. The wiring tester main body is used to carry the hardware for realizing the system functions. The main control module is used for data reception, data processing, and control of functional modules of the cable test wiring system. The switch execution module is used to realize the main functions of the cable test wiring system, and disconnect and connect different-phase cables to the circuit in the cable test wiring system. The temperature sensing module is used to monitor the real-time temperature of the cable test wiring system and transmit it to the main control module to perform over-temperature protection control on the cable test wiring system. The temperature sensing module is provided with a thermistor. Through the characteristic that the resistance value of the thermistor changes with temperature, the temperature analog quantity is converted into the change of the electrical signal generated by the resistance value change, and it is fed back to the main control module as the temperature measurement value.

[0032] In this embodiment, by setting three-phase input ports on the multifunctional cable test wiring system, the three-phase working mode can be switched, and the cable test wiring test can be completed by switching the cable input ports of different phases, which solves the problems of cumbersome and low safety during high-altitude operation in the existing cable test wiring test, improves the working efficiency of cable wiring test, and enhances the use safety of the cable test wiring system. By adding over-temperature protection to the three-phase output ports, the safety performance during use is improved.

[0033] The above shows and describes the basic features, principles, and advantages of the present utility model. It should be noted that the present utility model is not limited by the above embodiments, but only partial embodiments. Without departing from the spirit and scope of the present utility model, several improvements and supplements made are regarded as the protection scope of the present utility model.

Claims

1. A multifunctional cable test wiring system, characterized in that: include: The wiring tester comprises a main body, a main control module, a switch execution module and a temperature sensing module. The switch execution module comprises a three-phase input terminal, a switch knob and a three-phase output terminal. The three-phase input terminal is connected to the switch knob, the switch knob is connected to the three-phase input terminal, the switch execution module is connected to the main control module; the main control module is connected to the output terminal of the temperature sensing module.

2. A multifunctional cable test wiring system according to claim 1, characterized in that: The main control module includes a switch control unit, a data receiving unit and a data processing unit.

3. A multifunctional cable test wiring system according to claim 1, characterized in that: The temperature sensing module includes a low temperature coefficient oscillator, a first subtraction counter, a second subtraction counter, a slope accumulator, a counting comparator, a high temperature coefficient oscillator and a temperature register; The first subtraction counter is connected to a slope accumulator, a low temperature coefficient oscillator and a temperature register; the slope accumulator is connected to a first subtraction counter and a counting comparator; the counting comparator is connected to the temperature register; the high temperature coefficient oscillator is connected to a second subtraction counter; and the second subtraction counter is connected to the temperature register.

4. A multifunctional cable test wiring system according to claim 3, characterized in that: The temperature sensing module has a temperature measurement range of -45 degrees to 130 degrees.

5. A multifunctional cable test wiring system according to claim 1, characterized in that: The switch knob is provided with an A-phase test knob, a B-phase test knob, a C-phase test knob, a three-phase grounding knob and a three-phase suspension knob.

6. A multifunctional cable test wiring system according to claim 1, characterized in that: The wiring tester body is also provided with cable wiring ports, and the wiring ports are respectively connected to the three-phase input terminals of the switch execution modules.

7. A multifunctional cable test wiring system according to claim 1, characterized in that: An electromagnetic relay is provided between the three-phase input end of the switch execution module and the switch knob, a first electromagnetic relay is provided between the first phase input end and the A phase test knob, a second electromagnetic relay is provided between the second phase input end and the B phase test knob, and a third electromagnetic relay is provided between the third phase input end and the C phase test knob.

8. A multifunctional cable test wiring system according to claim 1, characterized in that: The main control module is also connected to a display module, and the display module is provided with a liquid crystal display screen.

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