阅读说明：本技术 一种长距离导线多接头发热检测装置 (Long distance wire multi-joint detection device that generates heat ) 是由 郑志华 李志宏 高志鹏 姚继荣 张维进 李长杰 朱玉波 张利 刘庆宝 王营书 于 2019-09-27 设计创作，主要内容包括：本发明属于长距离导线接头发热检测技术领域,尤其涉及一种长距离导线多接头发热检测装置。该长距离导线多接头发热检测装置结构简单、性能可靠,可实现一次检测长距离导线上多个接头发热缺陷的技术效果。一种长距离导线多接头发热检测装置,包括有：电源、24脉波有载调压整流变压器、脉冲电容组、三电极气体火花开关、分压电阻器、感温贴片；其中,24脉波有载调压整流变压器的公共绕组与电源相连接,24脉波有载调压整流变压器的调压绕组、三电极气体火花开关的输入极端分别与脉冲电容组相连接；三电极气体火花开关的输出极端与分压电阻器、待检测的长距离导线顺次相连；感温贴片贴设在螺栓短接接头与长距离导线相接连的接触面位置处。(The invention belongs to the technical field of long-distance lead joint heating detection, and particularly relates to a long-distance lead multi-joint heating detection device. The long-distance wire multi-joint heating detection device is simple in structure and reliable in performance, and can achieve the technical effect of detecting the heating defects of a plurality of joints on a long-distance wire at one time. A long-distance lead multi-joint heating detection device comprises: the device comprises a power supply, a 24-pulse on-load voltage regulation rectifier transformer, a pulse capacitor bank, a three-electrode gas spark switch, a voltage division resistor and a temperature sensing patch; the common winding of the 24-pulse on-load voltage-regulating rectifier transformer is connected with a power supply, and the voltage-regulating winding of the 24-pulse on-load voltage-regulating rectifier transformer and the input electrode terminal of the three-electrode gas spark switch are respectively connected with the pulse capacitor bank; the output extreme end of the three-electrode gas spark switch is sequentially connected with the voltage-dividing resistor and the long-distance lead to be detected; the temperature sensing patch is attached to the contact surface position where the bolt short-circuit connector is connected with the long-distance lead.)

1. The utility model provides a long distance wire polylinker detection device that generates heat, be provided with a plurality of bolt short circuit on the long distance wire and connect, its characterized in that, including: the device comprises a power supply, a 24-pulse on-load voltage regulation rectifier transformer, a pulse capacitor bank, a three-electrode gas spark switch, a voltage division resistor and a temperature sensing patch;

The common winding of the 24-pulse on-load voltage-regulating rectifier transformer is connected with a power supply, and the voltage-regulating winding of the 24-pulse on-load voltage-regulating rectifier transformer and the input electrode terminal of the three-electrode gas spark switch are respectively connected with the pulse capacitor bank; the output extreme end of the three-electrode gas spark switch is sequentially connected with the voltage-dividing resistor and the long-distance lead to be detected; the temperature sensing patch is attached to the contact surface position where the bolt short-circuit connector is connected with the long-distance lead.

2. The multi-tap heat detection device for long haul conductors of claim 1, further comprising: a trigger control unit;

The trigger control unit is composed of contactors and relays which are mutually cascaded; the contactor is a direct current contactor with the rated voltage of 24V, a main contact of the contactor is connected with the control end of the three-electrode gas spark switch, and an auxiliary contact of the contactor is controlled by a relay.

3. The long-distance lead multi-joint heating detection device according to claim 1, wherein a silicon stack and a current limiting resistor are further arranged between a voltage regulating winding and a pulse capacitor bank of the 24-pulse on-load voltage regulating rectifier transformer; the resistance of the current limiting resistor is 1k omega.

4. The long-reach lead multi-joint heating detection device of claim 1, wherein the power supply uses 220V/50Hz mains; the direct current voltage output by the voltage regulating winding of the 24-pulse on-load voltage regulating rectifier transformer is not less than 590V, and the output direct current is not more than 16.5X2 kA.

5. The long-reach lead multi-terminal heating detection device of claim 1, wherein said pulse capacitor bank is formed by 4 pulse capacitor units connected in series; the electrical parameter of each pulse capacitor unit is 50Kv/25 muF.

Technical Field

the invention belongs to the technical field of long-distance lead joint heating detection, and particularly relates to a long-distance lead multi-joint heating detection device.

Background

The connector, which is the weakest point in a long distance conductor system, is highly susceptible to improper defects during the use of long distance conductors. The reasons for the generation of the specific defects mainly include the following: 1. improper installation of the joint; 2. the strands of the joint or the conductor are damaged during the construction process, so that the mechanical strength of the contact position of the joint and the conductor is reduced; 3. long-term vibration, metal fatigue, overvoltage, corrosion of acid and alkali salt dust and the like. When a defect occurs, if the defect cannot be found and disposed in time, the contact surface between the long-distance lead and the connector is further heated, and finally, a related contact component is broken down, so that the service life of the long-distance lead is affected. However, the inventor finds that most of the existing multi-joint heating detection equipment for long-distance wires can only realize detection in a use state (namely live working detection), and only one joint in the multi-joint can be detected in one detection process, so that the reliability of a detection structure is poor, the detection efficiency is low, and the difficulty in using the equipment is high.

Disclosure of Invention

the invention provides a long-distance lead multi-joint heating detection device which is simple in structure and reliable in performance and can achieve the technical effect of detecting heating defects of multiple joints on a long-distance lead at one time.

In order to solve the technical problems, the invention adopts the following technical scheme:

The utility model provides a long distance wire polylinker detection device that generates heat, be provided with a plurality of bolt short circuit on the long distance wire and connect, including: the device comprises a power supply, a 24-pulse on-load voltage regulation rectifier transformer, a pulse capacitor bank, a three-electrode gas spark switch, a voltage division resistor and a temperature sensing patch;

The common winding of the 24-pulse on-load voltage-regulating rectifier transformer is connected with a power supply, and the voltage-regulating winding of the 24-pulse on-load voltage-regulating rectifier transformer and the input electrode terminal of the three-electrode gas spark switch are respectively connected with the pulse capacitor bank; the output extreme end of the three-electrode gas spark switch is sequentially connected with the voltage-dividing resistor and the long-distance lead to be detected; the temperature sensing patch is attached to the contact surface position where the bolt short-circuit connector is connected with the long-distance lead.

further, the method also comprises the following steps: a trigger control unit;

The trigger control unit is composed of contactors and relays which are mutually cascaded; the contactor is a direct current contactor with the rated voltage of 24V, a main contact of the contactor is connected with the control end of the three-electrode gas spark switch, and an auxiliary contact of the contactor is controlled by a relay.

Preferably, a silicon stack and a current-limiting resistor are arranged between the voltage-regulating winding and the pulse capacitor bank of the 24-pulse on-load voltage-regulating rectifier transformer; the resistance of the current limiting resistor is 1k omega.

optionally, the power supply adopts 220V/50Hz commercial power; the direct current voltage output by the voltage regulating winding of the 24-pulse on-load voltage regulating rectifier transformer is not less than 590V, and the output direct current is not more than 16.5 multiplied by 2 kA.

Further preferably, the pulse capacitor bank is formed by connecting 4 pulse capacitor units in series; the electrical parameter of each pulse capacitor unit is 50Kv/25 muF.

the invention provides a long-distance lead multi-joint heating detection device, which comprises: the device comprises a power supply, a 24-pulse on-load voltage regulation rectifier transformer, a pulse capacitor bank, a three-electrode gas spark switch, a voltage division resistor, a temperature sensing patch, a trigger control unit and other structural units. The long-distance lead multi-joint heating detection device with the structural characteristics can realize the detection of the heating defects of a plurality of joints on the long-distance lead in one detection process, and has simple structure and reliable performance.

Drawings

FIG. 1 is a schematic circuit diagram of a long-distance multi-joint heating detection device according to the present invention;

Reference numerals: 1. a long-distance wire; 2. a joint; 3. a temperature sensing patch; 4. a contactor; 5. a relay; t: a power source; UA: 24-pulse on-load tap changing rectifier transformers; d: stacking silicon; r0: a current limiting resistor; c: a pulse capacitor bank; k: a three-electrode gas spark switch; r1: a voltage dividing resistor first voltage dividing resistor; r2: a voltage dividing resistor second voltage dividing resistor; GND: and a ground terminal.

Detailed Description

The invention provides a long-distance lead multi-joint heating detection device which is simple in structure and reliable in performance and can achieve the technical effect of detecting heating defects of multiple joints on a long-distance lead at one time.

This kind of long distance wire polylinker detection device that generates heat is provided with a plurality of bolt short circuit joints on the long distance wire, as shown in fig. 1, wherein including: the device comprises a power supply, a 24-pulse on-load voltage regulation rectifier transformer, a pulse capacitor bank, a three-electrode gas spark switch, a voltage division resistor and a temperature sensing patch. Specifically, the power supply adopts 220V/50Hz commercial power; the common winding of the 24-pulse on-load voltage-regulating rectifier transformer is connected with a power supply, and the voltage-regulating winding of the 24-pulse on-load voltage-regulating rectifier transformer is connected with the pulse capacitor bank. Preferably, the direct current voltage output by the voltage regulating winding of the 24-pulse on-load voltage regulating rectifier transformer is not less than 590V, and the output direct current is not more than 16.5 multiplied by 2 kA. The pulse capacitor group is further connected with the input terminal of the three-electrode gas spark switch; the output extreme end of the three-electrode gas spark switch is sequentially connected with the voltage-dividing resistor and the long-distance lead to be detected; the temperature sensing patch is attached to the contact surface position where the bolt short-circuit connector is connected with the long-distance lead.

In order to facilitate understanding of the present invention by those skilled in the art, the operation of the long-distance lead multi-terminal heating detection device will be explained in detail with reference to the accompanying drawings. Firstly, the detection device uses a 24-pulse on-load voltage regulation rectifier transformer to realize voltage regulation and rectification treatment on commercial power provided by a power supply. The voltage regulating range of the 24-pulse on-load voltage regulating rectifier transformer is from 0V to rated voltage, and the full-range uniform regulation in the rated voltage range can be realized; by means of the voltage regulation of the 24-pulse on-load voltage regulation rectifier transformer, the power factor of power supply is improved, and the stable rising and stable falling of subsequent output current are ensured. And then, the direct current output by the voltage regulation and rectification processing of the 24-pulse on-load voltage regulation rectifier transformer is loaded to the pulse capacitor bank, so that the pulse capacitor bank is charged. And then, after the charging is finished, triggering and switching on the three-electrode gas spark switch to realize the discharging process of the pulse capacitor bank. After voltage division is carried out by the voltage division resistor, current generated by discharging of the pulse capacitor group is loaded to a wire to be long-distance (and a plurality of bolt short-circuit joints arranged on the long-distance wire). Under the impact action of the test current, the contact positions of the plurality of short-circuit bolt joints and the long-distance lead generate heating phenomena (generally, the situation that the short-circuit bolt joints generate heat and increase the heat is caused by defects is specially indicated, the heat and the current amplitude are in positive correlation, and the situation that the heat and increase the heat cannot occur when the short-circuit bolt joints do not have defects). At the moment, the heat emitted by the positions of the plurality of short-circuit bolt joints can be detected by the temperature-sensitive patches and finally used for technicians to determine whether the short-circuit bolt joints have defects.

it should be noted that, as shown in fig. 1, as a preferred embodiment of the present invention, the long-distance lead multi-joint heating detection apparatus further includes a trigger control unit. The trigger control unit is composed of contactors and relays which are in cascade connection with each other and is used for realizing trigger control of the three-electrode gas spark switch. Preferably, the contactor is a direct current contactor with the rated voltage of 24V, a main contact of the contactor is connected with the control end of the three-electrode gas spark switch, and an auxiliary contact of the contactor is controlled by a relay. Of course, the technician may further set the trigger control circuit to determine the control timing of the relay (e.g., when the relay is engaged/disengaged, and the length of time the relay is engaged/disengaged, etc.), thereby ultimately achieving precise control of the relay.

As an optional implementation manner of the present invention, a silicon stack and a current-limiting resistor are further disposed between the voltage-regulating winding and the pulse capacitor bank of the 24-pulse on-load voltage-regulating rectifier transformer; the resistance of the current limiting resistor is 1k omega. The pulse capacitor group is formed by connecting 4 pulse capacitor units in series; the electrical parameter of each pulse capacitor unit is 50Kv/25 muF.

Finally, it should be added that those skilled in the art select appropriate temperature sensing patch parameters according to the temperature resistance requirement of the long-distance wire design and the possible temperature range of the joint heating (for example, when the heating temperature of the multi-distance wire is generally not more than 200 ℃, the temperature sensing patch with the metal film coating can be selected to improve the detection accuracy of the joint heating, and when the heating range of the multi-distance wire is determined to be 450 ℃ to 650 ℃, the platinum inductance temperature sensing patch needs to be selected to obtain higher heat and explosion resistance and ensure the reliability of the heating detection device). Then, for further improving the data transmission efficiency of temperature sensing paster, can dispose a micropower wireless RF communication chip for every temperature sensing paster to the produced data of generating heat of the technique personnel collection joint testing process of being convenient for more improves efficiency of software testing.

The invention provides a long-distance lead multi-joint heating detection device, which comprises: the device comprises a power supply, a 24-pulse on-load voltage regulation rectifier transformer, a pulse capacitor bank, a three-electrode gas spark switch, a voltage division resistor, a temperature sensing patch, a trigger control unit and other structural units. The long-distance lead multi-joint heating detection device with the structural characteristics can realize the detection of the heating defects of a plurality of joints on the long-distance lead in one detection process, and has simple structure and reliable performance.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.