CN105372457B - A kind of capacitance type equipment live detection end shield sampler - Google Patents

Abstract

The invention belongs to the technical field of live detection of capacitive equipment, and in particular relates to a sampling device for the last screen of the live detection of capacitive equipment, which is a sampling device for the last screen signal of the charged detection of the insulation state of the capacitive equipment. It includes an upper rotating mechanism, a middle rotating wiring mechanism and a bottom fixing mechanism. The rotating mechanism is connected to the rotating wiring mechanism, and the lower part of the rotating wiring mechanism is connected to the fixing mechanism. The rotating mechanism includes: a sealing cover, a detection joint and a detection core; wherein the sealing cover; the sealing cover; the cover is on the detection joint, and the detection core is connected to the detection joint. It has been proved by retrieval that there is no relevant report on the sampling device of the last screen of the charged detection of capacitive equipment. Through the implementation of the technical solution of the invention, the live detection of the insulation parameters of the capacitive equipment can be realized, thereby effectively obtaining the insulation state of the capacitive equipment under the operating voltage, and ensuring the safe and stable operation of the equipment.

Description

A capacitive equipment live detection final screen sampling device

technical field

The invention belongs to the technical field of live detection of capacitive equipment, and in particular relates to a sampling device for the last screen of the live detection of the capacitive equipment, which is a sampling device for the last screen signal of the charged detection of the insulation state of the capacitive equipment.

Background technique

In high-voltage electrical equipment, most of the equipment is capacitive insulation equipment. For high-voltage capacitive equipment, through the inspection of its insulation performance, equipment defects that are still in the early development stage can be found. In order to detect the insulation parameters of capacitive equipment, it is generally necessary to extract the leakage current signal of the equipment, that is, the current signal on the grounding wire of the end screen of the equipment.

At present, live detection technology has been widely used in the detection of various equipment in substations. However, since the end screen of capacitive equipment needs to be reliably grounded during operation, and the grounding point of the end screen is often set high, the safety distance is insufficient, which leads to the inability to carry out the live detection work of the insulation state of capacitive equipment smoothly. For the insulation state of capacitive equipment, the power sector still adopts the mode of power outage maintenance, which is very inefficient.

In view of the current limitations of live detection of insulation parameters of capacitive equipment, it is necessary to design a sampling device for the last screen of live detection of capacitive equipment, which can not only ensure the safety of equipment and personal safety, but also detect the insulation state of capacitive equipment.

Contents of the invention

Aiming at the above problems, the present invention provides a sampling device for the last screen of the charged detection of capacitive equipment. The purpose is to provide a sampling device that adopts an integrated design and can lead the grounding point of the end screen of the capacitive equipment to the bottom of the equipment through the form of a lead-out line, so as to facilitate the operation of the test personnel. During the normal operation of the equipment, the device can ensure the reliable grounding of the final screen. When carrying out the live detection test, by screwing in a live detection sampling unit on the integrated design device, the connection between the last screen and the ground can be automatically disconnected, and the lead wire of the last screen is connected to the measurement unit to complete the capacitance type test. Sampling of device leakage current. The device adopts grounding protection measures to prevent the open circuit of the end screen caused by various operations and ensure the safe and stable operation of the equipment.

The technical solution adopted by the present invention to solve its technical problems is:

A capacitive equipment live detection terminal screen sampling device, including an upper rotating mechanism, a middle rotating wiring mechanism and a bottom fixing mechanism, the rotating mechanism is connected to the rotating wiring mechanism, and the lower part of the rotating wiring mechanism is connected to the fixing mechanism.

The rotating mechanism includes: a sealing cover, a detection joint and a detection core; wherein the sealing cover is covered on the detection joint, and the detection core is connected to the detection joint.

The rotary wiring mechanism includes: an insulating guide sleeve, a sliding contact, a grounding cover, a return spring and a soft wire; wherein the sliding contact is connected to the conductive column through a soft wire, and is used to contact the detection core. By compressing the return spring, The electrical connection between the ground cover and the conductive column is completed; the ground cover is connected to the ground through the shell, and the return spring is arranged between the sliding contact and the conductive column.

The fixing mechanism includes: conductive posts, terminal posts, insulators, lead wires of the last screen, leads, insulating supports, bases and grounding wires; wherein the lead wires of the last screen are connected to the conductive posts through the terminal posts and wires; the insulators serve as The function of insulating support prevents the terminal from connecting with the base; the insulating support supports the conductive column and insulates it from the base; the insulating support is set at the bottom of the conductive column and connects with the base to support the conductive column; the base The base is located at the bottom of the equipment and connected to the ground wire through bolts; the insulator is located between the base and the terminal.

The terminal is connected to the end screen of the capacitive equipment through the lead wire of the end screen, and the shell is connected to the grounding copper bar.

The present invention has the following innovative points:

(1) The device is installed at the bottom of the capacitive equipment, and the grounding point of the end screen of the capacitive equipment can be led to the inside of the device, which is convenient for the on-site personnel to carry out live detection of the insulation parameters of the capacitive equipment;

(2) The device adopts a rotary wiring mechanism, which can effectively prevent errors caused by complex wiring on site and is easy to use on site;

(3) There is a grounding protection device inside, that is, when the device is not connected to the measurement unit, it can ensure the reliable grounding of the last screen and prevent equipment failure caused by the open circuit of the grounding wire of the last screen.

Advantage and effect of the present invention are:

It has been proved by retrieval that there is no relevant report on the sampling device of the last screen of the live detection of capacitive equipment. Through the implementation of the technical scheme of the invention, the live detection of the insulation parameters of the capacitive equipment can be realized, thereby effectively obtaining the insulation state of the capacitive equipment under the operating voltage, and ensuring the safe and stable operation of the equipment.

The present invention will be described in detail below in conjunction with specific embodiments of the present invention and accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of the external structure of the present invention;

Fig. 2 is the cross-sectional structure schematic diagram of the present invention before charged detection;

Fig. 3 is a schematic cross-sectional structure diagram of the detection mechanism starting to rotate during the electrification detection of the present invention;

Fig. 4 is a schematic cross-sectional structure diagram of the detection mechanism rotating in place during the electrification detection of the present invention.

In the figure: sealing cover 1, insulating guide sleeve 2, sliding contact 3, grounding cover 4, return spring 5, conductive post 6, insulating support 7, base 8, terminal post 9, insulator 10, detection joint 11, detection core 12, the lead wire 13 of the last screen, the ground wire 14, the wire 15, and the soft wire 16.

Detailed ways

The present invention is a capacitive equipment live detection final screen sampling device, which includes an upper rotating mechanism, a middle rotating wiring mechanism and a bottom fixing mechanism. The rotating mechanism is connected to the rotating wiring mechanism, and the lower part of the rotating wiring mechanism is connected and fixed. mechanism.

The rotating mechanism includes: a sealing cover 1 , a detection joint 11 and a detection core 12 . Wherein the sealing cover 1 is used for sealing the equipment when not in detection. The sealing cover 1 can be covered on the detection joint 11, and the detection core 12 is connected to the detection joint 11. When performing detection, a detection joint 11 with a detection core 12 is used.

The rotary wiring mechanism includes: insulating guide sleeve 2 , sliding contact 3 , ground cover 4 , return spring 5 and flexible wire 16 . The sliding contact 3 is connected to the conductive column 6 through a flexible wire 16 and used to contact the detection core 12 , and the electrical connection between the ground cover 4 and the conductive column 6 is completed by compressing the return spring 5 . The ground cover 4 is connected to the ground through the housing, and the return spring 5 is arranged between the sliding contact 3 and the conductive column 6 .

The fixing mechanism includes: conductive posts 6 , terminal posts 9 , insulators 10 , lead wires 13 from the last screen, wires 15 , insulating supports 7 , bases 8 and grounding wires 14 . The lead-out line 13 of the last screen is connected with the conductive post 6 through the terminal post 9 and the wire 15 . The insulator 10 acts as an insulating support to prevent the terminal post 9 from being connected to the base 8 . The insulating support 7 functions to support the conductive column 6 and insulate it from the base 8 . The insulating support 7 is arranged at the bottom of the conductive column 6 and connected with the base 8 to support the conductive column 6 . The base 8 is located at the bottom of the equipment, and is connected to the ground wire 14 through bolts to ensure reliable grounding of the housing. The insulator 10 is arranged between the base 8 and the terminal 9 to insulate and support the terminal 9 .

The capacitive equipment live detection terminal screen sampling device of the present invention is installed on the bottom of the capacitive equipment, adopts an integrated design, the terminal 9 is connected to the signal line of the final screen of the capacitive equipment, the ground point of the shell is connected to the ground copper bar of the capacitive equipment, and the middle of the device is Rotary wiring mechanism. During implementation, the grounding point of the capacitive final screen can be led to the bottom of the equipment through the form of lead-out wires, which is convenient for the operation of the test personnel. During the normal operation of the equipment, the device can ensure the reliable grounding of the final screen. When carrying out the live detection test, by screwing in a live detection sampling unit on the integrated design sensor, the connection between the last screen and the ground can be automatically disconnected, and the lead wire 13 of the last screen is connected to the measurement unit to complete the capacitance test. Type equipment leakage current sampling. The grounding protection device is used in the sensor to prevent the open circuit of the end screen caused by various operations and ensure the safe and stable operation of the equipment.

As shown in Figure 1, the device is installed at the bottom of the capacitive equipment, the terminal 9 is connected to the end screen of the capacitive equipment through the lead wire 13 of the end screen, and the shell is connected to the grounding copper bar to ensure good grounding.

As shown in FIG. 2 , the sliding contact 3 is also connected to the conductive column 6 through a soft wire 16 , and the conductive column 6 is connected to the lead wire 13 of the last screen through a wire 15 . The ground cover 4 is connected to the ground through the casing.

When the electrification detection is not performed, the sealing cover 1 is screwed on the rotating mechanism of the device. Under the action of the return spring 5, the sliding contact 3 is in contact with the ground cover 4, so that the end screen of the capacitive device is reliably connected to the ground.

When it is necessary to perform electrification detection, the sealing cover 1 is unscrewed, and the detection joint 11 is screwed on the rotating mechanism. The detection core 12 of the detection joint is connected with the measuring unit of the detection instrument, and the shell of the detection joint 11 is connected with the shell of the detection instrument. As shown in Figure 3, when the detection joint 11 is just screwed on the rotating mechanism, the detection core 12 is connected with the sliding contact 3, so that the detection core 12 is connected with the conductive column 6 and the end screen; the shell of the detection joint 11 is connected with the device shell, which is connected to ground. At this time, due to the effect of the return spring 5, the sliding contact 3 is connected to the ground cover 4, that is, the end screen, the detection core 12 and the ground are all in a connected state.

Continue to screw down the detection joint 11, the detection core 12 will push the sliding contact 3 downward, the return spring 5 will be compressed, and the sliding contact 3 will be separated from the ground cover 4. The sliding contact 3 and the detection core 12 are connected, and the casing of the detection joint 11 is connected to the casing of the device and the ground, so that the connection between the final screen and the ground is opened, and the measurement circuit is connected between the final screen and the ground to realize the sampling of the current of the final screen ,As shown in Figure 4. The device has completed the sampling of the current signal of the live detection of the capacitive equipment.

After the charged detection is finished, unscrew the detection joint 11, and the reset spring 5 of the device connects the sliding contact 3 with the grounding cover 4, ensuring reliable grounding of the final screen.

Claims (3)

1. a kind of capacitance type equipment live detection end shield sampler, it is characterized in that：Rotating mechanism including top, the rotation at middle part Rotatable wiring mechanism and the fixed mechanism of bottom are to connect rotary wiring mechanism, rotary wiring mechanism by rotating mechanism Lower part connects fixed mechanism；

The rotating mechanism includes：Sealing cover（1）, detection tabs（11）With detection core（12）；Wherein sealing cover（1）Gai Jian Survey connector（11）On, detection tabs（11）Upper connecting detection core（12）；

The rotary wiring mechanism includes：Insulative guide sleeves（2）, sliding contact（3）, ground connection lid（4）, resetting spring（5）With Flexible circuit conductor（16）；Wherein sliding contact（3）Pass through flexible circuit conductor（16）With conductive column（6）Connection, and for detecting core（12）It connects It touches, passes through compression reseting spring（5）, complete ground connection lid（4）With conductive column（6）Electrical connection；Ground connection lid（4）By housing with Ground is attached, resetting spring（5）It is located at sliding contact（3）With conductive column（6）Between.

2. a kind of capacitance type equipment live detection end shield sampler according to claim 1, it is characterized in that：Described consolidates Determine mechanism to include：Conductive column（6）, binding post（9）, insulator（10）, end shield lead-out wire（13）, conducting wire（15）, insulating supporting （7）, pedestal（8）And ground wire（14）；Wherein end shield lead-out wire（13）Pass through binding post（9）And conducting wire（15）With conductive column（6） It is connected；Insulator（10）Play the role of insulating supporting, prevent binding post（9）With pedestal（8）It is connected；Insulating supporting（7）It rises To support conductive column（6）And make itself and pedestal（8）Insulation；Insulating supporting（7）It is located at conductive column（6）Bottom, with pedestal（8）Even It connects, plays support conductive column（6）Effect；Pedestal（8）Device bottom is located at, passes through bolt and ground wire（14）Connection；Insulation Son（10）It is located at pedestal（8）With binding post（9）Between.

3. a kind of capacitance type equipment live detection end shield sampler according to claim 2, it is characterized in that：Described connects Terminal（9）Pass through end shield lead-out wire（13）It is connected with capacitance type equipment end shield, housing is connect with grounding copper bar.