CN212083613U - A UV Pulse Sensing Node - Google Patents

Abstract

The utility model discloses an ultraviolet pulse sensing node, which comprises a square shell, a mounting bracket, a sensing bracket and an ultraviolet sensor; a power module, a microprocessor, an A/D acquisition circuit and a wireless communication module are arranged in the square shell. . The ultraviolet pulse sensing node uses the ultraviolet sensor and the A/D acquisition circuit to collect the ultraviolet pulse light signal, so that the number of pulses is analyzed by the microprocessor, and then the intensity of the number of pulses is analyzed to determine the intensity of the discharge, thereby Determine whether there may be a risk of failure; the use of wireless communication module can facilitate the wireless transmission of ultraviolet pulse data out of the switch cabinet, which is convenient for the host computer to monitor the strength of remote discharge.

Description

A UV Pulse Sensing Node

technical field

The utility model relates to a sensing node, in particular to an ultraviolet pulse sensing node.

Background technique

High-voltage switch refers to electrical products that are used for on-off, control or protection in power generation, transmission, distribution, power conversion and consumption of power systems, and the voltage level is 3.6kV ~ 550kV. And grounding switch, high voltage load switch, etc. The high-voltage switchgear is an electrical equipment mainly composed of high-voltage switches, and is equipped with primary equipment such as busbars, insulators, transformers, arresters, grounding switches, and secondary equipment for monitoring, controlling, measuring, adjusting and protecting the primary equipment. Inside a closed metal cabinet. High-voltage switchgear is widely used in every link of the power grid. Its safe operation is directly related to the safety of the entire power grid and the power supply quality of the power system to users. It is one of the most important electrical equipment in the power system.

According to incomplete statistics, many domestic power generation companies and power companies have experienced high-voltage switchgear failures of varying degrees, which have caused certain economic losses. Some of these faults come from the quality problems of the switchgear itself, and the more important reason is the lack of effective monitoring methods for the switchgear at present. The fault detection in the traditional high-voltage switchgear must be carried out in the state of power failure or by manual inspection. The power failure maintenance will not only reduce the availability of equipment and the reliability of user power supply, but also can only be detected periodically. The internal metal components of the switchgear Defects lurking in the manufacturing process or installation and operation are also prone to partial discharge under the action of long-term high voltage, high temperature, humidity, vibration, etc. When partial discharge occurs in the switch cabinet, accompanied by light radiation, there are ultraviolet rays. Light. Therefore, it is very necessary to design an ultraviolet pulse sensing node, which can detect the ultraviolet pulse in the switch cabinet in real time, so as to facilitate the timely detection of possible fault risks.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide an ultraviolet pulse sensing node, which can detect the ultraviolet pulse in the switch cabinet in real time, so as to facilitate the timely discovery of possible fault risks.

Technical scheme: the ultraviolet pulse sensing node of the present utility model includes a square shell, a mounting bracket, a sensing bracket and an ultraviolet sensor;

A power supply module, a microprocessor, an A/D acquisition circuit and a wireless communication module are arranged in the square shell; the mounting bracket includes an insertion rod, a mounting plate, an insulating plate and a length positioning bolt; at the bottom center of the square shell and one of the A fixed installation sleeve is vertically arranged at the center of the vertical side; a locking threaded hole is arranged on the pipe wall at the mouth of the two fixed installation sleeves; the installation plate is fixedly installed in the middle of the insulating plate, The four top corners of the board are provided with fixed installation holes; one end of the insertion rod is inserted into one of the fixed installation sleeves, and the other end is vertically fixed in the middle of the installation board; along the length of the rod wall of the insertion rod A guide chute is provided in the direction; the length positioning bolt is screwed and installed in the locking threaded hole at the mouth of the fixed installation casing where the insertion rod is inserted, and the screw end of the length positioning bolt is pressed against the guide chute. on the bottom of the groove;

The ultraviolet sensor is installed on the top of the square shell through the sensing bracket, and the electrical connection cable of the ultraviolet sensor extends into the square shell; the microprocessor is electrically connected with the output end of the A/D acquisition circuit, and the input end of the A/D acquisition circuit is electrically connected It is electrically connected with the ultraviolet sensor through the electrical connection cable; the power module supplies power to the ultraviolet sensor through the electrical connection cable; the wireless communication module is electrically connected with the microprocessor; the power supply module is the microprocessor, the A/D acquisition circuit and the wireless communication module respectively powered by.

Further, the sensing bracket includes a vertical tube, a U-shaped clamping seat, an extension tube, a locking bolt, a bar-shaped mounting plate, a bar-shaped bending plate, an inner backing plate, a positioning locking nut and a sensor mounting seat; The lower end of the pipe is rotatably installed at the center of the top surface of the square shell; the U-shaped clamping seat is fixedly installed on the upper end of the vertical pipe; a through hole is provided on the clamping plate on one side of the U-shaped clamping seat, The other side of the clamping plate is provided with a locking threaded hole; the screw end of the locking bolt passes through the through hole and is screwed and installed on the locking threaded hole; on both sides of the U-shaped clamping seat, the clamping plate A clamping support is rotatably installed on the opposite inner surface through a rotating pin shaft, and arc-shaped clamping grooves are arranged on the opposite inner surfaces of the two clamping supports; the extension tube is clamped and installed on the two clamping supports. Between the arc-shaped clamping grooves; the middle part of the strip-shaped mounting plate is fixedly installed on the end of the extension pipe; the two ends of the strip-shaped bending plate are fixedly installed on the two ends of the strip-shaped The plate surface of the bent plate is provided with an angle adjustment strip hole along its length direction; the ultraviolet sensor is fixedly installed on the top side of the sensor mounting seat, and a circular arc groove is arranged on the bottom side of the sensor mounting seat; A metal sleeve is arranged in the arc groove, and a positioning locking external thread is arranged on the outer wall of the metal sleeve; one side of the inner backing plate is set as a circular arc convex surface, and the center of the plate surface of the inner backing plate is arranged The through-type is provided with a central circular hole; the metal sleeve passes through the angle adjustment strip hole and the central circular hole in turn, the arc groove is close to the outer surface of the strip bending plate, and the arc convex surface is close to the strip bending plate. The inner plate surface; the positioning locking nut is screwed and installed on the positioning locking external thread, and squeezes the inner backing plate; the electrical connection cable of the ultraviolet sensor runs through the bottom side of the sensor mounting seat, the metal sleeve, the strip The installation plate, extension pipe, U-shaped clamping seat, vertical pipe and square casing enter into the square casing.

Further, a bar-shaped outlet slot is arranged on the tube wall of the extension tube along its length direction; the electrical connection cable in the extension tube extends from the bar-shaped outlet slot and then penetrates the U-shaped clamping seat and enters the vertical tube.

Further, a metal mesh shielding layer is embedded in the pipe walls of the extension pipe and the vertical pipe.

Compared with the prior art, the utility model has the beneficial effects as follows: a fixed installation sleeve is arranged on the bottom and the vertical side respectively, so that the insertion rod can be easily installed on the bottom side or the vertical side of the switch cabinet; The positioning bolt, the fixed installation sleeve and the insertion rod can meet the requirements of axial length adjustment; the guide chute can prevent the relative rotation of the fixed installation sleeve and the insertion rod; the ultraviolet sensor and the A/D acquisition circuit can be used to detect the ultraviolet pulse light. The signal is collected, so that the number of pulses is analyzed by the microprocessor, and then the intensity of the number of pulses is analyzed to judge the strength of the discharge, so as to judge whether there is a risk of failure; the use of the wireless communication module can facilitate the wireless transmission of ultraviolet pulse data. Outside the switch cabinet, it is convenient for the host computer to monitor the discharge intensity remotely.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present utility model;

Fig. 2 is the partial structure schematic diagram of the installation position of the U-shaped clamping seat of the present invention;

3 is a schematic diagram of the installation structure of the extension pipe of the present invention;

4 is a schematic diagram of the end face structure of the extension pipe of the present invention;

FIG. 5 is a schematic diagram of the circuit structure of the present invention.

Detailed ways

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

Example 1:

As shown in FIGS. 1-5 , the ultraviolet pulse sensing node disclosed by the present invention includes: a square shell 1 , a mounting bracket, a sensing bracket and an ultraviolet sensor 25 ;

A power supply module, a microprocessor, an A/D acquisition circuit and a wireless communication module are arranged in the square casing 1; the mounting bracket includes an insertion rod 8, a mounting plate 3, an insulating plate 4 and a length positioning bolt 7; in the square casing A fixed installation sleeve 2 is vertically arranged at the bottom center of 1 and the center of one of the vertical side surfaces; a locking threaded hole 6 is arranged on the pipe wall at the nozzle of the two fixed installation sleeves 2; the installation plate 3 is fixedly installed in the middle of the insulating plate 4, and fixed installation holes 5 are provided at the four top corners of the insulating plate 4; one end of the insertion rod 8 is inserted into one of the fixed installation sleeves 2, and the other end is vertically fixed and installed in The middle part of the installation plate 3; the rod wall of the insertion rod 8 is provided with a guide chute 9 along its length direction; the length positioning bolt 7 is screwed and installed on the fixed installation sleeve 2 nozzle of the insertion rod 8 In the locking threaded hole 6 at the position, and the screw end of the length positioning bolt 7 is pressed on the groove bottom of the guide chute 9;

The ultraviolet sensor 25 is installed on the top of the square shell 1 through the sensing bracket, and the electrical connection cable 20 of the ultraviolet sensor 25 extends into the square shell 1; the microprocessor is electrically connected to the output end of the A/D acquisition circuit, and the A/D D The input end of the acquisition circuit is electrically connected with the ultraviolet sensor 25 through the electrical connection cable 20; the power supply module supplies power to the ultraviolet sensor 25 through the electrical connection cable 20; the wireless communication module is electrically connected with the microprocessor; the power supply modules are respectively the microprocessors , A/D acquisition circuit and wireless communication module power supply.

A fixed installation sleeve 2 is arranged on the bottom and the vertical side respectively, so that the insertion rod 8 can be easily installed on the bottom side or the vertical side of the switch cabinet; the positioning bolt 7, the fixed installation sleeve 2 and the insertion rod are used. 8 can meet the requirements of axial length adjustment; the guide chute 9 can be used to prevent the relative rotation of the fixed installation sleeve 2 and the insertion rod 8; the ultraviolet sensor 25 and the A/D acquisition circuit can be used to collect the ultraviolet pulse light signal, so that the The microprocessor analyzes the number of pulses, and then analyzes the intensity of the number of pulses to determine the strength of the discharge, so as to determine whether there may be a risk of failure; using the wireless communication module can easily send the ultraviolet pulse data out of the switch cabinet wirelessly, which is convenient for the upper position. The remote monitoring of the discharge strength is carried out by the machine.

Further, the sensing bracket includes a vertical tube 14, a U-shaped clamping seat 15, an extension tube 19, a locking bolt 16, a bar-shaped mounting plate 22, a bar-shaped bending plate 23, an inner backing plate 11, and a positioning locking nut 12 and the sensor mounting seat 24; the lower end of the vertical pipe 14 is rotatably installed at the center of the top surface of the square shell 1; the U-shaped clamping seat 15 is fixedly installed on the upper end of the vertical pipe 14; One side clamping plate of the seat 15 is provided with a through hole, and the other side clamping plate is provided with a locking threaded hole; the screw end of the locking bolt 16 passes through the through hole and is screwed and installed in the locking threaded hole A clamping support 17 is rotatably installed on the opposite inner sides of the clamping plates on both sides of the U-shaped clamping base 15 through the rotating pin 21, and a clamping support 17 is installed on the opposite inner sides of the two clamping supports 17. An arc-shaped clamping groove 18 is provided on the upper part; the extension pipe 19 is clamped and installed between the two arc-shaped clamping grooves 18; the middle part of the strip-shaped mounting plate 22 is fixedly installed on the end of the extension pipe 19; The two ends of the curved bending plate 23 are respectively fixed and installed on both ends of the strip-shaped mounting plate 22, and an angle adjustment strip-shaped hole is arranged on the plate surface of the strip-shaped bending plate 23 along its length direction; the ultraviolet sensor 25 is fixed It is installed on the top side of the sensor mounting seat 24, and is provided with an arc groove 10 on the bottom side of the sensor mounting seat 24; The outer wall is provided with a positioning and locking external thread; the side plate surface of the inner backing plate 11 is set as a circular arc convex surface, and a central circular hole is arranged through the center of the plate surface of the inner backing plate 11; the metal sleeve 13 is successively penetrated The angle adjustment strip hole and the central circular hole, the arc groove 10 is close to the outer surface of the strip bending plate 23, and the arc convex surface is close to the inner surface of the strip bending plate 23; the positioning lock nut 12 is threaded It is screwed and installed on the positioning locking external thread, and squeezes the inner backing plate 11; the electrical connection cable 20 of the ultraviolet sensor 25 sequentially penetrates the bottom side of the sensor mounting seat 24, the metal sleeve 13, and the strip-shaped mounting plate 22. , the extension pipe 19 , the U-shaped clamping seat 15 , the vertical pipe 14 and the square casing 1 enter the square casing 1 . The sensor mounting head structure formed by the strip-shaped mounting plate 22, the strip-shaped bending plate 23, the inner backing plate 11, the metal sleeve 13, the positioning lock nut 12 and the sensor mounting seat 24 can facilitate the detection of the ultraviolet sensor 25. Adjusting the orientation angle is convenient for aligning the device to be detected in the switch cabinet; the clamping position and swing height of the extension pipe 19 can be easily adjusted by using two rotatably mounted clamping supports 17 .

Further, a bar-shaped outlet slot 27 is provided on the tube wall of the extension tube 19 along its length direction; the electrical connection cable 20 in the extension tube 19 protrudes from the bar-shaped outlet slot 27 and passes through the U-shaped clamp. The seat 15 enters the vertical pipe 14 . The use of the bar-shaped outlet slot 27 can facilitate the outlet of the electrical connection cable 20 , and when the extension tube 19 adjusts the clamping position, the electrical connection cable 20 can also be outlet from the U-shaped clamping seat 15 .

Further, a metal mesh shielding layer 28 is embedded in the pipe walls of the extension pipe 19 and the vertical pipe 14 . Using the metal mesh shielding layer 28 can shield the electrical connection cable 20 passing through it from interference, so as to ensure the stability and reliability of the sensing signal.

In the ultraviolet pulse sensing node disclosed by the utility model, the microprocessor is composed of an existing microcontroller and its peripheral circuits, and the microcontroller adopts a microcontroller based on 16/32-bit ARM7 TDMI-S, which automatically With 128kB is the on-chip Flash memory, enough to accommodate the full version of the protocol stack, no need to expand the memory; the wireless communication module includes an antenna and a radio frequency front-end transceiver composed of a chip CC2591, which integrates the power amplifier for transmitting and receiving. The low-noise amplifier adopts IEEE802.15.4 communication protocol standard, which can automatically form a network, the working frequency band is 2405MHz ~ 2480MHz, the data transmission rate is 250Kbps, the communication range is 300 ~ 450 meters, high performance, low power consumption and low cost, a separate The network can accommodate up to 30 nodes; the ultraviolet sensor 25 adopts the existing ultraviolet photosensitive tube, which is used to sense the ultraviolet light generated by partial discharge in the switch cabinet, output the pulse signal by the photoelectric effect, and then collect the pulse signal by the A/D acquisition circuit. The microprocessor compares the collected pulse signal with the preset threshold to obtain the number of pulses, so as to analyze the intensity of the pulse number to judge the strength of partial discharge; the A/D acquisition circuit adopts the existing acquisition circuit, which is composed of The A/D acquisition chip and its peripheral circuits are composed; the power supply module adopts the existing voltage regulator circuit, which is used to supply power for the microprocessor, the wireless communication module, the ultraviolet sensor 25 and the A/D acquisition circuit respectively.

When the ultraviolet pulse sensing node disclosed by the present invention is installed and used, according to the internal installation environment of the switch cabinet, the insulating plate 4 is selected to be installed on the vertical inner wall or the bottom inner wall of the switch cabinet; The corresponding fixed installation sleeve 2 is locked and fixed by the positioning bolt 7; after the insertion rod 8 is fixed, the axial clamping position of the extension tube 19 is adjusted according to the position of the device to be detected, and then the extension tube is adjusted. The end of 19 is raised to a height, and then the locking bolt 16 is rotated to use the two clamping supports 17 to fix the extension tube 19; then the positioning locking nut 12 is loosened, and the orientation angle of the ultraviolet sensor 25 is adjusted to point to the device to be tested, and then Tighten the positioning lock nut 12 for positioning; after the power supply module is powered, the microprocessor collects the sensing data of the ultraviolet sensor 25 through the A/D acquisition circuit, and the microprocessor compares the collected pulse signal with the preset threshold to obtain The number of pulses, so as to analyze the intensity of the number of pulses to determine the intensity of partial discharge, and then use the wireless communication module to network and upload the collected data to the host computer, which is convenient for the host computer to monitor the discharge intensity remotely.

As mentioned above, although the present invention has been shown and described with reference to certain preferred embodiments, this should not be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims (4)

1. An ultraviolet pulse sensing node, comprising: comprises a square shell (1), a mounting bracket, a sensing bracket and an ultraviolet sensor (25);

a power module, a microprocessor, an A/D acquisition circuit and a wireless communication module are arranged in the square shell (1); the mounting bracket comprises an insertion rod (8), a mounting plate (3), an insulating plate (4) and a length positioning bolt (7); a fixed mounting sleeve (2) is vertically arranged at the center of the bottom of the square shell (1) and the center of one vertical side; the pipe wall at the pipe orifice of the two fixedly installed sleeves (2) is provided with a locking threaded hole (6); the mounting plate (3) is fixedly arranged in the middle of the insulating plate (4), and the four top corners of the insulating plate (4) are provided with fixed mounting holes (5); one end of the plug-in rod (8) is inserted into one of the fixed mounting sleeves (2), and the other end is vertically and fixedly mounted in the middle of the mounting plate (3); a guide sliding chute (9) is arranged on the rod wall of the insertion rod (8) along the length direction; the length positioning bolt (7) is screwed in a locking threaded hole (6) at the pipe orifice of the fixed mounting sleeve (2) inserted with the insertion rod (8), and the end part of the screw rod of the length positioning bolt (7) is pressed on the bottom of the guide chute (9);

the ultraviolet sensor (25) is installed on the top of the square shell (1) through a sensing bracket, and an electric connection cable (20) of the ultraviolet sensor (25) extends into the square shell (1); the microprocessor is electrically connected with the output end of the A/D acquisition circuit, and the input end of the A/D acquisition circuit is electrically connected with the ultraviolet sensor (25) through an electric connection cable (20); the power supply module supplies power to the ultraviolet sensor (25) through the electric connection cable (20); the wireless communication module is electrically connected with the microprocessor; the power module supplies power for the microprocessor, the A/D acquisition circuit and the wireless communication module respectively.

2. The ultraviolet pulse sensing node of claim 1, wherein: the sensing support comprises a vertical pipe (14), a U-shaped clamping seat (15), an extension pipe (19), a locking bolt (16), a strip-shaped mounting plate (22), a strip-shaped bending plate (23), an inner side base plate (11), a positioning locking nut (12) and a sensor mounting seat (24); the lower end of the vertical pipe (14) is rotatably arranged at the center of the top surface of the square shell (1); the U-shaped clamping seat (15) is fixedly arranged on the upper end part of the vertical pipe (14); a through hole is formed in the clamping plate on one side of the U-shaped clamping seat (15), and a locking threaded hole is formed in the clamping plate on the other side; the end part of a screw rod of the locking bolt (16) passes through the through hole and then is screwed on the locking threaded hole; the opposite inner side surfaces of the clamping plates on the two sides of the U-shaped clamping seat (15) are respectively and rotatably provided with a clamping support (17) through a rotating pin shaft (21), and the opposite inner side surfaces of the two clamping supports (17) are respectively provided with an arc-shaped clamping groove (18); the extension pipe (19) is clamped and installed between the two arc-shaped clamping grooves (18); the middle part of the strip-shaped mounting plate (22) is fixedly arranged on the end part of the extension pipe (19); two ends of the strip-shaped bending plate (23) are respectively and fixedly arranged on two ends of the strip-shaped mounting plate (22), and an angle adjusting strip-shaped hole is formed in the plate surface of the strip-shaped bending plate (23) along the length direction of the plate surface; the ultraviolet sensor (25) is fixedly arranged on the top side surface of the sensor mounting seat (24), and an arc groove (10) is arranged on the bottom side surface of the sensor mounting seat (24); a metal sleeve (13) is arranged in the arc groove (10), and a positioning locking external thread is arranged on the outer wall of the metal sleeve (13); one side plate surface of the inner side backing plate (11) is provided with an arc convex surface, and a center round hole is arranged in the center of the plate surface of the inner side backing plate (11) in a penetrating manner; the metal sleeve (13) penetrates through the angle adjusting strip-shaped hole and the central circular hole in sequence, the arc groove (10) is attached to the outer side plate surface of the strip-shaped bending plate (23), and the arc convex surface is attached to the inner side plate surface of the strip-shaped bending plate (23); the positioning locking nut (12) is screwed on the positioning locking external thread and extrudes the inner side backing plate (11); an electric connection cable (20) of the ultraviolet sensor (25) penetrates through the bottom side face of the sensor mounting seat (24), the metal sleeve (13), the strip-shaped mounting plate (22), the extension pipe (19), the U-shaped clamping seat (15), the vertical pipe (14) and the square shell (1) in sequence and then enters the square shell (1).

3. The ultraviolet pulse sensing node of claim 2, wherein: a strip-shaped outlet notch (27) is arranged on the pipe wall of the extension pipe (19) along the length direction; an electric connection cable (20) in the extension pipe (19) extends out of the strip-shaped wire outlet notch (27) and then penetrates through the U-shaped clamping seat (15) to enter the vertical pipe (14).

4. The ultraviolet pulse sensing node of claim 2, wherein: and metal mesh shielding layers (28) are embedded into the pipe walls of the extension pipe (19) and the vertical pipe (14).

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