CN212083612U

CN212083612U - Switch cabinet partial discharge monitoring system

Info

Publication number: CN212083612U
Application number: CN202020447657.3U
Authority: CN
Inventors: 杭其林; 倪国林
Original assignee: Nanjing Ximusheng Technology Co ltd
Current assignee: Nanjing Ximusheng Technology Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-12-04
Anticipated expiration: 2030-03-31

Abstract

The utility model discloses a cubical switchboard partial discharge monitoring system, including square casing, fixed mounting support, sensor installing support, humiture branch support, ultraviolet branch support, infrared temperature sensor, air humidity sensor and ultraviolet sensor. The switch cabinet partial discharge monitoring system can install the insulation board on the vertical inner wall or the bottom inner wall of the switch cabinet according to the field installation requirement through the fixed installation support; the detection requirements of the temperature and the environment humidity of a device to be detected in the switch cabinet can be met by utilizing the infrared temperature sensor and the air humidity sensor; the ultraviolet pulse light signals can be collected by using an ultraviolet sensor and an A/D (analog/digital) collection circuit, so that the discharge strength is judged; utilize wireless communication module can be convenient for send out the cubical switchboard with the temperature data, humidity data and the ultraviolet pulse data wireless of gathering outside, the host computer of being convenient for carries out the remote monitoring of temperature, humidity and discharge intensity.

Description

Switch cabinet partial discharge monitoring system

Technical Field

The utility model relates to a cubical switchboard monitoring system, especially a cubical switchboard partial discharge monitoring system.

Background

The high-voltage switch is an electrical appliance product which is used for power generation, power transmission, power distribution, electric energy conversion and consumption of a power system and plays roles of on-off, control or protection and the like, has a voltage grade of 3.6 kV-550 kV, and mainly comprises a high-voltage circuit breaker, a high-voltage isolating switch, a grounding switch, a high-voltage load switch and the like. The high-voltage switch cabinet is an electrical device mainly comprising a high-voltage switch, and primary devices such as a bus, an insulator, a mutual inductor, a lightning arrester and a grounding switch and secondary devices for monitoring, controlling, measuring, adjusting and protecting the primary devices are assembled in a closed metal cabinet body. The high-voltage switch cabinet is widely applied to each link of a power grid, the safe operation of the high-voltage switch cabinet is directly related to the safety of the whole power grid and the power supply quality of a power system to users, and the high-voltage switch cabinet 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 high-voltage switch cabinet faults of different degrees, and certain economic loss is caused. These faults, partly due to quality problems of the switchgear itself, are more important due to the lack of effective monitoring means for the switchgear at present. The traditional fault detection in the high-voltage switch cabinet needs to be carried out in a power failure state or a manual inspection mode is adopted, the power failure maintenance not only causes the reduction of the equipment availability and the power supply reliability of users, but also can only carry out periodic detection, the defect that metal components in the switch cabinet are hidden in the manufacturing process or the installation and operation is that partial discharge is easily caused under the action of long-term high voltage, high temperature, humidity, vibration and the like, and when the partial discharge occurs in the switch cabinet, ultraviolet light exists along with the radiation of light. In addition, the switch cabinet is used as a closed device, if the device in the cabinet is abnormal, the device is difficult to be found even if an operator regularly visits, and the requirement for timely mastering the defects of the device is difficult to achieve. Therefore, it is very necessary to design a partial discharge monitoring system for a switch cabinet, which can detect the temperature, humidity and ultraviolet pulse in the switch cabinet in real time, so as to find out possible fault risks in time.

Disclosure of Invention

Utility model purpose: the utility model provides a cubical switchboard partial discharge monitoring system can carry out real-time detection to temperature, humidity and ultraviolet pulse in the cubical switchboard to be convenient for in time discover the trouble risk that probably exists.

The technical scheme is as follows: the utility model discloses a switch cabinet partial discharge monitoring system, including square casing, fixed mounting bracket, sensor installing support, humiture branch support, ultraviolet branch support, infrared temperature sensor, air humidity transducer and ultraviolet sensor;

a power module, a microprocessor, an A/D acquisition circuit and a wireless communication module are arranged in the square shell; the fixed mounting bracket comprises a supporting rod, a mounting plate, an insulating plate, a locking pressure spring, a locking ring sheet and two bracket hinged plates; the two support hinged plates are vertically and parallelly arranged on one vertical side surface of the square shell; one end of the supporting rod is hinged between the two support hinged plates in a swinging way through a swinging rotating shaft, and the other end of the supporting rod is vertically and fixedly arranged on the mounting plate; the vertical side edges of the two support hinged plates are respectively provided with an upper side limiting notch, and the lower side edges of the two support hinged plates are respectively provided with a lower side limiting notch; the locking ring piece is arranged on the support rod in a sliding way, and two limiting lugs are arranged on the ring surface of the locking ring piece; the locking pressure spring is sleeved on the support rod, and a support convex ring is arranged on the support rod; the locking compression spring is elastically supported between the locking ring sheet and the supporting convex ring; when the supporting rod swings to the vertical direction, the two limiting lugs are respectively embedded into the two lower limiting notches; when the supporting rod swings to the transverse direction, the two limiting lugs are respectively embedded into the two upper limiting notches; the mounting plate is fixedly mounted in the middle of the insulating plate, and fixed mounting holes are formed in the four top corners of the insulating plate;

the temperature and humidity branch bracket and the ultraviolet branch bracket can be detachably arranged on the sensor mounting bracket; the infrared temperature sensor and the air humidity sensor are arranged on the temperature and humidity branch bracket, and first electric connection cables of the infrared temperature sensor and the air humidity sensor extend into the square shell; the ultraviolet sensor is arranged on the ultraviolet sensing bracket, and a second electric connection cable of the ultraviolet sensor extends into the square shell; the microprocessor is electrically connected with the infrared temperature sensor and the air humidity sensor through a first electric connection cable; 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 through a second electric connection cable; the power supply module supplies power to the infrared temperature sensor and the air humidity sensor through a first electric connection cable respectively, and supplies power to the ultraviolet sensor through a second electric connection cable; 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.

Further, the fixed mounting bracket comprises a vertical pipe, two U-shaped clamping seats, two locking bolts and a side square pipe; the lower end of the vertical pipe is rotatably arranged at the center of the top surface of the square shell; one end of the side square tube is vertically and fixedly arranged on the vertical tube, and a short tube is rotatably arranged at the upper part of the other end of the side square tube; the two U-shaped clamping seats are respectively and fixedly arranged on the upper end part of the vertical pipe and the upper end part of the short pipe; a through hole is formed in the clamping plate on one side of the U-shaped clamping seat, and a locking threaded hole is formed in the clamping plate on the other side of the U-shaped clamping seat; the end part of the screw rod of the locking bolt passes through the through hole and then is installed on the locking threaded hole in a threaded manner; the clamping device comprises a U-shaped clamping seat, clamping plates, a rotating pin shaft and a rotating pin shaft, wherein the two opposite inner side surfaces of the clamping plates on the two sides of; the temperature and humidity branch support is clamped on two clamping supports of a U-shaped clamping seat at the upper end part of the vertical pipe; the ultraviolet branch bracket is clamped on two clamping supports of the U-shaped clamping seat at the upper end part of the short pipe.

Furthermore, the temperature and humidity branch support comprises an extension pipe, a positioning bolt and a sensor mounting seat; the extension pipe is clamped and installed between the two arc-shaped clamping grooves; the end part of the extension pipe is provided with a hinged notch; a hinge seat is arranged on the sensor mounting seat and is mounted on the hinge notch in a hinge mode through a positioning bolt; the infrared temperature sensor and the air humidity sensor are both arranged on the sensor mounting seat; the first electric connection cables of the infrared temperature sensor and the air humidity sensor sequentially penetrate through the sensor mounting seat, the hinge seat, the extension pipe, the U-shaped clamping seat, the vertical pipe and the square shell and then enter the square shell.

Further, a strip-shaped wire outlet notch is formed in the pipe wall of the extension pipe along the length direction of the extension pipe; a first electric connection cable in the extension pipe extends out of the strip-shaped wire outlet groove and then penetrates through the U-shaped clamping seat to enter the vertical pipe; and metal mesh shielding layers are embedded into the pipe walls of the extension pipe and the vertical pipe.

Further, the ultraviolet branch support comprises an adjusting pipe, a strip-shaped mounting plate, a strip-shaped bending plate, an inner side base plate, a positioning locking nut and a sensor fixing seat; the adjusting pipe is clamped and installed between the two arc-shaped clamping grooves; the middle part of the strip-shaped mounting plate is fixedly arranged on the end part of the adjusting pipe; two ends of the strip-shaped bending plate are respectively and fixedly arranged on two ends of the strip-shaped mounting plate, and an angle adjusting strip-shaped hole is formed in the plate surface of the strip-shaped bending plate along the length direction of the plate surface; the ultraviolet sensor is fixedly arranged on the side surface of the top of the sensor fixing seat, and an arc groove is arranged on the side surface of the bottom of the sensor fixing 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 plate surface of the inner backing plate is provided with an arc convex surface, and a center round hole is arranged in the center of the plate surface of the inner backing plate in a penetrating manner; the metal sleeve sequentially penetrates through the angle adjusting strip-shaped hole and the central circular hole, the arc groove is tightly attached to the outer side plate surface of the strip-shaped bending plate, and the arc convex surface is tightly attached to the inner side plate surface of the strip-shaped bending plate; the positioning locking nut is screwed on the positioning locking external thread and extrudes the inner backing plate; a second electric connection cable of the ultraviolet sensor sequentially penetrates through the bottom side face of the sensor fixing seat, the metal sleeve, the strip-shaped mounting plate, the adjusting pipe, the U-shaped clamping seat, the short pipe, the side square pipe, the vertical pipe and the square shell and then enters the square shell.

Furthermore, a wire outlet strip-shaped hole is formed in the pipe wall of the adjusting pipe along the length direction of the adjusting pipe; the second electric connection cable in the adjusting pipe extends out of the outlet strip-shaped hole and then penetrates through the U-shaped clamping seat to enter the short pipe; and metal mesh shielding layers are embedded into the pipe walls of the adjusting pipe, the short pipe and the side square pipe.

Compared with the prior art, the utility model, its beneficial effect is: the support rods can be conveniently adjusted to be transversely installed or vertically installed through the matching of the upper side limiting notch and the lower side limiting notch arranged on the support hinged plate and the limiting convex blocks, so that the insulation plate can be conveniently installed on the vertical inner wall or the bottom inner wall of the switch cabinet according to the field installation requirement; the locking pressure spring can be used for conveniently and rapidly embedding the limiting lug into the upper limiting notch or the lower limiting notch after adjustment, and the position can be locked after adjustment; the detection requirements of the temperature and the environment humidity of a device to be detected in the switch cabinet can be met by utilizing the infrared temperature sensor and the air humidity sensor; the ultraviolet pulse light signals can be collected by utilizing the ultraviolet sensor and the A/D collecting circuit, so that the microprocessor analyzes the number of pulses and analyzes the density of the number of pulses to judge the discharge strength, and whether fault risks exist or not is judged; utilize wireless communication module can be convenient for send out the cubical switchboard with the temperature data, humidity data and the ultraviolet pulse data wireless of gathering outside, the host computer of being convenient for carries out the remote monitoring of temperature, humidity and discharge intensity.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a partial structure of the U-shaped clamp seat of the present invention;

fig. 3 is a schematic view of a local structure at the installation position of the temperature and humidity branch support of the present invention;

FIG. 4 is a schematic view of a partial structure of the ultraviolet branch bracket of the present invention;

fig. 5 is a schematic view of the end face structure of the extension pipe of the present invention;

FIG. 6 is a schematic view of the end structure of the adjusting tube of the present invention;

fig. 7 is a schematic diagram of the circuit structure of the present invention.

Detailed Description

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

Example 1:

as shown in fig. 1-7, the utility model discloses a cubical switchboard partial discharge monitoring system includes: the device comprises a square shell 1, a fixed mounting bracket, a sensor mounting bracket, a temperature and humidity branch bracket, an ultraviolet branch bracket, an infrared temperature sensor 25, an air humidity sensor 26 and an ultraviolet sensor 36;

a power module, a microprocessor, an A/D acquisition circuit and a wireless communication module are arranged in the square shell 1; the fixed mounting bracket comprises a supporting rod 2, a mounting plate 3, an insulating plate 4, a locking compression spring 7, a locking ring sheet 8 and two bracket hinged plates 10; the two support hinged plates 10 are vertically and parallelly arranged on one vertical side surface of the square shell 1; one end of the support rod 2 is hinged between the two support hinged plates 10 in a swinging way through a swinging rotating shaft 13, and the other end is vertically and fixedly arranged on the mounting plate 3; the vertical side edges of the two support hinged plates 10 are respectively provided with an upper side limiting notch 11, and the lower side edges of the two support hinged plates 10 are respectively provided with a lower side limiting notch 12; the locking ring piece 8 is arranged on the support rod 2 in a sliding way, and two limiting lugs 9 are arranged on the ring surface of the locking ring piece 8; the locking compression spring 7 is sleeved on the support rod 2, and a support convex ring 6 is arranged on the support rod 2; the locking compression spring 7 is elastically supported between the locking ring sheet 8 and the supporting convex ring 6; when the supporting rod 2 swings to the vertical direction, the two limiting lugs 9 are respectively embedded into the two lower limiting notches 12; when the supporting rod 2 swings to the transverse direction, the two limiting lugs 9 are respectively embedded into the two upper limiting notches 11; 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;

the sensor mounting bracket is arranged on the side surface of the top of the square shell 1, and the temperature and humidity branch bracket and the ultraviolet branch bracket can be detachably arranged on the sensor mounting bracket; the infrared temperature sensor 25 and the air humidity sensor 26 are arranged on the temperature and humidity branch bracket, and the first electric connection cables 20 of the infrared temperature sensor 25 and the air humidity sensor 26 extend into the square shell 1; the ultraviolet sensor 36 is arranged on the ultraviolet sensing bracket, and the second electric connecting cable 30 of the ultraviolet sensor 36 extends into the square shell 1; the microprocessor is electrically connected with an infrared temperature sensor 25 and an air humidity sensor 26 through a first electric connecting cable 20; 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 36 through a second electric connection cable 30; the power supply module respectively supplies power to the infrared temperature sensor 25 and the air humidity sensor 26 through a first electric connection cable 20, and supplies power to the ultraviolet sensor 36 through a second electric connection cable 30; 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.

Through the matching of the upper limiting notch 11 and the lower limiting notch 12 arranged on the support hinged plate 10 and the limiting bump 9, the supporting rod 2 can be conveniently adjusted to be installed transversely or vertically, so that the insulating plate 4 can be conveniently installed on the vertical inner wall or the bottom inner wall of the switch cabinet according to the field installation requirement; the locking compression spring 7 can be used for conveniently and rapidly embedding the limiting lug 9 into the upper limiting notch 11 or the lower limiting notch 12 after adjustment and locking the position after adjustment; the detection requirements of the temperature and the environment humidity of a device to be detected in the switch cabinet can be met by utilizing the infrared temperature sensor 25 and the air humidity sensor 26; ultraviolet pulse light signals can be acquired by the ultraviolet sensor 36 and the A/D acquisition circuit, so that the microprocessor analyzes the number of pulses and analyzes the density of the number of pulses to judge the discharge strength, and whether fault risks exist or not is judged; utilize wireless communication module can be convenient for send out the cubical switchboard with the temperature data, humidity data and the ultraviolet pulse data wireless of gathering outside, the host computer of being convenient for carries out the remote monitoring of temperature, humidity and discharge intensity.

Further, the fixed mounting bracket comprises a vertical pipe 14, two U-shaped clamping seats 15, two locking bolts 16 and a side square pipe 31; the lower end of the vertical pipe 14 is rotatably installed at the center of the top surface of the square shell 1; one end of the side square tube 31 is vertically and fixedly arranged on the vertical tube 14, and the upper part of the other end of the side square tube 31 is rotatably provided with a short tube 32; the two U-shaped clamping seats 15 are fixedly arranged on the upper end part of the vertical pipe 14 and the upper end part of the short pipe 32 respectively; 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 the 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 at the two sides of the U-shaped clamping seat 15 are respectively and rotatably provided with a clamping support seat 17 through a rotating pin 21, and the opposite inner side surfaces of the two clamping support seats 17 are respectively provided with an arc-shaped clamping groove 18; the temperature and humidity branch bracket is clamped on two clamping supports 17 of a U-shaped clamping seat 15 at the upper end part of the vertical pipe 14; the uv branch stent is clamped on the two clamping seats 17 of the U-shaped clamping seat 15 at the upper end of the short tube 32. The clamping position and swing height adjustment of the extension pipe 19 and the adjusting pipe 29 can be facilitated by using two rotatably mounted clamping supports 17; with the rotary mounting of the vertical tube 14, it is possible to facilitate adjustment of the horizontal pointing angles of the extension tube 19 and the adjustment tube 29; with the rotary mounting of the stub 32, it is possible to facilitate individual adjustment of the horizontal pointing angle of the adjustment tube 29.

Further, the temperature and humidity branch support comprises an extension pipe 19, a positioning bolt 22 and a sensor mounting seat 24; the extension pipe 19 is clamped between the two arc-shaped clamping grooves 18; a hinged notch is provided at the end of the extension pipe 19; a hinge seat 23 is arranged on the sensor mounting seat 24, and the hinge seat 23 is mounted on the hinge notch in a hinge mode through a positioning bolt 22; the infrared temperature sensor 25 and the air humidity sensor 26 are both mounted on the sensor mounting seat 24; the first electric connection cables 20 of the infrared temperature sensor 25 and the air humidity sensor 26 sequentially penetrate through the sensor mounting seat 24, the hinge seat 23, the extension pipe 19, the U-shaped clamping seat 15, the vertical pipe 14 and the square shell 1 and then enter the square shell 1. The detection angles of the infrared temperature sensor 25 and the air humidity sensor 26 can be further conveniently adjusted by the cooperation of the positioning bolt 22 and the hinge base 23.

Further, a strip-shaped outlet notch 27 is formed in the pipe wall of the extension pipe 19 along the length direction of the extension pipe; the first 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; a metal mesh shielding layer 28 is embedded in the pipe wall of each of the extension pipe 19 and the vertical pipe 14. The strip-shaped wire outlet notch 27 can facilitate the wire outlet of the first electric connection cable 20, and when the extension pipe 19 is regulated in the clamping position, the first electric connection cable 20 can be led out from the U-shaped clamping seat 15; the first electrical connection cable 20 penetrating through the metal mesh shielding layer 28 can be subjected to interference shielding, and stability and reliability of the sensing signal are ensured.

Further, the ultraviolet branch bracket comprises an adjusting pipe 29, a strip-shaped mounting plate 33, a strip-shaped bending plate 34, an inner side backing plate 37, a positioning locking nut 38 and a sensor fixing seat 35; the adjusting pipe 29 is clamped and installed between the two arc-shaped clamping grooves 18; the middle part of the strip-shaped mounting plate 33 is fixedly arranged on the end part of the adjusting pipe 29; two ends of the strip-shaped bending plate 34 are respectively and fixedly arranged on two ends of the strip-shaped mounting plate 33, and an angle adjusting strip-shaped hole is formed in the plate surface of the strip-shaped bending plate 34 along the length direction of the plate surface; the ultraviolet sensor 36 is fixedly arranged on the top side surface of the sensor fixing seat 35, and an arc groove is arranged on the bottom side surface of the sensor fixing seat 35; a metal sleeve 39 is arranged in the arc groove, and a positioning locking external thread is arranged on the outer wall of the metal sleeve 39; one side plate surface of the inner backing plate 37 is provided with an arc convex surface, and a center round hole is arranged in the center of the plate surface of the inner backing plate 37 in a penetrating manner; the metal sleeve 39 penetrates through the angle adjusting strip-shaped hole and the central circular hole in sequence, the arc groove is attached to the outer side plate surface of the strip-shaped bending plate 34, and the arc convex surface is attached to the inner side plate surface of the strip-shaped bending plate 34; the positioning locking nut 38 is screwed on the positioning locking external thread and extrudes the inner backing plate 37; the second electric connection cable 30 of the ultraviolet sensor 36 sequentially penetrates through the bottom side of the sensor fixing seat 35, the metal sleeve 39, the strip-shaped mounting plate 33, the adjusting pipe 29, the U-shaped clamping seat 15, the short pipe 32, the side square pipe 31, the vertical pipe 14 and the square shell 1 and then enters the square shell 1. The sensor mounting head structure formed by the strip mounting plate 33, the strip bending plate 34, the inner backing plate 37, the metal sleeve 39, the positioning locking nut 38 and the sensor fixing seat 35 can be used for conveniently adjusting the detection orientation angle of the ultraviolet sensor 36 and aligning to a device to be detected in the switch cabinet.

Further, a line outlet strip-shaped hole 40 is formed in the pipe wall of the adjusting pipe 29 along the length direction of the adjusting pipe; the second electric connection cable 30 in the adjusting pipe 29 extends out from the outlet strip-shaped hole 40 and then penetrates through the U-shaped clamping seat 15 to enter the short pipe 32; the metal mesh shielding layer 28 is embedded in the pipe walls of the adjusting pipe 29, the short pipe 32 and the side square pipe 31. The outgoing line strip-shaped hole 40 is used for facilitating the outgoing of the second electric connection cable 30, and when the clamping position of the adjusting pipe 29 is adjusted, the second electric connection cable 30 can be led out from the U-shaped clamping seat 15; the metal mesh shielding layer 28 can be used for carrying out interference shielding on the second electric connection cable 20 penetrating through the metal mesh shielding layer, so that the stability and reliability of the sensing signal are ensured.

The utility model discloses an among the cubical switchboard partial discharge monitoring system: the microprocessor is composed of an existing microcontroller and peripheral circuits thereof, the microcontroller is an 16/32-bit ARM7 TDMI-S-based microcontroller, 128kB of the microcontroller is an on-chip Flash memory, and the on-chip Flash memory is enough to accommodate a complete version of a protocol stack without externally expanding the memory; the wireless communication module comprises an antenna and a radio frequency front end transceiver composed of a chip CC2591, a Power Amplifier (PA) for transmitting and a Low Noise Amplifier (LNA) for receiving are integrated in the chip CC2591, the IEEE802.15.4 communication protocol standard is selected, automatic networking can be performed, the working frequency band is 2405 MHz-2480 MHz, the data transmission rate is 250Kbps, the communication range is 300-450 meters, the performance is high, the power consumption is low, the cost is low, and a single network can accommodate at most 30 nodes; the infrared temperature sensor 25 is an existing digital infrared temperature sensor and is used for carrying out non-contact temperature measurement on a device to be measured in the switch cabinet; the air humidity sensor 26 is an existing humidity sensor and is used for detecting the air humidity in the switch cabinet in real time; the ultraviolet sensor 36 adopts the existing ultraviolet photosensitive tube and is used for sensing ultraviolet light generated by partial discharge in the switch cabinet, a pulse signal is output by a photoelectric effect, then an A/D acquisition circuit acquires the pulse signal, and the microprocessor compares the acquired pulse signal with a preset threshold value to obtain the number of pulses, so that the intensity of the number of pulses is analyzed to judge the intensity of the partial discharge; the A/D acquisition circuit adopts the existing acquisition circuit and consists of an A/D acquisition chip and a peripheral circuit thereof; the power module adopts the existing voltage stabilizing circuit and is used for respectively supplying power to the microprocessor, the wireless communication module, the infrared temperature sensor 25, the air humidity sensor 26, the ultraviolet sensor 36 and the A/D acquisition circuit.

When the switch cabinet partial discharge monitoring system is installed and used, the insulation board 4 is selectively installed on the vertical inner wall or the bottom inner wall of the switch cabinet according to the internal installation environment of the switch cabinet; the supporting rod 2 is adjusted to be horizontal or vertical so as to meet the installation requirement in the switch cabinet; after the support rod 2 is fixed, the axial clamping position of the extension pipe 19 is adjusted according to the position of a device to be detected, the lifting height and the horizontal angle of the end part of the extension pipe 19 are adjusted, and then the extension pipe 19 is fixed by rotating the locking bolt 16 through two clamping supports 17; then adjusting the orientation angles of the infrared temperature sensor 25 and the air humidity sensor 26 to point to the device to be tested; adjusting the axial clamping position of the adjusting pipe 29 according to the position of the device to be detected, adjusting the lifting height and the horizontal angle of the end part of the adjusting pipe 29, and then rotating the locking bolt 16 to fix the adjusting pipe 29 by using the two clamping supports 17; then the positioning locking nut 38 is loosened, the orientation angle of the ultraviolet sensor 36 is adjusted to point to the device to be measured, and then the positioning locking nut 38 is tightened for positioning; after the power module supplies power, the microprocessor acquires the sensing data of the infrared temperature sensor 25 and the air humidity sensor 26, the sensing data of the ultraviolet sensor 36 are acquired through the A/D acquisition circuit, the microprocessor compares the acquired pulse signals with a preset threshold value to acquire the number of pulses, the intensity of partial discharge is judged by analyzing the intensity of the number of pulses, and then the wireless communication module performs networking communication to upload the acquired data to an upper computer.

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

Claims

1. The utility model provides a cubical switchboard partial discharge monitoring system which characterized in that: the device comprises a square shell (1), a fixed mounting bracket, a sensor mounting bracket, a temperature and humidity branch bracket, an ultraviolet branch bracket, an infrared temperature sensor (25), an air humidity sensor (26) and an ultraviolet sensor (36);

a power module, a microprocessor, an A/D acquisition circuit and a wireless communication module are arranged in the square shell (1); the fixed mounting bracket comprises a supporting rod (2), a mounting plate (3), an insulating plate (4), a locking pressure spring (7), a locking ring sheet (8) and two bracket hinged plates (10); the two support hinged plates (10) are vertically and parallelly arranged on one vertical side surface of the square shell (1); one end of the supporting rod (2) is hinged and installed between the two support hinged plates (10) in a swinging way through a swinging rotating shaft (13), and the other end is vertically and fixedly installed on the installation plate (3); the vertical side edges of the two support hinged plates (10) are respectively provided with an upper side limiting notch (11), and the lower side edges of the two support hinged plates (10) are respectively provided with a lower side limiting notch (12); the locking ring piece (8) is arranged on the support rod (2) in a sliding way, and two limiting lugs (9) are arranged on the ring surface of the locking ring piece (8); the locking compression spring (7) is sleeved on the support rod (2), and a support convex ring (6) is arranged on the support rod (2); the locking compression spring (7) is elastically supported between the locking ring piece (8) and the supporting convex ring (6); when the supporting rod (2) swings to the vertical direction, the two limiting lugs (9) are respectively embedded into the two lower limiting notches (12); when the supporting rod (2) swings to the transverse direction, the two limiting lugs (9) are respectively embedded into the two upper limiting notches (11); 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);

the sensor mounting bracket is mounted on the side surface of the top of the square shell (1), and both the temperature and humidity branch bracket and the ultraviolet branch bracket can be detachably mounted on the sensor mounting bracket; an infrared temperature sensor (25) and an air humidity sensor (26) are mounted on the temperature and humidity branch support, and a first electric connection cable (20) of the infrared temperature sensor (25) and the air humidity sensor (26) extends into the square shell (1); the ultraviolet sensor (36) is arranged on the ultraviolet sensing bracket, and a second electric connection cable (30) of the ultraviolet sensor (36) extends into the square shell (1); the microprocessor is electrically connected with an infrared temperature sensor (25) and an air humidity sensor (26) through a first electric connection cable (20); 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 (36) through a second electric connection cable (30); the power supply module supplies power to the infrared temperature sensor (25) and the air humidity sensor (26) through a first electric connection cable (20) and supplies power to the ultraviolet sensor (36) through a second electric connection cable (30); 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 switchgear partial discharge monitoring system of claim 1, wherein: the fixed mounting bracket comprises a vertical pipe (14), two U-shaped clamping seats (15), two locking bolts (16) and a side square pipe (31); the lower end of the vertical pipe (14) is rotatably arranged at the center of the top surface of the square shell (1); one end of the side square tube (31) is vertically and fixedly arranged on the vertical tube (14), and the upper part of the other end of the side square tube (31) is rotatably provided with a short tube (32); the two U-shaped clamping seats (15) are respectively and fixedly arranged on the upper end part of the vertical pipe (14) and the upper end part of the short pipe (32); 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 temperature and humidity branch bracket is clamped on two clamping supports (17) of a U-shaped clamping seat (15) at the upper end part of the vertical pipe (14); the ultraviolet branch bracket is clamped on two clamping supports (17) of a U-shaped clamping seat (15) at the upper end part of the short pipe (32).

3. The switchgear partial discharge monitoring system of claim 2, wherein: the temperature and humidity branch support comprises an extension pipe (19), a positioning bolt (22) and a sensor mounting seat (24); the extension pipe (19) is clamped and installed between the two arc-shaped clamping grooves (18); a hinged notch is arranged at the end part of the extension pipe (19); a hinge seat (23) is arranged on the sensor mounting seat (24), and the hinge seat (23) is mounted on the hinge notch in a hinge mode through a positioning bolt (22); the infrared temperature sensor (25) and the air humidity sensor (26) are both arranged on the sensor mounting seat (24); a first electric connection cable (20) of the infrared temperature sensor (25) and the air humidity sensor (26) sequentially penetrates through the sensor mounting seat (24), the hinging seat (23), the extension pipe (19), the U-shaped clamping seat (15), the vertical pipe (14) and the square shell (1) and then enters the square shell (1).

4. The switchgear partial discharge monitoring system of claim 3, wherein: a strip-shaped outlet notch (27) is arranged on the pipe wall of the extension pipe (19) along the length direction; a first 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); and metal mesh shielding layers (28) are embedded into the pipe walls of the extension pipe (19) and the vertical pipe (14).

5. The switchgear partial discharge monitoring system of claim 2, wherein: the ultraviolet branch support comprises an adjusting pipe (29), a strip-shaped mounting plate (33), a strip-shaped bending plate (34), an inner side base plate (37), a positioning locking nut (38) and a sensor fixing seat (35); the adjusting pipe (29) is clamped and installed between the two arc-shaped clamping grooves (18); the middle part of the strip-shaped mounting plate (33) is fixedly arranged on the end part of the adjusting pipe (29); two ends of the strip-shaped bending plate (34) are respectively and fixedly arranged on two ends of the strip-shaped mounting plate (33), and an angle adjusting strip-shaped hole is formed in the plate surface of the strip-shaped bending plate (34) along the length direction of the plate surface; the ultraviolet sensor (36) is fixedly arranged on the side surface of the top of the sensor fixing seat (35), and an arc groove is formed in the side surface of the bottom of the sensor fixing seat (35); a metal sleeve (39) is arranged in the arc groove, and a positioning locking external thread is arranged on the outer wall of the metal sleeve (39); one side plate surface of the inner backing plate (37) is provided with an arc convex surface, and a center round hole is arranged in the center of the plate surface of the inner backing plate (37) in a penetrating manner; the metal sleeve (39) penetrates through the angle adjusting strip-shaped hole and the central circular hole in sequence, the arc groove is tightly attached to the outer side plate surface of the strip-shaped bending plate (34), and the arc convex surface is tightly attached to the inner side plate surface of the strip-shaped bending plate (34); the positioning locking nut (38) is screwed on the positioning locking external thread and extrudes the inner backing plate (37); a second electric connection cable (30) of the ultraviolet sensor (36) penetrates through the bottom side face of the sensor fixing seat (35), the metal sleeve (39), the strip-shaped mounting plate (33), the adjusting pipe (29), the U-shaped clamping seat (15), the short pipe (32), the side square pipe (31), the vertical pipe (14) and the square shell (1) in sequence and then enters the square shell (1).

6. The switchgear partial discharge monitoring system of claim 5, wherein: the pipe wall of the adjusting pipe (29) is provided with a linear outlet hole (40) along the length direction; a second electric connection cable (30) in the adjusting pipe (29) extends out of the outlet strip-shaped hole (40) and then penetrates through the U-shaped clamping seat (15) to enter the short pipe (32); and metal mesh shielding layers (28) are embedded into the pipe walls of the adjusting pipe (29), the short pipe (32) and the side square pipe (31).