CN117498197A - Thermal imaging alarm device for thermal fault of electric power high-voltage switch cabinet and application method - Google Patents

Abstract

The invention discloses a thermal imaging alarm device for thermal faults of an electric power high-voltage switch cabinet and an application method, which belong to the technical field of electric power cabinet alarm, and comprise the following components: the thermal imaging mechanism is arranged at the upper part in the cabinet, and the radiating mechanisms are arranged at the two sides of the cabinet body and are arranged downwards, and each radiating mechanism comprises an air vent arranged at the bottom of the cabinet body and a blowing mechanism arranged at the same position with the thermal imaging mechanism. Through signal connection between actuating mechanism and the thermal imaging subassembly, when the thermal imaging subassembly monitors the temperature of one side (left side or right side) of electric power cabinet and is higher, can control actuating mechanism and start to make the lead screw rotate, drive the cover and establish threaded sleeve (blowing mechanism) on the lead screw and slide to the higher side of electric power cabinet temperature along the length of lead screw, slide to the top of ventilation hole, accelerate ventilation around the ventilation hole, thereby make the higher side of electric power cabinet temperature dispel the heat fast.

Description

Thermal imaging alarm device for thermal fault of electric power high-voltage switch cabinet and application method

Technical Field

The invention relates to the technical field of power cabinet alarm, in particular to a thermal fault thermal imaging alarm device of a power high-voltage switch cabinet and an application method.

Background

Most of transformer substations of the existing power system are unattended transformer substations, are generally far away from an attended main control room, and a plurality of power high-voltage devices such as circuit breakers, transformers, lightning arresters, isolating switches, high-voltage leads, bus bars and the like in a power high-voltage switch cabinet of the unattended transformer substations are far away from a place with different places, and can generate heat during operation due to the electric and magnetic effects, and the heat can rapidly rise when the load is increased, the contact is poor or the equipment has overheat faults.

In the disclosure patent (patent number CN 105606227B), a wireless alarm device for a high-voltage switch power cabinet is disclosed, a circuit breaker, a mutual inductor, a lightning arrester, an isolating switch, a high-voltage lead, a bus bar and other power high-voltage devices in the power high-voltage switch cabinet are subjected to non-contact continuous on-line temperature measurement and overheat fault alarm of the equipment through the wireless alarm device by an infrared thermal imaging camera, a PLC (programmable logic controller) analyzes, judges and compares transmitted infrared thermal imaging video image signals of the equipment according to various equipment thermal imaging video standard map software which is set in advance, and processes the signals, when a certain power high-voltage device or a high-voltage wire, a wire clamp and a joint in the power high-voltage switch cabinet is overheated, the Wen Shengre imaging video signals exceed a set value, the PLC automatically controls the alarm to act, carries out audible and visual alarm warning, and timely reminds workers to adopt precautionary measures, and the method of carrying out direct current resistance test by eyes and ears on overheat faults of the power failure of the power high-voltage equipment of the power high-voltage switch cabinet or the method of carrying out direct current resistance test on the power failure change until the overheat faults of the equipment are seriously developed to the overheat fault of the equipment, has great advantage compared with the method of magnetic protection when the overheat faults of the equipment are seriously detected. The electric cabinet temperature monitoring system has the advantages that the electric cabinet temperature monitoring system is not applicable to the electric cabinet, and the temperature change inside the electric cabinet can be monitored in real time. Thereby preventing a series of dangers caused by the temperature rise in the power cabinet.

However, in the above-described technical solution, because the installation environment of the power cabinet is special, the power cabinet is often far away from the main control room and installed outdoors. In the use, because dust accumulates at the ventilation hole, the heat dissipation efficiency inside the electric power cabinet becomes poor, the infrared thermal imaging camera monitors the temperature to be higher, and even after the temperature is monitored to be higher, the heat dissipation capacity of the electric power cabinet cannot be improved.

Disclosure of Invention

A first object of the present invention is to provide a thermal imaging alarm device for thermal fault of an electric power high-voltage switch cabinet, so as to solve the problems set forth in the background art;

the second aim of the invention is to provide an application method of thermal imaging alarm for thermal fault of the electric power high-voltage switch cabinet;

in order to achieve the first object, the present invention provides the following technical solutions:

a thermal imaging alarm device for thermal faults of an electric power high-voltage switch cabinet, comprising: the thermal imaging mechanism is arranged above the inside of the cabinet, the radiating mechanism is arranged on two sides of the cabinet body and is arranged below the cabinet body, the radiating mechanism comprises an air vent arranged at the bottom of the cabinet body and a blowing mechanism arranged at the same position as the thermal imaging mechanism, the radiating mechanism further comprises a dust removing mechanism arranged on the air vent, the dust removing mechanism comprises a cleaning mechanism and a guiding mechanism for the cleaning mechanism to slide up and down, the cleaning mechanism comprises a sliding plate, cleaning strips which can be inserted into the air vent are sleeved on two sides of the sliding plate, a fixing plate is fixedly arranged above the cleaning strips, the upper part of the fixing plate is in sliding connection with the sliding plate through a guiding post, and a reset spring is sleeved on the guiding post.

As still further aspects of the invention: the top fixed mounting of electric power cabinet has actuating mechanism driven reciprocal subassembly, reciprocal subassembly includes lead screw and cover and establishes the screw thread cover that can control the removal on the lead screw, the bottom of screw thread cover passes through dead lever and mechanism fixed connection that bloies, the front end of screw thread cover passes through connecting rod and sliding sleeve fixed connection, sliding sleeve sliding connection on the guide bar, guide bar and lead screw parallel to each other design and fixed mounting are in the inside of electric power cabinet.

As still further aspects of the invention: the inner side of the guide mechanism is fixedly provided with uniformly distributed convex blocks, and convex plates corresponding to the convex blocks are arranged on two sides of the fixed plate.

As still further aspects of the invention: the dust blowing device comprises a frame body fixedly arranged on two sides of the fixing plate, a group of air outlet cylinders with the same size are fixedly arranged in the frame body, and connecting columns are fixedly arranged at the tops of piston plates of the air outlet cylinders.

As still further aspects of the invention: wherein a communicating pipe communicated with the air outlet cylinder is arranged between the two frame bodies, an air outlet pipe which is downwards designed is arranged on the communicating pipe, and the air outlet pipe is designed towards the air vent hole

As still further aspects of the invention: the guide mechanism is characterized in that a toothed plate is fixedly arranged on the outer side wall of the guide mechanism, rotating gears are rotatably connected to the two ends of the sliding plate, and the eccentric positions of the rotating gears are movably connected with the two connecting columns through connecting mechanisms.

As still further aspects of the invention: wherein, be provided with recovery stage and pushing away the gas stage on the pinion rack.

As still further aspects of the invention: the electric cabinet is characterized in that air guide mechanisms are fixedly mounted on two side walls of the electric cabinet and comprise guide plates fixedly connected with the side walls of the electric cabinet, and the guide plates are designed to be wide in upper part and narrow in lower part.

As still further aspects of the invention: wherein the cleaning strip is made of elastic materials.

To achieve the above second object;

the thermal imaging alarm application method for the thermal fault of the electric power high-voltage switch cabinet is characterized by comprising the following steps of:

step one: the infrared thermal imaging mechanism is started, and temperature monitoring is carried out on each component in the cabinet body through the thermal imaging mechanism;

step two: the infrared thermal imaging mechanism transmits signals with temperature data to the main control room through the transmitting device by wireless transmission of infrared thermal imaging signals;

step three: the main control room displays the temperature data inside the cabinet body through an external imaging display.

Compared with the prior art, the invention has the beneficial effects that:

1. through signal connection between actuating mechanism and the thermal imaging subassembly, when the thermal imaging subassembly monitors the temperature of one side (left side or right side) of electric power cabinet and is higher, can control actuating mechanism and start to make the lead screw rotate, drive the cover and establish threaded sleeve (blowing mechanism) on the lead screw and slide to the higher side of electric power cabinet temperature along the length of lead screw, slide to the top of ventilation hole, accelerate ventilation around the ventilation hole, thereby make the higher side of electric power cabinet temperature dispel the heat fast.

2. When the fixed plate receives upward force, the guide post is driven to move upwards on the sliding plate, so that the reset spring is extruded to have elastic potential energy, after the resistance of the fixed plate disappears, the elastic potential energy of the reset spring is converted into kinetic energy, and the guide post drives the fixed plate and the cleaning strip to move downwards, namely, the guide post is inserted into the air exchanging hole to clean adhered dust in the air exchanging hole.

3. After the rotating gear rotates for half a circle, a recovery stage a (namely, the connection point of the connecting mechanism and the rotating gear moves from the bottommost part of the rotating gear to the top part) is arranged, in the stage, the design of the ventilation hole ensures that dust cannot be sucked in during air suction, and after the recovery stage a is finished, the air pushing stage b is restarted. Under the continuous pushing action, dust can be prevented from being carried in each time the cleaning strip is pulled out. The number of the recovery stages a and the number of the air pushing stages b are required according to actual use.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic view of the inside of the cabinet structure of the present invention;

FIG. 3 is an enlarged schematic view of the structure A of FIG. 2 according to the present invention;

FIG. 4 is a schematic diagram of a heat dissipation mechanism according to the present invention;

FIG. 5 is a schematic view of the back of the dust removing mechanism of the present invention;

FIG. 6 is an enlarged schematic view of the structure B of FIG. 5 according to the present invention;

FIG. 7 is a schematic front view of a dust removing mechanism according to the present invention;

FIG. 8 is a schematic view showing the movement of the fixing plate in the guide mechanism according to the present invention;

FIG. 9 is an enlarged schematic view of the structure C of FIG. 8 in accordance with the present invention;

fig. 10 is a schematic diagram showing the alternate distribution of the recovery phase and the pushing phase of the rotating gear in the present invention.

The correspondence between the reference numerals and the component names in the drawings is as follows:

100. an electric power cabinet; 10. a thermal imaging mechanism; 20. a heat dissipation mechanism; 21. an air vent; 22. a blowing mechanism; 221. a square frame; 30. a reciprocating assembly; 31. a screw rod; 32. a thread sleeve; 33. a fixed rod; 34. a sliding sleeve; 35. a guide rod; 40. a dust removing mechanism; 41. a cleaning mechanism; 411. a sliding plate; 412. cleaning the strip; 413. a fixing plate; 414. a guide post; 415. a return spring; 416. a bump; 417. a convex plate; 42. a guide mechanism; 421. a toothed plate; 422. rotating the gear; 423. a connecting mechanism; 50. a dust blowing device; 51. a frame; 511. a communicating pipe; 512. an air outlet pipe; 52. an air outlet tube; 53. a connecting column; 60. an air guide mechanism; 61. and a guide plate.

Detailed Description

Referring to fig. 1, a schematic overall structure of an electric power cabinet 100 according to the present invention is shown, and the electric power cabinet 100 includes a thermal imaging mechanism 10 disposed above and in the cabinet, and a heat dissipation mechanism 20 disposed at two sides of the cabinet and mounted below. In this embodiment, the thermal imaging mechanism 10 can monitor the temperature of the components in the power cabinet 100, and the monitored temperature changes are transmitted to the master control room system through the wireless transceiver, so as to realize the visual continuous monitoring effect.

As shown in fig. 1, 2 and 3, when the power cabinet 100 is used, dust may be accumulated in the ventilation process due to the two ventilation holes 21 arranged at the bottom of the power cabinet, so that ventilation efficiency is deteriorated, and most ventilation holes are cleaned by manual cleaning after being blocked, which is very troublesome. In this embodiment, the heat dissipation mechanism 20 further includes a blower mechanism 22 disposed at the same position as the thermal imaging mechanism 10, a reciprocating assembly 30 driven by a driving mechanism is fixedly mounted at the top of the power cabinet 100, the reciprocating assembly 30 includes a screw rod 31 and a threaded sleeve 32 sleeved on the screw rod 31 and capable of moving left and right, the bottom of the threaded sleeve 32 is fixedly connected with the blower mechanism 22 through a fixing rod 33, the front end of the threaded sleeve 32 is fixedly connected with a sliding sleeve 34 through a connecting rod, the sliding sleeve 34 is slidably connected on a guide rod 35, and the guide rod 35 and the screw rod 31 are designed in parallel and fixedly mounted inside the power cabinet 100. In this embodiment, through signal connection between the driving mechanism and the thermal imaging mechanism 10, when the thermal imaging mechanism 10 monitors that the temperature of one side (left side or right side) of the power cabinet 100 is higher, the driving mechanism can be controlled to be started, so that the screw rod 31 rotates, and the threaded sleeve 32 (the blowing mechanism 22) sleeved on the screw rod 31 is driven to slide along the length of the screw rod 31 to the side with higher temperature of the power cabinet 100, slide to the upper side of the ventilation hole 21, and accelerate ventilation around the ventilation hole 21, thereby enabling the side with higher temperature of the power cabinet 100 to dissipate heat rapidly.

The reciprocating assembly 30 is provided with a reset mechanism, when the data monitored by the thermal imaging mechanism 10 is recovered to a normal value after the air blowing mechanism 22 is cooled above the ventilation hole 21, a signal is sent to the reset mechanism, and the reset mechanism controls the driving mechanism to rotate so as to drive the air blowing mechanism 22 to return to an initial position (namely, the middle position of the power cabinet 100).

In order to improve the downward blowing efficiency of the blowing mechanism 22, the blowing mechanism 22 includes a square frame 221 with a downward opening, and blades (not shown) rotating inside the square frame 221, and the other surfaces of the square frame 221 are sealed so that the wind direction of the blades blows only to the lower side of the power cabinet 100.

As shown in fig. 5 and 6, the heat dissipation mechanism 20 further includes a dust removal mechanism 40 disposed on the ventilation hole 21, the dust removal mechanism 40 includes a cleaning mechanism 41 and a guiding mechanism 42 for the cleaning mechanism 41 to slide up and down, the cleaning mechanism 41 includes a sliding plate 411, cleaning strips 412 capable of being inserted into the ventilation hole 21 are sleeved on two sides of the sliding plate 411, the cleaning strips 412 are made of elastic materials, a fixing plate 413 is fixedly mounted above the cleaning strips 412, the upper side of the fixing plate 413 is slidably connected with the sliding plate 411 through a guiding column 414, and a return spring 415 is sleeved on the guiding column 414. In this embodiment, when the fixing plate 413 receives an upward force, the guide post 414 is driven to move upward on the sliding plate 411, so that the return spring 415 is pressed to have elastic potential energy, and when the resistance of the fixing plate 413 disappears, the elastic potential energy of the return spring 415 is converted into kinetic energy, so that the guide post 414 drives the fixing plate 413 and the cleaning bar 412 to move downward, that is, the cleaning bar is inserted into the ventilation hole 21 to clean the adhered dust in the ventilation hole 21.

In order to avoid rainwater entering the power cabinet 100 in actual use, the ventilation holes 21 are formed to be inclined downward from the inside to the outside, as shown in fig. 1. So in this case, in order to get better access of the cleaning strip 412 into the ventilation aperture 21. The inner side of the guiding mechanism 42 is fixedly provided with uniformly distributed protruding blocks 416, two sides of the fixing plate 413 are provided with protruding plates 417 corresponding to the protruding blocks 416, when the protruding plates 417 are contacted with the protruding blocks 416, the fixing plate 413 generates upward force, so that the cleaning strip 412 is lifted away from the air exchanging holes 21, when the protruding plates 417 are separated from the protruding blocks 416, the protruding plates 417 (i.e. the fixing plate 413) enter into grooves between two adjacent protruding blocks 416, and then the protruding plates 417 (i.e. the fixing plates 413) enter into the air exchanging holes 21 after losing limiting force. In the above embodiment, the cleaning of dust in the air exchanging hole 21 can be achieved.

As shown in fig. 7 and 8, in order to maintain the above-described reciprocation, in this embodiment, it is necessary to maintain the same distance between the projections 416 and the ventilation holes 21 so that the cleaning bar 412 can enter the ventilation holes 21 when the projection 417 falls into the recess.

However, since the cleaning strip 412 is pulled out from the ventilation hole 21 by lifting the fixing plate 413 after being inserted into the ventilation hole 21, dust on the sidewall of the ventilation hole 21 is also brought into the power cabinet 100 by pulling out the cleaning strip 412, and dust of fine particles is quickly adsorbed due to the existence of the conduction of the power cabinet 100, thereby causing excessive dust adsorption of components inside the power cabinet 100 and degrading the working performance. Therefore, the dust blowing devices 50 are fixedly installed on two sides of the fixing plate 413, the dust blowing devices 50 comprise a frame body 51 fixedly installed on two sides of the fixing plate 413, a group of air outlet cylinders 52 with the same size are fixedly installed inside the frame body 51, connecting columns 53 are fixedly installed on the tops of the piston plates of the air outlet cylinders 52, and in the process of pushing the piston plates downwards through the connecting columns 53 in the inner movement process of the air outlet cylinders 52, air inside the air outlet cylinders 52 can be pushed out to form air pulses to blow dust brought by the cleaning strips 412.

A communicating pipe 511 communicated with the air outlet tube 52 is arranged between the two frame bodies 51, an air outlet pipe 512 which is downwards designed is arranged on the communicating pipe 511, and the air outlet pipe 512 is designed towards the air vent 21. The gas in the gas outlet tube 52 can enter the gas outlet tube 512 through the communicating tube 511 to be ejected, and the dust is discharged.

As shown in fig. 8, 9 and 10, in order to improve the linkage of the present embodiment, a toothed plate 421 is fixedly mounted on the outer sidewall of the guide mechanism 42, and rotation gears 422 are rotatably connected to both ends of the sliding plate 411, and an eccentric position of the rotation gears 422 is movably connected to two connection posts 53 through a connection mechanism 423. When the pushing mechanism pushes the sliding plate 411 to move on the guiding mechanism 42, after the rotating gear 422 contacts with the toothed plate 421, the rotating gear 422 will rotate under the meshing action of the two, and the rotating gear 422 will cooperate with the connecting mechanism 423 to drive the two connecting posts 53 to move downward in the air outlet barrel 52 during rotation, so as to generate an air pushing action. After the turning gear 422 has been turned a half turn, a recovery phase a is provided (i.e. the connection point of the connection mechanism 423 with the turning gear 422 moves from the bottommost part of the turning gear 422 to the top part), during which the ventilation holes 21 are designed to ensure that no dust is sucked in during suction. After the recovery phase a is completed, the pushing phase b is re-entered. Under continued pushing action, it is ensured that no dust is carried in each extraction of the cleaning bar 412. The number of the recovery stages a and the number of the air pushing stages b are required according to actual use.

As shown in fig. 4, the wind guiding mechanisms 60 are fixedly mounted on two side walls of the power cabinet 100, the wind guiding mechanisms 60 include a guide plate 61 fixedly connected with the side walls of the power cabinet 100, the guide plate 61 is designed to be wide at the top and narrow at the bottom, when wind power generated by the fan blades is blown from the top to the bottom of the power cabinet 100, more wind is collected by the wide portion 61a of the guide plate 61, after the wind is collected and enters the guide plate 61, because of the design of the narrow portion 61b below the guide plate, the wind speed is increased, so that the pressure intensity is small at the place where the wind speed is large according to the bernoulli principle, the pressure intensity is small at the heat dissipating mechanism 20, and the temperature at other places of the power cabinet 100 flows from the place where the pressure intensity is high to the place where the pressure intensity is low under the action of the pressure intensity difference, so that the wind can be discharged along the ventilation holes 21.

The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims (10)

1. The utility model provides an electric power high tension switchgear thermal fault thermal imaging alarm device which characterized in that includes: the utility model provides a thermal imaging mechanism (10) of top in the cabinet to and set up in cabinet body both sides and lean on radiating mechanism (20) of installation down, radiating mechanism (20) including setting up in the air vent (21) of cabinet body bottom, and with mechanism (22) of blowing of thermal imaging mechanism (10) setting in same department, radiating mechanism (20) are still including setting up dust removal mechanism (40) on air vent (21), dust removal mechanism (40) include clearance mechanism (41) and supply clearance mechanism (41) gliding guiding mechanism (42) from top to bottom, clearance mechanism (41) include sliding plate (411), the both sides cover of sliding plate (411) is equipped with clearance strip (412) that can insert inside air vent (21), the top fixed mounting of clearance strip (412) has fixed plate (413), the top of fixed plate (413) is through guide post (414) and sliding plate (411) sliding connection, the cover is equipped with reset spring (415) on guide post (414).

2. The thermal imaging warning device for thermal faults of the electric power high-voltage switch cabinet according to claim 1, characterized in that a reciprocating assembly (30) driven by a driving mechanism is fixedly arranged at the top of the electric power cabinet (100), the reciprocating assembly (30) comprises a screw rod (31) and a threaded sleeve (32) sleeved on the screw rod (31) and capable of moving left and right, the bottom of the threaded sleeve (32) is fixedly connected with a blowing mechanism (22) through a fixing rod (33), the front end of the threaded sleeve (32) is fixedly connected with a sliding sleeve (34) through a connecting rod, the sliding sleeve (34) is in sliding connection with a guide rod (35), and the guide rod (35) and the screw rod (31) are mutually parallel and fixedly arranged in the electric power cabinet (100).

3. The thermal imaging warning device for thermal faults of the electric power high-voltage switch cabinet according to claim 2 is characterized in that the inner side of the guide mechanism (42) is fixedly provided with evenly distributed convex blocks (416), and two sides of the fixed plate (413) are provided with convex plates (417) corresponding to the convex blocks (416).

4. The thermal imaging warning device for thermal faults of the electric power high-voltage switch cabinet according to claim 2 is characterized in that dust blowing devices (50) are fixedly installed on two sides of the fixed plate (413), the dust blowing devices (50) comprise frame bodies (51) fixedly installed on two sides of the fixed plate (413), a group of air outlet cylinders (52) with the same size are fixedly installed in the frame bodies (51), and connecting columns (53) are fixedly installed at the tops of piston plates of the air outlet cylinders (52).

5. The thermal imaging alarm device for thermal fault of electric power high-voltage switch cabinet according to claim 4, characterized in that a communicating pipe (511) communicated with the air outlet tube (52) is arranged between the two frame bodies (51), an air outlet pipe (512) which is designed downwards is arranged on the communicating pipe (511), and the air outlet pipe (512) is designed towards the air exchanging hole (21).

6. The thermal imaging warning device for thermal faults of an electric high-voltage switch cabinet according to claim 4 is characterized in that a toothed plate (421) is fixedly arranged on the outer side wall of the guide mechanism (42), rotating gears (422) are rotatably connected to two ends of the sliding plate (411), and the eccentric position of each rotating gear (422) is movably connected with two connecting columns (53) through a connecting mechanism (423).

7. The thermal imaging warning device for thermal faults of a power high voltage switchgear according to claim 6 characterised in that the toothed plate (421) is provided with a recovery phase and a pushing phase.

8. The thermal imaging warning device for thermal faults of the electric power high-voltage switch cabinet according to claim 1, wherein the air guide mechanisms (60) are fixedly arranged on two side walls of the electric power cabinet (100), the air guide mechanisms (60) comprise guide plates (61) fixedly connected with the side walls of the electric power cabinet (100), and the guide plates (61) are designed to be wide in upper part and narrow in lower part.

9. The electrical high voltage switchgear thermal fault thermal imaging warning device according to claim 1, characterized in that the cleaning strip (412) is made of an elastic material.

10. The thermal imaging alarm application method for the thermal fault of the electric power high-voltage switch cabinet is characterized by comprising the following steps of:

step one: opening an infrared thermal imaging mechanism (10), and monitoring the temperature of each component in the cabinet body through the thermal imaging mechanism (10);

step two: the infrared thermal imaging mechanism (10) transmits signals with temperature data to the main control room through the transmitting device by wireless transmission of infrared thermal imaging signals;

step three: the main control room displays the temperature data inside the cabinet body through an external imaging display.