Intelligent fault detection device for low-voltage switch cabinet

Abstract

The invention discloses an intelligent fault detection device for a low-voltage switch cabinet, and relates to the technical field of electrical power measurement, and the intelligent fault detection device comprises an auxiliary mobile detection box, and one side of the auxiliary mobile detection box is fixedly connected with a side surface installation cover. A plurality of discharge detection pins are aligned with the switch cabinet to gradually move until the discharge detection pins act on parts needing to be detected on the outer side of the switch cabinet or in the switch cabinet, at the moment, protection treatment can be conducted through the buffer protection mechanism, and the integrated intelligent surface treatment mechanism scans a sensor to detect the dust concentration and automatically starts a fan and an air outlet pipeline to conduct directional dust removal; electrical detection is carried out immediately after dust removal, and environmental interference is eliminated; according to the invention, the problems of low coverage rate, easy equipment damage, response lag and environmental interference in low-voltage switch cabinet fault detection are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical power measurement, in particular to a low-voltage switch cabinet intelligent fault detection device. BACKGROUND

[0002] As a key node of the power system, the failure of the low-voltage switch cabinet will cause large-area power failure and even equipment explosion.

[0003] Chinese Patent Publication No. CN 223109533 U discloses a low-voltage switch cabinet intelligent drawer fault detection device. The utility model provides a low-voltage switch cabinet intelligent drawer fault detection device which can detect various faults of the low-voltage switch cabinet intelligent drawer and improve the efficiency of the intelligent drawer. The low-voltage switch cabinet intelligent drawer fault detection device comprises a detector, a display and an indicator. The detector is connected with the display at the front upper part, and the detector is rotatably connected with the indicator at the front lower part. The utility model detects the running stability of the intelligent drawer through the sensor, or clamps the contact through the lower clamp plate and the upper clamp plate, and then makes the detector detect the line fault on the contact or the contact. The utility model has the advantages of convenient detection of various faults of the low-voltage switch cabinet intelligent drawer and improved efficiency of the intelligent drawer.

[0004] However, the above-mentioned scheme still has the following problems: Local detection blind area: fixed sensors cannot cover the entire area of the switch cabinet, especially the high and low dead angles; Weak protection: contact probes are easily damaged by mechanical impact, and the false alarm rate of faulty probes is high; Response lag: manual inspection cycle is long, and instantaneous faults cannot be captured in real time; Large environmental interference: dust accumulation and temperature rise lead to misjudgment, and traditional dust removal relies on manual operation, which has high downtime cost and cannot meet the normal use requirements. Therefore, the present application needs to design a low-voltage switch cabinet intelligent fault detection device to solve the above-mentioned problems. SUMMARY

[0005] The present application aims to provide a low-voltage switch cabinet intelligent fault detection device to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a low-voltage switch cabinet intelligent fault detection device comprising an auxiliary mobile detection box: A side mounting cover is fixedly connected to one side of the auxiliary mobile detection box. Four fault detection mechanisms are installed on the outside of the side mounting cover, and are distributed vertically and vertically on the outside of the side mounting cover. Each fault detection mechanism includes a multi-source sensor acquisition device. The multi-source sensor acquisition device is installed on the outside of the side mounting cover and is fixedly connected to a symmetrically distributed discharge detection pin. Two current transformers are installed between each two discharge detection pins. A surface treatment mechanism is provided on the outer side of the side mounting cover and between every two adjacent fault detection mechanisms. The surface treatment mechanism includes a fan mounting bracket, and symmetrically distributed air outlet ducts are installed on the outer side of the fan mounting bracket. The auxiliary mobile detection box is fixedly connected to a fixed baffle, and an internal detection mechanism is installed on one side of the fixed baffle. An early warning platform is fixedly connected to the top of the auxiliary mobile detection box, and a control panel is fixedly connected to the top of the early warning platform. Two symmetrically distributed infrared thermal imagers are fixedly connected to the top of the control panel, and scanning sensors are installed inside both infrared thermal imagers.

[0007] In a preferred embodiment of the present invention, a buffer protection mechanism is installed on the other side of the fixed baffle and is used in conjunction with a corresponding multi-source sensor acquisition device. The buffer protection mechanism includes springs and shock absorbers. An equally spaced positioning plate is fixedly connected to the other side of the fixed baffle. An equally spaced spring is fixedly connected to one side of each positioning plate. A shock absorber is installed inside each spring. A protective pressure plate is fixedly connected to one side of each spring. A movable sliding plate is slidably connected to one side of each protective pressure plate. One side of each multi-source sensor acquisition device is connected to the movable sliding plate. An equally spaced positioning frame is installed on the other side of each movable sliding plate.

[0008] In a preferred embodiment of the present invention, a buzzer is fixedly connected to the top of each of the two infrared thermal imagers, and a control switch is fixedly connected to the top of the early warning platform and to one side of the infrared thermal imagers, and a display screen is fixedly connected to one side of each control switch.

[0009] In a preferred embodiment of the present invention, a fixing plate is installed on one side of the fan mounting bracket, and a second positioning bolt is threaded on the outer side of the fixing plate and extends to the inner wall of the side mounting cover. Valves are fixedly connected to the outer side of the air outlet pipe, and one end of the air outlet pipe passes through the fixing plate and extends into the inside of the fan mounting bracket.

[0010] In a preferred embodiment of the present invention, the internal detection mechanism includes a fixed frame and a movable placement slide. A fixed platform is fixedly connected to one side of the fixed baffle, and a movable placement slide is installed on the top of the fixed platform. A fixed frame is installed on the outer side of the movable placement slide, and the bottom of the fixed frame is fixedly connected to the fixed platform. An electric telescopic rod is fixedly connected to the top of the fixed frame, and a battery is fixedly connected to one side of the electric telescopic rod. A push rod is fixedly connected to the output end of the electric telescopic rod inside the fixed frame. A push plate is fixedly connected to the bottom of the push rod, and a limit seat is fixedly connected to the bottom of the push plate. A detection device is installed at the bottom of the limit seat. A battery is fixedly connected to one side of the electric telescopic rod. Limiting slides penetrating the top of the fixed frame are fixedly connected to all four sides of the top of the mounting partition. Limiting sleeves are fitted on the outer side of the limiting slides and on the top of the fixed frame.

[0011] In a preferred embodiment of the present invention, the side mounting cover has equidistantly distributed limiting grooves that are used to install multi-source sensing acquisition devices, and a handle is fixedly connected to one side of the auxiliary moving detection box and above the opening and closing plate.

[0012] In a preferred embodiment of the present invention, the top of the auxiliary mobile detection box is rotatably connected to a top sealing cover for use with the early warning platform, and both sides of the auxiliary mobile detection box are provided with casters.

[0013] In a preferred embodiment of the present invention, the early warning platform, display screen, control switch, infrared thermal imager, scanning sensor, buzzer, electric telescopic pole, detection equipment, multi-source sensing and acquisition equipment, discharge detection pin, current transformer and fan are all electrically connected to the control panel.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention features an internal detection mechanism and a fault detection mechanism. When the entire device is moved to one side of the switchgear, multiple discharge detection pins are gradually moved towards the switchgear until they act on the components to be detected, either outside or inside the switchgear. At this point, a buffer protection mechanism mitigates the force generated, using springs and dampers to buffer and absorb shocks. This protects the discharge detection pins and current transformers during detection, achieving full-area coverage detection and eliminating blind spots. Traditional switchgear detection is limited by fixed sensor positions, resulting in insufficient coverage of the top, bottom, and internal dead zones. This invention utilizes four adjustable fault detection mechanisms, combined with both contact and non-contact dual-mode data acquisition. Specifically targeting potential hazards such as localized leakage and concealed arc discharge; by integrating dust removal and detection, this invention eliminates environmental misjudgments. It integrates an intelligent surface treatment mechanism with scanning sensors to detect dust concentration, automatically activates fans, and performs directional dust removal in the exhaust duct; electrical testing is performed immediately after dust removal to eliminate environmental interference; this invention solves the problems of low coverage, equipment fragility, delayed response, and environmental interference in low-voltage switchgear fault detection. Universal wheels are used to drive the entire device for easy movement, until it is moved to one side of the switchgear for auxiliary testing. Two infrared thermal imagers are used to detect the temperature distribution on the exterior of the switchgear or exposed parts of the equipment, identifying any overheated components. When an overheated component is detected, a buzzer provides an on-site warning. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention. Figure One ; Figure 2 is a schematic diagram of the overall structure of the present invention. Figure Two ; Figure 3 is a schematic diagram of the internal structure of the auxiliary mobile detection box of the present invention; Figure 4 is an enlarged schematic diagram of the internal detection mechanism of the present invention; Figure 5 shows the appendix of this invention. Figure 2 Enlarged schematic diagram of the structure at point A in the diagram; Figure 6 is an appendix to the present invention. Figure 3 Enlarged schematic diagram of the structure at point B; Figure 7 is an appendix to the present invention. Figure 3 The overall structure topology diagram of the fault detection software.

[0016] In the picture: 1. Auxiliary mobile testing box; 11. Side mounting cover; 12. Opening and closing plate; 13. Casters; 14. Handle; 15. Top sealing cover; 16. Inner cavity; 2. Early warning platform; 21. Display screen; 22. Control switch; 23. Infrared thermal imager; 24. Scanning sensor; 25. Buzzer; 26. Control panel; 3. Fixed platform; 31. Fixed frame; 32. Electric telescopic rod; 33. Storage battery; 34. Limiting slide bar; 35. Detection equipment; 36. Limiting seat; 37. Push plate; 38. Limiting sleeve; 39. Push rod; 4. Moving and placing slide; 41. Limiting guide rail; 42. First positioning bolt; 5. Multi-source sensing and acquisition equipment; 51. Discharge detection pin; 52. Current transformer; 53. Limiting groove; 6. Fan mounting bracket; 61. Fixing plate; 62. Second positioning bolt; 63. Air outlet duct; 64. Valve; 7. Positioning plate; 71. Spring; 72. Shock absorber; 73. Protective pressure plate; 74. Positioning frame; 75. Third positioning bolt; 76. Fixed baffle; 77. Moving slide plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-7 This invention provides a technical solution: an intelligent fault detection device for low-voltage switchgear, comprising an auxiliary mobile detection box 1 and a fault detection mechanism. A side mounting cover 11 is fixedly connected to one side of the auxiliary mobile detection box 1. Four fault detection mechanisms are installed on the outside of the side mounting cover 11 at equal intervals. Each fault detection mechanism includes a multi-source sensor acquisition device 5 and discharge detection pins 51. The multi-source sensor acquisition device 5 is installed on the outside of the side mounting cover 11 at equal intervals. Symmetrically distributed discharge detection pins 51 are fixedly connected to the outside of the multi-source sensor acquisition device 5. Two current transformers 52 are installed between each two discharge detection pins 51. The discharge detection pins 51 and the current transformers 52 are used to monitor electrical parameters such as current and voltage in real time after actual contact with the switchgear, effectively detecting faults such as overload, short circuit, undervoltage, and harmonics. The detection by multiple sets of fault detection mechanisms at different heights can ensure the comprehensiveness of switchgear detection and prevent the situation where leakage in local locations is not detected in time. A surface treatment mechanism is provided on the outer side of the side mounting cover 11 and between every two adjacent fault detection mechanisms. The surface treatment mechanism includes a fan mounting bracket 6. Symmetrically distributed air outlet ducts 63 are installed on the outer side of the fan mounting bracket 6. The air outlet ducts 63 are used for air outlet. The auxiliary mobile detection box 1 is internally fixedly connected to a fixed baffle 76. An internal detection mechanism is installed on one side of the fixed baffle 76. The internal detection mechanism includes a fixed frame 31 and a movable placement slide 4. A fixed platform 3 is fixedly connected to one side of the fixed baffle 76. The movable placement slide 4 is installed on the top of the fixed platform 3. The fixed frame 31 is installed on the outside of the movable placement slide 4. The bottom of the fixed frame 31 is fixedly connected to the fixed platform 3. An electric telescopic rod 32 is fixedly connected to the top of the fixed frame 31. A battery 33 is fixedly connected to one side of the electric telescopic rod 32. The output end of the electric telescopic rod 32 extends... A push rod 39 is fixedly connected inside the fixed frame 31. A push plate 37 is fixedly connected to the bottom end of the push rod 39. A limit seat 36 is fixedly connected to the bottom of the push plate 37. A detection device 35 is installed at the bottom of the limit seat 36. When there are some detachable devices inside the switch cabinet, they can be disassembled and tested by the internal detection mechanism. An installation partition is provided between the detection device 35 and the limit seat 36. Therefore, the limit seat 36 can be installed at the bottom of the installation partition for easy disassembly during operation. The detection device 35 can be a fault recorder, power quality analyzer, or other equipment, which can be replaced as needed. The top of the auxiliary mobile detection box 1 is fixedly connected to an early warning platform 2, and the top of the early warning platform 2 is fixedly connected to a control panel 26. The top of the control panel 26 is fixedly connected to two symmetrically distributed infrared thermal imagers 23. The top of each infrared thermal imager 23 is fixedly connected to a buzzer 25. Each infrared thermal imager 23 is equipped with a scanning sensor 24. The two infrared thermal imagers 23 are used to detect the temperature distribution outside the switch cabinet or the exposed parts of the equipment, and to identify whether there are overheated components. When an overheated component is found, the buzzer 25 will provide an on-site warning. The warning temperature value of the buzzer 25 can be preset manually. The two scanning sensors 24 can be replaced as needed. The sensors include fiber optic sensors, temperature sensors, humidity sensors, and infrared sensors. They can be replaced according to the needs of the site, thereby improving the comprehensiveness of the detection. Both sides of the auxiliary mobile testing box 1 are equipped with casters 13, which are used to drive the entire equipment to move easily until it is moved to the side of the switch cabinet for auxiliary testing.

[0019] Please see Figures 1-7In this scheme, a buffer protection mechanism is installed on the other side of the fixed baffle 76, which is equidistantly distributed and used in conjunction with the corresponding multi-source sensing acquisition device 5. The auxiliary moving detection box 1 has an inner cavity 16 for installing the internal detection mechanism and the buffer protection mechanism. The buffer protection mechanism includes springs 71 and shock absorbers 72. The other side of the fixed baffle 76 is fixedly connected to equidistantly distributed positioning plates 7. Each positioning plate 7 has a spring 71 fixedly connected to one side, and each spring 71 has a shock absorber 72 installed inside. Each spring 71 has a protective pressure plate 73 fixedly connected to one side and the other side. A movable sliding plate is slidably connected to one side of the protective pressure plate 73 and inside the inner cavity 16. The plate 77 and the multi-source sensing acquisition device 5 are connected to the movable slide plate 77 on one side. The other side of the movable slide plate 77 is equipped with equidistantly distributed positioning frames 74. The positioning frames 74 are threaded with third positioning bolts 75 extending into the protective pressure plate 73. When the whole equipment is moved to the side of the switch cabinet, the multiple discharge detection pins 51 are aligned with the switch cabinet and moved step by step until they act on the parts that need to be detected outside or inside the switch cabinet. At this time, the buffer protection mechanism will protect the generated force through the spring 71 and the shock absorber 72, which will provide protection for the discharge detection pins 51 and the current transformer 52 during detection.

[0020] Please see Figures 1-7 In this scheme, a control switch 22 is fixedly connected to the top of the early warning platform 2 and to one side of the infrared thermal imager 23. A display screen 21 is fixedly connected to one side of the control switch 22. The control switch 22 is used to control the corresponding display screen 21 to start, and the display screen 21 is used to display and process data in real time.

[0021] Please see Figures 1-7 In this solution, a fixed plate 61 is installed on one side of the fan mounting bracket 6 at equal intervals. The outer side of the fixed plate 61 is threaded with a second positioning bolt 62 that is equally distributed and extends to the inner wall of the side mounting cover 11. Valves 64 are fixedly connected to the outer side of the air outlet duct 63. One end of the air outlet duct 63 passes through the fixed plate 61 and extends into the inside of the fan mounting bracket 6. Fans are installed inside the fan mounting bracket 6. The bottom of the fan mounting bracket 6 is provided with an air inlet slit for use with the fan. When the fan is running, the corresponding valve 64 is opened, and air is discharged through the air outlet duct 63 to perform surface dust removal and heat dissipation treatment on the switch cabinet that needs to be tested, reducing the possibility of misjudgment during subsequent testing. The fan mounting bracket 6 and the side mounting cover 11 are positioned and installed by the second positioning bolt 62, which facilitates quick disassembly and assembly of various surface treatment mechanisms during maintenance.

[0022] Please see Figures 1-7In this scheme, a battery 33 is fixedly connected to one side of the electric telescopic rod 32. Limiting slide rods 34 that penetrate the top of the fixed frame 31 are fixedly connected to the top of the mounting partition. Limiting sleeve plates 38 are fitted on the outer side of the limiting slide rods 34 and the top of the fixed frame 31. The top of the fixed platform 3 is provided with equidistantly distributed limiting guide rails 41. The inside of the limiting guide rails 41 is slidably connected to the mounting sliders. The top of the mounting sliders is connected to the bottom of the movable placement slide 4. The top of the fixed platform 3 is threaded with first positioning bolts 42 that extend to the inner wall of the auxiliary movable detection box 1. The first positioning bolts 42 are used to position and install the fixed platform 3 and the auxiliary movable detection box 1 to ensure the stability of the equipment during internal detection operations. When the push rod 39 slides, the sliding trajectory is limited by the four limiting slide rods 34 around the perimeter. On the one hand, this helps to prevent trajectory deviation in subsequent reset, and on the other hand, it limits the movement speed to a certain extent.

[0023] The early warning platform 2, display screen 21, control switch 22, infrared thermal imager 23, scanning sensor 24, buzzer 25, electric telescopic pole 32, battery 33, detection equipment 35, multi-source sensor acquisition device 5, discharge detection pin 51, current transformer 52, and fan are all electrically connected to the control panel 26. The control panel 26 is used to control the operation of the early warning platform 2, display screen 21, control switch 22, infrared thermal imager 23, scanning sensor 24, buzzer 25, electric telescopic pole 32, battery 33, detection equipment 35, multi-source sensor acquisition device 5, discharge detection pin 51, current transformer 52, and fan, realizing unified management of power equipment.

[0024] Infrared thermal imager 23, scanning sensor 24, and current transformer 52 measure corresponding environmental parameters, convert them into signals, and send them to control panel 26. Control panel 26 receives the signals, processes them, and generates corresponding control signals according to preset control algorithms.

[0025] Please see Figures 1-7 In this solution, the side mounting cover 11 has equidistantly distributed limiting grooves 53 that are used to install the multi-source sensor acquisition device 5. A handle 14 is fixedly connected to one side of the auxiliary moving detection box 1 and above the opening and closing plate 12. The handle 14 has anti-slip strips on the outside to facilitate manual pushing of the device. The anti-slip strips improve the anti-slip effect when manually pushing. The limiting grooves 53 inside the side mounting cover 11 facilitate the normal sliding of the multi-source sensor acquisition device 5.

[0026] The top of the auxiliary mobile detection box 1 is rotatably connected to a top sealing cover 15 for use with the early warning platform 2. Two symmetrically distributed hinges are provided at the connection between the top sealing cover 15 and the auxiliary mobile detection box 1. The hinges are equipped with hinge shafts and springs 71 inside, which are used to position the top sealing cover 15 after angle adjustment.

[0027] Please see Figures 1-7 In this solution, the fault detection device also includes a fault detection software, which is integrated into the early warning platform 2. The fault detection software is bidirectionally connected to the control panel 26. The fault detection software includes a multi-source sensing module, a switchgear autonomous monitoring module, a cloud early warning module, and a field calculation module. The outputs of the multi-source sensing module and the switchgear autonomous monitoring module are both connected to the input of the cloud early warning module. The field calculation module is integrated into the cloud early warning module.

[0028] The multi-source sensing module is used to acquire comprehensive data on the outside and inside of the switch cabinet through the infrared thermal imager 23, the scanning sensor 24, the discharge detection pin 51, and the current transformer 52. The switchgear autonomous monitoring module monitors in real time the voltage sensors, temperature sensors, vibration sensors and other devices installed inside the switchgear for auxiliary detection. The detection devices 35 can be added or removed as needed. The cloud-based early warning module is used to control the real-time operation of the early warning platform 2. Data is displayed in real time through the display screen 21, and early warning commands are issued on-site through the buzzer 25. The field calculation module is used to process various data acquired on-site and analyze existing and potential faults.

[0029] Please see Figures 1-7 The working principle of this invention is as follows: The discharge detection pin 51 and current transformer 52 are used to monitor electrical parameters such as current and voltage in real time after actual contact with the switchgear, effectively detecting faults such as overload, short circuit, undervoltage, and harmonics. Multiple fault detection mechanisms of varying heights ensure comprehensive switchgear detection, preventing undetected localized leakage. The exhaust duct 63 is used for ventilation. If there are removable devices inside the switchgear, they can be disassembled and inspected via internal detection mechanisms. A mounting partition is provided between the detection device 35 and the limit seat 36, allowing for easy disassembly during operation by installing the limit seat 36 at the bottom of the partition. The detection device 35 can be a fault recorder, power quality analyzer, or other equipment, and can be replaced as needed. Two infrared thermal... Imager 23 is used to detect the temperature distribution outside the switchgear or on exposed parts of the equipment, and to identify whether there are overheated components. When an overheated component is found, a buzzer 25 will provide an on-site warning. The warning temperature value of the buzzer 25 can be preset manually. The two scanning sensors 24 can be replaced as needed. The sensors include fiber optic sensors, temperature sensors, humidity sensors, and infrared sensors. The replacement is made according to the needs of the site, thereby improving the comprehensiveness of the detection. The casters 13 are used to drive the entire equipment to move easily until it is moved to the side of the switchgear for auxiliary detection. When the entire equipment is moved to the side of the switchgear, multiple discharge detection pins 51 are aligned with the switchgear and moved step by step until they are applied to the outside or inside of the switchgear for detection. The components are protected by a buffer protection mechanism. The generated force is buffered and damped by spring 71 and shock absorber 72, which provides protection for the discharge detection pin 51 and current transformer 52 during detection. The control switch 22 is used to control the corresponding display screen 21 to start, and the display screen 21 displays and processes data in real time. Each fan mounting bracket 6 has a fan installed inside. The bottom of each fan mounting bracket 6 has an air inlet slit for use with the fan. When the fan is running, the corresponding valve 64 is opened, and air is discharged through the air outlet duct 63 to clean the surface of the switch cabinet to be tested and dissipate heat, reducing the possibility of misjudgment during subsequent testing. The fan mounting bracket 6 and the side mounting cover 11 are positioned and installed by the second positioning bolt 62. For convenient and quick disassembly and assembly of various surface treatment mechanisms during maintenance, the fixed platform 3 and auxiliary mobile detection box 1 are positioned and installed using the first positioning bolt 42, ensuring the stability of the equipment during internal testing operations. When the push rod 39 slides, the sliding trajectory is limited by the four limiting slide rods 34 around its perimeter. This serves two purposes: firstly, to prevent trajectory deviation during subsequent reset, and secondly, to limit the movement speed to a certain extent. The control panel 26 is used to control the operation of the early warning platform 2, display screen 21, control switch 22, infrared thermal imager 23, scanning sensor 24, buzzer 25, electric telescopic rod 32, battery 33, detection equipment 35, multi-source sensor acquisition device 5, discharge detection pin 51, current transformer 52, and fan, realizing unified management of power equipment.Infrared thermal imager 23, scanning sensor 24, and current transformer 52 measure corresponding environmental parameters, convert them into signals, and send them to control panel 26. Control panel 26 receives and processes the signals, generating corresponding control signals according to a preset control algorithm. Anti-slip strips are provided on the outer side of handle 14 to facilitate manual movement of the equipment. The anti-slip strips improve the anti-slip effect when manually pushing. Limiting grooves 53 are provided inside the side mounting cover 11 to facilitate the normal sliding of the multi-source sensing acquisition device 5. Two symmetrically distributed hinges are provided at the connection between the top sealing cover 15 and the auxiliary moving detection box 1. The hinges contain hinge shafts and springs 71 for positioning the top sealing cover 15 after angle adjustment. The system includes a multi-source sensing module for acquiring comprehensive data from the outside and inside of the switchgear using an infrared thermal imager 23, scanning sensor 24, discharge detection pin 51, and current transformer 52. A switchgear autonomous monitoring module provides real-time monitoring of auxiliary detection devices such as voltage sensors, temperature sensors, and vibration sensors installed inside the switchgear; detection devices 35 can be added or removed as needed. A cloud-based early warning module controls the real-time operation of the early warning platform 2, displaying data in real-time on the screen 21 and issuing early warning commands via a buzzer 25. A field calculation module processes and calculates various data acquired on-site, analyzing existing and potential faults.

[0030] This invention achieves full-area coverage detection, eliminating blind spots and missed detections. Traditional switchgear detection is limited by fixed sensor positions, resulting in less than 70% coverage of the top, bottom, and internal dead corners. This invention uses four adjustable fault detection mechanisms, combined with contact (discharge detection pin 51 and current transformer 52) and non-contact (infrared thermal imager 23 and multi-source scanning sensor 24) dual-mode acquisition, to achieve 98% coverage of the switchgear surface and interior without dead corners, especially targeting hidden dangers such as local leakage and concealed arc discharge. Through integrated dust removal and detection, it eliminates environmental misjudgments. This invention integrates an intelligent surface treatment mechanism, scanning sensor 24 to detect dust concentration, automatic fan start-up, and directional dust removal in the exhaust duct. Electrical detection is performed immediately after dust removal to eliminate environmental interference. This invention solves the problems of low coverage, equipment vulnerability, slow response, and environmental interference in low-voltage switchgear fault detection.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-voltage switchgear intelligent fault detection device, comprising an auxiliary mobile detection box (1), characterized in that: A side mounting cover (11) is fixedly connected to one side of the auxiliary mobile detection box (1). A fault detection mechanism is installed on the outside of the side mounting cover (11) at equal intervals. There are four fault detection mechanisms, which are distributed vertically and vertically at equal intervals on the outside of the side mounting cover (11). The fault detection mechanism includes a multi-source sensor acquisition device (5). A multi-source sensor acquisition device (5) is installed on the outside of the side mounting cover (11) at equal intervals. A discharge detection pin (51) is fixedly connected to the outside of the multi-source sensor acquisition device (5). Two current transformers (52) are installed between each of the two discharge detection pins (51). A surface treatment mechanism is provided on the outside of the side mounting cover (11) and between every two adjacent fault detection mechanisms. The surface treatment mechanism includes a fan mounting bracket (6), and symmetrically distributed air outlet ducts (63) are installed on the outside of the fan mounting bracket (6). The auxiliary mobile detection box (1) is fixedly connected to a fixed baffle (76), and an internal detection mechanism is installed on one side of the fixed baffle (76). The top of the auxiliary mobile detection box (1) is fixedly connected to an early warning platform (2), and the top of the early warning platform (2) is fixedly connected to a control panel (26). The top of the control panel (26) is fixedly connected to two symmetrically distributed infrared thermal imagers (23), and scanning sensors (24) are installed inside the two infrared thermal imagers (23).

2. The intelligent fault detection device for low-voltage switchgear according to claim 1, characterized in that: On the other side of the fixed baffle (76), there is a buffer protection mechanism that is equidistantly distributed and used in conjunction with the corresponding multi-source sensor acquisition device (5). The buffer protection mechanism includes a spring (71) and a shock absorber (72). On the other side of the fixed baffle (76), there are equidistantly distributed positioning plates (7). On one side of each positioning plate (7), there are equidistantly distributed springs (71). Each spring (71) has a shock absorber (72) installed inside. On one side of each spring (71), there are protective pressure plates (73). On one side of each protective pressure plate (73), there is a sliding plate (77). One side of each multi-source sensor acquisition device (5) is connected to the sliding plate (77). On the other side of each sliding plate (77), there are equidistantly distributed positioning frames (74).

3. The intelligent fault detection device for low-voltage switchgear according to claim 2, characterized in that: A buzzer (25) is fixedly connected to the top of each of the two infrared thermal imagers (23), and a control switch (22) is fixedly connected to the top of the early warning platform (2) and to one side of the infrared thermal imager (23). A display screen (21) is fixedly connected to one side of the control switch (22).

4. The intelligent fault detection device for low-voltage switchgear according to claim 3, characterized in that: The fan mounting bracket (6) has equidistantly distributed fixing plates (61) installed on one side. The outer side of the fixing plate (61) is threaded with second positioning bolts (62) that are equidistantly distributed and extend to the inner wall of the side mounting cover (11). Valves (64) are fixedly connected to the outer side of the air outlet pipe (63). One end of the air outlet pipe (63) passes through the fixing plate (61) and extends into the inside of the fan mounting bracket (6).

5. The intelligent fault detection device for low-voltage switchgear according to claim 4, characterized in that: The internal detection mechanism includes a fixed frame (31) and a movable placement slide (4). A fixed platform (3) is fixedly connected to one side of the fixed baffle (76). A movable placement slide (4) is installed on the top of the fixed platform (3). A fixed frame (31) is installed on the outside of the movable placement slide (4). The bottom of the fixed frame (31) is fixedly connected to the fixed platform (3). An electric telescopic rod (32) is fixedly connected to the top of the fixed frame (31). A battery (33) is fixedly connected to one side of the electric telescopic rod (32). A push rod (39) is fixedly connected to the output end of the electric telescopic rod (32) inside the fixed frame (31). A push plate (37) is fixedly connected to the bottom end of the push rod (39). A limit seat (36) is fixedly connected to the bottom of the push plate (37). A detection device (35) is installed at the bottom of the limit seat (36). Limiting slides (34) that penetrate the top of the fixed frame (31) are fixedly connected to all four sides of the top of the mounting partition.

6. The intelligent fault detection device for low-voltage switchgear according to claim 4, characterized in that: The side mounting cover (11) has equidistantly distributed limiting grooves (53) that are installed in conjunction with the multi-source sensor acquisition device (5). A handle (14) is fixedly connected to one side of the auxiliary moving detection box (1) and above the opening and closing plate (12).

7. The intelligent fault detection device for low-voltage switchgear according to claim 1, characterized in that: The top of the auxiliary mobile detection box (1) is rotatably connected to a top sealing cover (15) used in conjunction with the early warning platform (2), and both sides of the auxiliary mobile detection box (1) are provided with casters (13).

8. The intelligent fault detection device for low-voltage switchgear according to claim 5, characterized in that: The warning platform (2), display screen (21), control switch (22), infrared thermal imager (23), scanning sensor (24), buzzer (25), electric telescopic pole (32), detection equipment (35), multi-source sensor acquisition device (5), discharge detection pin (51), current transformer (52) and fan are all electrically connected to the control panel (26).

9. The intelligent fault detection device for low-voltage switchgear according to claim 8, characterized in that: The fault detection device also includes a fault detection software terminal, which is bidirectionally connected to the control panel (26). The fault detection software terminal includes a multi-source sensing module, a switch cabinet autonomous monitoring module, a cloud early warning module, and a field calculation module.

10. The intelligent fault detection device for low-voltage switchgear according to claim 9, characterized in that: The multi-source sensing module is used to acquire comprehensive data on the outside and inside of the switch cabinet through an infrared thermal imager (23), a scanning sensor (24), a discharge detection pin (51), and a current transformer (52). The switchgear autonomous monitoring module performs real-time monitoring of devices such as voltage sensors, temperature sensors, and vibration sensors installed inside the switchgear for auxiliary detection. The cloud early warning module is used to control the real-time operation of the early warning platform (2); The on-site calculation module is used to perform calculations and processing on various data acquired on-site.

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