An explosion-proof detection device and method for electrical distribution cabinets

Abstract

This invention discloses an explosion-proof detection device and method for a power distribution cabinet, comprising a micro-smoke detector, a partial discharge detector, and a contact thermometer. The micro-smoke detector, partial discharge detector, and contact thermometer are electrically connected to a power supply via wires. The micro-smoke detector, partial discharge detector, and contact thermometer are respectively installed inside the top of the cabinet. The micro-smoke detector, partial discharge detector, and contact thermometer are connected to a processor via wires, and an alarm is connected to the processor.

Description

Technical Field

[0001] This invention belongs to the technical field of fire early warning for power distribution cabinets, and specifically relates to a fireproof detection device and method for power distribution cabinets. Background Technology

[0002] High-voltage switchgear contains many components, such as high-voltage cables covered with insulating sheaths. If the cables generate heat due to increased current, microparticles will sublimate from the heated insulating sheath. Detecting these microparticles can reveal overheating issues in the cables. Because the heating process is gradual, detecting these microparticles at extremely low concentrations allows for early detection and provides valuable time for troubleshooting. Secondly, the primary component of high-voltage switchgear, the PT transformer, is prone to overheating during operation due to long-term use and manufacturing processes, potentially leading to combustion. Since the transformer contains coils covered with solid insulation, the heating of these coils causes sublimation on the insulating material surface. Detecting microparticles can also detect this problem.

[0003] Partial discharge, caused by long-term changes in the insulation properties of various high-voltage equipment within the high-voltage switchgear, is also a type of fault in high-voltage switchgear. Effective detection of partial discharge can promptly identify the condition of the internal operating equipment.

[0004] Conventional high-voltage switchgear testing involves measuring the temperature of the switch contacts, which allows for timely detection of problems. Summary of the Invention

[0005] One of the objectives of this invention is to provide an explosion-proof and fire-resistant detection device for power distribution cabinets, in order to solve the aforementioned problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts one of the following technical solutions: an explosion-proof detection device for a power distribution cabinet, comprising a micro-smoke detector, a partial discharge detector, and a contact thermometer, wherein the micro-smoke detector, the partial discharge detector, and the contact thermometer are electrically connected to a power supply via wires, the micro-smoke detector, the partial discharge detector, and the contact thermometer are respectively installed inside the top of the cabinet, and the micro-smoke detector, the partial discharge detector, and the contact thermometer are connected to a processor via wires, wherein an alarm is connected to the processor.

[0007] Preferably, the micro-smoke detector uses the scattering effect of smoke particles on light to detect fire smoke; when a fire occurs, tiny particles in the smoke enter the sensing chamber of the smoke detector, and these particles scatter the light emitted from inside the detector; when the intensity of the scattered light reaches a certain level, the smoke detector will issue an alarm to remind people to take timely countermeasures.

[0008] Preferably, the partial discharge detector refers to the discharge phenomenon that occurs only in a local area in high-voltage electrical equipment, usually inside or on the surface of the insulator; this discharge only causes a local short circuit between conductors and does not form a conductive path; partial discharge has a certain impact on the insulating medium. Slight partial discharge has little impact on the equipment, but strong partial discharge will rapidly reduce the insulation strength and may eventually lead to insulation breakdown and flashover.

[0009] Preferably, the contact temperature measuring instrument includes a bimetallic thermometer, an expansion liquid pressure thermometer, a quartz crystal sensor, a non-contact radiation temperature sensor, and an RTD temperature sensor. The bimetallic thermometer is an indicator for testing temperature, composed of metal plates with different coefficients of thermal expansion and a linkage gear system. The expansion liquid pressure thermometer relies on a volatile liquid that vaporizes upon heating, generating pressure that is transmitted to the indicator via a capillary tube.

[0010] To achieve the above objectives, the present invention adopts the following second technical solution: a method for detecting micro smoke in a power distribution cabinet, wherein A, when there is smoke, the micro smoke detector transmits a signal to the processor, and the processor transmits an execution signal to the alarm. B. When there is a partial leakage current, the partial discharge detector will transmit the signal to the processor, and the processor will transmit the execution signal to the alarm. C. When the temperature inside the cabinet is too high, the contact temperature sensor will transmit a signal to the processor, and the processor will transmit an execution signal to the alarm. Beneficial effects

[0011] This patent provides effective protection for high-voltage switchgear through contact temperature measurement, micro-smoke detection, and partial discharge detection. Currently, temperature measurement and partial discharge detection are independent systems, and micro-smoke detection is a novel technology. If these operate independently, they cannot comprehensively and effectively detect high-voltage switchgear. Therefore, this patent integrates contact temperature measurement and partial discharge sensors into a single device, combining the other two detection methods into a single unit. Various data are transmitted wirelessly to an external host unit, and comprehensive data analysis enables the high-voltage switchgear to achieve explosion-proof and flame-retardant protection. Attached Figure Description

[0012] Figure 1 This is an electrical connection diagram of the present invention. Detailed Implementation

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention. Example

[0014] refer to Figure 1 An explosion-proof detection device for a power distribution cabinet includes a micro-smoke detector, a partial discharge detector, and a contact thermometer. The micro-smoke detector, partial discharge detector, and contact thermometer are electrically connected to a power source via wires. The micro-smoke detector, partial discharge detector, and contact thermometer are respectively installed inside the top of the cabinet. The micro-smoke detector, partial discharge detector, and contact thermometer are connected to a processor via wires, and an alarm is connected to the processor.

[0015] Micro-smoke detectors use the scattering of light by smoke particles to detect fire smoke. When a fire occurs, tiny particles in the smoke enter the sensing chamber of the smoke detector, and these particles scatter the light emitted from inside the detector. When the intensity of the scattered light reaches a certain level, the smoke detector will sound an alarm to remind people to take timely countermeasures.

[0016] Partial discharge detectors refer to discharge phenomena that occur only in localized areas of high-voltage electrical equipment, usually inside or on the surface of insulators. This type of discharge only causes localized short circuits in the insulation between conductors without forming a conductive path. Partial discharge has a certain impact on the insulating medium. Slight partial discharge has little impact on the equipment, but strong partial discharge can rapidly reduce the insulation strength, which may eventually lead to insulation breakdown and flashover.

[0017] The contact thermometer includes a bimetallic thermometer, an expansion liquid pressure thermometer, a quartz crystal sensor, a non-contact radiation temperature sensor, and an RTD temperature sensor. The bimetallic thermometer is an indicator for testing temperature, composed of metal plates with different coefficients of thermal expansion and a linkage gear system. The expansion liquid pressure thermometer relies on a volatile liquid that vaporizes upon heating, generating pressure that is transmitted to the indicator via a capillary tube.

[0018] This patent provides effective protection for high-voltage switchgear through contact temperature measurement, micro-smoke detection, and partial discharge detection. Currently, temperature measurement and partial discharge detection are independent systems, and micro-smoke detection is a novel technology. If these operate independently, they cannot comprehensively and effectively detect high-voltage switchgear. Therefore, this patent integrates contact temperature measurement and partial discharge sensors into a single device, combining the other two detection methods into a single unit. Various data are transmitted wirelessly to an external host unit, and comprehensive data analysis enables the high-voltage switchgear to achieve explosion-proof and flame-retardant protection. Example

[0019] A method for detecting micro-smoke in a power distribution cabinet: A. When there is smoke, the micro-smoke detector transmits a signal to the processor, and the processor transmits an execution signal to the alarm. B. When there is a partial leakage current, the partial discharge detector will transmit the signal to the processor, and the processor will transmit the execution signal to the alarm. C. When the temperature inside the cabinet is too high, the contact temperature sensor will transmit a signal to the processor, and the processor will transmit an execution signal to the alarm.

[0020] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A power distribution cabinet explosion-proof detection device, characterized in that: It includes a micro-smoke detector, a partial discharge detector, and a contact thermometer. The micro-smoke detector, partial discharge detector, and contact thermometer are electrically connected to a power source via wires. The micro-smoke detector, partial discharge detector, and contact thermometer are respectively installed inside the top of the cabinet. The micro-smoke detector, partial discharge detector, and contact thermometer are connected to a processor via wires. An alarm is connected to the processor.

2. The micro-smoke detection device for a power distribution cabinet according to claim 1, characterized in that: The micro-smoke detector uses the scattering effect of smoke particles on light to detect fire smoke. When a fire occurs, tiny particles in the smoke enter the sensing chamber of the smoke detector, and these particles scatter the light emitted from inside the detector. When the intensity of the scattered light reaches a certain level, the smoke detector will sound an alarm to remind people to take timely countermeasures.

3. The micro-smoke detection device for a power distribution cabinet according to claim 2, characterized in that: The partial discharge detector refers to the discharge phenomenon that occurs only in local areas of high-voltage electrical equipment, usually inside or on the surface of the insulator. This discharge only causes a local short circuit between conductors and does not form a conductive path. Partial discharge has a certain impact on the insulating medium. Slight partial discharge has little impact on the equipment, but strong partial discharge will rapidly reduce the insulation strength and may eventually lead to insulation breakdown and flashover.

4. The micro-smoke detection device for a power distribution cabinet according to claim 3, characterized in that: The contact temperature measuring instrument includes a bimetallic thermometer, an expansion liquid pressure thermometer, a quartz crystal sensor, a non-contact radiation temperature sensor, and an RTD temperature sensor. The bimetallic thermometer is an indicator for testing temperature, composed of metal plates with different coefficients of thermal expansion and a linkage gear system. The expansion liquid pressure thermometer relies on a volatile liquid that vaporizes upon heating, generating pressure that is transmitted to the indicator via a capillary tube.

5. A method for detecting micro-smoke in a power distribution cabinet, characterized in that: A. When there is smoke, the micro-smoke detector transmits a signal to the processor, and the processor transmits an execution signal to the alarm. B. When there is a partial leakage current, the partial discharge detector will transmit the signal to the processor, and the processor will transmit the execution signal to the alarm. C. When the temperature inside the cabinet is too high, the contact temperature sensor will transmit a signal to the processor, and the processor will transmit an execution signal to the alarm.

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