Intelligent insulation monitoring device for high-voltage inlet wire cabinet

Abstract

The utility model discloses an intelligent insulation monitoring device for a high-voltage inlet wire cabinet, which comprises an ultraviolet sensor, a single chip microcomputer and a display screen, a connecting piece is arranged on one side of the ultraviolet sensor, and the ultraviolet sensor is fixedly arranged on the inner wall of the high-voltage inlet wire cabinet through the connecting piece. The signal output end of the ultraviolet sensor is electrically connected to the signal input end of the single chip microcomputer through a wire, and the signal output end of the single chip microcomputer is electrically connected to the signal input end of the display screen through a wire. A plurality of groups of ultraviolet sensors are sequentially connected with a single chip microcomputer through wires, so that when ultraviolet rays irradiate the sensors, a series of physical and chemical changes can be caused, electric signals are generated and processed by the single chip microcomputer, and then the strength, frequency, duration and other characteristics of the electric signals can be checked through a display screen; whether arc light exists or not can be judged so as to determine whether an insulating substance is aged or not.

Description

Technical Field

[0001] The utility model relates to the technical field of insulation monitoring of high-voltage incoming switch cabinets, and particularly relates to an intelligent insulation monitoring device for high-voltage incoming switch cabinets. Background Technique

[0002] High-voltage incoming switch cabinets are usually important components in high-voltage power distribution systems. When electrical equipment operates, the heat generated by conductors or magnetic materials will be transferred to the insulating medium, and it will also generate heat due to its own losses. According to the heat resistance performance of the insulating medium, its operating temperature can be determined and divided into several heat resistance levels. Excessive temperature will cause thermal breakdown. Organic materials are prone to oxidation and decomposition at high temperatures, and their performance deteriorates. When the operating temperature exceeds the specified temperature, the insulating material will deteriorate rapidly and its lifespan will be greatly shortened.

[0003] At present, Chinese Patent No. CN207318652U discloses an on-line insulation fault monitoring system for high-voltage switch cabinets, which includes a plurality of ultraviolet sensing modules; each of the ultraviolet sensing modules is installed in an unobstructed monitoring area; an air suction pipe is arranged at each insulation monitoring point in the monitoring area; an air suction pipe in different monitoring areas is connected to the same air valve; the air valve is connected to an air suction fan through a pipeline; the air suction fan is connected to a gas analyzer; the ultraviolet sensing module is electrically connected to a digital processor through a signal comparator; the digital processor is connected to a monitoring processor through a first optocoupler circuit; the on-line insulation fault monitoring system for high-voltage switch cabinets of the utility model uses ultraviolet sensing modules to perform real-time detection of areas, has strong real-time detection and alarm, and accurately detects insulation fault points through a gas analyzer, with high detection accuracy.

[0004] The above on-line insulation fault monitoring system for high-voltage switch cabinets still has some problems in use. The above on-line insulation fault monitoring system for high-voltage switch cabinets uses ultraviolet sensing modules to perform real-time detection of areas, but the monitoring angle of the ultraviolet sensor is relatively limited. When monitoring multiple electrical components or cables at the same position in the cabinet, it is possible that the outer electrical components block the inner electrical components, resulting in monitoring dead angles, and it is not possible to monitor the electrical components or cables from other angles. Content of the Utility Model

[0005] The purpose of the utility model is to provide an intelligent insulation monitoring device for high-voltage incoming switch cabinets to solve the problems in the above background technique that the monitoring angle of the ultraviolet sensor is relatively limited, there may be monitoring dead angles when monitoring multiple electrical components or cables in the cabinet, and it is not possible to monitor the electrical components or cables from other angles.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An intelligent insulation monitoring device for a high-voltage incoming line cabinet, comprising an ultraviolet sensor, a single-chip microcomputer, and a display screen. A connecting piece is arranged on one side of the ultraviolet sensor. The ultraviolet sensor is fixedly installed on the inner wall of the high-voltage incoming line cabinet through the connecting piece. The signal output end of the ultraviolet sensor is electrically connected to the signal input end of the single-chip microcomputer through a wire, and the signal output end of the single-chip microcomputer is electrically connected to the signal input end of the display screen through a wire;

[0008] The connecting piece includes a suction cup adsorbed on the inner wall of the high-voltage incoming line cabinet. One side of the suction cup is fixedly connected with a connecting plate. One side of the connecting plate is fixedly connected with a fixing frame. A fixing piece for fixing the ultraviolet sensor is arranged in the inner cavity of the fixing frame.

[0009] Preferably, the fixing piece includes a guide rod fixedly installed between the upper and lower inner walls of the fixing frame. A clamping plate is slidably connected to the surface of the guide rod. The two sides of the clamping plate are respectively slidably connected to the corresponding inner walls of the fixing frame. A tension spring is sleeved on the surface of the guide rod. The two ends of the tension spring are respectively fixedly connected to the clamping plate and the inner wall surface of the bottom of the fixing frame.

[0010] Preferably, fixing plates are integrally formed at the tops of both sides of the connecting plate. A connecting ring is rotatably connected to the opposite ends of the two groups of fixing plates. The two groups of connecting rings are fixedly connected to the surface of the fixing frame. A limiting hole is formed in the surface of one of the fixing plates. A limiting block is slidably connected to the inner cavity of the limiting hole. One side of the limiting block is fixedly connected with a connecting rod. One end of the connecting rod sequentially passes through the two groups of connecting rings and the other fixing plate and is fixedly installed with an external thread. One end of the connecting rod is threadedly connected with a hand-tightening nut through the external thread.

[0011] Preferably, a limiting ring is arranged on the surface of the other fixing plate and on the outer circular surface of the connecting rod. One side of the limiting ring is fixedly connected with a limiting post. One end of the limiting post is inserted into the surface of the corresponding fixing frame. The hand-tightening nut is closely attached to the surface of the limiting ring.

[0012] Preferably, a guiding hole is formed in the surface of the connecting plate. A sliding block is slidably connected to the inner cavity of the guiding hole. One side of the sliding block is fixedly connected to the surface of the suction cup. A wedge-shaped hole is formed in the inner cavity of the sliding block. A wedge-shaped block is slidably inserted into the inner cavity of the wedge-shaped hole. A screw rod is rotatably connected to one side surface of the wedge-shaped block. One end of the screw rod passes through the surface of the connecting plate and is threadedly connected with a first nut. One side of the first nut is fixedly connected to the surface of the connecting plate.

[0013] Preferably, guiding grooves are formed on both the upper and lower sides of the guiding hole. A guiding block is slidably connected to the inner cavity of the guiding groove. The two groups of guiding blocks are respectively fixedly connected to the corresponding side surfaces of the sliding block.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. Through the setting of the connecting piece, the ultraviolet sensor of the utility model is fixedly adsorbed on the inner wall of a specific position of the high-voltage incoming line cabinet as required, so as to facilitate the monitoring of multiple electrical components or cables and reduce the occurrence of monitoring dead angles. Rotate the fixed frame as required to make the monitoring end of the ultraviolet sensor face a specific area, monitor the electrical components or cables from different angles, and tighten the hand-tightening nut to drive the limiting frame at one end of the connecting rod to move to one side and abut against the surface of the corresponding connecting ring on that side, which is convenient for fixing the fixed frame.

[0016] 2. Through the setting of the ultraviolet sensor, the single-chip microcomputer and the display screen, several groups of ultraviolet sensors are connected to the single-chip microcomputer in sequence by wires. Thus, when ultraviolet rays irradiate the sensor, a series of physical and chemical changes will be triggered, generating an electrical signal, which is processed by the single-chip microcomputer. Furthermore, the characteristics such as the intensity, frequency, and duration of the electrical signal can be viewed through the display screen, and it can be judged whether there is arc light, so as to determine whether there is aging of insulating substances in the high-voltage incoming line cabinet.

[0017] 3. Through the setting of the wedge-shaped block and the guiding hole, rotate the screw rod to push the wedge-shaped block at one end of the screw rod into the inner cavity of the wedge-shaped groove, and then push the sliding block to one side, thereby pulling the center of the suction cup outward at the same time, which is convenient for removing the suction cup. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the intelligent insulation monitoring device for the high-voltage incoming line cabinet of the utility model;

[0019] Figure 2 is a schematic structural diagram of the connecting plate of the utility model;

[0020] Figure 3 is an exploded structural diagram of the fixed frame of the utility model;

[0021] Figure 4 is a schematic structural diagram of the sliding block of the utility model.

[0022] In the figure: 100, high-voltage incoming line cabinet; 101, single-chip microcomputer; 102, display screen; 200, ultraviolet sensor; 201, connecting plate; 202, fixing frame; 203, suction cup; 300, fixing plate; 301, limiting hole; 302, external thread; 303, connecting rod; 304, limiting block; 305, hand-tightening nut; 306, limiting ring; 307, limiting column; 308, connecting ring; 400, first nut; 401, guiding hole; 402, guiding groove; 403, guiding block; 404, sliding block; 405, wedge-shaped hole; 406, wedge-shaped block; 407, screw rod; 500, clamping plate; 501, guiding rod; 502, tension spring. Detailed implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-4 , this embodiment provides an intelligent insulation monitoring device for a high-voltage incoming line cabinet, including an ultraviolet sensor 200, a single-chip microcomputer 101, and a display screen 102. A connecting piece is arranged on one side of the ultraviolet sensor 200. The ultraviolet sensor 200 is fixedly installed on the inner wall of the high-voltage incoming line cabinet 100 through the connecting piece. The signal output end of the ultraviolet sensor 200 is electrically connected to the signal input end of the single-chip microcomputer 101 through a wire, and the signal output end of the single-chip microcomputer 101 is electrically connected to the signal input end of the display screen 102 through a wire. Among them, the model of the ultraviolet sensor 200 is sg01d–5lens, and the model of the single-chip microcomputer 101 is STC89C51;

[0025] Among them, the connecting piece includes a suction cup 203 adsorbed on the inner wall of the high-voltage incoming line cabinet 100. One side of the suction cup 203 is fixedly connected with a connecting plate 201. One side of the connecting plate 201 is fixedly connected with a fixing frame 202. The inner cavity of the fixing frame 202 is provided with a fixing piece for fixing the ultraviolet sensor 200. The top of both sides of the connecting plate 201 is integrally formed with fixing plates 300. The opposite ends of the two groups of fixing plates 300 are rotatably connected with connecting rings 308. The two groups of connecting rings 308 are fixedly connected to the surface of the fixing frame 202. A limiting hole 301 is opened on the surface of one of the fixing plates 300. A limiting block 304 is slidably connected in the inner cavity of the limiting hole 301. One side of the limiting block 304 is fixedly connected with a connecting rod 303. One end of the connecting rod 303 sequentially penetrates through the two groups of connecting rings 308 and the other fixing plate 300 and is fixedly provided with an external thread 302. One end of the connecting rod 303 is threadedly connected with a hand-tightening nut 305 through the external thread 302. Through the setting of the connecting piece, it is convenient to fixedly adsorb the ultraviolet sensor 200 on the inner wall of a specific position of the high-voltage incoming line cabinet 100 as required, so as to monitor multiple electrical components or cables and reduce the occurrence of monitoring dead angles. Rotate the fixing frame 202 as required to make the monitoring end of the ultraviolet sensor 200 face a specific area, and monitor the electrical components or cables at different angles. And tighten the hand-tightening nut 305 to drive the limiting frame at one end of the connecting rod 303 to move towards one side and abut against the surface of the corresponding connecting ring 308, which is convenient to fix the fixing frame 202. And through the settings of the ultraviolet sensor 200, the single-chip microcomputer 101 and the display screen 102, a plurality of groups of ultraviolet sensors 200 are connected to the single-chip microcomputer 101 in sequence by wires. Thus, when ultraviolet rays irradiate the sensor, a series of physical and chemical changes will be caused, thereby generating an electrical signal, and the electrical signal is processed through the single-chip microcomputer 101. Furthermore, the characteristics such as the intensity, frequency and duration of the electrical signal can be viewed through the display screen 102, and it can be judged whether there is arc light, so as to determine whether there is aging of insulating substances in the high-voltage incoming line cabinet 100.

[0026] It is worth noting that for the working principle of the intelligent insulation monitoring of the high-voltage incoming line cabinet 100 by the ultraviolet sensor 200, refer to the on-line insulation fault monitoring system for high-voltage switch cabinets with the publication number CN207318652U, and their working principles are the same.

[0027] Among them, the ultraviolet sensor 200 measures the light energy caused by switch insulation discharge and load temperature to realize the monitoring of switch insulation defects. In the arc light detection based on ultraviolet detection, the principle is to use a specific ultraviolet sensor to sense the ultraviolet radiation generated by the arc light. These ultraviolet sensors usually contain materials sensitive to ultraviolet rays in a specific wavelength range. When ultraviolet rays irradiate the sensor, a series of physical and chemical changes will be caused, thereby generating an electrical signal.

[0028] Specifically, ultraviolet rays can excite electrons in the sensor material, causing them to transition from a low-energy state to a high-energy state, forming a change in current or voltage. By detecting and analyzing the characteristics of these electrical signals, such as intensity, frequency, and duration, it is possible to determine whether there is arc light and conduct insulation monitoring accordingly.

[0029] Furthermore, the fixing member includes a guide rod 501 fixedly installed between the inner walls on the upper and lower sides of the fixing frame 202. A clamping plate 500 is slidably connected to the surface of the guide rod 501. The two sides of the clamping plate 500 are respectively slidably connected to the corresponding inner walls of the fixing frame 202. A tension spring 502 is sleeved on the surface of the guide rod 501. The two ends of the tension spring 502 are respectively fixedly connected to the clamping plate 500 and the inner wall surface of the bottom of the fixing frame 202. Through the arrangement of the tension spring 502 and the clamping plate 500, the clamping plate 500 is pushed upward, and then the ultraviolet sensor 200 is placed between the clamping plate 500 and the fixing frame 202. Subsequently, the clamping plate 500 is released, and the clamping plate 500 moves downward under the pulling of the tension spring 502 to clamp and fix the ultraviolet sensor 200, thus being applicable to ultraviolet sensors 200 of different sizes.

[0030] Even further, a limit ring 306 is provided on the surface of the other fixing plate 300 and located on the outer cylindrical surface of the connecting rod 303. A limit post 307 is fixedly connected to one side of the limit ring 306. One end of the limit post 307 is inserted into the surface of the corresponding fixing frame 202. The hand-tightening nut 305 is closely attached to the surface of the limit ring 306. By tightening the hand-tightening nut 305, the limit ring 306 is closely attached to the surface of the fixing frame 202, thereby further fixing the fixing frame 202 and improving the stability of the fixing of the fixing frame 202.

[0031] It should be noted that a guide hole 401 is provided on the surface of the connecting plate 201. A sliding block 404 is slidably connected to the inner cavity of the guide hole 401. One side of the sliding block 404 is fixedly connected to the surface of the suction cup 203. A wedge-shaped hole 405 is provided in the inner cavity of the sliding block 404. A wedge-shaped block 406 is slidably inserted into the inner cavity of the wedge-shaped hole 405. One side surface of the wedge-shaped block 406 is rotatably connected to a screw rod 407. One end of the screw rod 407 penetrates through the surface of the connecting plate 201 and is threadedly connected to a first nut 400. One side of the first nut 400 is fixedly connected to the surface of the connecting plate 201. Through the arrangement of the wedge-shaped block 406 and the guide hole 401, by rotating the screw rod 407, the wedge-shaped block 406 at one end of the screw rod 407 is pushed into the inner cavity of the wedge-shaped groove, and then the sliding block 404 is pushed to one side, thereby simultaneously pulling the center of the suction cup 203 outward, facilitating the removal of the suction cup 203.

[0032] Preferably, guiding grooves 402 are formed on both the upper and lower sides of the guiding hole 401. The inner cavity of the guiding groove 402 is slidably connected with a guiding block 403. The two groups of guiding blocks 403 are respectively fixedly connected to the corresponding side surfaces of the sliding block 404 to limit the movement range of the sliding block 404.

[0033] Working principle;

[0034] First, push the clamping plate 500 upward. Then, place the ultraviolet sensor 200 between the clamping plate 500 and the fixed frame 202. Subsequently, release the clamping plate 500. The clamping plate 500 moves downward under the pulling force of the tension spring 502 to clamp and fix the ultraviolet sensor 200. Then, according to requirements, a plurality of groups of ultraviolet sensors 200 are respectively adsorbed on the inner wall of the high-voltage incoming line cabinet 100 through the suction cups 203. And loosen the hand-tightening nut 305, and rotate the fixed frame 202 to make the monitoring end of the ultraviolet sensor 200 face a specific electrical component. Then, tighten the hand-tightening nut 305 to drive the limiting frame at one end of the connecting rod 303 to move to one side and abut against the surface of the corresponding connecting ring 308, thereby fixing the fixed frame 202. When all the ultraviolet sensors 200 are installed, use wires to connect a plurality of groups of ultraviolet sensors 200 to the single-chip microcomputer 101 in sequence, so that it can be checked through the display screen 102 whether there is aging of insulating substances in the high-voltage incoming line cabinet 100. Further, when it is necessary to disassemble the ultraviolet sensor 200, rotate the screw rod 407 to push the wedge-shaped block 406 at one end of the screw rod 407 into the inner cavity of the wedge-shaped groove, and then push the sliding block 404 to one side, thereby pulling the center of the suction cup 203 outward at the same time, and then disassembling the suction cup 203. Then, it can be installed at the required position.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent insulation monitoring device for a high-voltage incoming line cabinet, characterized in that: The invention comprises an ultraviolet sensor (200), a single-chip microcomputer (101), and a display screen (102); a connecting piece is provided on one side of the ultraviolet sensor (200); the ultraviolet sensor (200) is fixedly mounted on the inner wall of a high-voltage incoming line cabinet (100) via the connecting piece; a signal output end of the ultraviolet sensor (200) is electrically connected to a signal input end of the single-chip microcomputer (101) via a wire; and the signal output end of the single-chip microcomputer (101) is electrically connected to a signal input end of the display screen (102) via a wire; The connecting piece comprises a suction cup (203) adsorbed on the inner wall of the high-voltage incoming line cabinet (100), one side of the suction cup (203) is fixedly connected to a connecting plate (201), one side of the connecting plate (201) is fixedly connected to a fixing frame (202), and the inner cavity of the fixing frame (202) is provided with a fixing piece for fixing the ultraviolet sensor (200).

2. The intelligent insulation monitoring device for a high-voltage incoming line cabinet according to claim 1, characterized in that: The fixing member comprises a guide rod (501) fixedly mounted between the upper and lower inner walls of the fixing frame (202); the surface of the guide rod (501) is slidably connected with a clamping plate (500); the two sides of the clamping plate (500) are respectively slidably connected to the inner wall of the corresponding side of the fixing frame (202); the surface of the guide rod (501) is sleeved with a tension spring (502); the two ends of the tension spring (502) are respectively fixedly connected to the clamping plate (500) and the inner wall surface of the bottom of the fixing frame (202).

3. The intelligent insulation monitoring device for a high-voltage incoming line cabinet according to claim 2 is characterized in that: The top of both sides of the connecting plate (201) are integrally formed with fixing plates (300), and the opposite ends of the two groups of fixing plates (300) are rotatably connected with connecting rings (308), and the two groups of connecting rings (308) are fixedly connected to the surface of the fixing frame (202), and a limiting hole (301) is provided on the surface of one side of the fixing plate (300), and the inner cavity of the limiting hole (301) is slidably connected to a limiting block (304), and one side of the limiting block (304) is fixedly connected with a connecting rod (303), and one end of the connecting rod (303) passes through the two groups of connecting rings (308) and the fixing plate (300) on the other side in sequence and is fixedly installed with an external thread (302), and one end of the connecting rod (303) is threadedly connected with a hand-tightened nut (305) through the external thread (302).

4. The intelligent insulation monitoring device for a high-voltage incoming line cabinet according to claim 3 is characterized in that: A limiting ring (306) is provided on the surface of the fixing plate (300) on the other side and on the outer circumferential surface of the connecting rod (303); one side of the limiting ring (306) is fixedly connected to a limiting column (307); one end of the limiting column (307) is plugged into the surface of the fixing frame (202) on the corresponding side; and the hand-tightening nut (305) is in close contact with the surface of the limiting ring (306).

5. The intelligent insulation monitoring device for a high-voltage incoming line cabinet according to claim 4 is characterized in that: The surface of the connecting plate (201) is provided with a guide hole (401), the inner cavity of the guide hole (401) is slidably connected to a sliding block (404), one side of the sliding block (404) is fixedly connected to the surface of the suction cup (203), the inner cavity of the sliding block (404) is provided with a wedge-shaped hole (405), the inner cavity of the wedge-shaped hole (405) is slidably inserted with a wedge-shaped block (406), one side of the surface of the wedge-shaped block (406) is rotatably connected to a screw rod (407), one end of the screw rod (407) passes through the surface of the connecting plate (201) and is threadedly connected to a first nut (400), one side of the first nut (400) is fixedly connected to the surface of the connecting plate (201).

6. The intelligent insulation monitoring device for a high-voltage incoming line cabinet according to claim 5 is characterized in that: The guide hole (401) is provided with guide grooves (402) on both the upper and lower sides, and the inner cavity of the guide groove (402) is slidably connected with a guide block (403), and two groups of the guide blocks (403) are respectively fixedly connected to the corresponding side surface of the sliding block (404).

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