On-line monitoring device for partial discharge of transformer

Abstract

The utility model discloses a transformer partial discharge on-line monitoring device, and relates to the field of transformer detection. A transformer partial discharge on-line monitoring device comprises a master control cabinet, a cabinet door is rotatably connected to an opening of the master control cabinet, a partial discharge on-line monitor is installed in the master control cabinet through a support, air inlets are symmetrically formed in the lower ends of the two sides of the master control cabinet, heat dissipation fans are installed in the air inlets, and the heat dissipation fans are installed in the air inlets. Exhaust net openings are symmetrically formed in the upper ends of the two sides of the main control cabinet, and the air inlet pipe is fixedly connected to the outer wall of the main control cabinet through bolts and communicates with the air inlet; the dust filtering screen plate is mounted at the air outlet end of the air inlet pipe; according to the utility model, by arranging the smoke sensor, the gas storage tank, the electrified magnet and other parts, the online partial discharge monitor can quickly respond and release inert gas to extinguish fire when smoke is detected, thereby effectively avoiding the damage caused by fire, and reducing the economic loss.

Description

TECHNICAL FIELD

[0001] The utility model belongs to transformer detection technical field, specifically, relate to a kind of transformer partial discharge on-line monitoring device. BACKGROUND

[0002] Transformer partial discharge on-line monitoring device is used to monitor the partial discharge value and position of large power transformer and other high-voltage electrical equipment under operation state, which plays a very important role in ensuring the reliable operation of high-voltage electrical equipment. The partial discharge on-line monitoring device generally consists of a main power supply, a partial discharge monitoring unit, a remote communication unit, an ultrasonic sensor, an ultrasonic sensor power supply unit and a wideband current transformer. Among them, the main power supply, the partial discharge instrument, the remote communication unit and the ultrasonic sensor power supply unit are installed in the main control cabinet. The ultrasonic sensor is fixed on the wall of the monitored transformer. The wideband current transformer is installed on the power transformer core grounding wire.

[0003] At present, the existing transformer partial discharge on-line monitoring device is usually equipped with a cooling system, which can cool the instruments in the main control cabinet to maintain their normal working temperature. However, this type of device has obvious safety hazards. When the instruments in the main control cabinet catch fire due to high temperature, short circuit or other problems, the existing device cannot quickly extinguish the fire. If the fire cannot be extinguished in time, not only will the entire monitoring device be damaged, affecting the monitoring of the transformer, but also more serious power accidents may occur, causing huge economic losses. In view of this, the utility model is proposed. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a transformer partial discharge on-line monitoring device that can overcome the above problems or at least partially solve the above problems.

[0005] The utility model discloses a basic thought of technical scheme is: a kind of transformer partial discharge on-line monitoring device, including main control cabinet, the opening of main control cabinet is rotatably connected with cabinet door, local discharge on-line monitor is installed in the main control cabinet by support, the lower end of the both sides of main control cabinet is symmetrically provided with air inlet, and heat dissipation fan is installed in air inlet, the upper end of the both sides of main control cabinet is symmetrically provided with exhaust mesh, further including: air inlet pipe, by bolt fixed connection on the outer wall of main control cabinet, and with air inlet is connected;Dust screen, install in the air outlet of air inlet pipe;Sealing plate, by rotating shaft rotatably connected in the air inlet of air inlet pipe;With energizing magnet, by support fixed connection in the upper end of air inlet pipe;With energizing magnet cooperation uses magnetic plate, and inlay installation is in the sealing plate;Gas tank that inert gas is stored in the inside, set up on the air inlet pipe, and the air inlet pipe is provided with the through hole that is connected with the gas outlet of gas tank;Plug, set up in the position of gas tank in close proximity to gas outlet;Support, fixed connection is in the gas tank;Tension spring, fixed connection is in the lower end of support, and the lower end of tension spring is fixedly connected with plug;Fixed connection has pull rope between plug and sealing plate;Smoke sensor, fixed installation is in the inside upper end of main control cabinet.

[0006] In order to facilitate the resistance of pull rope movement, so that the plug can move up and down more smoothly, further, the air inlet pipe and the sealing plate are rotatably connected with the rope wheel on the support, and the pull rope is wound on the rope wheel.

[0007] In order to facilitate the close fit between the sealing plate and the air inlet pipe, reduce the entry of air, further, the air inlet pipe and the sealing plate are inlaid with magnetic strips, and the two magnetic strips are magnetically attracted to each other.

[0008] In order to facilitate the more stable up and down movement of the plug, further, the support is slidably connected with a guide rod, and the lower end of the guide rod is fixedly connected with the plug.

[0009] In order to facilitate the quick disassembly and assembly of the gas tank, further, the tank opening end of the gas tank and the through hole of the air inlet pipe are detachably connected by threads.

[0010] In order to facilitate the improvement of the stability of the gas tank, further, the side wall of the main control cabinet is fixedly connected with a limiting sleeve ring sleeved on the outside of the gas tank.

[0011] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: by setting the smoke sensor, gas tank, energizing magnet and other components, the utility model can quickly respond when detecting smoke, release inert gas to extinguish fire, effectively avoid the damage of local discharge on-line monitor caused by fire, and reduce economic loss.

[0012] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0013] In the drawings:

[0014] Figure 1 is a structural schematic view of the present application;

[0015] Figure 2 is a structural schematic view of the inside of the main control cabinet of the present application Figure 1 ;

[0016] Figure 3 is a structural schematic view of the inside of the main control cabinet of the present application Figure 2 ;

[0017] Figure 4 is a sectional view of part of the structure of the present application.

[0018] In the drawings: 1, main control cabinet; 101, cabinet door; 102, partial discharge on-line monitor; 103, air inlet; 104, exhaust mesh opening; 105, cooling fan; 106, limiting collar; 2, air inlet pipe; 201, dust filter screen plate; 202, sealing plate; 203, magnetic strip; 204, rope wheel; 205, magnetic plate; 206, energized magnet; 3, gas storage tank; 301, plug; 302, support; 303, tension spring; 304, guide rod; 305, pull rope; 4, smoke sensor. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and the following embodiments are used to illustrate the present application, but not to limit the scope of the present application. EMBODIMENT

[0020] Referring to Figures 1-4The utility model provides a kind of transformer partial discharge on-line monitoring device, including main control cabinet 1, cabinet door 101 is rotatably connected at the opening of main control cabinet 1, local discharge on-line monitor 102 is installed in main control cabinet 1 by support, the lower end of the both sides of main control cabinet 1 is symmetrically provided with air inlet 103, heat dissipation fan 105 is installed in air inlet 103, the upper end of the both sides of main control cabinet 1 is symmetrically provided with exhaust screen opening 104, further include: air inlet pipe 2 is fixedly connected on the outer wall of main control cabinet 1 by bolt, and it is communicated with air inlet 103;Dust screen plate 201 is installed at the gas outlet end of air inlet pipe 2;Sealing plate 202 is rotatably connected at the gas inlet end of air inlet pipe 2 by pivot;With electromagnet 206, it is fixedly connected on the upper end of air inlet pipe 2 by support rod;Magnetic plate 205 is used in conjunction with electromagnet 206, and it is embeddedly installed on sealing plate 202;Gas storage tank 3 that stores inert gas is arranged on air inlet pipe 2, and through hole is formed on air inlet pipe 2 and communicated with the gas outlet of gas storage tank 3;Plug 301 is arranged in gas storage tank 3 and close to the position of gas outlet;Support 302 is fixedly connected in gas storage tank 3;Tension spring 303 is fixedly connected at the lower end of support 302, and the lower end of tension spring 303 is fixedly connected with plug 301;Pull rope 305 is fixedly connected between plug 301 and sealing plate 202;Smoke sensor 4 is fixedly installed at the upper end of the inside of main control cabinet 1.

[0021] When the utility model partial discharge on-line monitoring device works, under normal condition, heat dissipation fan 105 in the air inlet 103 of the lower end of the both sides of main control cabinet 1 operates, and external air enters main control cabinet 1 through air inlet pipe 2 and dust screen plate 201, and the local discharge on-line monitor 102 is cooled, and hot air is discharged from the exhaust screen opening 104 of the upper end of the both sides of main control cabinet 1.

[0022] When local discharge on-line monitor 102 in main control cabinet 1 smokes because of high temperature, short circuit and other problems, smoke sensor 4 at the upper end of the inside of main control cabinet 1 detects smoke signal and transmits it to controller, and after receiving the signal, controller deenergizes electromagnet 206, and electromagnet 206 loses magnetism and no longer attracts magnetic plate 205 on sealing plate 202, at this time, plug 301 in gas storage tank 3 moves up under the tension of tension spring 303, opens the tank opening of gas storage tank 3, and the stored inert gas is released, and at the same time, sealing plate 202 is downwardly rotated under the traction of pull rope 305 and the gravity of sealing plate 202, and the gas inlet port of air inlet pipe 2 is blocked, external air is prevented from entering, the released inert gas enters main control cabinet 1 under the action of heat dissipation fan 105 and rapidly diffuses, and local discharge on-line monitor 102 is wrapped up, and the situation of fire is avoided from further deterioration by reducing oxygen concentration and other ways, and at the same time, controller sends alarm signal to monitoring center, so that staff can quickly de-energize and overhaul local discharge on-line monitor 102.

[0023] The prior art can achieve the cooling effect on the partial discharge on-line monitoring instrument 102 in the main control cabinet 1, but when the host is on fire due to high temperature, short circuit and the like, it cannot quickly extinguish the fire. The device can quickly respond when detecting the smoke condition, release inert gas to extinguish the fire, effectively avoid damage to the partial discharge on-line monitoring instrument 102 due to the fire, reduce economic losses, and at the same time, timely alarm is sent to the monitoring center, which is convenient for the staff to quickly respond and maintain the equipment, ensures the normal operation of the transformer partial discharge on-line monitoring work, and improves the safety and reliability of the monitoring device.

[0024] It should be noted that the inert gas stored in the gas storage tank 3 is xenon gas. Xenon gas is an inert gas, which is chemically inert, non-combustible and non-supporting combustion. In the process of extinguishing the fire, it can quickly fill the combustion space, dilute the combustion-supporting gas such as oxygen, so that the combustion is extinguished due to lack of oxygen, and the xenon gas will not leave any residue after extinguishing the fire, and will not cause pollution and damage to the equipment and instruments. Embodiment

[0025] With reference to Figures 1-4 The gas inlet pipe 2 and the sealing plate 202 are rotatably connected with a rope wheel 204 through a support, the rope 305 is wound on the rope wheel 204, and the rope wheel 204 is arranged to reduce the resistance when the rope 305 moves, so that the block 301 can move up and down more smoothly.

[0026] The pipe opening of the gas inlet pipe 2 and the sealing plate 202 are both embedded with magnetic strips 203, and the two magnetic strips 203 are magnetically attracted to each other. When the sealing plate 202 is attached to the gas inlet pipe 2, the sealing plate 202 and the gas inlet pipe 2 can be tightly attached, which not only reduces the entry of air, but also avoids the waste of inert gas caused by the opening of the sealing plate 202 under the impact of the inert gas after the inert gas enters the gas inlet pipe 2, so as to make full use of the inert gas.

[0027] The support 302 is slidably connected with a guide rod 304, and the lower end of the guide rod 304 is fixedly connected with the block 301. The guide rod 304 is arranged to limit and guide the block 301, so that the block 301 can only move vertically, and when the block 301 seals the tank opening of the gas storage tank 3, the block 301 can fully seal the tank opening of the gas storage tank 3 to avoid leakage of inert gas. Embodiment

[0028] With reference to Figures 1-4The transformer partial discharge on-line monitoring device is basically same with the embodiment 2, and further, the tank opening end of the gas storage tank 3 is detachably connected with the through opening of the gas inlet pipe 2 through thread, and the quick dismounting between the gas storage tank 3 and the gas inlet pipe 2 can be realized by thread connecting between the gas storage tank 3 and the gas inlet pipe 2.

[0029] The side wall of the main control cabinet 1 is fixedly connected with the limiting sleeve ring 106 sleeved outside the gas storage tank 3, and the stability of the gas storage tank 3 can be improved when the gas storage tank 3 is installed on the gas inlet pipe 2 through the setting of the limiting sleeve ring 106.

[0030] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application in any form, although the present application has been disclosed as above with the preferred embodiments, however, it is not intended to limit the present application.

Claims

1. A transformer partial discharge on-line monitoring device, characterized by, The utility model provides a partial discharge on -line monitoring instrument, it includes master control cabinet (1), the opening of master control cabinet (1) is rotatably connected with cabinet door (101), is installed with partial discharge on -line monitoring instrument (102) through support in master control cabinet (1), the lower end of both sides of master control cabinet (1) is opened with air inlet (103) symmetry, air inlet (103) is installed with heat dissipation fan (105), the upper end of both sides of master control cabinet (1) is opened with exhaust mesh mouth (104) symmetry, still include: Air inlet pipe (2) is fixedly connected on the outer wall of master control cabinet (1) by bolt, and with air inlet (103) is connected, Dust screen plate (201) is installed at the air outlet end of air inlet pipe (2), Sealing plate (202) is rotatably connected at the air inlet end of air inlet pipe (2) through pivot, Power magnet (206) is fixedly connected at the upper end of air inlet pipe (2) through support rod, Magnetic plate (205) is used in cooperation with power magnet (206) and is embeddedly installed on sealing plate (202), Gas storage tank (3) that stores inert gas internally is arranged on air inlet pipe (2), and air inlet pipe (2) is provided with a through hole that is connected with the gas outlet of gas storage tank (3), Plug block (301) is arranged in the position close to the gas outlet in gas storage tank (3), Support (302) is fixedly connected in gas storage tank (3), Tension spring (303) is fixedly connected at the lower end of support (302), and the lower end of tension spring (303) is fixedly connected with plug block (301), Pull rope (305) is fixedly connected between plug block (301) and sealing plate (202), Smoke sensor (4) is fixedly installed at the upper end of the inside of master control cabinet (1).

2. The transformer partial discharge on-line monitoring device according to claim 1, characterized in that, Rope wheel (204) is rotatably connected on air inlet pipe (2) and sealing plate (202) through support, 3. The transformer partial discharge on-line monitoring device according to claim 1, characterized in that, Magnetic stripe (203) is embeddedly installed on the pipe opening of air inlet pipe (2) and sealing plate (202), and two magnetic stripes (203) are mutually magnetically attracted.

4. The transformer partial discharge on-line monitoring device according to claim 1, characterized in that, Guide rod (304) is slidably connected on support (302), and the lower end of guide rod (304) is fixedly connected with plug block (301).

5. The transformer partial discharge on-line monitoring device according to claim 1, characterized in that, The tank opening end of gas storage tank (3) and the through hole of air inlet pipe (2) are detachably connected through screw thread.

6. The transformer partial discharge on-line monitoring device according to claim 5, characterized in that, Limiting sleeve ring (106) is fixedly connected on the lateral wall of master control cabinet (1) and is sleeved on the outside of gas storage tank (3).

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