Transformer with fire extinguishing device

Abstract

The invention relates to the technical field of transformers, and discloses a transformer with a fire extinguishing device.The transformer comprises a transformer body and a power transformer used in a power system, and an oil tank is arranged in the transformer body and used for storing oil to cool the transformer body; the square sliding rod is driven to move away from the limiting protruding block through movement of the pressed plate, the limiting rolling wheel at the end of the square sliding rod rolls and slides out of the lower surface of the limiting protruding block, at the moment, limiting of the sliding sleeve is relieved, and then the sliding sleeve slides downwards along the limiting sliding rod under the gravity of the oil conservator; by means of the device, when the two fire extinguishing tanks enter the fire extinguishing process, the oil conservator can be away from the transformer body in time, spontaneous combustion caused by temperature rise of oil in the oil conservator due to a fire is avoided, and therefore the damage risk of the transformer body and surrounding equipment is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and in particular to a transformer with a fire extinguishing device. Background Art

[0002] Oil-immersed transformers are widely used in power systems. Their key feature is the use of oil as both an insulating and cooling medium. They typically consist of a transformer body, an oil tank, an oil pillow, and ancillary equipment. The core components—the transformer core and windings—are immersed in insulating oil. The oil not only provides insulation but also dissipates heat generated by the current, ensuring the transformer operates within a safe temperature range. To ensure smooth oil flow from the oil pillow into the transformer during operation, the oil pillow is located above the oil-immersed transformer. If an oil-immersed transformer is overloaded for extended periods, the oil tank can overheat, potentially causing a fire. A fire in an oil-immersed transformer typically occurs in two stages: a primary explosion (tank rupture), in which the insulating oil (mineral oil) decomposes under the action of an electric arc into a hydrocarbon mixture of hydrogen (H2), methane (CH4), ethylene (C2H4), and acetylene (C2H2). This rapid expansion causes a sharp increase in internal pressure. When the internal pressure exceeds the mechanical strength limit of the tank, the tank ruptures (primary explosion), releasing large amounts of high-temperature oil mist, gas, and liquid insulating oil. A secondary explosion (gas mixture explosion) occurs, in which the gaseous hydrocarbon mixture (such as methane and acetylene) released from the primary explosion mixes with air and reaches its explosive limit (for example, the explosive limit of methane is 5% to 15%), creating an explosive atmosphere. When the gas mixture encounters an electric arc, sparks, or hot surfaces, it ignites, producing a violent explosion (secondary explosion). Therefore, it is important to promptly control the fire when the primary explosion occurs to prevent a secondary explosion.

[0003] When an existing oil-immersed transformer is in use, if a primary explosion occurs in the oil tank, the oil pillow above it cannot be kept away from the transformer tank. The burning transformer tank heats the oil pillow, causing the oil temperature inside the pillow to rise and spontaneously combust, which will aggravate the severity of the fire and increase the risk of damage to the transformer and surrounding equipment. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a transformer with a fire extinguishing device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A transformer with a fire extinguishing device, comprising: The transformer body is used for a power transformer in a power system. An oil tank is provided inside the transformer body for storing oil to cool the transformer body; An oil pillow is used to store transformer oil and adjust the oil level in the oil tank inside the transformer body. The oil pillow is arranged above the oil tank inside the transformer body. A fire extinguishing assembly for extinguishing a fire in the oil tank inside the transformer body. The fire extinguishing assembly is arranged around the transformer body and includes two placement plates fixedly mounted on the end face of the transformer body near one end of the oil pillow. A placement frame is fixedly mounted on the upper surface of each of the two placement plates. Fire extinguishing cans are arranged inside each of the two placement frames. One of the fire extinguishing cans contains perfluorohexanone, and the other fire extinguishing can contains dry powder fire extinguishing agent. The protective component is used to drive the oil pillow away from the transformer body when the transformer body catches fire. The protective component is arranged between the oil pillow and the transformer body.

[0006] As a further solution of the present invention, a gas relay is fixedly installed on the top of the transformer body for analyzing the gas content of hydrogen, acetylene and carbon monoxide. A connecting hose is fixedly connected to the bottom of the oil pillow, and the bottom end of the connecting hose is fixedly connected to the liquid inlet end of the gas relay. The oil pillow is connected to the oil tank inside the transformer body through the connecting hose and the gas relay.

[0007] As a further solution of the present invention, a fireworks temperature sensor is fixedly installed on the upper surface of the transformer body, a conduit is fixedly installed on the top of the transformer body, the conduit is arranged around the transformer body, and a plurality of nozzles are fixedly installed at equal intervals on the upper surface of the conduit. Electromagnetic valves are provided on the tops of the two fire extinguishing tanks, and the air outlet ends of the two electromagnetic valves are fixedly connected to connecting air pipes. The air outlet ends of the two connecting air pipes are respectively fixedly connected to the two ends of the conduit, and the fire extinguishing tanks are connected to the inside of the conduit through the connecting air pipes.

[0008] As a further solution of the present invention, the protective component includes two rotating arms that are symmetrically mounted on the upper surface of the transformer body, the top ends of the two rotating arms are fixedly connected to the bottom of the oil pillow, and two support plates are fixedly mounted on one end of the transformer body close to the oil pillow, and a limiting slide is fixedly mounted between the outer surfaces of the two support plates. A sliding sleeve is slidably mounted on the outer surface of the limiting slide close to the top, and a support rod is rotatably mounted on the bottom of the oil pillow. The support rod is arranged between the two rotating arms, and the bottom end of the support rod is rotatably mounted on the outer surface of the sliding sleeve away from the oil pillow.

[0009] As a further solution of the present invention, a limiting plate is fixedly installed on the outer surface of the limiting slide rod, and a first spring is sleeved on the outer surface of the limiting slide rod. The first spring is arranged between the sliding sleeve and the limiting plate. A limiting cylinder is fixedly installed on the lower surface of the sliding sleeve, and the bottom end of the limiting cylinder is against the upper surface of the limiting plate. A limiting component is arranged between the sliding sleeve and the support plate.

[0010] The cam is fixedly mounted on the outside of the upper support plate, and the cam is mounted on a sidewall of the upper support plate, wherein the cam is secured to the bottom of the support plate with respect to the cam.

[0011] As a further solution of the present invention, the moving assembly includes two fixed blocks symmetrically fixedly installed on the outer surface of one side of the support block opposite to the sliding sleeve, and the outer surfaces of the opposite sides of the two fixed blocks are fixedly installed with a second compression cylinder, and a gap is provided between the axes of the two second compression cylinders, and the inner walls of the two second compression cylinders are slidably installed with a second piston plate, and the outer surfaces of the adjacent ends of the two second piston plates are fixedly installed with push rods, and the adjacent ends of the two push rods pass through the second compression cylinder and the outer surface of the fixed block and are slidably installed with the inner wall of the two push rods. The two push rods are fixedly installed with a head at one end, and the two heads are symmetrically arranged with each other, and the outer surfaces of the two heads away from the support block are provided with an inclined surface, and the upper surface of the other end of the square slide rod is fixedly installed with a pressure plate, and the outer surface of the pressure plate close to the support block is symmetrically provided with two oblique angles, and the two oblique angles respectively offset the two inclined surfaces, and the outer surface of the second compression cylinder close to the head is provided with a through hole.

[0012] As a further solution of the present invention, a contact sensor is fixedly installed on the outer surface of the transformer body near one of the fire extinguisher tanks, and the contact sensor is arranged above one of the fire extinguisher tanks. A circular groove is opened on the upper surface of the two placement plates, and a placement plate is slidably installed on the inner wall of the circular groove. A push rod is fixedly installed on the lower surface of the middle position of the placement plate, and the bottom end of the push rod passes through the lower surface of the placement plate and is slidably installed on its inner wall. A circular plate is fixedly installed on the bottom end of the push rod, and a tension spring is sleeved on the outer surface of the push rod. The top end of the tension spring is fixedly connected to the lower surface of the placement plate, and the bottom end of the tension spring is fixedly connected to the upper surface of the circular plate.

[0013] As a further solution of the present invention, the lower surfaces of the two placing plates are fixedly installed with a first compression cylinder, the inner walls of the two first compression cylinders are slidably installed with a first piston plate, the lower surfaces of the two first piston plates are fixedly installed with a piston rod, the bottom ends of the two piston rods pass through the lower surface of the first compression cylinder and are fixedly installed with a fixed plate, the other end of the fixed plate is fixedly installed with the lower surface of the circular plate, a plurality of exhaust holes are opened through the lower surface of the first compression cylinder, the outer surface of the first compression cylinder near the top is fixedly connected with a hydraulic pipe, the other end of the hydraulic pipe is fixedly connected to the other end of the second compression cylinder, the first compression cylinder is connected to the interior of the second compression cylinder through the hydraulic pipe, and the interiors of the first compression cylinder, the hydraulic pipe and the second compression cylinder are filled with hydraulic oil.

[0014] As a further solution of the present invention, a hole is provided through the upper surface of the limit plate away from the oil pillow, and the upper surface of the support plate below is provided with the same hole. Two semi-circular smooth columns are symmetrically installed for sliding between the inner walls of the two holes. The bottom ends of the two semi-circular smooth columns pass through the lower surface of the support plate and are fixedly installed with connecting plates. The ends of the two connecting plates away from each other are fixedly connected to the outer surfaces of the two fixed plates respectively.

[0015] When encountering an abnormal situation, the device triggers the current differential quick-break protection signal and starts to start; perfluorohexanone fire extinguishing agent is sprayed; conventional dry powder fire extinguishing agent is sprayed.

[0016] The movement of the pressure plate drives the square slide bar to move away from the limiting protrusion, so that the limiting roller at the end of the square slide bar rolls out from the lower surface of the limiting protrusion. At this time, the sliding sleeve is released from the limit, and then slides downward along the limiting slide bar under the gravity of the oil pillow. Through this device, when the two fire extinguisher tanks enter the fire extinguishing process, the oil pillow can be kept away from the transformer body in time, avoiding the fire causing the oil temperature inside the oil pillow to rise and spontaneously combust, thereby ensuring the risk of damage to the transformer body and surrounding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a transformer with a fire extinguishing device proposed by the present invention; Figure 2 This is a front structural diagram of a transformer with a fire extinguishing device proposed by the present invention; Figure 3 A schematic diagram of a fire extinguishing assembly of a transformer with a fire extinguishing device proposed by the present invention; Figure 4 This is a bottom view schematic diagram of a fire extinguishing assembly of a transformer with a fire extinguishing device proposed by the present invention; Figure 5 A schematic diagram of a placement plate for a transformer with a fire extinguishing device proposed by the present invention; Figure 6 A schematic diagram of a semi-circular smooth column of a transformer with a fire extinguishing device proposed by the present invention; Figure 7 A schematic diagram of a sliding sleeve of a transformer with a fire extinguishing device proposed by the present invention; Figure 8 A schematic diagram of a square sliding bar of a transformer with a fire extinguishing device proposed by the present invention; Figure 9 This is a top view of a square sliding bar of a transformer with a fire extinguishing device proposed by the present invention; Figure 10 This is a cross-sectional schematic diagram of a first compression cylinder of a transformer with a fire extinguishing device proposed by the present invention; Figure 11 This is a cross-sectional schematic diagram of a second compression cylinder of a transformer with a fire extinguishing device proposed by the present invention; Figure 12 for Figure 4 A partial enlarged schematic diagram in the middle; Figure 13 for Figure 4 A partial enlarged schematic diagram of point B in the middle.

[0018] In the figure: 1. Transformer body; 101. Gas relay; 2. Oil pillow; 3. Firework temperature sensor; 4. Rotating arm; 5. Connecting hose; 6. Conduit; 7. Nozzle; 8. Fire extinguisher; 801. Solenoid valve; 9. Contact sensor; 10. Placement plate; 1001. Placement tray; 1002. Circular plate; 1003. Tension spring; 1004. Push rod; 11. Placement frame; 12. Support plate; 13. Limiting slide bar; 14. Limiting plate; 15. First spring; 16. Sliding sleeve; 1601. Limiting cylinder; 17. Support rod. 18. First compression cylinder; 1801. Hydraulic pipe; 1802. Exhaust hole; 1803. First piston plate; 1804. Piston rod; 19. Semi-circular smooth column; 20. Connecting plate; 21. Fixed plate; 22. Support block; 23. Limiting protrusion; 24. Square slide bar; 25. Limiting roller; 26. Retaining ring; 27. Second spring; 28. Fixed block; 29. ​​Second compression cylinder; 2901. Through hole; 30. Push head; 3001. Inclined surface; 31. Pressure plate; 3101. Bevel; 32. Push rod; 33. Second piston plate. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0022] like Figure 1 and Figure 2 A transformer with a fire extinguishing device, comprising: The transformer body 1 is used for a power transformer in a power system. An oil tank is provided inside the transformer body 1 for storing oil to cool the transformer body 1 and prevent overheating of internal electrical components. The oil pillow 2 is used to store transformer oil and adjust the oil level of the oil tank inside the transformer body 1. The oil pillow 2 is arranged above the oil tank inside the transformer body 1. It helps to provide an effective cooling oil flow path at high temperatures, allowing the oil to flow better and improve the overall heat dissipation capacity; like Figure 1 and Figure 2 As shown, the fire extinguishing assembly is used to extinguish the oil tank inside the transformer body 1. The fire extinguishing assembly is arranged around the transformer body 1 to facilitate omnidirectional fire extinguishing of the oil tank inside the transformer body 1; The fire extinguishing assembly includes two placement plates 10 fixedly mounted on the end surface of the transformer body 1 near one end of the oil pillow 2. A placement frame 11 is fixedly mounted on the upper surface of the two placement plates 10. Fire extinguishing tanks 8 are arranged inside the two placement frames 11. The two fire extinguishing tanks 8 are placed inside the two placement frames 11 respectively, and they can be limited to prevent the position of the fire extinguishing tanks 8 from shifting, which is convenient for subsequent fire extinguishing use. One of the fire extinguisher tanks 8 contains perfluorohexanone. The fire extinguisher tank 8 containing perfluorohexanone is opened first to fully cover the oil tank inside the transformer body 1 and spray it to extinguish the fire. Through the dual mechanism of physical heat absorption cooling and chemical chain inhibition, the oil fire is efficiently extinguished. At the same time, it is ensured that no secondary explosion will be caused by the arc. The other fire extinguisher tank 8 contains dry powder fire extinguishing agent. The fire extinguisher tank 8 containing dry powder fire extinguishing agent is opened last. It isolates oxygen by covering the surface of the burning object (physical isolation) and decomposes and absorbs heat to suppress re-ignition. Through the dual mechanism of fire extinguishing, it is ensured that no secondary explosion will occur in the oil tank inside the transformer body 1. like Figure 2 and Figure 3 As shown, the protective component is arranged between the oil pillow 2 and the transformer body 1. It is used to drive the oil pillow 2 away from the transformer body 1 when the oil tank inside the transformer body 1 catches fire. The protective component can prevent the oil tank inside the transformer body 1 from overheating when it catches fire, and heat the oil inside the oil pillow 2 to ignite.

[0023] In this embodiment, Figure 1 and Figure 2 As shown, a gas relay 101 is fixedly installed on the top of the transformer body 1, which is used to analyze the content of gases such as hydrogen, acetylene, and carbon monoxide. When the monitored gas content exceeds the warning value, hierarchical protection will be implemented, that is, an alarm will be sounded first and then the circuit breaker will trip. A connecting hose 5 is fixedly connected to the bottom of the oil pillow 2, and the bottom end of the connecting hose 5 is fixedly connected to the liquid inlet end of the gas relay 101. The oil pillow 2 is connected to the oil tank inside the transformer body 1 through the connecting hose 5 and the gas relay 101. The oil inside the oil pillow 2 enters the oil tank inside the transformer body 1 through the connecting hose 5 and the gas relay 101, and circulates with the oil inside the oil pillow 2, which is convenient for dissipating heat to the electrical components on the transformer body 1.

[0024] In this embodiment, Figure 1 and Figure 3As shown, a fireworks temperature sensor 3 is fixedly installed on the upper surface of the transformer body 1. When the oil tank inside the transformer body 1 catches fire, the fireworks temperature sensor 3 will sense the fireworks, and the internal temperature sensor will also sense the temperature rise of the oil tank inside the transformer body 1. A conduit 6 is fixedly installed on the top of the transformer body 1. The conduit 6 is arranged around the transformer body 1. A plurality of nozzles 7 are fixedly installed at equal intervals on the upper surface of the conduit 6. An electromagnetic valve 801 is provided on the top of each of the two fire extinguishing tanks 8. The outlet ends of the two electromagnetic valves 801 are fixedly connected to connecting air pipes. The outlet ends of the two connecting air pipes are fixedly connected to the two ends of the conduit 6 respectively. The fire extinguishing tank 8 is connected to the interior of the conduit 6 through the connecting air pipe. The fireworks temperature sensor 3 sends an electrical signal to one of the electromagnetic valves 801 to open the valve, and then the perfluorohexanone inside one of the fire extinguishing tanks 8 will enter the interior of the conduit 6 through the connecting air pipe, and then be sprayed out from the nozzle 7 to fully cover the fire area of ​​the oil tank inside the transformer body 1.

[0025] In this embodiment, Figure 1-Figure 3 As shown, the protection component includes two rotating arms 4 symmetrically mounted on the upper surface of the transformer body 1, and the top ends of the two rotating arms 4 are fixedly connected to the bottom of the oil pillow 2, so that the oil pillow 2 can move downward with the help of the two rotating arms 4, thereby away from the top of the transformer body 1, and the transformer body 1 close to the oil pillow 2 is fixedly mounted with two support plates 12 aligned up and down, and a limiting slide 13 is fixedly mounted between the outer surfaces of the two support plates 12, and a sliding sleeve 16 is slidably mounted on the outer surface of the limiting slide 13 near the top, and a support rod 17 is rotatably mounted on the bottom of the oil pillow 2. The support rod 17 is arranged between the two rotating arms 4, and the bottom end of the support rod 17 is rotatably mounted on the outer surface of the sliding sleeve 16 away from the oil pillow 2. When the oil pillow 2 rotates downward, the support rod 17 can be driven to move downward, and the sliding sleeve 16 is driven to slide downward along the limiting slide rod 13 by the support rod 17. When the protection component is working, both fire extinguishing tanks 8 need to enter the fire extinguishing process before they can operate.

[0026] like Figure 4 、 Figure 5 and Figure 6 As shown, a limit plate 14 is fixedly mounted on the outer surface of the limit slide rod 13. A first spring 15 is sleeved on the outer surface of the limit slide rod 13. The first spring 15 is arranged between the sliding sleeve 16 and the limit plate 14. When the sliding sleeve 16 moves downward, it compresses the first spring 15 between it and the limit plate 14, so that the sliding sleeve 16 can buffer the downward movement of the sliding sleeve 16, thereby buffering the downward movement of the oil pillow 2, thereby preventing the oil pillow 2 from moving downward too quickly and damaging itself when it stops suddenly. A limiting cylinder 1601 is fixedly installed on the lower surface of the sleeve 16, and the bottom end of the limiting cylinder 1601 is against the upper surface of the limiting plate 14. This setting can limit the downward movement height of the sleeve 16, thereby limiting the downward movement distance of the oil pillow 2, so that the oil pillow 2 can be maintained at the farthest position from the transformer body 1.

[0027] In this embodiment, Figure 5 、 Figure 6 and Figure 7 As shown, a limit assembly is provided between the sliding sleeve 16 and the support plate 12. When the sliding sleeve 16 has not yet moved downward and stops at the highest end, the limit assembly limits it to stop at the highest end. The limiting assembly includes a support block 22 fixedly mounted on the lower surface of the upper support plate 12. The support block 22 is arranged on the side of the sliding sleeve 16 close to the transformer body 1. A square slide bar 24 is slidably inserted into the outer surface of the support block 22. The outer shape of the square slide bar 24 is square, which can ensure that it does not rotate when sliding. One end of the square slide bar 24 close to the sliding sleeve 16 passes through the outer surface of the square slide bar 24 and is slidably installed on its inner wall. A limiting roller 25 is rotatably installed on the inner wall of one end of the square slide bar 24 close to the sliding sleeve 16. A limiting protrusion 23 is fixedly mounted on the outer surface of the sliding sleeve 16 close to the limiting roller 25. The limiting roller 25 is arranged directly below the limiting protrusion 23. The circumferential outer surface of the limiting roller 25 is aligned with the limiting protrusion. The lower surface of the block 23 is against each other, and a retaining ring 26 is fixedly installed on the outer surface of the square slide rod 24 near one end of the sleeve 16. A second spring 27 is sleeved on the outer surface of the square slide rod 24, and one end of the second spring 27 is fixedly connected to the outer surface of the retaining ring 26. The other end of the second spring 27 is fixedly connected to the outer surface of the support block 22. Through the elastic force of the second spring 27, the square slide rod 24 drives the limiting roller 25 to be located below the limiting protrusion 23. The limiting roller 25 can limit the limiting protrusion 23 from sliding downward, thereby limiting the downward movement of the sleeve 16, so that the oil pillow 2 is always kept in a normal position when the terminal above the transformer body 1 is not on fire or the fire can be controlled in time.

[0028] In this embodiment, Figure 7 As shown, a motion component for driving the square slide bar 24 to slide is provided between the support block 22 and the placement plate 10 , and the motion component drives the square slide bar 24 to move along the inner wall of the support block 22 , toward or away from the sliding sleeve 16 .

[0029] In this embodiment, Figure 1As shown, a contact sensor 9 is fixedly installed on the outer surface of the transformer body 1 near one of the fire extinguishing tanks 8. When the pyrotechnic temperature sensor 3 still detects that the temperature of the oil tank inside the transformer body 1 is too high after a period of time after the first fire extinguishing, it will control the contact sensor 9 to start through an electrical signal. The contact sensor 9 is set above one of the fire extinguishing tanks 8. When one of the fire extinguishing tanks 8 moves up to a certain height, it will contact the contact sensor 9 in the started state, causing it to send an electrical signal to control the other electromagnetic valve 801 to open the valve, so that the dry powder fire extinguishing agent stored in the other fire extinguishing tank 8 is sprayed from the nozzle 7 to fully cover the fire area of ​​the oil tank inside the transformer body 1 again to extinguish the fire. When both fire extinguishing tanks 8 enter the fire extinguishing work, it can be judged that the fire is serious. like Figure 5 and Figure 13 As shown, circular grooves are provided on the upper surfaces of the two placing plates 10, and a placing plate 1001 is slidably installed on the inner wall of the circular groove. A push rod 1004 is fixedly installed on the lower surface of the placing plate 1001 in the middle position. The bottom end of the push rod 1004 passes through the lower surface of the placing plate 10 and is slidably installed on its inner wall. A circular plate 1002 is fixedly installed on the bottom end of the push rod 1004. A tension spring 1003 is sleeved on the outer surface of the push rod 1004. The top end of the tension spring 1003 is fixedly connected to the lower surface of the placing plate 10, and the bottom end of the tension spring 1003 is fixedly connected to the upper surface of the circular plate 1002.

[0030] When the two fire extinguishing tanks 8 open the electromagnetic valve 801 one after another, the weight of one of the fire extinguishing tanks 8 will gradually decrease because the perfluorohexanone fire extinguishing agent inside is released first. In the process of its weight being reduced to the lightest, the force of the tension spring 1003 causes the circular plate 1002 to drive the push rod 1004 to move upward, and the push rod 1004 drives the placement plate 1001 to move upward, so that the placement plate 1001 drives one of the fire extinguishing tanks 8 to move upward. When it touches the contact sensor 9, it will control the other fire extinguishing tank 8 to continue to spray dry powder fire extinguishing agent to extinguish the fire. Through this device, the two fire extinguishing tanks 8 can be put into the fire extinguishing process one after another. When one of them completely extinguishes the fire and the temperature monitored by the fireworks temperature sensor 3 is normal, the other one will not enter the fire extinguishing process, thereby avoiding wasting the use of the fire extinguishing tanks 8. When one of the fire extinguishing tanks 8 cannot completely stabilize the fire, the other one can enter the fire extinguishing process, thereby increasing the probability of successful fire extinguishing.

[0031] In this embodiment, Figure 4 and Figure 13It is shown that the first compression cylinder 18 is fixedly installed on the lower surface of the two placing plates 10, and the first piston plate 1803 is slidably installed on the inner wall of the two first compression cylinders 18. The piston rod 1804 is fixedly installed on the lower surface of the two first piston plates 1803. The bottom ends of the two piston rods 1804 pass through the lower surface of the first compression cylinder 18 and are fixedly installed with a fixed plate 21. The other end of the fixed plate 21 is fixedly installed on the lower surface of the circular plate 1002. A plurality of exhaust holes 1802 are opened through the lower surface of the first compression cylinder 18. The exhaust holes 1802 can balance the air pressure inside the first compression cylinder 18 when the first piston plate 1803 moves.

[0032] When the two fire extinguisher tanks 8 are opened one after another, the two circular plates 1002 will move upward one after another, and the upward movement of the circular plates 1002 will drive the fixed plate 21 to move upward. The fixed plate 21 drives the first piston plate 1803 to slide upward along the inner wall of the first compression cylinder 18 through the piston rod 1804, so that the first piston plate 1803 squeezes the hydraulic oil at the top of the first compression cylinder 18.

[0033] like Figure 8 and Figure 9 The motion assembly includes two fixed blocks 28 symmetrically fixedly mounted on the outer surface of the support block 22 on the side opposite to the sliding sleeve 16. A second compression cylinder 29 is fixedly mounted on the outer surface of the opposite side of the two fixed blocks 28. A gap is provided between the axes of the two second compression cylinders 29 so that the two second compression cylinders 29 are staggered with a distance in the direction perpendicular to the axis. A through hole 2901 is opened on the outer surface of the second compression cylinder 29 near the head 30. The through hole 2901 can balance the air pressure inside the second compression cylinder 29 when the second piston plate 33 moves, so that the second piston plate 33 can slide correctly. like Figure 9 、 Figure 12 and Figure 13 As shown, the inner walls of the two second compression cylinders 29 are both slidably mounted with a second piston plate 33, the outer surface of the first compression cylinder 18 near the top is fixedly connected to a hydraulic pipe 1801, the other end of the hydraulic pipe 1801 is fixedly connected to the other end of the second compression cylinder 29, the first compression cylinder 18 is connected to the interior of the second compression cylinder 29 through the hydraulic pipe 1801, and the interiors of the first compression cylinder 18, the hydraulic pipe 1801 and the second compression cylinder 29 are filled with hydraulic oil; When the hydraulic oil inside one of the first compression cylinders 18 flows into the inside of one of the second compression cylinders 29 through the hydraulic pipe 1801, one of the second piston plates 33 is driven by the oil pressure to move closer to the square slide bar 24; and then when the hydraulic oil inside another first compression cylinder 18 flows into the inside of another second compression cylinder 29 through the hydraulic pipe 1801, the other second piston plate 33 is also driven by the oil pressure to move closer to the square slide bar 24.

[0034] like Figure 9 As shown, the outer surfaces of the adjacent ends of the two second piston plates 33 are fixedly mounted with push rods 32, and the two second piston plates 33 move successively close to the square slide bar 24, driving the two push rods 32 to move successively close to the square slide bar 24, as shown in FIG. Figure 9 As shown, the push rod 32 on the left side of the square slide rod 24 moves closer to it first, and then the push rod 32 on the right side of the square slide rod 24 moves closer to it. The adjacent ends of the two push rods 32 pass through the outer surface of the second compression cylinder 29 and the fixed block 28 and are slidably installed on the inner wall thereof. The adjacent ends of the two push rods 32 are fixedly installed with a plug 30. The two plugs 30 are symmetrically arranged with each other. As the two push rods 32 move closer to the square slide rod 24 one after another, the two plugs 30 move closer to the square slide rod 24 one after another. The outer surface of the two heads 30 away from the support block 22 is provided with an inclined surface 3001. The upper surface of the other end of the square slide 24 is fixedly mounted with a pressure plate 31. The outer surface of the pressure plate 31 close to the support block 22 is symmetrically provided with two bevels 3101. The two bevels 3101 are respectively against the two inclined surfaces 3001. Figure 7 and Figure 9 As shown, the left side of the top head 30 will counteract the bevel 3101 on the left side of the pressure plate 31 through its inclined surface 3001, thereby driving the pressure plate 31 to move upward for a distance, that is, the pressure plate 31 moves a distance away from the limiting protrusion 23, and then the right side of the top head 30 will also counteract the bevel 3101 on the right side of the pressure plate 31 through its inclined surface 3001, thereby driving the pressure plate 31 to move upward for a distance. At this time, the pressure plate 31 is squeezed twice, thereby moving upward for a distance twice, and the pressure plate 31 is squeezed twice. The movement drives the square slide bar 24 away from the limiting protrusion 23, so that the limiting roller 25 at the end of the square slide bar 24 rolls out from the lower surface of the limiting protrusion 23. At this time, the sliding sleeve 16 is released from the limit, and then interacts downward along the limiting slide bar 13 under the gravity of the oil pillow 2. Through this device, when the two fire extinguishing tanks 8 enter the fire extinguishing process, the oil pillow 2 can be away from the transformer body 1 in time, avoiding the fire causing the oil temperature inside the oil pillow 2 to rise and spontaneously combust, thereby ensuring the risk of damage to the transformer body 1 and surrounding equipment.

[0035] In this embodiment, Figure 5 and Figure 9 As shown, a socket is formed on the upper surface of the limit plate 14 away from the oil pillow 2, and the upper surface of the lower support plate 12 is provided with the same socket. Two semi-circular smooth columns 19 are symmetrically slidably installed between the inner walls of the two sockets. The bottom ends of the two semi-circular smooth columns 19 pass through the lower surface of the support plate 12 and are fixedly installed with connecting plates 20. The ends of the two connecting plates 20 away from each other are fixedly connected to the outer surfaces of the two fixed plates 21 respectively.

[0036] Because when the two fixed plates 21 move up, the two semi-circular smooth columns 19 will be driven up, and when the sliding sleeve 16 moves downward, the limiting cylinder 1601 can be driven downward, and the bottom end of the limiting cylinder 1601 will be against the top end of the two semi-circular smooth columns 19, thereby pressing the two semi-circular smooth columns 19 down to their original positions. The downward movement of the two semi-circular smooth columns 19 will drive the two fixed plates 21 to be reset through their respective connected connecting plates 20, and will also drive the placement plate 1001 to be reset. This device facilitates the subsequent replacement of new fire extinguishing tanks 8. After the fire extinguishing tanks 8 are replaced, because the fixing plates 21 are reset, the top head 30 no longer contacts the pressure plate 31. At this time, the square slide bar 24 can move freely, which is convenient for the subsequent manual reset of the oil pillow 2. During manual reset, the square slide bar 24 can be manually pushed to facilitate the reset of the oil pillow 2.

[0037] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A transformer with a fire extinguishing device, characterized in that: include: A transformer body (1) is used for a power transformer in a power system, wherein an oil tank is provided inside the transformer body (1) for storing oil to cool the transformer body (1); An oil pillow (2) is used to store transformer oil and adjust the oil level of an oil tank inside the transformer body (1), wherein the oil pillow (2) is arranged above the oil tank inside the transformer body (1); A fire extinguishing assembly is used for extinguishing a fire in an oil tank inside a transformer body (1), the fire extinguishing assembly being arranged around the transformer body (1), the fire extinguishing assembly comprising two placement plates (10) fixedly mounted on an end face of the transformer body (1) close to one end of the oil pillow (2), a placement frame (11) being fixedly mounted on the upper surfaces of the two placement plates (10), a fire extinguishing tank (8) being arranged inside the two placement frames (11), one of the fire extinguishing tanks (8) storing perfluorohexanone inside, and the other fire extinguishing tank (8) storing dry powder fire extinguishing agent inside; A protective component is used to drive the oil pillow (2) away from the transformer body (1) when the transformer body (1) catches fire, and the protective component is arranged between the oil pillow (2) and the transformer body (1).

2. A transformer with a fire extinguishing device according to claim 1, characterized in that: A gas relay (101) is fixedly installed on the top of the transformer body (1) for analyzing the gas contents of hydrogen, acetylene and carbon monoxide. A connecting hose (5) is fixedly connected to the bottom of the oil pillow (2). The bottom end of the connecting hose (5) is fixedly connected to the liquid inlet end of the gas relay (101). The oil pillow (2) is connected to the oil tank inside the transformer body (1) through the connecting hose (5) and the gas relay (101).

3. The transformer with a fire extinguishing device according to claim 1, characterized in that: A pyrotechnic temperature sensor (3) is fixedly mounted on the upper surface of the transformer body (1), a conduit (6) is fixedly mounted on the top of the transformer body (1), the conduit (6) is arranged around the transformer body (1), a plurality of nozzles (7) are fixedly mounted at equal intervals on the upper surface of the conduit (6), and electromagnetic valves (801) are provided on the tops of the two fire extinguishing tanks (8), the gas outlet ends of the two electromagnetic valves (801) are fixedly connected to connecting air pipes, the gas outlet ends of the two connecting air pipes are fixedly connected to the two ends of the conduit (6), and the fire extinguishing tank (8) is connected to the interior of the conduit (6) through the connecting air pipe.

4. The transformer with a fire extinguishing device according to claim 1, characterized in that: The protection component comprises two rotating arms (4) symmetrically mounted on the upper surface of the transformer body (1), the top ends of the two rotating arms (4) are fixedly connected to the bottom of the oil pillow (2), and two support plates (12) are fixedly mounted on one end of the transformer body (1) close to the oil pillow (2) in an aligned manner, a limiting slide rod (13) is fixedly mounted between the outer surfaces of the two support plates (12), a sliding sleeve (16) is slidably mounted on the outer surface of the limiting slide rod (13) close to the top end, and a support rod (17) is rotatably mounted on the bottom of the oil pillow (2), the support rod (17) is arranged between the two rotating arms (4), and the bottom end of the support rod (17) is rotatably mounted on the outer surface of the sliding sleeve (16) away from the oil pillow (2).

5. The transformer with a fire extinguishing device according to claim 4, characterized in that: The outer surface of the limiting slide rod (13) is fixedly mounted with a limiting plate (14), the outer surface of the limiting slide rod (13) is sleeved with a first spring (15), the first spring (15) is arranged between the sliding sleeve (16) and the limiting plate (14), the lower surface of the sliding sleeve (16) is fixedly mounted with a limiting cylinder (1601), the bottom end of the limiting cylinder (1601) is against the upper surface of the limiting plate (14), and a limiting component is arranged between the sliding sleeve (16) and the support plate (12).

6. The transformer with a fire extinguishing device according to claim 5, characterized in that: The limiting assembly includes a support block (22) fixedly mounted on the lower surface of the upper support plate (12), the support block (22) being arranged on the side of the sleeve (16) close to the transformer body (1), a square slide bar (24) being slidably inserted into the outer surface of the support block (22), one end of the square slide bar (24) close to the sleeve (16) passing through the outer surface of the square slide bar (24) and being slidably mounted on the inner wall thereof, a limiting roller (25) being rotatably mounted on the inner wall of one end of the square slide bar (24) close to the sleeve (16), a limiting protrusion (23) being fixedly mounted on the outer surface of the sleeve (16) close to the limiting roller (25), and the limiting roller The wheel (25) is arranged just below the limiting protrusion (23), and the circumferential outer surface of the limiting roller (25) abuts against the lower surface of the limiting protrusion (23). The outer surface of the square slide rod (24) close to one end of the slide sleeve (16) is fixedly mounted with a retaining ring (26). The outer surface of the square slide rod (24) is sleeved with a second spring (27), one end of the second spring (27) is fixedly connected to the outer surface of the retaining ring (26), and the other end of the second spring (27) is fixedly connected to the outer surface of the support block (22). A motion component for driving the square slide rod (24) to slide is provided between the support block (22) and the placement plate (10).

7. The transformer with a fire extinguishing device according to claim 6, characterized in that: The motion assembly comprises two fixed blocks (28) symmetrically fixedly mounted on the outer surface of one side of the support block (22) relative to the sliding sleeve (16), the outer surfaces of the two fixed blocks (28) on the opposite sides are fixedly mounted with second compression cylinders (29), a gap is provided between the axes of the two second compression cylinders (29), the inner walls of the two second compression cylinders (29) are slidably mounted with second piston plates (33), the outer surfaces of the adjacent ends of the two second piston plates (33) are fixedly mounted with push rods (32), and the adjacent ends of the two push rods (32) penetrate the outer surfaces of the second compression cylinder (29) and the fixed block (28) and are slidably mounted on the inner walls thereof A plug (30) is fixedly mounted on one adjacent end of each of the two push rods (32), and the two plugs (30) are symmetrically arranged. The outer surfaces of the two plugs (30) on the side away from the support block (22) are both provided with an inclined surface (3001). A pressure plate (31) is fixedly mounted on the upper surface of the other end of the square slide rod (24), and the outer surface of the pressure plate (31) on the side close to the support block (22) is symmetrically provided with two oblique angles (3101), and the two oblique angles (3101) are respectively abutted against the two inclined surfaces (3001). A through hole (2901) is provided on the outer surface of the second compression cylinder (29) close to the plug (30).

8. The transformer with a fire extinguishing device according to claim 7, characterized in that: A contact sensor (9) is fixedly mounted on the outer surface of the transformer body (1) near one of the fire extinguishing tanks (8), and the contact sensor (9) is arranged above one of the fire extinguishing tanks (8). Circular grooves are opened on the upper surfaces of the two placement plates (10), and a placement plate (1001) is slidably mounted on the inner wall of the circular groove. A top rod (1004) is fixedly mounted on the lower surface of the placement plate (1001) at a middle position, and the bottom end of the top rod (1004) passes through the lower surface of the placement plate (10) and is slidably mounted on the inner wall thereof. A circular plate (1002) is fixedly mounted on the bottom end of the top rod (1004), and a tension spring (1003) is sleeved on the outer surface of the top rod (1004). The top end of the tension spring (1003) is fixedly connected to the lower surface of the placement plate (10), and the bottom end of the tension spring (1003) is fixedly connected to the upper surface of the circular plate (1002).

9. The transformer with a fire extinguishing device according to claim 8, characterized in that: The lower surfaces of the two placement plates (10) are fixedly mounted with a first compression cylinder (18), the inner walls of the two first compression cylinders (18) are slidably mounted with a first piston plate (1803), the lower surfaces of the two first piston plates (1803) are fixedly mounted with a piston rod (1804), the bottom ends of the two piston rods (1804) pass through the lower surface of the first compression cylinder (18) and are fixedly mounted with a fixing plate (21), the other end of the fixing plate (21) is fixedly mounted with the lower surface of the circular plate (1002), A plurality of exhaust holes (1802) are provided through the lower surface of the first compression cylinder (18), and a hydraulic pipe (1801) is fixedly connected to the outer surface of the first compression cylinder (18) near the top, and the other end of the hydraulic pipe (1801) is fixedly connected to the other end of the second compression cylinder (29). The first compression cylinder (18) is connected to the interior of the second compression cylinder (29) through the hydraulic pipe (1801), and the interiors of the first compression cylinder (18), the hydraulic pipe (1801) and the second compression cylinder (29) are filled with hydraulic oil.

10. The transformer with a fire extinguishing device according to claim 9, characterized in that: A socket is formed through the upper surface of the limit plate (14) on the side away from the oil pillow (2), and a similar socket is formed through the upper surface of the support plate (12) below. Two semi-circular smooth columns (19) are symmetrically slidably mounted between the inner walls of the two sockets. The bottom ends of the two semi-circular smooth columns (19) penetrate the lower surface of the support plate (12) and are fixedly mounted with a connecting plate (20). The ends of the two connecting plates (20) that are away from each other are fixedly connected to the outer surfaces of the two fixing plates (21).

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