A distribution transformer fault automatic alarm device

Abstract

The present invention discloses an automatic fault alarm device for a distribution transformer, including a pressure chamber and a buzzer assembly, wherein a mounting frame is fixedly connected above the pressure chamber, and an alarm assembly for flashing a warning light when a transformer fails is provided below the mounting frame. The present invention uses components such as a buzzer assembly, a temperature sensor, and a pressure tank. When the temperature inside the transformer reaches a certain value, the temperature sensor supplies power to a piezoelectric ceramic sheet through an electric wire. Under the action of the piezoelectric ceramic sheet, a sounding shell generates a sound alarm to alert patrol personnel. At the same time, the inside of the transformer is cooled and oxygen is isolated, thereby eliminating fire hazards, reducing safety risks before maintenance personnel arrive, and avoiding continuous high temperature or open flames in the transformer, which increases safety risks. At the same time, corresponding alarm measures are automatically taken when the fault condition just occurs, extending the alarm time forward and further reducing the risk of fault deterioration.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, and in particular to an automatic fault alarm device for a distribution transformer. Background Art

[0002] The transformer is mainly composed of the following key components: iron core, winding, oil tank, oil level indicator and insulating sleeve. Among them, the oil tank is the outer protective shell of the transformer, which contains the iron core and winding inside and is filled with transformer oil to ensure that these core components are completely immersed in oil. Transformer oil plays a vital role in insulation. High temperature is a major threat to transformer operation. When the temperature of the transformer rises, its insulation performance will be affected, accelerating the aging of internal components and even causing failures.

[0003] In this regard, the automatic transformer fault alarm device disclosed in the patent publication number "CN114705353A" uses the setting of the shell, spring piece, push rod and alarm to deform the protrusion by using the pressure of oil vapor, and use the deformation to make the push rod touch the switch of the alarm to make the alarm sound, and transform the detection of oil vapor alarm into using the pressure change of oil vapor to realize the alarm. Although the influence of external temperature is avoided, the alarm will only be sounded when the oil vapor pressure rises to a certain value. However, in actual use, the transformer oil will usually be gasified when the temperature is above 100 degrees Celsius or even higher. When the oil and gas condense to a certain pressure, the internal temperature of the transformer has already exceeded the safety warning value. At this time, the alarm is triggered again and the safety alarm time has long passed. There is a long hysteresis, which is very likely to threaten the lives of nearby personnel. Accordingly, the present application proposes an automatic distribution transformer fault alarm device. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose an automatic alarm device for distribution transformer fault.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An automatic alarm device for distribution transformer faults, comprising a pressure chamber and a buzzer assembly;

[0007] A mounting frame is fixedly connected above the pressure cabin, an alarm component for flashing a warning light when a transformer fails is provided below the mounting frame, a triangular platform is connected below, two brackets are fixedly connected above the triangular platform, and the two brackets are provided with a warning component for warning personnel not to approach when a transformer fails, a frame plate is fixedly connected to the inner wall of the triangular platform, and a pressure relief and heat dissipation component for releasing the internal pressure of the transformer and dissipating heat is provided on the triangular platform;

[0008] The buzzer component is used to sound an alarm when a transformer fails. The buzzer component consists of a sounding shell, a piezoelectric ceramic sheet, a spring and a cone. The sounding shell is fixedly installed on one side of the pressure cabin, the piezoelectric ceramic sheet is fixedly installed inside the sounding shell, the spring is fixedly connected to the piezoelectric ceramic sheet, and the cone is fixedly connected to one end of the spring.

[0009] Preferably, the alarm assembly consists of a trigger-type alarm light, a push block, a piston rod and a piston; the trigger-type alarm light is fixedly mounted below the mounting frame, the piston is attached to the inner wall of the pressure chamber, the piston rod is fixedly connected to the piston, the push block is fixedly connected to the piston rod and is disposed below the trigger-type alarm light, and push components for making the alarm assembly work are respectively disposed on both sides of the push block.

[0010] Preferably, the warning component includes a roller, a warning curtain, two gears and two racks, the roller is rotatably connected between two brackets, the warning curtain is wrapped around the roller, the two gears are rotatably connected to both sides of the bracket, the two gears are respectively fixedly connected to both sides of the roller, and the two racks are respectively meshed and connected to the two gears.

[0011] Preferably, connecting plates are fixedly connected on both sides of the pressure chamber, guide rails are fixedly connected above the two connecting plates, a pressure tank is fixedly connected above the frame plate, a film is provided on the pressure tank, and a temperature sensor is fixedly installed below the frame plate.

[0012] Preferably, the pressure relief and heat dissipation assembly includes two piston cylinders, two plugs and two round rods. The two piston cylinders are fixedly connected to the triangular table, slide rails are fixedly connected to the top of the two piston cylinders, the two round rods are fixedly connected to the bottom of two racks, the two plugs are respectively attached to the inner walls of the two piston cylinders, and the two plugs are respectively fixedly connected to the two round rods.

[0013] Preferably, the sound-generating housing is electrically connected to an electric wire, one end of the electric wire away from the sound-generating housing is electrically connected to a temperature sensor, and the tip of the cone is close to the film.

[0014] Preferably, the two pushing assemblies include two push rods, two springs, two limit blocks, two triangular blocks and two limit rods. The two push rods are respectively slidably connected to both sides of the push block, the two triangular blocks are respectively fixedly connected to one end of the two push rods, the two limit blocks are respectively arranged in the push block and fixedly connected to the two push rods, one end of the two springs are respectively fixedly connected to both sides of the push block, and the other ends are respectively fixedly connected to the two triangular blocks, and the two limit rods are respectively slidably connected to the two guide rails.

[0015] Preferably, a torsion spring is provided at the connection between the rotating roller and the two brackets, a twist handle is fixedly connected to the two gears respectively, and the two racks are slidably connected to the two slide rails respectively.

[0016] Preferably, the pressure tank is filled with carbon dioxide, the film is provided under the piston, and the film is a stretched polypropylene film.

[0017] Preferably, the two piston cylinders are respectively provided with a plurality of exhaust and heat dissipation ports.

[0018] The present invention has the following beneficial effects:

[0019] Through the buzzer component, temperature sensor, pressure tank and other components, when the temperature inside the transformer reaches a certain value, the temperature sensor supplies power to the piezoelectric ceramic piece through the wire. Under the action of the piezoelectric ceramic piece, the sound-emitting shell emits a sound alarm to alert the patrol personnel. At the same time, under the high-frequency vibration of the piezoelectric ceramic piece, the shrapnel drives the cone to vibrate and puncture the film. Since the film has been stretched in advance, it shrinks rapidly after being punctured, causing the carbon dioxide in the pressure tank to spray out rapidly, cooling the inside of the transformer and isolating the oxygen, thereby eliminating the fire hazard, reducing the safety risk before the maintenance personnel arrive, and avoiding continuous high temperature or open flames in the transformer, which increases the safety risk. At the same time, the corresponding alarm measures are automatically taken when the fault condition just occurs, which extends the alarm time forward and further reduces the risk of fault deterioration.

[0020] Through the alarm component, after the carbon dioxide in the pressure tank is sprayed out, the strong pressure causes the piston to drive the piston rod upward, pushing the push block, causing the push block to trigger the trigger alarm light upward, thereby causing the trigger alarm light to flash, making the transformer fault alarm more eye-catching, and also making up for the lack of alarm influence at night.

[0021] Through the pushing assembly and the warning assembly, when the pushing block rises, the triangular block will rise. When it rises above the pressure cabin, under the action of the spring force, the triangular block pushes the limit rod to disengage the sawtooth on the gear, thereby releasing the limit on the gear. Under the action of the torsion spring, the roller drives the gear to rotate while extending the warning curtain above the triangular platform, thereby warning and prohibiting unauthorized personnel from approaching. At the same time, when the triggered alarm light and the sounding shell also fail, it can still serve as an alarm warning.

[0022] Through the pressure relief and heat dissipation component, when the gear rotates, the rack drives the round rod to slide upward, thereby pulling up the blockage under the round rod and placing it above the exhaust and heat dissipation port on the piston cylinder, thereby relieving the pressure inside the transformer and dissipating the high-temperature gas inside the transformer, thereby further reducing the internal temperature of the transformer and reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an automatic alarm device for distribution transformer fault proposed by the present invention;

[0024] Figure 2 This is a schematic diagram of the connection structure of the buzzer, pressure chamber, frame plate and other components of the automatic alarm device for distribution transformer fault proposed by the present invention;

[0025] Figure 3 This is a schematic diagram of the connection structure of the internal parts of the tripod of the automatic alarm device for distribution transformer fault proposed by the present invention;

[0026] Figure 4 This is a schematic diagram of the connection structure of the components such as the cone spike, pressure tank, and film of an automatic alarm device for distribution transformer fault proposed by the present invention;

[0027] Figure 5 This is a schematic diagram of the piezoelectric ceramic sheet, spring sheet and cone thorn connection structure of an automatic alarm device for distribution transformer fault proposed by the present invention;

[0028] Figure 6 This is a cross-sectional view of the interior of a pressure chamber of an automatic alarm device for distribution transformer fault proposed by the present invention;

[0029] Figure 7 This is a schematic diagram of the connection structure of the piston, piston rod, push block and other parts of the automatic alarm device for distribution transformer fault proposed by the present invention;

[0030] Figure 8 This is a schematic diagram of the connection structure of a triangular block, a push rod, a spring and a limit block of an automatic alarm device for distribution transformer fault proposed by the present invention;

[0031] Fig. 9 This is a schematic diagram of the connection structure of the slide rail, rack, round rod and blockage of the automatic alarm device for distribution transformer fault proposed by the present invention;

[0032] Fig.10 This is a schematic diagram of the overall connection structure of the automatic alarm device for distribution transformer fault proposed by the present invention in the non-alarm state.

[0033] In the figure: 1 triangular table, 2 pressure chamber, 3 rack, 4 slide rail, 5 connecting plate, 6 limit rod, 7 roller, 8 gear, 9 handle, 10 warning curtain, 11 bracket, 12 sound shell, 13 temperature sensor, 14 mounting frame, 15 guide rail, 16 trigger type warning light, 17 piston cylinder, 18 triangular block, 19 push block, 20 pressure tank, 21 frame plate, 22 shrapnel, 23 cone spike, 24 film, 25 wire, 26 piezoelectric ceramic sheet, 27 piston rod, 28 piston, 29 spring, 30 round rod, 31 plug, 32 push rod, 33 limit block. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Embodiment 1

[0035] Reference Figure 1-Figure 6 , an automatic alarm device for distribution transformer fault, including a pressure chamber 2, a buzzer component, an alarm component and a warning component.

[0036] A mounting frame 14 is fixedly connected above the pressure chamber 2 for installing a trigger alarm light 16. A tripod 1 is connected below the pressure chamber 2. The tripod 1 is used to be connected above the transformer so that the temperature sensor 13 in the tripod 1 can detect the temperature inside the transformer in real time. Two brackets 11 are fixedly connected above the tripod 1 for supporting the roller 7. A frame plate 21 is fixedly connected to the inner wall of the tripod 1 for supporting the pressure tank 20. A pressure relief and heat dissipation component for releasing the internal pressure of the transformer and dissipating heat is provided on the tripod 1.

[0037] The buzzer assembly is used to sound an alarm when the transformer fails. The buzzer assembly consists of a sound-generating housing 12, a piezoelectric ceramic sheet 26, a spring 22, and a cone thorn 23. The sound-generating housing 12 is fixedly mounted on one side of the pressure chamber 2, and the piezoelectric ceramic sheet 26 is fixedly mounted inside the sound-generating housing 12. When voltage is applied, the piezoelectric ceramic sheet 26 can generate frequency vibrations with the metal sheet above it, and the sound generated by the vibration is amplified and transmitted in the sound cavity in the sound-generating housing 12. The spring 22 is fixedly connected to the piezoelectric ceramic sheet 26, and the cone thorn 23 is fixedly connected to one end of the spring 22. In this way, when the piezoelectric ceramic sheet 26 vibrates, the spring 22 can amplify its vibration effect and drive the cone thorn 23 to vibrate together, so that the cone thorn 23 punctures the film 24.

[0038] The pressure tank 20 is filled with carbon dioxide, which has a good cooling and fire extinguishing effect. It can cool the inside of the transformer when the temperature inside the transformer is high and eliminate the fire source that may be caused by the high temperature. The film 24 is provided under the piston 28. The film 24 is made of a stretched polypropylene film, so that when the film 24 is punctured, the film 24 will shrink rapidly, so that the carbon dioxide in the pressure tank 20 can be quickly ejected, and the polypropylene film has good pressure resistance, so that the carbon dioxide in the pressure tank 20 will not leak out in advance. The sound-generating shell 12 is electrically connected to a wire 25, and the end of the wire 25 away from the sound-generating shell 12 is electrically connected to the temperature sensor 13. When the temperature sensor 13 detects the warning temperature value, the wire 25 will be energized, thereby energizing the buzzer component, and the tip of the cone thorn 23 is close to the film 24, so that when the cone thorn 23 vibrates, the film 24 can be easily punctured.

[0039] In this embodiment, the tripod 1 is first connected to the top of the transformer, and through the buzzer component, temperature sensor 13, pressure tank 20 and other components, when the temperature inside the transformer reaches a certain value, the temperature sensor 13 supplies power to the piezoelectric ceramic sheet 26 through the wire 25. Under the action of the piezoelectric ceramic sheet 26, the sound-emitting shell 12 generates a sound alarm to alert the patrol personnel. At the same time, under the high-frequency vibration of the piezoelectric ceramic sheet 26, the shrapnel 22 drives the cone thorn 23 to vibrate and puncture the film 24. The film is made of polypropylene film, which has good pressure resistance, so that the carbon dioxide in the pressure tank 20 will not leak out. Since the film 24 has been stretched in advance, it will shrink rapidly after being punctured, so that the carbon dioxide in the pressure tank 20 will be quickly ejected, cooling the inside of the transformer and isolating oxygen, thereby eliminating fire hazards, reducing safety risks before maintenance personnel arrive, avoiding continuous high temperature or open flames in the transformer, and increasing safety risks. At the same time, corresponding alarm measures are automatically taken when the fault situation just occurs, extending the alarm time forward, and further reducing the risk of fault deterioration. Embodiment 2

[0040] Different from the first embodiment, Figure 1 , Figure 2 and Figure 6 , this embodiment also has the following further contents:

[0041] The alarm assembly is used to flash a warning light when a transformer fails. The alarm assembly consists of a trigger alarm light 16, a push block 19, a piston rod 27 and a piston 28. The trigger alarm light 16 is fixedly mounted below the mounting frame 14, and the piston 28 is attached to the inner wall of the pressure chamber 2, so that when carbon dioxide comes out of the pressure tank 20, the carbon dioxide will not leak upward. The piston rod 27 is fixedly connected to the piston 28, and the push block 19 is fixedly connected to the piston rod 27 and is arranged below the trigger alarm light 16. In this way, when the piston 28 is pushed by carbon dioxide, the piston rod 27 can drive the push block 19 to touch the trigger alarm light, thereby sounding an alarm. Push components that enable the alarm assembly to work are respectively provided on both sides of the push block 19.

[0042] In this embodiment, through the alarm component, after the carbon dioxide in the pressure tank 20 is sprayed out, the strong pressure causes the piston 28 to drive the piston rod 27 upward, pushing the push block 19, so that the push block 19 triggers the trigger alarm light 16 upward, thereby causing the trigger alarm light 16 to flash, making the transformer fault alarm more eye-catching, and also making up for the lack of alarm influence at night. Embodiment 3

[0043] Reference Figure 1-Figure 2 and Figure 7-Figure 10 , compared with the first embodiment and the second embodiment, in this embodiment:

[0044] The warning component is used to warn people not to approach when a transformer fails. The warning component includes a roller 7, a warning curtain 10, two gears 8 and two racks 3. The roller 7 is rotatably connected between the two brackets 11, and the warning curtain 10 is wrapped around the roller 7. The two gears 8 are rotatably connected to both sides of the bracket 11. The two gears 8 are fixedly connected to both sides of the roller 7. The two racks 3 are respectively meshed and connected to the two gears 8. In this way, when the roller 7 rotates, the gear 8 can be driven to rotate, thereby causing the rack 3 to slide. A torsion spring is provided at the connection between the roller 7 and the two brackets 11. In this way, when the limit rod 6 leaves the gear 8, the roller 7 can rotate quickly under the action of the torsion spring to extend the warning curtain 10. The two gears 8 are respectively fixedly connected with a twist handle 9. When the blockage 31 needs to be reset, the gear 8 is turned to its original position by twisting the twist handle 9, and then the limit rod 6 is pushed to clamp the gear 8. The two racks are respectively slidably connected to the two slide rails 4.

[0045] The two pushing components include two push rods 32, two springs 29, two limit blocks 33, two triangular blocks 18 and two limit rods 6. The two push rods 32 are slidably connected to the two sides of the push block 19 respectively, and the two triangular blocks 18 are fixedly connected to one end of the two push rods 32 respectively. The two limit blocks 33 are respectively arranged in the push block 19 and fixedly connected to the two push rods 32. The limit blocks 33 can prevent the push rods 32 and the triangular blocks 18 from separating from the push block 19. One end of the two springs 29 is respectively fixedly connected to the two sides of the push block 19, and the other end is respectively fixedly connected to the two triangular blocks 18. The two limit rods 6 are respectively slidably connected to the two guide rails 15. In this way, when the push block 19 drives the triangular block 18 to rise above the pressure chamber 2, under the action of the rebound force of the spring 29, the push block 19 can be quickly pushed to make the limit rod 6 slide, so that one end of the limit rod 6 leaves the serrations of the gear 8, thereby releasing the limit on the gear 8.

[0046] The pressure relief and heat dissipation assembly includes two piston cylinders 17, two plugs 31 and two round rods 30. The two piston cylinders 17 are fixedly connected to the triangular table 1. The two piston cylinders 17 are respectively fixedly connected with slide rails 4 above them. The two round rods 30 are respectively fixedly connected under the two racks 3. When the racks 3 slide, they can drive the round rods 30 to slide at the same time. The two plugs 31 are respectively attached to the inner walls of the two piston cylinders 17. In this way, in the event of a fault alarm, the internal sealing of the transformer is maintained. The two plugs 31 are respectively fixedly connected to the two round rods 30. When the round rods 30 slide, they can drive the plugs 31 to slide in the piston cylinders 17. The two piston cylinders 17 are respectively provided with a number of exhaust and heat dissipation ports. When the plugs 31 rise to above the exhaust and heat dissipation ports, the high-temperature gas inside the transformer can be dissipated, thereby further reducing the internal temperature of the transformer and reducing safety risks.

[0047] In this embodiment, when the push block 19 rises, the triangular block 18 will rise. When it rises above the pressure chamber 2, under the action of the elastic force of the spring 29, the triangular block 18 pushes the limit rod 6 to disengage the serrations on the gear 8, thereby releasing the limit on the gear 8. Under the action of the torsion spring, the roller 7 drives the gear 8 to rotate while extending the warning curtain 10 above the triangular table 1. When the gear 8 rotates, the rack 3 drives the round rod 30 to slide upward, thereby pulling up the plug 31 under the round rod 30, so that it is above the exhaust and heat dissipation port on the piston cylinder 17, thereby relieving the pressure inside the transformer and dissipating the high-temperature gas inside the transformer, thereby further reducing the internal temperature of the transformer and reducing safety risks. The extended warning curtain 10 can serve as a warning to prohibit irrelevant personnel from approaching, and can also serve as an alarm when the trigger alarm light 16 and the sounding shell 12 also fail.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic alarm device for distribution transformer fault, characterized in that: It comprises a pressure chamber (2) and a buzzer assembly; A mounting frame (14) is fixedly connected above the pressure chamber (2), and an alarm component for flashing a warning light when a transformer fails is provided below the mounting frame (14). A tripod (1) is connected below the pressure chamber (2), and the tripod (1) is connected above the transformer. Two brackets (11) are fixedly connected above the tripod (1), and the two brackets (11) are provided with an alarm component for warning personnel not to approach when a transformer fails. A frame plate (21) is fixedly connected to the inner wall of the tripod (1), and a pressure tank (20) is fixedly connected above the frame plate (21). Carbon dioxide is contained in the pressure tank (20), and a film (24) is provided on the pressure tank (20). A temperature sensor (13) is fixedly installed below the frame plate (21), and a pressure relief and heat dissipation component for releasing the internal pressure of the transformer and dissipating heat is provided on the tripod (1); The buzzer assembly is used to sound an alarm when a transformer fails. The buzzer assembly is composed of a sound-generating housing (12), a piezoelectric ceramic sheet (26), a spring (22) and a cone (23). The sound-generating housing (12) is fixedly mounted on one side of the pressure chamber (2), the piezoelectric ceramic sheet (26) is fixedly mounted inside the sound-generating housing (12), the spring (22) is fixedly connected to the piezoelectric ceramic sheet (26), the cone (23) is fixedly connected to one end of the spring (22), and the tip of the cone (23) is close to the film (24); the sound-generating housing (12) is electrically connected to an electric wire (25), and the end of the electric wire (25) away from the sound-generating housing (12) is electrically connected to the temperature sensor (13); The alarm component is composed of a trigger type alarm light (16), a push block (19), a piston rod (27) and a piston (28); the trigger type alarm light (16) is fixedly mounted below the mounting frame (14); the piston (28) is attached to the inner wall of the pressure chamber (2); the piston rod (27) is fixedly connected to the piston (28); the push block (19) is fixedly connected to the piston rod (27) and is arranged below the trigger type alarm light (16); and push components for making the alarm component work are respectively arranged on both sides of the push block (19); the film (24) is arranged below the piston (28); The warning component comprises a rotating roller (7), a warning curtain (10), two gears (8) and two racks (3); the rotating roller (7) is rotatably connected between two brackets (11); the warning curtain (10) is wound around the rotating roller (7); the two gears (8) are rotatably connected to both sides of the bracket (11); the two gears (8) are respectively fixedly connected to both sides of the rotating roller (7); and the two racks (3) are respectively meshed and connected to the two gears (8); The pressure relief and heat dissipation assembly comprises two piston cylinders (17), two plugs (31) and two round rods (30); the two piston cylinders (17) are fixedly connected to the triangular table (1); the two piston cylinders (17) are respectively fixedly connected with slide rails (4); the two racks (3) are respectively slidably connected to the two slide rails (4); the two round rods (30) are respectively fixedly connected to the bottom of the two racks (3); the two plugs (31) are respectively attached to the inner walls of the two piston cylinders (17); the two plugs (31) are respectively fixedly connected to the two round rods (30); and a plurality of exhaust and heat dissipation ports are respectively provided on the two piston cylinders (17).

2. The automatic fault alarm device for distribution transformer according to claim 1 is characterized in that: The pressure chamber (2) is fixedly connected with connecting plates (5) on both sides, and the guide rails (15) are fixedly connected above the two connecting plates (5). The two pushing components include two push rods (32), two springs (29), two limit blocks (33), two triangular blocks (18) and two limit rods (6). The two limit rods (6) can be respectively engaged with the two gears (8). The two push rods (32) are respectively slidably connected to the two sides of the push block (19). The two triangular blocks (18) are respectively fixedly connected to one end of the two push rods (32). The two limit blocks (33) are respectively arranged in the push block (19) and fixedly connected to the two push rods (32). One end of the two springs (29) is respectively fixedly connected to the two sides of the push block (19), and the other end is respectively fixedly connected to the two triangular blocks (18). The two limit rods (6) are respectively slidably connected to the two guide rails (15).

3. The automatic fault alarm device for distribution transformer according to claim 2 is characterized in that: A torsion spring is provided at the connection between the rotating roller (7) and the two brackets (11), and a twisting handle (9) is fixedly connected to each of the two gears (8).

4. The automatic fault alarm device for distribution transformer according to claim 3 is characterized in that: The film (24) is a stretched polypropylene film.

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