Transformer fire automatic alarm device and transformer

Abstract

The utility model relates to the field of transformer equipment, in particular to an automatic fire alarm device for a transformer and the transformer, which comprises an early warning component positioned on an outer machine body of the transformer, a filter communicated with the inside is arranged on the outer machine body, and a mounting plate is fixedly arranged at the top end part of the outer machine body; the early warning assembly comprises an air inlet box, a negative pressure fan, an exhaust pipeline, an early warning device and a smoke sensor; the air inlet box is located on the mounting plate, communicates with the interior of the outer machine body and communicates with the air inlet end of the negative pressure fan through an air inlet pipe. A mounting piece of a hollow structure is connected into the air inlet box, the smoke sensor is located on the mounting piece, the smoke sensor is in signal connection with a controller, and the controller is in signal connection with an early warning device. The exhaust pipeline is located below the mounting plate, and the negative pressure fan is connected with an exhaust pipe communicating with the exhaust pipeline. According to the utility model, on the premise of not changing the internal structure arrangement of the transformer, the internal condition of the transformer can be directly detected without causing erroneous judgment.

Description

Technical Field

[0001] The utility model relates to the field of transformer equipment, in particular to an automatic transformer fire alarm device and a transformer. Background Art

[0002] Transformers are static electrical devices used to transform AC voltage and current to transmit AC power. Transformers play a very important role in the power grid system, so the stable and safe operation of transformers is related to the normal operation of the power grid. During the operation of transformers, electrical faults, excessive coil temperature, aging, etc. are prone to cause internal fires, which in turn affect the normal operation of the power grid. Fire monitoring of transformers is very necessary.

[0003] However, the fire inside the transformer cannot be directly observed, making it difficult for the staff to rescue in time. The traditional method of judging the equipment status based on the tone is prone to misjudgment. During the long-term operation during the peak power consumption period in summer, the temperature will remain high for a long time, so there is a risk of fire. When the coil inside the transformer catches fire, it cannot be directly observed from the outside, so the monitoring personnel cannot discover the hidden fire in the first time, resulting in missing the best time for firefighting, and even causing a bigger fire.

[0004] Regarding the problem that transformer fires cannot be discovered directly and timely, an automatic transformer fire alarm device in existing literature can provide early warning of fire inside the transformer, but it needs to push the sealing ball to release pressure through the expansion of air when an internal fire occurs, and the reaction is slow. At the same time, since the internal temperature of the transformer is relatively high during normal use, it is easy to expand and push the sealing ball to release pressure when there is no fire, causing the device to make a sound. It is very easy to misjudge the transformer situation based on the tone, and the device often makes a sound but does not catch fire. Over time, even if a fire occurs, it is very easy to be ignored. Utility Model Content

[0005] One of the purposes of the utility model is to provide an automatic transformer fire alarm device to solve the problem that the existing transformer fire situation is easily misjudged.

[0006] The transformer fire automatic alarm device in this scheme includes an early warning component located on the outer body of the transformer, the outer body is provided with a filter connected to the inside, and a mounting plate is fixed on the top end of the outer body;

[0007] The early warning component includes an air intake box, a negative pressure fan, an exhaust pipe, an early warning device and a smoke sensor;

[0008] The air inlet box is located on the mounting plate, the air inlet box is connected to the interior of the outer body, and the air inlet box is connected to the air inlet end of the negative pressure fan through an air inlet pipe;

[0009] A hollow-shaped mounting plate is connected inside the air intake box, the smoke sensor is located on the mounting plate, the smoke sensor signal is connected to a controller, and the controller signal is connected to an early warning device;

[0010] The exhaust duct is located below the mounting plate, and the negative pressure fan is connected to an exhaust pipe which is in communication with the exhaust duct.

[0011] The beneficial effects of this program are:

[0012] Using the air extracted from the transformer for smoke detection can give an early warning before an open flame occurs, which is helpful to reduce the damage to the transformer. Without changing the internal structure of the transformer, the internal situation of the transformer can be directly detected without causing misjudgment. Directly extracting the air inside the transformer and then taking in air from the filter can improve the heat dissipation effect of the transformer.

[0013] Furthermore, an odor sensor is provided on the mounting plate, and a signal of the odor sensor is connected to a controller.

[0014] The beneficial effect is: since electrical components will produce a large amount of odorous gas in addition to smoke when burning, sensors for detecting odors are used in conjunction to improve the sensitivity of monitoring and early warning.

[0015] Furthermore, a cooling assembly for water-cooling the extracted gas is connected between the exhaust pipe and the exhaust pipeline, and the cooling assembly is connected to a connecting pipe, which is connected to the exhaust pipeline.

[0016] The beneficial effect is that the cooling component can cool the air with a certain temperature drawn from the inside of the outer body, thereby making the discharge more environmentally friendly, and can cool the heat dissipation fins of the transformer to a certain extent.

[0017] Furthermore, the cooling assembly includes a cooling box containing a cooling medium, the connecting pipe is connected to the cooling box, an injection port for the cooling medium is provided on the cooling box, the injection port is inclined, and the end of the exhaust pipe is close to the bottom of the cooling box.

[0018] The beneficial effect is that the arrangement of the cooling box and the injection port thereof can facilitate the replenishment of the cooling medium in the cooling box.

[0019] Furthermore, a liquid level meter is provided in the cooling box, and a signal of the liquid level meter is connected to a controller.

[0020] The beneficial effect is that by setting the liquid level meter, the amount of cooling medium in the cooling box can be understood in real time, so as to replenish the cooling medium in time.

[0021] Furthermore, the exhaust duct is located below the mounting plate, the exhaust duct is fixed to the outer body through a first connecting frame, the exhaust duct is arranged around the outer side of the mounting plate, the exhaust duct extends out of the side wall of the outer body, and a plurality of air outlets are provided on the side wall facing downward, the air outlet of the exhaust duct is aligned with the heat dissipation fins of the transformer body, and an air outlet net is fixed on the air outlet.

[0022] The beneficial effect is that the setting of the exhaust duct can dissipate the heat of the transformer from multiple directions with the cooled air, thereby improving the heat dissipation effect.

[0023] The second purpose of the utility model is to provide a transformer to promptly warn of internal fire situations.

[0024] Transformer, including outer body;

[0025] A mounting plate is fixedly provided on the top of the outer body, and an early warning component for extracting air from the inner part of the outer body for smoke detection and early warning is provided on the mounting plate. The early warning component is arranged according to the above-mentioned alarm device.

[0026] The beneficial effects of this program are:

[0027] The early warning component extracts the air inside the transformer to detect the smoke component, and can issue a smoke warning, giving a transformer fire warning in advance. The air inside the transformer is directly extracted for detection to avoid misjudgment of fire.

[0028] Furthermore, an indicator strip is provided on the outer wall of the outer body, and a temperature-sensitive color-changing coating is coated on the indicator strip.

[0029] The beneficial effect is that the temperature-changing coating can sense the corresponding temperature change, and the temperature change can be viewed intuitively and quickly.

[0030] Furthermore, an infrared sensor is provided on the outer body, and the infrared sensor signal is connected to the controller.

[0031] The beneficial effect is that it can detect the surrounding environment in real time and remind people to stay away when someone approaches, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a three-dimensional structural diagram of a transformer fire automatic alarm device according to a first embodiment of the utility model;

[0033] Figure 2 for Figure 1 A magnified structural diagram of the cooling box;

[0034] Figure 3 for Figure 1Longitudinal cross-sectional structural diagram of medium negative pressure fan, cooling box and air intake box;

[0035] Figure 4 for Figure 1 A structural diagram of the air outlet network provided in the middle exhaust duct;

[0036] Figure 5 for Figure 1 Schematic diagram of the structure’s use and installation;

[0037] Figure 6 for Figure 5 The enlarged schematic diagram of point A in the middle;

[0038] Figure 7 It is a three-dimensional structural diagram of the transformer in the second embodiment of the utility model. DETAILED DESCRIPTION

[0039] The following is further explained in detail through specific implementation methods.

[0040] The figure marks in the drawings of the specification include: outer body 1, heat dissipation fins 11, indicator tape 12, filter 13, mounting plate 14, early warning device 15, air intake box 21, negative pressure fan 22, exhaust duct 23, filter element 24, air outlet net 231, mounting plate 25, smoke sensor 26, air intake pipe 271, exhaust pipe 272, cooling assembly 3, first connecting frame 30, cooling box 31, injection port 32, connecting pipe 33, liquid level meter 34, second connecting frame 35, infrared sensor 4.

[0041] Embodiment 1

[0042] Transformer fire automatic alarm device, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown: it includes an early warning component located on the outer body 1 of the transformer, a filter 13 connected to the interior is installed on the outer body 1, the filter 13 can filter the air through the filter net on the hole opened on the outer body 1, so that air without too many impurities can automatically enter, and a mounting plate 14 is fixedly installed on the top of the outer body 1 by screws, and the filter 13 is located on the outer body 1 below the mounting plate 14.

[0043] The early warning component includes an air intake box 21 , a negative pressure fan 22 , an exhaust duct 23 , an early warning device 15 and a smoke sensor 26 .

[0044] like Figure 5 and Figure 6As shown, the air intake box 21 is fixedly mounted on the mounting plate 14 by means of screws and clamps, the air intake box 21 is connected to the interior of the outer body 1 , and the air intake box 21 is connected to the air intake end of the negative pressure fan 22 through the air intake pipe 271 .

[0045] A mounting plate 25 with a hollow structure is connected to the air intake box 21, and a smoke sensor 26 is installed on the mounting plate 25. A filter element 24 for filtering air drawn from the transformer is installed above the smoke sensor 26. The smoke sensor 26 can use an existing sensor, such as an MQ-2 model sensor. The smoke sensor 26 signal is connected to a controller, and the controller can use an existing single-chip chip, such as an STM series or other types of single-chip microcomputers. The controller signal is connected to the early warning device 15, and the early warning device 15 can use an existing sound and light early warning device. When the controller receives a corresponding signal through the pin electrically connected to the smoke sensor 26, it transmits an alarm signal to the early warning device 15 for early warning. The peripheral circuits electrically connected to the controller and each sensor are existing and will not be repeated here.

[0046] like Figure 5 As shown, the exhaust duct 23 is located below the mounting plate 14. The exhaust duct 23 is fixed to the outer body 1 through a first connecting frame 30. The exhaust duct 23 is arranged around the mounting plate 14 to the outside. The exhaust duct 23 extends out of the side wall of the outer body 1. The negative pressure fan 22 is connected to an exhaust pipe 272 that is connected to the exhaust duct 23.

[0047] In other embodiments, an odor sensor is mounted on the mounting plate 25 by means of screws, and the odor sensor signal is connected to the controller. The odor sensor may be an existing methane sensor or other sensor for detecting gas components generated by fire.

[0048] like Figure 3 As shown, a cooling assembly 3 for water-cooling the extracted gas is connected between the exhaust pipe 272 and the exhaust pipe 23, and a connecting pipe 33 is connected to the cooling assembly 3, and the connecting pipe 33 is connected to the exhaust pipe 23. Figure 4 As shown, a plurality of air outlets are opened on the side wall of the exhaust duct 23 facing downward, and an air outlet net 231 is welded on the air outlet. The air outlet of the exhaust duct 23 is aligned with the heat dissipation fins 11 of the transformer body.

[0049] The cooling assembly 3 includes a cooling box 31 containing a cooling medium, a second connecting frame 35 is welded to the outer wall of the cooling box 31, and the second connecting frame 35 is welded to the mounting plate 14. The cooling medium can be water or other liquid media. The connecting pipe 33 is connected to the cooling box 31, and an injection port 32 for the cooling medium is provided on the cooling box 31. The injection port 32 is inclined, and the end of the exhaust pipe 272 is close to the bottom of the cooling box 31.

[0050] In other embodiments, a liquid level meter 34 is installed in the cooling box 31 , and the signal of the liquid level meter 34 is connected to the controller. The liquid level meter 34 can use an existing liquid level sensor.

[0051] The specific implementation process is as follows:

[0052] When in use, the air inside the outer body 1 of the transformer is extracted by the negative pressure fan 22, and the air is extracted through the air inlet box 21. The smoke sensor 26 in the air inlet box 21 detects the smoke or smell in the air, and transmits a signal to the controller, so that the controller sends an early warning signal to the early warning device 15 for early warning prompts. Smoke detection with the air extracted from the transformer can be used to warn before the open fire occurs, which is conducive to reducing the damage to the transformer. Without changing the internal structure layout of the transformer, the internal situation of the transformer is directly detected, and no misjudgment will be caused. Directly extracting the air inside the transformer and then taking in air from the filter 13 can improve the heat dissipation effect of the transformer. After the detection is completed, the air enters the cooling medium in the cooling box 31 through the exhaust pipe 272 for heat exchange, cools and purifies the air extracted from the transformer, reduces the temperature, is more environmentally friendly, and the cooled air is led to the heat dissipation fins 11 to further dissipate the heat of the transformer and improve the heat dissipation effect of the transformer.

[0053] Embodiment 2

[0054] Transformer, such as Figure 7 As shown, the transformer fire automatic alarm device based on the first embodiment includes an outer body 1; a mounting plate 14 is fixed to the top of the outer body 1 by screws, and an early warning component for extracting air from the inner part of the outer body 1 for smoke detection and early warning is installed on the mounting plate 14, and the early warning component is set according to the transformer fire automatic alarm device in the first embodiment. An indicator tape 12 is bonded to the outer wall of the outer body 1, and a temperature-sensitive color-changing coating is coated on the indicator tape 12. An infrared sensor 4 is installed on the outer body 1, and the signal of the infrared sensor 4 is connected to the controller. The infrared sensor 4 can use an existing pyroelectric infrared sensor.

[0055] The transformer uses an early warning component to extract internal air for smoke component detection, and can provide smoke warnings, and provide early warnings of transformer fires. The internal air of the transformer is directly extracted for detection to avoid misjudgment of fire. At the same time, the extracted air is cooled and directed to the heat dissipation fins 11 for cooling, thereby improving the heat dissipation effect of the transformer.

[0056] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A transformer fire automatic alarm device, characterized in that: It includes an early warning component located on the outer body of the transformer, the outer body is provided with a filter communicating with the interior, and a mounting plate is fixedly provided on the top end of the outer body; The early warning component includes an air intake box, a negative pressure fan, an exhaust pipe, an early warning device and a smoke sensor; The air inlet box is located on the mounting plate, the air inlet box is connected to the interior of the outer body, and the air inlet box is connected to the air inlet end of the negative pressure fan through an air inlet pipe; A hollow-shaped mounting plate is connected inside the air intake box, the smoke sensor is located on the mounting plate, the smoke sensor signal is connected to a controller, and the controller signal is connected to an early warning device; The exhaust duct is located below the mounting plate, and the negative pressure fan is connected to an exhaust pipe which is in communication with the exhaust duct.

2. The transformer fire automatic alarm device according to claim 1, characterized in that: An odor sensor is arranged on the mounting plate, and a signal of the odor sensor is connected to a controller.

3. The transformer fire automatic alarm device according to claim 1, characterized in that: A cooling assembly for water-cooling the extracted gas is connected between the exhaust pipe and the exhaust pipeline. The cooling assembly is connected to a connecting pipe, which is connected to the exhaust pipeline.

4. The transformer fire automatic alarm device according to claim 3 is characterized in that: The cooling assembly comprises a cooling box containing a cooling medium, the connecting pipe is connected to the cooling box, an injection port for the cooling medium is provided on the cooling box, the injection port is inclined, and the end of the exhaust pipe is close to the bottom of the cooling box.

5. The transformer fire automatic alarm device according to claim 4, characterized in that: A liquid level meter is arranged in the cooling box, and a signal of the liquid level meter is connected to a controller.

6. The transformer fire automatic alarm device according to claim 3, characterized in that: The exhaust duct is located below the mounting plate, the exhaust duct is fixed to the outer body through a first connecting frame, the exhaust duct is arranged around the outer side of the mounting plate, the exhaust duct extends out of the side wall of the outer body, a plurality of air outlets are opened on the side wall facing downward, the air outlets of the exhaust duct are aligned with the heat dissipation fins of the transformer body, and an air outlet net is fixed on the air outlet.

7. A transformer, including an outer body; characterized in that: A mounting plate is fixedly provided on the top of the outer body, and an early warning component for extracting air from the inner part of the outer body for smoke detection and early warning is provided on the mounting plate. The early warning component is arranged according to the alarm device according to any one of claims 1-5.

8. The transformer according to claim 7, characterized in that: An indicator belt is arranged on the outer wall of the outer body, and a temperature-sensitive color-changing coating is coated on the indicator belt.

9. The transformer according to claim 7, characterized in that: The outer body is provided with an infrared sensor, and the infrared sensor signal is connected to the controller.

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