Fireproof safety dry-type transformer

Abstract

The invention relates to the technical field of transformers, and discloses a fireproof safety type dry-type transformer which comprises a box body, a box door and a dry-type transformer body, by arranging the box body, the box door, the dry-type transformer body, a heat dissipation piece, a dustproof net, a sealing device, a fire extinguishing device, a mounting groove, supporting legs, supporting rods, a positioning piece and an inductor, the heat dissipation piece is firstly opened, fan blades rotate to generate wind power, and the fan blades rotate to generate wind power; when the dry-type transformer is on fire and the temperature is too high, a fire extinguishing device is triggered, the fire extinguishing device extinguishes a fire source, an inductor sends a signal to a control terminal, the control terminal controls a sealing device and a mounting block to drive an upper sealing plate and a lower sealing plate to seal a box body, and fire spreading is avoided; according to the dry-type transformer, rapid and efficient fire prevention and extinguishment operation is concentrated, and the problems that in the prior art, high temperature can be generated during operation of the dry-type transformer, heat cannot be dissipated in time due to the poor heat dissipation capacity of the dry-type transformer, fire disasters occur, personnel cannot fight the fire in time, and large fire disasters can be caused are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers, and in particular relates to a fire-proof and safe dry-type transformer. Background Art

[0002] A dry-type transformer is an electrical device that converts AC voltage and current into different voltage levels to meet the transmission and distribution needs in the power system. Unlike oil-immersed transformers, the insulation material of dry-type transformers does not use liquid insulation (such as transformer oil), but solid insulation materials such as paper, fiber, epoxy resin, etc. This design makes dry-type transformers have advantages in no oil leakage, no environmental pollution, simple maintenance and reliable operation. They are widely used in electricity, energy, transportation, industry and other fields.

[0003] During the use of dry-type transformers, a large amount of heat is generated. If the heat is not dissipated in time, it is easy to cause a fire and the use effect is poor. The problem with the above technology is that in the prior art, the long-term operation of dry-type transformers will generate high temperatures. Due to their poor heat dissipation capacity, the transformer cannot dissipate the heat in time, and the accumulation of heat can easily cause abnormal operation of the transformer or line fire, leading to the occurrence of fire. The initial stage of the fire is the generation of smoke, and this stage is the golden period for the easiest fire extinguishing. Once personnel do not put out the fire in time or extinguish the fire source, the transformer is a flammable electrical appliance. When the wind blows from the outside, it will cause the spread of surrounding ancillary products and cause a larger fire. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a fire-safe dry-type transformer which can overcome the above problems or at least partially solve the above problems.

[0005] The present invention achieves the above object in the following way: A fireproof and safe dry-type transformer comprises a box body, a box door and a dry-type transformer, wherein the box body is vertically distributed; the box door is movably mounted on the front side of the box body, and the dry-type transformer is fixedly mounted on the bottom of the inner cavity of the box body through a bracket; the box body is provided with an air outlet and an air inlet on the left and right sides respectively; a heat sink is also installed on the surface of the box body corresponding to the air inlet; in order to improve the heat dissipation of the dry-type transformer, the heat sink comprises a mounting shell, a driving motor, fan blades and a connecting rod, the surface of the mounting shell is fixedly mounted on the surface of the box body, the fan blades are movably mounted on the inner cavity of the mounting shell, the surface of the fan blades is fixedly mounted on the output end of the driving motor, and the surface of the driving motor is fixedly connected to the inner wall of the mounting shell through a connecting rod; the driving motor can be rotated, and the driving motor drives the fan blades to rotate, and the rotation of the fan blades generates wind force, thereby dissipating the heat of the dry-type transformer; The right side of the surface of the box body is also provided with a heat dissipation outlet, and a dustproof net is installed at the heat dissipation outlet; a closing device is also installed at the inner cavity of the box body corresponding to the air outlet; the closing device comprises a slide rail, a closing plate, a mounting rod and a moving part, the surface of the slide rail is fixedly mounted on the inner wall of the box body, and the closing plate is adapted and can be movably mounted in the inner cavity of the slide rail up and down; the closing plate is divided into an upper closing plate and a lower closing plate; the top of the mounting rod is fixedly mounted on the bottom of the upper closing plate, and the bottom of the mounting rod is fixedly mounted on the top of the lower closing plate; the moving part is used to drive the closing part to move to complete the closing operation of the box body; the upper closing plate can be moved, the upper closing plate drives the mounting rod to move, and the mounting rod drives the lower closing plate to move, and the box body is closed by the upper closing plate and the lower closing plate; in the initial state, the upper closing plate and the lower closing plate respectively complete the blocking of the left heat dissipation outlet and the air outlet; A fire extinguishing device and a sensor are also installed at the top of the inner cavity of the box. The sensor includes a temperature detection sensor and a smoke sensor. The temperature detection sensor is used to detect the real-time temperature in the box, and the smoke sensor is used to detect the fire smoke signal in the box. The fire extinguishing device is configured to drive the motor to start and synchronously open the heat dissipation port and the air outlet when the detected temperature in the box is higher than the first preset temperature value, so as to accelerate the completion of the heat dissipation and ventilation operation of the box. When the detected temperature in the box is higher than the first preset temperature value and the smoke sensor alarm is triggered synchronously, the moving part drives the closing plate to move to complete the closing operation of the box, and at the same time the driving motor is turned off to start the graded fire extinguishing operation.

[0006] In order to ensure that the box is installed horizontally and to ensure the working stability of the transformer, preferably, legs are installed at the bottom of the box, and the legs are connected to the box by threads to adjust the installation horizontal position of the box.

[0007] In order to facilitate the disassembly and installation of the fire extinguishing device, preferably, a fixing seat is also installed in the box body, a mounting groove is opened on one side of the fixing seat, and a support rod is connected and installed on the top of the fire extinguishing device, and the support rod is adapted to be installed in the mounting groove.

[0008] In order to enhance the stability of the fire extinguishing device after installation, preferably, a positioning piece is installed on the right side of the fixing groove, and the positioning piece includes a positioning rod, a positioning ring and a spring. The left side of the positioning ring is fixedly installed on the right side of the fixing seat, and one end of the positioning rod passes through the middle of the positioning ring and extends and is movably installed in the inner cavity of the support rod to form a positioning; one end of the spring is fixedly installed on the right side of the positioning ring, and the other end is fixedly installed on the positioning rod, and the spring is sleeved on the surface of the positioning rod.

[0009] In order to improve the movement of the upper closing plate, preferably, the moving part includes a hydraulic rod, a transmission rod and a mounting block. The surface of the mounting block is fixedly mounted on the surface of the upper closing plate, one end of the transmission rod is fixedly mounted on the top of the mounting block, the other end of the transmission rod is fixedly mounted on the output end of the hydraulic rod, and the bottom of the hydraulic rod is fixedly mounted on the inner wall of the box body. It can be driven by the hydraulic rod, the hydraulic rod drives the transmission rod to move, the transmission rod drives the mounting block to move, and the mounting block drives the upper closing plate to move.

[0010] In order to achieve fire extinguishing in the golden stage and improve the safety of transformer use, preferably, the fire extinguishing device includes a first fire extinguishing component; the first fire extinguishing component includes a first explosion-proof bottle, a first spray head and a first switch valve; the first explosion-proof bottle is installed inverted and connected to the support rod through a fastener; the first spray head is fixedly installed at the end of the first explosion-proof bottle, the first switch valve is arranged at the input end of the first explosion-proof bottle and is located on the inner side of the first spray head, and the first switch valve maintains a signal connection with the smoke sensor so that the detected temperature in the box is higher than the first preset temperature value, and when the smoke sensor alarm is triggered synchronously, the first-level fire extinguishing starts.

[0011] In order to achieve more effective and rapid fire extinguishing in a fire state, improve the safety of transformer use, and avoid greater economic losses in transformer use, preferably, the fire extinguishing device includes a second fire extinguishing component, which includes a second explosion-proof bottle, a second spray head, and a second switch valve; the second explosion-proof bottle is a structure with two ends open, and an upper cavity and a lower cavity are formed inside by a baffle plate; the upper cavity is filled with high-pressure nitrogen; the lower cavity is filled with perfluorohexanone solution; an exhaust pipe is provided on the baffle plate, and a pressure control valve is provided on the exhaust pipe; the end of the upper cavity is connected and sealed by a plug body, and the end of the lower cavity is adapted to install the second spray head, wherein the second spray head adopts a spray structure; the second switch valve is arranged at the end of the lower cavity and is located on the inner side of the second spray head; the second explosion-proof bottle is also connected to the support rod through a fastener; the second switch valve maintains signal connection with the temperature detection sensor and the smoke sensor respectively; so that when the detected temperature in the box is higher than the second preset temperature value and the smoke sensor alarm is triggered synchronously, the secondary fire extinguishing starts.

[0012] In order to better install the explosion-proof bottle, as a consumable part, the explosion-proof bottle should be easy to replace. Preferably, the fastener includes an upper lifting ring, a lower lifting ring, an upper connecting rod, a lower connecting rod and a buckle; the upper lifting ring and the lower lifting ring are both annular and are integrally formed of hard plastic; the upper lifting ring and the lower lifting ring are also provided with corresponding mounting holes, and the mounting holes are connected by fastening bolts; the upper lifting ring is connected and installed with a base plate through the upper connecting rod, and the base plate is fixedly connected to the support rod; and the upper connecting rod is three inclined and evenly distributed in a ring; the lower lifting ring is connected and installed with the buckle through the lower connecting rod, and the buckle is adapted to install the conical output end of the second explosion-proof bottle, and the lower connecting rod is three inclined and evenly distributed in a ring, and the lower connecting rod is retractable.

[0013] In order to better adapt to the installation requirements of explosion-proof bottles of different heights, preferably, the lower connecting rod includes a rotating sleeve and a connecting arm; the connecting arms are two distributed upper and lower, and the rotating sleeve is adapted and rotatably arranged between the two connecting arms; the upper connecting arm is connected to the lower hanging ring, and the lower connecting arm is connected to the buckle.

[0014] In order to better and more intuitively display the box temperature, and to intelligently and automatically complete the safe operation of heat dissipation and fire extinguishing, preferably, an LED control panel is also provided on the outside of the box, and the LED control panel has a built-in PLC controller, which maintains signal connection with the drive motor, hydraulic rod, switch valve and pressure control valve, and has the functions of executing command programming and receiving and outputting signals. Compared with the prior art, the beneficial effects of the present invention are as follows: the structural design of the present invention is reasonable, which improves the safety protection effect of the transformer, and achieves the purpose of efficient heat dissipation and intelligent fire prevention and fire extinguishing; by arranging a box body, a box door, a dry-type transformer, a heat dissipation part, a dustproof net, a closing device, a fire extinguishing device, an installation groove, a leg, a support rod, a positioning part and a sensor, when the temperature detection sensor in the box body detects a temperature higher than a first preset temperature value, the driving motor is started to accelerate the heat dissipation and ventilation operation of the box body, specifically, the heat dissipation part is first opened, and the driving motor drives the fan blades to rotate, and the rotation of the fan blades generates wind force to quickly dissipate heat for the dry-type transformer; when a fire occurs in the dry-type transformer, the temperature is too high to trigger the fire extinguishing device, and the detected temperature in the box body is higher than the first preset temperature value, and the smoke sensor alarm is triggered synchronously, the moving part drives the sealing part to start the smoke sensor alarm. The closing plate moves to complete the closing operation of the box body, and the driving motor is turned off at the same time, and the graded fire extinguishing operation begins; the fire source is extinguished in stages through the first fire extinguishing component and the second fire extinguishing component, the sensor sends a signal to the PLC controller, and the PLC controller controls the start of the closing device, the hydraulic rod drives the transmission rod to move, the transmission rod drives the mounting block to move, and the mounting block drives the upper closing plate and the lower closing plate to close the box body to avoid the problem of external wind accelerating the fire, and effectively complete the spread of the fire, solving the problem in the prior art that the dry-type transformer will generate high temperature during operation, and due to its own poor heat dissipation capacity, the heat cannot be dissipated in time, resulting in the occurrence of fire, and if personnel do not put out the fire in time, it will cause a large fire. Compared with traditional transformers, the dry-type transformer is safer to use, simple to manufacture, low in economic cost, and its service life is increased by about 55%. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure provided by an embodiment of the present invention; Figure 2 is a schematic diagram of a partial three-dimensional structure provided by an embodiment of the present invention; Figure 3 is a schematic diagram of the three-dimensional structure of a heat sink provided by an embodiment of the present invention; Figure 4 is a schematic diagram of the three-dimensional structure of a sealing device provided by an embodiment of the present invention; Figure 5 is a schematic diagram of the three-dimensional structure of a positioning member provided in an embodiment of the present invention; Figure 6 is a cross-sectional view of a first fire extinguishing element provided by an embodiment of the present invention; Figure 7 is a cross-sectional view of a second fire extinguishing element provided by an embodiment of the present invention; Figure 8 is a three-dimensional diagram of a fastening member provided by an embodiment of the present invention; Fig. 9 It is a block diagram of the connection working principle of the PLC controller provided by an embodiment of the present invention.

[0016] In the figure: 1-box; 101-air inlet; 102-air outlet; 103-heat dissipation outlet; 104-fixed seat; 2-box door; 3-dry-type transformer; 4-heat dissipation element; 401-mounting shell; 402-driving motor; 403-fan blade; 404-connecting rod; 5-dust screen; 6-closing device; 601-slide rail; 602-closing plate; 603-mounting rod; 604-moving member; 605-hydraulic rod; 606-transmission rod; 607-mounting block; 608-upper closing plate; 609-lower closing plate; 7-fire extinguishing device; 71-first fire extinguishing element; 711-first explosion-proof bottle; 712-first injection head; 713-first switch valve; 72-second fire extinguishing element; 721-second explosion-proof bottle; 722-second injection Head; 723-second switch valve; 724-upper cavity; 725-lower cavity; 726-exhaust pipe; 727-pressure control valve; 728-plug body; 8-installation groove; 9-leg; 10-support rod; 11-positioning piece; 1101-positioning rod; 1102-positioning ring; 1103-spring; 12-sensor; 1201-temperature detection sensor; 1202-smoke sensor; 13-fastening piece; 1301-upper lifting ring; 1302-lower lifting ring; 1303-upper connecting rod; 1304-lower connecting rod; 1305-buckle; 1306-fastening bolt; 1307-base plate; 1308-rotating sleeve; 1309-connecting arm; 14-LED control panel; 15-PLC controller; 16-blocking plate. DETAILED DESCRIPTION

[0017] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0018] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0019] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0020] like Figures 1 to 5As shown, a fire-proof safety dry-type transformer provided by an embodiment of the present invention includes a box body 1, a box door 2 and a dry-type transformer 3. A leg 9 is installed at the bottom of the box body 1, and the leg 9 is connected to the box body 1 by a thread to adjust the installation horizontal position of the box body 1. The box door 2 is movably installed on the front side of the box body 1 through a hinge. The bottom of the dry-type transformer 3 is fixedly installed at the bottom of the inner cavity of the box body 1 through a bracket. The box body 1 is vertically distributed, and an air outlet 102 and an air inlet 101 are respectively provided on the left and right sides of the box body 1. The air inlet 101 is on the right, and the air outlet 102 is on the left. A heat sink 4 is also installed on the surface of the box body 1 corresponding to the air inlet 101. In order to improve the heat dissipation of the dry-type transformer 3, the heat sink 4 includes a mounting shell 401, a drive motor 402, a fan blade 403 and a connecting rod 404. The surface of the mounting shell 401 is fixedly installed on the surface of the box body 1 and is installed corresponding to the air inlet. The fan blade 403 is movably mounted in the inner cavity of the mounting shell 401, and the surface of the fan blade 403 is fixedly mounted on the output end of the drive motor 402. The surface of the drive motor 402 is fixedly connected to the inner wall of the mounting shell 401 through a connecting rod 404. The drive motor 402 can rotate, and the drive motor 402 drives the fan blade 403 to rotate. The rotation of the fan blade 403 generates wind force, thereby dissipating heat for the dry-type transformer 3. In the initial state, the drive motor 402 is not started, and the box body 1 dissipates heat naturally through the heat dissipation port 103. In order to achieve a better heat dissipation and ventilation effect, a heat sink 4 can also be set at the air outlet 102 to accelerate the circulation of wind flow heat dissipation.

[0021] Wherein, the left and right sides of the box body 1 are provided with heat dissipation ports 103, and the heat dissipation ports 103 are located above the air inlet 101 and the air outlet 102. A dustproof net 5 is installed at the heat dissipation port 103; in this way, the heat dissipation port 103 is used to ensure the heat dissipation of the transformer under normal conditions, and the dustproof net 5 is used to prevent dust and dirt from entering the box body to avoid adverse effects on the transformer. In this embodiment, in order to improve the sealing of the box body 1 and prevent the spread of the fire caused by wind, a closing device 6 is installed in the inner cavity of the box body 1, and the closing device 6 includes a slide rail 601, a closing plate 602, a mounting rod 603 and a moving part 604. In order to improve the sealing effect of the box body 1, there are two slide rails 601, which are vertically distributed on the inner wall of the box body 1. The closing plate 602 is adapted to be movable up and down to set the slide rail 601, and the closing plate 602 is divided into an upper closing plate 608 and a lower closing plate 609; the top of the mounting rod 603 is fixedly mounted on the bottom of the upper closing plate 608, and the bottom of the mounting rod 603 is fixedly mounted on the top of the lower closing plate 609, that is, the upper closing plate 608 and the lower closing plate 609 are connected by the mounting rod 603, and can be specifically welded to form an integral structure. In the initial state, the upper closing plate 608 completes the blocking of the left heat dissipation port 103, and the lower closing plate completes the blocking of the left air outlet 102. The heat dissipation at this time is also the initial state of the transformer operation, and the heat dissipation is small, which is enough to complete the basic heat dissipation operation through the right heat dissipation port 103.

[0022] In this embodiment, the moving member 604 is installed in the inner cavity of the box body 1, and can be driven by the moving member 604, and the moving member 604 drives the closing plate 602 to move as a whole to close the box body 1. At the same time, in order to improve the movement of the upper closing plate, the moving member 604 includes a hydraulic rod 605, a transmission rod 606 and a mounting block 607. The surface of the mounting block 607 is fixedly mounted on the surface of the upper closing plate 608, one end of the transmission rod 606 is fixedly mounted on the top of the mounting block 607, and the other end of the transmission rod 606 is fixedly mounted on the output end of the hydraulic rod 605, and the bottom of the hydraulic rod 605 is fixedly mounted on the inner wall of the box body 1, and can be driven by the hydraulic rod 605, the hydraulic rod 605 drives the transmission rod 606 to move, the transmission rod 606 drives the mounting block 607 to move, and the mounting block 607 drives the upper closing plate 608 to move. The hydraulic rod 605 is an electric hydraulic telescopic rod. When receiving the first signal from the temperature detection sensor 1201, the hydraulic rod 605 extends, thereby driving the closing plate 602 to move upward along the box 1 as a whole. Specifically, the upper closing plate 608 is misaligned with the left heat dissipation port 103, and the lower closing plate 609 is misaligned with the left air outlet 102, thereby making the left heat dissipation port 103 and the air outlet 102 unobstructed. The synchronous start-up drive motor 402 drives the fan blades to rotate, enhances the efficient discharge capacity of heat dissipation, can quickly achieve the temperature reduction in the box, and thus ensure the normal operation of the transformer.

[0023] In this embodiment, a fire extinguishing device 7 and a sensor 12 are also installed at the top of the inner cavity of the box 1. The sensor 12 includes a temperature detection sensor 1201 and a smoke sensor 1202. The sensor 12 is a two-in-one integrated structure and is fixedly installed at the top of the box 1. The temperature detection sensor 1201 is used to detect the real-time temperature in the box 1, and the smoke sensor 1202 is used to detect the fire smoke signal in the box 1. The fire extinguishing device 7 is configured to start the drive motor 402 when the detected temperature in the box 1 is higher than the first preset temperature value, and the left heat dissipation port 103 and the air outlet 102 are opened synchronously to accelerate the heat dissipation and ventilation operation of the box 1. When the detected temperature in the box 1 is higher than the first preset temperature value and the smoke sensor 1202 is triggered to alarm, the moving part 604 drives the closing plate 602 to move to complete the closing operation of the box 1, and the driving motor 402 is closed at the same time, and the graded fire extinguishing operation begins.

[0024] Among them, a fixing seat 104 is also installed at the top of the box body 1, and a mounting groove 8 is opened on one side of the fixing seat 104. A support rod 10 is connected and installed on the top of the fire extinguishing device 7. The support rod 10 is adapted to be installed in the mounting groove 8. Specifically, a protrusion is provided at the end of the support rod 10, and the protrusion is adapted to be installed with the shape of the mounting groove. Such a configuration is convenient for connection, installation, replacement and disassembly. In order to improve the fixation of the support rod 10 and enhance the stability of the position. A positioning member 11 is installed on the right side of the fixing seat 104, and the positioning member 11 includes a positioning rod 1101, a positioning ring 1102 and a spring 1103. The left side of the positioning ring 1102 is fixedly installed on the right side of the mounting groove 8, and one end of the positioning rod 1101 is movably installed in the inner cavity of the support rod 10 through the middle of the positioning ring 1102. A card slot is provided on one side of the support rod 10, and the positioning rod is adapted to form a card-embedded fixed structure. One end of the spring 1103 is fixedly installed on the right side of the positioning ring 1102, and the other end of the spring 1103 is fixedly installed on the other end of the positioning rod 1101. The spring 1103 is sleeved on the surface of the positioning rod 1101 and can be installed in the inner cavity of the support rod 10 through the positioning rod 1101. The support rod 10 is fixed by the cooperation between the positioning rod 1101 and the positioning ring 1102.

[0025] In this embodiment, the fire extinguishing device 7 includes a first fire extinguishing component 71. Specifically, the first fire extinguishing component 71 includes a first explosion-proof bottle 711, a first spray head 712 and a first switch valve 713. The first explosion-proof bottle 711 is installed upside down and connected to the support rod 10 through a fastener 13; the first explosion-proof bottle is filled with a dry powder fire extinguishing medium and a certain air pressure. The first spray head 712 is fixedly installed at the end of the first explosion-proof bottle 711, and the first switch valve 713 is arranged at the input end of the first explosion-proof bottle 711 and is located on the inner side of the first spray head 712. The first switch valve adopts an electromagnetic switch valve. The first switch valve 713 maintains signal connection with the smoke sensor 1202, so that the detected temperature in the box body 1 is higher than the first preset temperature value, and the temperature detection sensor 1201 transmits a trigger signal to the hydraulic rod 605 and the drive motor 402; the hydraulic rod 605 shortens and resets, so that the entire structure of the closing plate 602 moves down and resets (relative to the heat dissipation operation) to complete the closing operation of the closing plate 602 on the heat dissipation port 103 and the air outlet 102; at the same time, the drive motor 402 is turned off to avoid external wind impact. When the smoke sensor 1202 is triggered to alarm, the smoke sensor 1202 triggers a signal to the first switch valve 713, and the dry powder fire extinguishing medium in the first explosion-proof bottle 711 is instantly sprayed toward the transformer to enter the first-level fire extinguishing state.

[0026] In this embodiment, the fire extinguishing device 7 includes a second fire extinguishing component 72, specifically, the second fire extinguishing component 72 includes a second explosion-proof bottle 721, a second spray head 722 and a second switch valve 723. The second explosion-proof bottle 721 is a structure with two ends open, and the upper cavity 724 and the lower cavity 725 are formed inside by the baffle plate 16. Among them, the upper cavity 724 is filled with high-pressure nitrogen; and meets the storage conditions of high-pressure gas. The lower cavity 725 is filled with perfluorohexanone solution; the perfluorohexanone solution has a good performance in fire extinguishing of electrical equipment. The baffle plate 16 is provided with an exhaust pipe 726, one end of the exhaust pipe 726 leads to the upper cavity 724, and the other end leads to the lower cavity 725. The exhaust pipe 726 is provided with a pressure control valve 727; such a setting plays the role of triggering the opening and closing of the start. The end of the upper cavity 724 is connected and sealed by a plug body 728, and the upper cavity 724 maintains a sufficient sealing effect. The end of the lower cavity 725 is adapted to be installed with the second spray head 722, wherein the second spray head 722 adopts a spray structure. The second switch valve 723 is arranged at the end of the lower cavity 725 and is located inside the second spray head 722; the second explosion-proof bottle 721 is also connected to the support rod 10 through the fastener 13; the second switch valve 723 maintains signal connection with the temperature detection sensor 1201 and the smoke sensor 1202 respectively. So that the detected temperature in the box 1 is higher than the second preset temperature value, wherein the second preset temperature value is greater than the first preset temperature value. When the first-level fire extinguishing is triggered and the smoke sensor 1202 is triggered to alarm, the smoke sensor 1202 also transmits the trigger start signal to the second switch valve 723 and the pressure control valve 727. The second switch valve 723 and the pressure control valve 727 are opened at the same time, and the high-pressure gas in the upper cavity 724 will instantly drive the perfluorohexanone solution in the lower cavity 725 through the second spray head 722 of the spray structure to start the second-level fire extinguishing of the transformer; in this way, intelligent and automatic fire monitoring and the first-time fire extinguishing safety protection operation can be realized, which can minimize the economic losses caused by abnormal use of the transformer and increase the safe use life of the transformer.

[0027] In this embodiment, the fastener 13 includes an upper ring 1301, a lower ring 1302, an upper connecting rod 1303, a lower connecting rod 1304 and a buckle 1305. The upper ring 1301 and the lower ring 1302 are both annular and integrally formed of hard plastic; they are used to adapt and install explosion-proof bottles. The upper ring 1301 and the lower ring 1302 are also provided with corresponding mounting holes, and the mounting holes are connected by fastening bolts 1306; such a setting facilitates the pre-installation of the explosion-proof bottle to ensure stability. The upper ring 1301 is connected to a base plate 1307 through the upper connecting rod 1303, and the base plate 1307 is fixedly connected to the support rod 10. The upper connecting rod 1303 is inclined and evenly distributed in a ring. The lower hanging ring 1302 is connected to the buckle 1305 through the lower connecting rod 1304. The buckle 1305 is adapted to install the conical output end of the second explosion-proof bottle 721. The lower connecting rod 1304 is inclined and evenly distributed in a ring.

[0028] In order to better adapt to the installation requirements of explosion-proof bottles of different heights, the lower connecting rod 1304 is retractable. Specifically, the lower connecting rod 1304 includes a rotating sleeve 1308 and a connecting arm 1309. The connecting arms 1309 are two, distributed up and down, and the rotating sleeve 1308 is adapted and rotatably arranged between the two connecting arms 1309; the upper connecting arm 1309 is connected to the lower hanging ring 1302, and the lower connecting arm 1309 is connected to the buckle 1305; in this way, the overall telescopic change of the lower connecting rod 1304 can be achieved by rotating the rotating sleeve 1308, and the connecting arm 1309 and the lower hanging ring 1302 and the buckle 1305 are kept in rotational connection.

[0029] In order to better and more intuitively display the temperature of the box, and to intelligently and automatically complete the safe operation of heat dissipation and fire extinguishing, in this embodiment, an LED control panel 14 is also provided on the outside of the box 1, which is used to display the temperature inside the box 1 in real time and has an alarm prompt function. The LED control panel 14 has a built-in PLC controller 15, which maintains signal connection with the drive motor 402, the hydraulic rod 605, the switch valve and the pressure control valve 727, and has the functions of executing command programming and receiving and outputting signals. The working principle and circuit of the PLC controller of this embodiment are common knowledge to those skilled in the art, and this embodiment mainly protects the mechanical structure, so the specific connection of the PLC controller is not described.

[0030] The working principle of the present invention is as follows: when in use, in the initial state, the upper closing plate 608 completes the blocking of the left heat dissipation port 103, and the lower closing plate 609 completes the blocking of the left air outlet 102. The heat dissipation of the transformer in the initial working stage is mainly completed by the right heat dissipation port 103. When the temperature detection sensor 1201 detects that the temperature in the box body 1 reaches the first preset temperature value, a trigger signal is transmitted to the drive motor 402 of the heat dissipation element 4 and the hydraulic rod 605 of the closing device 6 at the same time. The hydraulic rod 605 extends, thereby driving the overall structure of the closing plate to move upward, so that the heat dissipation port 103 and the air outlet 102 on the left side remain unobstructed with the outside world. The heat dissipation element 4 is opened synchronously, the drive motor 402 rotates, and the drive motor 402 drives the fan blades 403 to rotate. The fan blades 403 rotate to generate wind force, thereby performing efficient and rapid heat dissipation and cooling operations on the dry-type transformer 3.

[0031] When a fire occurs in the dry-type transformer 3, the temperature of the fire source rises and smoke is generated. That is, when the temperature detection sensor 1201 detects that the temperature reaches the first preset temperature value and the smoke sensor 1202 detects the smoke signal, the fire extinguishing device 7 is triggered. Specifically, when the detected temperature in the box body 1 is higher than the first preset temperature value, the temperature detection sensor 1201 transmits a trigger signal to the hydraulic rod 605 and the drive motor 402; the hydraulic rod 605 shortens and resets, so that the overall structure of the closing plate moves down and resets (relative to the heat dissipation operation) to complete the closing operation of the closing plate on the heat dissipation port 103 and the air outlet 102 of the left box body 1. At the same time, the drive motor 402 is turned off to avoid external wind impact, and the box body 1 is closed at this time. When the smoke sensor 1202 is triggered to alarm synchronously, the smoke sensor 1202 triggers a signal to the first switch valve 713, and the dry powder fire extinguishing medium in the first explosion-proof bottle 711 is instantly sprayed to the transformer to start the first-level fire extinguishing.

[0032] When the detected temperature in the box 1 is higher than the second preset temperature value, wherein the second preset temperature value is greater than the first preset temperature value. At the same time as the first-level fire extinguishing is triggered and started, the smoke sensor 1202 is triggered and started to alarm, and the smoke sensor 1202 also transmits the triggering start signal to the second switch valve 723 and the pressure control valve 727. The second switch valve 723 and the pressure control valve 727 are opened at the same time, and the high-pressure gas in the upper cavity 724 of the second explosion-proof bottle 721 will instantly drive the perfluorohexanone solution in the lower cavity 725, and start the second-level fire extinguishing toward the transformer through the second spray head 722 of the spray structure; in this way, through the intelligent operation of graded fire extinguishing, 80% of the fire and fire triggering situations in the existing technology can be completed with high efficiency and safety fire extinguishing operations.

[0033] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent will not depart from the scope of the technical solution of the present invention.

Claims

1. A fire-proof and safe dry-type transformer, characterized in that: The invention comprises a box body (1), a box door (2) and a dry-type transformer body (3), wherein the box body (1) is arranged vertically; the box door (2) is movably mounted on the front side of the box body (1); the dry-type transformer body (3) is fixedly mounted on the bottom of the inner cavity of the box body (1) via a bracket; an air outlet (102) and an air inlet (101) are respectively arranged on the left and right sides of the box body (1); a heat sink (4) is also installed on the surface of the box body (1) corresponding to the air inlet (101); the heat sink (4) comprises an installation The mounting shell (401), a driving motor (402), a fan blade (403) and a connecting rod (404), wherein the surface of the mounting shell (401) is fixedly mounted on the surface of the box body (1), the fan blade (403) is movably mounted in the inner cavity of the mounting shell (401), the fan blade (403) is fixedly mounted on the output end of the driving motor (402), and the surface of the driving motor (402) and the inner wall of the mounting shell (401) are fixedly connected via the connecting rod (404); the box body (1) is provided with a plurality of mounting shells on both sides. A heat dissipation port (103), wherein a dustproof net (5) is installed at the heat dissipation port (103); a closing device (6) is also installed at the inner cavity of the box body (1) corresponding to the air outlet (102); the closing device (6) comprises a slide rail (601), a closing plate (602), a mounting rod (603) and a moving part (604); the surface of the slide rail (601) is fixedly mounted on the inner wall of the box body (1); the closing plate (602) is adapted to be movably mounted on the slide rail (601) so as to be movable up and down; The closing plate (602) is divided into an upper closing plate (608) and a lower closing plate (609); the top of the mounting rod (603) is fixedly mounted on the bottom of the upper closing plate (608), and the bottom is fixedly mounted on the top of the lower closing plate (609); the moving member (604) is used to drive the closing device (6) to move, thereby completing the closing operation of the box body (1); in the initial state, the upper closing plate (608) and the lower closing plate (609) respectively complete the blocking of the left heat dissipation port (103) and the air outlet (102); A fire extinguishing device (7) and a sensor (12) are also installed at the top of the inner cavity of the box (1). The sensor (12) comprises a temperature detection sensor (1201) and a smoke sensor (1202). The temperature detection sensor (1201) is used to detect the real-time temperature in the box (1), and the smoke sensor (1202) is used to detect the fire smoke signal in the box (1). The fire extinguishing device (7) is configured such that when the detected temperature in the box (1) is higher than a first preset temperature value, the drive motor (402) is started, and the heat dissipation port (103) and the air outlet (102) are opened synchronously to accelerate the completion of the heat dissipation and ventilation operation of the box (1). When the detected temperature in the box (1) is higher than the first preset temperature value and the smoke sensor (1202) is triggered to sound an alarm, the moving part (604) drives the closing plate (602) to move to complete the closing operation of the box (1), and at the same time the drive motor (402) is closed to start the staged fire extinguishing operation.

2. A fire-safe dry-type transformer according to claim 1, characterized in that: A support leg (9) is installed at the bottom of the box body (1), and the support leg (9) is connected to the box body (1) via threads to adjust the horizontal position of the box body (1) during installation.

3. A fire-safe dry-type transformer according to claim 2, characterized in that: A fixing seat (104) is also installed in the box body (1), and a mounting groove (8) is provided on one side of the fixing seat (104). A support rod (10) is connected and installed on the top of the fire extinguishing device (7), and the support rod (10) is adapted to be installed in the mounting groove (8).

4. A fire-safe dry-type transformer as claimed in claim 3, characterized in that: A positioning member (11) is installed on the right side of the installation groove (8), and the positioning member (11) includes a positioning rod (1101), a positioning ring (1102) and a spring (1103). The left side of the positioning ring (1102) is fixedly installed on the right side of the fixing seat (104), and one end of the positioning rod (1101) passes through the middle of the positioning ring (1102) and extends to be movably installed in the inner cavity of the support rod (10) to form a positioning; one end of the spring (1103) is fixedly installed on the right side of the positioning ring (1102), and the other end is fixedly installed on the positioning rod (1101), and the spring (1103) is sleeved on the surface of the positioning rod (1101).

5. A fire-safe dry-type transformer as claimed in claim 4, characterized in that: The moving member (604) comprises a hydraulic rod (605), a transmission rod (606) and a mounting block (607); the surface of the mounting block (607) is fixedly mounted on the surface of an upper closing plate (608); one end of the transmission rod (606) is fixedly mounted on the top of the mounting block (607); the other end of the transmission rod (606) is fixedly mounted on the output end of the hydraulic rod (605); the bottom of the hydraulic rod (605) is fixedly mounted on the inner wall of the box body (1) and can be driven by the hydraulic rod (605); the hydraulic rod (605) drives the transmission rod (606) to move; the transmission rod (606) drives the mounting block (607) to move; and the mounting block (607) drives the upper closing plate (608) to move.

6. A fire-safe dry-type transformer as claimed in claim 4, characterized in that: The fire extinguishing device (7) comprises a first fire extinguishing component (71); the first fire extinguishing component (71) comprises a first explosion-proof bottle (711), a first spray head (712) and a first switch valve (713); the first explosion-proof bottle (711) is installed upside down and connected to the support rod (10) via a fastening component (13); the first spray head (712) is fixedly installed at the end of the first explosion-proof bottle (711); the first switch valve (713) is arranged at the input end of the first explosion-proof bottle (711) and is located inside the first spray head (712); the first switch valve (713) maintains a signal connection with the smoke sensor (1202), so that when the detected temperature in the box (1) is higher than a first preset temperature value and the smoke sensor (1202) is triggered to alarm synchronously, the first-level fire extinguishing starts.

7. A fire-safe dry-type transformer according to claim 6, characterized in that: The fire extinguishing device (7) comprises a second fire extinguishing component (72), the second fire extinguishing component (72) comprising a second explosion-proof bottle (721), a second spray head (722) and a second switch valve (723); the second explosion-proof bottle (721) is a structure with two ends open, and the interior is formed with an upper cavity (724) and a lower cavity (725) through a baffle plate (16); the upper cavity (724) is filled with high-pressure nitrogen; the lower cavity (725) is filled with a perfluorohexanone solution; an exhaust pipe (726) is provided on the baffle plate (16), and a pressure control valve (727) is provided on the exhaust pipe (726); the ends of the upper cavity (724) are connected and sealed by a plug body (728); The end of the lower cavity (725) is adapted to be installed with the second spray head (722), wherein the second spray head (722) adopts a spray structure; the second switch valve (723) is arranged at the end of the lower cavity (725) and is located inside the second spray head (722); the second explosion-proof bottle (721) is also connected to the support rod (10) via a fastener (13); the second switch valve (723) respectively maintains signal connection with the temperature detection sensor (1201) and the smoke sensor (1202); so that when the detected temperature in the box (1) is higher than the second preset temperature value and the smoke sensor (1202) is triggered to alarm, secondary fire extinguishing begins.

8. A fire-safe dry-type transformer according to claim 7, characterized in that: The fastener (13) comprises an upper lifting ring (1301), a lower lifting ring (1302), an upper connecting rod (1303), a lower connecting rod (1304) and a buckle (1305); the upper lifting ring (1301) and the lower lifting ring (1302) are both annular and are integrally formed of hard plastic; corresponding mounting holes are also provided on the upper lifting ring (1301) and the lower lifting ring (1302), and the mounting holes are connected by fastening bolts (1306); the upper lifting ring (1301) is connected to the upper connecting rod (1303) ) is connected and installed with a base plate (1307), and the base plate (1307) is fixedly connected to the support rod (10); and the upper connecting rod (1303) is three inclined and evenly distributed in a ring; the lower hanging ring (1302) is connected and installed with the buckle ring (1305) through the lower connecting rod (1304), and the buckle ring (1305) is adapted to install the conical output end of the second explosion-proof bottle (721), and the lower connecting rod (1304) is three inclined and evenly distributed in a ring, and the lower connecting rod (1304) is retractable.

9. A fire-safe dry-type transformer according to claim 8, characterized in that: The lower connecting rod (1304) comprises a rotating sleeve (1308) and a connecting arm (1309); the connecting arms (1309) are two and are distributed in an upper and a lower manner, and the rotating sleeve (1308) is adapted and rotatably arranged between the two connecting arms (1309); the upper connecting arm (1309) is connected to the lower lifting ring (1302), and the lower connecting arm (1309) is connected to the buckle (1305).

10. A fire-proof and safe dry-type transformer according to claim 9, characterized in that: An LED control panel (14) is also provided on the outside of the box (1). The LED control panel (14) has a built-in PLC controller (15). The PLC controller (15) maintains signal connection with the drive motor (402), the hydraulic rod (605), the first switch valve (713), the second switch valve (723) and the pressure control valve (727), and has the functions of executing command programming and receiving and outputting signals.

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