Insulating fireproof dry-type transformer and using method thereof

Abstract

The invention discloses an insulating fireproof dry-type transformer and a using method thereof.The insulating fireproof dry-type transformer comprises a bottom plate, a transformer body is fixedly arranged in the middle of the upper end of the bottom plate, a connecting cable is fixedly arranged on the outer side of the transformer body, and an isolating mechanism used for blocking and preventing fire is arranged between the bottom plate and the transformer body; and a fire extinguishing mechanism for quickly extinguishing the transformer body is arranged at the lower end of the bottom plate. The dry-type transformer is good in use effect, an isolation protection mechanism is additionally arranged for the dry-type transformer, when the dry-type transformer is normally used, the dry-type transformer is exposed outside and can naturally dissipate heat, normal use is guaranteed, and once any form of fire occurs, an external fire disaster or a fire disaster of the transformer can be rapidly isolated through the device.

Description

Technical Field

[0001] The invention relates to the technical field of transformers, and in particular to an insulating fireproof dry-type transformer and a use method thereof. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Its main components are the primary coil, the secondary coil, and the iron core (magnetic core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Its main components are the primary coil, the secondary coil, and the iron core (magnetic core). In electrical equipment and wireless circuits, it is often used to increase or decrease voltage, match impedance, and provide safety isolation. In a generator, whether the coil moves through a magnetic field or the magnetic field moves through a fixed coil, an electric potential can be induced in the coil. In both cases, the value of the magnetic flux remains unchanged, but the amount of magnetic flux intersecting the coil changes. This is the principle of mutual induction. A transformer is a device that uses electromagnetic mutual induction to transform voltage, current, and impedance.

[0003] However, such transformers in the prior art have the following problems when used:

[0004] 1. Due to the heat dissipation requirements, the dry-type transformers in the prior art are mostly exposed to the outside, so the entire device cannot play a good fire prevention role in the event of a fire;

[0005] 2. In the case of fire, such dry-type transformers in the prior art cannot quickly send out an alarm to the outside and cannot notify the staff to find out in time. Therefore, in view of the above problems, an insulated fireproof dry-type transformer and its use method need to be improved. Summary of the invention

[0006] The object of the present invention is to provide an insulated fireproof dry-type transformer and a method of using the same to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an insulated fireproof dry-type transformer and a method for using the same, comprising a base plate, a transformer body is fixedly arranged in the middle of the upper end of the base plate, a connecting cable is fixedly arranged on the outside of the transformer body, an isolation mechanism for blocking fire is arranged between the base plate and the transformer body, and a fire extinguishing mechanism for quickly extinguishing a fire of the transformer body is arranged at the lower end of the base plate.

[0008] Preferably, the isolation mechanism includes a fixed frame, a first movable frame, a second movable frame, a third movable frame, a fourth movable frame, and a top plate, a fixed frame is fixedly arranged on the outer side of the bottom plate, a first movable frame is movably interspersed inside the fixed frame, a second movable frame is movably interspersed inside the first movable frame, a third movable frame is movably interspersed inside the second movable frame, a fourth movable frame is movably interspersed inside the third movable frame, and a top plate is fixedly arranged on the upper end of the transformer body; through the isolation mechanism, in the event of a fire, the transformer body can be quickly deployed to be arranged inside a confined space, if a fire occurs outside, it can be heat-insulated and flame-retardant to prevent burning of the internal structure of the transformer body; if a fire occurs in the transformer body itself, oxygen can be isolated and the fire can be prevented from spreading, thereby fundamentally playing a fire prevention role.

[0009] Preferably, a terminal is fixedly provided on the upper end of the top plate outside the transformer body. The device can conveniently connect external cables by using the terminal. When the transformer is in an isolated state, only the terminal is exposed.

[0010] Preferably, the isolation mechanism further comprises a spring, and the fixed frame, the first movable frame, the second movable frame and the third movable frame are all provided with springs inside, and the springs can utilize their own elastic potential energy to automatically push the first movable frame, the second movable frame and the third movable frame to unfold upward, and make the fixed plate and the top plate fit together, such as Figure 5 As shown, the transformer body can now be arranged inside a sealed space.

[0011] Preferably, a monitoring mechanism for monitoring the temperature and controlling the movable frame to pop up is arranged between the fourth movable frame and the fixed frame, the monitoring mechanism comprises a fixed plate, a fixed block, a glass tube, a limit block, a threaded column and a locking screw, a fixed plate is fixedly arranged on the upper end of the fourth movable frame, a fixed block is fixedly arranged on the surface of the fixed frame, a glass tube is movably interspersed between the fixed plate and the fixed block, a limit block is fixedly arranged on the upper end of the glass tube, a threaded column is fixedly arranged on the lower end of the glass tube, and a locking screw is arranged on the lower end of the threaded column through threaded movably screwing; the spring of the device is always in a compressed state and has the potential energy to pop open, but because the glass tube, the limit block and the locking screw form a fixed pull rod, the fixed plate and the fixed block can be fixed together to counteract the elastic force of the spring, so that the spring cannot pop open, so that the multiple movable frames are initially Figure 1 As shown, they are shrunk together, which can facilitate heat dissipation of the transformer body under normal circumstances.

[0012] Preferably, a fragile groove is provided on the outside of the glass tube, and a thermosensitive liquid is filled inside the glass tube; when a fire occurs, the ambient temperature near the entire transformer body rises rapidly, and at this time, the temperature of the thermosensitive liquid (which can be water) inside the glass tube rises to the evaporation temperature of water, and the pressure inside the glass tube rises rapidly, and finally the glass tube is broken due to the presence of the fragile groove. At this time, the glass tube cannot fix the fixed plate and the fixed block, and then the first movable frame, the second movable frame, the third movable frame, and the fourth movable frame are pushed to unfold step by step under the action of multiple springs, and finally the fixed plate can be tightly attached to the top plate to form a closed space. In this way, the triggering of the device is completely automatic depending on temperature and mechanics, and the fire protection device can still be triggered even if a fire occurs and the power is cut off.

[0013] Preferably, the fire extinguishing mechanism includes a high-pressure dry fire extinguisher, a connecting pipe, a control valve, and a limit rod. High-pressure dry fire extinguishers are fixedly arranged on both sides of the lower end of the fire extinguishing mechanism. A connecting pipe is fixedly arranged on the surface of the high-pressure dry fire extinguisher. The connecting pipe is inserted through the bottom plate and extends to the upper end of the bottom plate. A control valve is arranged on the upper end of the connecting pipe. A limit rod is fixedly arranged on the lower end of the fixed plate. When the isolation state is triggered in the device, the high-pressure dry fire extinguisher can automatically spray fire extinguishing dry powder into the isolation space through the fire extinguishing mechanism. Although fire extinguishing can be carried out after the transformer body is isolated from oxygen, the use of high-pressure dry fire extinguishers can further improve the fire extinguishing efficiency of the device to reduce fire losses. Of course, in addition to high-pressure dry fire extinguishers, hexafluoropropane fire extinguishers can also be used in the device.

[0014] Preferably, a sealing ball is movably arranged inside the control valve, a spring is arranged on the upper end of the sealing ball, and the limit rod is inserted inside the control valve; the sealing ball can play a role in sealing the control valve, and the sealing of the sealing ball needs to rely on the extrusion of the limit rod. The sealing ball is firmly squeezed and fixed by the limit rod to seal the control valve, and when the fixing plate moves up, the limit rod can be pulled out from the control valve; thereby, the high pressure inside the high-pressure dry fire extinguisher can push the sealing ball to move upward, so that dry powder can be sprayed from the control valve to accelerate fire extinguishing.

[0015] Preferably, a control switch is fixedly provided on one side of the lower end of the top plate, and an alarm is fixedly provided on the lower end of the bottom plate. The control switch is electrically connected to the alarm and the transformer body. The operation of the alarm and the transformer body can be controlled by the control switch. When the fixed plate moves up and contacts the control switch, the alarm can be controlled to remotely alarm the control terminal and at the same time control the transformer body to cut off power.

[0016] A method for using an insulated fireproof dry-type transformer; when using the device, the device can be normally connected to an external cable through a wiring terminal, and at this time all movable frames are limited and fixed by a glass tube, and all movable frames are folded together, so as not to affect the heat dissipation of the transformer body;

[0017] Once a fire occurs, no matter what form of fire it is, the ambient temperature near the entire transformer body will rise rapidly. At this time, the temperature of the thermosensitive liquid (which can be water) inside the glass tube rises to the evaporation temperature of water, and the pressure inside the glass tube rises rapidly. Finally, due to the existence of the vulnerable groove, the glass tube breaks. At this time, the glass tube cannot fix the fixed plate and the fixed block. Subsequently, under the action of multiple springs, the first movable frame, the second movable frame, the third movable frame, and the fourth movable frame are pushed to unfold step by step, and finally the fixed plate can be tightly attached to the top plate to form a closed space. In this way, the triggering of the device is completely automatic based on temperature and mechanics. Even if a fire occurs and the power is cut off, the device can still trigger the fire protection.

[0018] And when the fixed plate pops up and moves upward, the limit rod can be pulled out from the inside of the control valve; thereby, the high pressure inside the high-pressure dry fire extinguisher can push the sealing ball upward, so that dry powder can be sprayed from the control valve to accelerate fire extinguishing; although the transformer body can be isolated from oxygen and fire can be extinguished in this way, the use of a high-pressure dry fire extinguisher can further improve the fire extinguishing efficiency of the device to reduce fire losses;

[0019] At the same time, the control switch can be squeezed when the fixed plate moves up, and the operation of the alarm and the transformer body can be controlled by the control switch. When the fixed plate moves up and contacts the control switch, the alarm can be controlled to remotely alarm the control terminal, and the transformer body can be powered off at the same time. This can further improve the use effect of the device. This is the fire prevention, fire extinguishing and alarm use method of the device.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Once a fire occurs in the present invention, no matter what form of fire it is, the ambient temperature near the entire transformer body will rise rapidly. At this time, after the temperature of the thermosensitive liquid inside the glass tube rises to the evaporation temperature of water, the internal pressure of the glass tube rises rapidly. Finally, due to the existence of the vulnerable groove, the glass tube is broken. At this time, the glass tube cannot fix the fixed plate and the fixed block. Subsequently, under the action of multiple springs, the first movable frame, the second movable frame, the third movable frame, and the fourth movable frame are pushed to unfold step by step, and finally the fixed plate can be tightly attached to the top plate to form a closed space. In this way, the triggering of the device is completely automatic depending on temperature and mechanics. Even if a fire occurs and the power is cut off, the device can still trigger the fire protection.

[0022] 2. In the present invention, when the fixed plate pops up and moves upward, the limit rod can be pulled out from the inside of the control valve; thereby, the high pressure inside the high-pressure dry fire extinguisher can push the sealing ball to move upward, so that dry powder can be sprayed from the control valve to accelerate fire extinguishing; although the transformer body can be isolated from oxygen and fire can be extinguished in this way, the use of a high-pressure dry fire extinguisher can further improve the fire extinguishing efficiency of the device to reduce fire losses.

[0023] 3. The present invention can squeeze the control switch when the fixed plate moves up, and the operation of the alarm and the transformer body can be controlled by the control switch. When the fixed plate moves up and contacts the control switch, the alarm can be controlled to remotely alarm the control terminal, and the transformer body can be powered off at the same time, which can further improve the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of an insulated fireproof dry-type transformer of the present invention;

[0025] Figure 2 A bottom view of an insulated fireproof dry-type transformer of the present invention;

[0026] Figure 3 A cross-sectional view of an insulated fireproof dry-type transformer of the present invention;

[0027] Figure 4 The present invention is an insulated fireproof dry-type transformer Figure 3 A front view of

[0028] Figure 5 This is a view of the isolation state of an insulated fireproof dry-type transformer of the present invention;

[0029] Figure 6 This invention is an insulated fireproof dry-type transformer Figure 3 Magnified view at A in the middle;

[0030] Figure 7 This is a view of the internal structure of a control valve in an insulated fireproof dry-type transformer of the present invention;

[0031] In the figure: 1. bottom plate; 2. transformer body; 3. connecting cable; 4. fixed frame; 5. first movable frame; 6. second movable frame; 7. third movable frame; 8. fourth movable frame; 9. fixed plate; 10. top plate; 11. terminal; 12. spring; 13. fixed block; 14. glass tube; 15. limit block; 16. threaded column; 17. locking screw; 18. high-pressure dry fire extinguisher; 19. connecting pipe; 20. control valve; 21. limit rod; 22. sealing ball; 23. spring; 24. control switch; 25. alarm. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-7 The present invention provides a technical solution: an insulated fireproof dry-type transformer, comprising a base plate 1, a transformer body 2 is fixedly arranged in the middle of the upper end of the base plate 1, a connecting cable 3 is fixedly arranged on the outside of the transformer body 2, an isolation mechanism for blocking fire is arranged between the base plate 1 and the transformer body 2, and a fire extinguishing mechanism for quickly extinguishing a fire for the transformer body 2 is arranged at the lower end of the base plate 1.

[0034] The isolation mechanism includes a fixed frame 4, a first movable frame 5, a second movable frame 6, a third movable frame 7, a fourth movable frame 8, and a top plate 10. The fixed frame 4 is fixedly arranged on the outside of the bottom plate 1, the first movable frame 5 is movably interspersed inside the fixed frame 4, the second movable frame 6 is movably interspersed inside the first movable frame 5, the third movable frame 7 is movably interspersed inside the second movable frame 6, the fourth movable frame 8 is movably interspersed inside the third movable frame 7, and the top plate 10 is fixedly arranged on the upper end of the transformer body 2; through the isolation mechanism, in the event of a fire, the transformer body 2 can be quickly deployed to be arranged inside a confined space. If a fire occurs outside, it can be heat-insulated and flame-retardant to prevent the internal structure of the transformer body 2 from burning; if a fire occurs in the transformer body 2 itself, it can isolate oxygen and prevent the fire from spreading, thereby fundamentally playing a fire prevention role;

[0035] A terminal 11 is fixedly provided on the top of the top plate 10 on the outside of the transformer body 2. The terminal 11 can be used to facilitate external cable connection. When the transformer is in an isolated state, only the terminal 11 is exposed.

[0036] The isolation mechanism also includes a spring 23. The fixed frame 4, the first movable frame 5, the second movable frame 6, and the third movable frame 7 are all provided with a spring 23. The spring 23 can utilize its own elastic potential energy to automatically push the first movable frame 5, the second movable frame 6, and the third movable frame 7 to expand upward, and make the fixed plate 9 and the top plate 10 fit together. Figure 5 As shown, at this time, the transformer body 2 can be arranged inside a sealed space;

[0037] A monitoring mechanism for monitoring the temperature and controlling the movable frame to pop up is arranged between the fourth movable frame 8 and the fixed frame 4, and the monitoring mechanism includes a fixed plate 9, a fixed block 13, a glass tube 14, a limit block 15, a threaded column 16, and a locking screw 17. The upper end of the fourth movable frame 8 is fixedly provided with a fixed plate 9, and the surface of the fixed frame 4 is fixedly provided with a fixed block 13. A glass tube 14 is movably interspersed between the fixed plate 9 and the fixed block 13. The upper end of the glass tube 14 is fixedly provided with a limit block 15, and the lower end of the glass tube 14 is fixedly provided with a threaded column 16. The lower end of the threaded column 16 is provided with a locking screw 17 through a threaded movably screwed engagement; the spring 23 of the device is always in a compressed state and has the potential energy to pop open, but because the glass tube 14, the limit block 15, and the locking screw 17 form a fixed pull rod that can fix the fixed plate 9 and the fixed block 13 together to counteract the elastic force of the spring 23, so that the spring 23 cannot pop open, so that the initial multiple movable frames such as Figure 1 As shown, they are shrunk together, which can facilitate heat dissipation of the transformer body 2 under normal circumstances;

[0038] The glass tube 14 is provided with a fragile groove on the outside, and the glass tube 14 is filled with a thermosensitive liquid; when a fire occurs, the ambient temperature near the entire transformer body 2 rises rapidly, and the temperature of the thermosensitive liquid (which can be water) inside the glass tube 14 rises to the evaporation temperature of water, and the internal pressure of the glass tube 14 rises rapidly. Finally, due to the existence of the fragile groove, the glass tube 14 is broken. At this time, the glass tube 14 cannot fix the fixing plate 9 and the fixing block 13, and then the first movable frame 5, the second movable frame 6, the third movable frame 7, and the fourth movable frame 8 are pushed to unfold step by step under the action of multiple springs 23, so that the fixing plate 9 can be close to the top plate 10 to form a closed space. In this way, the triggering of the device is completely automatic based on temperature and mechanics, and the device can still trigger fire protection even if a fire occurs and the power is cut off;

[0039] The fire extinguishing mechanism includes a high-pressure dry fire extinguisher 18, a connecting pipe 19, a control valve 20, and a limit rod 21. The high-pressure dry fire extinguisher 18 is fixedly arranged on both sides of the lower end of the fire extinguishing mechanism. The surface of the high-pressure dry fire extinguisher 18 is fixedly arranged with a connecting pipe 19, and the connecting pipe 19 is inserted through the bottom plate 1 and extends to the upper end of the bottom plate 1. The upper end of the connecting pipe 19 is provided with a control valve 20, and the lower end of the fixed plate 9 is fixedly provided with a limit rod 21. When the isolation state of the device is triggered, the high-pressure dry fire extinguisher 18 can automatically spray fire extinguishing dry powder into the isolation space through the fire extinguishing mechanism; although the transformer body 2 can also be isolated from oxygen to extinguish the fire, the use of the high-pressure dry fire extinguisher 18 can further improve the fire extinguishing efficiency of the device to reduce the fire loss; of course, in addition to the high-pressure dry fire extinguisher 18, the device can also use a hexafluoropropane fire extinguisher;

[0040] The control valve 20 is provided with a sealing ball 22 in a movable engagement therein, a spring 23 is provided at the upper end of the sealing ball 22, and the limit rod 21 is inserted and arranged inside the control valve 20; the sealing ball 22 can seal the control valve 20, and the sealing of the sealing ball 22 needs to rely on the extrusion of the limit rod 21, and the sealing ball 22 is firmly extruded and fixed by the limit rod 21 to seal the control valve 20, and when the fixing plate 9 moves upward, the limit rod 21 can be pulled out from the control valve 20; thereby, the high pressure inside the high-pressure dry fire extinguisher 18 can push the sealing ball 22 to move upward, so that dry powder can be sprayed from the control valve 20 to accelerate fire extinguishing;

[0041] A control switch 24 is fixedly provided on one side of the lower end of the top plate 10, and an alarm is fixedly provided on the lower end of the bottom plate 1. The switch is electrically connected to the alarm and the transformer body 2. The operation of the alarm and the transformer body 2 can be controlled by the control switch 24. When the fixed plate 9 moves up and contacts the control switch 24, the alarm can be controlled to remotely alarm the control terminal and at the same time control the transformer body 2 to cut off power.

[0042] A method for using an insulated fireproof dry-type transformer: When using the device, the external cable can be normally connected through the wiring terminal, and at this time all the movable frames are limited and fixed by the glass tube 14, and all the movable frames are folded together, so as not to affect the heat dissipation of the transformer body 2;

[0043] Once a fire occurs, no matter what form of fire it is, the ambient temperature near the entire transformer body 2 will rise rapidly. At this time, the temperature of the thermosensitive liquid (which can be water) inside the glass tube 14 rises to the evaporation temperature of water, and the internal pressure of the glass tube 14 rises rapidly. Finally, due to the existence of the vulnerable groove, the glass tube 14 is broken. At this time, the glass tube 14 cannot fix the fixing plate 9 and the fixing block 13. Subsequently, under the action of multiple springs 23, the first movable frame 5, the second movable frame 6, the third movable frame 7, and the fourth movable frame 8 are pushed to unfold step by step, and finally the fixing plate 9 can be closely attached to the top plate 10 to form a closed space. In this way, the triggering of the device is completely automatic based on temperature and mechanics. Even if a fire occurs and the power is cut off, the device can still trigger the fire protection.

[0044] And when the fixing plate 9 bounces up and moves upward, the limit rod 21 can be pulled out from the inside of the control valve 20; thereby, the high pressure inside the high-pressure dry fire extinguisher 18 can push the sealing ball 22 upward, so that dry powder can be sprayed from the control valve 20 to accelerate the fire extinguishing; although the transformer body 2 can be isolated from oxygen and fire can be extinguished in this way, the use of the high-pressure dry fire extinguisher 18 can further improve the fire extinguishing efficiency of the device to reduce the fire loss;

[0045] At the same time, when the fixed plate 9 moves up, the control switch 24 can be squeezed, and the operation of the alarm and the transformer body 2 can be controlled by the control switch 24. When the fixed plate 9 moves up and contacts the control switch 24, the alarm can be controlled to remotely alarm the control terminal, and the transformer body 2 can be controlled to cut off power at the same time. This can further improve the use effect of the device. This is the fire prevention, fire extinguishing and alarm use method of the device.

[0046] 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.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An insulated fireproof dry-type transformer, comprising a base plate (1), characterized in that: A transformer body (2) is fixedly arranged in the middle of the upper end of the base plate (1), a connecting cable (3) is fixedly arranged outside the transformer body (2), an isolation mechanism for blocking fire is arranged between the base plate (1) and the transformer body (2), and a fire extinguishing mechanism for quickly extinguishing a fire in the transformer body (2) is arranged at the lower end of the base plate (1).

2. The insulated fireproof dry-type transformer according to claim 1, characterized in that: The isolation mechanism comprises a fixed frame (4), a first movable frame (5), a second movable frame (6), a third movable frame (7), a fourth movable frame (8), and a top plate (10); the fixed frame (4) is fixedly arranged on the outside of the bottom plate (1); the first movable frame (5) is movably interspersed inside the fixed frame (4); the second movable frame (6) is movably interspersed inside the first movable frame (5); the third movable frame (7) is movably interspersed inside the second movable frame (6); the fourth movable frame (8) is movably interspersed inside the third movable frame (7); and the top plate (10) is fixedly arranged on the upper end of the transformer body (2).

3. The insulated fireproof dry-type transformer according to claim 2, characterized in that: A terminal post (11) is fixedly arranged on the upper end of the top plate (10) outside the transformer body (2).

4. The insulated fireproof dry-type transformer according to claim 2, characterized in that: The isolation mechanism also includes a spring (23), and the fixed frame (4), the first movable frame (5), the second movable frame (6), and the third movable frame (7) are all provided with a spring (23) inside.

5. The insulated fireproof dry-type transformer according to claim 1, characterized in that: A monitoring mechanism for monitoring the temperature control of the movable frame from springing up is arranged between the fourth movable frame (8) and the fixed frame (4), the monitoring mechanism comprising a fixed plate (9), a fixed block (13), a glass tube (14), a limit block (15), a threaded column (16), and a locking screw (17). The upper end of the fourth movable frame (8) is fixedly provided with a fixed plate (9), the surface of the fixed frame (4) is fixedly provided with a fixed block (13), a glass tube (14) is movably interlaced between the fixed plate (9) and the fixed block (13), the upper end of the glass tube (14) is fixedly provided with a limit block (15), the lower end of the glass tube (14) is fixedly provided with a threaded column (16), and the lower end of the threaded column (16) is provided with a locking screw (17) through a threaded movably screwed connection.

6. The insulated fireproof dry-type transformer according to claim 5, characterized in that: A fragile groove is arranged on the outside of the glass tube (14), and a heat-sensitive liquid is filled inside the glass tube (14).

7. The insulated fireproof dry-type transformer according to claim 5, characterized in that: The fire extinguishing mechanism comprises a high-pressure dry fire extinguisher (18), a connecting pipe (19), a control valve (20), and a limit rod (21). The high-pressure dry fire extinguisher (18) is fixedly arranged on both sides of the lower end of the fire extinguishing mechanism. The surface of the high-pressure dry fire extinguisher (18) is fixedly arranged with a connecting pipe (19). The connecting pipe (19) penetrates through the bottom plate (1) and extends to the upper end of the bottom plate (1). The upper end of the connecting pipe (19) is provided with a control valve (20). The lower end of the fixed plate (9) is fixedly provided with a limit rod (21).

8. The insulated fireproof dry-type transformer according to claim 1, characterized in that: A sealing ball (22) is movably engaged inside the control valve (20), a spring (23) is provided at the upper end of the sealing ball (22), and the limit rod (21) is inserted into the control valve (20).

9. The insulated fireproof dry-type transformer according to claim 1, characterized in that: A control switch (24) is fixedly provided on one side of the lower end of the top plate (10), an alarm (25) is fixedly provided on the lower end of the bottom plate (1), and the control switch (24) is electrically connected to the alarm (25) and the transformer body (2).

10. The method for using an insulated fireproof dry-type transformer according to claims 1-9, characterized in that: The method for using the device is that when in use, the device can be connected to an external cable normally through the wiring terminal, and at this time, all the movable frames are limited and fixed by the glass tube (14), and all the movable frames are folded together, so as not to affect the heat dissipation of the transformer body (2); Once a fire occurs, no matter what kind of fire it is, the ambient temperature near the entire transformer body (2) will rise rapidly. At this time, the temperature of the thermosensitive liquid (which may be water) inside the glass tube (14) rises to the evaporation temperature of water, and the internal pressure of the glass tube (14) rises rapidly. Finally, due to the existence of the vulnerable groove, the glass tube (14) breaks. At this time, the glass tube (14) cannot fix the fixed plate (9) and the fixed block (13). Subsequently, under the action of multiple springs (23), the first movable frame (5), the second movable frame (6), the third movable frame (7), and the fourth movable frame (8) are pushed to unfold step by step, and finally the fixed plate (9) can be closely attached to the top plate (10) to form a closed space. In this way, the triggering of the device is completely automatic based on temperature and mechanics. Even if a fire occurs and the power is cut off, the device can still trigger the fire protection. Furthermore, when the fixing plate (9) pops up and moves upward, the limit rod (21) can be pulled out from the inside of the control valve (20); thereby, the high pressure inside the high-pressure dry fire extinguisher (18) can push the sealing ball (22) upward, so that dry powder can be sprayed from the control valve (20) to accelerate the fire extinguishing; although the transformer body (2) can be isolated from oxygen and fire extinguishing can be carried out in this way, the use of the high-pressure dry fire extinguisher (18) can further improve the fire extinguishing efficiency of the device to reduce the fire loss; At the same time, when the fixing plate (9) moves upward, the control switch (24) can be squeezed, and the operation of the alarm and the transformer body (2) can be controlled by the control switch (24). When the fixing plate (9) moves upward and contacts the control switch (24), the alarm can be controlled to remotely send an alarm to the control terminal, and the transformer body (2) can be controlled to cut off power. In this way, the use effect of the device can be further improved. This is the fire prevention, fire extinguishing and alarm use method of the device.

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