Transformer safety protection device

Abstract

The present disclosure belongs to the technical field of nuclear power and particularly relates to a transformer safety protection device. The transformer safety protection device is provided with a first mounting groove on the side wall of a protection shell, the inside of the first mounting groove is provided with a protection anti-collision assembly, and a touch pressure assembly is slidingly mounted in the inside of the protection shell. The protection anti-collision assembly, the clamping assembly and the touch pressure assembly are arranged in the inside, so that a reverse buffering force can be provided at the moment of impact, the impact force can be greatly weakened, the structure and the internal transformer can be effectively protected, the structure adopts a hidden design, is in a hidden state when not triggered, does not cause the thickness of the equipment shell to increase, greatly reduces the overall volume of the equipment, only needs a small mounting area, and has good use effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of nuclear power, and particularly relates to a transformer safety protection device. BACKGROUND

[0002] A transformer is a common power structure, which can be represented as a device for changing alternating voltage by using the principle of electromagnetic induction, and the main components are a primary coil, a secondary coil and a core. The main functions of the transformer include: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization, etc. The structure of the transformer is precise and easy to be damaged, and the transformer is easy to heat and cause explosion and combustion in the state of overload and short circuit, so safety protection is needed for the transformer.

[0003] The safety protection structure in the related art generally sets a protection plate outside the transformer to achieve anti-collision protection for the internal transformer, but due to the thickness problem of the anti-collision structure, it will increase the volume of the overall protection structure, affect the installation of the transformer, and the use effect is not good. In view of this, it is urgent to improve the safety protection structure of the transformer to solve the above problems. SUMMARY

[0004] In order to overcome the problems in the related art, a transformer safety protection device is provided.

[0005] According to an aspect of an embodiment of the present disclosure, a transformer safety protection device is provided, which comprises: a protection shell, a protection anti-collision assembly, a plurality of touch pressure assemblies, and a plurality of clamping assemblies.

[0006] The outer side wall of the protection shell is provided with a first mounting groove, and the top of the protection shell is provided with a second mounting groove. The inside of the second mounting groove is used for placing a transformer. A top cover is provided on the top groove opening of the second mounting groove, which can be opened and closed. The protection shell, the first mounting groove and the second mounting groove form a hollow inner cavity. A plurality of through holes are formed in the groove opening edge of the first mounting groove.

[0007] The protection anti-collision assembly comprises an anti-collision protection plate and a plurality of protection springs. One end of each protection spring is fixedly connected with the groove bottom of the first mounting groove, and the other end of each protection spring is fixedly connected with the anti-collision protection plate. A plurality of threaded holes are formed in the side surface of the anti-collision protection plate.

[0008] For each touch pressure assembly, the touch pressure assembly comprises a sliding shaft, an engagement shaft and a sleeving spring. One end of the sliding shaft is located in the inner cavity and is fixedly connected with the side wall of the second mounting groove. The engagement shaft and the sleeving spring are respectively sleeved on the outer part of the sliding shaft. One end of the sleeving spring is fixedly connected with the side wall of the second mounting groove, and the other end of the sleeving spring is fixedly connected with one end of the engagement shaft. The other end of the engagement shaft penetrates through a through hole and is located outside the protection shell.

[0009] For each clamping assembly, the clamping assembly comprises a slide rod, a threaded clamping shaft and an engaging sleeve, one end of the slide rod is located in the inner cavity and fixedly connected with the inner wall of the protective shell, the threaded clamping shaft is sleeved outside the slide rod, one end of the threaded clamping shaft is threadedly connected with a threaded hole in the side of the anti-collision protection plate through the side wall of the first installation slot, the outside of the threaded clamping shaft is sleeved with the engaging sleeve at the position in the inner cavity, the inner wall of the engaging sleeve is fixedly connected with the threaded clamping shaft, and the engaging sleeve and an engaging shaft are connected with each other, each threaded clamping shaft limits the anti-collision protection plate in the first installation slot, and multiple protection springs are pressed and deformed;

[0010] If the side of the anti-collision protection plate is impacted by external force, each engaging shaft moves towards the side wall of the second installation slot under the action of the impact force, each engaging shaft drives the engaged engaging sleeve to rotate, and then drives the threaded clamping shaft threadedly connected with the engaging sleeve to rotate, so that each threaded clamping shaft is rotated out of the connected threaded hole, at this time, the anti-collision protection plate loses the limiting effect, and the multiple protection springs push the anti-collision protection plate out, and the pushed-out anti-collision protection plate can buffer the impact of external force.

[0011] In a possible implementation, one first installation slot is formed in each side of the protective shell, one protection anti-collision assembly, multiple touch pressure assemblies and multiple clamping assemblies corresponding to the protection anti-collision assembly are installed in each first installation slot.

[0012] In a possible implementation, the inner wall of the engaging sleeve of each clamping assembly is threadedly connected with the threaded clamping shaft of the clamping assembly.

[0013] In a possible implementation, the touch pressure assemblies are uniformly distributed around the first installation slot, and the clamping assemblies are uniformly distributed around the anti-collision protection plate.

[0014] In a possible implementation, the protection anti-collision assembly further comprises an expansion assembly, and the expansion assembly comprises multiple spring rods and an expansion protection plate.

[0015] An inner built-in groove is formed in the side of the anti-collision protection plate, one end of each spring rod is fixedly connected with the groove bottom of the inner built-in groove, and the other end of each spring rod is fixedly connected with one side of the expansion protection plate.

[0016] When the anti-collision protection plate is limited in the first installation slot, the expansion protection plate is limited in the inner built-in groove, and each spring rod is compressed.

[0017] When the anti-collision protection plate is pushed out of the first installation slot, the expansion protection plate is pushed out of the inner built-in groove by each spring rod, and the area of the anti-collision protection plate is increased.

[0018] In a possible implementation, the anti-collision protection plate is provided with a plurality of built-in grooves on the side surface, and each built-in groove is provided with an expansion assembly.

[0019] In a possible implementation, the device further comprises a gas storage tank, a gas guide pipe and a self-control displacement assembly.

[0020] The gas storage tank is filled with pressurized carbon dioxide gas, and is fixedly installed on the outer side of the protection shell. The gas guide pipe passes through the inner cavity of the device, and one end of the gas guide pipe is connected with the gas outlet of the gas storage tank, and the other end of the gas guide pipe is connected with the gas inlet of the side wall of the second installation groove.

[0021] The self-control displacement assembly comprises a sliding block and an expansion block. The sliding block is slidingly connected to the side wall of the second installation groove and blocks the gas inlet. The expansion block is fixedly connected to the side wall of the second installation groove and abuts against the sliding block. The expansion block is filled with graphite particles.

[0022] In the case of heat generation or combustion of the transformer, the heat generated or combusted by the transformer is conducted to the expansion block. The graphite particles in the expansion block are heated and expanded, so that the volume of the expansion block is expanded. The expanded expansion block can push the sliding block to displace. After the displacement of the sliding block, the gas inlet of the protection shell is no longer blocked, so that the pressurized carbon dioxide gas in the gas storage tank is guided into the interior of the protection shell through the gas guide pipe, thereby preventing the combustion of the transformer.

[0023] In a possible implementation, the device further comprises a storage air bag. The storage air bag is filled with a mixture of pressurized gas and fire extinguishing particles, and is fixedly connected to the side wall of the second installation groove and opposite to the sliding block.

[0024] The sliding block is provided with a needle tip towards the storage air bag.

[0025] In the case of heat generation or combustion of the transformer, the heat generated or combusted by the transformer is conducted to the expansion block. The graphite particles in the expansion block are heated and expanded, so that the volume of the expansion block is expanded. The expanded expansion block can push the sliding block to displace. After the displacement of the sliding block, the gas inlet of the protection shell is no longer blocked, so that the pressurized carbon dioxide gas in the gas storage tank is guided into the second installation groove through the gas guide pipe, and the needle tip of the sliding block pierces the storage air bag, so that the mixture in the storage air bag is exploded and spread in the second installation groove, thereby preventing the combustion of the transformer.

[0026] In a possible implementation, a plurality of heat dissipation holes are arranged on the side wall of the protection shell.

[0027] In a possible implementation, a plurality of supporting bottom legs are fixedly installed on the bottom of the protection shell.

[0028] The transformer safety protection device has the advantages that when the device is subjected to external impact, the impact can press the engagement shaft of the touch pressure assembly, the engagement shaft can drive the engagement sleeve to rotate, the threaded hole in the engagement sleeve is threadedly connected with the threaded shaft, and thus the threaded shaft can be automatically moved out when the engagement sleeve rotates, the anti-collision protection plate loses the limiting effect, the protection spring can push the anti-collision protection plate out, the anti-collision protection plate can effectively buffer the external impact, the protection anti-collision assembly, the plurality of touch pressure assemblies and the plurality of clamping assemblies are cooperated, an opposite buffering force can be provided at the moment when the impact occurs, the impact force is greatly weakened, the structure and the transformer in the structure are effectively protected, in addition, the protection anti-collision assembly, the plurality of touch pressure assemblies and the plurality of clamping assemblies are designed in a hidden mode, are in a hidden state when not triggered, do not increase the thickness of the equipment shell, greatly reduce the overall volume of the equipment, only need a small installation area, and have good use effect. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a perspective view of a transformer safety protection device according to an example embodiment.

[0030] Figure 2 It is an exploded view of a transformer safety protection device according to an example embodiment.

[0031] Figure 3 It is a schematic view of a protection anti-collision assembly, a touch pressure assembly and a clamping assembly according to an example embodiment.

[0032] Figure 4 It is a schematic view of a touch pressure assembly and a clamping assembly according to an example embodiment.

[0033] Figure 5 It is a schematic view of a gas storage tank and a gas guide pipe according to an example embodiment.

[0034] Figure 6 It is a schematic view of a gas storage bag according to an example embodiment.

[0035] Figure 7 It is a schematic view of a self-control displacement assembly according to an example embodiment.

[0036] In the drawings:

[0037] 1, top cover; 2, protection shell; 3, touch pressure assembly; 31, sliding shaft; 32, sleeve spring;

[0038] 33, engaging shaft; 4, first installation slot; 5, protection anti-collision assembly; 51, anti-collision protection plate;

[0039] 52, protection spring; 53, built-in slot; 54, spring rod; 55, expansion protection plate; 6, heat dissipation slot;

[0040] 7, transformer; 8, second installation slot; 9, storage air bag; 10, self-control displacement assembly;

[0041] 101, needle tip; 102, sliding block; 103, graphite particle; 104, expansion block; 11, gas storage tank;

[0042] 12, air guide pipe; 13, clamping assembly; 131, engaging sleeve; 132, sleeve frame; 133, threaded clamping shaft; 134, sliding rod; 14, injection pipe. DETAILED DESCRIPTION

[0043] The application will be further described in detail below with reference to the accompanying drawings and specific examples.

[0044] Figure 1 is a perspective view of a transformer safety protection device according to an exemplary embodiment, Figure 2 is an exploded view of a transformer safety protection device according to an exemplary embodiment. Figure 3 is a schematic view of a protection anti-collision assembly, a touch pressure assembly and a clamping assembly according to an exemplary embodiment, Figure 4 is a schematic view of a touch pressure assembly and a clamping assembly according to an exemplary embodiment. As Figures 1 to 4 shown: the transformer safety protection device comprises a protection shell 2, a protection anti-collision assembly 5, a plurality of touch pressure assemblies 3, and a plurality of clamping assemblies 13, each touch pressure assembly 3 corresponds to a clamping assembly 13.

[0045] The outer side wall of the protection shell 2 is provided with a first installation slot 4, and the top of the protection shell 2 is provided with a second installation slot 8, the inside of the second installation slot 8 is used to place a transformer 7, and the top slot opening of the second installation slot 8 is provided with a top cover 1 which can be opened and closed, the top cover 1 can be opened, the transformer 7 is loaded into the second installation slot 8, and the top cover 1 is closed. The protection shell 2, the first installation slot 4 and the second installation slot 8 form a hollow inner cavity, and a plurality of through holes are formed in the slot opening edge of the first installation slot 4;

[0046] The protection anti-collision assembly 5 comprises an anti-collision protection plate 51 and a plurality of protection springs 52, one end of each protection spring 52 is fixedly connected with the slot bottom of the first installation slot 4, the other end of each protection spring 52 is fixedly connected with the anti-collision protection plate 51, and a plurality of threaded holes are formed in the side surface of the anti-collision protection plate 51;

[0047] For each touch pressure assembly 3, the touch pressure assembly 3 comprises a sliding shaft 31, an engaging shaft 33 and a sleeving spring 32, one end of the sliding shaft 31 is located in the inner cavity of the device and is fixedly connected with the side wall of the second mounting groove 8, the outer part of the sliding shaft 31 is sleeved with the engaging shaft 33 and the sleeving spring 32 respectively, one end of the sleeving spring 32 is fixedly connected with the side wall of the second mounting groove 8, the other end of the sleeving spring 32 is fixedly connected with one end of the engaging shaft 33, the other end of the engaging shaft 33 passes through a through hole and is located outside the protective shell 2;

[0048] For each clamping component 13, the clamping component 13 comprises a sliding rod 134, a threaded clamping shaft 133 and an engaging sleeve 131, one end of the sliding rod 134 is located in the inner cavity and is fixedly connected with the inner wall of the protective shell 2, the threaded clamping shaft 133 is slidably sleeved on the outside of the sliding rod 134, the threaded clamping shaft 133 passes through the side wall of the first mounting groove 4, a part of the threaded clamping shaft 133 is located in the inner cavity and the remaining part is located in the first mounting groove 4, one end of the threaded clamping shaft 133 is threadedly connected with a threaded hole on the side of the anti-collision protection plate 51, the engaging sleeve 131 is sleeved on the outside of the threaded clamping shaft 133 and is fixedly connected with the threaded clamping shaft 133 (for example, the engaging sleeve 131 can be threadedly connected or welded with the threaded clamping shaft 133), the engaging sleeve 131 is located in the inner cavity of the device (for example, the inner wall of the protective shell 2 can be provided with a sleeve frame 132 for supporting the engaging sleeve 131), and the engaging sleeve 131 is connected with the engaging shaft 33 located in the inner cavity. In the case that the touch pressure assembly 3 is not triggered, each threaded clamping shaft 133 limits the anti-collision protection plate 51 in the first mounting groove 4, and makes the plurality of protection springs 52 be pressed and deformed.

[0049] If the side where the anti-collision protection plate 51 is located is impacted by external force, each engaging shaft 33 moves towards the side wall of the second mounting groove 8 under the action of impact force, each engaging shaft 33 drives the engaging sleeve 131 engaged with the engaging shaft 33 to rotate, and in turn drives the threaded clamping shaft 133 threadedly connected with the engaging sleeve 131 to rotate, so that each threaded clamping shaft 133 is rotated out of the connected threaded hole, at this time the anti-collision protection plate 51 loses the limiting effect, and the plurality of protection springs 52 pushes the anti-collision protection plate 51 out, and the pushed-out anti-collision protection plate 51 can buffer the impact of external force.

[0050] In the transformer safety protection device of the present disclosure, when the device is subjected to a certain external impact, the impact can press the engagement shaft of the touch pressure assembly, and the moving engagement shaft can drive the engagement sleeve to rotate. Since the engagement sleeve is internally provided with a threaded hole and a threaded clamping shaft, the threaded clamping shaft in the engagement sleeve can be automatically turned out when the engagement sleeve rotates. At this time, the anti-collision protection plate loses the limiting effect, and the protection spring can push the anti-collision protection plate out. The pushed-out anti-collision protection plate can effectively buffer the external impact. Through the cooperation between the protection anti-collision assembly, the plurality of touch pressure assemblies, and the plurality of clamping assemblies, a reverse buffering force can be provided at the moment of impact, thereby greatly weakening the impact force and effectively protecting the structure and the internal transformer. In addition, the protection anti-collision assembly, the plurality of touch pressure assemblies, and the plurality of clamping assemblies are designed in a hidden manner. When not triggered, they are in a hidden state and do not increase the thickness of the equipment shell, greatly reducing the overall volume of the equipment and requiring only a small installation area, with good use effect.

[0051] In a possible implementation, a first mounting groove 4 is formed on each side of the protection shell 2, and a protection anti-collision assembly 5, a plurality of touch pressure assemblies 3, and a plurality of clamping assemblies 13 corresponding to the protection anti-collision assembly 5 are mounted in each first mounting groove 4. It should be noted that the first mounting groove 4 and the protection anti-collision assembly 5, the plurality of touch pressure assemblies 3, and the plurality of clamping assemblies 13 corresponding thereto can be arranged according to the need for impact protection at positions that are easily subjected to impact. The number and mounting positions of the first mounting groove 4 and the protection anti-collision assembly 5, the plurality of touch pressure assemblies 3, and the plurality of clamping assemblies 13 are not limited in the present disclosure.

[0052] In a possible implementation, the touch pressure assemblies 3 are uniformly distributed around the first mounting groove 4, and the clamping assemblies 13 are uniformly distributed around the anti-collision protection plate 51. In this way, the anti-collision protection plate 51 can be more uniformly stressed.

[0053] In a possible implementation, the protection anti-collision assembly 5 further includes an expansion assembly, the expansion assembly includes a plurality of spring rods 54 and an expansion protection plate 55, an inner groove 53 is formed on the side of the anti-collision protection plate 51, one end of each spring rod 54 is fixedly connected to the groove bottom of the inner groove 53, and the other end of each spring rod 54 is fixedly connected to one side of the expansion protection plate 55. When the anti-collision protection plate 51 is limited in the first mounting groove 4, the expansion protection plate 55 is limited in the inner groove 53, and each spring rod 54 is compressed. When the anti-collision protection plate 51 is pushed out of the first mounting groove 4, the expansion protection plate 55 is pushed out of the inner groove 53 by each spring rod 54, so as to increase the area of the anti-collision protection plate 51.

[0054] The present disclosure sets the expansion protection plate in the protection anti-collision assembly, when impact occurs, the expansion protection plate in the anti-collision protection plate can be effectively ejected through the spring rod after the anti-collision protection plate automatically ejects, the expansion protection plate after ejection can effectively expand the protection area of the protection anti-collision assembly, thereby the effect of expanding the protection area can be realized while effectively realizing the anti-collision protection of the equipment, and the overall protection effect of the device is further improved.

[0055] In a possible implementation, a plurality of built-in grooves are formed in the side of the anti-collision protection plate, and one expansion assembly is installed in each built-in groove. It should be noted that, according to the actual needs of the protection area, an expansion protection plate of any shape can be arranged on part or all of the side of the anti-collision protection plate, and the shape, position and number of the expansion protection plate are not limited in the present disclosure.

[0056] Figure 5 is a schematic view of a gas storage tank and a gas guide pipe according to an example embodiment. Figure 7 is a schematic view of a self-control displacement assembly according to an example embodiment. As shown in Figure 1 , Figure 2 and Figure 5 and Figure 7 , the device further comprises a gas storage tank 11, a gas guide pipe 12 and a self-control displacement assembly 10; the gas storage tank 11 is filled with pressurized carbon dioxide gas, and is fixedly installed on the outside of the protection shell 2; the gas guide pipe 12 passes through the inner cavity of the device, one end of the gas guide pipe 12 is connected with the gas outlet of the gas storage tank 11, and the other end of the gas guide pipe 12 is connected with the gas inlet of the side wall of the second mounting groove 8.

[0057] The self-control displacement assembly 10 comprises a sliding block 102 and an expansion block 104; the sliding block 102 is slidingly connected at the side wall of the second mounting groove 8 and blocks the gas inlet; the expansion block 104 is fixedly connected at the side wall of the second mounting groove 8 and abuts against the sliding block 102; and the expansion block 104 is filled with graphite particles 103.

[0058] In the case of heat generation or combustion of the transformer 7, the heat generated or combusted by the transformer 7 is conducted to the expansion block 104, the graphite particles 103 in the expansion block 104 are heated to expand, so that the volume of the expansion block 104 expands, the expansion block 104 after expansion can push the sliding block 102 to displace, and after the sliding block 102 displaces, the gas inlet of the protection shell 2 is no longer blocked, so that the pressurized carbon dioxide gas in the gas storage tank 11 is guided into the inside of the protection shell 2 through the gas guide pipe 12, thereby preventing the transformer 7 from combusting.

[0059] Figure 6 is a schematic view of a gas storage bag according to an example embodiment. As shown in Figure 1 ,Figure 6 and Figure 7 As shown, the device further includes a storage airbag 9, which is filled with a mixture of pressurized gas and fire extinguishing particles. The storage airbag 9 is fixedly connected to the side wall of the second mounting groove 8, opposite to the slider 102;

[0060] The slider 102 is provided with a needle tip 101 at a position facing the storage air bag 9; when the transformer 7 is heated or burned, the heat generated by the heating or burning of the transformer 7 is transferred to the expansion block 104, and the graphite particles 103 in the expansion block 104 expand due to the heat, thereby expanding the volume of the expansion block 104. The expanded expansion block 104 can push the slider 102 to move. After the slider 102 moves, the air inlet of the protective shell 2 is unobstructed, so that the pressurized carbon dioxide gas in the air storage box 11 is introduced into the second installation groove 8 through the air guide pipe 12, and the needle tip 101 of the slider 102 pierces the storage air bag 9, so that the mixture in the storage air bag 9 explodes and spreads in the second installation groove 8. The dual effects of the two can more efficiently prevent and extinguish fires.

[0061] The present invention is provided with an air storage box and a material storage air bag, and is also provided with an automatic displacement assembly. During the use of the transformer installed inside the structure, if some spontaneous combustion occurs, the high temperature can be quickly transferred to the expansion block of the automatic displacement assembly, and the graphite particles in the expansion block will expand due to the heat, thereby expanding the volume of the expansion block. The expanded expansion block can effectively push the slider at one end to move. After the slider moves, the air guide hole of the protective shell is no longer blocked. At this time, the high-temperature carbon dioxide gas in the air storage box will be quickly introduced into the interior of the protective shell through the air guide pipe, and the carbon dioxide can prevent the continued occurrence of spontaneous combustion. At the same time, the displacement slider can also synchronously drive the needle tip at one end to move, and the needle tip will puncture the material storage air bag. At this time, the high-pressure gas in the material storage air bag and the fire extinguishing matrix will explode and spread on the fire point to prevent combustion. The two cooperate with each other, which can greatly improve the overall fire prevention and fire retardant effect of the structure. Combined with the anti-collision effect, it stably improves the overall protection effect of the structure. In addition, the chemical properties of the graphite particles are stable and not easily affected by moisture or corrosion, effectively maintaining the expansion performance of the expansion block.

[0062] In one possible implementation, Figure 5 As shown, the storage airbag 9 is further provided with an injection tube 14, which can connect the storage airbag and the outside of the protective shell. By opening the sealing cover of the injection tube located at the external port of the protective shell, the filling material can be added to the storage airbag.

[0063] In a possible implementation, the side outer walls of the protective shell are each provided with a plurality of heat dissipation holes 6. The bottom of the protective shell is fixedly provided with a plurality of supporting legs.

[0064] Having described above several embodiments of the disclosure, any modifications and variations that fall within the scope of the described embodiments are also contemplated. It is also contemplated that the application covered by the claims extends to any alternative combination of claim elements not specifically disclosed. The use of the terms "preferably," "preferably," "preferred," and "has / have" has no relation to the claimed application and merely introduces information that the speaker deems to be helpful. The application as defined by the claims should not be limited to the embodiments described above, but should be given the full scope consistent with the language of the claims.

Claims

1. A transformer safety protection device, characterized in that: The device comprises: a protective shell, a protective anti-collision component, a plurality of touch and pressure components, and a plurality of positioning components; A first mounting groove is provided on the outer wall of the protective shell, and a second mounting groove is provided on the top of the protective shell. The interior of the second mounting groove is used to place the transformer. A top cover is provided on the top notch of the second mounting groove. The protective shell, the first mounting groove, and the second mounting groove together form a hollow inner cavity. A plurality of through holes are provided on the edge of the notch of the first mounting groove. The anti-collision protection assembly includes an anti-collision protection plate and a plurality of protection springs, one end of each protection spring is fixedly connected to the bottom of the first mounting slot, and the other end of each protection spring is fixedly connected to the anti-collision protection plate, and a plurality of threaded holes are provided on the side of the anti-collision protection plate; For each touch-pressure assembly, the touch-pressure assembly includes a sliding shaft, an engaging shaft, and a sleeve spring. One end of the sliding shaft is located in the inner cavity and fixedly connected to the side wall of the second mounting groove. The engaging shaft and the sleeve spring are respectively sleeved on the outside of the sliding shaft. One end of the sleeve spring is fixedly connected to the side wall of the second mounting groove, and the other end of the sleeve spring is fixedly connected to one end of the engaging shaft. The other end of the engaging shaft passes through a through hole and is located outside the protective shell. For each positioning assembly, the positioning assembly includes a sliding rod, a threaded clamping shaft and an engaging sleeve, one end of the sliding rod is located in the inner cavity and is fixedly connected to the inner wall of the protective shell, the threaded clamping shaft sliding sleeve is arranged on the outside of the sliding rod, one end of the threaded clamping shaft passes through the side wall of the first mounting groove and is threadedly connected to a threaded hole on the side of the anti-collision protection plate, the outside of the threaded clamping shaft is located at the position of the inner cavity and the engaging sleeve is sleeved, the inner wall of the engaging sleeve is fixedly connected to the threaded clamping shaft, the engaging sleeve and an engaging shaft are meshed with each other, each threaded clamping shaft limits the anti-collision protection plate in the first mounting groove, and causes multiple protection springs to be squeezed and deformed; If the side where the anti-collision protection plate is located is subjected to an external force impact, each engaging shaft moves toward the side wall of the second mounting groove under the action of the impact force, and each moving engaging shaft drives the engaged engaging sleeve to rotate, thereby driving the threaded clamping shaft threadedly connected to the engaging sleeve to rotate, so that each threaded clamping shaft is rotated out of the connected threaded hole. At this time, the anti-collision protection plate loses its limiting effect, and multiple protection springs push the anti-collision protection plate out. The pushed out anti-collision protection plate can buffer the external force impact; The protection and anti-collision assembly further includes an expansion assembly, wherein the expansion assembly includes a plurality of spring rods and an expansion protection plate; A built-in groove is provided on the side of the anti-collision protection plate, one end of each spring rod is fixedly connected to the bottom of the built-in groove, and the other end of each spring rod is fixedly connected to one side of the expansion protection plate; When the anti-collision protection plate is restrained in the first installation groove, the expansion protection plate is restrained in the built-in groove, and each spring rod is compressed; When the anti-collision protection plate is pushed out of the first installation slot, the expansion protection plate is pushed out of the built-in slot by the spring rods to increase the area of ​​the anti-collision protection plate; The side surfaces of the anti-collision protection plate are respectively provided with a plurality of built-in grooves, and an expansion component is installed in each built-in groove.

2. The device according to claim 1, characterized in that A first installation slot is provided on part or all of the sides of the protective shell, and a protective anti-collision component and a plurality of touch-pressure components and a plurality of positioning components corresponding to the protective anti-collision component are installed in each first installation slot.

3. The device according to claim 1, characterized in that The inner wall of the engaging sleeve of each locking assembly is threadedly connected to the threaded clamping shaft of the locking assembly.

4. The device according to claim 1, characterized in that The touch-pressure components are evenly distributed around the first installation slot, and the positioning components are evenly distributed around the anti-collision protection plate.

5. The device according to any one of claims 1 to 4, characterized in that The device also includes an air storage box, an air guide tube and a self-controlled displacement component; The air storage box is filled with pressurized carbon dioxide gas and is fixedly mounted on the outside of the protective shell. The air duct passes through the inner cavity of the device, one end of the air duct is connected to the air outlet of the air storage box, and the other end of the air duct is connected to the air inlet of the side wall of the second mounting groove. The self-controlled displacement assembly includes a slider and an expansion block. The slider is slidably connected to the side wall of the second mounting groove and blocks the air inlet. The expansion block is fixedly connected to the side wall of the second mounting groove and is close to the slider. The expansion block is filled with graphite particles. When the transformer is heated or burned, the heat generated by the heating or burning of the transformer is transferred to the expansion block. The graphite particles in the expansion block expand due to the heat, thereby expanding the volume of the expansion block. The expanded expansion block can push the slider to move. After the slider moves, the air inlet of the protective shell is unobstructed, allowing the pressurized carbon dioxide gas in the gas storage tank to be introduced into the interior of the protective shell through the air duct, thereby preventing the transformer from burning.

6. The device according to claim 5, characterized in that The device further includes a material storage airbag filled with a mixture of pressurized gas and fire extinguishing particles, and the material storage airbag is fixedly connected to the side wall of the second mounting groove, opposite to the slider; The slide block is provided with a needle tip at a position facing the material storage air bag; When the transformer is heated or burned, the heat generated by the heating or burning of the transformer is transferred to the expansion block. The graphite particles in the expansion block expand due to the heat, thereby expanding the volume of the expansion block. The expanded expansion block can push the slider to move. After the slider moves, the air inlet of the protective shell is unobstructed, so that the pressurized carbon dioxide gas in the gas storage tank is introduced into the second installation groove through the air guide pipe, and the needle tip of the slider pierces the storage air bag, causing the mixture in the storage air bag to explode and spread in the second installation groove, thereby preventing the transformer from burning.

7. The device according to claim 1, characterized in that A plurality of heat dissipation holes are arranged on the side outer walls of the protective shell.

8. The device according to claim 1, characterized in that A plurality of supporting bottom legs are fixedly installed on the bottom of the protective shell.

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