Power system transformer short circuit protection device

Abstract

The present invention provides a short-circuit prevention device for a power system transformer, which belongs to the technical field of transformers and includes a supporting structure, a protective structure and a sensing structure; the supporting structure includes a protective shell body and a protective cover; an ultrasonic bird repeller is provided at the lower end of the protective cover; the protective structure includes multiple rows of barbed wire and a shovel plate assembly, and a shielding net arranged at the upper end of the protective cover; the shovel plate assembly includes a front shovel plate, a support plate and a rear baffle; the sensing structure includes a pressure sensing device and a laser sensing unit, and a control unit, and the control unit drives the shovel plate assembly to slide. The short-circuit prevention device for a power system transformer provided by the present invention is provided with a protective shell body and a protective cover to shield the transformer, and through the ultrasonic bird repeller, the barbed wire and the shovel plate assembly, it is ensured that there are no objects on the protective cover, thereby improving the short-circuit prevention effect and avoiding affecting the operation of the transformer; the control unit then drives the shovel plate assembly to move, thereby solving the problem of manual cleaning.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers, and more specifically, relates to a short-circuit protection device for a transformer in a power system. Background Art

[0002] With the rapid development of science and technology, the power supply system is particularly important. The maintenance of the transformer is related to whether the power system can work smoothly. Some birds, small animals and even vines entangled and dropped conductive objects can cause the transformer to short-circuit, causing transformer damage and power outages to a certain extent.

[0003] The traditional transformer short-circuit protection must rely on manual driving or clearing at close range to ensure the normal operation of the equipment. Since the transformer is high voltage, it is very dangerous to operate it. In addition, manual operation is time-consuming and labor-intensive, and has high requirements for operators, and cannot achieve remote control and automatic control.

[0004] The existing transformer short-circuit protection device mainly drives away birds through sound waves, but cannot stop vines, and the short-circuit protection effect is poor. Summary of the invention

[0005] The object of the present invention is to provide a short-circuit protection device for transformers in a power system, aiming to solve the problem that the existing short-circuit protection device for transformers is not effective and needs to be manually driven away or cleaned after the transformer is short-circuited.

[0006] To achieve the above object, the technical solution adopted by the present invention is: to provide a short-circuit protection device for a power system transformer, comprising:

[0007] The supporting structure comprises a protective shell body for containing the transformer and a protective cover movably arranged on the upper part of the protective shell body by means of an elastic member, wherein the protective cover has a degree of freedom in the longitudinal direction and a ventilation gap is provided between the protective cover and the protective shell body; an ultrasonic bird repellent is provided at the lower end of the protective cover;

[0008] The protective structure comprises a plurality of rows of barbed wires arranged on the upper end of the protective cover, a shovel plate assembly slidably arranged on the protective cover along the length direction of the barbed wires, and a shielding net connecting the protective shell body and the protective cover to shield the ventilation gap; the shovel plate assembly comprises a front shovel plate and a supporting plate connected in sequence and a rear baffle slidably connected to the supporting plate, and the front end of the front shovel plate is attached to the upper end surface of the protective cover;

[0009] The sensing structure includes a pressure sensing device arranged at the lower end of the elastic member, a laser sensing unit arranged at the upper end of the protective cover, and a control unit, and the control unit drives the shovel plate assembly to slide.

[0010] As another embodiment of the present application, a support rod is provided at the lower end of the protective cover, a load-bearing seat is provided at the upper part of the protective shell body, the support rod is longitudinally slidable in the load-bearing seat, and the elastic member is located between the support rod and the load-bearing seat.

[0011] As another embodiment of the present application, a receiving groove is further provided at the lower end of the protective cover, and the receiving groove is located on the outside of the support rod. A torsion spring shaft is provided in the receiving groove, and the shielding net is wound on the torsion spring shaft. The free end of the shielding net extends to the outer wall of the protective shell body.

[0012] As another embodiment of the present application, a guide member is provided at the lower end of the protective cover, and the cross-section of the guide member is L-shaped. The guide member is located on the outside of the four corners of the protective shell body, and a guide groove is provided on the guide member. Both sides of the shielding net are slidably arranged in the guide groove.

[0013] As another embodiment of the present application, a plurality of grooves are provided at intervals on the upper portion of the protective cover, a lifting plate is provided in the groove, and the barbed wire is provided on the lifting plate; a lifting piece is provided at the lower end of the lifting plate.

[0014] As another embodiment of the present application, the lifting member includes:

[0015] A driving motor is arranged outside the protective cover, and a driving rod is arranged at the output end of the driving motor, and a driving gear is sleeved on the driving rod;

[0016] A tooth plate is arranged at the lower end of the lifting plate and meshes with the driving gear.

[0017] As another embodiment of the present application, a crossing groove arranged opposite to the plurality of grooves is provided on the front shovel plate, and the depth of the crossing groove is greater than the height of the barbed wire.

[0018] As another embodiment of the present application, the shovel plate assembly further includes:

[0019] A linear drive module is arranged in the protective cover along the length direction of the barbed wire.

[0020] As another embodiment of the present application, the protective cover includes an inner cover and a herringbone outer cover, an equipment cavity is formed between the inner cover and the outer cover, and a battery is provided in the equipment cavity; the barbed wire and the shovel plate assembly are both provided on the outer cover; the battery is electrically connected to the barbed wire and the control unit.

[0021] As another embodiment of the present application, a photovoltaic panel is provided on the outer cover, and the photovoltaic panel is electrically connected to the battery.

[0022] The beneficial effects of the power system transformer short-circuit prevention device provided by the present invention are: compared with the prior art, the power system transformer short-circuit prevention device of the present invention is provided with a protective shell body and a protective cover to shield the transformer, and a ventilation gap is provided between the protective cover and the protective shell body; and an ultrasonic bird repeller, a barbed wire and a shovel assembly are used to ensure that there are no objects on the protective cover, thereby improving the short-circuit prevention effect and avoiding affecting the operation of the transformer; a pressure sensing device located at the lower end of the protective cover and a laser sensing unit located at the upper end of the protective cover drive the shovel assembly to solve the problem of manual cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic structural diagram of a short-circuit protection device for a power system transformer provided by a first embodiment of the present invention;

[0025] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0026] Figure 3 for Figure 1 The cross-sectional structure diagram of the middle BB line;

[0027] Figure 4 A side view of a short-circuit protection device for a power system transformer provided by a first embodiment of the present invention;

[0028] Figure 5 A top view of a short-circuit protection device for a power system transformer provided by a first embodiment of the present invention;

[0029] Figure 6 A schematic structural diagram of a short-circuit protection device for a power system transformer provided in accordance with a second embodiment of the present invention;

[0030] Figure 7 A schematic structural diagram of a short-circuit protection device for a power system transformer provided in a third embodiment of the present invention.

[0031] In the figure: 100, protective shell body; 101, load-bearing seat; 102, elastic member; 110, protective cover; 111, support rod; 112, barbed wire; 113, lifting plate; 114, support plate; 115, front shovel plate; 116, rear baffle; 117, torsion spring shaft; 118, shielding net; 119, guide member; 120, transformer; 130, isolation net; 131, mounting plate; 140, pressure sensing device; 141, laser sensor unit; 142, ultrasonic bird repeller; 150, linear drive module; 151, cross bar; 152, slide groove; 153, slider; 154, tooth plate; 155, driving gear; 160, ventilation window; 161, outer cover; 162, inner cover. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] See also Figures 1 to 7 , the power system transformer short-circuit prevention device provided by the present invention is now described. The power system transformer short-circuit prevention device includes a support structure, a protective structure and an induction structure; the support structure includes a protective shell body 100 for containing a transformer 120 and a protective cover 110 movably arranged on the upper part of the protective shell body 100 by means of an elastic member 102, the protective cover 110 has a degree of freedom in the longitudinal direction, and there is a ventilation gap between the protective cover 110 and the protective shell body 100; an ultrasonic bird repeller 142 is arranged at the lower end of the protective cover 110; the protective structure includes multiple rows of barbed wire 112 arranged at the upper end of the protective cover 110 and a plurality of rows of barbed wire 112 arranged along the length direction of the barbed wire 112. A shovel plate assembly is slidably arranged on the protective cover 110, and a shielding net 118 is connected to the protective shell body 100 and the protective cover 110 to shield the ventilation gap; the shovel plate assembly includes a front shovel plate 115 and a support plate 114 connected in sequence and a rear baffle 116 slidably connected to the support plate 114, and the front end of the front shovel plate 115 is attached to the upper end surface of the protective cover 110; the sensing structure includes a pressure sensing device 140 arranged at the lower end of the elastic member 102 and a laser sensing unit 141 arranged at the upper end of the protective cover 110, and a control unit, and the control unit drives the shovel plate assembly to slide.

[0034] Compared with the prior art, the short-circuit protection device for transformers in power systems provided by the present invention has the following features: a transformer 120 is arranged in a protective shell body 100; a protective cover 110 and a main elastic member 102 are arranged on the protective shell body 100 and a ventilation gap is left between the protective cover body 100 and the protective shell body 100, so as to facilitate ventilation and cooling of the transformer 120; an ultrasonic bird repeller 142 is arranged at the lower end of the protective cover 110 for driving away birds near the transformer 120; a plurality of rows of barbed wires 112 are arranged at the upper end of the protective cover 110 for preventing small live animals from climbing; a shovel assembly is also arranged at the upper end of the protective cover 110 for cleaning plants or conductive objects that fall on the protective cover 110 to prevent the transformer 120 in the protective shell body 100 from being affected; a shielding net 118 shields the ventilation gap to prevent animals or plants from entering the inner side of the protective shell body 100 from the ventilation gap.

[0035] An elastic member 102 is provided between the protective cover 110 and the protective shell body 100. When an animal climbs onto the protective cover 110 or a conductive object falls onto the protective cover 110, the gravity of the protective cover 110 increases, so that the force on the elastic member 102 increases, and the pressure value measured by the pressure sensing device 140 located at the lower end of the elastic member 102 increases, and the pressure signal is transmitted to the control unit, which drives the shovel assembly to slide along the length direction of the barbed wire 112 to push the animal or conductive object on the protective cover 110 off to prevent it from entering the protective shell body 100 along the protective cover 110.

[0036] A laser sensor unit 141 is also provided at the upper end of the protective cover 110. When animals or plants appear on the protective cover 110, the laser sensor unit 141 transmits the result to the control unit, and the control unit drives the shovel assembly to slide along the length direction of the barbed wire 112 to push the animals or plants on the protective cover 110 off to prevent them from entering the protective shell body 100 along the protective cover 110.

[0037] The shovel plate assembly includes a front shovel plate 115, a support plate 114 and a rear baffle plate 116 which are connected in sequence. The front end of the front shovel plate 115 is attached to the upper end surface of the protective cover 110. When the shovel plate assembly slides forward, the object at the upper end of the barbed wire 112 is shoveled by the front shovel plate 115 to the support plate 114 until it slides to the end of the protective cover 110, and the rear baffle plate 116 slides forward until the object on the support plate 114 is pushed out.

[0038] The power system transformer short-circuit prevention device provided by the present invention is provided with a protective shell body 100 and a protective cover 110 to shield the transformer 120, and a ventilation gap is provided between the protective cover 110 and the protective shell body 100; and an ultrasonic bird repeller 142, a barbed wire 112 and a shovel plate assembly are used to ensure that there are no objects on the protective cover 110, thereby improving the short-circuit prevention effect and avoiding affecting the operation of the transformer 120;

[0039] Optionally, the shovel plate assembly further includes a driving member for driving the rear baffle plate 116 to move forward and backward, and the driving member may be a cylinder electric push rod.

[0040] Optionally, a fixing plate extending upward is provided at the rear end of the support plate 114 , and the driving member is provided between the fixing plate and the rear baffle 116 .

[0041] Optionally, the control unit may be GCAN-PLC-400 / 510. The laser sensor unit 141 may be a digital laser sensor LS-400. The ultrasonic bird repeller 142 may be a Soumiety brand single-head adjustable bird repeller.

[0042] Optionally, a mounting plate 131 is provided at the lower portion of the protective shell body 100 , and the mounting plate 131 divides the inner cavity of the protective shell body 100 into an upper mounting cavity and a lower ventilation cavity, and an isolation net 130 is provided on the side wall of the lower ventilation cavity.

[0043] Optionally, the line of the transformer 120 passes through a threading hole on the rear side plate of the protective shell body 100, and an insulating gasket is provided in the threading hole.

[0044] In some possible embodiments, see Figure 1 and Figure 2 A support rod 111 is provided at the lower end of the protective cover 110 , a load-bearing seat 101 is provided at the upper part of the protective shell body 100 , the support rod 111 is longitudinally slidably arranged in the load-bearing seat 101 , and the elastic member 102 is located between the support rod 111 and the load-bearing seat 101 .

[0045] The load-bearing seat 101 is arranged on the inner side of the protective shell body 100, and the load-bearing seat 101 is located at the four corners of the protective shell body 100, and a connecting groove opening upward is provided on the load-bearing seat 101; a support rod 111 is provided at the lower side of the protective cover 110, and the lower end of the support rod 111 extends into the connecting groove of the load-bearing seat 101, and an elastic member 102 and a pressure sensing device 140 are arranged between the lower end surface of the support rod 111 and the bottom end of the connecting groove.

[0046] The open end of the connecting groove is provided with a stopper bent toward the inside of the connecting groove; the lower end of the support rod 111 is provided with a baffle matched with the stopper to prevent the end of the support rod 111 from falling out of the connecting groove.

[0047] Optionally, the cross section of the connecting groove is circular. The cross section of the supporting rod 111 is circular.

[0048] When the gravity of the protective cover 110 increases, the force on the elastic member 102 at the lower end of the support rod 111 increases, and the pressure value measured by the pressure sensing device 140 at the lower end of the elastic member 102 increases, which transmits the pressure signal to the control unit, and the control unit controls the sliding of the shovel assembly on the protective plate.

[0049] Optionally, the elastic member 102 is a spring. The pressure sensing device 140 may be an annular gasket pressure sensor EVT-14T6.

[0050] In some possible embodiments, see Figure 1 and Figure 2 A receiving groove is also provided at the lower end of the protective cover 110, and the receiving groove is located on the outside of the support rod 111. A torsion spring shaft 117 is provided in the receiving groove, and a shielding net 118 is wound on the torsion spring shaft 117. The free end of the shielding net 118 extends to the outer wall of the protective shell body 100.

[0051] The lower end of the protective cover 110 is provided with a receiving groove with an opening facing downward, in which a torsion spring shaft 117 is installed, on which a shielding net 118 is wound, and the free end of the shielding net 118 extends from the receiving groove and is fixed to the outer wall of the protective shell body 100. The length of the receiving groove is greater than or equal to the length of the corresponding side wall of the protective shell body 100; the depth of the receiving groove is greater than the outer diameter of the torsion spring shaft 117 with the shielding net 118 wound, and a limiting plate is provided at the lower end of the receiving groove, and a pore is provided on the limiting plate to allow the shielding net 118 to pass through, and the limiting plate blocks the torsion spring shaft 117 with the shielding net 118 wound inside the receiving groove.

[0052] Optionally, the torsion spring shaft 117 applies a reverse pulling force to the shielding net 118 to tighten the end of the shielding net 118 and keep the shielding net 118 in a taut state.

[0053] Optionally, the free end of the shielding net 118 is fixed to the outside of the protective shell body 100 by means of screws.

[0054] Optionally, a mounting portion is provided at the upper end of the outer wall of the protective shell body 100, and the mounting portion protrudes from the wall surface of the outer wall. The free end of the shielding net 118 is attached to the outer side of the mounting portion. Optionally, an abutment plate is provided at the outer side of the free end of the shielding net 118, and the abutment plate presses the shielding net 118 against the mounting portion with the help of screws.

[0055] Optionally, at least two bolts are arranged at longitudinal intervals.

[0056] In some possible embodiments, see Figure 1 and Figure 2 A guide member 119 is provided at the lower end of the protective cover 110. The cross section of the guide member 119 is L-shaped. The guide member 119 is located on the outside of the four corners of the protective shell body 100. A guide groove is opened on the guide member 119, and both sides of the shielding net 118 are slidably arranged in the guide groove.

[0057] The guide member 119 is L-shaped. The cross section of the protective shell body 100 is rectangular. The guide member 119 is disposed outside the four corners of the protective shell body 100 , and the two inner side walls of the guide member 119 correspond to the corners of the protective shell body 100 .

[0058] The end surface of the guide member 119 is provided with a guide groove, and the length direction of the guide groove is consistent with the length direction of the guide member 119. Both side edges of the shielding net 118 are arranged inside the guide groove, so as to limit the shielding net 118.

[0059] Optionally, two inner side walls of the guide member 119 are attached to the outer side walls of the corners of the protective shell body 100 .

[0060] Optionally, an angle iron is provided on the inner side of the guide member 119. The inner side wall of the angle iron is attached to the outer side of the protective shell body 100.

[0061] In some possible embodiments, see Figure 1 , Figure 2 and Figure 4 A plurality of grooves are provided at intervals on the upper portion of the protective cover 110 , a lifting plate 113 is provided in the groove, and the barbed wire 112 is provided on the lifting plate 113 ; a lifting piece is provided at the lower end of the lifting plate 113 .

[0062] The upper part of the protective cover 110 is provided with a plurality of parallel and spaced grooves, the cross section of the groove is rectangular, and a lifting plate 113 is provided inside the groove, the edge of which fits the side wall of the groove and is located inside the groove or above the groove by the lifting of the lifting member.

[0063] When the lifting member is extended, the upper end surface of the lifting plate 113 is flush with the upper end surface of the protective cover 110, and the barbed wire 112 above the lifting plate 113 protrudes from the upper end surface of the protective cover 110; when the lifting member is shortened, the lower end surface of the lifting plate 113 sinks into the groove, and the barbed wire 112 above the lifting plate 113 is located inside the groove, which is convenient for workers to install and operate.

[0064] Optionally, the lifting member is a pneumatic cylinder, a hydraulic cylinder or an electric push rod.

[0065] In some possible embodiments, see Figure 6 The lifting member includes a driving motor and a gear plate 154; the driving motor is arranged on the outside of the protective cover 110, and a driving rod is provided at the output end of the driving motor, and a driving gear 155 is sleeved on the driving rod; the gear plate 154 is arranged at the lower end of the lifting plate 113 and meshes with the driving gear 155.

[0066] The lifting member includes a driving motor arranged outside the protective cover 110, a driving rod is arranged on one side of the driving motor, the driving rod passes through the protective cover 110, and a plurality of driving gears 155 are arranged at intervals on the driving rod. The output end of the driving motor drives the driving rod to rotate, and drives the driving gear 155 on the driving rod to rotate. The driving gear 155 is engaged with the tooth plate 154, and drives the tooth plate 154 to move up and down.

[0067] Optionally, the lifting member includes a support plate and a tooth plate 154, the end of the support plate is connected to the lower end of the lifting plate 113, and the tooth plate 154 is arranged on one side of the support plate.

[0068] Optionally, the lifting plate 113 is connected with a plurality of lifting members along the length direction.

[0069] Optionally, a plurality of driving rods are arranged in parallel.

[0070] In some possible embodiments, see Figure 6 The front shovel plate 115 is provided with a spanning groove arranged opposite to the plurality of grooves, and the depth of the spanning groove is greater than the height of the barbed wire 112 .

[0071] The lower part of the front shovel plate 115 is provided with a plurality of spanning grooves arranged opposite to the grooves, and the spanning grooves are used to accommodate the barbed wire 112. The front ends of the front shovel plates 115 on both sides of the spanning grooves abut against the upper end of the protective cover 110, and the cross section of the front shovel plate 115 is triangular, and the thickness of the front shovel plate 115 gradually increases from the front to the back, and the upper end surface of the rear end of the front shovel plate 115 is flush with the upper end surface of the support plate 114.

[0072] The height of the lower end surface of the supporting plate 114 is greater than the height of the barbed wire 112, and the height of the lower end surface of the supporting plate 114 is greater than or equal to the height of the spanning groove.

[0073] When there is an object on the gill net 112, the front shovel board 115 slides forward, and the front shovel board 115 shovels the object onto the supporting plate 114 and pushes it to one side of the protective cover 110. The gill net 112 is not only used to prevent animals from landing on the protective cover 110, but also can lift up the objects that fall on the protective cover 110 for easy removal.

[0074] Optionally, the barbed wire 112 is made of plastic barbs.

[0075] Optionally, the barbed wire 112 is made of metal barbs, which are connected to a weak current power source via electric wires so that the metal barbs are electrified and used to drive away animals.

[0076] In some possible embodiments, see Figure 3 The shovel board assembly also includes a linear drive module 150, which is arranged in the protective cover 110 along the length direction of the barbed wire 112.

[0077] A through cavity is provided in the protective cover 110, and the through cavity penetrates the protective cover 110 in a direction perpendicular to the length of the barbed wire 112. The length of the through cavity of the protective cover 110 in the direction along the length of the barbed wire 112 is less than or equal to the length of the barbed wire 112. The linear drive module 150 is installed in the through cavity, and the length direction of the linear drive module 150 is consistent with the length direction of the barbed wire 112. The linear drive module 150 connects the support plate 114 and the front shovel plate 115, and the linear drive module 150 drives the front shovel plate 115 and the support plate 114 to move forward.

[0078] Optionally, a cross bar 151 is connected to the linear drive module 150, and the cross bar 151 passes through the through cavity in a direction perpendicular to the length of the barbed wire 112 and extends to the outside of the through cavity, and the cross bar 151 is connected to the support plate 114 and the front shovel plate 115 by means of a support rod.

[0079] Optionally, a slide groove 152 is provided on the side wall of the protective cover 110, the slide groove 152 is connected to the through cavity, a slider 153 is provided in the slide groove 152, and the slider 153 is connected to the cross bar 151 and the support rod. When the linear drive module 150 drives the cross bar 151 to slide, the slide groove 152 has a guiding function.

[0080] In some possible embodiments, see Figure 7 The protective cover 110 includes an inner cover 162 and a herringbone outer cover 161, an equipment cavity is formed between the inner cover 162 and the outer cover 161, and a battery is arranged in the equipment cavity; the barbed wire 112 and the shovel plate assembly are both arranged on the outer cover 161; the battery is electrically connected to the barbed wire 112 and the control unit.

[0081] The protective cover 110 is double-layered, including an outer herringbone outer cover 161 and an inner cover 162. An equipment cavity is formed between the double-layer covers. A battery is installed in the equipment cavity for weak current use of the barbed wire 112 and the application of the control unit. The barbed wire 112 and the shovel assembly are both arranged on the outer cover 161. A ventilation window 160 is provided in the equipment cavity.

[0082] Optionally, a photovoltaic panel is provided on the outer cover 161, and the photovoltaic panel is electrically connected to the storage battery. A photovoltaic panel is provided on a south-facing side of the outer cover 161, and the photovoltaic panel supplies power to the storage battery.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A short-circuit protection device for a power system transformer, characterized in that: include: The supporting structure comprises a protective shell body for containing the transformer and a protective cover movably arranged on the protective shell body by means of an elastic member, wherein the protective cover has a degree of freedom in the longitudinal direction and a ventilation gap is provided between the protective cover and the protective shell body; an ultrasonic bird repellent is provided at the lower end of the protective cover; The protective structure comprises a plurality of rows of barbed wires arranged on the upper end of the protective cover, a shovel plate assembly slidably arranged on the protective cover along the length direction of the barbed wires, and a shielding net connecting the protective shell body and the protective cover to shield the ventilation gap; the shovel plate assembly comprises a front shovel plate and a supporting plate connected in sequence and a rear baffle slidably connected to the supporting plate, and the front end of the front shovel plate is attached to the upper end surface of the protective cover; A sensing structure, comprising a pressure sensing device disposed at the lower end of the elastic member, a laser sensing unit disposed at the upper end of the protective cover, and a control unit, wherein the control unit drives the shovel plate assembly to slide; A support rod is provided at the lower end of the protective cover, a load-bearing seat is provided at the upper part of the protective shell body, the support rod is longitudinally slidably arranged in the load-bearing seat, and the elastic member is located between the support rod and the load-bearing seat; A plurality of grooves are arranged at intervals on the upper part of the protective cover, a lifting plate is arranged in the groove, and the barbed wire is arranged on the lifting plate; a lifting piece is arranged at the lower end of the lifting plate.

2. The short-circuit protection device for transformer in power system according to claim 1, characterized in that: The lower end of the protective cover is also provided with a receiving groove, the receiving groove is located on the outside of the support rod, a torsion spring shaft is provided in the receiving groove, the shielding net is wound on the torsion spring shaft, and the free end of the shielding net extends to the outer side wall of the protective shell body.

3. The short-circuit protection device for transformer in power system according to claim 2, characterized in that: A guide piece is provided at the lower end of the protective cover, and the cross section of the guide piece is L-shaped. The guide piece is located outside the four corners of the protective shell body, and a guide groove is opened on the guide piece. Both sides of the shielding net are slidably arranged in the guide groove.

4. The short-circuit protection device for transformer in power system according to claim 1, characterized in that: The lifting member comprises: A driving motor is arranged outside the protective cover, and a driving rod is arranged at the output end of the driving motor, and a driving gear is sleeved on the driving rod; A tooth plate is arranged at the lower end of the lifting plate and meshes with the driving gear.

5. The short-circuit protection device for transformer in power system according to claim 1, characterized in that: The front shovel plate is provided with a spanning groove arranged opposite to the plurality of grooves, and the depth of the spanning groove is greater than the height of the barbed wire.

6. The short-circuit protection device for transformer in power system according to claim 1, characterized in that: The shovel plate assembly also includes: A linear drive module is arranged in the protective cover along the length direction of the barbed wire.

7. The short-circuit protection device for transformer in power system according to claim 1, characterized in that: The protective cover comprises an inner cover and a herringbone outer cover, an equipment cavity is formed between the inner cover and the outer cover, and a battery is arranged in the equipment cavity; the barbed wire and the shovel plate assembly are both arranged on the outer cover; the battery is electrically connected to the barbed wire and the control unit.

8. The short-circuit protection device for transformer in power system according to claim 7, characterized in that: The outer cover is provided with a photovoltaic panel, and the photovoltaic panel is electrically connected to the storage battery.

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