High-low voltage prefabricated substation with good protection performance

Abstract

The invention relates to the technical field of prefabricated substations, in particular to a high-low voltage prefabricated substation with good protection performance, which mainly comprises a substation main body, a first maintenance side door, a second maintenance side door, a heat dissipation assembly and a protection auxiliary mechanism, wherein a heat dissipation window is arranged in the first maintenance side door, and the heat dissipation window is connected with the heat dissipation assembly; a protection structure is further arranged in the heat dissipation cavity groove body, a ventilation groove hole is formed in a carrier plate in the protection structure, and a hollow taper pipe is arranged at the hole opening position of the ventilation groove hole, so that the dustproof protection effect is further improved on the basis of guaranteeing air circulation, and in order to better improve the air circulation heat dissipation effect, the heat dissipation effect is improved. According to the scheme, the ventilation window is arranged in the second maintenance side door, the protection auxiliary mechanism is arranged on the ventilation window, and in order to prevent excessive impurities accelerating circulation of gas from entering the interior of the transformer substation, an impurity prevention effect is provided through the auxiliary assembly.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated transformer substations, in particular to a high and low voltage prefabricated transformer substation with good protection performance. Background Art

[0002] Prefabricated substation, also known as box-type substation or prefabricated substation. Prefabricated substation is a factory-prefabricated indoor and outdoor compact distribution equipment that integrates high-voltage switchgear, distribution transformers and low-voltage distribution devices and is arranged in a certain wiring scheme.

[0003] After searching, the existing document with publication number CN111355179A discloses a high and low voltage prefabricated substation with good protection performance, and its scheme includes a box body, an electric power equipment cabinet, a base assembly and three protection assemblies. The base assembly includes a substrate, a bottom plate and a plurality of first elastic members; the substrate is connected to the bottom plate, and each first elastic member is connected to the side wall of the substrate; the electric power equipment cabinet is arranged on the substrate; the box cover is arranged on the bottom plate, and the box wall of the box body abuts against the bottom plate; one end of each first elastic member is connected to the inner box wall of the box body, and the other end of each first elastic member is connected to the side wall of the substrate. The box body has four side walls, one side wall of the box body is provided with an inspection door, and each side wall of the other three side walls of the box body is connected to a protection assembly; the protection assembly includes a protection plate and a plurality of second elastic members, one end of each second elastic member is connected to the protection plate, and one end of each second elastic member is connected to a side wall of the box body.

[0004] Existing outdoor substations also need to have corresponding heat dissipation protection; generally, heat dissipation grooves are set on the side walls of the outer box to meet its heat dissipation needs. During the heat dissipation process, on the one hand, external dust and impurities will enter through the heat dissipation grooves, which will cause the problem of external impurities entering the substation box during the air permeable heat dissipation work, and in rainy weather, splashing rainwater is also easy to enter the box through the heat dissipation grooves, affecting the operation of its internal devices; on the other hand, only the heat dissipation grooves are set on the side walls of the box, and its heat dissipation protection effect is poor; therefore, the existing substations need to further optimize the heat dissipation protection work to improve their protection performance.

[0005] To this end, the present invention proposes a high and low voltage prefabricated substation with good protection performance to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a high and low voltage prefabricated substation with good protection performance to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: a high and low voltage prefabricated substation with good protection performance, comprising a substation body, a first maintenance side door, a second maintenance side door, a heat dissipation component and a protection auxiliary mechanism;

[0008] A supporting base is arranged at the bottom end of the substation body, and a top cover is arranged at the top of the substation body;

[0009] The substation body is provided with a first maintenance side door on the front and rear sides, and a second maintenance side door on the left and right sides;

[0010] A heat dissipation window is provided in the first inspection side door, and a convex frame is fixedly provided at the inner opening of the heat dissipation window; the heat dissipation window is connected to the heat dissipation component;

[0011] A ventilation window is provided in the second inspection side door, and a protective auxiliary mechanism is provided on the ventilation window.

[0012] Preferably, the heat dissipation assembly includes a carrier, a mounting frame, a positioning slot, a heat dissipation cavity slot and a protective structure; the mounting frame is fixedly provided on one side of the carrier, and the side wall of the mounting frame is provided with a positioning slot, and the heat dissipation cavity slot is equidistantly provided in the carrier.

[0013] Preferably, the installation frame and the convex frame are fixedly connected by screws; and a protective structure is provided in the heat dissipation cavity.

[0014] Preferably, the heat dissipation cavity groove body is arranged to be inclined, and the outer groove opening of the heat dissipation cavity groove body is lower than the inner groove opening.

[0015] Preferably, the protective structure includes a fixed frame, a carrier plate, an elastic card frame, ventilation slots, a hollow conical tube and auxiliary side holes; the fixed frame is fixedly arranged in the heat dissipation cavity groove, an elastic card frame is fixedly arranged on one side of the carrier plate, the elastic card frame is adapted to be snap-connected with the fixed frame, and ventilation slots are equidistantly arranged in the carrier plate.

[0016] Preferably, a hollow conical tube is fixedly provided at the outer opening of the ventilation slot, the conical end of the hollow conical tube is configured to be sealed, and auxiliary side holes are equidistantly provided on the sides of the hollow conical tube.

[0017] Preferably, the protective auxiliary mechanism includes a protective cover body, a fixed side panel, a heat dissipation protection hole, a dust collection groove, a loading ring, a support frame, a rotation control motor, a connecting head end, auxiliary fan blades and auxiliary components; a fixed side panel is fixedly provided on the outer side wall of the cover opening at one end of the protective cover body, and the fixed side panel is fixedly connected to the second inspection side door by screws, and a heat dissipation protection hole is provided at the other end of the protective cover body, and the dust collection groove is provided in the protective cover body and is close to the heat dissipation protection hole; mounting holes are symmetrically provided on the sides of the loading ring, and the loading ring is fixedly provided on the inner side wall of the protective cover body by screws, a support frame is fixedly provided in the loading ring, a rotation control motor is fixedly provided at the center position of the support frame, a connecting shaft is provided at one end of the rotation control motor, and a connecting head end is provided at one end of the connecting shaft, and auxiliary fan blades are fixedly provided at equal distances on the sides of the connecting head end.

[0018] Preferably, a loading bar is fixedly provided at the end of the connecting head by screws, and a cleaning brush is provided on the loading bar.

[0019] Preferably, the auxiliary component includes a first docking ring, a second docking ring, a connecting thread groove, an installation slot, a docking screw, a fixed disk body, a first protective through hole and a second protective through hole; a connecting thread groove is provided on one side of the first docking ring, and an installation slot is provided through the second docking ring, the first docking ring and the second docking ring are connected and fixed by the provided docking screws, the docking screws pass through the installation slot in the second docking ring, and then are threadedly connected to the connecting thread groove on the first docking ring, the first docking ring and the second docking ring are both fixedly provided with a fixed disk body on the inner side, the first protective through holes are equidistantly provided in the fixed disk body on the inner side of the first docking ring, and the second protective through holes are equidistantly provided in the fixed disk body on the inner side of the second docking ring.

[0020] Preferably, the second protective through hole and the first protective through hole are staggered; a first limiting slot is equidistantly arranged on one side of the fixed disk in the first docking ring, and a second limiting slot is equidistantly arranged on one side of the fixed disk in the second docking ring, the second limiting slot and the first limiting slot are arranged in corresponding positions and the same number of groups, and the shapes of the slots of the two are circular and the diameters of the slots are set equal; the first limiting slot is adapted to be snap-fitted with one end of the columnar auxiliary cotton body, and the other end of the columnar auxiliary cotton body is adapted to be snap-fitted with the second limiting slot.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The high and low voltage prefabricated substation designed by the present invention mainly includes a substation body, a first maintenance side door, a second maintenance side door, a heat dissipation component and a protective auxiliary mechanism; wherein a heat dissipation window is arranged in the first maintenance side door, and the heat dissipation window is connected to the heat dissipation component; and the heat dissipation cavity slot body in the protective structure is inclined, and the outer slot of the heat dissipation cavity slot body is lower than the inner slot; try to avoid blocking external impurities and water stains during heat dissipation; and in this scheme, an installation frame is arranged on one side of the carrier body and fixedly connected with the convex frame, so that the heat dissipation component is detachable, which is convenient for subsequent maintenance and replacement work; in order to better realize the heat dissipation effect of the heat dissipation window, the present invention also arranges a protective structure in the heat dissipation cavity slot body, wherein ventilation slots are arranged on the carrier plate in the protective structure A hollow conical tube is arranged at the opening of the ventilation slot, wherein auxiliary side holes are evenly arranged on the sides of the hollow conical tube, the purpose of which is to further improve the dustproof protection on the basis of ensuring gas circulation, wherein the cone end of the hollow conical tube is blocked and not opened, the purpose of which is to prevent splashing water stains or external impurities from directly entering from the opening position of the starting end; in order to better improve the air circulation and heat dissipation effect, the present scheme is provided with a ventilation window in the second maintenance side door, and a protective auxiliary mechanism is arranged on the ventilation window. The present scheme improves the gas circulation through the rotation of the auxiliary fan blades to perform auxiliary heat dissipation work, wherein in order to avoid accelerating the excessive entry of impurities in the circulating gas into the substation, that is, an anti-impurity effect is also provided here, which is achieved by the auxiliary components provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the front side of the high and low voltage prefabricated substation structure connection of the present invention;

[0024] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structural connection at center A;

[0025] Figure 3 It is a schematic diagram of the rear side of the high and low voltage prefabricated substation structure connection of the present invention;

[0026] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structural connection at B in the middle;

[0027] Figure 5 It is a schematic diagram of the front side of the connection between the heat dissipation component and the heat dissipation window structure of the present invention;

[0028] Figure 6 It is a schematic diagram of the back side of the connection between the heat dissipation component and the heat dissipation window structure of the present invention;

[0029] Figure 7 It is a schematic diagram of the local structural connection of the heat dissipation component of the present invention;

[0030] Figure 8 It is a schematic diagram of the connection of the protective structure of the present invention;

[0031] Fig. 9 For the present invention Figure 8 A magnified schematic diagram of the structural connection at C in the middle;

[0032] Fig.10 This is a schematic diagram of the explosion of the front side of the protective auxiliary mechanism structure connection of the present invention;

[0033] Fig.11 For the present invention Fig.10 The enlarged schematic diagram of the structural connection at D in the middle;

[0034] Fig.12 It is a schematic diagram of the back explosion of the protective auxiliary mechanism structure connection of the present invention;

[0035] Fig.13 For the present invention Fig.12 The enlarged schematic diagram of the structural connection at E in the middle;

[0036] Fig.14 It is a schematic diagram of the left side of the explosion of the auxiliary component structure connection of the present invention;

[0037] Fig.15 For the present invention Fig.14 The enlarged schematic diagram of the structural connection at F in the middle;

[0038] Fig.16 It is a schematic diagram of the exploded right side of the auxiliary component structure connection of the present invention;

[0039] Fig.17 For the present invention Fig.16 Enlarged schematic diagram of the structural connection at G in the middle.

[0040] In the figure: substation body 1, support base 11, top cover 12, first maintenance side door 2, heat dissipation window 21, convex frame 22, second maintenance side door 3, ventilation window 31, carrier 401, installation frame 402, positioning card slot 403, heat dissipation cavity slot 404, fixed frame 501, carrier plate 502, elastic card frame 503, ventilation slot 504, hollow cone 505, auxiliary side hole 506, protective cover 601, fixed side plate 602, heat dissipation protection hole 603, dust fall Slot 604, loading ring 605, support frame 606, rotation control motor 607, connecting head end 608, auxiliary fan blades 609, loading bar 701, cleaning brush 702, first docking ring 801, second docking ring 802, connecting thread groove 803, installation through-hole 804, docking screw 805, fixing disk body 806, first protective through hole 807, second protective through hole 808, first limit slot 901, second limit slot 902, cylindrical auxiliary cotton body 903. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention are described clearly and completely below. The embodiments of the present invention and all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-Figure 17 A high and low voltage prefabricated substation with good protection performance includes a substation body 1, a first maintenance side door 2, a second maintenance side door 3, a heat dissipation component and a protection auxiliary mechanism.

[0043] In this solution, a support base 11 is provided at the bottom end of the substation body 1, and a top cover 12 is provided on the top of the substation body 1; wherein a first maintenance side door 2 is provided on the front and rear sides of the substation body 1, and a second maintenance side door 3 is provided on the left and right sides of the substation body 1; in order to provide heat dissipation protection function for the interior of the substation, a heat dissipation window 21 is provided in the first maintenance side door 2, and a convex frame 22 is fixedly provided at the inner side opening position of the heat dissipation window 21; the heat dissipation window 21 is connected to the heat dissipation component.

[0044] That is, the heat dissipation component includes a carrier 401, an installation frame 402, a positioning slot 403, a heat dissipation cavity groove body 404 and a protective structure; a mounting frame 402 is fixedly arranged on one side of the carrier 401, and a positioning slot 403 is arranged on the side wall of the mounting frame 402, and heat dissipation cavity groove bodies 404 are arranged at equal intervals in the carrier 401; the mounting frame 402 and the convex frame 22 are fixedly connected by screws; a protective structure is arranged in the heat dissipation cavity groove body 404; the heat dissipation cavity groove body 404 is tilted, and the outer notch of the heat dissipation cavity groove body 404 is lower than the inner notch; the purpose of tilting the heat dissipation cavity groove body 404 here is to avoid blocking external impurities and water stains as much as possible when performing heat dissipation work; and in this scheme, a mounting frame 402 is arranged on one side of the carrier 401 and is fixedly connected to the convex frame 22, so that the heat dissipation component can be disassembled, which is convenient for subsequent maintenance and replacement.

[0045] In order to better achieve the heat dissipation effect of the heat dissipation window 21, the present invention further sets a fixed frame 501 in the heat dissipation cavity groove body 404, wherein an elastic card frame 503 is fixedly set on one side of the carrier plate 502, and the elastic card frame 503 is adapted to be clamped with the fixed frame 501, and ventilation slots 504 are equidistantly set on the carrier plate 502; a hollow cone tube 505 is fixedly set at the outer opening of the ventilation slot 504, and the end cone end of the hollow cone tube 505 is set to be blocked, and auxiliary side holes 506 are equidistantly set on the side of the hollow cone tube 505; wherein for the carrier plate 502, on the one hand, an elastic card frame 503 is set on one side of the carrier plate 502 to be clamped with the fixed frame 501, that is, the single body fixation of the carrier plate 502 is achieved, and when the disassembly, cleaning and maintenance work is carried out in the later stage, if only the carrier plate 502 needs to be disassembled, there is no need to The heat dissipation assembly is removed as a whole, that is, there is no need to disassemble the carrier 401 and the installation frame 402, and the first maintenance side door 2 is directly opened, and then the carrier plate 502 is pushed from the inside until the elastic clamping frame 503 and the fixed frame 501 are released, and then the carrier plate 502 can be cleaned or replaced; wherein a ventilation slot 504 is provided on the carrier plate 502 and a hollow conical tube 505 is provided at the opening position of the ventilation slot 504, wherein auxiliary side holes 506 are evenly provided on the sides of the hollow conical tube 505, the purpose of which is to further improve the dustproof protection effect on the basis of ensuring gas circulation, wherein the cone end of the hollow conical tube 505 is blocked and not opened, the purpose of which is to prevent splashing water stains or external impurities from directly entering from the opening position of the starting end.

[0046] When installing and fixing the carrier 502, the carrier 502 is directly placed into the heat dissipation cavity groove body 404 in the carrier body 401, wherein the side walls of the carrier 502 are in contact with the inner wall of the heat dissipation cavity groove body 404, and the carrier 502 is directly pushed until the elastic card frame 503 on one side of the carrier 502 is carded with the fixed frame body 501, and the installation and positioning of the carrier 502 can be completed, and the operation is convenient; in this scheme, a heat dissipation component is set at the position of the heat dissipation window 21, and the heat dissipation component can be disassembled as a whole when necessary. Compared with the existing one-piece heat dissipation groove set in the inspection door or the embedded heat dissipation groove, this scheme has better flexibility of use; furthermore, the carrier 502 with auxiliary protection in the heat dissipation cavity groove body 404 can also be disassembled separately, that is, to meet the needs of partial replacement of individual carriers 502, which can also provide a lot of convenience for the maintenance operations of the later staff.

[0047] In order to better improve the air circulation and heat dissipation effect, this solution is provided with a ventilation window 31 in the second inspection side door 3, and a protective auxiliary mechanism is provided on the ventilation window 31, that is, a protective cover body 601 is provided at the position of the ventilation window 31, and a rotation control motor 607 is provided in the protective cover body 601 to drive the auxiliary fan blades 609 to rotate, thereby improving the gas circulation therein, thereby improving the heat dissipation efficiency, and providing better protection work; that is, a fixed side plate 602 is fixedly provided on the outer side wall of the cover opening at one end of the protective cover body 601, and the fixed side plate 602 is fixedly connected to the second inspection side door 3 by screws, and the protective cover A heat dissipation protection hole 603 is provided at the other end of the protective cover body 601, and a dust collection groove 604 is provided in the protective cover body 601 and is close to the heat dissipation protection hole 603; mounting holes are symmetrically provided on the sides of the loading ring 605, and the loading ring 605 is fixed to the inner wall of the protective cover body 601 by screws, a support frame 606 is fixedly provided in the loading ring 605, a rotation control motor 607 is fixedly provided at the center position of the support frame 606, a connecting shaft is provided at one end of the rotation control motor 607, and a connecting head end 608 is provided at one end of the connecting shaft, and auxiliary fan blades 609 are fixedly provided at equidistant intervals on the sides of the connecting head end 608.

[0048] During ventilation and heat dissipation protection work, in order to prevent dust and impurities from accumulating excessively in the heat dissipation protection holes 603 at the end of the protective cover body 601 and even causing blockage, the present solution has a loading bar 701 fixed at the end of the connecting head end 608 by screws, and a cleaning brush 702 is provided on the loading bar 701. The rotation control motor 607 drives the connecting head end 608 to rotate, thereby driving the loading bar 701 to rotate, and the loading bar 701 then drives the cleaning brush 702 to clean the heat dissipation protection holes 603 at the end of the protective cover body 601, and most of the impurities after cleaning will be discharged from the dust collection groove 604 provided.

[0049] In this solution, the air circulation is improved by the rotation of the auxiliary fan blades 609 to perform auxiliary heat dissipation. In order to prevent the impurities of the circulating gas from entering the substation too much, an anti-impurity function is also provided here, that is, the auxiliary components include a first docking ring 801, a second docking ring 802, a connecting thread groove 803, an installation through-slot 804, a docking screw 805, a fixing plate 806, a first protective through-hole 807 and a second protective through-hole 808; a connecting thread groove 803 is provided on one side of the first docking ring 801, and an installation through-slot 804 is provided through the second docking ring 802. The first docking ring 801 and the second docking ring 802 are connected and fixed by the provided docking screws 805, and the docking screws 805 pass through the installation through-slot 804 in the second docking ring 802, and then are threadedly connected with the connecting thread groove 803 on the first docking ring 801. The first docking ring 801 and the second docking ring A fixed disc 806 is fixedly arranged on the inner side of both 802, a first protective through hole 807 is equidistantly arranged in the fixed disc 806 on the inner side of the first docking ring 801, and a second protective through hole 808 is equidistantly arranged in the fixed disc 806 on the inner side of the second docking ring 802; wherein the second protective through hole 808 and the first protective through hole 807 are staggered; a first limiting slot 901 is equidistantly arranged on one side of the fixed disc 806 in the first docking ring 801, and a second limiting slot 902 is equidistantly arranged on one side of the fixed disc 806 in the second docking ring 802, the second limiting slot 902 and the first limiting slot 901 are arranged in corresponding positions, the same number of groups, and the notch shape of the two is set to be circular, and the notch diameter is set to be equal; the first limiting slot 901 is adapted to be snap-fitted with one end of the columnar auxiliary cotton body 903, and the other end of the columnar auxiliary cotton body 903 is adapted to be snap-fitted with the second limiting slot 902.

[0050] The first protective through hole 807 and the second protective through hole 808 which are staggered have a blocking effect on a small amount of impurities entering, and provide an anti-impurity protection function. In order to further improve the protection effect, a plurality of columnar auxiliary cotton bodies 903 are arranged between the first docking ring 801 and the second docking ring 802, and one end of the columnar auxiliary cotton body 903 is clamped and installed in the first limiting slot 901, and the other end of the columnar auxiliary cotton body 903 is clamped and installed in the second limiting slot 902. The first docking ring 801 and the second docking ring 802 are docked and fixed by docking screws 805 to form a containing ring body, and the containing ring body is fixedly connected to the inner side of the protective cover body 601 by screws to realize a detachable setting.

[0051] In order to improve the convenience of later maintenance, the containing ring body is detachable, and the first docking ring 801 and the second docking ring 802 can also be disassembled, which is convenient for cleaning the dirt on the inside of the first docking ring 801 and the second docking ring 802, and cleaning or replacing the columnar auxiliary cotton body 903. Moreover, the columnar auxiliary cotton body 903 provided here, on the one hand, has an auxiliary adhesion barrier effect when performing anti-impurity protection; on the other hand, it can also provide a dry protection effect for moisture, and try to avoid moisture from entering the substation.

[0052] 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. A high and low voltage prefabricated substation with good protection performance, characterized by: It comprises a transformer substation body (1), a first maintenance side door (2), a second maintenance side door (3), a heat dissipation component and a protective auxiliary mechanism; A support base (11) is provided at the bottom of the substation body (1), and a top cover (12) is provided at the top of the substation body (1); The substation body (1) is provided with a first maintenance side door (2) on both sides of the front and rear, and a second maintenance side door (3) is provided on both sides of the left and right of the substation body (1); A heat dissipation window (21) is provided in the first inspection side door (2), and a convex frame (22) is fixedly provided at the inner opening of the heat dissipation window (21); the heat dissipation window (21) is connected to the heat dissipation component; A ventilation window (31) is provided in the second inspection side door (3), and a protective auxiliary mechanism is provided on the ventilation window (31).

2. A high and low voltage prefabricated substation with good protection performance according to claim 1, characterized in that: The heat dissipation assembly comprises a carrier (401), a mounting frame (402), a positioning slot (403), a heat dissipation cavity slot body (404) and a protective structure; the mounting frame (402) is fixedly arranged on one side of the carrier (401), and the side wall of the mounting frame (402) is provided with a positioning slot (403); and the heat dissipation cavity slot body (404) is equidistantly arranged in the carrier (401).

3. A high and low voltage prefabricated substation with good protection performance according to claim 2, characterized in that: The installation frame (402) and the convex frame (22) are fixedly connected by means of screws; and a protective structure is provided in the heat dissipation cavity groove body (404).

4. A high and low voltage prefabricated substation with good protection performance according to claim 2, characterized in that: The heat dissipation cavity groove body (404) is arranged to be inclined, and the outer groove opening of the heat dissipation cavity groove body (404) is lower than the inner groove opening.

5. A high and low voltage prefabricated substation with good protection performance according to claim 2, characterized in that: The protective structure comprises a fixed frame (501), a carrier plate (502), an elastic card frame (503), ventilation slots (504), a hollow cone tube (505) and an auxiliary side hole (506); the fixed frame (501) is fixedly arranged in a heat dissipation cavity slot (404); an elastic card frame (503) is fixedly arranged on one side of the carrier plate (502); the elastic card frame (503) is adapted to be clamped with the fixed frame (501); and ventilation slots (504) are equidistantly arranged on the carrier plate (502).

6. A high and low voltage prefabricated substation with good protection performance according to claim 5, characterized in that: A hollow conical tube (505) is fixedly provided at the outer opening of the ventilation slot (504), the conical end of the hollow conical tube (505) is configured to be blocked, and auxiliary side holes (506) are equidistantly provided on the sides of the hollow conical tube (505).

7. A high and low voltage prefabricated substation with good protection performance according to claim 1, characterized in that: The protective auxiliary mechanism comprises a protective cover body (601), a fixed side plate (602), a heat dissipation protection hole (603), a dust collection groove (604), a loading ring (605), a support frame (606), a rotation control motor (607), a connecting head end (608), an auxiliary fan blade (609) and an auxiliary component; a fixed side plate (602) is fixedly provided on the outer wall of the cover opening at one end of the protective cover body (601), and the fixed side plate (602) is fixedly connected to the second maintenance side door (3) by screws; the other end of the protective cover body (601) is provided with a heat dissipation protection hole (603), and the dust collection groove (604) is provided with a fixed side plate (602) on the outer wall of the cover opening at one end of the protective cover body (601). The loading ring (605) is arranged in the protective cover body (601) and is close to the heat dissipation protection hole (603); the sides of the loading ring (605) are symmetrically provided with mounting holes, and the loading ring (605) is fixedly provided on the inner wall of the protective cover body (601) by screws; a support frame (606) is fixedly provided in the loading ring (605); a rotation control motor (607) is fixedly provided at the center position of the support frame (606); a connecting shaft is provided at one end of the rotation control motor (607), and a connecting head end (608) is provided at one end of the connecting shaft; auxiliary fan blades (609) are fixedly provided at equal intervals on the sides of the connecting head end (608).

8. A high and low voltage prefabricated substation with good protection performance according to claim 7, characterized in that: A loading bar (701) is fixedly provided at the end of the connecting head end (608) by means of screws, and a cleaning brush (702) is provided on the loading bar (701).

9. A high and low voltage prefabricated substation with good protection performance according to claim 7, characterized in that: The auxiliary component comprises a first docking ring (801), a second docking ring (802), a connecting thread groove (803), an installation through-hole (804), a docking screw (805), a fixing plate (806), a first protective through-hole (807) and a second protective through-hole (808); a connecting thread groove (803) is provided on one side of the first docking ring (801), an installation through-hole (804) is provided through the second docking ring (802), and the first docking ring (801) and the second docking ring (802) are connected and fixed by the provided docking screw (805). The docking screw (805) passes through the installation through-slot (804) in the second docking ring (802) and is then threadedly connected to the connecting thread groove (803) on the first docking ring (801). A fixing disc (806) is fixedly arranged on the inner side of both the first docking ring (801) and the second docking ring (802). The fixing disc (806) on the inner side of the first docking ring (801) is provided with first protective through holes (807) at equal distances, and the fixing disc (806) on the inner side of the second docking ring (802) is provided with second protective through holes (808) at equal distances.

10. A high and low voltage prefabricated substation with good protection performance according to claim 7, characterized in that: The second protective through hole (808) and the first protective through hole (807) are staggered; a first limiting slot (901) is equidistantly arranged on one side of the fixed disk (806) in the first docking ring (801); a second limiting slot (902) is equidistantly arranged on one side of the fixed disk (806) in the second docking ring (802); the second limiting slot (902) and the first limiting slot (901) are arranged in corresponding positions and have the same number of groups; the shapes of the slots of the two are circular and the diameters of the slots are equal; the first limiting slot (901) is adapted to be snap-fitted with one end of the columnar auxiliary cotton body (903); and the other end of the columnar auxiliary cotton body (903) is adapted to be snap-fitted with the second limiting slot (902).

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