A distribution transformer insulation protective cover and installation tool

Abstract

The present invention relates to an insulating protective cover for a distribution transformer and an installation tool, belonging to the technical field of electric power devices, comprising a first cover body and a second cover body; the second cover body is connected to the first cover body and is arranged at an angle to the first cover body; the inner side plate of the first cover body is a first movable plate that can be opened, and the inner side plate of the second cover body is a second movable plate that can be opened, and the inner side of the cavity can be opened after the first movable plate and the second movable plate are opened; the first movable plate and the second movable plate both have a rebound structure; an installation tool is used to operate the above-mentioned protective cover. The beneficial effects of the present invention are: wide application; can effectively avoid interference with adjacent terminal posts or other external objects such as wiring, and improve the application range of the protective cover, especially in working conditions where the specifications and sizes of the terminal posts are different and the phase sequence spacing of the terminal posts are different; the installation tool can stably support the protective cover, which is a guarantee for ensuring that the support and fixed protective cover is not easy to fall off in the open state and completes the installation.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power devices, and in particular to an insulating protective cover for a distribution transformer and an installation tool. Background Art

[0002] As an important equipment in the distribution network, the distribution transformer can be equipped with an insulating protective cover on the transformer terminal to strengthen the insulation protection of the distribution transformer terminal, prevent human touch, electricity theft, small animals or debris from touching, etc., which may damage the power equipment and cause power outages and personal injuries caused by electric shock, thereby avoiding huge economic losses. At present, insulating protective covers are mainly used for protection.

[0003] When installing, the insulating protective cover needs to wrap the terminal posts and the connection ends of the wiring. The terminal posts and the wiring of some transformers have an angle. For example, the terminal posts and the wiring are perpendicular to each other, so the cavity inside the insulating protective cover is required to have an angle. In particular, the specifications and dimensions of the low-voltage terminal posts of transformers with different rated capacities are different, and the phase sequence spacing of the terminal posts is different. Under the constraints of factors such as the different sizes and specifications of the low-voltage terminal posts of transformers with different rated capacities, the span of the terminal shielding part of the cover body after opening is required not to exceed the phase-to-phase distance of the transformer terminal posts during installation. The existing hard and transparent insulating protective covers do not have the above functions.

[0004] In order to solve the above problems, the present invention provides an insulation protection cover for a distribution transformer and an installation tool. Summary of the Invention

[0005] In order to solve at least one of the above technical problems, the present invention provides an insulating protective cover for a distribution transformer, comprising a first cover body and a second cover body; the second cover body is connected to the first cover body and is arranged at an angle to the first cover body, and the cavities in the first cover body and the second cover body are interconnected to form a cavity; the end of the first cover body away from the second cover body is provided with a wire hole for passing the wiring, and the end of the second cover body away from the first cover body is provided with a pile hole for passing the wiring pile head; the inner side plate of the first cover body is a first movable plate that can be opened, and the inner side plate of the second cover body is a second movable plate that can be opened, and when the first movable plate and the second movable plate are opened, the inner side of the cavity can be opened; the first movable plate and the second movable plate both have a rebound structure, and the rebound structure is used to close the first movable plate or the second movable plate.

[0006] Preferably, the first movable panel and the second movable panel are expandable toward the same side of the protective cover, so that the expanded second movable panel can prevent the expanded first movable panel from rebounding.

[0007] Preferably, the first cover body and the second cover body are perpendicular to each other.

[0008] Preferably, a plurality of temperature measuring holes are provided on the side of the first cover body and / or the second cover body.

[0009] Preferably, a phase sequence identification silicone sheet is detachably mounted on the wire passing hole and / or the pile passing hole.

[0010] Preferably, the first cover body and the second cover body are both made of insulating and transparent materials.

[0011] An installation tool is also provided for operating the insulating protective cover of a distribution transformer, characterized in that it includes a rod structure and a clamp connected to the end of the rod structure; the clamp includes a first clamping part and a second clamping part; the first clamping part includes a support part abutting against the inner wall of the first cover body, a first support leg and a second support leg extending in the horizontal direction, the first support leg is used to clamp the second movable plate after it is opened and prevent the second movable plate from rebounding, and the second support leg is integrally connected to the second clamping part; the second clamping part extends in the vertical direction and is used to clamp the fixed part of the second cover body.

[0012] Preferably, a first groove is formed on the side of the first leg, which is clamped to the end of the second movable plate, and / or a second groove is formed on the end surface of the second leg, which is clamped to the fixing portion of the second cover.

[0013] Preferably, the first clamping portion is U-shaped.

[0014] Preferably, the rod structure includes a support rod and an insulating rod; one end of the support rod is rotatably connected to the chuck so that the chuck rotates relative to the support rod in a first plane, and the other end is rotatably connected to the insulating rod so that the support rod rotates relative to the insulating rod in a second plane, and the first plane and the second plane are perpendicular to each other.

[0015] The present invention has the following beneficial effects:

[0016] 1. The first cover body and the second cover body are arranged at an angle, so that the internal cavity of the protective cover has an angle, which can be applied to working conditions where the terminal head and the wiring are at an angle, and has a wider application;

[0017] 2. Both the first movable plate and the second movable plate are openable, and after they are opened, the inner side of the protective cover cavity can be opened, so that the protective cover can be directly put on the wiring pile and the wiring from the outside when the transformer is in operation, completing the live operation and improving the installation efficiency; at the same time, the first movable plate and the second movable plate are respectively the inner side plates of the first cover body and the second cover body, and the first movable plate and the second movable plate can be folded about 90 degrees to fully open the cavity. After opening, the width of the protective cover will not be significantly increased, which can effectively avoid interference with adjacent wiring piles or wiring and other foreign objects, thereby improving the application range of the protective cover, especially suitable for occasions where the spacing between adjacent wiring piles or wiring is close;

[0018] 3. The installation tool of the present invention supports the first cover body through the first clamping part, supports the second movable plate through the first support leg, and fixes the second cover body by vertically extending the second clamping part, and the three support positions are not in the same plane, thereby forming a stable spatial support structure. While preventing the second movable plate from rebounding, it stably supports the protective cover, which is the guarantee for supporting and fixing the protective cover so that it is not easy to fall off in the open state, thereby completing the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings illustrate exemplary embodiments of the present invention and together with the description serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0020] Figure 1 It is a schematic diagram of the installation tool clamping and opening the protective cover;

[0021] Figure 2 It is a schematic diagram of the structure when the protective cover is closed;

[0022] Figure 3 It is a schematic diagram of the structure when the protective cover is opened;

[0023] Figure 4 It is a structural diagram of the installation tool;

[0024] Figure 5 is another structural schematic diagram of the installation tool;

[0025] Figure 6 It is a structural diagram of the chuck;

[0026] In the figure: 1-first cover, 2-second cover, 3-wire hole, 4-pile hole, 5-first movable plate, 6-second movable plate, 7-temperature measuring hole, 8-phase sequence identification silicone sheet, 9-chuck, 10-transition connector, 11-support rod, 12-insulating rod, 13-first pressing gear bolt, 14-first locking buckle, 15-sleeve type connector, 16-second pressing gear bolt, 17-second locking buckle, 18-clamping protrusion,

[0027] 91 - first clamping portion, 92 - second clamping portion, 93 - first supporting leg, 94 - second supporting leg, 95 - first groove, 96 - second groove, 97 - supporting portion. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It will be understood that the specific embodiments described herein are intended only to explain the relevant content and are not intended to limit the present invention. It should also be noted that, for ease of description, only portions relevant to the present invention are shown in the accompanying drawings.

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] like Figures 1-6 As shown, an insulating protective cover for a distribution transformer includes a first cover body 1 and a second cover body 2; the second cover body 2 is connected to the first cover body 1 and is arranged at an angle to the first cover body 1, that is, one end of the first cover body 1 has an opening and the other end is closed, the second cover body 2 is connected to one side of the first cover body 1, and the cavities in the first cover body 1 and the second cover body 2 are connected to each other to form a cavity; the end of the first cover body 1 away from the second cover body 2 is provided with a wire hole 3 for passing the wiring, and the end of the second cover body 2 away from the first cover body 1 is provided with a pile hole 4 for passing the wiring pile head; the inner side plate of the first cover body 1 is a first movable plate 5 that can be opened, and the inner side plate of the second cover body 2 is a second movable plate 6 that can be opened, and the inner side of the cavity can be opened when the first movable plate 5 and the second movable plate 6 are opened; the first movable plate 5 and the second movable plate 6 both have a rebound structure, and the rebound structure is used to close the first movable plate 5 or the second movable plate 6.

[0031] With the above structure, the first cover body 1 and the second cover body 2 are arranged at an angle, so that the internal cavity of the protective cover has an angle, which can be applied to working conditions where the terminal post and the wiring are at an angle, and has a wider application; the first movable plate 5 and the second movable plate 6 are both expandable, and after the two are expanded, the inner side of the protective cover cavity can be opened, so that the protective cover can be directly put on the terminal post and the wiring from the outside when the transformer is running, completing the live operation, and the installation efficiency is high; at the same time, the first movable plate 5 and the second movable plate 6 are the inner side plates of the first cover body 1 and the second cover body 2 respectively, and the first movable plate 5 and the second movable plate 6 can be folded about 90° to fully open the cavity. After opening, the width of the protective cover will not be significantly increased, and interference with adjacent terminal posts or wiring and other foreign objects can be effectively avoided, thereby improving the application range of the protective cover, especially suitable for occasions where the spacing between adjacent terminal posts or wiring is close.

[0032] The aforementioned protective cover, based on the structural features of the transformer's terminal posts, provides shielded insulation protection, effectively insulating the terminal posts and preventing operational accidents such as single-pole grounding or phase-to-phase short circuits caused by foreign objects or small animals climbing on them during transformer operation, thereby improving power supply reliability. Furthermore, the unique cover opening structure ensures that the protective cover is not obstructed by the gap between the transformer's phase posts when open, allowing easy access over the terminal and lead-out wires to complete the installation of the protective cover. The protective cover's accompanying ground potential mounting accessories allow operators to install it using the ground potential insulating rod installation method, allowing a single operator to complete the installation of the protective cover on the ground, efficiently and conveniently, reducing production and maintenance costs.

[0033] It is worth noting that the above-mentioned inner side refers to the inner side of the angle between the first cover body 1 and the second cover body 2. Generally speaking, the second cover body 2 is connected to a position close to the closed end of the first cover body 1. At this time, the protective cover is L-shaped. At this time, the inner side refers to a single inner side; if the second cover body 2 is connected to the middle of the first cover body 1, the protective cover is T-shaped, and the inner side can be the inner side of the two angles on both sides of the second cover body 2, which can be applied to the working condition where the wiring post and the wiring are T-shaped; when the wiring post and the wiring are misaligned, or the space requires the upper and lower covers of the protective cover to be staggered, the first cover body 1 and the second cover body 2 can be staggered, or one of them can be a locally contracted structure.

[0034] In one embodiment, the first movable plate 5 and the second movable plate 6 can be opened and arranged to the same side of the protective cover, so that the opened second movable plate 6 can prevent the opened first movable plate 5 from rebounding. By blocking the rebound of the first movable plate 5 by the second movable plate 6, there is no need to add additional supporting legs to separately clamp the first movable plate 5, which can make the structure of the installation tool simpler and the processing difficulty lower, which is conducive to reducing production costs and making the operation easier.

[0035] In one embodiment, the first cover 1 and the second cover 2 are perpendicular to each other, which can be applied to a working condition where the terminal head and the wiring are perpendicular to each other.

[0036] Of course, in addition to this, the first cover body 1 and the second cover body 2 may also form an acute angle or an obtuse angle.

[0037] In one embodiment, a plurality of temperature measuring holes 7 are provided on the side of the first cover body 1 and / or the second cover body 2. The size of a single temperature measuring hole 7 should not be too large to avoid affecting the structural strength and protective performance of the cover body. A plurality of temperature measuring holes 7 can be provided and arranged in a straight line, which will not hinder the operation of the thermal imaging detector and can improve the convenience and accuracy of temperature measurement.

[0038] In one embodiment, a phase sequence identification silicone sheet 8 is detachably installed on the wire hole 3 and / or the pile hole 4. The phase sequence identification silicone sheet 8 distinguishes the phase sequence of each wiring through different colors such as red, green, and blue. At the same time, the end of the phase sequence identification silicone sheet 8 is gradually narrowed so that its end fits the wiring, which has a certain dust-proof and foreign body-proof effect.

[0039] In a further solution, an elliptical clipping hole is provided on one side of the protective cover close to the wire hole 3 and / or the pile hole 4, and the phase sequence identification silicone sheet 8 has a clipping protrusion 18 with an elliptical cross-sectional shape matching the clipping hole, and the phase sequence identification silicone sheet 8 is fixedly connected to the protective cover through the clipping protrusion 18 and the clipping hole; such a setting facilitates the installation and disassembly operations between the phase sequence identification silicone sheet 8 and the protective cover; specifically, the protective cover is provided with 4 clipping holes corresponding to each phase sequence identification silicone sheet 8 at evenly spaced circumferential intervals, and the phase sequence identification silicone sheet 8 is provided with 4 clipping protrusions 18 at evenly spaced circumferential intervals; such a setting not only ensures that the installation and disassembly operations between the phase sequence identification silicone sheet 8 and the protective cover are quick and easy, but also ensures that the connection between the two is stable and reliable.

[0040] In one embodiment, the first cover body 1 and the second cover body 2 are both made of insulating and transparent materials, specifically modified ABS, UV-resistant PET, UV-resistant PC, weather-resistant nylon and other transparent materials. Inspection personnel can directly observe the operating status of the equipment, and promptly discover conditions such as equipment heating, loose terminal blocks, broken pile heads, and traces of strong fire, thereby improving the quality of operation inspections and ensuring the safety of power grid operation. At the same time, the material has a certain hardness, good structural support, and a relatively high thermal deformation temperature. During operation, the equipment wiring pile heads are always kept in a shielded and isolated operating state to meet the needs of ventilation and heat dissipation during equipment operation. Compared with traditional flexible materials, the above-mentioned materials can realize live operations.

[0041] In one embodiment, the first cover body 1 and the second cover body 2 are integrally formed, one end of the first movable plate 5 is integrally connected to the first cover body 1, and the other three ends have slits between them and the first cover body 1; one end of the second movable plate 6 is integrally connected to the second cover body 2, and the other three ends have slits between them and the second cover body 2. The main method of rebounding is the elastic recovery force of the material itself. When the first movable plate 5 or the second movable plate 6 is opened, elastic deformation occurs. After the external force is released, the deformation force causes the first movable plate 5 or the second movable plate 6 to automatically rebound and close.

[0042] Of course, the first movable plate 5 and the first cover body 1, the second movable plate 6 and the second cover body 2 can also be a two-piece split structure. When it is a two-piece split structure, it is connected by a torsion spring, an elastic member, a magnet or other recoverable and snap-fitting structure, so that the first movable plate 5 or the second movable plate 6 can obtain a restoring force while opening under the action of an external force or a tool such as grabbing, clamping, or clamping, and can also recover after the external force is released, or use a tool such as grabbing, clamping, or clamping to operate the first movable plate 5 or the second movable plate 6, and use a magnet to absorb or fix it with a fastener to complete the recovery of the first movable plate 5 or the second movable plate 6.

[0043] In a further embodiment, the cross section of the first cover body 1 or the second cover body 2 is circular, elliptical, square, a square chamfered structure or other irregular arc shapes.

[0044] like Figure 4-Figure 6 As shown, the present invention also provides an installation tool for operating an insulating protective cover of a distribution transformer, characterized in that: it includes a rod structure and a clamp 9 connected to the end of the rod structure; the clamp 9 includes a first clamping portion 91 and a second clamping portion 92; the first clamping portion 91 includes a support portion 97 abutting against the inner wall of the first cover body 1, a first support leg 93 and a second support leg 94 extending in the horizontal direction, the first support leg 93 is used to clamp the second movable plate 6 after it is opened and prevent the second movable plate 6 from rebounding, and the second support leg 94 is integrally connected to the second clamping portion 92; the second clamping portion 92 extends in the vertical direction and is used to clamp the fixing portion of the second cover body 2.

[0045] With the above structure, the first cover body 1 is supported by the first clamping portion 91, the second movable plate 6 is supported by the first support leg 93, and the second cover body 2 is fixed by the second clamping portion 92 extending vertically, and the three supporting positions are not in the same plane, thereby forming a stable spatial support structure. While preventing the second movable plate 6 from rebounding, it stably supports the protective cover, which ensures that the supported and fixed protective cover is not easy to fall off in the open state, thereby completing the installation.

[0046] By using the installation tools, operators can complete the installation of the protective cover on the ground through the matching ground potential working accessories when the power grid is in operation. This is economical, efficient and safe.

[0047] In one embodiment, a first groove 95 is provided on the side of the first support leg 93, and the first groove 95 is clamped to the end of the second movable plate 6, and / or a second groove 96 is provided on the end surface of the second support leg 94, and the second groove 96 is clamped to the fixed part of the second cover body 2. The fixed part here refers to the part of the second cover body 2 that cannot move except the second movable plate 6. The groove structure is used for clamping. Of course, in addition to the initial structure, structures such as blocks and splints can also be used.

[0048] In one embodiment, the first clamping portion 91 is U-shaped. The cross-section of the first cover body 1 in this embodiment is rectangular. Therefore, the U-shaped first clamping portion 91 can fit more closely to the inner wall of the first cover body 1 and provide better support. Of course, if the first cover body 1 adopts other structures such as a circular cross-section, the first clamping portion 91 can follow the changes and can provide stable support.

[0049] In one embodiment, the rod structure includes a support rod 11 and an insulating rod 12. One end of the support rod 11 is rotatably connected to the clamp 9, allowing the clamp 9 to rotate within a first plane relative to the support rod 11. The other end of the support rod 11 is rotatably connected to the insulating rod 12, allowing the support rod 11 to rotate within a second plane relative to the insulating rod 12. The first and second planes are perpendicular to each other. In this embodiment, the first plane can be a horizontal plane, thereby enabling horizontal rotation of the clamp 9 relative to the rod structure for angular adjustment. The second plane is a vertical plane, thereby enabling vertical rotation of the clamp 9 relative to the rod structure for angular adjustment.

[0050] In the specific scheme, a first pressing gear bolt 13 perpendicular to the enclosed plane of the chuck 9 is provided at the position where the chuck 9 is connected to the support rod 11. The enclosed plane here refers to the plane enclosed by the U-shaped first clamping part 91. Specifically, a transition connector 10 can be provided between the chuck 9 and the support rod 11. The transition connector 10 is perpendicular to the enclosed plane of the chuck 9 and can have a certain curvature to avoid the phase sequence identification silicone sheet 8; a first locking buckle 14 is provided at the position where the support rod 11 is connected to the chuck 9; the first locking buckle 14 is engaged with the first pressing gear bolt 13 and can rotate around the first pressing gear bolt 13 under the action of external force; and / or a sleeve-type connecting piece 15 is provided at the end of the support rod 11, and a second pressing gear bolt 16 parallel to the enclosed plane of the chuck 9 is provided on the connecting piece; a second locking buckle 17 is provided at one end of the insulating rod 12; the second locking buckle 17 is engaged with the second pressing gear bolt 16 and can rotate around the second pressing gear bolt 16 under the action of external force.

[0051] The first pressing gear bolt 13 and the second pressing gear bolt 16 are both conventional parts in the mechanical field. When the bolt is pressed from the rear end, the gear cap at the head of the first pressing gear bolt 13 pops out of the gear hole. At this time, the position of the chuck 9 can be adjusted by rotation. After the adjustment is completed, the gear cap at the head of the pressing gear bolt is pressed back into the first gear hole to achieve locking. Alternatively, a return spring can be provided in the middle of the pressing gear bolt to automatically reset the lock under the action of the spring force. The pressing gear bolt can slide along its axial direction. The middle cross-section of the pressing gear bolt is square and is clamped to the first locking buckle 14 or the sleeve-type connecting member 15 to limit its circumferential displacement.

[0052] The installation tool drives the chuck 9 and the support rod 11 to rotate through two sets of push-type gear rotating shafts. During installation, they can move in four directions: horizontally and up and down, ensuring that on-site operations are not affected by the operating angle. The transformer protective cover and the matching insulating operating rod are scientific and practical, with fast installation, low cost, and rapid fault elimination, and have application value, and have wide use and promotion significance.

[0053] The operation process is as follows: first manually open the first movable plate 5 and the second movable plate 6, as shown in FIG. Figure 1 、 Figure 3 As shown, the second movable plate 6 is located on the inner side of the first movable plate 5, the first clamping portion 91 of the clamp 9 is extended into the wire hole 3 of the first cover 1, and the first leg 93 of the clamp 9 is clamped to the second movable plate 6, so that the second clamping portion 92 of the clamp 9 is clamped to the fixed portion of the second cover 2, the first movable plate 5 and the second movable plate 6 are stretched open, and the inner side of the cavity is opened, and the protective cover is kept in an open state as a whole, so that the transformer terminal post and wiring can be passed through, the transformer post and wiring are shielded and fixed to the top of the transformer;

[0054] The cooperation of the first pressing gear bolt 13 set on one side of the chuck 9 and the first locking buckle 14 set at the connection position of the rod body structure and the chuck 9 can realize the horizontal rotation of the chuck 9 relative to the rod body structure for angle adjustment; the cooperation of the second pressing gear bolt 16 set on the connecting piece and the second locking buckle 17 set on the upper end of the insulating rod 12 can realize the vertical rotation of the chuck 9 and the support rod 11 relative to the insulating rod 12 for angle adjustment; the operator holds the insulating rod 12 and carries the matching tools and protective cover, and releases the tool after passing over the transformer wiring, so that the protective cover completes the shielding of the transformer column head and the fixation of the wiring, completing the installation of the equipment. The release method only needs to swing the insulating rod 12 after the protective cover is installed in place to move and disengage the chuck 9, and the first movable plate 5 and the second movable plate 6 automatically rebound and close the cavity, and the open state of the protective cover can be restored, thereby achieving effective covering and insulation protection for the transformer wiring part.

[0055] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0057] It should be understood by those skilled in the art that the above embodiments are merely for the purpose of illustrating the present invention clearly, and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and such changes or modifications are still within the scope of the present invention.

Claims

1. An insulation protective cover for a distribution transformer, characterized in that: It comprises a first cover body (1) and a second cover body (2); The second cover body (2) is connected to the first cover body (1) and is arranged at an angle with the first cover body (1); the cavities in the first cover body (1) and the second cover body (2) are mutually connected to form a cavity; the end of the first cover body (1) away from the second cover body (2) is provided with a wire hole (3) for passing the wiring, and the end of the second cover body (2) away from the first cover body (1) is provided with a pile hole (4) for passing the wiring pile; The inner side plate of the first cover body (1) is a first movable plate (5) that can be opened, and the inner side plate of the second cover body (2) is a second movable plate (6) that can be opened. When the first movable plate (5) and the second movable plate (6) are opened, the inner side of the cavity can be opened; The first movable panel (5) and the second movable panel (6) both have a rebound structure, and the rebound structure is used to close the first movable panel (5) or the second movable panel (6); The first movable plate (5) and the second movable plate (6) are arranged to be openable toward the same side of the protective cover, so that the second movable plate (6) after opening can prevent the first movable plate (5) from rebounding after opening; The first cover body (1) and the second cover body (2) are perpendicular to each other.

2. The insulating protective cover for a distribution transformer according to claim 1, characterized in that: Several temperature measuring holes (7) are provided on the side of the first cover body (1) and / or the second cover body (2).

3. The insulating protective cover for a distribution transformer according to claim 1, characterized in that: A phase sequence identification silicone sheet (8) is detachably mounted on the wire hole (3) and / or the pile hole (4).

4. The insulating protective cover for a distribution transformer according to claim 1, wherein: The first cover body (1) and the second cover body (2) are both made of insulating and transparent materials.

5. An installation tool for operating an insulation protective cover for a distribution transformer according to any one of claims 1 to 4, characterized in that: It comprises a rod structure and a clamp (9) connected to the end of the rod structure; The clamping head (9) comprises a first clamping portion (91) and a second clamping portion (92); The first clamping portion (91) comprises a supporting portion (97) abutting against the inner wall of the first cover body (1), a first support leg (93) and a second support leg (94) extending in a horizontal direction, wherein the first support leg (93) is used to clamp the second movable plate (6) after it is opened and prevent the second movable plate (6) from rebounding, and the second support leg (94) is integrally connected to the second clamping portion (92); The second clamping portion (92) extends in a vertical direction and is used for clamping the fixing portion of the second cover body (2).

6. The installation tool according to claim 5, characterized in that: A first groove (95) is provided on the side of the first support leg (93), and the first groove (95) is clamped to the end of the second movable plate (6), and / or A second groove (96) is provided on the end surface of the second support leg (94), and the second groove (96) is clamped to the fixing portion of the second cover body (2).

7. The installation tool according to claim 5, characterized in that: The first clamping portion (91) is U-shaped.

8. The installation tool according to claim 5, wherein: The rod structure comprises a support rod (11) and an insulating rod (12); one end of the support rod (11) is rotatably connected to the clamp (9), so that the clamp (9) rotates relative to the support rod (11) in a first plane, and the other end is rotatably connected to the insulating rod (12), so that the support rod (11) rotates relative to the insulating rod (12) in a second plane, and the first plane and the second plane are perpendicular to each other.

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