Protection box assembly and transformer

Abstract

The utility model discloses a protection box assembly and a transformer, the protection box assembly is used for protecting a valve assembly, the protection box assembly comprises a mounting plate, the valve assembly is mounted on the mounting plate, and the mounting plate is arranged at a preset position; the box body is rotatably connected with the mounting plate, a cavity with one open end is formed in the box body, the open end of the box body can abut against the mounting plate, and the valve assembly is arranged in the cavity in a covering mode. The mounting plate is a mounting carrier of the valve assembly, the valve assembly can be fixed to the preset position through the mounting plate, and the box body is arranged in the cavity in a covering mode so that the valve assembly can be prevented from being exposed, the valve assembly can be protected, the service life of the valve assembly can be prolonged, and the functionality of the valve assembly can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a protection box assembly and a transformer. Background Art

[0002] At present, the combined transformer (American transformer) for photovoltaic power generation is an important part of the photovoltaic power generation system, and the pressure relief valve is a protection component of the transformer, and the oil tank can be guaranteed through the pressure relief valve.

[0003] In the related art, the pressure relief valve is usually exposed to the external environment, so that the pressure relief valve is easily corroded and damaged, affecting the function of the pressure relief valve, and further causing potential safety hazards at the transformer, such as: oil tank deformation, transformer explosion, etc. Summary of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a protection box assembly, which can protect the valve assembly through the protection box assembly.

[0005] The utility model also provides a transformer.

[0006] According to the protection box assembly of the first aspect embodiment of the present application, the protection box assembly is used to protect the valve assembly, and the protection box assembly includes: a mounting plate, on which the valve assembly is mounted, and the mounting plate is at a preset position; a box body, which is rotatably connected to the mounting plate, and the box body forms a cavity with one end open, and the open end of the box body can abut against the mounting plate and cover the valve assembly in the cavity.

[0007] According to the protection box assembly of the embodiment of the utility model, the mounting plate is the mounting carrier of the valve assembly, and the valve assembly can be fixed at the preset position through the mounting plate, and by covering the box body in the cavity, the valve assembly can be prevented from being exposed, so as to protect the valve assembly, extend the service life of the valve assembly, and ensure the functionality of the valve assembly.

[0008] According to some embodiments of the utility model, the protection box assembly further includes a fixing member, and the fixing member is used to lock and fix the box body and the mounting plate.

[0009] According to some embodiments of the utility model, the mounting plate is provided with a connecting portion, the connecting portion is located inside the cavity and is disposed opposite to the wall surface of the box body, and the connecting portion is used to be connected to the fixing member; the box body is provided with a mounting hole opposite to the connecting portion, and the mounting hole is used for the fixing member to pass through.

[0010] According to some embodiments of the present utility model, a connecting plate is provided on the mounting plate, and at least a part of the connecting plate is opposite to and spaced from the wall surface of the box body where the mounting hole is provided, and the connecting portion is formed on the connecting plate.

[0011] According to some embodiments of the present utility model, the connecting portion is configured as a threaded hole, and the fixing member includes: a rod portion provided with a threaded section, the threaded section can pass through the box body and is used for threadedly connecting with the threaded hole; a head portion connected to one end of the rod portion and provided outside the box body.

[0012] According to some embodiments of the present utility model, a fixing sleeve is provided on the outer wall of the box body, and the fixing sleeve extends from the outer wall of the box body away from the box body and is used for shielding the fixing member.

[0013] According to some embodiments of the present utility model, the head portion is provided with a driving groove, and the protection box assembly further includes an unlocking member, the unlocking member is adapted to the shape of the driving groove and is used for driving the head portion to rotate to lock or unlock the fixing member and the connecting portion.

[0014] According to some embodiments of the present utility model, the box body includes: a top wall and a bottom wall, the top wall and the bottom wall are opposite and spaced in the vertical direction; a side wall connected between the top wall and the bottom wall and defining the opening with the top wall and the bottom wall, and a side of the side wall adjacent to the opening is pivotally connected to the mounting plate; wherein, the mounting hole is formed on the side wall.

[0015] According to some embodiments of the present utility model, the protection box assembly further includes: a first hinge portion provided on the box body; a second hinge portion provided on the mounting plate, and the first hinge portion and the second hinge portion are hinged together, and the box body can rotate relative to the mounting plate around the rotation axis.

[0016] The transformer according to the second aspect embodiment of the present utility model includes the above-mentioned protection box assembly.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a cross-section of the protection box assembly according to an embodiment of the present utility model Figure 1 ;

[0020] Figure 2 is a cross-section of the protective box assembly according to an embodiment of the present utility model Figure 2 ;

[0021] Figure 3 is a cross-section of the protective box assembly according to an embodiment of the present utility model Figure 3 ;

[0022] Figure 4 is a cross-section of the protective box assembly according to an embodiment of the present utility model Figure 4 .

[0023] Reference numerals:

[0024] Protective box assembly 100; transformer 200; pressure relief valve 201;

[0025] Mounting plate 1; connecting plate 12;

[0026] Box body 2; side wall 21; bottom wall 22; fixing sleeve 23; top wall 24;

[0027] Fixing member 3; rod portion 31; head portion 32; first hinge portion 41; second hinge portion 42. Detailed implementation manners

[0028] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0029] Reference is made below to Figures 1 - 4 Describe the protective box assembly 100 according to an embodiment of the present utility model. The protective box assembly 100 can protect the valve assembly to prevent the valve assembly from being damaged by exposure to the air. Among them, the valve assembly can be configured as a pressure relief valve 201. The pressure relief valve 201 is applicable to an oil-immersed power transformer 200 and can be used to protect the oil tank and balance the pressure. In the present utility model, the valve assembly is taken as an example of the pressure relief valve 201 for description.

[0030] At present, the combined transformer 200 (American transformer) for photovoltaic power generation is an important part of the photovoltaic power generation system, and the pressure relief valve 201 is a protective component of the transformer 200. Through the pressure relief valve 201, the oil tank can be ensured. In the related art, the pressure relief valve 201 is usually exposed to the external environment, resulting in the pressure relief valve 201 being easily corroded and damaged, affecting the function of the pressure relief valve 201, and further causing potential safety hazards at the transformer 200, such as: oil tank deformation, explosion of the transformer 200, etc.

[0031] In the present utility model, the protection box assembly 100 includes a mounting plate 1 and a box body 2.

[0032] Among them, the pressure relief valve 201 is installed on the mounting plate 1, and the mounting plate 1 is at a preset position on the transformer 200, so as to fix the pressure relief valve 201 on the transformer 200 through the mounting plate 1 and realize the protection function of the pressure relief valve 201.

[0033] Furthermore, the box body 2 is rotatably connected to the mounting plate 1, and the box body 2 forms a cavity with one end open. The open end of the box body 2 can abut against the mounting plate 1, and the box body 2 can cover the pressure relief valve 201 in the cavity to prevent the pressure relief valve 201 from being exposed and play a protective role for the pressure relief valve 201.

[0034] It should be noted that the above-mentioned "preset position" refers to the installation position in the transformer 200 for arranging the mounting plate 1 and assembling the pressure relief valve 201 on the mounting plate 1 to be suitable for cooperating with the fuel tank. Among them, the box body 2 can be flipped relative to the mounting plate 1, and the pressure relief valve 201 can be selectively exposed or blocked by flipping the box body 2.

[0035] It can be understood that when it is necessary to repair or replace the pressure relief valve 201, the box body 2 can be opened to expose the pressure relief valve 201 for easy operation by the operator; when it is necessary to protect the pressure relief valve 201, the open end of the box body 2 abuts against the mounting plate 1 to arrange the pressure relief valve 201 in the cavity. At this time, the box body 2 can play a blocking role for the pressure relief valve 201, thereby preventing the pressure relief valve 201 from being exposed, reducing the risk of the pressure relief valve 201 being contaminated and damaged, and further ensuring the protection function of the pressure relief valve 201 and improving the safety and reliability of the transformer 200.

[0036] Among them, a space for avoiding the pressure relief valve 201 is reserved in the box body 2. During the process of the box body 2 being buckled on the mounting plate 1, the pressure relief valve 201 arranged on the mounting plate 1 extends into the cavity from the open end of the box body 2.

[0037] According to the protection box assembly 100 of the embodiment of the present utility model, the mounting plate 1 is an installation carrier for the valve assembly. The valve assembly can be fixed at a preset position through the mounting plate 1, and by covering the box body 2 in the cavity, the valve assembly is prevented from being exposed, playing a protective role for the valve assembly, prolonging the service life of the valve assembly, and ensuring the functionality of the valve assembly.

[0038] Such as Figure 2 and Figure 3As shown, in some embodiments of the present utility model, the protection box assembly 100 further includes a fixing member 3, and the fixing member 3 is used to lock and fix the box body 2 to the mounting plate 1 to prevent the box body 2 from separating from the mounting plate 1 and improve the reliability of the protection assembly.

[0039] It can be understood that the box body 2 and the mounting plate 1 are in a connected state, and the box body 2 can rotate relative to the mounting plate 1. The fixing member 3 can lock and fix the box body 2 and the mounting plate 1 to prevent the box body 2 from rotating relative to the mounting plate 1, so as to keep the box body 2 in the position where it is buckled on the pressure release valve 201, and the box body 2 plays a role in protecting the pressure release valve 201.

[0040] In some embodiments of the present utility model, the mounting plate 1 is provided with a connecting portion, the connecting portion is disposed opposite to the wall surface of the box body 2, and the connecting portion is used to be connected to the fixing member 3. The box body 2 is provided with a mounting hole opposite to the connecting portion, and the mounting hole is used for the fixing member 3 to pass through. The fixing member 3 can pass through the mounting hole and be connected and matched with the connecting portion located inside the cavity.

[0041] That is to say, the fixing member 3 is installed from the outside of the box body 2, extends into the cavity through the mounting hole and is connected to the connecting portion, and the box body 2 and the mounting plate 1 are fixed by the fixing member 3.

[0042] It should be noted that the connecting portion can be configured as a part of the mounting plate 1, such as: a hole structure, a connecting seat, etc.; the connecting portion can also be a component independent of the mounting plate 1, for example: a plate structure, a bolt, etc., and the connecting portion can also be a connecting structure (such as: a threaded hole) on the component (i.e., the plate structure, the bolt).

[0043] Such as Figure 2 and Figure 3 As shown, in some embodiments of the present utility model, a connecting plate 12 is provided on the mounting plate 1, at least a part of the connecting plate 12 is opposite to and spaced from the wall surface of the box body 2 where the mounting hole is provided, and the connecting portion is formed on the connecting plate 12.

[0044] Wherein, the fixing member 3 passes through the mounting hole and extends into the cavity to be connected and matched with the connecting plate 12, so as to fasten the box body 2 and the connecting plate 12 by the fixing member 3 and prevent the box body 2 from rotating relative to the mounting plate 1.

[0045] In some embodiments of the present utility model, the connecting portion is configured as a threaded hole, and the threaded hole is formed on the connecting plate 12. The fixing member 3 is configured as a bolt, and the screw rod section of the bolt extends into the cavity through the mounting hole and is threadedly matched with the threaded hole, so as to fix the connecting plate 12 and the box body 2, and further fix the mounting plate 1 and the box body 2. The connection method is simple and easy to operate.

[0046] In some embodiments of the present utility model, the connecting plate 12 is perpendicular to the mounting plate 1.

[0047] In some other embodiments of the present utility model, the connecting portion is configured with a threaded hole, the fixing member 3 is configured as a threaded connecting member, and the threaded connecting member includes: a rod portion 31 and a head portion 32. The rod portion 31 is provided with a threaded section, the threaded section can pass through the box body 2, and the threaded section is used for threaded connection with the threaded mating portion. The head portion 32 is connected to one end of the rod portion 31, and the head portion 32 is arranged outside the box body 2 to facilitate the operation of the fixing member 3 by the operator.

[0048] It can be understood that during the assembly process of the fixing member 3, one end of the rod portion 31 (without the head portion 32) passes through the mounting hole from the outside to the inside and extends into the cavity to be threadedly connected with the threaded hole. The head portion 32 can abut against the outer wall surface of the box body 2 and be locked with the outer wall of the box body 2, so as to connect and fix the box body 2 and the mounting plate 1 through the fixing member 3.

[0049] Among them, the operator can drive the rod portion 31 to rotate by driving the head portion 32 from outside the box body 2, so as to thread the threaded section with the threaded hole, reducing the operation difficulty of the fixing member 3. It should be noted that the operator can twist the head portion 32 by means of hand-held or tool-driven to drive the fixing member 3 to rotate.

[0050] Such as Figure 2 and Figure 3 As shown, in some embodiments of the present utility model, the outer wall of the box body 2 is provided with a fixing sleeve 23. The fixing sleeve 23 extends from the outer wall of the box body 2 to the side away from the box body 2 to form a shielding structure at the mounting hole, so as to shield the fixing member 3 and the mounting hole through the fixing sleeve 23, preventing dust and other pollutants outside the box body 2 from entering the cavity through the mounting hole and polluting the pressure release valve 201.

[0051] In a further embodiment of the present utility model, the fixing sleeve 23 is arranged around the mounting hole in the circumferential direction, and the fixing sleeve 23 extends along the axial direction of the mounting hole (which is also the insertion direction of the fixing member 3), so as to fully shield the mounting hole through the fixing sleeve 23 and improve the protection effect of the fixing sleeve 23 on the mounting hole. It can be understood that one end of the fixing sleeve 23 away from the box body 2 is formed with an avoidance opening, and the avoidance opening is arranged opposite to the mounting hole to expose the fixing member 3 through the avoidance opening, facilitating the operation of the fixing member 3 by the operator.

[0052] In some embodiments of the present utility model, the protection box assembly 100 further includes a nut. The nut is arranged on the mounting plate 1 or the connecting plate 12, and the threaded hole of the nut is arranged opposite to the mounting hole. When the fixing member 3 passes through the mounting hole, it can extend towards the nut side and be threadedly connected with the threaded hole. It can be understood that when the nut is arranged on the connecting plate 12, the connecting plate 12 can be provided with a through-hole structure opposite to the threaded hole to avoid the components of the fixing member 3 passing through the nut, preventing interference between the connecting plate 12 and the fixing member 3.

[0053] In some embodiments of the present utility model, the head 32 of the fixing member 3 is provided with a driving groove, and the protection box assembly 100 further includes an unlocking member. The unlocking member is adapted to the shape of the driving groove, and the unlocking member is used to drive the head 32 to rotate so as to lock or unlock the fixing member 3 and the connecting portion. It can be understood that the unlocking member is a driving structure cooperating with the fixing member 3. An operator can drive the fixing member 3 to rotate through the unlocking member so as to screw the fixing member 3 into or out of the threaded hole, thereby playing a role in assisting the installation of the fixing member 3.

[0054] It should be noted that the shape of the unlocking member is adapted to the shape of the driving groove. For example, when the opening shape of the driving groove is pentagonal, the unlocking end of the unlocking member is also configured as a pentagon, so that the unlocking end of the unlocking member can extend into the driving groove, and the driving of the fixing member 3 to rotate is realized through the cooperation between the unlocking end and the driving groove. Among them, the shape of the driving groove can also be configured as a special-shaped groove structure, such as a triangle, a trapezoid, etc., so that the fixing member 3 can only be driven to open by a specific tool (i.e., the unlocking member in the present utility model), avoiding the protection box assembly 100 from being opened randomly, and further improving the safety of the protection box assembly 100.

[0055] Combined with Figure 1 、 Figure 2 and Figure 3 As shown, in some embodiments of the present utility model, the top wall 24, the bottom wall 22, and the side wall 21 connected between the top wall 24 and the bottom wall 22. The top wall 24 and the bottom wall 22 are opposite and spaced apart in the vertical direction. The side wall 21 and the top wall 24 and the bottom wall 22 jointly define an opening. One side of the side wall 21 adjacent to the opening is pivotally connected to the mounting plate 1.

[0056] Wherein, the mounting hole is formed on the side wall 21. It can be understood that when the mounting hole is formed on the side wall 21, the mounting hole is in an area convenient for an operator to operate, and the mounting hole opens laterally, which can reduce the risk of pollutants entering the cavity through the mounting hole. If the mounting hole is formed on the top wall 24, pollutants such as rainwater or dust are likely to accumulate at the mounting hole and enter the cavity through the mounting hole; if the mounting hole is formed on the bottom wall 22, it is not convenient for the operator to operate the fixing member 3.

[0057] Combined with Figures 1 - 3 In the present utility model, the box body 2 is constructed in a cuboid shape, and three side plates are connected between the top plate and the bottom plate. Among them, the first side plate of the three side plates is opposite and spaced apart from the mounting plate 1. The mounting hole is formed on the second side plate of the other two side plates. The third side plate is connected to the mounting plate 1 through a rotating assembly (such as a hinge, a hinge, etc.).

[0058] In some embodiments of the present utility model, the protection box assembly 100 further includes: a first hinge portion 41 and a second hinge portion 42. The first hinge portion 41 is provided on the box body 2, and the second hinge portion 42 is provided on the mounting plate 1. The first hinge portion 41 and the second hinge portion 42 are hingedly engaged, and the box body 2 can rotate relative to the mounting plate 1 about a rotation axis.

[0059] Thus, the box body 2 and the mounting plate 1 can be rotatably connected through the first hinge portion 41 and the second hinge portion 42. Referring to Figure 2 and Figure 3 it can be seen that the rotation axis is located outside the box body 2 to ensure the opening angle of the box body 2.

[0060] In some embodiments, when the protection box assembly 100 is installed on the transformer 200, the rotation axis is arranged in the vertical direction, so that the box body 2 can be laterally flipped relative to the mounting plate 1, facilitating the operation of the operator on the box body 2.

[0061] Referring to Figure 3 , the mounting hole is provided on a side wall 21 surface of the box body 2 away from the rotation axis. Wherein, the connecting plate 12 is arranged on the mounting plate 1 and is located adjacent to the side wall 21 where the mounting hole is formed, and the connecting plate 12 is arranged opposite to the side wall 21. Thus, when the fixing member 3 is in locking cooperation with the connecting plate 12, the locking force arm (i.e., the distance between the rotation axis and the locking position of the fixing member 3 and the connecting plate 12) can be ensured, and the locking cooperation effect of the fixing member 3 can be ensured.

[0062] In some embodiments of the present utility model, the protection box assembly 100 further includes a sealing member (not shown). The sealing member is clamped between the open end of the box body 2 and the mounting plate 1 to improve the sealing performance at the joint between the box body 2 and the mounting plate 1, reduce the risk of water, dust and other pollutants entering the cavity and contaminating the pressure relief valve 201, and improve the protection effect of the protection box assembly 100 on the pressure relief valve 201.

[0063] Referring to Figure 3 and Figure 4 , the flipping and opening manner of the box body 2 relative to the mounting plate 1 can be designed according to the assembly position of the protection box assembly 100 to ensure the smooth opening of the box body 2 and prevent interference between the box body 2 and other components during the opening process.

[0064] In some embodiments of the present application, the box body 2 is formed by welding multiple cover plates; in some other embodiments of the present application, the box body 2 is formed by bending a steel plate. Wherein, the wall thickness of the box body 2 is preferably in the range of 1 mm - 3 mm, preferably 2 mm, but not limited thereto.

[0065] The transformer 200 according to the embodiments of the present application includes the above-mentioned protection box assembly 100.

[0066] Among them, a pressure relief valve 201 is provided in the transformer 200, and the pressure relief valve 201 is installed at the oil tank through the mounting plate 1 to improve the safety of the transformer 200 through the pressure relief valve 201. Moreover, the pressure relief valve 201 can be covered and shielded by the box body 2 to prevent the pressure relief valve 201 from being exposed, reduce the risk of damage to the pressure relief valve 201, and extend the service life of the pressure relief valve 201. At the same time, the protection box assembly 100 needs to cooperate with the fixing member 3 through the unlocking member to lock or unlock the box body 2 and the mounting plate 1, that is, a special tool is required to open it, which can further improve the safety of the protection box assembly 100.

[0067] In some embodiments, the assembly and fixing method of the mounting plate 1 and the oil tank is not specifically limited herein. For example, the mounting plate 1 is fixed to the oil tank by welding, the mounting plate 1 is fixed to the oil tank by screwing, etc.

[0068] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0069] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0070] In the description of the present invention, the meaning of "a plurality of" is two or more.

[0071] In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0072] In the description of the present invention, the first feature being "above", "above" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher horizontal height than the second feature.

[0073] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0074] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A protective box assembly, characterized in that: The protection box assembly is used to protect the valve assembly, and the protection box assembly includes: A mounting plate (1), the valve assembly being mounted on the mounting plate (1), and the mounting plate (1) being in a preset position; A box body (2), the box body (2) is rotatably connected to the mounting plate (1), and the box body (2) forms a cavity with an open end, the open end of the box body (2) can abut against the mounting plate (1) and cover the valve assembly in the cavity.

2. The protection box assembly according to claim 1, characterized in that: It also comprises a fixing member (3), wherein the fixing member (3) is used to lock and fix the box body (2) and the mounting plate (1).

3. The protection box assembly according to claim 2, characterized in that: The mounting plate (1) is provided with a connecting portion, the connecting portion is located inside the cavity and is arranged opposite to the wall surface of the box body (2), and the connecting portion is used to be connected to the fixing member (3); The box body (2) is provided with a mounting hole arranged opposite to the connecting portion, and the mounting hole is used for allowing the fixing member (3) to pass through.

4. The protection box assembly according to claim 3, characterized in that: A connecting plate (12) is provided on the mounting plate (1), at least a portion of the connecting plate (12) is opposite to and spaced from a wall surface of the box body (2) provided with the mounting hole, and the connecting portion is formed on the connecting plate (12).

5. The protection box assembly according to claim 3, characterized in that: The connecting portion is configured as a threaded hole, and the fixing member (3) comprises: A rod portion (31), wherein the rod portion (31) is provided with a threaded section, and the threaded section can be passed through the box body (2) and is used for threaded connection with the threaded hole; A head portion (32), the head portion (32) being connected to one end of the rod portion (31) and being arranged on the outside of the box body (2).

6. The protection box assembly according to claim 5, characterized in that: The outer wall of the box body (2) is provided with a fixing sleeve (23), which extends from the outer wall of the box body (2) to a side away from the box body (2) and is used to cover the fixing member (3).

7. The protection box assembly according to claim 5, characterized in that: The head (32) is provided with a driving groove, and the protection box assembly further comprises an unlocking member, which is adapted to the shape of the driving groove and is used to drive the head (32) to rotate so as to lock or unlock the fixing member (3) and the connecting part.

8. The protection box assembly according to claim 3, characterized in that: The box body (2) comprises: A top wall and a bottom wall (22), the top wall and the bottom wall (22) are opposite to each other in the vertical direction and are spaced apart; a side wall (21), the side wall (21) being connected between the top wall and the bottom wall (22) and defining an opening with the top wall and the bottom wall (22), and the side of the side wall (21) adjacent to the opening being pivotally connected to the mounting plate (1); Wherein, the mounting hole is formed on the side wall (21).

9. The protection box assembly according to claim 8, characterized in that: Also includes: A first hinge part (41), wherein the first hinge part (41) is arranged on the box body (2); A second hinged portion (42), wherein the second hinged portion (42) is arranged on the mounting plate (1), and the first hinged portion (41) is hingedly matched with the second hinged portion (42), and the box body (2) can rotate around a rotation axis relative to the mounting plate (1).

10. A transformer (200), characterized in that: The invention comprises a protection box assembly according to any one of claims 1-9.

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