Convenient-to-transport electric energy metering box

Abstract

The invention relates to a portable electric energy metering box, and relates to the technical field of power supply and management, the portable electric energy metering box comprises a box body and a box door rotatably connected to the edge of the front side of the box body, a fixing plate is fixedly arranged on the edge, close to the back side, of the bottom surface of the box body in the vertical direction, and an extension plate is rotatably connected to the bottom surface of the fixing plate; a placement plate located on the bottom side of the box body is rotationally connected to the lower portion of the front side face of the extension plate, a supporting plate is vertically arranged on the side face, close to the extension plate, of the placement plate, and a fixing piece is installed on the front side of the box body. According to the invention, the extension plate and the placement plate can rotate to a fitting vertical state first and then rotate together to be flush with the bottom surface of the box body, so that the overall size of the electric energy metering box is greatly reduced, the loading space of a transport vehicle is effectively saved, the number of single-time transportation is increased, and the transportation cost is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power supply and management, and in particular to a convenient-to-transport electric energy metering box. BACKGROUND

[0002] At present, the electric energy metering box is widely used in residential areas, industrial parks and public facilities and the like as a core device for measuring and protecting electric energy in a power system. The core function of the electric energy metering box is to realize accurate measurement of power consumption, circuit overload protection and remote meter reading control through built-in electric components such as electric meters and circuit breakers. With the upgrading of smart grids, the deployment density of electric energy metering boxes continues to increase, and higher requirements are put forward for the transportation efficiency and on-site maintenance convenience of the equipment. However, the traditional design mainly focuses on function integration and ignores the coordinated optimization of transportation and maintenance scenarios, resulting in efficiency bottlenecks in the whole life cycle management of the equipment. Therefore, it is urgent to solve the contradiction between transportation and use through structural innovation.

[0003] In the related art, an electric energy metering box includes a box body and a box door rotatably connected to the front side edge of the box body, wherein a plurality of electric components (electric meters and circuit breakers) are fixedly installed in the box body. An extension plate is fixedly installed on the bottom side of the box body in the vertical direction, and a placement plate is integrally formed on the side of the extension plate away from the bottom side of the box body in the horizontal direction. When a worker performs maintenance on the electric energy metering box, the commonly used tools can be placed on the placement plate, and there is no need to find a place to place the tools, so that the maintenance work can be carried out more conveniently and efficiently.

[0004] In the above related art, since the loading space of the transport vehicle is limited, the extension plate and the integrally formed placement plate fixedly arranged on the bottom side of the box body of the electric energy metering box invisibly increase the volume of the entire electric energy metering box. This structural design causes the electric energy metering box to occupy too much space of the transport vehicle during transportation, directly resulting in a significant reduction in the number of electric energy metering boxes that can be loaded on the same transport vehicle, which not only reduces the transportation efficiency but also increases the transportation cost, and there is room for improvement. SUMMARY

[0005] The purpose of the present application is to provide a convenient-to-transport electric energy metering box to solve the problem of the large overall volume of the electric energy metering box caused by the extension plate and the placement plate in the above related art.

[0006] The convenient-to-transport electric energy metering box provided by the present application adopts the following technical solution: The utility model provides a kind of convenient transport type electric energy metering box, including box, the door of rotation connection on the front side edge of box, the bottom surface of the box is fixed with fixed plate on the edge of back side along vertical direction, the bottom surface of the fixed plate is rotationally connected with extension plate, the lower part of the front side of the extension plate is rotationally connected with the placement plate on the bottom side of the box, the side of the placement plate is vertically provided with support plate on the side of extension plate, and the front side of the box is provided with fixing part;The extension plate is in vertical downward state after being installed in the box, the placement plate can be folded to vertical state and fixed when being upward, and downward to horizontal maintenance state, the support plate is below the placement plate and abuts with the front side of extension plate when the placement plate is in horizontal maintenance state;The placement plate is first rotated to the vertical state that is attached to the front side of extension plate during transportation, and then the extension plate and the placement plate are rotated to the state that is flush with the bottom surface of the box, and the fixing part can be detachably connected with the support plate at this time.

[0007] By adopting the above technical scheme, during transportation, the extension plate and the placement plate can be first rotated to the attached vertical state, and then rotated together to the state that is flush with the bottom surface of the box, which greatly reduces the overall volume of the electric energy metering box, effectively saves the loading space of the transport vehicle, improves the number of single transportation, and reduces the transportation cost. This innovative structural design cleverly meets the needs of transportation and maintenance scenarios, effectively solves the contradiction of traditional design in these two links, and improves the efficiency of equipment life cycle management.

[0008] Optionally, the fixing part is a sliding plate that can slide up and down on the front side of the box, the box is provided with a limiting part that limits the sliding state of the sliding plate, the bottom surface of the sliding plate is fixed with a limiting plate in the vertical direction, and two limiting rods are fixed in the vertical direction on the bottom surface of the limiting plate; The support plate is in vertical upward state when the metering box is in transportation state, a fixing groove is formed in the top surface of the support plate at this time, and the limiting rods can be inserted into the fixing groove when the sliding plate slides downward.

[0009] By adopting the above technical scheme, when entering the transportation state, the worker only needs to slide the sliding plate downward, and the limiting plate descends, and the two limiting rods on the bottom surface thereof can be accurately inserted into the fixing groove of the support plate, to realize the stable connection of the extension plate and the placement plate with the box, and avoid equipment damage due to shaking and bumping during transportation. Moreover, this detachable connection mode can quickly slide the sliding plate upward after arriving at the maintenance site, to release the fixation of the extension plate and the placement plate, facilitate the expansion and maintenance operation of the placement plate, and balance the stability of transportation and the convenience of maintenance, to improve the overall efficiency of equipment use.

[0010] Optionally, the limiting member is a dovetail sliding rail fixed relative to the left and right side edges of the box in the vertical direction, both ends of the sliding plate are fixed with a bending plate on the left and right sides of the box, and the bending plate is provided with a dovetail sliding groove in sliding cooperation with the dovetail sliding rail; the upper and lower ends of the dovetail sliding rail are fixed with anti-disengagement screws.

[0011] By adopting the above technical scheme, the sliding plate can smoothly slide along the established vertical direction, avoiding jamming and deviation during sliding, and the connection strength and stability between the sliding plate and the box are greatly enhanced, effectively preventing the sliding plate from shaking or falling off under stress; at the same time, the anti-disengagement screws arranged at the upper and lower ends of the dovetail sliding rail limit the sliding stroke of the sliding plate, and when the sliding plate slides to the limit position, the anti-disengagement screws can timely prevent it from continuing to slide, thereby effectively avoiding the situation that the sliding plate falls off the dovetail sliding rail due to excessive sliding.

[0012] Optionally, the support plate is provided with a support groove on the top surface thereof when the placement plate is in the vertical folded state, and the limiting plate is provided with a limiting notch on the side surface thereof facing the box; a plurality of protective columns are arranged side by side below the box, and the side surfaces of adjacent protective columns close to each other are detachably connected; one end of the plurality of protective columns is clamped into the support groove when the placement plate is in the vertical folded state, and the other end can be clamped into the limiting notch and flush with the bottom surface of the box when the sliding plate slides downward.

[0013] By adopting the above technical scheme, the support groove provided on the top surface of the support plate provides a precise clamping position for the protective column, which can provide additional support and fixation for the placement plate when one end of the protective column is clamped therein, preventing accidental shaking or displacement of the placement plate in the non-use state and enhancing the stability of the structure; at the same time, the limiting notch provided on the side surface of the limiting plate can cooperate with the other end of the protective column when the sliding plate slides downward, so that the protective column is further stabilized, and the end of the protective column is flush with the bottom surface of the box, which not only ensures the compactness of the overall structure, but also does not affect the normal placement and use of the metering box.

[0014] Optionally, the inner wall of the limiting notch is a guide inclined surface.

[0015] By adopting the above technical scheme, when the sliding plate slides downward and the protective column gradually approaches the limiting notch, the guide inclined surface can play a key guiding role; it can convert the contact between the protective column and the limiting notch from a harsh direct collision to a smooth guided contact, so that the protective column is more easily and accurately clamped into the limiting notch, greatly reducing the installation difficulty and improving the operation efficiency.

[0016] Optionally, the placing plate is provided with a fixing through hole, the extension plate is provided with a fixing screw hole, the fixing through hole coincides with the fixing screw hole when the placing plate is in the vertical folding state, and the box body is provided below the fixing through hole and is provided with a fixing bolt which is screwed into the fixing screw hole after penetrating through the fixing through hole.

[0017] By adopting the above technical scheme, the fixing through hole on the placing plate and the fixing screw hole on the extension plate are accurately coincided after the placing plate is folded in place, at this time, the fixing bolt is penetrated through the fixing through hole and screwed into the fixing screw hole, so that the placing plate and the extension plate are tightly connected into a whole.

[0018] Optionally, the fixing bolt is a butterfly bolt.

[0019] By adopting the above technical scheme, the unique butterfly head design of the butterfly bolt does not need to rely on additional tools, and the staff can easily screw it by hand.

[0020] Optionally, the side surface of the adjacent protection column which is close to each other is provided with a let-in sunken groove, the protection net is arranged between the adjacent protection columns, and opposite side surfaces of the protection net are fixedly connected with inner walls of the let-in sunken grooves which are close to each other; the protection columns can be detached from below the box body after moving on the sliding plate, the adjacent protection columns can be split in the direction away from each other to expand the protection net, and the protection columns are placed on the ground in the vertical direction to protect the maintenance area.

[0021] By adopting the above technical scheme, in the normal state, the protection column is installed below the box body, the protection net is stably connected between the adjacent protection columns through the let-in sunken groove, the bottom of the box body is protected, and external sundries are prevented from entering to affect the equipment operation, and the compact structure does not occupy additional space. When entering the maintenance link, the protection column can be detached after moving on the sliding plate, the adjacent protection columns can be split to expand the protection net, at this time, the protection column is placed vertically on the ground, and the protection net is expanded to form a maintenance area protection barrier.

[0022] Optionally, a plurality of magnetic suction blocks are embedded on the side surface of the adjacent protection column which is close to each other; and the two magnetic suction blocks abut against each other and are attracted to each other when the adjacent protection columns abut against each other.

[0023] By adopting the above technical scheme, when the protection column is in the state of being normally installed below the box body or being closely connected during transportation, the magnetic suction blocks embedded on the side surfaces of the adjacent protection columns which are close to each other will abut against each other and generate mutual attraction magnetic force when the two abut against each other; the magnetic suction effect can closely connect the adjacent protection columns, effectively avoid the loosening and separation between the protection columns due to slight shaking, vibration or external force touching, and greatly improve the stability of the overall structure.

[0024] Optionally, the placement plate has a gap with the bottom surface of the metering box in the transportation state of the metering box; the protective columns are removed from below the metering box when the metering box is adjusted to the transportation state, and then are adjusted to the horizontal state and placed in the gap.

[0025] By adopting the above technical scheme, in the transportation state of the metering box, the placement plate leaves a gap with the bottom surface of the metering box, thereby providing a reasonable storage space for the protective columns; the removed protective columns are adjusted to the horizontal state and placed in the gap, thereby avoiding loss or damage of the protective columns in the transportation due to no place for placement, fully utilizing the idle space of the metering box itself, without occupying the storage area of the transportation carrier, and improving the space utilization of transportation.

[0026] In summary, the present application has at least one of the following beneficial technical effects: 1. In the transportation link, the extension plate and the placement plate can be first rotated to the vertical state of adhesion, and then are collectively rotated to be flush with the bottom surface of the metering box, thereby greatly reducing the overall volume of the electric energy metering box, effectively saving the loading space of the transportation vehicle, improving the number of single transportation, and reducing the transportation cost; the innovative structural design ingeniously takes into account the needs of transportation and maintenance scenes, effectively solves the contradiction of the traditional design in the two links, and improves the efficiency of the whole life cycle management of the equipment; 2. In the normal state, the protective columns are installed below the metering box, and the protective net is stably connected between adjacent protective columns by means of the gap sink, thereby forming protection for the bottom of the metering box, preventing foreign matters from entering to affect the operation of the equipment, and at the same time, the compact structure does not occupy additional space. When entering the maintenance link, the protective columns can be removed after the sliding plate is moved upward, and the adjacent protective columns can be split and expanded to the protective net, at this time, the protective columns are vertically placed on the ground, and the protective net is expanded to form a maintenance area protection barrier. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating any creative labor.

[0028] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application embodying the installation and cooperation of the metering box and the fixed plate; Figure 2 is a schematic diagram of the overall structure of the embodiment of the present application embodying the installation and cooperation of the fixed plate and the extension plate; Figure 3 is a schematic diagram of the overall structure of the embodiment of the present application embodying the installation and cooperation of the placement plate and the support plate; Figure 4is a sectional view structure schematic diagram of the installation and cooperation of the sliding plate and the limiting plate according to the embodiment of the present application; Figure 5 is a sectional view structure schematic diagram of the installation and cooperation of the sliding plate and the bending plate according to the embodiment of the present application; Figure 6 is a sectional view structure schematic diagram of the installation and cooperation of the placing plate and the extension plate according to the embodiment of the present application; Figure 7 is a sectional view structure schematic diagram of the installation and cooperation of the limiting plate and the protective column according to the embodiment of the present application; Figure 8 is a sectional view structure schematic diagram of the installation and cooperation of the fixing bolt and the placing plate according to the embodiment of the present application; Figure 9 is a sectional view structure schematic diagram of the installation and cooperation of the protective column and the protective net according to the embodiment of the present application; Figure 10 is a partial enlarged schematic diagram of the installation and cooperation of the protective column and the box according to the embodiment of the present application.

[0029] In the figure, 1, box; 11, box door; 12, fixing bolt; 121, butterfly bolt; 2, fixed plate; 3, extension plate; 31, fixing screw hole; 4, placing plate; 41, fixed through hole; 5, support plate; 51, support groove; 52, fixed groove; 6, fixing piece; 61, sliding plate; 611, limiting plate; 6111, limiting notch; 6112, guide inclined surface; 612, limiting rod; 613, bending plate; 6131, dovetail sliding groove; 7, limiting piece; 71, dovetail sliding rail; 711, anti-loose screw; 8, protective column; 81, accommodation groove; 82, magnetic block; 9, protective net. DETAILED DESCRIPTION

[0030] The present application is further described in detail below with reference to all the drawings.

[0031] Embodiment: With reference to Figure 1 , Figure 2 and Figure 3 , a convenient transportation type electric energy metering box comprises a box 1, a box door 11 rotatably connected to the front side edge of the box 1; a fixed plate 2 is integrally formed on the bottom surface of the box 1 near the edge of the back side in the vertical direction, wherein the bottom surface of the fixed plate 2 is rotatably connected with an extension plate 3, and the lower part of the front side surface of the extension plate 3 is rotatably connected with a placing plate 4 located at the bottom side of the box 1; a support plate 5 is vertically installed on the side surface of the placing plate 4 close to the extension plate 3, and a fixing piece 6 is installed on the front side of the box 1; When the electric energy metering box is completed, the extension plate 3 is in a vertical downward state; at this time, the placing plate 4 can be turned up to a vertical folded state and fixed, and turned down to a horizontal maintenance state; when the placing plate 4 is in the horizontal maintenance state, the supporting plate 5 is just below the placing plate 4 and tightly abuts the front side of the extension plate 3, providing stable support for the placing plate 4; During the transportation of the metering box, the staff can first turn the placing plate 4 to the vertical state of abutting the front side of the extension plate 3, and then turn the extension plate 3 and the placing plate 4 together to the position flush with the bottom surface of the box body 1; at this time, the fixing part 6 can be detachably connected with the supporting plate 5, thereby ensuring that the extension plate 3 and the placing plate 4 are stable and do not shake during transportation, facilitating transportation.

[0032] Referring to Figure 2 and Figure 4 , the fixing part 6 is a sliding plate 61 slidably arranged on the front side of the box body 1 and capable of sliding up and down, the box body 1 is provided with a limiting part 7 limiting the sliding state of the sliding plate 61, the bottom surface of the sliding plate 61 is fixed with a limiting plate 611 in the vertical direction, and the bottom surface of the limiting plate 611 is fixed with two limiting rods 612 in the vertical direction and side by side; When the metering box is in the transportation state, the supporting plate 5 is in a vertical upward state; at this time, the top surface of the supporting plate 5 is provided with a fixed groove 52; when it is necessary to fix the extension plate 3 and the placing plate 4 for convenient transportation, the staff can slide the sliding plate 61 downward and drive the limiting rods 612 to move downward until the limiting rods 612 are accurately inserted into the fixed groove 52 on the top surface of the supporting plate 5, thereby realizing the stable fixation of the extension plate 3 and the placing plate 4 during transportation.

[0033] Referring to Figure 5 , the limiting part 7 is a dovetail sliding rail 71 fixedly installed on the left and right side edges of the box body 1 in the vertical direction, the two ends of the sliding plate 61 are integrally formed with a bending plate 613 on the left and right sides of the box body 1, and the bending plate 613 is provided with a dovetail sliding groove 6131 slidingly matched with the dovetail sliding rail 71; the upper and lower ends of the dovetail sliding rail 71 are fixedly installed with anti-coming-off screws 711; Through the sliding cooperation of the dovetail sliding groove 6131 and the dovetail sliding rail 71, the sliding plate 61 can slide in the predetermined vertical direction, and at the same time, the connection stability between the sliding plate 61 and the box body 1 is enhanced; the anti-coming-off screws 711 play a blocking role, limiting the sliding stroke of the sliding plate 61, and effectively avoiding the falling caused by excessive sliding.

[0034] Referring to Figure 6 and Figure 7The support plate 5 has a support groove 51 on its top surface when the placement plate 4 is in a vertically folded state. The limiting plate 611 has a limiting notch 6111 on its side facing the box 1. The inner wall of the limiting notch 6111 is a guide slope 6112. Three protective columns 8 are arranged side by side below the box 1, and the sides of adjacent protective columns 8 that are close to each other can be detachably connected. When the placement plate 4 is in a vertically folded state, one end of the protective column 8 can be inserted into the support groove 51 of the support plate 5; and when the sliding plate 61 slides down, the other end of the protective column 8 can be inserted into the limiting notch 6111 of the limiting plate 611 along the guide slope 6112. At this time, the end of the protective column 8 is flush with the bottom surface of the box 1, which ensures the stability of the overall structure and does not affect the normal placement and use of the metering box.

[0035] Reference Figure 8 The placement plate 4 has a fixing through hole 41, and the extension plate 3 has a fixing screw hole 31. The fixing through hole 41 coincides with the fixing screw hole 31 when the placement plate 4 is in the vertically folded state. The box body 1 (see Figure 1 Below, a fixing bolt 12 is provided that passes through the fixing through hole 41 and is screwed into the fixing screw hole 31, and the fixing bolt 12 is a wing bolt 121; The fixing bolt 12 is designed as a wing bolt 121. The operator does not need to use any additional tools. He can simply rotate the wing bolt 121 manually to make it pass through the fixing through hole 41 and screw it into the fixing screw hole 31, thereby firmly fixing the placement plate 4 and the extension plate 3 together.

[0036] Reference Figure 9 Each of the adjacent protective posts 8 has a clearance groove 81 on its side that is close to each other, and a protective net 9 is provided between the adjacent protective posts 8. The two opposite sides of the protective net 9 are fixedly connected to the inner wall of the clearance groove 81 that is close to each other. When the metering box needs maintenance, the operator can slide the plate 61 (see...) Figure 3 The three protective posts 8 are moved upwards, causing them to lose their limiting constraints, thus allowing them to move out of the box 1 (see...). Figure 3 Remove the lower part; then, separate the adjacent protective posts 8 in a direction away from each other, at which point the protective net 9 originally stored in the relief trough 81 will unfold; finally, place the three protective posts 8 vertically on the ground, and the unfolded protective net 9 will form a protective area, which can isolate and protect the maintenance area.

[0037] Reference Figure 9 Several magnetic blocks 82 are embedded on the sides of adjacent protective posts 8 that are close to each other; when the protective posts 8 need to be stored, the staff can assemble the three protective posts 8 and the adjacent protective posts 8 are tightly attached by the magnetic blocks 82.

[0038] ReferenceFigure 10 When the metering box is in transport state, there is a clearance between the placement plate 4 and the bottom surface of the box body 1. When the metering box is transported, the staff can remove the three protective posts 8 from under the box body 1, then adjust them to a horizontal state and place them in the clearance, so that the metering box is more compact in structure during transportation and occupies less space.

[0039] The implementation principle of this application embodiment is as follows: In the transportation state, the staff can first rotate the placement plate 4 to a vertical position that fits against the extension plate 3, and then make both of them flush with the bottom surface of the box 1. At this time, the sliding plate 61 slides down to allow the limiting rod 612 to be inserted into the fixing groove to complete the fixation. The protective column 8 can also be removed and placed horizontally in the clearance gap between the placement plate 4 and the bottom surface of the box 1 to save transportation space. In the maintenance state, the staff can rotate the placement plate 4 to a horizontal position. At this time, maintenance tools can be placed on the placement plate 4, and the sliding plate 61 can be moved up to remove the protective column 8. The adjacent protective columns 8 can be separated to allow the protective net 9 to unfold and form a protective area to prevent unauthorized personnel from approaching. When the placement plate 4 is in a vertically folded state, one end of each of the three protective columns 8 can be inserted into the support groove 51. At this time, the sliding plate 61 slides down to allow the other end of the three protective columns 8 to be inserted into the limiting plate 611 limiting notch 6111. At the same time, the placement plate 4 and the extension plate 3 can be fixed with the butterfly fixing bolt 12.

[0040] Unless otherwise defined, the terms or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "a" or "one," and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," and similar words mean that the element or object preceding "comprising" encompasses the element or object listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0041] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A portable electricity metering box, comprising a box body (1) and a door (11) rotatably connected to the front edge of the box body (1), characterized in that, A fixing plate (2) is fixedly provided on the bottom surface of the box (1) near the back side edge in the vertical direction. An extension plate (3) is rotatably connected to the bottom surface of the fixing plate (2). A placement plate (4) located on the bottom side of the box (1) is rotatably connected to the lower part of the front side of the extension plate (3). A support plate (5) is provided on the side of the placement plate (4) near the extension plate (3). A fixing piece (6) is installed on the front side of the box (1). After the box (1) is installed, the extension plate (3) is in a vertically downward state. The placement plate (4) can rotate upward to a vertically folded state and be fixed, and rotate downward to a horizontal maintenance state. The support plate (5) is located below the placement plate (4) and abuts against the front side of the extension plate (3) when the placement plate (4) is in a horizontal maintenance state. When the metering box is transported, the placement plate (4) is first rotated to a vertical state that is in contact with the front side of the extension plate (3), and then the extension plate (3) and the placement plate (4) are rotated together to a state that is flush with the bottom surface of the box body (1). The fixing member (6) can be detachably connected to the support plate (5) at this time.

2. The portable power metering box according to claim 1, characterized in that, The fixing member (6) is a sliding plate (61) that is slidably mounted on the front side of the box (1) and can slide up and down. The box (1) is provided with a limiting member (7) that limits the sliding state of the sliding plate (61). A limiting plate (611) is fixedly mounted on the bottom surface of the sliding plate (61) in the vertical direction. Two limiting rods (612) are fixedly mounted side by side on the bottom surface of the limiting plate (611) in the vertical direction. When the metering box is in the transport state, the support plate (5) is in a vertically upward state. At this time, a fixed groove (52) is provided on the top surface of the support plate (5). When the limiting rod (612) slides down with the sliding plate (61), it can be inserted into the fixed groove (52).

3. A portable power metering box according to claim 2, characterized in that, The limiting component (7) is a dovetail slide rail (71) fixedly mounted on the left and right sides of the box body (1) in a vertical direction. Both ends of the sliding plate (61) are fixedly provided with bent plates (613) located on the left and right sides of the box body (1). The bent plates (613) are provided with dovetail grooves (6131) that slide with the dovetail slide rail (71). The upper and lower ends of the dovetail slide rail (71) are fixedly provided with anti-loosening screws (711).

4. A portable power metering box according to claim 2, characterized in that, The support plate (5) has a support groove (51) on its top surface when the placement plate (4) is in a vertically folded state, and the limiting plate (611) has a limiting notch (6111) on its side facing the box (1). Several protective posts (8) are arranged side by side below the box (1), and the sides of adjacent protective posts (8) that are close to each other can be detachably connected; one end of the protective posts (8) is inserted into the support groove (51) when the placement plate (4) is in a vertically folded state, and the other end can be inserted into the limiting notch (6111) and flush with the bottom surface of the box (1) when the sliding plate (61) slides down.

5. A portable power metering box according to claim 4, characterized in that, The inner wall of the limiting notch (6111) is a guide slope (6112).

6. A portable power metering box according to claim 4, characterized in that, The placement plate (4) has a fixing through hole (41), and the extension plate (3) has a fixing screw hole (31). The fixing through hole (41) coincides with the fixing screw hole (31) when the placement plate (4) is in a vertically folded state. The box body (1) has a fixing bolt (12) that passes through the fixing through hole (41) and is screwed into the fixing screw hole (31) at the bottom.

7. A portable power metering box according to claim 6, characterized in that, The fixing bolt (12) is a wing bolt (121).

8. A portable power metering box according to claim 4, characterized in that, Each of the adjacent protective posts (8) has a clearance groove (81) on its side that is close to each other. A protective net (9) is provided between the adjacent protective posts (8). The two opposite sides of the protective net (9) are fixedly connected to the inner wall of the clearance groove (81) that is close to each other. After the protective posts (8) move up the sliding plate (61), they can be removed from below the box (1). The adjacent protective posts (8) can then be split apart in a direction away from each other to unfold the protective net (9). The protective posts (8) are then placed on the ground in a vertical direction to protect the maintenance area.

9. A portable power metering box according to claim 4, characterized in that, Several magnetic blocks (82) are embedded on the sides of adjacent protective columns (8) that are close to each other; when the two magnetic blocks (82) are in contact with each other, they abut against each other and attract each other.

10. A portable power metering box according to claim 4, characterized in that, When the metering box is in the transport state, there is a clearance between the placement plate (4) and the bottom surface of the box (1); several protective posts (8) are removed from below the box (1) when the metering box is adjusted to the transport state, and then adjusted to a horizontal state and placed in the clearance.

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