Portable electric energy metering box

Abstract

The application relates to a convenient transportation type electric energy metering box and relates to the technical field of power supply and management, which comprises a box body, a box door rotationally connected to the front side edge of the box body, a fixed plate fixed in the vertical direction on the bottom surface of the box body near the edge of the back side, an extension plate rotationally connected to the bottom surface of the fixed plate, a placing plate rotationally connected to the bottom side of the box body on the lower part of the front side surface of the extension plate, a supporting plate vertically arranged on the side surface of the placing plate close to the extension plate, and a fixing piece arranged on the front side of the box body; the extension plate and the placing plate can be first rotated to the vertical state of close contact, and then are jointly rotated to be flush with the bottom surface of the box body, so that the overall volume of the electric energy metering box is greatly reduced, the loading space of a transport vehicle is effectively saved, the single transportation quantity is improved, and the transportation cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of power supply and management, and in particular to a portable power metering box. Background Technology

[0002] Currently, electricity metering boxes, as core equipment for metering and protecting electrical energy in power systems, are widely used in residential communities, industrial parks, and public facilities. Their core function is to achieve accurate electricity consumption measurement, circuit overload protection, and remote meter reading control through built-in electrical components such as meters and circuit breakers. With the intelligent upgrading of the power grid, the deployment density of electricity metering boxes continues to increase, placing higher demands on the transportation efficiency and on-site maintenance convenience of the equipment. However, traditional designs often focus on functional integration, neglecting the collaborative optimization of transportation and maintenance scenarios, resulting in efficiency bottlenecks in the full life cycle management of the equipment. It is urgent to solve the contradiction between transportation and use through structural innovation.

[0003] In related technologies, an electricity metering box includes a box body and a door rotatably connected to the front edge of the box body. Several electrical components (electricity meters, circuit breakers) are fixedly installed inside the box body. An extension plate is fixedly installed vertically on the bottom side of the box body, and a placement plate is integrally formed horizontally on the side of the extension plate away from the bottom side of the box body. When workers inspect the electricity metering box, they can place commonly used tools on the placement plate without having to search for additional places to put tools, thus enabling more convenient and efficient maintenance work.

[0004] In the aforementioned related technologies, since the loading space of the transport vehicle is already limited, the extension plate and the one-piece molded placement plate fixed on the bottom side of the electricity metering box will increase the volume of the entire electricity metering box. This structural design causes the electricity metering box to occupy too much space in the transport vehicle during transportation, directly resulting in a significant reduction in the number of electricity metering boxes that can be loaded on the same transport vehicle. This not only reduces transportation efficiency but also increases transportation costs, indicating room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a portable electricity metering box, which solves the problem that the extension plate and placement plate in the above-mentioned related technologies result in a large overall volume of the electricity metering box, making it inconvenient to transport.

[0006] The portable energy metering box provided in this application adopts the following technical solution:

[0007] A portable electricity metering box includes a box body and a door rotatably connected to the front edge of the box body. A fixing plate is vertically fixed on the bottom edge of the box body near the back side. 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 rotatably connected to the lower part of the front side of the extension plate. A support plate is vertically mounted on the side of the placement plate near the extension plate. A fixing member is installed on the front side of the box body. After the box body is installed, the extension plate is in a vertically downward position. The placement plate can be rotated upward to a vertically folded state and fixed, and rotated downward to a horizontal maintenance state. When the placement plate is in the horizontal maintenance state, the support plate is located below the placement plate and abuts against the front side of the extension plate. During the transportation of the metering box, the placement plate first rotates to a vertical state that is in contact with the front side of the extension plate, and then the extension plate and the placement plate rotate together to a state that is flush with the bottom surface of the box body. The fixing member can be detachably connected to the support plate at this time.

[0008] By adopting the above technical solution, in the transportation process, the extension plate and the placement plate can first be rotated to a vertically aligned position, and then rotate together to be flush with the bottom surface of the box. This greatly reduces the overall volume of the power metering box, effectively saves the loading space of the transport vehicle, increases the quantity transported in a single trip, and reduces transportation costs. This innovative structural design cleverly takes into account the needs of both transportation and maintenance scenarios, effectively solves the contradictions in these two aspects of traditional design, and improves the efficiency of equipment lifecycle management.

[0009] Optionally, the fixing component is a sliding plate that slides up and down on the front side of the box. The box is provided with a limiting component to limit the sliding state of the sliding plate. A limiting plate is fixed on the bottom surface of the sliding plate in the vertical direction. Two limiting rods are fixed side by side on the bottom surface of the limiting plate in the vertical direction. When the metering box is in the transportation state, the support plate is in a vertically upward state. At this time, a fixing groove is opened on the top surface of the support plate. The limiting rods can be inserted into the fixing groove when the sliding plate slides down.

[0010] By adopting the above technical solution, when entering the transportation state, the staff only needs to slide the sliding plate downwards, and the limiting plate will descend accordingly. The two limiting rods on its bottom surface can be accurately inserted into the fixing grooves of the support plate, realizing a stable connection between the extension plate and the placement plate and the box body, avoiding equipment damage caused by shaking and bumping during transportation. Moreover, this detachable connection method allows the sliding plate to be quickly slid down after arriving at the maintenance site, releasing the fixing of the extension plate and the placement plate, facilitating the unfolding of the placement plate for maintenance operations. It takes into account both the stability of transportation and the convenience of maintenance, improving the overall efficiency of equipment use.

[0011] Optionally, the limiting component is a dovetail slide rail fixedly mounted vertically on the left and right sides of the box body. Both ends of the sliding plate are fixedly provided with bent plates located on the left and right sides of the box body. The bent plates are provided with dovetail grooves that slide with the dovetail slide rail. Both the upper and lower ends of the dovetail slide rail are fixedly provided with anti-loosening screws.

[0012] By adopting the above technical solution, this structural design not only enables the sliding plate to slide smoothly and steadily along the predetermined vertical direction, avoiding jamming and deviation during the sliding process, but also greatly enhances the connection strength and stability between the sliding plate and the housing, effectively preventing the sliding plate from shaking or falling off when subjected to force. At the same time, the anti-loosening screws set at the upper and lower ends of the dovetail slide rail limit the sliding stroke of the sliding plate. When the sliding plate slides to the limit position, the anti-loosening screws can stop it from continuing to slide in time, thereby effectively preventing the sliding plate from falling off the dovetail slide rail due to excessive sliding.

[0013] Optionally, the support plate has a support groove on its top surface when the placement plate is in a vertically folded state, and the limiting plate has a limiting notch on its side facing the box body; several protective columns are arranged side by side below the box body, and the sides of adjacent protective columns that are close to each other can be detachably connected; one end of the several protective columns is inserted into the support groove when the placement plate is in a vertically folded state, and the other end can be inserted into the limiting notch and flush with the bottom surface of the box body when the sliding plate slides down.

[0014] By adopting the above technical solution, the support groove on the top surface of the support plate provides a precise locking position for the protective column. When one end of the protective column is locked in, it can provide additional support and fixation for the placement plate, preventing the placement plate from accidentally shaking or shifting when not in use, thus enhancing the stability of the structure. At the same time, the limiting notch on the side of the limiting plate can cooperate with the other end of the protective column when the sliding plate slides down, further stabilizing the protective column. Moreover, the end of the protective column is flush with the bottom surface of the box, which ensures the compactness of the overall structure and does not affect the normal placement and use of the metering box.

[0015] Optionally, the inner wall of the limiting notch is a guide slope.

[0016] By adopting the above technical solution, when the sliding plate slides down and the protective post gradually approaches the limiting notch, the guide slope can play a key guiding role; it can transform the contact between the protective post and the limiting notch from a hard direct collision to a smooth guiding contact, making the protective post easier and more accurate to be inserted into the limiting notch, greatly reducing the installation difficulty and improving the operation efficiency.

[0017] Optionally, the placement plate has a fixing through hole, and the extension plate has a fixing screw hole. The fixing through hole coincides with the fixing screw hole when the placement plate is in a vertically folded state. A fixing bolt is provided at the bottom of the box, which passes through the fixing through hole and is screwed into the fixing screw hole.

[0018] By adopting the above technical solution, the fixing through hole on the placement plate and the fixing screw hole on the extension plate are precisely aligned after the placement plate is folded into place. At this time, by using fixing bolts to pass through the fixing through hole and screw them into the fixing screw hole, the placement plate and the extension plate can be tightly connected into a whole.

[0019] Optionally, the fixing bolt is a wing bolt.

[0020] By adopting the above technical solution, the unique wing-shaped head design of the wing bolt allows workers to easily tighten it with just their hands without the need for additional tools.

[0021] Optionally, clearance grooves are provided on the sides of adjacent protective columns that are close to each other, and a protective net is provided between adjacent protective columns. The two opposite sides of the protective net are fixedly connected to the inner walls of the clearance grooves that are close to each other. After the protective columns are moved up on the sliding plate, they can be removed from the bottom of the box. At this time, the adjacent protective columns can be split in the direction away from each other to unfold the protective net. The protective columns are then placed on the ground in a vertical direction to protect the maintenance area.

[0022] By adopting the above technical solution, under normal conditions, the protective columns are installed below the enclosure, and the protective netting is securely connected between adjacent protective columns using a recessed channel, forming a protective barrier for the bottom of the enclosure and preventing external debris from entering and affecting equipment operation. Its compact structure does not occupy additional space. During maintenance, the protective columns can be removed after the sliding plate moves up, and the adjacent protective columns can be separated to unfold the protective netting. At this point, the protective columns are placed vertically on the ground, and the protective netting unfolds to form a protective barrier for the maintenance area.

[0023] Optionally, several magnetic blocks are embedded on the sides of adjacent protective posts that are close to each other; when two magnetic blocks are in contact with each other, they abut and attract each other.

[0024] By adopting the above technical solution, when the protective column is normally installed under the box or in a state that requires a tight connection, such as during transportation, the magnetic blocks embedded on the sides of adjacent protective columns will automatically abut and generate a magnetic force that attracts each other when the two are in contact. This magnetic attraction can keep the adjacent protective columns tightly connected, effectively preventing the protective columns from becoming loose or separating due to slight shaking, vibration or external force, and greatly improving the stability of the overall structure.

[0025] Optionally, the placement plate has a clearance gap with the bottom surface of the metering box when it is in the transport state; several protective posts are removed from the bottom of the box when the metering box is adjusted to the transport state, and then adjusted to a horizontal state and placed in the clearance gap.

[0026] By adopting the above technical solution, when the metering box is in the transportation state, a clearance is left between the placement plate and the bottom of the box, providing reasonable storage space for the protective column; after removal, the protective column is adjusted to a horizontal state and placed into the clearance, which not only avoids the loss or damage of the protective column due to lack of place during transportation, but also makes full use of the idle space of the metering box itself, without occupying the storage area of ​​the transport vehicle, thus improving the space utilization rate of transportation.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. During transportation, the extension plate and the placement plate can first be rotated to a vertically aligned position, and then rotated together to be flush with the bottom surface of the box. This greatly reduces the overall volume of the electricity metering box, effectively saves the loading space of the transport vehicle, increases the quantity transported per trip, and reduces transportation costs. This innovative structural design cleverly balances the needs of transportation and maintenance scenarios, effectively solves the contradictions in these two aspects of traditional design, and improves the efficiency of equipment lifecycle management.

[0029] 2. Under normal conditions, the protective posts are installed at the bottom of the enclosure, and the protective netting is securely connected between adjacent posts via recessed channels, forming a protective barrier for the bottom of the enclosure and preventing external debris from entering and affecting equipment operation. Its compact structure does not occupy additional space. During maintenance, the protective posts can be removed after the sliding plate moves up, and the protective netting on adjacent posts can be unfolded to both sides. At this point, the protective posts are placed vertically on the ground, and the protective netting unfolds to form a protective barrier for the maintenance area. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram illustrating the overall structure of the enclosure and the mounting plate in an embodiment of this application;

[0032] Figure 2 This is a schematic diagram illustrating the overall structure of the mounting and fitting of the fixed plate and the extension plate in an embodiment of this application;

[0033] Figure 3This is a schematic diagram illustrating the overall structure of the mounting plate and support plate in an embodiment of this application.

[0034] Figure 4 This is a cross-sectional structural diagram illustrating the installation and cooperation of the sliding plate and the limiting plate in an embodiment of this application;

[0035] Figure 5 This is a cross-sectional structural diagram illustrating the installation and cooperation of the sliding plate and the bending plate in an embodiment of this application;

[0036] Figure 6 This is a cross-sectional structural diagram illustrating the installation and cooperation of the placement plate and the extension plate in an embodiment of this application;

[0037] Figure 7 This is a cross-sectional structural diagram illustrating the installation and cooperation of the limiting plate and the protective post in an embodiment of this application;

[0038] Figure 8 This is a cross-sectional structural diagram illustrating the installation and assembly of the fixing bolts and the placement plate in an embodiment of this application;

[0039] Figure 9 This is a cross-sectional structural diagram illustrating the installation and coordination of the protective posts and protective nets in an embodiment of this application;

[0040] Figure 10 This is a partially enlarged schematic diagram illustrating the installation and cooperation of the protective column and the box body in an embodiment of this application.

[0041] In the diagram: 1. Box body; 11. Box door; 12. Fixing bolt; 121. Wing bolt; 2. Fixing plate; 3. Extension plate; 31. Fixing screw hole; 4. Placement plate; 41. Fixing through hole; 5. Support plate; 51. Support groove; 52. Fixing groove; 6. Fixing component; 61. Sliding plate; 611. Limiting plate; 6111. Limiting notch; 6112. Guide slope; 612. Limiting rod; 613. Bending plate; 6131. ​​Dovetail slide; 7. Limiting component; 71. Dovetail slide rail; 711. Anti-loosening screw; 8. Protective post; 81. Clearance groove; 82. Magnetic block; 9. Protective net. Detailed Implementation

[0042] The present application will be further described in detail below with reference to all the accompanying drawings.

[0043] Example:

[0044] Reference Figure 1 , Figure 2 and Figure 3A portable electricity metering box includes a box body 1 and a door 11 rotatably connected to the front edge of the box body 1; a fixing plate 2 is integrally formed on the bottom edge of the box body 1 near the back side in the vertical direction, wherein an extension plate 3 is rotatably connected to the bottom surface of the fixing plate 2, and a placement plate 4 located on the bottom side of the box body 1 is rotatably connected to the lower part of the front side of the extension plate 3; a support plate 5 is vertically installed on the side of the placement plate 4 near the extension plate 3, and a fixing member 6 is installed on the front side of the box body 1.

[0045] After the electricity metering box is installed, the extension plate 3 is in a vertical downward position. At this time, the placement plate 4 can be rotated upward to a vertical folded state and fixed, and rotated downward to a horizontal maintenance state. When the placement plate 4 is in a horizontal maintenance state, the support plate 5 is located just below the placement plate 4 and is in close contact with the front side of the extension plate 3, providing stable support for the placement plate 4.

[0046] During the transportation of the metering box, the staff can first rotate the placement plate 4 to a vertical position that is in contact with the front side of the extension plate 3. Then, let the extension plate 3 and the placement plate 4 rotate together to a position that is flush with the bottom surface of the box body 1. At this time, the fastener 6 can be detachably connected to the support plate 5, thereby ensuring that the extension plate 3 and the placement plate 4 are stable and do not shake during transportation, which is convenient for transportation.

[0047] Reference Figure 2 and Figure 4 The fixing part 6 is a sliding plate 61 that is slidably disposed on the front side of the box 1 and can slide up and down. The box 1 is provided with a limiting part 7 that limits the sliding state of the sliding plate 61. A limiting plate 611 is fixedly disposed on the bottom surface of the sliding plate 61 along the vertical direction. Two limiting rods 612 are fixedly installed side by side on the bottom surface of the limiting plate 611 along the vertical direction.

[0048] When the metering box is in transport, the support plate 5 is vertically upward. At this time, a fixing groove 52 is opened on the top surface of the support plate 5. When it is necessary to fix the extension plate 3 and the placement plate 4 for convenient transport, the operator can slide the sliding plate 61 downward and drive the limiting rod 612 downward until the limiting rod 612 is accurately inserted into the fixing groove 52 on the top surface of the support plate 5, thereby realizing the stable fixation of the extension plate 3 and the placement plate 4 during the transport process.

[0049] Reference Figure 5 The limiting component 7 is a dovetail slide rail 71 that is fixedly installed on the left and right sides of the box 1 in a vertical direction. Both ends of the sliding plate 61 are integrally formed with bent plates 613 located on the left and right sides of the box 1, and the bent plates 613 are provided with dovetail grooves 6131 that slide with the dovetail slide rail 71. Anti-loosening screws 711 are fixedly installed at both the upper and lower ends of the dovetail slide rail 71.

[0050] Through the sliding engagement of the dovetail groove 6131 and the dovetail slide rail 71, the sliding plate 61 can slide along a predetermined vertical direction. At the same time, this engagement method also enhances the connection stability between the sliding plate 61 and the housing 1. The anti-loosening screw 711 plays a blocking role, limiting the sliding stroke of the sliding plate 61 and effectively preventing it from falling off due to excessive sliding.

[0051] Reference Figure 6 and Figure 7 The 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.

[0052] 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.

[0053] 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;

[0054] 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.

[0055] 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.

[0056] When the metering box needs maintenance, the staff 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 3Remove 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.

[0057] 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.

[0058] Reference Figure 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.

[0059] The implementation principle of this application embodiment is as follows:

[0060] 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.

[0061] 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.

[0062] 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 vertically fixed on the bottom edge of the box (1) near the back side. 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 vertically mounted 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 position. The plate (4) can rotate upward to a vertical 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 the horizontal maintenance state. When the metering box is transported, the placement plate (4) first rotates to a vertical state that fits against the front side of the extension plate (3), and then the extension plate (3) and the placement plate (4) rotate together to a state that is flush with the bottom surface of the box body (1). The fastener (6) can be detachably connected to the support plate (5) at this time. The fixing component (6) is a sliding plate (61) that slides on the front side of the box (1) and can slide up and down. The box (1) is provided with a limiting component (7) that limits the sliding state of the sliding plate (61). A limiting plate (611) is fixedly provided on the bottom surface of the sliding plate (61) in the vertical direction. Two limiting rods (612) are fixedly provided side by side on the bottom surface of the limiting plate (611) in the vertical direction. When the metering box is in the transportation state, the support plate (5) is in the vertical upward state. A fixing groove (52) is opened on the top surface of the support plate (5) at this time. When the limiting rod (612) slides down with the sliding plate (61), it can be inserted into the fixing groove (52). The 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). 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 are 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 is inserted into the support groove (51). When the end slides down the sliding plate (61), it can be inserted into the limiting notch (6111) and be flush with the bottom surface of the box (1); the placement plate (4) is provided with a fixing through hole (41), the extension plate (3) is provided with 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 vertical folded state, and the box (1) is provided with a fixing bolt (12) that passes through the fixing through hole (41) and is screwed into the fixing screw hole (31) at the bottom; Each of the adjacent protective columns (8) has a clearance groove (81) on its side facing each other. A protective net (9) is provided between the adjacent protective columns (8). The two opposite sides of the protective net (9) are fixedly connected to the inner walls of the clearance groove (81) facing each other. After the sliding plate (61) moves up, the protective columns (8) can be removed from the bottom of the box (1). The adjacent protective columns (8) can then be split apart in a direction away from each other to unfold the protective net (9). The protective columns (8) are then placed vertically on the ground to protect the maintenance area. When the metering box is in the transport state, there is a clearance gap between the placement plate (4) and the bottom of the box (1). When the metering box is adjusted to the transport state, the protective columns (8) are removed from the bottom of the box (1), then adjusted to a horizontal state and placed in the clearance gap.

2. The portable power metering box according to claim 1, 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).

3. A portable energy metering box according to claim 1, characterized in that, The inner wall of the limiting notch (6111) is a guide slope (6112).

4. A portable power metering box according to claim 1, characterized in that, The fixing bolt (12) is a wing bolt (121).

5. A portable energy metering box according to claim 1, 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.

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