Single-phase multi-metering site non-metallic electric energy metering box

Abstract

This application relates to a single-phase multi-position non-metallic energy metering box, belonging to the technical field of smart grids. It includes a box body and a door rotatably mounted on the front side of the box body. The bottom surface of the box body has several wiring ports, and the left and right vertical sides have several heat dissipation vents. A positioning plate is detachably mounted on the back side of the box body along the vertical direction. The positioning plate has an arc-shaped notch on its side away from the box body and is fixed with several positioning clamps. A support member is provided at the bottom of the box body along an inclined direction. The support member connects the lower end face of the positioning plate and the front edge of the bottom of the box body. In this application, the inclined support member connects the positioning plate and the bottom surface of the box body, forming a triangular support structure, which significantly improves the load-bearing stability of the box body, buffers the impact of vibration on the clamp fastening force, avoids box tilting and cable loosening caused by the weakening of the fastening force, and ensures the accuracy of energy data acquisition.

Description

Technical Field

[0001] This application relates to the technical field of smart grids, and in particular to a single-phase multi-position non-metallic energy metering box. Background Technology

[0002] In the construction of smart grids, multi-position power metering boxes, as core terminal equipment of the power distribution system, undertake key functions such as power distribution, safety protection, data collection and transmission. Their installation stability and operational reliability are directly related to the power supply quality of the distribution network. Pole-mounted installation is widely used in urban roads, industrial parks, rural transformer substations, and other scenarios due to its advantages such as saving ground space, facilitating operation and maintenance, and avoiding damage from external ground forces. It is especially suitable for areas with concentrated power demand and limited terrain, such as intersections and main roads, and is one of the mainstream deployment solutions for outdoor power distribution facilities in smart grids.

[0003] In related technologies, existing pole-mounted power metering boxes mainly consist of a box body and a door that is rotatably connected to the front. The bottom of the box body has reserved wiring ports to meet the needs of orderly cable access and wiring management. The back of the box body is fixed with a special clamp structure. During installation, the clamps are used to securely connect with supporting carriers such as utility poles and street light poles, which can quickly achieve the suspension and fixation of the box body, ensuring that the box body maintains a standard and safe height from the ground, and effectively avoiding safety hazards caused by water accumulation, collision with debris, and human touch.

[0004] When an electricity metering box is installed on a pillar at an intersection where large vehicles frequently pass by, the continuous and frequent vibrations generated by these vehicles can cause the clamps and support to gradually weaken, leading to instability in the box's support. This not only affects the accuracy of electricity data collection but may also cause problems such as box tilting and loose cable connections, indicating room for improvement. Summary of the Invention

[0005] The purpose of this application is to provide a single-phase multi-position non-metallic power metering box to solve the problems in the above-mentioned related technologies, such as the decrease in clamping force caused by the vibration of large vehicles, unstable box support, affecting the accuracy of power collection and causing safety hazards.

[0006] The single-phase multi-position non-metallic energy metering box provided in this application adopts the following technical solution: A single-phase multi-position non-metallic energy metering box includes a box body and a door rotatably installed on the front side of the box body. The bottom surface of the box body has several wiring ports and the left and right vertical sides have several heat dissipation vents. A positioning plate is detachably installed on the back side of the box body along the vertical direction. The side of the positioning plate away from the box body has an arc-shaped notch and is fixed with several positioning clamps. A support member is provided at the bottom of the box body along the inclined direction. The support member is connected to the lower end face of the positioning plate and the front edge of the bottom of the box body.

[0007] By adopting the above technical solution, the cooperation between the positioning plate and the positioning clamp achieves a stable fit between the box and the support column. The arc-shaped notch design can adapt to columns of different diameters, enhancing installation adaptability. The inclined support component connects the positioning plate and the bottom surface of the box to form a triangular support structure, which greatly improves the load-bearing stability of the box, can buffer the impact of vibration on the clamp fastening force, avoid box tilting and cable loosening caused by the weakening of the fastening force, and ensure the accuracy of power data acquisition.

[0008] Optionally, the support component includes a support block and two support rods. A clearance notch is provided on the bottom surface of the positioning plate. One side edge of the support block is rotatably connected to the inner wall of the clearance notch, and the rotating surface of the support block is rotatably connected to the left and right vertical sides of the box. The other side edge of the support block is rotatably connected to the same end of the two support rods. When the support block is rotated to the vertically downward position, the rotating surfaces of the two support rods are parallel to the back side of the box. At this time, the two support rods can rotate towards each other to a vertically downward fitting state and away from each other to a horizontally coaxial state. A locking element is provided on the end of the support rod away from the support block. When the two support rods are in the fitting state, they can rotate upward to a state fitting with the bottom surface of the box. At this time, the locking element can detachably connect the end face of the support rod away from the support block to the bottom surface of the box.

[0009] By adopting the above technical solution, the rotating connection between the support block and the clearance notch, combined with the bidirectional rotating design of the two support rods, allows for switching between close-fitting storage and horizontal unfolding. When stored, it fits snugly against the bottom of the box and is secured by locking components, enhancing the vibration resistance of the triangular support. The unfolded state provides convenience for later maintenance. The overall structure is adaptable to various installation and maintenance scenarios, ensuring structural reliability during normal operation while reducing the difficulty of maintenance and improving ease of use.

[0010] Optionally, locking protrusions are fixedly provided on the end faces of the two support rods away from the support blocks along the inclined direction, and locking grooves are formed on the sides of the two locking protrusions that are far apart when the two support rods are in contact with each other; a locking slot is formed on the bottom surface of the box, and the locking component includes a locking plate located outside the common area of ​​the two support rods; extension plates are vertically fixed on the opposite two sides of the locking plate, and a locking insert is fixed on one side of the locking plate between the two extension plates; locking protrusions that slide in cooperation with the locking grooves are formed on the sides of the two extension plates that are far apart from each other; the locking plate can slide up and down when the two locking protrusions slide into the locking grooves and the side of the extension plate is in contact with the bottom surface of the box, and the locking insert can move up and embed into the locking slot at this time.

[0011] By adopting the above technical solution, the coordinated design of the locking plate, locking protrusion, and locking slot, along with the sliding cooperation between the locking protrusion and the locking groove, achieves precise guidance, ensuring that the locking block smoothly embeds into the locking slot. This improves the reliability of the connection between the support rod and the bottom surface of the enclosure, and enhances the overall structure's vibration resistance. Furthermore, the locking plate can be locked and unlocked simply by sliding up and down, making operation simple and efficient. This facilitates both initial installation and maintenance, and provides convenience for unlocking and separation during later repairs, balancing stability and practicality.

[0012] Optionally, the outer periphery of the locking block is provided with an elastic snap-fit ​​member, and the inner wall of the locking slot is provided with a positioning groove for the elastic snap-fit ​​member to snap into.

[0013] By adopting the above technical solution, the snap-fit ​​between the elastic snap-fit ​​component and the positioning groove can form a secondary limit on the locking block, preventing the block from loosening and falling out due to vibration, and strengthening the stability of the support structure; without increasing the complexity of operation, it takes into account both stable protection and ease of use.

[0014] Optionally, the elastic snap-fit ​​component includes a compression spring and an arc-shaped protrusion. A placement groove is provided on the outer side of the locking block for the compression spring and the arc-shaped protrusion to be inserted. One side of the compression spring presses against the arc-shaped protrusion, causing a part of the arc-shaped protrusion to protrude from the opening of the placement groove. The outer side of the protruding part of the arc-shaped protrusion is an arc surface, and the arc length corresponding to this arc surface is a minor arc.

[0015] By adopting the above technical solution, the combination of the compression spring and the arc-shaped protrusion can achieve a reliable elastic snap-fit. The inferior arc surface design facilitates smooth compression of the protrusion when the insert is inserted and easy disengagement when unlocking. This ensures a stable connection under vibration conditions and reduces the difficulty of installation and maintenance.

[0016] Optionally, the positioning plate has a dovetail-shaped cross-section, and a dovetail groove that is slidably connected to the positioning plate is provided on the back side of the box; support protrusions are fixed on the sides of the two support rods that are far apart when they are in contact with each other, and a support groove is provided on the bottom surface of the box; the box can move down when the support block is rotated to a vertical downward position and the two support rods are rotated to a horizontal coaxial position, and the support protrusion can be inserted into the support groove at this time.

[0017] By adopting the above technical solution, the cooperation between the dovetail positioning plate and the dovetail sliding groove enables precise sliding assembly of the enclosure and the positioning plate, improving connection stability and vibration resistance, while also facilitating initial installation and alignment. During maintenance, with the support block vertically downward and the support rod horizontally extended, the enclosure can be lowered so that the support protrusion engages with the support groove, achieving enclosure lowering and locking, significantly reducing the maintenance operation height, eliminating the need for additional hoisting equipment, improving operation and maintenance safety and efficiency, and balancing normal operation stability with maintenance practicality.

[0018] Optionally, both locking protrusions are provided with receiving grooves on the sides that are close to each other when the two support rods are in contact with each other, and a flexible receiving curtain is provided at the bottom of the box with its two sides fixedly connected to the inner walls of the two receiving grooves respectively.

[0019] By adopting the above technical solution, the receiving slot can store the receiving curtain without occupying extra space, ensuring the structural neatness of the equipment during normal operation. During maintenance, after the cabinet is lowered and locked, the receiving curtain unfolds from the receiving slot, which can temporarily place maintenance tools, preventing tools from falling or causing hand fatigue, and improving the convenience of operation; at the same time, it can also provide some shielding for the area below the cabinet, reducing the risk of debris falling into the cabinet, taking into account both storage convenience and maintenance practicality, and further optimizing the operation and maintenance experience.

[0020] Optionally, a fixing rod is slidably provided on the bottom surface of the box, and an elastic pressing member is provided to drive the fixing rod to slide toward the box door. A fixing slot is provided on the front side of the positioning plate. When the locking block is inserted into the locking slot, the locking protrusion presses the end face of the fixing rod away from the positioning plate, and the fixing rod is inserted into the fixing slot at the end of the positioning plate.

[0021] By adopting the above technical solution, in the normal state where the locking block is inserted into the locking slot, the locking protrusion presses against the fixing rod, causing it to insert into the fixing slot, forming a secondary fixation between the enclosure and the positioning plate, significantly improving vibration resistance and preventing enclosure shaking. During maintenance and unlocking, the locking block disengages from the slot, and the elastic pressing component drives the fixing rod out of the fixing slot, without obstructing the enclosure's downward movement, eliminating the need for additional unlocking operations. The overall structure achieves a balance between stability and convenience, ensuring both safe normal operation and efficient maintenance.

[0022] Optionally, the elastic compression member includes a first spring, a guide block fixed to the bottom surface of the box, and a protruding plate fixed to the outer periphery of the fixing rod. The guide block has a guide hole for the fixing rod to pass through. The protruding plate is located on the side of the guide block away from the positioning plate. The two ends of the first spring are fixedly connected to the protruding plate and the side of the guide block that are close to each other.

[0023] By adopting the above technical solution, the coordinated design of the first spring, guide block, and protruding plate ensures that the guide block provides precise guidance for the sliding of the fixed rod through the guide hole, preventing offset and jamming. The first spring, fixed at both ends to the protruding plate and guide block, can stably output elastic driving force, ensuring smooth extension of the fixed rod during locking and quick reset during maintenance. The overall structure features precise transmission and high stability, further guaranteeing the vibration resistance of secondary fixing and the convenience of maintenance and unlocking, thus improving the reliability of equipment operation.

[0024] Optionally, a first limiting block is fixed on the outer periphery of the protruding plate away from the fixing rod, and a second limiting block is fixed on the outer periphery of the guide block away from the fixing rod. An arc-shaped limiting opening is formed on the side of the first limiting block and the second limiting block that are close to each other. A second elastic pad is fixed on the inner wall of the arc-shaped limiting opening. When one end of the fixing rod is inserted into the fixing slot, the side of the first limiting block and the second limiting block that are close to each other abut against each other, and the two arc-shaped limiting openings facing each other form a limiting cavity that coincides with the wiring port.

[0025] By adopting the above technical solution, in the normal state where the fixing rod is inserted into the fixing slot, the first and second limiting blocks abut and enclose to form a limiting cavity that coincides with the wiring port. Combined with the second elastic pad, this securely limits the cable, preventing vibration from causing it to loosen or wear. During maintenance, the two limiting blocks separate as the fixing rod resets, without obstructing cable adjustment. The overall structure requires no additional cable fixing components, enhancing the equipment's stability while providing neat and protected cables, improving operational safety and ease of maintenance.

[0026] In summary, this application includes the following beneficial technical effects: In this application, the cooperation between the positioning plate and the positioning clamp achieves a stable fit between the box and the support column. The arc-shaped notch design can adapt to columns of different diameters, enhancing installation adaptability. The inclined support connects the positioning plate and the bottom surface of the box to form a triangular support structure, which greatly improves the load-bearing stability of the box, can buffer the impact of vibration on the clamp fastening force, avoid box tilting and cable loosening caused by the weakening of the fastening force, and ensure the accuracy of power data acquisition. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram illustrating the installation and assembly of the housing and positioning plate in an embodiment of this application; Figure 3 This is a partial cross-sectional view of the structure of the heat dissipation vents and wiring ports in an embodiment of this application; Figure 4 This is a partial structural diagram illustrating the installation and fit of the support components in an embodiment of this application; Figure 5 This is an exploded structural diagram illustrating the installation distribution of the positioning plate and support rod in an embodiment of this application; Figure 6 This is a partial cross-sectional structural diagram illustrating the installation and mating of the locking component in an embodiment of this application; Figure 7 yes Figure 6 An enlarged schematic diagram of part A in the middle; Figure 8 This is a partial structural diagram illustrating the mounting and mating of the support protrusion in an embodiment of this application; Figure 9 This is a partial cross-sectional view of an embodiment of the present application illustrating the installation and cooperation of the support protrusion and the support groove; Figure 10 This is a schematic diagram illustrating the installation and coordination of the flexible receiving curtain in an embodiment of this application; Figure 11 This is a partial cross-sectional view of the installation and fit of the fixing rod in an embodiment of this application; Figure 12 This is a partial cross-sectional structural diagram illustrating the installation and fit of the elastic extrusion component in an embodiment of this application.

[0028] In the diagram, 1. Cabinet; 11. Wiring port; 12. Heat dissipation vent; 13. Locking slot; 131. Positioning groove; 14. Dovetail slide; 15. Support groove; 2. Cabinet door; 3. Positioning plate; 31. Arc-shaped notch; 32. First elastic pad; 33. Positioning clamp; 34. Clearance notch; 35. Fixing slot; 4. Support component; 41. Support block; 42. Support rod; 421. Support protrusion; 43. Locking protrusion; 431. Locking slide; 432. Receiving groove; 5. 51. Locking component; 52. Locking plate; 53. Extension plate; 54. Locking protrusion; 55. Locking insert; 56. Placement slot; 57. Elastic snap-fit ​​component; 58. Compression spring; 59. Arc-shaped protrusion; 6. Flexible receiving curtain; 70. Fixing component; 71. Fixing rod; 72. Elastic extrusion component; 73. First spring; 74. Guide block; 75. Protrusion plate; 76. First limiting block; 77. Arc-shaped limiting opening; 78. Second limiting block; 79. Second elastic pad. Detailed Implementation

[0029] The present application will be further described in detail below with reference to all the accompanying drawings. Example

[0030] Reference Figure 1 , Figure 2 and Figure 3 A single-phase multi-position non-metallic energy metering box includes a box body 1, two boxes 2 rotatably installed on the front side of the box body 1, two wiring ports 11 opened on the bottom surface of the box body 1, and several heat dissipation vents 12 opened on the left and right vertical sides; a positioning plate 3 is detachably installed on the back side of the box body 1 along the vertical direction, an arc-shaped notch 31 is opened on the side of the positioning plate 3 away from the box body 1, two positioning clamps 33 are fixedly installed, and a first elastic pad 32 of rubber material is fixedly installed on the inner wall of the arc-shaped notch 31. A support member 4 is provided at the bottom of the box 1 along the inclined direction. The support member 4 is connected to the lower end face of the positioning plate 3 and the front edge of the bottom of the box 1 respectively. During the installation of the metering box, the positioning plate 3 is first fixed to the corresponding column by two positioning clamps 33. At this time, the first elastic pad 32 on the inner wall of the arc notch 31 is pressed against the outer periphery of the utility pole or lamp post. Then, the back side of the box 1 is detachably installed on the front side of the positioning plate 3. The support member 4 is then used to provide auxiliary support for the bottom of the box 1.

[0031] Reference Figure 4 and Figure 5 The support component 4 includes a support block 41 and two support rods 42. A clearance notch 34 is provided on the bottom surface of the positioning plate 3. One side edge of the support block 41 is rotatably connected to the inner wall of the clearance notch 34. The rotating surface of the support block 41 is rotatably connected to the left and right vertical sides of the box 1. The other side edge of the support block 41 is rotatably connected to the same end of the two support rods 42. When the support block 41 is rotated to the vertical downward state, the rotation surface of the two support rods 42 is parallel to the back side of the box 1. At this time, the two support rods 42 can rotate towards each other to the vertical downward fitting state and away from each other to the horizontal coaxial state. A locking element 5 is provided on the end of the support rod 42 away from the support block 41. When the support member 4 supports the bottom of the box 1, the two support rods 42 are adjusted to fit together beforehand, and then the two support rods 42 are rotated upwards to fit together with the bottom surface of the box 1. Finally, the locking member 5 is used to detachably connect the end face of the support rod 42 away from the support block 41 to the bottom surface of the box 1, thereby completing the inclined support of the bottom surface of the box 1.

[0032] Reference Figure 5 and Figure 6 Locking protrusions 43 are fixedly provided on the end faces of the two support rods 42 away from the support block 41 along the inclined direction. Locking grooves 431 are provided on the sides of the two locking protrusions 43 that are far apart when the two support rods 42 are in contact with each other. Locking slots 13 are provided on the bottom surface of the housing 1. The locking component 5 includes a locking plate 51 located outside the common area of ​​the two support rods 42. An extension plate 52 is vertically fixed on the opposite two sides of the locking plate 51, and a locking insert 53 located between the two extension plates 52 is fixed on one side. A locking protrusion 521 that slides with the locking groove 431 is provided on the side of the two extension plates 52 that are far apart from each other. When the two locking protrusions slide into the locking groove 431 and the side of the extension plate 52 is in contact with the bottom surface of the box 1, the locking plate 51 can slide up and down, and the locking insert 53 can move up and embed into the locking slot 13, thereby completing the detachable connection between the support rod 42 and the bottom surface of the box 1.

[0033] Reference Figure 6 and Figure 7The outer periphery of the locking plug 53 is provided with an elastic snap-fit ​​member 54, and the inner wall of the locking slot 13 is provided with a positioning groove 131 for the elastic snap-fit ​​member 54 to snap into; when the locking plug 53 moves upward and is inserted into the locking slot 13, the elastic snap-fit ​​member 54 snaps into the corresponding positioning groove 131. The elastic snap-fit ​​component 54 includes a compression spring 541 and an arc-shaped protrusion 542. The outer side of the locking insert 53 is provided with a placement groove 531 for the compression spring 541 and the arc-shaped protrusion 542 to be inserted. One side of the compression spring 541 presses the arc-shaped protrusion 542 so that a part of the arc-shaped protrusion 542 protrudes from the opening of the placement groove 531. The outer side of the protruding part of the arc-shaped protrusion 542 is an arc surface, and the arc length corresponding to the arc surface is a minor arc.

[0034] Reference Figure 8 and Figure 9 The cross-section of the positioning plate 3 is dovetail-shaped, and a dovetail groove 14 that is slidably connected to the positioning plate 3 is provided on the back side of the box body 1; support protrusions 421 are fixed on the sides of the two support rods 42 that are far apart when they are in contact with each other, and a support groove 15 is provided on the bottom surface of the box body 1. During later maintenance of the metering box, the locking block 53 is moved down to rotate the support block 41 to a vertical downward position. Then, the locking protrusion is slid out of the locking groove 431, so that the two support rods 42 rotate in opposite directions to a horizontal coaxial position. Then, the box body 1 is moved down as a whole until the support protrusion 421 is inserted into the support groove 15. The support rods 42 are used to limit and lock the box body 1 in the downward position, reducing the installation height of the box body 1 and facilitating maintenance.

[0035] Reference Figure 9 and Figure 10 The two locking protrusions 43 are provided with receiving grooves 432 on the sides that are close to each other when the two support rods 42 are in contact with each other. The bottom of the box body 1 is provided with flexible receiving curtains 6 whose two sides are fixedly connected to the inner walls of the two receiving grooves 432 respectively. When the metering box is inspected later, the box body 1 is in a downward state, and the state of the box body 1 is locked and limited by the support rods 42 and the support protrusions 421. At this time, the flexible receiving curtain 6 is extended from the receiving grooves 432, and the inspection tools can be temporarily placed on the upper surface of the flexible receiving curtain 6.

[0036] Reference Figure 11 and Figure 12The bottom of the box body 1 is provided with a fixing component 7, which includes a fixing rod 71 slidably mounted on the bottom surface of the box body 1 and an elastic pressing member 72 on the bottom surface of the box body 1 that drives the fixing rod 71 to slide toward the box door 2. A fixing slot 35 is provided on the front side of the positioning plate 3. The elastic pressing member 72 includes a first spring 721, a guide block 722 fixed on the bottom surface of the box body 1, and a protruding plate 723 fixed on the outer periphery of the fixing rod 71. A guide hole for the fixing rod 71 to pass through is provided on the guide block 722. The protruding plate 723 is located on the side of the guide block 722 away from the positioning plate 3. The two ends of the first spring 721 are fixedly connected to the sides of the protruding plate 723 and the guide block 722 that are close to each other. When the locking plug 53 is inserted into the locking slot 13 (that is, when the metering box is in normal use), one side of the locking protrusion 43 overcomes the elastic force of the elastic extrusion member 72 to press the end face of the fixing rod 71 away from the positioning plate 3, so that the end of the fixing rod 71 facing the positioning plate 3 is inserted into the fixing slot 35, thereby enhancing the stability of the box 1 in normal installation and application. When the locking plug 53 is removed from the locking slot 13 (that is, when the metering box is under maintenance), due to the action of the elastic extrusion member 72, one end of the fixing rod 71 is removed from the fixing slot 35, at which time the box 1 can be moved down for maintenance.

[0037] Reference Figure 11 and Figure 12 A first limiting block 73 is fixed on the outer periphery of the protruding plate 723 away from the fixed rod 71, and a second limiting block 74 is fixed on the outer periphery of the guide block 722 away from the fixed rod 71. An arc-shaped limiting opening 731 is opened on the side of the first limiting block 73 and the second limiting block 74 that are close to each other, and a second elastic pad 75 made of rubber is fixed on the inner wall of the arc-shaped limiting opening 731. When one end of the fixing rod 71 is inserted into the fixing slot 35 (that is, when the metering box is in normal use), the sides of the first limiting block 73 and the second limiting block 74 approach each other and abut against each other. At this time, the two opposing arc-shaped limiting ports 731 form a limiting cavity that coincides with the wiring port 11, and limit and tighten the outer periphery of the cable passing through the wiring port 11. When the locking plug 53 is dislodged from the locking slot 13 (i.e. during later maintenance of the metering box), due to the action of the first spring 721, the first limit block 73 slides away from the second limit block 74, which facilitates the adjustment of the cable passing through the terminal 11.

[0038] The implementation principle of this application embodiment is as follows: Normal installation state: The dovetail-shaped positioning plate 3 is fixed to the rod body by the positioning clamp 33, and the first elastic pad 32 is pressed against the rod body; the box body 1 is slidably mounted on the positioning plate 3 through the dovetail slide groove 14 on the back side, and then the two support rods 42 are adjusted to fit together and flipped upwards to fit against the bottom surface of the box body 1; the locking plate 51 slides through the cooperation of the locking protrusion 521 and the locking slide groove 431, so that the locking insert 53 is embedded into the locking slot 13, and the arc-shaped protrusion 542 of the elastic snap-fit ​​member 54 is locked into the positioning groove 131 by the action of the compression spring 541, thus completing the fixing of the support rod 42. At the same time, the locking protrusion 43 presses the fixing rod 71, so that it is inserted into the fixing slot 35, and the first limiting block 73 and the second limiting block 74 form a limiting cavity to clamp the cable.

[0039] Maintenance and repair status: Lowering the locking plate 51 disengages the locking block 53 from the slot. The fixing rod 71, under the action of the first spring 721, exits the fixing slot 35. At this time, the first limiting block 73 slides away from the second limiting block 74, facilitating adjustment of the cable passing through the terminal 11. Rotating the support block 41 to a vertically downward position separates the locking plate 51 from the support rod 42, causing the two support rods 42 to rotate in opposite directions to a horizontal coaxial state. Lowering the housing 1 causes the support protrusion 421 on the support rod 42 to embed into the support groove 15 on the bottom surface of the housing 1, achieving a limited height reduction of the housing 1. At this time, the flexible receiving curtain 6 inside the receiving slot 432 unfolds, allowing for temporary placement of maintenance tools for easy operation.

[0040] 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 included within the scope of protection of this application.

Claims

1. A single-phase multi-position non-metallic energy metering box, comprising a box body (1) and a box door (2) rotatably mounted on the front side of the box body (1), wherein the bottom surface of the box body (1) is provided with a plurality of wiring ports (11) and the left and right vertical sides are provided with a plurality of heat dissipation vents (12); characterized in that, A positioning plate (3) is detachably installed on the back side of the box (1) along the vertical direction. The positioning plate (3) has an arc-shaped notch (31) on the side away from the box (1) and is fixed with several positioning clamps (33). A support member (4) is provided at the bottom of the box (1) along the inclined direction. The support member (4) is connected to the lower end face of the positioning plate (3) and the front edge of the bottom of the box (1) respectively.

2. The single-phase multi-position non-metallic energy metering box according to claim 1, characterized in that, The support member (4) includes a support block (41) and two support rods (42). A clearance notch (34) is provided on the bottom surface of the positioning plate (3). One side edge of the support block (41) is rotatably connected to the inner wall of the clearance notch (34). The rotating surface of the support block (41) is rotatably connected to the left and right vertical sides of the box (1). The other side edge of the support block (41) is rotatably connected to the same end of the two support rods (42). When the support block (41) rotates to the vertical downward state, the rotation surface of the two support rods (42) is parallel to the back side of the box (1). At this time, the two support rods (42) can rotate towards each other to the vertical downward fitting state and towards each other to the horizontal coaxial state. A locking element (5) is provided on the end of the support rod (42) away from the support block (41). When the two support rods (42) are in a close-fitting state, they can be rotated upwards to a state that is close to the bottom surface of the box (1). At this time, the locking element (5) can detachably connect the end face of the support rod (42) away from the support block (41) to the bottom surface of the box (1).

3. A single-phase multi-position non-metallic energy metering box according to claim 2, characterized in that, Locking protrusions (43) are fixedly provided on the end faces of the two support rods (42) away from the support block (41) along the inclined direction. Locking protrusions (43) are provided on the sides of the two locking protrusions (43) that are far apart when the two support rods (42) are in contact with each other. Locking slots (13) are provided on the bottom surface of the box (1). The locking component (5) includes a locking plate (51) located outside the common area of ​​the two support rods (42). The locking plate (51) has an extension plate (52) fixed vertically on its two opposite sides and a locking insert (53) fixed on one side. The two extension plates (52) have a locking protrusion (521) that slides in cooperation with the locking groove (431) on their opposite sides. The locking plate (51) can slide up and down when the two locking protrusions slide into the locking groove (431) and the side of the extension plate (52) is in contact with the bottom surface of the box (1). At this time, the locking insert (53) can move up and embed into the locking slot (13).

4. A single-phase multi-position non-metallic energy metering box according to claim 3, characterized in that, The outer periphery of the locking plug (53) is provided with an elastic snap-fit ​​member (54), and the inner wall of the locking slot (13) is provided with a positioning groove (131) for the elastic snap-fit ​​member (54) to be snapped into.

5. A single-phase multi-position non-metallic energy metering box according to claim 4, characterized in that, The elastic snap-fit ​​component (54) includes a compression spring (541) and an arc-shaped protrusion (542). The outer side of the locking plug (53) is provided with a placement groove (531) for the compression spring (541) and the arc-shaped protrusion (542) to be placed. One side of the compression spring (541) presses the arc-shaped protrusion (542) so that a part of the arc-shaped protrusion (542) protrudes from the opening of the placement groove (531). The outer side of the protruding part of the arc-shaped protrusion (542) is an arc surface, and the arc length corresponding to the arc surface is a minor arc.

6. A single-phase multi-position non-metallic energy metering box according to claim 3, characterized in that, The positioning plate (3) has a dovetail-shaped cross section. The back side of the box (1) is provided with a dovetail groove (14) that is slidably connected to the positioning plate (3). Supporting protrusions (421) are fixed on the sides of the two support rods (42) that are far apart when they are in contact with each other. Supporting grooves (15) are provided on the bottom surface of the box (1). The box (1) can move down when the support block (41) is rotated to a vertical downward position and the two support rods (42) are rotated to a horizontal coaxial position. At this time, the supporting protrusions (421) can be inserted into the supporting grooves (15).

7. A single-phase multi-position non-metallic energy metering box according to claim 6, characterized in that, The two locking protrusions (43) are provided with receiving grooves (432) on the sides that are close to each other when the two support rods (42) are in contact with each other. The box body (1) is provided with flexible receiving curtains (6) with two sides that are fixedly connected to the inner walls of the two receiving grooves (432) respectively.

8. A single-phase multi-position non-metallic energy metering box according to claim 6, characterized in that, The bottom surface of the box (1) is provided with a fixed rod (71) and an elastic extrusion member (72) that drives the fixed rod (71) to slide toward the box door (2). The front side of the positioning plate (3) is provided with a fixed slot (35). When the locking protrusion (43) is inserted into the locking slot (13), it presses the end face of the fixing rod (71) away from the positioning plate (3), and the end of the fixing rod (71) facing the positioning plate (3) is inserted into the fixing slot (35).

9. A single-phase multi-position non-metallic energy metering box according to claim 8, characterized in that, The elastic compression member (72) includes a first spring (721), a guide block (722) fixed on the bottom surface of the housing (1), and a protruding plate (723) fixed on the outer periphery of the fixing rod (71). The guide block (722) has a guide hole for the fixing rod (71) to pass through. The protruding plate (723) is located on the side of the guide block (722) away from the positioning plate (3). The two ends of the first spring (721) are fixedly connected to the protruding plate (723) and the guide block (722) respectively on the sides that are close to each other.

10. A single-phase multi-position non-metallic energy metering box according to claim 9, characterized in that, A first limiting block (73) is fixed on the outer periphery of the protruding plate (723) away from the fixed rod (71), and a second limiting block (74) is fixed on the outer periphery of the guide block (722) away from the fixed rod (71). An arc-shaped limiting opening (731) is provided on the side of the first limiting block (73) and the second limiting block (74) that are close to each other. A second elastic pad (75) is fixed on the inner wall of the arc-shaped limiting port (731); the sides of the first limiting block (73) and the second limiting block (74) that are close to each other abut against each other when one end of the fixing rod (71) is inserted into the fixing slot (35), and the two arc-shaped limiting ports (731) facing each other form a limiting cavity that coincides with the wiring port (11).

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