Metering box with junction box

Abstract

The invention relates to a metering box with a junction box, and relates to the technical field of metering boxes, the metering box comprises a box body and a box door installed on the box body, and the inner wall of the box body is fixedly provided with a substrate for installing a circuit breaker; a fixing shell and a wiring block are arranged in the box body, one side of the fixing shell is detachably installed on the inner wall of the substrate, and a fixing notch for the wiring block to be installed in is formed in the side face, away from the substrate, of the fixing shell; one side of the wiring block is fixedly provided with a conducting strip connected with a binding post on the circuit breaker, and one side, far away from the conducting strip, of the wiring block is provided with a plurality of wiring holes for connecting and fixing cables; the plurality of cables can be pre-installed in the corresponding wiring holes and are electrically connected with the conductive sheets. In the application, during subsequent installation, only the wiring block provided with the cable needs to be integrally installed in the fixing gap of the fixing shell, and then the conducting strip on the wiring block is connected with the wiring terminal of the circuit breaker.

Description

Technical Field

[0001] The present application relates to the technical field of metering boxes, and in particular to a metering box with a junction box. Background Art

[0002] In the field of electricity metering, wall-mounted meter boxes serve as core equipment. By integrating energy meters, transformers, circuit breakers, and other components, they enable accurate energy data collection and line protection. Their wall-mounted design saves installation space, adapts to diverse scenarios, and facilitates future operation and maintenance. They are particularly well-suited to the growing urbanization demand for compact and intelligent electrical equipment in residential, commercial, and industrial settings. With increasing power load density and increasingly refined electricity management, the application breadth and performance requirements of this type of equipment continue to rise.

[0003] The current mainstream wall-mounted three-meter meter box adopts a modular structure, consisting of a box body, door, and internal components. The box houses core components such as a miniature circuit breaker and plug-in three-phase meters, and electrical connections are made via pre-installed cables. Specifically, each meter requires three cables (live, neutral, and ground) to be connected to the corresponding terminals on the circuit breaker. For the three meters, a total of nine cables must be terminated and secured one by one.

[0004] Due to the large number of cables, subsequent staff spent a long time in installing and fixing the cables. Each cable needed to be connected and fixed to the terminal on the circuit breaker. The overall efficiency was low and there was room for improvement. Summary of the Invention

[0005] The purpose of the present application is to provide a meter box with a junction box to solve the problem of low installation efficiency of multiple cables connecting the meter box and the circuit breaker inside the meter box in the above-mentioned related art.

[0006] The present application provides a metering box with a junction box adopting the following technical solution: A metering box with a junction box comprises a box body and a box door mounted on the box body, wherein a base plate for mounting a circuit breaker is fixedly provided on the inner wall of the box body; a fixed shell and a junction block are provided within the box body, wherein one side of the fixed shell is detachably mounted on the inner wall of the base plate, and a fixed notch for mounting the junction block is provided on a side of the fixed shell away from the base plate; a conductive sheet connected to a terminal post on the circuit breaker is fixedly provided on one side of the junction block, and a plurality of wiring holes for connecting and fixing cables are provided on a side of the junction block away from the conductive sheet; a plurality of cables can be pre-installed in corresponding wiring holes and electrically connected to the conductive sheet.

[0007] By adopting the above technical solution, in this application, the terminal block is pre-set with several wiring holes, which can pre-install multiple corresponding cables into the wiring holes and electrically connect them to the conductive plates, thereby establishing a circuit path between the electricity meter and the circuit breaker. During subsequent installation, it is only necessary to install the terminal block with the cables installed as a whole into the fixed notch of the fixed shell, and then connect the conductive plates on the terminal block to the circuit breaker terminal. There is no need to tediously connect each cable individually to the circuit breaker terminal. This design greatly simplifies the cable installation process, reduces the operating steps and time costs of the staff, significantly improves the efficiency of cable installation, and at the same time ensures the stability and reliability of the circuit connection.

[0008] Optionally, the fixed shell is detachably mounted with a base and an upper cover on the side close to the wiring hole, and limiting notches are provided on the sides of the base and the lower cover close to each other; an elastic pad is fixed on the inner wall of the limiting notch, and the two limiting notches together surround a limiting hole coaxial with the wiring hole for the cable to pass through.

[0009] By adopting the above technical solution, the base and upper cover are detachably mounted on the side of the fixed shell near the wiring hole. The limiting notches opened on the sides of the two shells form a limiting hole coaxial with the wiring hole, through which the cable passes, and the elastic pad on the inner wall of the limiting notch is pressed against the outer peripheral surface of the cable. The elastic pad can play a buffering and protective role, avoiding wear caused by hard contact between the cable and the limiting hole. At the same time, its elastic deformation characteristics can adapt to cables of different wire diameters, ensuring effective clamping of the cable. In this way, the limiting hole accurately positions and firmly limits the cable, effectively preventing the cable from shaking or displacement, ensuring the stability of the electrical connection between the cable and the wiring block, and thereby improving the reliability and safety of the overall operation of the meter box.

[0010] Optionally, a guide groove for the wiring block to slide and snap into is provided on the opening edge of the fixing notch close to the base, and the side of the wiring block away from the conductive sheet abuts against one side of the base.

[0011] By adopting this technical solution, a guide groove is provided near the opening edge of the base near the fixing notch. The terminal block can slide precisely along the guide groove and snap into the fixed shell. This guide structure provides a clear path for the terminal block installation, effectively preventing installation deviation and ensuring the terminal block is installed in place in one go, greatly improving installation efficiency. At the same time, the side of the terminal block away from the conductive sheet abuts against the side of the base, using the base to provide stable support and positioning for the terminal block, further enhancing the stability of the terminal block after installation, reducing the risk of loose connections due to shaking or external impact, and ensuring the stability and reliability of the circuit path between the energy meter and the circuit breaker.

[0012] Optionally, two positioning rods are installed on the two opposite outer sides of the upper cover, and a plurality of positioning slots for inserting the ends of the positioning rods are opened on the base plate; the fixed shell is slidably arranged on the base plate, and the sliding direction of the fixed shell is perpendicular to the length direction of the positioning rods.

[0013] By adopting this technical solution, during installation, the fixed shell can be first slid into the appropriate position, and then the positioning rods are inserted into the corresponding positioning slots to achieve precise positioning and fixation. This combination of sliding adjustment and multi-point positioning allows the fixed shell to be flexibly adjusted to suit different usage scenarios, component specifications, and maintenance requirements, fully optimizing the internal space layout. Furthermore, during subsequent maintenance, the fixed shell can be easily slid out by simply pulling out the positioning rods, providing ample space for operations such as inspection and component replacement, effectively shortening maintenance time and reducing maintenance costs.

[0014] Optionally, a dovetail slide rail is fixedly provided on the base plate, and a dovetail slide groove for the dovetail slide rail to pass through is opened on the bottom side of the fixed shell.

[0015] By adopting this technical solution, the dovetail rails and dovetail grooves work together during installation and sliding of the fixed housing, precisely limiting its sliding direction and ensuring smooth movement along the predetermined path, avoiding deviation and shaking. This structure not only improves installation accuracy and ensures accurate docking of the fixed housing with internal components, but also enhances overall structural stability, reducing the risk of loose connections due to vibration or external impact, thereby facilitating the long-term stable operation of the meter box and extending its service life.

[0016] Optionally, an elastic clamping piece is provided on the outer periphery of the end portion of the positioning rod away from the upper cover, and a positioning groove for the elastic clamping piece to be clamped into is formed on the inner wall of the positioning slot.

[0017] By adopting this technical solution, when the positioning rod is inserted into the positioning slot, the elastic clip is squeezed and deformed, then snaps into the positioning groove, achieving automatic locking. This structure not only avoids complex bolting operations, simplifying the installation process and improving efficiency, but also, thanks to the tight engagement of the elastic clip and the positioning groove, provides a stable and reliable connection to the fixed shell, effectively resisting external interference, ensuring a stable connection with the baseboard, ensuring normal electrical connection of internal components, and enhancing the overall operational reliability and safety of the meter box.

[0018] Optionally, a connecting rod is vertically fixed to the end of the positioning rod close to the upper cover, and the end of the connecting rod away from the positioning rod is hinged to the side of the upper cover away from the base; the two positioning rods can be rotated in the direction away from the base until they are in abutment with each other, and when the two positioning rods are in this state, magnetic blocks are embedded on the two side surfaces close to each other, and the magnetic blocks on the two positioning rods are in abutment and attract each other in this state.

[0019] By adopting the above technical solution, when installing the fixed shell, the retracted positioning rod reduces the space occupied, making it convenient to flexibly adjust the position of the fixed shell in a narrow box. After sliding to the appropriate position, the positioning rod is rotated and inserted into the positioning slot to complete the fixation; when disassembling, the positioning rod is pulled outward and retracted to quickly make room for operation, making it convenient to inspect and replace the fixed shell and internal components.

[0020] Optionally, a locking plate is fixedly provided on the side edge of the fixed shell near the base, and a locking block is fixedly provided on the side of the base near the fixed shell, and a locking notch for inserting the locking plate is provided on the locking block; a locking rod is slidably provided on the base and is located above the locking block, and an adjusting member for controlling the locking rod to slide up and down is installed, a locking through hole connected to the locking notch is provided on the locking block, and a locking slot that can be connected to the locking through hole is provided on the locking plate; the end of the locking rod can pass through the locking through hole under the action of the adjusting member and then be inserted into the locking slot.

[0021] By adopting this technical solution, the locking plate of the fixed housing inserts into the locking notch of the base's locking block, achieving initial positioning. The adjusting member then controls the locking rod to slide downward, allowing its end to pass through the locking hole of the locking block and then into the locking slot of the locking plate, achieving double locking. This design significantly enhances the connection strength between the fixed housing and the base, effectively preventing relative displacement between the two and ensuring the stability of the circuit connection. Furthermore, when maintenance is required, the locking rod can be released by lifting the adjusting member, facilitating removal of the fixed housing. This simple and convenient operation reduces maintenance time and effort.

[0022] Optionally, the adjusting member includes an elastic reset member that drives the locking rod to slide away from the locking block, the elastic reset member includes a first spring, a guide block fixed on the base, and a baffle fixed on the outer periphery of the locking rod, the guide block is provided with a guide hole for the locking rod to pass through, the baffle is located on the side of the guide block away from the locking block, and the two ends of the first spring are respectively fixedly connected to the sides of the guide block and the baffle that are close to each other.

[0023] By adopting this technical solution, when unlocking is required, the first spring pulls the locking rod through the baffle to automatically reset it. The cooperation between the guide block and the guide hole ensures the precise sliding of the locking rod, preventing deviation and jamming. This design simplifies the operation process and reduces maintenance difficulty.

[0024] Optionally, the adjusting member includes an adjusting rod fixed on the positioning rod, and a guide slope is provided on the end edge of the locking rod away from the base; when the positioning rod is inserted into the positioning slot, the adjusting rod squeezes the locking rod along the guide slope, causing the locking rod to move downward and be inserted into the locking slot.

[0025] By adopting this technical solution, when the positioning rod is inserted into the positioning slot, the adjustment rod fixed to it cooperates with the guiding inclined surface at the end of the locking rod. The inclined surface squeezes the adjustment rod's lateral thrust into the vertical downward force of the locking rod, causing the locking rod to automatically insert into the locking slot and complete the locking. The entire process requires no additional manual operation; the insertion of the positioning rod triggers the locking, simplifying the installation process while ensuring locking reliability through mechanical linkage, reducing the risk of human error.

[0026] In summary, this application has the following beneficial technical effects: In this application, the terminal block is pre-configured with several wiring holes, allowing multiple cables to be pre-installed into the holes and electrically connected to the conductive plates, establishing a circuit path between the energy meter and the circuit breaker. During subsequent installation, the entire terminal block, with the cables installed, simply fits into the fixed notch of the fixed housing and then connects the conductive plates on the terminal block to the circuit breaker terminals, eliminating the need for the tedious process of individually connecting each cable to the circuit breaker terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 This is a partial cross-sectional structural diagram of the installation and coordination of the wiring assembly according to the first embodiment of the present application; Figure 3 This is a partial structural diagram of the installation and coordination of the wiring assembly according to the second embodiment of the present application; Figure 4 This is a partial structural diagram of the installation and coordination of the limit assembly in Example 2 of the present application; Figure 5 This is an exploded structural diagram of the installation distribution of the limit assembly and the wiring assembly according to Example 2 of the present application; Figure 6 This is a partial cross-sectional structural diagram of the second embodiment of the present application showing the installation and coordination of the positioning rod; Figure 7 yes Figure 6 A magnified schematic diagram of part A; Figure 8 This is a partial cross-sectional structural diagram of the installation and coordination of the magnetic block according to the second embodiment of the present application; Figure 9This is a schematic diagram of the exploded structure of the installation distribution of the locking block and the locking plate in Example 2 of the present application; Figure 10 This is a partial cross-sectional structural diagram of the second embodiment of the present application showing the installation and cooperation between the locking block and the locking plate; Figure 11 This is a schematic diagram of the partial cross-sectional structure of the second embodiment of the present application showing the installation and cooperation between the locking rod and the adjusting member.

[0029] In the figure, 1, box body; 11, box door; 12, base plate; 121, positioning slot; 1211, positioning groove; 122, dovetail slide; 2, wiring assembly; 21, fixing shell; 211, fixing notch; 212, guide sink; 213, locking plate; 2131, locking slot; 214, dovetail slide; 22, wiring block; 221, conductive sheet; 222, wiring hole; 3, limit assembly; 31, base; 311, limit notch; 312, spring : pad; 313, locking block; 3131, locking notch; 3132, locking through hole; 32, upper cover; 4, positioning assembly; 41, positioning rod; 411, placement groove; 42, elastic clip; 421, arc-shaped protrusion; 422, compression spring; 43, connecting rod; 44, magnetic block; 5, locking rod; 51, guide slope; 6, adjusting member; 61, elastic reset member; 611, first spring; 612, guide block; 613, baffle; 62, adjusting rod. DETAILED DESCRIPTION

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

[0031] Example 1: Reference Figure 1 and Figure 2 A metering box with a junction box includes a box body 1 and two box doors 11 mounted on the box body 1. The sides of the two box doors 11 that are away from each other are rotatably connected to the opening edge of the box body 1, and the sides of the two box doors 11 that are close to each other are detachably connected to the box body 1 through a conventional lock structure; A base plate 12 is fixed to the vertical inner wall of the box body 1 by screws, and the circuit breaker can be fixed to the base plate 12 by screws; and three wiring assemblies 2 for connecting the electric energy meter and the circuit breaker are installed on the base plate 12 in the box body 1, and a single wiring assembly 2 is used to connect with the three cables led out from the corresponding three-phase electric energy meter.

[0032] Reference Figure 2 The wiring assembly 2 includes a fixed shell 21 and a wiring block 22, wherein one side of the fixed shell 21 is detachably mounted on the inner wall of the base plate 12 by screws, and a fixing notch 211 for the wiring block 22 to be installed and snapped into is provided on the side of the fixed shell 21 away from the base plate 12; A conductive plate 221 connected to the terminal post on the circuit breaker is fixed on one side of the terminal block 22. Three wiring holes 222 for cables to enter and are fixed by screws are opened on the side of the terminal block 22 away from the conductive plate 221; three cables can be pre-installed in the corresponding wiring holes 222 and electrically connected to the conductive plate 221.

[0033] The implementation principle of the embodiment of this application is: A conductive sheet 221 connected to the circuit breaker terminal is provided on one side of the terminal block 22, and three wiring holes 222 are provided on the other side. During operation, the three cables corresponding to the three-phase electric energy meter are pre-installed into the wiring holes 222 and fixed with screws to electrically connect the cables to the conductive sheet 221, thereby establishing a circuit path between the electric energy meter and the circuit breaker, realizing the metering and distribution functions of electric energy.

[0034] Example 2: Reference Figure 3 、 Figure 4 and Figure 5 The embodiment of the present application differs from the first embodiment in that a limiting assembly 3 is installed on a side of the fixed housing 21 near the wiring hole 222 to limit the position of the cable near the wiring block 22, wherein the limiting assembly 3 includes a base 31 and an upper cover 32 detachably mounted on one side of the fixed housing 21, and limiting notches 311 are formed on the sides of the base 31 and the lower cover adjacent to each other; An elastic pad 312 made of rubber is fixed on the inner wall of the limiting notch 311, and the two opposing limiting notches 311 jointly surround a limiting hole coaxial with the wiring hole 222 for the cable to pass through; when the cable is installed in the wiring hole 222 on the wiring block 22 and the wiring block 22 is installed on the fixed shell 21, the cable simultaneously passes through the limiting holes surrounded by the two limiting notches 311, and then the base 31 and the upper cover 32 are assembled and fixed by screws, and the outer peripheral surface of this part of the cable is tightly pressed against the elastic pad 312.

[0035] Reference Figure 4 and Figure 5 A guide groove 212 is provided on the opening edge of the fixing notch 211 near the base 31 for the wiring block 22 to slide and snap into; when the base 31 is installed on one side of the fixed shell 21, the side of the wiring block 22 away from the conductive sheet 221 abuts against one side of the base 31, thereby realizing the assembly and fixation of the wiring block 22 and the fixed shell 21.

[0036] Reference Figure 6 A positioning assembly 4 is provided on the outside of the upper cover 32, wherein the positioning assembly 4 includes two positioning rods 41 provided on two opposite outer sides of the upper cover 32, and a plurality of positioning slots 121 for inserting the ends of the positioning rods 41 are uniformly provided on the base plate 12; a dovetail guide rail 122 is fixed on the base plate 12, and a dovetail guide groove 214 for the dovetail guide rail 122 to pass through is provided on the bottom side of the fixed shell 21; This method realizes the sliding connection between the fixed shell 21 and the base plate 12, and the sliding direction of the fixed shell 21 is perpendicular to the length direction of the positioning rod 41; when the fixed shell 21 slides to a certain position, the positioning rod 41 can be used to pass through the positioning slot 121 corresponding to this state, thereby realizing the assembly and fixation of the fixed shell 21 and the base plate 12.

[0037] Reference Figure 6 and Figure 7 An elastic clamping member 42 is provided on the outer periphery of the end of the positioning rod 41 away from the upper cover 32, wherein the elastic clamping member 42 includes a compression spring 422 and an arc-shaped protrusion 421. A placement groove 411 for the compression spring 422 and the arc-shaped protrusion 421 is provided on the positioning rod 41. The compression spring 422 presses one side of the arc-shaped protrusion 421 so that a portion of the arc-shaped protrusion 421 protrudes out of the placement groove 411, and the outer side surface of the protruding portion of the arc-shaped protrusion 421 is an arc surface, and the arc length corresponding to the arc surface is a minor arc. A positioning groove 1211 is provided on the inner wall of the positioning slot 121 for the elastic clamping member 42 to be clamped into; when the end of the positioning rod 41 is inserted into the positioning slot 121, the compression spring 422 squeezes the arc-shaped protrusion 421, so that a part of the arc-shaped protrusion 421 is clamped into the positioning groove 1211.

[0038] Reference Figure 8 and Figure 9 A connecting rod 43 is vertically fixed to the end of the positioning rod 41 close to the upper cover 32, and the end of the connecting rod 43 away from the positioning rod 41 is hinged to the side of the upper cover 32 away from the base 31; the two positioning rods 41 can be rotated in the direction away from the base 31 until they abut against each other. When the two positioning rods 41 are in this state, magnetic blocks 44 are embedded on the two side surfaces close to each other. The magnetic blocks 44 on the two positioning rods 41 abut and attract each other in this state.

[0039] Reference Figure 9 、 Figure 10 and Figure 11 A locking plate 213 is fixedly provided on the side edge of the fixed shell 21 near the base 31, and a locking block 313 is fixedly provided on the side of the base 31 near the fixed shell 21. The locking block 313 has a locking notch 3131 for inserting the locking plate 213; a locking rod 5 is slidably provided on the base 31 and is located above the locking block 313, and an adjusting member 6 is installed to control the upward and downward sliding of the locking rod 5; The locking block 313 is provided with a locking through hole 3132 which is connected to the locking notch 3131, and the locking plate 213 is provided with a locking slot 2131 which can be connected to the locking through hole 3132; under the action of the adjusting member 6, the end of the locking rod 5 can pass through the locking through hole 3132 and then be inserted into the locking slot 2131, thereby controlling the locking and unlocking between the fixed shell 21 and the base 31, making it convenient for the quick disassembly and assembly of the two.

[0040] Reference Figure 11 The adjusting member 6 includes an elastic return member 61 that drives the locking rod 5 to slide in a direction away from the locking block 313, wherein the elastic return member 61 includes a first spring 611 in a compressed state, a guide block 612 fixed on the base 31, and a baffle 613 fixed on the outer periphery of the locking rod 5. A guide hole for the locking rod 5 to pass through is opened on the guide block 612, and the baffle 613 is located on the side of the guide block 612 away from the locking block 313. The two ends of the first spring 611 are respectively fixedly connected to the side surfaces of the guide block 612 and the baffle 613 that are close to each other; The adjusting member 6 also includes an adjusting rod 62 fixed on the positioning rod 41, and a guide slope 51 is provided on the end edge of the locking rod 5 away from the base 31; when the positioning rod 41 is inserted into the positioning slot 121, the adjusting rod 62 can squeeze the locking rod 5 along the guide slope 51, so that the locking rod 5 moves down and is inserted into the locking slot 2131.

[0041] The implementation principle of the embodiment of this application is: When installing the terminal block 22, it slides along the guide groove 212 into the fixed notch 211 of the fixed shell 21, and at the same time, the side of the terminal block 22 abuts against the base 31 to complete the preliminary assembly; the fixed shell 21 is slidably connected to the base plate 12 through the dovetail slide rail 122. After sliding to the appropriate position, the positioning rod 41 is inserted into the corresponding positioning slot 121, and the arc-shaped protrusion 421 of the elastic clamping member 42 is clamped into the positioning groove 1211 under the action of the compression spring 422, thereby completing the assembly and fixation of the fixed shell 21 and the base plate 12; After that, the base 31 is mounted on the fixed housing 21. The locking plate 213 is inserted into the locking notch 3131 of the locking block 313. When the positioning rod 41 is inserted into the positioning slot 121, the adjusting rod 62 presses the locking rod 5 along the guiding inclined surface 51 at the end of the locking rod 5, compressing the first spring 611 of the elastic return member 61, so that the locking rod 5 passes through the locking through hole 3132 and is inserted into the locking slot 2131, thereby locking the fixed housing 21 and the base 31. To disassemble, the operation is reversed. The cable is limited by the limiting hole surrounded by the base 31 of the limiting component 3 and the limiting notch 311 of the upper cover 32. The elastic pad 312 in the limiting notch 311 is pressed against the cable to ensure the stability of the cable, thereby realizing the convenient and stable assembly of the various components of the meter box and the efficient power metering and distribution function.

[0042] Unless otherwise defined, the terms or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "A" or "one" and other similar words do not indicate a quantity limit, but rather indicate the existence of at least one. "Include" or "comprising" and other similar words mean that the elements or objects appearing before "include" or "comprising" cover the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] The examples of this specific embodiment are all 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, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A metering box with a junction box, comprising a box body (1) and a box door (11) mounted on the box body (1), wherein a base plate (12) for mounting a circuit breaker is fixedly provided on the inner wall of the box body (1); characterized in that: A fixed shell (21) and a junction block (22) are provided in the box body (1); one side of the fixed shell (21) is detachably mounted on the inner wall of the base plate (12); a fixed notch (211) for the junction block (22) to be installed is provided on the side of the fixed shell (21) away from the base plate (12); A conductive sheet (221) connected to a terminal post on a circuit breaker is fixedly provided on one side of the wiring block (22); a plurality of wiring holes (222) for connecting and fixing cables are provided on a side of the wiring block (222) away from the conductive sheet (221); and a plurality of cables can be pre-installed in corresponding wiring holes (222) and electrically connected to the conductive sheet (221).

2. A metering box with a junction box according to claim 1, characterized in that: The fixed shell (21) is detachably mounted with a base (31) and an upper cover (32) on one side close to the wiring hole (222), and a limiting notch (311) is provided on the sides of the base (31) and the lower cover close to each other; An elastic pad (312) is fixedly provided on the inner wall of the limiting notch (311), and the two limiting notches (311) together surround a limiting hole coaxial with the wiring hole (222) for the cable to pass through.

3. A metering box with a junction box according to claim 2, characterized in that: A guide groove (212) for the wiring block (22) to slide and snap into is provided on the opening edge of the fixing notch (211) close to the base (31), and the side of the wiring block (22) away from the conductive sheet (221) abuts against one side of the base (31).

4. A metering box with a junction box according to claim 2, characterized in that: Two positioning rods (41) are installed on two opposite outer sides of the upper cover (32), and a plurality of positioning slots (121) for inserting the ends of the positioning rods (41) are provided on the base plate (12); the fixed shell (21) is slidably arranged on the base plate (12), and the sliding direction of the fixed shell (21) is perpendicular to the length direction of the positioning rods (41).

5. A metering box with a junction box according to claim 4, characterized in that: A dovetail slide rail (122) is fixedly provided on the base plate (12), and a dovetail slide groove (214) for the dovetail slide rail (122) to pass through is provided on the bottom side of the fixed shell (21).

6. A metering box with a junction box according to claim 4, characterized in that: An elastic clamping piece (42) is provided on the outer periphery of the end of the positioning rod (41) away from the upper cover (32), and a positioning groove (1211) for the elastic clamping piece (42) to be clamped is provided on the inner wall of the positioning slot (121).

7. A metering box with a junction box according to claim 4, characterized in that: A connecting rod (43) is vertically fixed to the end of the positioning rod (41) close to the upper cover (32), and the end of the connecting rod (43) away from the positioning rod (41) is hinged to the side of the upper cover (32) away from the base (31); The two positioning rods (41) can rotate in a direction away from the base (31) until they abut against each other. When the two positioning rods (41) are in this state, magnetic blocks (44) are embedded on the two side surfaces close to each other. In this state, the magnetic blocks (44) on the two positioning rods (41) abut against and attract each other.

8. A metering box with a junction box according to claim 7, characterized in that: A locking plate (213) is fixedly provided on the side edge of the fixed shell (21) close to the base (31), and a locking block (313) is fixedly provided on the side of the base (31) close to the fixed shell (21). The locking block (313) is provided with a locking notch (3131) for inserting the locking plate (213); The base (31) is slidably provided with a locking rod (5) located above the locking block (313), and an adjusting member (6) for controlling the locking rod (5) to slide up and down. The locking block (313) is provided with a locking through hole (3132) communicating with the locking notch (3131). The locking plate (213) is provided with a locking slot (2131) capable of communicating with the locking through hole (3132). Under the action of the adjusting member (6), the end of the locking rod (5) can penetrate the locking through hole (3132) and then be inserted into the locking slot (2131).

9. A metering box with a junction box according to claim 8, characterized in that: The adjusting member (6) includes an elastic reset member (61) for driving the locking rod (5) to slide in a direction away from the locking block (313), the elastic reset member (61) includes a first spring (611), a guide block (612) fixed on the base (31), and a baffle (613) fixed on the outer periphery of the locking rod (5), the guide block (612) is provided with a guide hole for the locking rod (5) to pass through, the baffle (613) is located on the side of the guide block (612) away from the locking block (313), and the two ends of the first spring (611) are respectively fixedly connected to the side surfaces of the guide block (612) and the baffle (613) close to each other.

10. The meter box with junction box according to claim 8, characterized in that: The adjusting member (6) comprises an adjusting rod (62) fixed on the positioning rod (41); and a guiding inclined surface (51) is provided on the edge of the end of the locking rod (5) away from the base (31); When the positioning rod (41) is inserted into the positioning slot (121), the adjusting rod (62) presses the locking rod (5) along the guiding inclined surface (51), so that the locking rod (5) moves downward and is inserted into the locking slot (2131).

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