A pre-wired meter box

Abstract

The application discloses a pre-wired electric meter box and belongs to the technical field of electric meter boxes. The electric meter box comprises an electric meter box body and a wiring box assembled in the electric meter box body. Cables are arranged in the wiring box. A quick mounting unit is assembled on the inner wall of the electric meter box body. The quick mounting unit comprises a back plate fixed to the inner wall of the electric meter box body. A mounting seat is assembled on the front surface of the back plate. A stop piece is inserted into a slot formed on the front surface of the mounting seat to abut against the back plate after the electric energy meter is inserted into the mounting seat. The quick mounting unit and the synchronous unit are arranged to realize screw-free insertion and mounting of the electric energy meter. The replacement time of a single meter is greatly shortened. When a batch of meters are replaced, all the electric energy meters in a row or in the box can be operated at one time through the synchronous unit, thereby avoiding repeated disassembly and assembly of threaded parts. Meanwhile, the fixed wire column is directly adapted to the threaded holes of the existing electric energy meters, and the traditional electric energy meters can be compatible without modification of the equipment.

Description

Technical Field

[0001] This invention relates to the field of meter box technology, and more particularly to a pre-wired meter box. Background Technology

[0002] A pre-wired meter box is a specialized device that pre-completes internal circuit connections and integrates power metering and protection functions. It aims to simplify the installation process, improve power safety, and adapt to the needs of intelligent management.

[0003] Traditional electricity meter installation methods use multi-threaded fasteners for fixing, and the wiring terminals use knob bolts to drive elastic clips to crimp the cables. Although this method can ensure the reliability of mechanical connections, it has significant operational bottlenecks in equipment maintenance scenarios: replacing a single meter requires disassembling and assembling all threaded parts. When the entire meter in the meter box is replaced, the amount of repetitive operations will increase exponentially, leading to a sharp decline in on-site work efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the problem that replacing a single meter requires the complete disassembly and assembly of all threaded parts, and when the entire meter in the meter box is replaced, the amount of repetitive operations increases exponentially, leading to a sharp decline in on-site work efficiency. Therefore, this invention proposes a pre-wired meter box.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pre-wired meter box includes a meter box body and a wiring box assembled inside the meter box body. Cables are run through the wiring box, and a quick-installation unit is assembled on the inner wall of the meter box body.

[0007] The quick-installation unit includes a back plate fixed to the inner wall of the meter box body. The front of the back plate is equipped with a mounting base. The front of the mounting base has a slot for inserting a backing member, so that the electricity meter can be inserted into the mounting base and abut against the back plate.

[0008] It also includes a synchronization unit mounted on the back plate. The synchronization unit includes a screw rotatably connected to the back plate. A synchronization element is threaded onto the screw. The two ends of the synchronization element are respectively connected to two abutment elements, so that the abutment elements move synchronously toward the electricity meter under the drive of the screw.

[0009] As a further description of the above technical solution:

[0010] The abutting component includes a lower abutting plate and an upper abutting plate inserted into the mounting base, and the bottom end of the upper abutting plate is connected to the lower abutting plate by a spring hinge;

[0011] The back of both of the lower top plates are fitted with a crossbeam, and a guide post is fixed to the back of the crossbeam.

[0012] As a further description of the above technical solution:

[0013] A guide rod is inserted into the bottom of the front of the mounting base through a guide groove, and one end of the guide rod extending outside the guide groove is fixed to the back of the lower top plate.

[0014] The guide rod is fitted with a first spring at one end that passes through the guide groove, and one end of the first spring is connected to the inner wall of the guide groove.

[0015] As a further description of the above technical solution:

[0016] The synchronizing component includes a movable component threaded onto a screw, with synchronizing plates engaged at both ends of the movable component via slots. A connecting rod is fitted onto the outer surface of the synchronizing plate, with one end of the connecting rod fixed to a crossbar. A pressure rod is fixed to the center of the front of the synchronizing plate.

[0017] As a further description of the above technical solution:

[0018] A retaining rod is fixed to the back of the synchronization plate, and a retaining sleeve is slidably fitted on the outer surface of the retaining rod. A first limiting groove is provided on the back plate, and one end of the retaining sleeve is slidably connected to the first limiting groove.

[0019] As a further description of the above technical solution:

[0020] A retaining plate is fixed to the bottom of the front of the back plate. A sliding plate is slidably connected to the lower surface of the retaining plate through a second limiting groove. A second spring is fitted to the upper surface of the sliding plate, and the top of the second spring is fixed to the lower surface of the synchronization plate.

[0021] As a further description of the above technical solution:

[0022] A telescopic plate is fixed to the inner wall of the meter box body, a vertical tube is fixed to the telescopic plate, a vertical rod is inserted into the vertical tube, and the top of the vertical rod is fixed to the lower surface of the pressure rod.

[0023] As a further description of the above technical solution:

[0024] The synchronization unit also includes a bearing seat sleeved on the screw, one end of which is fixed to the back plate. Both screws are fixedly sleeved with pulleys, and a synchronization belt is meshed on both pulleys.

[0025] As a further description of the above technical solution:

[0026] Mounting holes are provided on both sides of the lower and upper top plates. A spherical column is connected to the mounting hole through a third spring. A positioning groove that matches the spherical column is provided on the inner side wall of the slot.

[0027] As a further description of the above technical solution:

[0028] The quick-installation unit also includes a wire frame fixed to the lower surface of the mounting base, with one end of the cable passing through the wire frame and connected to the electricity meter.

[0029] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0030] By setting up quick-installation and synchronization units, screwless plug-in installation of electricity meters is realized, which greatly shortens the replacement time of a single meter. When replacing a batch of meters, the synchronization unit can operate the entire row of electricity meters or all electricity meters in the box at one time, avoiding repeated disassembly and assembly of threaded parts.

[0031] Meanwhile, the fixed line post directly adapts to the existing threaded hole of the electricity meter, and can be compatible with traditional electricity meters without the need to modify the equipment;

[0032] The lower and upper top plates, together with spring hinges, allow for one-handed operation to fix and release the energy meter. To disassemble, simply flip down the upper top plate to release the limit.

[0033] The synchronization unit adopts a dual-screw linkage design, which, together with the synchronization belt, enables manual driving of the entire row of energy meters to be released synchronously, significantly improving the overall energy meter replacement efficiency in the meter box.

[0034] Furthermore, the connection stability can be guaranteed. The conductor frame fastening bolts ensure the positioning of the cable end, the fixed post abuts against the terminal slot clamp to achieve electrical connection, and the abutment component mechanically presses to ensure overall stability. Attached Figure Description

[0035] Figure 1 A schematic diagram of the installation position of the quick-installation unit provided according to an embodiment of the present invention is shown;

[0036] Figure 2 A schematic diagram of the structure of the abutment member in its initial state according to an embodiment of the present invention is shown;

[0037] Figure 3 This diagram shows a cross-sectional view of the bottom of the mounting base provided according to an embodiment of the present invention.

[0038] Figure 4 The present invention provides an embodiment of the invention. Figure 2 Enlarged view of point A in the middle;

[0039] Figure 5 A schematic diagram of the disassembled connecting rod provided according to an embodiment of the present invention is shown;

[0040] Figure 6 A schematic diagram of the mounting structure of the retaining sleeve and the back plate according to an embodiment of the present invention is shown;

[0041] Figure 7 This diagram illustrates the structure of the two abutting members provided in an embodiment of the present invention after they are simultaneously moved away from the electricity meter.

[0042] Figure 8 A schematic diagram of the structure of the lower abutment plate provided according to an embodiment of the present invention is shown;

[0043] Figure 9 The present invention provides an embodiment of the invention. Figure 5 Enlarged view of point B in the middle;

[0044] Figure 10 A schematic diagram of the structure of the mounting base provided according to an embodiment of the present invention is shown;

[0045] Figure 11 This diagram illustrates the structure of one of the upper abutment plates after rotation, according to an embodiment of the present invention.

[0046] Figure 12 The present invention provides an embodiment of the invention. Figure 11 Enlarged view of point C in the middle;

[0047] Figure 13 This diagram illustrates the structure of one of the abutting components provided according to an embodiment of the present invention after it is moved away from the electricity meter.

[0048] Figure 14 A schematic diagram of the structure of an energy meter after installation according to an embodiment of the present invention is shown;

[0049] Figure 15 A schematic diagram of the overall structure provided according to an embodiment of the present invention is shown.

[0050] Legend:

[0051] 10. Meter box body;

[0052] 20. Cable management box;

[0053] 30. Cables;

[0054] 40. Quick-install unit; 41. Back plate; 42. Mounting base; 43. Support piece; 431. Lower support plate; 432. Upper support plate; 433. Guide rod; 434. First spring; 435. Cross frame; 436. Wire guide post; 437. Third spring; 438. Spherical column; 44. Wire guide frame;

[0055] 50. Synchronizing unit; 51. Screw; 52. Synchronizing component; 521. Moving component; 522. Synchronizing plate; 523. Connecting rod; 524. Pressure rod; 525. Holding rod; 526. Holding sleeve; 527. Holding plate; 528. Slide plate; 529. Second spring; 5210. Telescopic plate; 53. Pulley; 54. Synchronizing belt. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0057] like Figure 1 - Figure 15 As shown, the present invention provides:

[0058] A pre-wired meter box includes a meter box body 10 and a wiring box 20 assembled inside the meter box body 10. Cables 30 are threaded through the wiring box 20, and a quick-installation unit 40 is assembled on the inner wall of the meter box body 10.

[0059] The quick-installation unit 40 includes a back plate 41 fixed to the inner wall of the meter box body 10. A mounting base 42 is fitted on the front of the back plate 41. A pusher 43 is inserted into the front of the mounting base 42 through a slot, so that the electricity meter can be inserted into the mounting base 42 and push against the back plate 41.

[0060] The quick-installation unit 40 also includes a wire frame 44 fixed to the lower surface of the mounting base 42. One end of the cable 30 passes through the wire frame 44 and is connected to the energy meter. Preferably, the front of the wire frame 44 is threaded with a fastening bolt. During pre-wiring, after the cable 30 passes through the wire frame 44, the fastening bolt is tightened to fix the cable 30 inside the wire frame 44, thereby keeping the position of the conductive contact at the end of the cable 30 stationary.

[0061] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the abutment 43 includes a lower abutment plate 431 and an upper abutment plate 432 inserted into the mounting base 42. The bottom end of the upper abutment plate 432 is connected to the lower abutment plate 431 by a spring hinge.

[0062] Mounting holes are provided on both sides of the lower top plate 431 and the upper top plate 432. A spherical column 438 is connected to the mounting hole through a third spring 437. A positioning groove that matches the spherical column 438 is provided on the inner side wall of the slot.

[0063] The back of the two lower top plates 431 are jointly fitted with a crossbeam 435, and a guide post 436 is fixed to the back of the crossbeam 435.

[0064] Specifically, in the existing known technology, a bolt is threadedly connected to the bottom of the front of the electricity meter at the position corresponding to the wiring slot through a threaded hole. When the wire is connected into the wiring slot, the clamp of the wiring slot is pressed against the wire by tightening the bolt, thereby fixing the wire in the wiring slot. The fixing post 436 is adapted to the threaded hole and is used to replace the bolt, so that the electricity meter can be used without adaptation modifications. In particular, the end of the cable 30 is fixed with a conductive contact adapted to the wiring slot on the electricity meter.

[0065] When installing the electricity meter, the meter is moved downward from above the mounting base 42, so that the conductive contact at the end of the cable 30 is inserted into the wiring groove at the bottom of the meter. At this time, the synchronization unit 50 drives the lower abutment plate 431 and the upper abutment plate 432 to gradually move towards the side of the meter and abut against the surface of the meter, so that the meter is fixed in the mounting base 42. During this process, the crossbar 435 also moves together, so that the fixing post 436 is gradually inserted into the threaded hole at the bottom of the front of the meter. After the back plate 41 abuts against the meter, the end of the fixing post 436 abuts against the clamp in the wiring groove, so that the clamp abuts against the conductive contact, thereby fixing the conductive contact in the wiring groove, thus ensuring stability during use.

[0066] like Figure 3 As shown, a guide rod 433 is inserted into the bottom of the front of the mounting base 42 through a guide groove. One end of the guide rod 433 extending outside the guide groove is fixed to the back of the lower top plate 431. A first spring 434 is fitted into one end of the guide rod 433 that passes through the guide groove. One end of the first spring 434 is connected to the inner wall of the guide groove.

[0067] Specifically, when the lower abutment plate 431 and the upper abutment plate 432 move with the synchronizing member 52 to abut against the front of the energy meter, the first spring 434 is in a compressed state. When the abutment state is released, under the force of the first spring 434, the lower abutment plate 431, the upper abutment plate 432 and the crossbar 435 gradually move away from the energy meter, thereby releasing the abutment and fixing of the energy meter and the conductive contacts, so that the energy meter can be easily removed upwards.

[0068] like Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, it also includes a synchronization unit 50 mounted on the back plate 41. The synchronization unit 50 includes a screw 51 rotatably connected to the back plate 41. A synchronization element 52 is threaded on the screw 51. The two ends of the synchronization element 52 are respectively connected to two abutment elements 43, so that the abutment elements 43 are driven by the screw 51 to move synchronously toward the energy meter.

[0069] Synchronization unit 50 also includes a bearing seat sleeved on the screw 51. One end of the bearing seat is fixed to the back plate 41. Pulleys 53 are fixedly sleeved on both screws 51. Synchronization belt 54 is meshed on both pulleys 53.

[0070] In more detail, the synchronizing component 52 includes a movable component 521 threaded onto the screw 51. Both ends of the movable component 521 are connected to the synchronizing plate 522 by opening slots. A connecting rod 523 is sleeved on the outer surface of the synchronizing plate 522. One end of the connecting rod 523 is fixed to the crossbeam 435. A pressure rod 524 is fixed in the middle of the front side of the synchronizing plate 522.

[0071] A retaining rod 525 is fixed on the back of the synchronization plate 522. A retaining sleeve 526 is slidably sleeved on the outer surface of the retaining rod 525. A first limiting groove is provided on the back plate 41. One end of the retaining sleeve 526 is slidably connected in the first limiting groove.

[0072] A retaining plate 527 is fixed to the bottom of the front of the back plate 41. The lower surface of the retaining plate 527 is slidably connected to the slide plate 528 through the opening of the second limiting slide groove. The upper surface of the slide plate 528 is equipped with a second spring 529. The top of the second spring 529 is fixed to the lower surface of the synchronization plate 522.

[0073] A telescopic plate 5210 is fixed on the inner wall of the meter box body 10. A vertical pipe is fixed on the telescopic plate 5210. A vertical rod is inserted into the vertical pipe. The top of the vertical rod is fixed to the lower surface of the pressure rod 524.

[0074] Specifically, after the lower abutment plate 431 and the upper abutment plate 432 abut against the energy meter, the spherical columns 438 on the lower abutment plate 431 and the upper abutment plate 432 are engaged in the corresponding positioning slots. In this state, the elastic force generated by the compressed first spring 434 is less than the elastic force of the third spring 437 at this time, so that even after the synchronous plate 522 is pushed down to separate from the slot, the first spring 434 will not drive the guide rod 433 to move outward. Thus, even if the connecting rod 523 and the moving part 521 are no longer connected after the abutment plate abuts against the energy meter, the abutment plate will always remain against the energy meter, keeping the energy meter in position.

[0075] When only one of the energy meters is disassembled and replaced, the corresponding upper abutment plate 432 is rotated to gradually rotate to a horizontal state. During this process, it gradually abuts against the pressure rod 524, thereby driving it to move downward. During the downward movement, the corresponding synchronous plate 522 moves downward, releasing the connection with the corresponding connecting rod 523. At this time, the upper abutment plate 432 is pulled outward, causing the spherical column 438 to move out of the positioning groove. Due to the action of the spherical surface, when pulled outward, the spherical surface abuts against the inner wall of the positioning groove, and gradually drives the spherical column 438 to move inward and retract into the mounting hole. At this time, due to the action of the first spring 434, the lower abutment plate 431, the upper abutment plate 432, and the crossbeam 435 gradually move away from the energy meter, releasing the abutment against the energy meter and conductive contacts. At this time, the energy meter can be easily moved upward, and then the new energy meter is placed in the corresponding position. After being placed, it is kept in the state of the upper abutment plate 432 pressing down the pressure rod 524.

[0076] Then, the upper abutment plate 432 is pushed inward, causing the lower abutment plate 431 and the cross frame 435 to move inward simultaneously, so that the lower abutment plate 431 and the cross frame 435 abut against the energy meter, and the fixed line post 436 abuts against the conductive contact inserted into the energy meter, fixing it in the wiring slot of the energy meter. In this state, the spherical post 438 on the lower abutment plate 431 is inserted into the corresponding positioning slot. Then, the upper abutment plate 432 is reset to a vertical state, so that the spherical post 438 on it is inserted into the corresponding positioning slot. At this time, the positions of the lower abutment plate 431 and the upper abutment plate 432 are fixed. During the reset process of the upper abutment plate 432, the abutment against the pressure rod 524 is gradually released, so that the previously separated synchronous plate 522 is reset upward under the action of the second spring 529 and re-inserted into the slot, so that the separated connecting rod 523 is reconnected with the moving part 521.

[0077] When it is necessary to replace both electricity meters in the same row, first remove the timing belt 54, rotate the corresponding screw 51, and move the moving part 521 outward along with the connecting rods 523 on both sides. This causes the lower top plate 431, upper top plate 432, and crossbeam 435 in the same row to gradually move away from the electricity meter, releasing the restriction on the electricity meter and allowing it to be taken out upward. When it is necessary to replace all the electricity meters, it is not necessary to remove the timing belt 54. Then, simply drive one of the screws 51 to rotate.

[0078] Specifically, this pre-wired meter box will operate / be in use as follows:

[0079] Installation process:

[0080] 1. Pre-wiring preparation: Insert cable 30 into conductor frame 44, tighten the fastening bolts to fix cable 30, and pre-install conductive contacts at the end of cable 30.

[0081] 2. Inserting the electricity meter: Hold the electricity meter and align the bottom wiring slot with the conductive contact. Insert it into the mounting base 42 from top to bottom. The conductive contact will automatically connect to the wiring slot.

[0082] 3. Synchronous fixing operation: Rotate any screw 51, and the twin screws 51 will rotate in conjunction with the synchronous belt 54, driving the synchronous component 52 (including the moving component 521 and the synchronous plate 522) to move horizontally;

[0083] Synchronizing component 52 pulls the abutting component 43 towards the surface of the electricity meter via connecting rod 523. When the lower abutting plate 431 and the upper abutting plate 432 abut the surface of the electricity meter, the spherical column 438 is inserted into the positioning groove, and the fixing column 436 is fully inserted into the threaded hole and abuts the clamping piece, thus completing the double fixation of electromechanical components.

[0084] Single form replacement process:

[0085] 1. Release the single meter fixation; flip down the upper abutment plate 432 corresponding to the electricity meter to be replaced to a horizontal state, the pressure rod 524 moves down under pressure, the synchronous plate 522 separates from the moving part 521, then pull the upper abutment plate 432 horizontally outward, the spherical column 438 disengages from the positioning groove, the first spring 434 drives the abutment part 43 to automatically retract, releasing the electricity meter fixation.

[0086] 2. Replace with a new meter: After removing the old meter, insert the new meter while keeping the upper abutment plate 432 pressed down. The conductive contacts will automatically connect, push the upper abutment plate 432 to reset, and the spherical column 438 will re-enter the positioning groove. The synchronous plate 522 will automatically connect with the moving part 521 under the action of the second spring 529.

[0087] Batch replacement process for the entire row:

[0088] 1. Disconnect synchronous linkage: Remove synchronous belt 54 and disconnect the linkage relationship of twin screws 51.

[0089] 2. Loosening operation of the entire row: Rotate the target row screw 51 in the opposite direction, and the moving part 521 drives the synchronous plate 522 to move outward, and the connecting rod 523 pulls the abutment part 43 away from the energy meter as a whole.

[0090] 3. Replacement and installation of the whole row: After inserting the new energy meter, rotate the screw 51 in the forward direction to fix the whole row. Reinstall the synchronous belt 54 to restore the linkage function. It is worth noting that when it is necessary to replace all the energy meters in the box, it is not necessary to disconnect the synchronous linkage. The above operation can be completed by rotating one of the screws 51 while maintaining the linkage.

[0091] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A pre-wired meter box comprising a meter box body (10) and a wiring box (20) assembled in the meter box body (10), a cable (30) being threaded in the wiring box (20), characterized in that, The meter box body (10) is equipped with a quick-installation unit (40) on its inner wall. The quick-installation unit (40) includes a back plate (41) fixed to the inner wall of the meter box body (10). The front of the back plate (41) is equipped with a mounting base (42). The front of the mounting base (42) is connected to a backing member (43) through a slot, so that the electricity meter is inserted into the mounting base (42) and abuts against the back plate (41). It also includes a synchronization unit (50) mounted on the back plate (41). The synchronization unit (50) includes a screw (51) rotatably connected to the back plate (41). A synchronization element (52) is threaded on the screw (51). The two ends of the synchronization element (52) are respectively connected to two abutment elements (43), so that the abutment elements (43) move synchronously toward the electricity meter under the drive of the screw (51). The abutment (43) includes a lower abutment plate (431) and an upper abutment plate (432) inserted into the mounting base (42). The bottom end of the upper abutment plate (432) is connected to the lower abutment plate (431) by a spring hinge. The back of the two lower abutment plates (431) is equipped with a crossbeam (435). The back of the crossbeam (435) is fixed with a guide post (436). The synchronizing component (52) includes a movable component (521) threaded onto a screw (51). Both ends of the movable component (521) are connected to a synchronizing plate (522) through slots. A connecting rod (523) is sleeved on the outer surface of the synchronizing plate (522). One end of the connecting rod (523) is fixed to the crossbar (435). A pressure rod (524) is fixed in the middle of the front side of the synchronizing plate (522).

2. A pre-wired meter box according to claim 1, wherein, The bottom of the front of the mounting base (42) is connected to a guide rod (433) by opening a guide groove. One end of the guide rod (433) extending outside the guide groove is fixed to the back of the lower top plate (431). The guide rod (433) is fitted with a first spring (434) at one end that passes into the guide groove, and one end of the first spring (434) is connected to the inner wall of the guide groove.

3. A pre-wired meter box according to claim 1, wherein, A retaining rod (525) is fixed on the back of the synchronization plate (522). A retaining sleeve (526) is slidably sleeved on the outer surface of the retaining rod (525). A first limiting groove is provided on the back plate (41). One end of the retaining sleeve (526) is slidably connected in the first limiting groove.

4. A pre-wired meter box according to claim 3, wherein, A retaining plate (527) is fixed to the bottom of the front of the back plate (41). A sliding plate (528) is slidably connected to the lower surface of the retaining plate (527) through a second limiting groove. A second spring (529) is mounted on the upper surface of the sliding plate (528). The top of the second spring (529) is fixed to the lower surface of the synchronization plate (522).

5. A pre-wired meter box according to claim 4 wherein, A telescopic plate (5210) is fixed on the inner wall of the main body (10) of the meter box. A vertical tube is fixed on the telescopic plate (5210). A vertical rod is inserted into the vertical tube. The top of the vertical rod is fixed to the lower surface of the pressure rod (524).

6. A pre-wired meter box according to claim 1, wherein, The synchronous unit (50) further comprises a bearing seat sleeved on the screw rod (51), one end of the bearing seat is fixed with the back plate (41), two screw rods (51) are fixedly sleeved with a belt wheel (53), and the two belt wheels (53) are jointly meshed and connected with a synchronous belt (54).

7. A pre-wired meter box according to claim 2 wherein, The lower and upper abutting plates (431 and 432) are provided with mounting holes on both sides, the mounting holes are connected with spherical columns (438) through third springs (437), and the inner side walls of the insertion grooves are provided with positioning grooves matched with the spherical columns (438).

8. A pre-wired meter box according to claim 1, wherein, The quick mounting unit (40) further comprises a wire guide (44) fixed to the lower surface of the mounting seat (42), and one end of the cable (30) penetrates through the wire guide (44) and is connected with the electric energy meter.

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