Pre-buried single-phase multi-metering position electric energy metering box

Abstract

The application relates to the technical field of electric energy metering boxes, in particular to a pre-embedded single-phase multi-meter-position electric energy metering box which comprises a fixed protective cover plate, an outer box body, an inner box main body and a limiting partition plate, the inner box main body is arranged in the inner portion of the outer box body, the fixed protective cover plate is fixedly connected to the upper end of the outer box body through bolts, the limiting partition plate is fixedly connected between the two ends of the outer box body and the inner box main body through bolts, and a first wire slot is arranged in the middle portion of the upper end of the outer box body. The outer box body self-adapting adjusting structure solves the adaptability problem caused by the size deviation of the embedded groove during pre-embedded installation, significantly improves the installation precision and construction convenience, can effectively prevent the wire body from falling off or being damaged due to accidental pulling during wiring construction or later use, and cooperates with a forced air cooling heat dissipation system to guarantee the long-term stable operation of the metering box.

Description

Technical Field

[0001] This invention relates to the field of electricity metering box technology, specifically a pre-embedded single-phase multi-meter-position electricity metering box. Background Technology

[0002] Electricity metering boxes are protective devices used in various stages of a power system, including power generation, transmission, transformation, distribution, and consumption. They are an important component for ensuring electrical safety and maintaining equipment performance. For power connections in public places or multi-household residences, single-phase multi-meter metering boxes are typically used. Currently, most single-phase multi-meter metering boxes on the market use traditional wire connection methods, resulting in messy wiring inside the box. Multiple meters can easily lead to tangled and messy wires, which not only hinders wiring but can also cause loose connections in severe cases, affecting the collection of meter data. Furthermore, electricity metering boxes require pre-set embedding trenches in the building for installation. The existing electricity metering boxes are secured inside the burial trench using bolts and other frames and concrete. However, they cannot be fully fitted into the trench during installation, requiring adjustments to the trench space. Furthermore, the existing boxes do not allow for convenient and quick testing and installation of the electrical equipment and instruments inside. Additionally, the heat inside the buried box is difficult to dissipate, leading to high temperatures that are detrimental to the long-term stable operation and use of the electrical equipment and instruments. Therefore, a pre-embedded single-phase multi-position electricity metering box is needed to solve these problems. Summary of the Invention

[0003] To address the problems in the existing technology, the present invention provides a pre-embedded single-phase multi-position energy metering box.

[0004] The technical solution adopted by this invention to solve its technical problem is: a pre-embedded single-phase multi-position energy metering box, including a fixed protective cover, an outer box, an inner box body, and a limiting baffle. The inner box body is disposed inside the outer box. The fixed protective cover is fixedly connected to the upper end of the outer box by bolts. The limiting baffle is fixedly connected between the two ends of the outer box and the inner box body by bolts. A first cable tray is formed through the middle of the upper end of the outer box. Sliding slots are evenly formed inside the two ends of the outer box. A cable routing slot is formed in the middle of the bottom end of the outer box. A first cable routing hole is evenly formed at the bottom of the outer box, and the first cable routing hole communicates with the cable routing slot.

[0005] Specifically, mounting plates are fixedly installed on both sides of the outer casing, and exhaust fans are evenly fixedly installed on the mounting plates. An exhaust pipe is fixedly connected to the outer end of the exhaust fan.

[0006] Specifically, second limiting baffles are symmetrically fixedly installed at both ends of the outer casing, and the second limiting baffles are distributed on the outer sides of both ends of the outer casing. Positioning detection rings are symmetrically fixedly installed at both ends of the outer casing, and the positioning detection rings are located on the inner side of the middle of the second limiting baffles. Side adjustment protective plates are provided on both sides of the outer casing. Sliding adjustment plates are fixedly connected to both sides of the side adjustment protective plates, near the outer casing, and the sliding adjustment plates are slidably engaged inside the side ends of the outer casing. Buffer adjustment springs are evenly fixedly installed between the inner side of the side adjustment protective plates and the outer ends of the outer casing using bolts and fixing discs. Fixed installation holes are evenly provided through both sides of the side adjustment protective plates. A threaded adjusting rod is fixedly installed at both ends of the side adjustment protective plate and at the middle of the side closest to the outer casing. A detection column is fixedly installed at the middle of the side end of the threaded adjusting rod away from the side adjustment protective plate. The detection column is evenly provided with scale lines. The detection column and the threaded adjusting rod pass through the middle of the second limiting baffle. There is a gap between the outside of the threaded adjusting rod and the detection column and the second limiting baffle. The detection column is evenly provided with scale lines and is inserted into the inside of the positioning detection ring. The adjusting nut is threadedly rotatably mounted on the threaded adjusting rod and is located at the side end of the second limiting baffle away from the side adjustment protective plate. The adjusting nut is pressed and fitted against the outer wall of the second limiting baffle.

[0007] Specifically, the inner box body includes a second cable tray, an inner box body, a sliding plate, heat dissipation holes, a protective door, a second cable routing hole, a wiring protection part, and a partition adjustment part. The second cable tray is opened through the middle of the upper end of the inner box body. The sliding plate is evenly and fixedly installed at both ends of the inner box body. The heat dissipation holes are evenly opened on both sides of the inner box body. The protective door is rotatably installed on the outside of the inner box body. The partition adjustment part is located inside the inner box body. The second cable routing hole is evenly opened through the bottom end of the inner box body. The wiring protection part is located inside the bottom end of the inner box body and is located above the second cable routing hole.

[0008] Specifically, the partition adjustment unit includes a track adjustment plate, locking bolts, a second sliding adjustment plate, a mounting frame, a fixed connecting plate, a second fixed mounting hole, a first side partition plate, a limiting support plate, and a rotating partition shaft. The track adjustment plates are symmetrically distributed. The fixed connecting plate is fixedly connected to both ends of the track adjustment plate by bolts. The second sliding adjustment plate is symmetrically slidably engaged with the track adjustment plate. The mounting frame is fixedly connected to the outer end of the second sliding adjustment plate. The second fixed mounting hole is evenly distributed through the mounting frame. The limiting support plates are symmetrically distributed on the outer side of the track adjustment plate. The rotating partition shaft is symmetrically rotatably mounted between the limiting support plates. The first side partition plate is symmetrically fixedly mounted on the rotating partition shaft.

[0009] Specifically, the wiring protection unit includes a second side baffle, a winding rod, a baffle limiting plate, a detection spring, a sliding detection plate, a limiting column, and a pressure sensor. The limiting columns are arranged in a mirror-symmetrical manner. The baffle limiting plate is fixedly installed at both ends of the limiting column. The sliding detection plate is slidably engaged in the limiting column and is located in the middle of the limiting column. The detection spring is arranged between the two sides of the sliding detection plate and the baffle limiting plate. The pressure sensor is located between the baffle limiting plate and the detection spring. The winding rod is rotatably engaged in the middle of the sliding detection plate. The second side baffle is symmetrically fixedly installed on the winding rod.

[0010] Specifically, the bottom of the limiting column is fixedly connected to the bottom of the inner box and located outside the second wiring hole, while the track adjustment plate and the limiting support plate are fixedly connected to the inside of the inner box.

[0011] Specifically, the sliding plate is slidably engaged inside the sliding slot, a side plate is fixedly provided between the inner box and the side end of the outer box, a pull handle is symmetrically fixedly installed on the outer side of the side plate, and the discharge pipe is inserted through the side plate.

[0012] Specifically, the side of the exhaust fan away from the exhaust pipe is located outside the heat dissipation hole, the limiting baffle is positioned between the outer and inner housings, the first cable tray is aligned with the second cable tray, and the fixed protective cover is fixedly installed on the second limiting baffle by bolts.

[0013] Specifically, an alarm is installed on one side of the outer casing, and the number of alarms is the same as the number of wiring protection parts.

[0014] The beneficial effects of this invention are:

[0015] I. This invention adopts an adaptive adjustment structure for the outer casing, which solves the compatibility problem caused by the size deviation of the embedding groove during pre-embedded installation, significantly improving installation accuracy and construction convenience. By setting retractable side adjustment protective plates on both sides of the outer casing, in conjunction with threaded adjustment rods, adjustment nuts, detection columns and scale lines, operators can turn the adjustment nuts according to the actual embedding groove size to drive the side adjustment protective plates to move outward or inward. At the same time, the buffer adjustment spring provides auxiliary support force, so that the outer casing can be tightly and horizontally fixed in the pre-embedded grooves of different specifications. The scale lines on the detection column cooperate with the positioning detection ring to intuitively display the adjustment displacement on both sides, ensuring that the movement distance of the two ends of the side adjustment protective plate is the same and does not produce tilting. This achieves precise adaptation between the casing and the embedding groove, reduces construction difficulty and improves installation quality.

[0016] II. This invention, through its sliding pull-out structure of the inner casing and adjustable equipment mounting frame, greatly facilitates the installation, inspection, and maintenance of internal electrical equipment and instruments. It also achieves neat cable routing and buffered guidance. The inner casing slides with a sliding plate in the sliding groove of the outer casing and can be locked in position by a limiting baffle and a side plate. When maintenance is required, simply remove the side plate to pull the inner casing outwards along the sliding groove, fully exposing it for easy equipment replacement, wiring checks, and other operations. After maintenance, it can be pushed back into its original position. The inner casing also features an adjustable baffle section, allowing the mounting frame to slide on the track adjustment plate and be locked in position by locking bolts. This allows for flexible adaptation to electrical equipment and instruments of different sizes. Cables are guided by the rotating baffle shaft and the first side baffle, achieving neat, buffered, and redirected cabling, avoiding the risks of messy cable tangling and loose connections.

[0017] Third, this invention effectively prevents accidental pulling during wiring construction or subsequent use from causing the cable to detach or be damaged. Simultaneously, in conjunction with a forced air-cooling system, it ensures the long-term stable operation of the metering box. The wiring protection section at the bottom of the inner box includes a winding rod, a sliding detection plate, a detection spring, and a pressure sensor. Before being led out, the cable is pre-wound onto the winding rod to form a redundant length. During normal dragging, the winding rod rotates to release the cable, without generating direct tension on the connection end. When the redundant cable is exhausted and dragging continues, the cable exerts downward pressure on the winding rod, pushing the sliding detection plate to compress the detection spring and move it downwards instantly. The pressure sensor detects a significant change in pressure value and immediately triggers the corresponding alarm via the PLC controller, prompting the operator to stop dragging. This eliminates the potential for the cable to disconnect from the equipment or be damaged due to violent pulling. The exhaust fans on both sides of the outer box are aligned with the heat dissipation holes on the inner box side wall, forcibly expelling hot air from the box through the exhaust pipe, achieving efficient convection cooling and preventing internal high temperatures from affecting the metering accuracy and service life of electrical equipment and instruments. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional structural diagram of the main body of the present invention;

[0020] Figure 2 This is a schematic diagram of the main protective door in the open state in this invention;

[0021] Figure 3 This is a schematic diagram of the outer casing structure in this invention;

[0022] Figure 4 This is a schematic diagram of the internal structure of the outer casing in this invention;

[0023] Figure 5 This is a schematic diagram of the structure on both sides of the outer casing in this invention;

[0024] Figure 6 This is a schematic diagram of the main structure of the inner box in this invention;

[0025] Figure 7 This is a schematic diagram of the internal structure of the inner box body in this invention;

[0026] Figure 8 This is a schematic diagram of the partition adjustment part in the present invention;

[0027] Figure 9 This is a schematic diagram of the wiring protection section in this invention.

[0028] In the diagram: 1-Fixed protective cover, 2-Outer casing, 3-Inner casing body, 4-Limiting baffle, 5-First cable tray, 6-Exhaust fan, 7-Drain pipe, 8-Pull handle, 9-Fixed mounting plate, 10-Side retaining plate, 11-Sliding slot, 12-First cable routing hole, 13-Cable tray, 14-Adjusting nut, 15-Positioning detection ring, 16-Scale line, 17-Second limiting baffle, 18-Detection column, 19-Threaded adjusting rod, 20-Side adjusting protective plate, 21-Fixed mounting hole, 22-Sliding adjusting retaining plate, 23-Buffer adjusting spring, 24-Second cable tray, 25 - Inner casing, 26- Sliding plate, 27- Heat dissipation hole, 28- Protective door, 29- Second cable routing hole, 30- Wiring protection part, 31- Baffle adjustment part, 32- Track adjustment plate, 33- Locking bolt, 34- Second sliding adjustment plate, 35- Mounting frame, 36- Fixed connection plate, 37- Second fixed mounting hole, 38- First side baffle, 39- Limiting support plate, 40- Rotating baffle shaft, 41- Second side baffle, 42- Winding rod, 43- Baffle limiting plate, 44- Detection spring, 45- Sliding detection plate, 46- Limiting column, 47- Pressure sensor. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0030] The invention will be further described below with reference to the accompanying drawings.

[0031] like Figures 1-5As shown, a pre-embedded single-phase multi-position energy metering box of the present invention includes a fixed protective cover plate 1, an outer casing 2, an inner casing body 3, and a limiting baffle plate 4. The inner casing body 3 is disposed inside the outer casing 2. The fixed protective cover plate 1 is fixedly connected to the upper end of the outer casing 2 by bolts. The limiting baffle plate 4 is fixedly connected between the two ends of the outer casing 2 and the inner casing body 3 by bolts. A first cable tray 5 is provided through the middle of the upper end of the outer casing 2. Sliding slots 11 are evenly provided inside both ends of the outer casing 2. A cable routing groove 13 is provided in the middle of the bottom end of the outer casing 2. A first cable routing hole 12 is evenly provided at the bottom of the outer casing 2, and the first cable routing hole 12 communicates with the cable routing groove 13. Fixed mounting plates 9 are fixedly installed inside both sides of the outer casing 2. A suction fan 6 is evenly fixedly installed on plate 9. A discharge pipe 7 is fixedly connected to the outer end of the suction fan 6. Second limiting baffles 17 are symmetrically fixedly installed at both ends of the outer casing 2, and the second limiting baffles 17 are distributed on the outer sides of both ends of the outer casing 2. Positioning detection rings 15 are symmetrically fixedly installed at both ends of the outer casing 2, and the positioning detection rings 15 are located on the inner side of the middle of the second limiting baffles 17. Side adjustment protective plates 20 are provided on both sides of the outer casing 2. Sliding adjustment plates 22 are fixedly connected to both sides of the side adjustment protective plates 20 and the side closest to the outer casing 2. The sliding adjustment plates 22 are slidably engaged inside the side end of the outer casing 2. Buffer adjustment springs 23 are evenly fixedly installed on the inner side of the side adjustment protective plates 20 and the outer side of the outer casing 2 by bolts and fixing plates. Between the ends, fixed mounting holes 21 are evenly provided on both sides of the side adjustment protective plate 20. Threaded adjusting rods 19 are fixedly installed at the middle of the side of the side adjustment protective plate 20 closest to the outer casing 2. Detection posts 18 are fixedly installed at the middle of the side end of the threaded adjusting rod 19 away from the side adjustment protective plate 20. Scale lines 16 are evenly provided on the detection posts 18. The detection posts 18 and threaded adjusting rods 19 pass through the middle of the second limiting baffle 17, and there is a gap between the outside of the threaded adjusting rods 19 and the detection posts 18 and the second limiting baffle 17. Scale lines 16 are evenly provided on the detection posts 18. The detection posts 18 are inserted into the interior of the positioning detection ring 15. Adjusting nuts 14 are threadedly rotated on the threaded adjusting rods 19, and the adjusting nuts 14 are positioned... At the side end of the second limiting baffle 17 opposite to the side adjusting protective plate 20, the adjusting nut 14 is pressed and fitted against the outer wall of the second limiting baffle 17. Depending on the size of the preset embedding groove, by turning the adjusting nut 14 and with the outward supporting force of the buffer adjusting spring 23, the sliding adjusting plate 22 set at the side end of the side adjusting protective plate 20 can be controlled to slide and extend on both sides of the outer box 2, adjusting and controlling the position of the side adjusting protective plates 20 on both sides of the outer box 2. This allows the side adjusting protective plates 20 on both sides of the outer box 2 to be adjusted and extended, so that the outer box 2 can be fitted and fixedly installed in the preset embedding groove. Furthermore, when the threaded adjusting rod 19 is controlled to extend and retract inside the second limiting baffle 17 by turning each adjusting nut 14,By moving the scale line 16 on the detection column 18 to the same position within the positioning detection ring 15, the ends of the side adjustment protective plates 20 on both sides of the outer casing 2 move the same distance as the sides of the outer casing 2. This ensures that the side adjustment protective plates 20 on the sides of the outer casing 2 remain level with the outer casing 2 after adjustment, facilitating installation. The inner casing body 3 can be easily slid out from the outer casing 2, facilitating safe maintenance of internal electrical equipment and instruments. When feeding cables into the casing through the first cable tray 5, redundant cables can be reserved between the outer casing 2 and the fixed protective cover 1.

[0032] like Figures 6-7 As shown, the inner casing 3 includes a second cable tray 24, an inner casing 25, a sliding plate 26, heat dissipation holes 27, a protective door 28, a second cable routing hole 29, a cable protection part 30, and a partition adjustment part 31. The second cable tray 24 is opened through the middle of the upper end of the inner casing 25. The sliding plate 26 is evenly fixedly installed at both ends of the inner casing 25. The heat dissipation holes 27 are evenly opened on both sides of the inner casing 25. The protective door 28 is rotatably installed on the outside of the inner casing 25. The partition adjustment part 31 is located inside the inner casing 25. The second cable routing hole 29 is evenly opened through the bottom end of the inner casing 25. The cable protection part 30 is located inside the bottom end of the inner casing 25 and is located above the second cable routing hole 29. The heat dissipation holes 27 facilitate rapid heat dissipation.

[0033] like Figure 8 As shown, the partition adjustment part 31 includes a track adjustment plate 32, locking bolts 33, a second sliding adjustment plate 34, a mounting frame 35, a fixed connecting plate 36, a second fixed mounting hole 37, a first side partition plate 38, a limiting support plate 39, and a rotating partition shaft 40. The track adjustment plates 32 are symmetrically distributed. The fixed connecting plate 36 is fixedly connected to both ends of the track adjustment plate 32 by bolts. The second sliding adjustment plate 34 is symmetrically slidably engaged with the track adjustment plate 32. The mounting frame 35 is fixedly connected to the outer end of the second sliding adjustment plate 34. The second fixed mounting holes 37 are evenly distributed through the mounting frame 35. The limiting support plates 39 are symmetrically distributed on the outer side of the track adjustment plate 32. The rotating partition shaft 40 is symmetrically mounted between the limiting support plates 39. The first side partition plate 38 is symmetrically fixedly mounted on the rotating partition shaft 40. The equipment and instruments can be easily installed through the set mounting frame 35 and the second fixed mounting hole 37 on it. The second sliding adjustment plate 34 can slide along the track adjustment plate 32 by turning the locking bolt 33 to adjust and control the position of the mounting frame 35, which is convenient for the installation and use of equipment and instruments of different sizes. The wires connected to the equipment and instruments are connected by winding through the partitions of the rotating partition shaft 40 and the first side partition plate 38 to achieve wiring buffer and direction change connection, so that the wires can be neatly distributed on the rotating partition shaft 40.

[0034] like Figure 9 As shown, the wiring protection unit 30 includes a second side baffle 41, a winding rod 42, a baffle limiting plate 43, a detection spring 44, a sliding detection plate 45, a limiting post 46, and a pressure sensor 47. The limiting posts 46 are arranged in a mirror-symmetrical manner. The baffle limiting plate 43 is fixedly installed at both ends of the limiting posts 46. The sliding detection plate 45 is slidably engaged in the limiting posts 46, and the sliding detection plate 45 is located in the middle of the limiting posts 46. The detection spring 44 is provided with... The sliding detection plate 45 is positioned between the two sides of the partition limit plate 43, and the pressure sensor 47 is located between the partition limit plate 43 and the detection spring 44. The winding rod 42 is rotatably engaged between the middle of the sliding detection plate 45. The second side partition plate 41 is symmetrically fixedly installed on the winding rod 42. The bottom of the limiting column 46 is fixedly connected to the bottom of the inner box 25 and is located outside the second cable routing hole 29. The track adjustment plate 32 and the limiting support plate 39 are fixedly connected to the inner box. Inside the body 25, the wire is wound around the take-up bar 42 and then discharged through the second row of wire holes 29 at the bottom. During the wire pulling process, the redundant wire wound on the take-up bar 42 can be released as the take-up bar 42 rotates, realizing the buffer protection function during the wiring process. When all the redundant wire wound on the take-up bar 42 has been pulled out, the wire pulling again will press the upper part of the take-up bar 42, causing the sliding detection plate 45 to compress the detection spring 44 at the bottom and move downward on the limit column 46 momentarily. At this time, the pressure value detected by the pressure sensor 47 changes significantly, and the detection information is transmitted to the PLC controller set inside the inner box 25, and the alarm is activated, making the wire pulling process safe and preventing the wire from being disconnected from the equipment and instruments in the inner box 25. At the same time, the wiring protection part 30 also makes the wiring inside the inner box 25 neat and tidy.

[0035] The sliding plate 26 is slidably engaged inside the sliding slot 11. A side plate 10 is fixedly installed between the inner box 25 and the side end of the outer box 2. A pull handle 8 is symmetrically fixedly installed on the outer side of the side plate 10, and the discharge pipe 7 is inserted through the side plate 10. The side plate 10 can be easily removed from between the inner box 25 and the side end of the outer box 2 by pulling the handle 8, which facilitates the inspection and replacement of each exhaust fan 6 inside.

[0036] The exhaust fan 6 is located on the outside of the heat dissipation hole 27 on the side opposite to the exhaust pipe 7. It can extract and discharge the heat in the inner box 25 to the outside through the heat dissipation hole 27. The limiting baffle 4 is positioned between the outer box 2 and the inner box 25, so that the inner box 25 can be stably set in the outer box 2. The first cable tray 5 and the second cable tray 24 are aligned. The fixed protective cover 1 is fixedly installed on the second limiting baffle 17 with bolts for easy disassembly.

[0037] An alarm is installed on one side of the outer casing 2, and the number of alarms is the same as the number of wiring protection parts 30. The alarms and wiring protection parts 30 are numbered the same. When the wire wrapped on a wiring protection part 30 is pulled straight and taut, the corresponding alarm will sound, which will play an automatic alarm role during the wiring process.

[0038] Working principle: When the outer casing 2 is pre-embedded in the pre-set embedding groove of the building wall, by turning the adjusting nut 14, the threaded adjusting rod 19 is driven to move telescopically within the second limiting baffle 17. The threaded adjusting rod 19 drives the detection column 18 to insert into the positioning detection ring 15. At the same time, the side adjusting protective plate 20 moves outward or inward under the auxiliary support of the buffer adjusting spring 23. The sliding adjusting plate 22 slides inside the side end of the outer casing 2 to ensure that the side adjusting protective plate 20 remains horizontal and does not tilt. The scale line 16 on the detection column 18 can intuitively display the adjustment displacement, ensuring that the adjustment on both sides is symmetrical and consistent. Through the above adjustment, the outer casing 2 can adapt to embedding grooves of different sizes to achieve a stable and close pre-embedded installation.

[0039] The inner casing 3 is slidably engaged in the sliding groove 11 of the outer casing 2 via a sliding plate 26, and is further fixed by a limiting baffle 4. When maintenance of the internal electrical equipment and instruments is required, the operator can remove the side plate 10 by pulling the handle 8, and pull the inner casing 3 outward along the sliding groove 11, exposing the inner casing 25. After maintenance, the inner casing 3 is pushed back to its original position, and the side plate 10 is re-secured. This achieves a separable structure between the inner and outer casings, greatly facilitating subsequent maintenance operations. The inner casing 25 is equipped with a baffle adjustment section 3. 1. Used for installing various electrical equipment and instruments, the mounting frame 35 is slidably mounted on the track adjustment plate 32 via the second sliding adjustment plate 34. The operator can adjust the position of the second sliding adjustment plate 34 on the track adjustment plate 32 by turning the locking bolt 33, thereby changing the spacing of the mounting frame 35. Equipment of different sizes can be mounted on the mounting frame 35 through the second fixed mounting hole 37. The wires connected to the equipment are guided and blocked by the rotating partition shaft 40 and the first side partition plate 38 to achieve neat wiring buffering and direction change, and avoid messy tangling of the wires;

[0040] The bottom of the inner casing 25 is equipped with a wiring protection section 30. Before the cable is led out of the equipment, it is first wound around the take-up rod 42, with a certain length of redundant cable reserved. The take-up rod 42 rotates and engages with the middle of the sliding detection plate 45. The sliding detection plate 45 is supported on both sides by detection springs 44 within the limit columns 46. A pressure sensor 47 is provided at the bottom. During normal wiring or cable pulling, the take-up rod 42 first rotates to release the cable, releasing the redundant length, and will not exert direct tension on the equipment's wiring terminals. When the redundant cable is completely pulled out, continued pulling will cause the cable to exert downward pressure on the take-up rod 42, pushing the sliding detection plate 45 to compress the detection spring 44 and move downward instantly. The pressure sensor 47 detects a large jump in the pressure value and transmits the signal to the PLC controller, triggering the alarm of the corresponding number. The system prompts operators to stop dragging to prevent the cable from disconnecting or being damaged from the equipment. It achieves automatic tension buffering and overload alarm protection during the wiring process, effectively avoiding loose connections and wire breakage caused by construction dragging. The upper end of the outer box 2 is provided with a first cable tray 5, and the upper end of the inner box 25 is provided with a second cable tray 24. The two are aligned to facilitate the introduction of the incoming cable and to reserve redundant cable on the top of the box. The bottom of the outer box 2 is provided with a cable tray 13 and a first cable tray hole 12, and the bottom of the inner box 25 is provided with a second cable tray hole 29. The outgoing cable is led out to each user through these holes. The exhaust fans 6 are fixedly installed inside both sides of the outer box 2. The air inlet of the exhaust fan 6 is aligned with the heat dissipation hole 27 on the side wall of the inner box 25. The air outlet is connected to the exhaust pipe 7 to exhaust hot air outside the box, achieving forced convection heat dissipation and preventing high temperature inside the box from affecting the operation of the equipment.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre-embedded single-phase multi-position energy metering box, comprising a fixed protective cover (1), an outer casing (2), an inner casing body (3), and a limiting baffle (4), characterized in that: The inner box body (3) is located inside the outer box body (2). The fixed protective cover (1) is fixedly connected to the upper end of the outer box body (2) by bolts. The limiting baffle (4) is fixedly connected between the two ends of the outer box body (2) and the inner box body (3) by bolts. The upper middle part of the outer box body (2) is provided with a first cable tray (5). The two ends of the outer box body (2) are evenly provided with sliding slots (11). The middle part of the bottom end of the outer box body (2) is provided with a cable tray (13). The bottom of the outer box body (2) is evenly provided with a first cable tray hole (12). The first cable tray hole (12) is connected to the cable tray (13).

2. The pre-embedded single-phase multi-position energy metering box according to claim 1, characterized in that: The outer casing (2) has fixed mounting plates (9) installed on both sides of the interior. The fixed mounting plates (9) are uniformly fixed with exhaust fans (6). The outer end of the exhaust fan (6) is fixedly connected with a discharge pipe (7).

3. The embedded single-phase multi-position energy metering box according to claim 2, characterized in that: The outer casing (2) is symmetrically fixed with second limiting baffles (17) at both ends, and the second limiting baffles (17) are distributed on the outer sides of both ends of the outer casing (2). The outer casing (2) is symmetrically fixed with positioning detection rings (15) at both ends, and the positioning detection rings (15) are located on the inner side of the middle of the second limiting baffles (17). The outer casing (2) is provided with side adjustment protective plates (20) on both sides. The side adjustment protective plates (20) are fixedly connected with sliding adjustment plates (22) on both sides and the side closer to the outer casing (2), and the sliding adjustment plates (22) are slidably engaged with the inside of the side end of the outer casing (2). The buffer adjustment springs (23) are evenly fixed between the inner side of the side adjustment protective plates (20) and the outer side of the outer casing (2) by bolts and fixing plates. The side adjustment protective plates (20) are evenly provided with fixing holes (21) on both sides. The two ends of the side adjustment protective plates (20) are fixed with the fixed installation holes (21) on both sides. A threaded adjusting rod (19) is fixedly installed in the middle of one side near the outer casing (2). A detection column (18) is fixedly installed in the middle of the side end of the threaded adjusting rod (19) away from the side adjusting protective plate (20). Scale lines (16) are evenly arranged on the detection column (18). The detection column (18) and the threaded adjusting rod (19) pass through the middle of the second limiting baffle (17). The outer surfaces of the threaded adjusting rod (19) and the detection column (18) are adjacent to the second limiting baffle. There is a gap between the baffles (17), and scale lines (16) are evenly arranged on the detection column (18). The detection column (18) is inserted into the interior of the positioning detection ring (15). The adjusting nut (14) is threadedly rotated on the threaded adjusting rod (19), and the adjusting nut (14) is located on the side end of the second limiting baffle (17) away from the side adjusting protective plate (20). The adjusting nut (14) is pressed and fitted against the outer wall of the second limiting baffle (17).

4. The embedded single-phase multi-position energy metering box according to claim 3, characterized in that: The inner box body (3) includes a second cable tray (24), an inner box body (25), a sliding plate (26), a heat dissipation hole (27), a protective door (28), a second cable routing hole (29), a wiring protection part (30), and a partition adjustment part (31). The second cable tray (24) is opened through the middle of the upper end of the inner box body (25). The sliding plate (26) is evenly fixed at both ends of the inner box body (25). The heat dissipation hole (27) is evenly opened on both sides of the inner box body (25). The protective door (28) is rotatably installed on the outside of the inner box body (25). The partition adjustment part (31) is located inside the inner box body (25). The second cable routing hole (29) is evenly opened through the bottom end of the inner box body (25). The wiring protection part (30) is located inside the bottom end of the inner box body (25) and is located above the second cable routing hole (29).

5. The pre-embedded single-phase multi-position energy metering box according to claim 4, characterized in that: The partition adjustment part (31) includes a track adjustment plate (32), a locking bolt (33), a second sliding adjustment plate (34), a mounting frame (35), a fixed connecting plate (36), a second fixed mounting hole (37), a first side partition plate (38), a limiting support plate (39), and a rotating partition shaft (40). The track adjustment plates (32) are symmetrically distributed. The fixed connecting plate (36) is fixedly connected to both ends of the track adjustment plate (32) by bolts. The second sliding adjustment plate (34) is symmetrically slidable. The moving clip is connected to the track adjustment plate (32), the mounting frame (35) is fixedly connected to the outer end of the second sliding adjustment plate (34), the second fixed mounting hole (37) is evenly opened through the mounting frame (35), the limiting support plate (39) is symmetrically distributed on the outer side of the track adjustment plate (32), the rotating partition shaft (40) is symmetrically rotated and installed between the limiting support plates (39), and the first side partition plate (38) is symmetrically fixedly installed on the rotating partition shaft (40).

6. The pre-embedded single-phase multi-position energy metering box according to claim 5, characterized in that: The wiring protection unit (30) includes a second side baffle (41), a winding rod (42), a baffle limiting plate (43), a detection spring (44), a sliding detection plate (45), a limiting post (46), and a pressure sensor (47). The limiting posts (46) are arranged in a mirror-symmetrical manner. The baffle limiting plate (43) is fixedly installed at both ends of the limiting posts (46). The sliding detection plate (45) is slidably engaged in the limiting posts (46), and the sliding detection plate (47) is also engaged in the limiting posts (46). The detection plate (45) is located in the middle of the limiting column (46), the detection spring (44) is arranged between the two sides of the sliding detection plate (45) and the partition limiting plate (43), and the pressure sensor (47) is located between the partition limiting plate (43) and the detection spring (44). The winding rod (42) is rotatably engaged in the middle of the sliding detection plate (45), and the second side partition plate (41) is symmetrically fixedly installed on the winding rod (42).

7. A pre-embedded single-phase multi-position energy metering box according to claim 6, characterized in that: The bottom of the limiting column (46) is fixedly connected to the bottom of the inner box (25) and located outside the second wiring hole (29). The track adjustment plate (32) and the limiting support plate (39) are fixedly connected to the inside of the inner box (25).

8. A pre-embedded single-phase multi-position energy metering box according to claim 7, characterized in that: The sliding plate (26) is slidably engaged inside the sliding slot (11). A side plate (10) is fixedly provided between the inner box (25) and the side end of the outer box (2). A pull handle (8) is symmetrically fixedly installed on the outer side of the side plate (10), and the discharge pipe (7) is inserted through the side plate (10).

9. A pre-embedded single-phase multi-position energy metering box according to claim 8, characterized in that: The exhaust fan (6) is located on the side away from the discharge pipe (7) outside the heat dissipation hole (27). The limiting baffle (4) is positioned between the outer box (2) and the inner box (25). The first cable tray (5) is aligned with the second cable tray (24). The fixed protective cover (1) is fixedly installed on the second limiting baffle (17) by bolts.

10. A pre-embedded single-phase multi-position energy metering box according to claim 8, characterized in that: An alarm is provided on one side of the outer casing (2), and the number of alarms is the same as the number of wiring protection parts (30).

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