Electric meter box with wire anti-pulling structure
By introducing a winding wheel, toothed gear, elastic element, and air duct structure into the meter box, the problem of unstable connection caused by wire pulling is solved, realizing anti-pull protection and self-cleaning function of the wire, and improving the durability and safety of the meter box.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ANHUI ANNET ELECTRIC CO LTD
- Filing Date
- 2026-01-28
- Publication Date
- 2026-06-02
AI Technical Summary
The existing meter boxes lack effective wire pull protection structures, resulting in loose wire connections and poor contact, posing safety hazards and making it difficult to guarantee long-term stability.
It adopts a locking structure of winding wheel, toothed wheel, toothed block and elastic element, combined with the wire layout of alternating elastic telescopic rod and fixed rod, and the wire winding and buffer design to prevent the tension from being transmitted to the meter connection. At the same time, the air passage structure of the elastic telescopic rod realizes self-cleaning.
It effectively prevents wire connections from loosening, buffers large tensile forces, reduces frictional losses, ensures long-term stable operation of the meter, and reduces maintenance frequency and costs through its self-cleaning function.
Smart Images
Figure CN122136711A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of power metering equipment technology, specifically to a meter box with a conductor anti-pull structure. Background Technology
[0002] As the core installation carrier of electricity metering equipment, the meter box is widely used in various scenarios such as residential communities, industrial plants, and commercial buildings. The stability of the internal wire connections directly determines the metering accuracy and the security of the power supply. Existing meter boxes usually only have simple cable management clips or cable trays to organize the wire arrangement, lacking a targeted wire pull protection structure.
[0003] During actual installation and use, the external wires of the meter box are often subjected to varying degrees of tension due to factors such as construction dragging, external impact, and environmental disturbance. Since one end of the wire is fixedly connected to the meter terminal block and the other end extends outside the box to connect with the power supply line, when external tension is applied to the wire, the tension is directly transmitted to the connection point between the wire and the meter. Long-term or instantaneous large tension can easily cause the terminal block to loosen, the wire joint to fall off, or even cause the internal core of the wire to break.
[0004] This problem not only causes metering errors and power outages, but also poses a safety hazard due to potential electrical sparks caused by poor contact. While some meter boxes attempt to mitigate the effects of tension by increasing the length of the pre-existing wires, these wires are prone to tangling and getting tangled, leading to poor heat dissipation, short circuit risks, and failing to fundamentally block the transmission of tension, thus making it difficult to guarantee the long-term stability of the wire connections. Therefore, solving the connection failure problem caused by wire tension has become a critical technical challenge that urgently needs to be addressed in the existing meter box structural design. Summary of the Invention
[0005] To address the shortcomings of existing technologies, this invention provides an electric meter box with a wire-stretching protection structure.
[0006] To achieve the above objectives, the present invention provides the following technical solution: an electric meter box with a wire anti-pull structure, comprising a box body and a partition plate fixedly installed inside the box body. Multiple wire management units are installed at the bottom inner side of the box body. Each wire management unit includes multiple winding wheels. A shaft is fixedly installed on the inner side of each winding wheel. Multiple support plates are fixedly installed inside the box body, and the shaft is rotatably supported on the support plates. A first guide ring is fixedly installed on the inner side of each winding wheel. The end of the wire passes through the inner side of the first guide ring along the axial direction of the winding wheel, and passes through the winding wheel radially and is wound around the winding wheel. A toothed gear is fixedly installed on one end of the shaft. An elastic element is fixedly installed on the support plate. A toothed block is fixedly installed on one end of the elastic element, and the teeth on the toothed block can mesh with the teeth on the toothed gear.
[0007] Preferably, the interior of the housing is further fixedly equipped with a plurality of second elastic telescopic rods and fixed rods, which are distributed alternately in sequence. A pair of second guide wheels are rotatably mounted on the top of each of the second elastic telescopic rods and fixed rods. The wire passes between the two second guide wheels and crosses the alternately distributed second elastic telescopic rods and fixed rods.
[0008] Preferably, the housing is equipped with a filter window, and the filter window is provided with filter cotton inside; An air inlet head is fixedly installed on the bottom end of the second elastic telescopic rod, and a first one-way valve is fixedly installed on the air inlet head; A connecting pipe is provided at the bottom end of the second elastic telescopic rod, which is connected to the bottom of the inner part of multiple second elastic telescopic rods. A main pipe is fixedly installed inside the box, and an air jet frame is fixedly installed on the main pipe through multiple branch pipes. The air jet frame is located near the filter window and has multiple exhaust holes facing the filter cotton. The connecting pipe is fixedly connected to the main pipe through a connecting pipe, and a second one-way valve is fixedly installed on the connecting pipe.
[0009] Preferably, a second guide ring is fixedly installed on the housing, and the wire passes through the inside of the second guide ring.
[0010] Preferably, the elastic element is a first elastic telescopic rod, the fixed end of which is fixedly connected to the support plate, and the movable end of which is fixedly connected to the toothed block.
[0011] Preferably, a pressure rod is fixedly installed on the movable end of the first elastic telescopic rod.
[0012] Compared with the prior art, the present invention provides an electric meter box with a wire-stretching protection structure, which has the following advantages: 1. The fixed connection between the winding wheel and the conductor, along with the interlocking locking structure of the toothed wheel, toothed block, and first elastic telescopic rod, effectively restricts the rotation of the winding wheel, preventing external tension from being transmitted to the connection between the conductor and the meter, thus avoiding problems such as loose connection and poor contact. At the same time, the push-to-unlock design facilitates conductor length adjustment, balancing reliability and ease of operation, and meeting the long-term stable operation requirements of the meter.
[0013] 2. The alternating distribution of the second elastic telescopic rods and the fixed rods, combined with the double guide wheel structure, causes the conductors to be arranged in an "S" shape. When the conductors are subjected to large tensile forces, the elastic telescopic rods can retract to release the conductor length, buffering the impact of the tensile force and preventing the conductors from being damaged due to excessive force. In addition, the guiding protection of the second guide ring reduces friction loss between the conductors and the edge of the box, further improving the durability of the conductors.
[0014] 3. The extension and retraction of the second elastic telescopic rod compresses air, which is then delivered to the jet frame through the air duct. This achieves directional jet cleaning of the filter cotton in the filter window, removing dust and ensuring ventilation efficiency without the need for an additional power source. The one-way valve structure ensures unidirectional airflow circulation, preventing dust backflow, reducing the frequency of manual cleaning, lowering the maintenance cost of the meter box, and making it suitable for dusty outdoor environments.
[0015] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description
[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the internal structure of the box in this invention; Figure 2 This is a schematic diagram of the structure of multiple thread-arranging units in this invention; Figure 3 This is a schematic diagram of one side of the thread-organizing unit in this invention; Figure 4 In this invention Figure 3 Enlarged view of part A in the image; Figure 5 This is a schematic diagram of the structure on the other side of the thread-organizing unit in this invention; Figure 6 This is a schematic diagram of the main pipe, jet frame, and branch pipe in this invention; Figure 7 This is a schematic diagram of the structure of the housing and filter window in this invention.
[0017] In the diagram: 1. Housing; 2. Divider plate; 3. Rewinding reel; 4. Wire guide; 5. Shaft; 6. Gear; 7. First elastic telescopic rod; 8. Gear block; 9. Pressure rod; 10. First guide ring; 11. First guide wheel; 12. Second elastic telescopic rod; 13. Fixing rod; 14. Second guide wheel; 15. Connecting pipe; 16. Connecting pipe; 17. Main pipe; 18. Jet frame; 19. Branch pipe; 20. Air inlet head; 21. First one-way valve; 22. Second guide ring; 23. Filter window; 24. Support plate; 25. Second one-way valve. Detailed Implementation
[0018] The following is in conjunction with the appendix Figure 1-7The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.
[0019] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.
[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0021] The enclosure 1 is an integral installation carrier, and a partition plate 2 is fixedly installed inside it. The partition plate 2 divides the interior of the enclosure 1 into two independent cavities, the upper part of which is the meter mounting cavity, used to fix and install the main body of the meter, and the lower part of which is the cable management cavity, specifically used for arranging the wires 4.
[0022] The cable management cavity contains multiple cable management units, each including multiple take-up wheels 3. The take-up wheels 3 are used to wind and store the wires 4, and a shaft 5 is fixedly installed on its inner side, serving as a rotational support component for the take-up wheels 3. Multiple support plates 24 are fixedly installed inside the housing 1 at positions corresponding to the shaft 5. The shaft 5 is rotatably supported on the support plates 24, allowing the take-up wheels 3 to rotate flexibly around the axis of the shaft 5, facilitating the winding and length adjustment of the wires 4.
[0023] To ensure that the wire 4 is accurately guided to the winding wheel 3, a first guide wheel 11 is rotatably installed inside the housing 1. After the wire 4 is led out from the meter, it is guided by the first guide wheel 11 to change its direction and is smoothly transported to the position of the winding wheel 3. A first guide ring 10 is fixedly installed on the inner side of each winding wheel 3. The end of the wire 4 passes through the inner side of the first guide ring 10 along the axial direction of the winding wheel 3, and then passes through the body of the winding wheel 3 along the radial direction. The radial passage position of the wire 4 is fixedly connected to the winding wheel 3, and finally it is wound on the outer circumference of the winding wheel 3. The first guide ring 10 can prevent the wire 4 from shifting axially during the winding process and ensure the winding regularity.
[0024] To achieve the locking function of the winding reel 3, a toothed gear 6 is fixedly installed at one end of the shaft 5. An elastic element is fixedly installed on the support plate 24 at the position corresponding to the toothed gear 6. A toothed block 8 is fixedly installed at one end of the elastic element, and the teeth on the toothed block 8 can mesh with the teeth on the toothed gear 6. In its natural state, the elastic element provides an elastic force, pushing the toothed block 8 to mesh tightly with the toothed gear 6, thereby preventing the shaft 5 from rotating and thus limiting the rotation of the winding reel 3. At this time, the wire 4 is wound on the winding reel 3. When the wire 4 is subjected to external tension, because the winding reel 3 cannot rotate, the tension cannot be transmitted to the connection between the wire 4 and the meter, effectively protecting the connection stability and preventing loosening or poor contact.
[0025] In this embodiment, the elastic element is preferably a first elastic telescopic rod 7. The fixed end of the first elastic telescopic rod 7 is fixedly connected to the support plate 24, and its movable end is fixedly connected to the toothed block 8. The telescopic characteristics of the first elastic telescopic rod 7 provide a continuous elastic thrust to ensure reliable engagement between the toothed block 8 and the toothed gear 6. To facilitate adjustment of the rotation state of the take-up wheel 3, a pressure rod 9 is also fixedly installed on the movable end of the first elastic telescopic rod 7. When it is necessary to rotate the take-up wheel 3 to adjust the length of the wire 4, the pressure rod 9 is pressed down. The pressure rod 9 causes the movable end of the first elastic telescopic rod 7 to retract, thereby causing the toothed block 8 to disengage from the toothed gear 6, releasing the engagement relationship between the two. At this time, the take-up wheel 3 can rotate freely. After the length adjustment of the wire 4 is completed, the pressure rod 9 is released, the first elastic telescopic rod 7 is reset, and the toothed block 8 engages and locks with the toothed gear 6 again.
[0026] To prevent the conductor 4 from being damaged due to insufficient length release when subjected to excessive tension, multiple second elastic telescopic rods 12 and fixed rods 13 are fixedly installed inside the housing 1, arranged alternately. A pair of second guide wheels 14 are rotatably mounted on the top of each of the second elastic telescopic rods 12 and fixed rods 13. The conductor 4 passes between the two second guide wheels 14, and passes over the alternating second elastic telescopic rods 12 and fixed rods 13 in an "S" shape. When the conductor 4 is subjected to significant external tension, since the winding wheel 3 is locked and cannot rotate, the tension on the conductor 4 acts on the second guide wheel 14 at the top of the second elastic telescopic rod 12, creating pressure on the movable end of the second elastic telescopic rod 12. This causes the movable end of the second elastic telescopic rod 12 to contract, thereby releasing a certain length of the conductor 4, buffering the impact of the tension on the conductor 4, and preventing the conductor 4 from breaking due to excessive force.
[0027] To ensure ventilation and heat dissipation inside the enclosure 1 while preventing dust from entering, a filter window 23 is installed on the enclosure 1. The filter window 23 is equipped with filter cotton, which filters the air entering the enclosure 1 and blocks dust and impurities. An air inlet head 20 is fixedly installed at the bottom end of the second elastic telescopic rod 12. A first one-way valve 21 is fixedly installed on the air inlet head 20. The first one-way valve 21 only allows air to enter the second elastic telescopic rod 12 from inside the enclosure 1 through the air inlet head 20.
[0028] A connecting pipe 15 is provided at the bottom end of the second elastic telescopic rod 12. The connecting pipe 15 is connected to the inner bottom of multiple second elastic telescopic rods 12, realizing the convergence of air inside the multiple second elastic telescopic rods 12. A main pipe 17 is fixedly installed inside the housing 1. The main pipe 17 is fixedly installed with multiple branch pipes 19. The air jet frame 18 is arranged near the filter window 23. Multiple exhaust holes are opened on the air jet frame 18, and all exhaust holes are facing the filter cotton. The connecting pipe 15 is fixedly connected to the main pipe 17 through a connecting pipe 16. A second one-way valve 25 is fixedly installed on the connecting pipe 16. The second one-way valve 25 only allows air to be delivered from the connecting pipe 15 to the main pipe 17 through the connecting pipe 16, preventing air backflow.
[0029] When the movable end of the second elastic telescopic rod 12 contracts under force, its internal space decreases, and the air is compressed. The compressed air is collected through the connecting pipe 15, and then enters the main pipe 17 through the connecting pipe 16 and the second one-way valve 25. Subsequently, it is distributed to the jet frame 18 through the branch pipe 19, and finally ejected at high speed from multiple exhaust holes on the jet frame 18, spraying onto the filter cotton and blowing off the dust attached to the surface of the filter cotton, realizing the self-cleaning of the filter cotton and ensuring the ventilation efficiency of the filter window 23. When the tension on the wire 4 disappears, the second elastic telescopic rod 12 returns to its original position under its own elasticity, and the movable end extends, forming a negative pressure inside. The air in the box 1 enters the interior of the second elastic telescopic rod 12 through the air inlet 20 and the first one-way valve 21, preparing for the next compression and exhaust.
[0030] To further optimize the guiding effect of the wire 4 and avoid wear when the wire 4 enters and exits the housing 1, a second guide ring 22 is fixedly installed on the housing 1. The wire 4 passes through the inside of the second guide ring 22. The second guide ring 22 limits and guides the wire 4 to ensure smooth movement when the wire 4 enters and exits the housing 1 and reduces frictional wear with the edge of the housing 1.
[0031] The meter box in this embodiment uses a combination of multiple structures to achieve both anti-pull protection for the wires, preventing the connection between the wires and the meter from being affected, and buffering the damage to the wires caused by large pulling forces. At the same time, it also enables the self-cleaning of the filter cotton without the need for an additional power source. The ingenious structural design is highly practical and can be widely used in various meter installation scenarios.
[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.
Claims
1. A meter box with a wire-pulling protection structure, comprising a box body (1) and a partition plate (2) fixedly installed inside the box body (1), characterized in that, Multiple cable management units are installed at the bottom of the box (1). Each cable management unit includes multiple take-up wheels (3). A shaft (5) is fixedly installed on the inner side of each take-up wheel (3). Multiple support plates (24) are fixedly installed inside the box (1). The shaft (5) is rotatably supported on the support plate (24). A first guide ring (10) is fixedly installed on the inner side of each take-up wheel (3). The end of the wire (4) passes through the inner side of the first guide ring (10) along the axial direction of the take-up wheel (3) and passes through the take-up wheel (3) along the radial direction of the take-up wheel (3) and is wound on the take-up wheel (3). A toothed gear (6) is fixedly installed on one end of the shaft (5). An elastic element is fixedly installed on the support plate (24). A toothed block (8) is fixedly installed on one end of the elastic element. The teeth on the toothed block (8) can mesh with the teeth on the toothed gear (6).
2. The meter box with a conductor anti-pull structure according to claim 1, characterized in that: The box (1) is also fixedly installed with a number of second elastic telescopic rods (12) and fixed rods (13). The number of second elastic telescopic rods (12) and fixed rods (13) are alternately distributed in sequence. A pair of second guide wheels (14) are rotatably installed on the top of the second elastic telescopic rods (12) and fixed rods (13). The wire (4) passes between the two second guide wheels (14) and crosses the alternately distributed second elastic telescopic rods (12) and fixed rods (13).
3. A meter box with a conductor anti-pull structure according to claim 2, characterized in that: The housing (1) is equipped with a filter window (23), and the filter window (23) is provided with filter cotton inside; An air inlet (20) is fixedly installed on the bottom end of the second elastic telescopic rod (12), and a first one-way valve (21) is fixedly installed on the air inlet (20). A connecting pipe (15) is provided at the bottom of the second elastic telescopic rod (12). The connecting pipe (15) is connected to the bottom of the inner part of multiple second elastic telescopic rods (12). A main pipe (17) is fixedly installed inside the box (1). An air jet frame (18) is fixedly installed on the main pipe (17) through multiple branch pipes (19). The air jet frame (18) is located near the filter window (23). Multiple exhaust holes are opened on the air jet frame (18), and the multiple exhaust holes face the filter cotton. The connecting pipe (15) is fixedly connected to the main pipe (17) through a connecting pipe (16). A second one-way valve (25) is fixedly installed on the connecting pipe (16).
4. A meter box with a conductor anti-pull structure according to claim 1, characterized in that: A second guide ring (22) is fixedly installed on the housing (1), and the wire (4) passes through the inside of the second guide ring (22).
5. A meter box with a conductor anti-pull structure according to claim 1, characterized in that: The elastic element is a first elastic telescopic rod (7), the fixed end of the first elastic telescopic rod (7) is fixedly connected to the support plate (24), and its movable end is fixedly connected to the toothed block (8).
6. A meter box with a conductor anti-pull structure according to claim 5, characterized in that: A pressure rod (9) is fixedly installed on the movable end of the first elastic telescopic rod (7).