Low-voltage transformer area line loss treatment terminal

Abstract

The application relates to the technical field of power distribution network operation and maintenance detection, and discloses a low-voltage transformer area line loss treatment terminal, which comprises a shell, a top cover is arranged on the shell, a heat dissipation hole is arranged in the side wall of the shell, a heat dissipation cylinder capable of covering the heat dissipation hole is rotationally arranged in the shell, the inside of the heat dissipation cylinder is a hollow structure, and heat dissipation mesh plates are arranged on the two symmetrical surfaces, the heat dissipation mesh plates form heat dissipation channels when corresponding to the heat dissipation holes, and the wall surface of the heat dissipation cylinder outside the heat dissipation mesh plates is sealingly arranged; during work, the heat dissipation cylinder is rotated, the positions of the heat dissipation mesh plates are replaced, and the opening and closing of the heat dissipation channels are realized; the application can effectively solve the problems that the sealing shell of the existing low-voltage transformer area line loss treatment terminal has poor heat dissipation effect, the passive heat dissipation mode of the external heat dissipation fins is difficult to match the heat dissipation demand of the high-power circuit board, and the efficient heat dissipation and dustproof performance cannot be simultaneously considered.

Description

Technical Field

[0001] This invention relates to the field of power distribution network operation and maintenance testing technology, and in particular to a low-voltage distribution area line loss management terminal. Background Technology

[0002] The low-voltage distribution area line loss management terminal is the core equipment for distribution network area loss monitoring, metering analysis and line loss management. It generally includes a housing, a built-in detection and control circuit board and a control panel embedded in the housing. The enclosed housing protects the internal electrical components to adapt to complex operating environments such as substations and outdoor distribution areas.

[0003] To ensure dust protection, existing low-voltage distribution area line loss management terminals generally adopt a sealed housing structure. Due to the high integration and power consumption of the internal detection and control circuit boards, these terminals generate significant heat during continuous operation. Currently, most of these devices rely on heat sinks on the outside of the housing for passive heat dissipation. Heat is conducted through the housing wall to the heat sinks and then dissipates naturally. This results in a long heat transfer path, low air convection efficiency, and poor overall heat dissipation, easily leading to heat accumulation inside the housing. This causes the circuit board components to operate at high temperatures for extended periods, affecting the accuracy of detection data, accelerating component aging, and reducing the terminal's operational reliability and lifespan. While directly creating ventilation holes on the side wall of the housing to enhance air convection can improve heat dissipation efficiency, when the terminal is not in operation, idle, or in a high-dust environment, external dust and moisture can easily enter the housing through these holes, adhering to the circuit board and component surfaces, causing faults such as poor line contact and decreased insulation performance. Therefore, it cannot simultaneously meet the requirements for efficient heat dissipation and dust protection. Summary of the Invention

[0004] The purpose of this invention is to provide a low-voltage distribution area line loss management terminal to solve the problems of poor heat dissipation effect of the sealed shell of the existing low-voltage distribution area line loss management terminal, the difficulty of matching the heat dissipation requirements of high-power circuit boards with the passive heat dissipation method of external heat sink, and the inability to simultaneously achieve efficient heat dissipation and dust protection performance.

[0005] The present invention adopts the following technical solution: A low-voltage distribution area line loss management terminal includes a housing, within which a detection and control circuit board is disposed. The detection and control circuit board is electrically connected to a control panel embedded within the housing. A top cover is disposed on the housing, and heat dissipation holes are formed on the side wall of the housing. A heat dissipation cylinder is rotatably disposed within the housing, capable of covering the heat dissipation holes. The heat dissipation cylinder has a hollow structure, and heat dissipation mesh plates are disposed on two symmetrical surfaces. When the heat dissipation mesh plates correspond to the heat dissipation holes, they form heat dissipation channels. The wall surface of the heat dissipation cylinder outside the heat dissipation mesh plates is sealed. During operation, the heat dissipation cylinder is rotated to change the position of the heat dissipation mesh plates, thereby opening and closing the heat dissipation channels.

[0006] Preferably, there are two heat dissipation holes, distributed on the symmetrical two side walls of the housing.

[0007] Preferably, the size of the heat sink is larger than the size of the heat dissipation hole.

[0008] Preferably, a drive gear is coaxially arranged on the heat sink, and a drive gear plate that meshes with the drive gear is elastically arranged inside the housing. A drive hole is opened on the housing above the drive gear plate. The top cover is fastened to the housing, and a drive rod is provided at the bottom of the top cover. The drive rod can move in and out of the drive hole.

[0009] Preferably, the drive rod is rotatably mounted on the top cover, and the top end of the drive rod extends movably through the top end of the top cover; a positioning block is provided on the drive rod near the inner top wall of the top cover, and a clearance groove is provided on one side of the drive hole, the clearance groove extending into the positioning groove opened on the inner wall of the drive hole; during operation, the drive rod is rotated so that the positioning block smoothly enters the positioning groove from the clearance groove to complete the positioning of the top cover.

[0010] Preferably, a guide ring is provided inside the housing, the drive tooth plate is movably disposed within the guide ring, and a buffer spring is provided between the drive tooth plate and the guide ring.

[0011] Preferably, the outer surface of the housing is provided with a receiving groove along its circumference.

[0012] Preferably, a limiting rod is provided on the top cover, and limiting holes are provided on the housing at both the upper and lower ends of the receiving groove.

[0013] Preferably, at least two limiting rods are provided.

[0014] Preferably, the portion of the drive rod located at the top of the top cover is provided with a positioning line.

[0015] Compared with existing technologies, the advantages of this invention are as follows: This invention utilizes the heat dissipation holes on the side wall of the housing in conjunction with a rotatable hollow heat dissipation cylinder. When the heat dissipation mesh plate of the heat dissipation cylinder aligns with the heat dissipation holes, a continuous convection heat dissipation channel is formed inside and outside the housing. This accelerates internal air circulation and quickly dissipates the heat generated by the detection and control circuit board from the housing. Compared to the passive conduction heat dissipation method of traditional external heat sinks, this effectively shortens the heat transfer path, significantly improves heat dissipation efficiency, avoids heat accumulation inside the housing, and keeps the detection and control circuit board within a suitable operating temperature range. This ensures the accuracy of line loss detection data, slows down component aging, and extends the overall service life of the terminal.

[0016] Furthermore, this invention allows for flexible switching of the heat dissipation channel's open and closed states by rotating the heat dissipation cylinder: when the terminal is running, the heat dissipation channel is opened to meet the heat dissipation requirements under high power consumption conditions; when the terminal is not in operation or in a dusty, humid environment, rotating the heat dissipation cylinder causes the cylinder wall sealing surface to misalign with the heat dissipation holes, closing the heat dissipation channel to form an effective barrier, significantly reducing the probability of external dust and moisture intruding into the housing, avoiding faults such as poor component contact and decreased insulation performance caused by dust accumulation and moisture erosion, improving heat dissipation capacity while retaining the protective performance of the sealed housing, and adapting to complex field conditions. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure after removing the top cover; Figure 3 for Figure 2 Enlarged view of A in the middle; Figure 4 This is a schematic diagram of the structure of the heat sink and the drive tooth plate of the present invention; Figure 5 This is a schematic diagram of the structure of the top cover of the present invention when it is inverted; Figure 6 for Figure 1 A magnified view of B in the middle. Detailed Implementation

[0018] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments: like Figures 1 to 6As shown, the low-voltage distribution area line loss management terminal of the present invention includes a housing 1. A detection and control circuit board is fixedly installed inside the housing 1. The detection and control circuit board is electrically connected to a control panel 2 embedded inside the housing 1. A top cover 3 that can be opened and closed is provided on the top of the housing 1 to protect the internal components. Heat dissipation holes 4 are provided on the side wall of the housing 1 to serve as channels for air circulation between the inside and outside of the housing 1. Correspondingly, a heat dissipation cylinder 5 that can completely cover the heat dissipation holes 4 is rotatably installed inside the housing 1. The opening and closing of the heat dissipation holes 4 can be controlled by rotating the heat dissipation cylinder 5. The heat sink 5 has a hollow structure, with heat dissipation mesh plates 6 fixedly installed on its two symmetrical cylindrical walls. The heat dissipation mesh plates 6 have air permeability and airflow capacity, while the rest of the cylindrical walls are sealed. When the heat sink 5 rotates to the position where the heat dissipation mesh plate 6 corresponds to the heat dissipation hole 4, the heat dissipation hole 4 connects to the internal cavity of the housing 1 through the hollow heat sink 5, forming a through heat dissipation channel. This can accelerate the air convection inside and outside the housing 1 and quickly remove the heat generated by the operation of the detection and control circuit board. When the heat sink 5 rotates to the position where the sealed wall corresponds to the heat dissipation hole 4, the heat dissipation hole 4 is completely blocked and sealed, blocking the airflow path inside and outside the housing 1. This can effectively prevent external dust and moisture from entering the interior of the housing 1, improving heat dissipation capacity while maintaining good dustproof protection performance.

[0019] Furthermore, two heat dissipation holes 4 are provided, respectively distributed on the symmetrical side walls of the housing 1. Together with the heat dissipation mesh plates 6 on both sides of the heat dissipation cylinder 5, they can form convection channels for air intake and exhaust on both sides of the housing 1, greatly improving air circulation efficiency and enhancing the overall heat dissipation effect. The overall size of the heat dissipation cylinder 5 is larger than the size of the heat dissipation holes 4, ensuring that the sealed wall surface of the heat dissipation cylinder 5 can completely cover and block the heat dissipation holes 4, avoiding gaps and dust leakage, and ensuring the reliability of the seal and dust prevention.

[0020] To enable the heat sink 5 to automatically switch working states as the top cover 3 opens and closes, a drive gear 7 is coaxially fixedly installed at one end of the heat sink 5. A drive gear plate 8 that meshes with the drive gear 7 is elastically arranged inside the housing 1. The drive gear plate 8 is arranged in the vertical direction, and its up and down movement can drive the drive gear 7 to rotate, thereby driving the heat sink 5 to rotate synchronously. A drive hole 9 is provided on the top wall of the housing 1 above the drive tooth plate 8. When the top cover 3 is fastened to the housing 1, the drive rod 12 provided at the bottom of the top cover 3 can move through the drive hole 9 into the housing 1 and abut against the top of the drive tooth plate 8. When the top cover 3 is fastened downward, the drive rod 12 moves downward synchronously with the top cover 3, pushing the drive tooth plate 8 to move downward. Through tooth meshing, it drives the drive gear 7 to rotate, causing the heat sink 5 to rotate synchronously, completing the misalignment of the heat sink mesh 6 and the heat sink hole 4, and closing the heat dissipation channel. When the top cover 3 is opened upward, the drive rod 12 moves upward synchronously with the top cover 3 and disengages from the drive hole 9. The drive tooth plate 8 resets upward under the elastic force, driving the drive gear 7 to rotate in the opposite direction, so that the heat sink mesh 6 of the heat sink 5 re-aligns with the heat sink hole 4, automatically opening the heat dissipation channel. No manual operation of the heat sink 5 is required, making it convenient to use.

[0021] Furthermore, a guide ring 10 is fixedly installed inside the housing 1, and the drive gear plate 8 is movably inserted through the guide ring 10. The guide ring 10 can limit and guide the movement path of the drive gear plate 8, ensuring that the drive gear plate 8 always moves smoothly in the vertical direction, avoiding deviation and jamming, and ensuring stable and reliable meshing transmission with the drive gear 7. A buffer spring 11 is provided between the drive gear plate 8 and the guide ring 10. The buffer spring 11 can provide an upward reset force for the drive gear plate 8, realizing the automatic closure of the heat dissipation channel after the top cover 3 is opened; on the other hand, it can buffer the downward pressure of the drive rod 12 when the top cover 3 is closed, avoiding hard impact that could damage the components, and improving the smoothness of the structure's operation and service life.

[0022] Furthermore, the drive rod 12 is rotatably mounted on the top cover 3, and the top end of the drive rod 12 extends movably from the top end of the top cover 3, facilitating the operator to rotate the drive rod 12 from outside the top cover 3. A positioning block 13 is fixedly installed on the drive rod 12 near the inner top wall of the top cover 3. A clearance groove 14 is provided on one side of the drive hole 9, through which the positioning block 13 can pass. The clearance groove 14 extends downward into the positioning groove 15 opened on the inner wall of the drive hole 9, and the positioning groove 15 is arranged circumferentially along the drive hole 9. When the top cover 3 is fastened in place, rotating the top end of the drive rod 12 can drive the positioning block 13 from the clearance groove 14 into the positioning groove 15. Through the engagement of the positioning block 13 and the positioning groove 15, the top cover 3 and the housing 1 are axially positioned, preventing the top cover 3 from accidentally popping open and improving the stability of the terminal closed state. When it is necessary to open the top cover 3, the drive rod 12 is rotated in the opposite direction to return the positioning block 13 to the clearance groove 14 position, and the top cover 3 can be lifted upward. The operation is simple and the locking is reliable. The part of the drive rod 12 located at the top of the top cover 3 is provided with a positioning line 16, which can intuitively indicate the rotation angle and alignment status of the drive rod 12, making it easy for operators to quickly determine the corresponding positions of the positioning block 13, the clearance groove 14, and the positioning groove 15, thereby improving operating efficiency and accuracy.

[0023] Furthermore, in this invention, a receiving groove 17 is provided on the outer side of the housing 1 along its circumference. The receiving groove 17 can be used to store the wires connecting the terminal to the power grid equipment. Excess wire length is wound and stored in the receiving groove 17, avoiding tangling, knotting, damage, or loss due to scattered placement of wires, thus improving the portability of the equipment. Correspondingly, a limiting rod 19 is fixedly provided on the top cover 3, and limiting holes 18 are provided on the housing 1 at both ends of the receiving groove 17. When the top cover 3 is fastened to the housing 1, the limiting rod 19 moves down synchronously with the top cover 3 and inserts into the limiting hole 18. The rod body of the limiting rod 19 spans across the outside of the receiving groove 17, which can block and limit the wires wound and stored in the receiving groove 17, effectively preventing the wires from coming out of the receiving groove 17 and ensuring the stability of the stored state. At least two limiting rods 19 are provided, which can form multiple limiting blocks in the circumferential direction, further improving the reliability of wire storage and preventing wires from loosening and scattering during transportation or movement.

[0024] The working process of this terminal is as follows: When in use, remove the top cover 3 and take out the connecting wire from the receiving groove 17. The drive tooth plate 8 is reset under the elastic restoring force of the buffer spring 11. The drive tooth plate 8 will drive the drive gear 7 to rotate, which in turn drives the heat sink 5 to rotate, so that the heat sink mesh plates 6 on both sides of the heat sink 5 are aligned with the heat sink holes 4 on both sides of the housing 1, forming a through convection heat dissipation channel. The heat generated by the detection control circuit board can be quickly dissipated through the heat dissipation channel. After use, the top cover 3 is fastened to the housing 1. The drive rod 12 will enter the drive hole 9 and push the drive tooth plate 8 down, driving the drive gear 7 to rotate in the opposite direction to the heat sink 5, so that the sealing wall of the heat sink 5 blocks the heat sink holes 4, automatically closing the heat dissipation channel and preventing the intrusion of external dust and moisture. After the top cover 3 is fastened in place, rotate the top of the drive rod 12 so that the positioning block 13 is rotated into the positioning groove 15 to complete the locking of the top cover 3. At this time, the limit rod 19 is simultaneously inserted into the limit hole 18 to form a limit protection for the wire wrapped in the receiving groove 17.

Claims

1. A low-voltage distribution area line loss management terminal, comprising a housing, wherein a detection and control circuit board is disposed within the housing, the detection and control circuit board being electrically connected to a control panel embedded within the housing, and a top cover being disposed on the housing, characterized in that: The shell has heat dissipation holes on its side wall, and a heat dissipation cylinder that can cover the heat dissipation holes is rotatably disposed inside the shell. The heat dissipation cylinder has a hollow structure inside, and heat dissipation mesh plates are provided on two symmetrical surfaces. When the heat dissipation mesh plates correspond to the heat dissipation holes, they form heat dissipation channels. The wall surface of the heat dissipation cylinder outside the heat dissipation mesh plates is sealed. During operation, the heat dissipation cylinder is rotated to change the position of the heat dissipation mesh plates, thereby opening and closing the heat dissipation channels.

2. The low-voltage distribution area line loss management terminal according to claim 1, characterized in that: The heat dissipation holes are provided in two places, distributed on the two symmetrical side walls of the housing.

3. The low-voltage distribution area line loss management terminal according to claim 2, characterized in that: The size of the heat sink is larger than the size of the heat dissipation hole.

4. The low-voltage distribution area line loss management terminal according to any one of claims 1-3, characterized in that: A drive gear is coaxially mounted on the heat sink, and a drive gear plate that meshes with the drive gear is elastically mounted inside the housing. A drive hole is opened on the housing above the drive gear plate. The top cover is fastened to the housing, and a drive rod is provided at the bottom of the top cover. The drive rod can move in and out of the drive hole.

5. The low-voltage distribution area line loss management terminal according to claim 4, characterized in that: The drive rod is rotatably mounted on the top cover, and the top end of the drive rod extends movably through the top end of the top cover. A positioning block is provided on the drive rod near the inner top wall of the top cover, and a clearance groove is provided on one side of the drive hole, extending into the positioning groove opened on the inner wall of the drive hole. During operation, the drive rod is rotated so that the positioning block smoothly enters the positioning groove from the clearance groove to complete the positioning of the top cover.

6. The low-voltage distribution area line loss management terminal according to claim 4, characterized in that: A guide ring is provided inside the housing, the drive tooth plate is movably disposed within the guide ring, and a buffer spring is provided between the drive tooth plate and the guide ring.

7. The low-voltage distribution area line loss management terminal according to claim 1, characterized in that: The outer surface of the shell is provided with a receiving groove along its circumference.

8. The low-voltage distribution area line loss management terminal according to claim 7, characterized in that: The top cover is provided with a limiting rod, and the housing at both ends of the receiving groove is provided with limiting holes.

9. The low-voltage distribution area line loss management terminal according to claim 1, characterized in that: At least two limit rods are provided.

10. The low-voltage distribution area line loss management terminal according to claim 5, characterized in that: The portion of the drive rod located at the top of the top cover is provided with a positioning line.

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