A smart meter box with power quality monitoring

Abstract

The application discloses a kind of intelligent electric meter box with power quality monitoring applied to electric meter box field, by setting loose monitoring compensation unit, when voltage appears exception, whether the physical root of voltage exception is that a large number of power connection column loosening leads to, simultaneously after judging that voltage exception is caused by power connection column loosening, power connection column can also be loosened compensation, and then after voltage exception, effectively reduce the operation of artificial to the scene one by one to check whether power connection column is abnormal, greatly reduce fault checking range, simultaneously after exception, it can be automatically compensated, temporarily restore normal power transmission, provide enough repair time for maintenance personnel;In addition, by the setting of cut-off assembly, when power connection column is loose and leads to abnormal heating, it can automatically switch the conduction area, suppress local continuous heating without affecting normal power supply, reduce safety hazards.

Description

Technical Field

[0001] This invention relates to the field of meter boxes, and in particular to a smart meter box with power quality monitoring. Background Technology

[0002] With the rapid development of smart grids and the demand for high-quality power supply, traditional electricity meter boxes are gradually evolving into intelligent terminals integrating metering, communication, and sensing. Among these, the integration of power quality monitoring functions has become a key technological direction. Modern smart meter boxes, through high-precision sampling circuits, can monitor and record steady-state parameters of voltage and current (such as deviation, harmonics, and unbalance) and transient events (such as voltage sags, swells, and interruptions) in real time. This data provides valuable information for assessing power supply reliability, analyzing load characteristics, and tracing the source of faults, marking the transformation of the meter box from a simple "metering tool" into a "sensing node" at the edge of the power grid.

[0003] However, current smart meter boxes with power quality monitoring functions are still primarily focused on "data acquisition and reporting." When power quality anomalies are detected (e.g., frequent voltage dips or harmonic distortion), the system typically only records events and issues threshold alarms, but cannot automatically determine the specific physical cause of the anomaly. Examples include a low-voltage distribution network integrated monitoring system disclosed in Chinese patent application CN111416435A and a multi-position meter box disclosed in Chinese patent CN205982383U.

[0004] In the existing technology, when the meter box alarms for "voltage dip", maintenance personnel still need to bring professional equipment to the site to check one by one. In particular, there are many electrical terminals in the meter box, so there are many possible physical fault points related to the electrical terminals. If the abnormal point does appear on the electrical terminal, the efficiency of each on-site inspection is too low, the workload is too large, and the stable power supply is affected. Summary of the Invention

[0005] The core of this invention lies in setting up a looseness monitoring and compensation unit. When an abnormal voltage occurs, it can determine whether the physical cause of the voltage abnormality is due to a large number of loose terminals. After determining that the voltage abnormality is indeed caused by loose terminals, it can also compensate for the looseness of the terminals. This effectively reduces the need for manual on-site inspection of each terminal after a voltage abnormality occurs, significantly reducing the scope of fault diagnosis. Furthermore, it can automatically compensate after an abnormality occurs, temporarily restoring normal power transmission and providing maintenance personnel with sufficient time for repairs.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A smart meter box with power quality monitoring includes a meter box body, multiple sub-meter boxes installed inside the meter box body, a door and a cover plate installed at the front end of the meter box body, the multiple sub-meter boxes being located inside the door, a switch installed inside the meter box body, the switch being located inside the cover plate, multiple terminals installed on the switch, the multiple sub-meter boxes being connected to the terminals via wires, a power analysis chip installed inside the meter box body, a looseness monitoring compensation unit and a patch temperature sensor installed on each terminal, the looseness monitoring compensation unit and the patch temperature sensor being connected to the power analysis chip for signal transmission; The electrical connection post includes a copper post, two nuts threaded onto the copper post, and a conductive plate sleeved on the outside of the copper post. The conductive plate is electrically connected to the corresponding wire. The looseness monitoring and compensation unit is located between the conductive plate and the middle end face of the copper post, and the looseness monitoring and compensation unit is in contact with both of them. The looseness monitoring and compensation unit includes an insulating open ring, a C-shaped electrical connection plate fixedly embedded in the insulating open ring, and a compensation probe rod connected between the upper and lower ends of the C-shaped electrical connection plate.

[0008] Furthermore, the compensation probe includes two support segments that are fixedly connected to the upper and lower ends of the C-shaped contact piece, a pre-bent support rod fixedly connected between the two support segments, and two rigid sleeves that are fixedly connected to one end of the two support segments close to each other. The two ends of the pre-bent support rod are respectively inserted into the two rigid sleeves.

[0009] Furthermore, the support segments are made of insulating material, the pre-bent support rods are made of elastic material, and a bottom electromagnetic core and a top magnetic core are fixedly embedded in the two support segments respectively, with the bottom electromagnetic core located below the top magnetic core. When energized, the bottom electromagnetic core generates a magnetic repulsion force on the top magnetic core.

[0010] Furthermore, when no external force is applied, the upper and lower ends of the C-shaped contact piece are tilted toward the side that is far apart from each other. An elastic transition layer is fixedly embedded at both bends of the C-shaped contact piece. A conductive layer is provided inside the elastic transition layer, and the conductive layer connects the two ends of the bend of the C-shaped contact piece.

[0011] Optionally, two C-shaped electrical contacts are provided, and each of the two C-shaped electrical contacts is provided with an electrical cutting component in the middle. The electrical cutting component includes an airbag segment fixedly connected to the middle of the C-shaped electrical contact, two metal constraint springs that are respectively tightly attached to the inner and outer surfaces of the airbag segment, and two conductive strips that are respectively fixed to one end of the two airbag segments away from each other. The two conductive strips are electrically connected to the upper half and the lower half of the C-shaped electrical contact, respectively. Two transfer air tubes are also fixedly connected between the two airbag segments, and the transfer air tubes connect the two airbag segments.

[0012] Furthermore, the airbag section is made of an elastically sealed insulating material, and the airbag section is saturated with insulating gas.

[0013] Furthermore, copper sheets are fixedly connected to the inner walls of the two metal constraint springs on one C-shaped contact piece, and the corresponding conductive strip ends are fixedly connected through the metal constraint springs and the airbag segment and connected to the copper sheets. Electromagnetic sheets are fixedly connected to the inner walls of the two metal constraint springs on the other C-shaped contact piece, and the corresponding conductive strip ends are fixedly connected through the metal constraint springs, the airbag segment and the electromagnetic sheet and extend to be attached to the surface of the electromagnetic sheet on the side facing the center of the airbag segment.

[0014] Furthermore, without the presence of additional external forces: The metal constraint spring corresponding to the two copper pieces has an arc-shaped structure, with the middle part of the arc arching towards the inside of the airbag section, and the two copper pieces abutting against each other. The two metal constraint springs corresponding to the two electromagnetic plates have a flat structure, and the two electromagnetic plates do not contact each other, but attract each other when energized.

[0015] Compared with the prior art, the advantages of this invention are: (1) By setting up a loose monitoring and compensation unit, when the voltage is abnormal, it can determine whether the physical cause of the voltage abnormality is the looseness of a large number of terminals. After determining that the voltage abnormality is indeed caused by the loose terminals, it can also compensate for the looseness of the terminals. Thus, after the voltage is abnormal, it can effectively reduce the manual operation of checking the terminals one by one on site, greatly reduce the scope of fault investigation, and automatically compensate after the abnormality, temporarily restore normal power transmission, and provide maintenance personnel with sufficient maintenance time.

[0016] (2) By setting the power-off component, when the power connection post is loose and causes abnormal heating, the conductive area can be automatically switched, suppressing local continuous heating and reducing safety hazards without affecting the normal power supply. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the principle of the present invention; Figure 2 This is a perspective view of the present invention; Figure 3 This is a perspective view of the present invention after the cover plate and the box door have been removed; Figure 4 This is a perspective view of the electrical contact post of the present invention; Figure 5 This is an exploded view of the terminal block portion of the present invention; Figure 6 This is a perspective view of the loosening monitoring and compensation unit of the present invention; Figure 7 This is an exploded view of the loosening monitoring and compensation unit portion of the present invention; Figure 8 This is a cross-sectional view of the compensation probe of the present invention; Figure 9 This is a comparison diagram showing the changes of the C-shaped contact piece of the present invention before and after it is installed on the contact post; Figure 10 A perspective view of the two portions of the C-shaped contact piece of the present invention; Figure 11 A partial top view of the middle part of the loosening monitoring and compensation unit when two C-shaped connectors are provided in this invention; Figure 12 This is a partial top view of the middle part of the loosening monitoring and compensation unit after switching two C-shaped electrical contacts according to the present invention.

[0018] Explanation of the labels in the diagram: 1. Meter box body, 11. Box door, 12. Sub-meter box, 13. Cover plate, 31. Copper column, 32. Nut, 33. Conductive sheet, 2. Switch, 3. Connecting column, 4. Loosening monitoring and compensation unit, 41. Insulating open ring, 42. C-shaped connecting sheet, 43. Compensation probe, 421. Elastic transition layer, 422. Conductive layer, 401. Bottom electromagnetic core, 402. Top magnetic core, 431. Support segment, 432. Hard sleeve, 433. Pre-bent support rod, 51. Airbag segment, 52. Metal constraint spring, 53. Conductive strip, 54. Transfer air pipe, 501. Electromagnetic sheet, 502. Copper sheet. Detailed Implementation

[0019] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0020] First implementation method: like Figures 1-3 A smart meter box with power quality monitoring includes a meter box body 1, multiple sub-meter boxes 12 installed inside the meter box body 1, a door 11 and a cover plate 13 installed at the front end of the meter box body 1, the multiple sub-meter boxes 12 are all located inside the door 11, a switch 2 is also installed inside the meter box body 1, the switch 2 is located inside the cover plate 13, multiple terminals 3 are provided on the switch 2, the multiple sub-meter boxes 12 are connected to the terminals 3 by wires, a power analysis chip is also installed inside the meter box body 1, a looseness monitoring compensation unit 4 and a patch temperature sensor are installed on each terminal 3, the looseness monitoring compensation unit 4 and the patch temperature sensor are both connected to the power analysis chip, the power analysis chip can monitor the voltage change in real time, the specific monitoring principle is existing technology, and will not be described in detail here; When the power analysis chip detects an abnormal voltage, it first determines whether it is caused by a loose connection post 3. During this process, the power analysis chip sequentially checks the data of multiple surface-mount temperature sensors. If some surface-mount temperature sensors are running at high temperatures, the abnormal connection post 3 is directly located, narrowing down the scope of the anomaly investigation. If the temperature data is normal, it can be preliminarily ruled out that the connection post 3 is obviously loose. Then, multiple looseness monitoring and compensation units 4 are controlled to perform looseness compensation operations on the connection post 3. If the power data does not change significantly, the problem of loose connection post 3 can be ruled out. If the power data shows a significant trend of correction and improvement, the looseness monitoring and compensation units 4 on multiple connection posts 3 are controlled individually to perform compensation operations to locate the connection post 3 that may be loose. This narrows down the scope of the investigation for subsequent maintenance operations, reduces the workload, and allows the power to be restored to stability more quickly and effectively.

[0021] like Figures 4-5 The electrical connection post 3 includes a copper post 31, two nuts 32 threaded onto the copper post 31, and a conductive sheet 33 sleeved on the outside of the copper post 31. The conductive sheet 33 is electrically connected to the corresponding wire. The looseness monitoring and compensation unit 4 is located between the conductive sheet 33 and the middle end face of the copper post 31, and the looseness monitoring and compensation unit 4 is in contact with both of them.

[0022] like Figures 6-7 The loosening monitoring and compensation unit 4 includes an insulating open ring 41, a C-shaped contact piece 42 fixedly embedded in the insulating open ring 41, and a compensation probe 43 connected between the upper and lower ends of the C-shaped contact piece 42. The C-shaped contact piece 42 is configured as a single unit. Figure 8 The compensation probe 43 includes two support segments 431 fixedly connected to the upper and lower ends of the C-shaped contact piece 42, a pre-bent support rod 433 fixedly connected between the two support segments 431, and two rigid sleeves 432 fixedly connected to one end of the two support segments 431. The two ends of the pre-bent support rod 433 are inserted into the two rigid sleeves 432. The support segments 431 are made of insulating material, and the pre-bent support rod 433 is made of elastic material. Figure 6 and Figure 9When no external force is applied, the upper and lower ends of the C-shaped contact piece 42 are tilted towards the opposite side, so that the loosening monitoring and compensation unit 4 is fitted over the copper pillar 31. When the nut 32 is tightened, the elastic transition layer 421 is naturally pressed horizontally due to compression, and the pre-bent support rod 433 is compressed and bent, so that the loosening monitoring and compensation unit 4 is in a compressed state, thus fully contacting the upper surface of the copper pillar 31 and the conductive piece 33. This effectively ensures the connection stability between the conductive piece 33 and the copper pillar 31, effectively avoiding unstable contact between the conductive piece 33 and the copper pillar 31 due to the loosening of the nut 32, reducing the occurrence of poor contact. Even if the nut 32 is slightly loose, the conductive piece 33 can still make stable contact with the copper pillar 31 through the loosening monitoring and compensation unit 4 due to the contact and the ability of the C-shaped contact piece 42 to recover its deformation. Compared with the prior art, this effectively reduces the impact of the loosening of the contact post 3 on power transmission in the early stage.

[0023] like Figure 8 The bottom electromagnetic core 401 and the top magnetic core 402 are fixedly embedded in the two support segments 431 respectively, with the bottom electromagnetic core 401 located below the top magnetic core 402. When the bottom electromagnetic core 401 is energized, it generates a magnetic repulsion force on the top magnetic core 402. When the power analysis chip detects that the voltage abnormality is caused by the loose connection post 3, or when the looseness monitoring and compensation unit 4 verifies whether the connection post 3 has been slightly loose, the bottom electromagnetic core 401 can be energized to generate a magnetic repulsion force on the top magnetic core 402. This allows the looseness monitoring and compensation unit 4 to have an expansion and extension trend at both ends, thereby improving the stability of the connection at the conductive sheet 33-looseness monitoring and compensation unit 4-copper post 31, achieving the effect of looseness compensation, and maintaining the stability of the power.

[0024] like Figure 9 An elastic transition layer 421 is fixedly embedded at both bends of the C-shaped contact piece 42. A conductive layer 422 is provided inside the elastic transition layer 421. The conductive layer 422 connects the two ends of the bend of the C-shaped contact piece 42. The setting of the elastic transition layer 421 effectively assists the deformation ability of the two ends of the C-shaped contact piece 42 when the nut 32 is tightened, and at the same time effectively ensures that the bend of the C-shaped contact piece 42 is not easily damaged by force.

[0025] This solution, by setting up a looseness monitoring and compensation unit 4, can determine whether the physical cause of the voltage abnormality is due to the looseness of a large number of connection posts 3 when an abnormality occurs. After determining that the voltage abnormality is indeed caused by the loose connection posts 3, it can also compensate for the looseness of the connection posts 3. This effectively reduces the need for manual on-site inspection of each connection post 3 after a voltage abnormality occurs, significantly reducing the scope of fault diagnosis. At the same time, it can automatically compensate after an abnormality occurs, temporarily restoring normal power transmission and providing maintenance personnel with sufficient maintenance time.

[0026] Second implementation method: This embodiment further improves the C-shaped contact piece 42 based on the first embodiment, while the rest remains the same as the first embodiment.

[0027] like Figures 10-11 Two C-shaped electrical contacts 42 are provided, and each of the two C-shaped electrical contacts 42 is provided with a cutting component in the middle. The cutting component includes an airbag section 51 fixedly connected to the middle of the C-shaped electrical contact 42, two metal constraint springs 52 respectively tightly attached to the inner and outer surfaces of the airbag section 51, and two conductive strips 53 respectively fixed to one end of the two airbag sections 51 away from each other. The two conductive strips 53 are electrically connected to the upper half and the lower half of the C-shaped electrical contact 42 respectively. Two transfer air tubes 54 are also fixedly connected between the two airbag sections 51, and the transfer air tubes 54 connect the two airbag sections 51.

[0028] The airbag section 51 is made of elastically sealed insulating material, which effectively ensures that the conductive path between the upper and lower parts of the C-shaped contact plate 42 is limited to the power-cutting component, making it difficult for the upper and lower parts to be accidentally energized under unexpected circumstances. The airbag section 51 is saturated with insulating gas, which effectively ensures that the electromagnetic plate 501 and copper plate 502 in the two airbag sections 51 are in a separated state, making it difficult for accidental connection to occur, thus improving the electrical stability when disconnected.

[0029] like Figure 11 Two metal constraint springs 52 on a C-shaped contact plate 42 are fixedly connected to copper sheets 502 on their inner walls. The ends of the corresponding conductive strips 53 are fixedly connected through the metal constraint springs 52 and the airbag section 51 and are connected to the copper sheets 502. Without additional external force, the metal constraint springs 52 corresponding to the two copper sheets 502 are arc-shaped, with the middle part of the arc arching towards the inside of the airbag section 51, and the two copper sheets 502 abut against each other. This ensures that the two copper sheets 502 in the C-shaped contact plate 42 are always in contact and conductive without external force. This allows the C-shaped contact plate 42 on this side to form a stable conductive path between the copper pillar 31 and the conductive sheet 33. In other words, the C-shaped contact plate 42 on this side can be used as a commonly used effective conductive area. On another C-shaped contact plate 42, two metal constraint springs 52 are fixedly connected to electromagnetic plates 501 on their inner walls. The ends of the corresponding conductive strips 53 are fixedly inserted through the metal constraint springs 52, the air bladder segment 51, and the electromagnetic plates 501, and extend to be attached to the surface of the electromagnetic plates 501 facing the center of the air bladder segment 51. Under no external force, the two metal constraint springs 52 corresponding to the two electromagnetic plates 501 are flat and do not contact each other. After being energized, the two electromagnetic plates 501 attract each other, that is, the corresponding C-shaped contact plate 42 is in an idle state. When the power analysis chip detects abnormal power data and the patch temperature sensor detects an abnormal increase in the temperature of the contact post 3, the power analysis chip can control the two C-shaped contact plates 42 in the loosening monitoring compensation unit 4 on the corresponding contact post 3 to switch, that is, switch the effective conductive area to the C-shaped contact plate 42 on this side. Specifically, as shown in the figure... Figure 12 The power analysis chip can control the electromagnetic plate 501 to be energized, thereby causing the two to attract each other. At this time, the middle of the airbag section 51 is close to each other and squeezed, so the ends of the two conductive strips 53 attached to the electromagnetic plate 501 come into contact and conduct. At the same time, due to the compression of the middle of the airbag section 51, some of the insulating gas in the airbag section 51 is quickly squeezed into the airbag section 51 of the original conductive area, thereby separating the two copper plates 502 from each other, thus completing the switching of the effective conductive area. After the original heated conductive area is de-energized, it does not need to bear the conductive function, which can accelerate the dissipation of heat.

[0030] In summary, by setting up the power-cutting component, when the three power terminals become loose and cause abnormal heating, the conductive area can be automatically switched. This suppresses localized continuous heating and reduces safety hazards without affecting normal power supply.

[0031] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A smart meter box with power quality monitoring, comprising a meter box body (1), wherein multiple sub-meter boxes (12) are installed inside the meter box body (1), a door (11) and a cover plate (13) are installed at the front end of the meter box body (1), the multiple sub-meter boxes (12) are all located inside the door (11), and a circuit breaker (2) is also installed inside the meter box body (1), the circuit breaker (2) being located inside the cover plate (13), characterized in that: The circuit breaker (2) is provided with multiple terminals (3), and the multiple sub-meter boxes (12) are connected to the terminals (3) by wires. The meter box body (1) is also equipped with an energy analysis chip. Each terminal (3) is equipped with a looseness monitoring compensation unit (4) and a patch temperature sensor. The looseness monitoring compensation unit (4) and the patch temperature sensor are both connected to the energy analysis chip. The power receiving post (3) includes a copper post (31), two nuts (32) threaded onto the copper post (31), and a conductive plate (33) sleeved on the outside of the copper post (31). The conductive plate (33) is electrically connected to the corresponding wire. The loosening monitoring and compensation unit (4) is located between the conductive plate (33) and the middle end face of the copper post (31), and the loosening monitoring and compensation unit (4) is in contact with both of them. The loosening monitoring and compensation unit (4) includes an insulating open ring (41), a C-shaped power receiving plate (42) fixedly embedded on the insulating open ring (41), and a compensation probe (43) connected between the upper and lower ends of the C-shaped power receiving plate (42).

2. The smart meter box with power quality monitoring according to claim 1, characterized in that: The compensation probe (43) includes two support segments (431) that are fixedly connected to the upper and lower ends of the C-shaped contact plate (42), a pre-bent support rod (433) fixedly connected between the two support segments (431), and two hard sleeves (432) that are fixedly connected to one end of the two support segments (431) respectively. The two ends of the pre-bent support rod (433) are respectively inserted into the two hard sleeves (432).

3. A smart meter box with power quality monitoring according to claim 2, characterized in that: The support segment (431) is made of insulating material, and the pre-bent support rod (433) is made of elastic material. A bottom electromagnetic core (401) and a top magnetic core (402) are fixedly embedded in the two support segments (431), and the bottom electromagnetic core (401) is located below the top magnetic core (402). When energized, the bottom electromagnetic core (401) generates a magnetic repulsion force on the top magnetic core (402).

4. A smart meter box with power quality monitoring according to claim 3, characterized in that: When there is no external force, the upper and lower ends of the C-shaped contact piece (42) are tilted toward the side that is far away from each other. An elastic transition layer (421) is fixedly embedded at both turns of the C-shaped contact piece (42). A conductive layer (422) is provided in the elastic transition layer (421). The conductive layer (422) connects the two ends of the turns of the C-shaped contact piece (42).

5. A smart meter box with power quality monitoring according to claim 4, characterized in that: Two C-shaped electrical contacts (42) are provided, and each of the two C-shaped electrical contacts (42) is provided with a cutting component in the middle. The cutting component includes an airbag segment (51) fixedly connected to the middle of the C-shaped electrical contact (42), two metal constraint springs (52) respectively tightly attached to the inner and outer surfaces of the airbag segment (51), and two conductive strips (53) respectively fixed to the two airbag segments (51) at opposite ends. The two conductive strips (53) are electrically connected to the upper half and lower half of the C-shaped electrical contact (42) respectively. Two transfer air tubes (54) are also fixedly connected between the two airbag segments (51), and the transfer air tubes (54) connect the two airbag segments (51).

6. A smart meter box with power quality monitoring according to claim 5, characterized in that: The airbag section (51) is made of an elastically sealed insulating material and is saturated with insulating gas.

7. A smart meter box with power quality monitoring according to claim 6, characterized in that: Two metal constraint springs (52) on one of the C-shaped electrical contacts (42) are fixedly connected to copper sheets (502) on their inner walls. The corresponding conductive strip (53) ends are fixedly connected through the metal constraint springs (52) and the airbag section (51) and connected to the copper sheets (502). On the other C-shaped contact plate (42), two metal constraint springs (52) are fixedly connected to an electromagnetic plate (501) on their inner walls. The corresponding conductive strip (53) is fixedly inserted through the metal constraint spring (52), the airbag segment (51) and the electromagnetic plate (501) and extends to be attached to the surface of the electromagnetic plate (501) facing the center of the airbag segment (51).

8. A smart meter box with power quality monitoring according to claim 7, characterized in that: Without additional external force: The metal constraint spring (52) corresponding to the two copper pieces (502) has an arc-shaped structure, with the middle part of the arc arching towards the inside of the airbag section (51), and the two copper pieces (502) abutting against each other; The two metal constraint springs (52) corresponding to the two electromagnetic plates (501) have a flat structure. The two electromagnetic plates (501) do not contact each other, and the two electromagnetic plates (501) attract each other after being energized.

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