CN111900636A - Intelligent power box and monitoring system thereof - Google Patents

Intelligent power box and monitoring system thereof Download PDF

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Publication number
CN111900636A
CN111900636A CN202010606315.6A CN202010606315A CN111900636A CN 111900636 A CN111900636 A CN 111900636A CN 202010606315 A CN202010606315 A CN 202010606315A CN 111900636 A CN111900636 A CN 111900636A
Authority
CN
China
Prior art keywords
module
box body
power box
box
equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010606315.6A
Other languages
Chinese (zh)
Inventor
高勇
张景辉
王怀民
孙涛
霍春旻
田生财
范龙
武曹军
陈光雨
王海风
刘云飞
柳鹏
曹承彬
刘玉林
高晓伟
刘波
白戌杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Hebei Power Transmission and Transformation Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Hebei Power Transmission and Transformation Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Hebei Electric Power Co Ltd, Hebei Power Transmission and Transformation Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN202010606315.6A priority Critical patent/CN111900636A/en
Publication of CN111900636A publication Critical patent/CN111900636A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/46Boxes; Parts thereof or accessories therefor
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/24Circuit arrangements for boards or switchyards
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

The invention relates to the technical field of power boxes, in particular to an intelligent power box, which comprises a box body; the box door is mounted on the front side and the rear side of the box body, the shielding plate and the mounting plate are mounted in the box body, one side, close to the mounting plate, of the shielding plate is used for mounting equipment, and the other side of the shielding plate is used for arranging conducting circuits; a plurality of mounting holes are uniformly formed in the shielding plate, and the shielding plate is used for shielding the connection between the wires inside the box body and the equipment. According to the invention, various parameters of equipment in the box body are monitored through the power box monitoring module, monitoring data are sent to the background monitoring end and the mobile end in real time, the equipment parameters are subjected to statistical analysis, and potential safety hazard accidents are pushed to related management personnel according to the analysis result, so that the purpose of finding potential safety hazards in advance and processing the potential safety hazards in time is achieved, and the convenience and the safety reliability of the use of electric equipment are improved.

Description

Intelligent power box and monitoring system thereof
Technical Field
The invention relates to the technical field of power boxes, in particular to an intelligent power box and a monitoring system thereof.
Background
The concept of three-level power distribution and two-level protection of construction site power utilization is deep into the concept of each construction site manager. According to the technical specification of temporary power utilization safety of a construction site of the industry standard JGJ46-2005, the temporary power utilization of the construction site is divided into three-level power distribution of a main distribution box, a distribution box and a switch box, and two-level protection means that the main distribution box and the switch box are required to be provided with a leakage protection device. The three-level power box used in construction sites of construction enterprises in China has different characteristics in specification and size, outgoing line quantity, power size and the like, but the function composition is different, and although the three-level power box meets the national standard specification, the temporary power utilization safety accidents in the construction sites cannot be fundamentally avoided.
Therefore, in view of the above situation, there is an urgent need to develop an intelligent power box and a monitoring system thereof to overcome the shortcomings in the current practical application.
Disclosure of Invention
The invention aims to provide an intelligent power box and a monitoring system thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an intelligent power box comprises a box body; the box door is mounted on the front side and the rear side of the box body, the shielding plate and the mounting plate are mounted in the box body, one side, close to the mounting plate, of the shielding plate is used for mounting equipment, and the other side of the shielding plate is used for arranging conducting circuits; a plurality of mounting holes are uniformly formed in the shielding plate, and the shielding plate is used for shielding the connection between the wires inside the box body and the equipment.
As a further scheme of the invention: and wheels are mounted at dead corners of the bottom of the box body.
As a further scheme of the invention: disconnecting link and two intelligent earth-leakage protectors are arranged in the shape of Chinese character 'pin' on the mounting panel.
As a further scheme of the invention: disconnecting link and two intelligent earth-leakage protectors are arranged "one" style of calligraphy on the mounting panel.
As a further scheme of the invention: the box body is connected with the electric equipment and the power strip through the aviation plug.
The utility model provides a monitored control system of intelligent power supply box, includes management module, communication module and power supply box module, and management module passes through communication module and power supply box module wireless connection.
As a further scheme of the invention: the power box module comprises a data monitoring module, a signal transceiving module and a field alarm module which are arranged inside the box body, the data monitoring module and the signal transceiving module are connected with each other and are connected with the field alarm module, and the data monitoring module is used for monitoring equipment parameters inside the box body in real time.
As a further scheme of the invention: the device parameters include but are not limited to a voltage value, a current value, a power value and a cable temperature, and are sent to the signal receiving and sending module and the field alarm module, the signal receiving and sending module sends data to the management module through the communication transmission module, the field alarm module compares various device parameters with preset values, and the field alarm module gives an alarm to remind field workers of overhauling after the device parameters exceed the preset values within a certain range.
As a further scheme of the invention: the alarm mode of the on-site alarm module is acousto-optic alarm.
As a further scheme of the invention: the management module comprises a background monitoring end and a mobile end, and the background monitoring end and the mobile end are both in wireless connection with the communication transmission module and are used for receiving the equipment parameters sent by the power box module; the background monitoring end comprises a data statistics unit, a signal receiving and sending unit and a data analysis unit, wherein the data statistics unit and the data analysis unit are connected with the signal receiving and sending unit, and the data statistics unit is also connected with the data analysis unit.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, various parameters of equipment in the box body are monitored through the power box monitoring module, monitoring data are sent to the background monitoring end and the mobile end in real time, the equipment parameters are subjected to statistical analysis, and potential safety hazard accidents are pushed to related management personnel according to the analysis result, so that the purpose of finding potential safety hazards in advance and processing the potential safety hazards in time is achieved, and the convenience and the safety reliability of the use of electric equipment are improved.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent power box.
Fig. 2 is a sectional view of the smart power box.
Fig. 3 is a diagram of a panel layout in an intelligent power box.
Fig. 4 is another layout diagram of panels in an intelligent power box.
Fig. 5 is a block diagram of the structure of the intelligent power box monitoring system.
Fig. 6 is a block diagram of a background monitoring end in the monitoring system of the intelligent power box.
Fig. 7 is a block diagram of a power box monitoring module in the intelligent power box monitoring system.
In the figure:
1-a box body,
2-a box door,
3-a shielding plate,
4-mounting hole,
5-mounting plate,
6-knife switch,
7-intelligent leakage protector,
8-a management module,
81-background monitoring terminal,
811-data statistics Unit,
812-a signal transceiving unit,
813-data analysis unit,
82-a moving end,
9-a communication transmission module,
10-power box monitoring module,
101-a signal receiving and transmitting module,
102-data monitoring module,
103-a field alarm module.
Detailed Description
The technical solution of the present patent will be described in further detail with reference to the following embodiments.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Example 1
Referring to fig. 1-3, in an embodiment of the present invention, an intelligent power box includes a box body 1; the front side and the rear side of the box body 1 are both provided with box doors 2, a shielding plate 3 and a mounting plate 5 are arranged in the box body 1, one side, close to the mounting plate 5, of the shielding plate 3 is used for mounting equipment, and the other side of the shielding plate 3 is used for arranging conducting circuits; the shielding plate 3 is uniformly provided with a plurality of mounting holes 4, the shielding plate 3 is used for shielding the connection between the wires in the box body 1 and the equipment, and holes suitable for the equipment are reserved, so that the panels of the equipment such as the leakage protector and the like are exposed and convenient to operate;
specifically, in this embodiment, the dead corners at the bottom of the box body 1 are all provided with wheels (not shown in the figure), so as to facilitate the movement of the box body 1;
specifically, in this embodiment, the disconnecting link 6 and the two intelligent leakage protectors 7 on the mounting plate 5 are arranged in a shape like a Chinese character pin;
specifically, in this embodiment, the connection mode of the box body 1 and the power consumption device and the power strip is an aviation plug connection, the application range of the aviation plug in the market is relatively wide, and the application advantages are three points: 1. the installation is quick and simple; 2. when the power box is connected with the power box, tools are not needed, damage is avoided, and various defects of a screw compression joint method are avoided. 3. Firm connection and reliable contact. The large interface of the aviation plug contact surface has small volume, is not exposed, safe and not easy to corrode.
Example 2
Referring to fig. 1-3, in an embodiment of the present invention, an intelligent power box includes a box body 1; the front side and the rear side of the box body 1 are both provided with box doors 2, a shielding plate 3 and a mounting plate 5 are arranged in the box body 1, one side, close to the mounting plate 5, of the shielding plate 3 is used for mounting equipment, and the other side of the shielding plate 3 is used for arranging conducting circuits; the shielding plate 3 is uniformly provided with a plurality of mounting holes 4, the shielding plate 3 is used for shielding the connection between the wires in the box body 1 and the equipment, and holes suitable for the equipment are reserved, so that the panels of the equipment such as the leakage protector and the like are exposed and convenient to operate;
specifically, in this embodiment, the dead corners at the bottom of the box body 1 are all provided with wheels (not shown in the figure), so as to facilitate the movement of the box body 1;
specifically, in this embodiment, the disconnecting link 6 and the two intelligent leakage protectors 7 on the mounting plate 5 are arranged in a shape like a Chinese character pin;
specifically, in this embodiment, the connection mode of the box body 1 and the power consumption device and the power strip is an aviation plug connection, the application range of the aviation plug in the market is relatively wide, and the application advantages are three points: 1. the installation is quick and simple; 2. when the power box is connected with the power box, tools are not needed, damage is avoided, and various defects of a screw compression joint method are avoided. 3. Firm connection and reliable contact. The large interface of the aviation plug contact surface has small volume, is not exposed, safe and not easy to corrode.
Referring to fig. 4, the difference between the present embodiment and embodiment 1 is: the knife switch 6 and the two intelligent leakage protectors 7 are arranged in a straight shape on the mounting plate 5.
Example 3
Referring to fig. 1-3, in an embodiment of the present invention, an intelligent power box includes a box body 1; the front side and the rear side of the box body 1 are both provided with box doors 2, a shielding plate 3 and a mounting plate 5 are arranged in the box body 1, one side, close to the mounting plate 5, of the shielding plate 3 is used for mounting equipment, and the other side of the shielding plate 3 is used for arranging conducting circuits; the shielding plate 3 is uniformly provided with a plurality of mounting holes 4, the shielding plate 3 is used for shielding the connection between the wires in the box body 1 and the equipment, and holes suitable for the equipment are reserved, so that the panels of the equipment such as the leakage protector and the like are exposed and convenient to operate;
specifically, in this embodiment, the dead corners at the bottom of the box body 1 are all provided with wheels (not shown in the figure), so as to facilitate the movement of the box body 1;
specifically, in this embodiment, the disconnecting link 6 and the two intelligent leakage protectors 7 on the mounting plate 5 are arranged in a shape like a Chinese character pin;
specifically, in this embodiment, the connection mode of the box body 1 and the power consumption device and the power strip is an aviation plug connection, the application range of the aviation plug in the market is relatively wide, and the application advantages are three points: 1. the installation is quick and simple; 2. when the power box is connected with the power box, tools are not needed, damage is avoided, and various defects of a screw compression joint method are avoided. 3. Firm connection and reliable contact. The large interface of the aviation plug contact surface has small volume, is not exposed, safe and not easy to corrode.
Referring to fig. 4, embodiment 2 is different from embodiment 1 in that: the knife switch 6 and the two intelligent leakage protectors 7 are arranged in a straight shape on the mounting plate 5.
Referring to fig. 5-7, an intelligent power box monitoring system includes a management module 8, a communication module 9 and a power box module 10, the management module 8 is wirelessly connected with the power box module 10 through the communication module 9, the power box module 10 includes a data monitoring module 102, a signal transceiver module 101 and a field alarm module 103 installed inside a box body 1, the data monitoring module 102 and the signal transceiver module 101 are connected with each other and are connected with the field alarm module 103, the data monitoring module 102 is used for monitoring equipment parameters inside the box body 1 in real time, the equipment parameters include but are not limited to voltage values, current values, power values and cable temperatures, and send the equipment parameters to the signal transceiver module 101 and the field alarm module 103, the signal transceiver module 101 sends data to the management module 8 through the communication transmission module 9, the field alarm module 103 compares each equipment parameter with a preset value, and after the equipment parameter exceeds the preset value within a certain range, the field alarm module 103 alarms to remind field workers to overhaul;
specifically, in this embodiment, the alarm mode of the field alarm module 103 is an audible and visual alarm;
the management module 8 comprises a background monitoring terminal 81 and a mobile terminal 82, and both the background monitoring terminal 81 and the mobile terminal 82 are wirelessly connected with the communication transmission module 9 and used for receiving the equipment parameters sent by the power box module 10; the background monitoring terminal 81 comprises a data statistics unit 811, a signal transceiving unit 812 and a data analysis unit 813, wherein the data statistics unit 811 and the data analysis unit 813 are both connected with the signal transceiving unit 812, the data statistics unit 811 is also connected with the data analysis unit 813, the signal transceiving unit 812 receives the device parameters from the communication transmission module 9 and then sends the device parameters to the data statistics unit 811, the data statistics unit 811 performs statistics processing on the device parameters and then sends the device parameters to the data analysis unit 813, and the data analysis unit 813 analyzes the data and finds out the safety problem existing in the power utilization process of the device.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make several variations and modifications without departing from the concept of the present invention, and these should be considered as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.

Claims (10)

1. An intelligent power box comprises a box body (1); the box is characterized in that box doors (2) are mounted on the front side and the rear side of the box body (1), a shielding plate (3) and a mounting plate (5) are mounted inside the box body (1), one side, close to the mounting plate (5), of the shielding plate (3) is used for mounting equipment, and the other side of the shielding plate (3) is used for arranging conducting circuits; a plurality of mounting holes (4) are uniformly formed in the shielding plate (3), and the shielding plate (3) is used for shielding the joints of the wires and the equipment in the box body (1).
2. The intelligent power box according to claim 1, characterized in that wheels are mounted at the dead corners of the bottom of the box body (1).
3. The intelligent power box according to claim 1, wherein the knife switch (6) and the two intelligent earth leakage protectors (7) on the mounting plate (5) are arranged in a shape like a Chinese character 'pin'.
4. The intelligent power box according to claim 1, characterized in that the knife switch (6) and the two intelligent earth leakage protectors (7) on the mounting plate (5) are arranged in a shape of a Chinese character 'yi'.
5. The intelligent power box according to claim 1, characterized in that the connection mode of the box body (1) with the electric equipment and the power strip is an aviation plug connection.
6. The monitoring system of the intelligent power box as claimed in any one of claims 1 to 5, comprising a management module (8), a communication module (9) and a power box module (10), wherein the management module (8) is wirelessly connected with the power box module (10) through the communication module (9).
7. The monitoring system of the intelligent power box according to claim 6, wherein the power box module (10) comprises a data monitoring module (102), a signal transceiver module (101) and a field alarm module (103) which are installed inside the box body (1), the data monitoring module (102) and the signal transceiver module (101) are connected with each other and are connected with the field alarm module (103), and the data monitoring module (102) is used for monitoring equipment parameters inside the box body (1) in real time.
8. The monitoring system of the intelligent power box according to claim 7, wherein the equipment parameters include but are not limited to a voltage value, a current value, a power value and a cable temperature, and are sent to the signal transceiver module (101) and the field alarm module (103), the signal transceiver module (101) sends data to the management module (8) through the communication transmission module (9), the field alarm module (103) compares each equipment parameter with a preset value, and the field alarm module (103) alarms to remind field workers to overhaul after the equipment parameters exceed the preset value to a certain extent.
9. The monitoring system of the intelligent power box as claimed in claim 8, wherein the alarm mode of the on-site alarm module (103) is an audible and visual alarm.
10. The monitoring system of the intelligent power box according to claim 9, wherein the management module (8) comprises a background monitoring terminal (81) and a mobile terminal (82), and the background monitoring terminal (81) and the mobile terminal (82) are both wirelessly connected with the communication transmission module (9) and are used for receiving the device parameters sent by the power box module (10); the background monitoring terminal (81) comprises a data statistics unit (811), a signal transceiving unit (812) and a data analysis unit (813), wherein the data statistics unit (811) and the data analysis unit (813) are both connected with the signal transceiving unit (812), and the data statistics unit (811) is also connected with the data analysis unit (813).
CN202010606315.6A 2020-06-29 2020-06-29 Intelligent power box and monitoring system thereof Pending CN111900636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010606315.6A CN111900636A (en) 2020-06-29 2020-06-29 Intelligent power box and monitoring system thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010606315.6A CN111900636A (en) 2020-06-29 2020-06-29 Intelligent power box and monitoring system thereof

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Publication Number Publication Date
CN111900636A true CN111900636A (en) 2020-11-06

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204290107U (en) * 2014-12-30 2015-04-22 北京陆平电气有限公司 Low-tension distribution box
JP2015089308A (en) * 2013-11-01 2015-05-07 株式会社日立産機システム Distribution board
CN205646534U (en) * 2016-05-30 2016-10-12 新乡学院 Distribution box
CN205960796U (en) * 2016-08-26 2017-02-15 青岛依爱通信设备有限公司 Accurate AC distribution automatic fire extinguishing system
CN106771791A (en) * 2017-03-27 2017-05-31 南宁市茂宏信息技术有限公司 HV switchboard online detection system
CN206542090U (en) * 2017-03-21 2017-10-03 安阳市金科电气有限公司 A kind of protection type maintenance power box

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015089308A (en) * 2013-11-01 2015-05-07 株式会社日立産機システム Distribution board
CN204290107U (en) * 2014-12-30 2015-04-22 北京陆平电气有限公司 Low-tension distribution box
CN205646534U (en) * 2016-05-30 2016-10-12 新乡学院 Distribution box
CN205960796U (en) * 2016-08-26 2017-02-15 青岛依爱通信设备有限公司 Accurate AC distribution automatic fire extinguishing system
CN206542090U (en) * 2017-03-21 2017-10-03 安阳市金科电气有限公司 A kind of protection type maintenance power box
CN106771791A (en) * 2017-03-27 2017-05-31 南宁市茂宏信息技术有限公司 HV switchboard online detection system

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