CN215116516U

CN215116516U - Grounding resistance on-line monitoring appearance

Info

Publication number: CN215116516U
Application number: CN202120795329.7U
Authority: CN
Inventors: 宋利源; 卢敏
Original assignee: Henan Convergence Testing Research Institute Co Ltd
Current assignee: Henan Convergence Testing Research Institute Co Ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2021-12-10
Anticipated expiration: 2031-04-16

Abstract

The utility model belongs to the technical field of ground resistance monitoring, and provides a ground resistance on-line monitoring instrument, which comprises a monitoring instrument body, a power supply conversion module, a surge protector, a surge backup protector, a power supply connecting terminal, a RS485 connecting terminal and a measuring electrode connecting terminal which are arranged in a box body, wherein the power supply input end of the power supply conversion module is connected on the power supply connecting terminal, the power supply input end of the power supply connecting terminal is connected with a 220V power supply, the surge backup protector and the surge protector are sequentially connected on the power supply connecting terminal in series, the other end of the surge protector is grounded, the RS485 connecting terminal is connected with the RS485 interface of the monitor body, the input end of the measuring electrode connecting terminal is connected with the voltage pole, the current pole and the grounding pole of the monitor body, the monitor body comprises a single chip microcomputer, a monitoring circuit and an RS485 circuit, wherein the monitoring circuit is electrically connected with the single chip microcomputer; the utility model discloses can realize the on-line monitoring of ground resistance value and upload to the host computer.

Description

Grounding resistance on-line monitoring appearance

Technical Field

The utility model belongs to the technical field of ground resistance monitoring, specifically be a ground resistance on-line monitoring appearance.

Background

The ground resistance detector is commonly used for measuring the ground resistance of various ground systems such as power systems, electrical equipment and lightning protection equipment, and is commonly used for measuring the ground resistance. Most of the existing grounding resistance monitors are portable, managers regularly measure grounding resistance values of grounding systems, the portable grounding resistance monitors are convenient for the managers to measure the grounding resistance values of the grounding systems on site, but the grounding resistance measurement of the grounding systems is also temporary, in order to improve the safety and reliability of the grounding systems such as power systems, electrical equipment and lightning protection equipment, the regular grounding system measurement is needed, the grounding resistance measurement of the grounding system is convenient for indoor electrical equipment, but for outdoor power systems and lightning protection equipment, the grounding system is far away, even the ground potential is severe, the managers frequently measure the grounding resistance on site, on one hand, the workload is large, and on the other hand, the risk factor is high.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model provides an earth resistance on-line monitoring appearance has solved the problem of proposing among the above-mentioned background art.

The utility model provides a ground resistance on-line monitoring appearance, is including setting up monitor body, power conversion module, surge protector, surge backup protector, power binding post, RS485 binding post and measuring electrode binding post in the box, power conversion module's power input end is connected on power binding post, power binding post's power input end connects the 220V power, and power conversion module will the 220V power conversion is 12V power does the power supply of monitor body, surge backup protector and surge protector establish ties on power binding post in proper order, surge protector's the other end ground connection, RS485 binding post is connected on the RS485 interface of monitor body, measuring electrode binding post's input is connected on the voltage utmost point, current pole, the earth electrode of monitor body, the monitor body includes singlechip, and the monitoring circuit is electrically connected with the singlechip and the RS485 circuit.

Further, be provided with nearly style of calligraphy installation skeleton in the box, install the mounting panel on nearly style of calligraphy installation skeleton, monitor body, power conversion module, surge protector, surge backup protector, power binding post, RS485 binding post and measuring electrode binding post are all installed on the mounting panel.

Furthermore, the lower extreme of box is provided with the corrugated pipe joint who is used for wearing to establish the circuit.

Further, the open end of the box body is hinged with an openable door plate, and the door plate is provided with a door lock.

Further, the monitoring circuit comprises a 1.34kHz square wave generator, a square wave amplitude adjusting circuit, a square wave sine wave conversion circuit, a sine wave power amplifying circuit, a voltage current transformer, a signal primary amplifier, a post-stage signal conditioning circuit and a packet route monitoring wave circuit box signal sampling circuit, wherein the square wave generator, the square wave amplitude adjusting circuit, the square wave sine wave conversion circuit, the sine wave power amplifying circuit, the voltage current transformer, the signal primary amplifier, the post-stage signal conditioning circuit and the packet route monitoring wave circuit box signal sampling circuit are integrated on the integrated circuit board and connected with the single chip microcomputer, and the single chip microcomputer is further connected with a display screen installed on the shell and an operation key installed on the shell.

Furthermore, a power interface, a voltage electrode, a current electrode and a grounding electrode of the monitor body are all connected to the integrated circuit board.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses an integrated RS485 circuit and monitoring circuit with singlechip electric connection that have in the monitor body, thereby realize the transmission of realizing data through RS485 communication between monitor body and the host computer, and it is required operating voltage to convert 220V voltage into monitor body work through power conversion module, and realize the protection under the monitor body operating condition through surge protector and surge backup protector, thereby realize the long-time on-line monitoring work of monitor body, effectively improve ground resistance real-time supervision's efficiency, avoid the frequent measurement of carrying out ground resistance value to the scene of managers.

Drawings

Fig. 1 is a schematic structural view of the present invention;

wherein. 1. The monitoring instrument comprises a box body, 2, a monitoring instrument body, 3, a power supply conversion module, 4, a surge protector, 5, a surge backup protector, 6, a power supply wiring terminal, 7, an RS485 wiring terminal, 8, a measuring electrode wiring terminal, 9, a mounting plate, 10, a corrugated pipe joint, 11, a door plate, 13 and a door lock.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments, but not all embodiments of the present invention.

As shown in figure 1, an on-line ground resistance monitor comprises a monitor body 2, a power conversion module 3, a surge protector 4, a surge backup protector 5, a power terminal 6, an RS485 terminal 7 and a measuring electrode terminal 8 which are arranged in a box body 1, wherein the power input end of the power conversion module 3 is connected with the power terminal 6, the power input end of the power terminal 6 is connected with a 220V power supply, the 220V power supply is converted into a 12V power supply by the power conversion module 3 to supply power to the monitor body 2, the surge backup protector 5 and the surge protector 4 are sequentially connected with the power terminal in series, the other end of the surge protector 4 is grounded, the RS485 terminal 7 is connected with an RS485 interface of the monitor body 2, the other end of the RS485 terminal is contacted with an RS485 connecting wire, and the monitor body 2 is connected with an upper computer (namely a PC computer) through an FS485 connecting wire, the input of measuring electrode binding post 8 is connected on voltage utmost point, current utmost point, the earth electrode of monitor body 2, and measuring electrode binding post 8's the other end has the wiring end that corresponds voltage utmost point, current utmost point, earth electrode connecting wire respectively, monitor body 2 includes the singlechip, with singlechip electric connection's monitoring circuit and RS485 circuit.

In the embodiment, a n-shaped mounting framework is arranged in the box body 1, a mounting plate 9 is mounted on the n-shaped mounting framework, and the monitor body 2, the power conversion module 3, the surge protector 4, the surge backup protector 5, the power wiring terminal 6, the RS485 wiring terminal 7 and the measuring electrode wiring terminal 8 are all mounted on the mounting plate 9; the monitoring instrument is characterized in that the n-shaped mounting framework is made of non-conductive hard materials such as plastics, the n-shaped mounting framework is fixed in an inner cavity of the box body 1 through bolts, the mounting plate 9 is fixed on the n-shaped mounting framework through bolts, and the monitoring instrument body 2, the power supply conversion module 3, the surge protector 4, the surge backup protector 5, the power supply wiring terminal 6, the RS485 wiring terminal 7 and the measuring electrode wiring terminal 8 are all mounted on the mounting plate 9 through bolts.

In this embodiment, the lower end of the box body 1 is provided with a plurality of waterproof corrugated pipe joints 10 for passing a circuit, and the plurality of corrugated pipe joints 10 are respectively used for passing a power line, a ground line and an electrode connecting line.

In this embodiment, the open end of the box body 1 is hinged with an openable door panel 11, the door panel 11 is provided with a door lock 13, and after the components on the mounting plate 9 are connected, the door panel 11 is closed and locked by the door lock 13.

In the embodiment, the monitoring circuit comprises a 1.34kHz square wave generator, a square wave amplitude adjusting circuit, a square wave sine wave conversion circuit, a sine wave power amplifying circuit, a voltage current transformer, a signal primary amplifier, a post-stage signal conditioning circuit and a packet route monitoring wave circuit box signal sampling circuit which are integrated on an integrated circuit board and connected with a single chip microcomputer, and the single chip microcomputer is also connected with a display screen arranged on a shell and an operation key arranged on the shell; 1.34kHz square wave generator, square wave amplitude regulating circuit, square wave sine wave converting circuit, sine wave power amplifier circuit, voltage current transformer, the primary amplifier of signal, back level signal conditioning processing, package route monitoring ripples circuit box signal sampling circuit and the concrete connected mode and the theory of operation of singlechip are prior art, for example the chinese utility model patent that the publication number is 206281902U of authorizing, the singlechip is also not prior art with being connected of display screen, button, and this embodiment is no longer repeated.

In this embodiment, the power interface, the voltage electrode, the current electrode, and the ground electrode of the monitor body 2 are all connected to the integrated circuit board.

In this embodiment, the RS485 circuit may be an RS485 communication line, which is conventional in the field, or an RS232 circuit, as long as data transmission between the monitor body 2 and the upper computer can be achieved.

The utility model discloses when using, with power conversion module 3 access 220V municipal power, the required 12V voltage of monitor body 2 during operation is exported after the conversion of 220V municipal power supply income power conversion module 3, after monitor body 2 connects the voltage utmost point, current pole, the earthing pole that the corresponding access ground through measuring electrode binding post 8, monitors earth resistance all the time, and show the monitoring result through the display screen, upload to the host computer through the RS485 connecting wire simultaneously; the surge back protector 5 and the surge protector 4 connected to the power supply terminal 6 perform lightning protection on the monitor body 2, so that the monitor body 2 is prevented from being damaged by lightning; when the device is used specifically, the periodic monitoring of the grounding resistance value and the timed uploading of the monitoring result can be realized through the internal clock of the single chip microcomputer.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an earth resistance on-line monitoring appearance which characterized in that: comprises a monitor body, a power conversion module, a surge protector, a surge backup protector, a power connecting terminal, an RS485 connecting terminal and a measuring electrode connecting terminal which are arranged in a box body, the power input end of the power supply conversion module is connected with a power supply connecting terminal, the power input end of the power supply connecting terminal is connected with a 220V power supply, the power supply conversion module converts the 220V power supply into a 12V power supply to supply power for the monitor body, the surge backup protector and the surge protector are sequentially connected in series on the power supply wiring terminal, the other end of the surge protector is grounded, the RS485 connecting terminal is connected with the RS485 interface of the monitor body, the input end of the measuring electrode connecting terminal is connected with the voltage pole, the current pole and the grounding pole of the monitor body, the monitor body includes singlechip, and with singlechip electric connection's monitoring circuit and RS485 circuit.

2. The ground resistance on-line monitor of claim 1, characterized in that: be provided with nearly style of calligraphy installation skeleton in the box, install the mounting panel on nearly style of calligraphy installation skeleton, monitor body, power conversion module, surge protector, surge backup protector, power binding post, RS485 binding post and measuring electrode binding post are all installed on the mounting panel.

3. The ground resistance on-line monitor of claim 1, characterized in that: the lower end of the box body is provided with a corrugated pipe joint for penetrating a line.

4. The ground resistance on-line monitor of claim 1, characterized in that: the opening end of the box body is hinged with an openable door plate, and the door plate is provided with a door lock.

5. The ground resistance on-line monitor of claim 1, characterized in that: the monitoring circuit comprises a 1.34kHz square wave generator, a square wave amplitude adjusting circuit, a square wave sine wave conversion circuit, a sine wave power amplifying circuit, a voltage current transformer, a signal primary amplifier, a post-stage signal conditioning circuit and a packet route monitoring wave circuit box signal sampling circuit, wherein the square wave generator, the square wave amplitude adjusting circuit, the square wave sine wave conversion circuit, the sine wave power amplifying circuit, the voltage current transformer, the signal primary amplifier, the post-stage signal conditioning circuit and the packet route monitoring wave circuit box signal sampling circuit are integrated on an integrated circuit board and connected with a single chip microcomputer, and the single chip microcomputer is further connected with a display screen installed on a shell and an operation key installed on the shell.

6. The ground resistance on-line monitor of claim 5, characterized in that: the power interface, the voltage pole, the current pole and the grounding pole of the monitor body are all connected with the integrated circuit board.