CN212410755U

CN212410755U - Low-current grounding line selection device

Info

Publication number: CN212410755U
Application number: CN202021032965.6U
Authority: CN
Inventors: 孙换春; 张长安; 张华�; 张倚侨; 屈炫
Original assignee: Yan'an Power Supply Branch Of Shaanxi Local Power Group Co ltd
Current assignee: Yan'an Power Supply Branch Of Shaanxi Local Power Group Co ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2021-01-26
Anticipated expiration: 2030-06-08

Abstract

The utility model discloses a small current grounding line selection device, which comprises a case body and a grounding line selection module arranged in the case body; the front side surface of the case body is provided with a mounting port, the bottom wall of the mounting port is hinged with a mounting plate capable of opening and closing the mounting port, and the outer surface of the mounting plate is provided with a display screen and a control button which are electrically connected with the grounding line selection module; a communication serial port is arranged on the outer surface of the mounting plate and below the display screen; the grounding line selection module is arranged in the case body, and the mounting port is arranged on the front side surface of the case body and is opened and closed through the rotation of the mounting plate, so that the maintenance or the replacement of corresponding parts are more convenient for technicians; the communication serial port can be used for connecting corresponding communication equipment to acquire data, and convenience of data calling is improved.

Description

Low-current grounding line selection device

Technical Field

The utility model relates to a current ground connection technical field, concretely relates to undercurrent ground connection route selection device.

Background

The small-current grounding line selection device is suitable for a power distribution network system with a neutral point of a voltage level of 66kV or below and grounded through a resistor and an arc suppression coil, can be widely applied to power supply systems of large-scale plant enterprises such as transformer substations, power plants, hydropower stations, petroleum, chemical engineering, metallurgy, coal, railways and the like, can accurately detect and isolate a line with a single-phase grounding fault in the system, and can be matched with a matched small-current intelligent insulation monitoring system to realize monitoring and early warning of the insulation state of the line.

The existing single-phase grounding line selection device mostly adopts a single chip microcomputer or a common industrial personal computer platform, the single chip microcomputer platform cannot meet the calculation requirement of a line selection algorithm due to low performance, and the line selection accuracy is low; the fan, the mechanical hard disk and the like in the common industrial personal computer belong to vulnerable parts, the situations of fan halt due to faults, hard disk damage and the like can occur when the industrial personal computer runs for 1 year in industrial fields, particularly in places with serious dust pollution, and the like, and the maintenance is not easy to carry out due to the inconvenience in structure disassembly and assembly.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims to provide a undercurrent ground connection route selection device is convenient for maintain and overhaul improve equipment operating stability to equipment.

The utility model adopts the technical proposal that: a low-current grounding line selection device comprises a case body and a grounding line selection module arranged in the case body; the front side surface of the case body is provided with an installation opening, the bottom wall of the installation opening is hinged with an installation plate capable of opening and closing the installation opening, and the upper edge of the installation plate is provided with a fixing mechanism fixed on the edge of the top wall of the installation opening; the outer surface of the mounting plate is provided with a display screen and a control button which are electrically connected with the grounding line selection module; a communication serial port is arranged on the outer surface of the mounting plate and below the display screen; and a connecting terminal row connected with the grounding line selection module is embedded in the rear side surface of the case body.

In the technical scheme: the grounding line selection module is internally arranged in the case body, the mounting port is formed in the front side face of the case body, the mounting port is opened and closed through rotation of the mounting plate, so that the corresponding parts can be maintained or replaced more conveniently by technicians, and the mounting plate is prevented from being opened randomly through the fixing mechanism when being closed. And the grounding line selection module arranged in the case body is connected with a corresponding grounding line selection circuit in the power grid through the connecting terminal row. In order to facilitate control, the display screen on the surface of the mounting plate can display corresponding grounding line selection parameters and can be adjusted through a control button; the communication serial port can be used for connecting corresponding communication equipment to acquire data, and convenience of data calling is improved.

Preferably, the installing port edge is provided with a positioning groove matched with the installing plate edge in a clamping manner, and the surface of the positioning groove is attached with a sealing dustproof pad.

Preferably, the front end of the case body is provided with fixing parts corresponding to the two horizontal sides of the mounting port, and the fixing parts are provided with fixing screw holes.

Preferably, the case body is provided with heat dissipation windows on two outer side faces corresponding to the mounting plate, the dust-proof net is fixed in the heat dissipation windows, and the dust-proof blocking pieces fixed on the outer side faces of the case body are arranged above the heat dissipation windows.

Preferably, the fixing mechanism comprises fixing buckles horizontally arranged on the mounting plate at intervals, and a mounting lockset is arranged between the two fixing buckles positioned in the middle of the mounting plate.

Preferably, the rear side face of the case body is provided with a terminal strip mounting groove, the connecting terminal strip is embedded in the terminal strip mounting groove, the terminal strip mounting groove is provided with a baffle capable of vertically sliding up and down, and two sides of the baffle are in sliding fit with the side wall of the terminal strip mounting groove.

Preferably, the lower end of the case body is provided with a zero sequence current transformer assembly connected with the grounding line selection module, the zero sequence current transformer assembly comprises a zero sequence current transformer body and a conductor, and the conductor is provided with a multi-phase conducting bar penetrating through the current transformer body; the outer side of the zero sequence current transformer body is provided with a U-shaped fixed arm, and two ends of the fixed arm are in threaded connection with two sides of the zero sequence current transformer body.

Preferably, the grounding line selection module is connected with an alarm, the alarm is installed on the inner side wall of the case body, and the side face of the case body is provided with sound raising holes arranged opposite to the alarm.

Preferably, a plurality of status indicator lamps connected with the grounding line selection module are mounted on the outer surface of the mounting plate.

The utility model has the advantages that: the small-current grounding wire selecting device provided by the utility model is more convenient for maintaining and repairing equipment, and can effectively prevent pollutants such as dust and the like from entering the machine case body to damage parts, and has the characteristics of high wire selecting accuracy, good performance, and the like when in use; the utility model discloses rational in infrastructure, whole device convenient to use, and ensured user's safety in utilization from many aspects, had very high practicality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a front view of a low-current grounding line selection device according to a first embodiment of the present invention.

Fig. 2 is a rear view of a low-current grounding line selection device according to a first embodiment of the present invention.

Fig. 3 is a zero sequence current transformer assembly structure diagram of a small current grounding line selection device according to a first embodiment of the present invention.

Reference numerals: chassis body 100, terminal strip mounting groove 110, mounting panel 200, control button 300, display screen 400, communication serial port 500, heat dissipation window 600, fixed part 700, fixing screw hole 800, status indicator lamp 900, fixing buckle 1000, installation tool to lock 1100, sound-raising hole 1200, baffle 1300, connecting terminal strip 1400, fixed arm 1500, heterogeneous conducting strip 1600, zero sequence current transformer body 1700.

Detailed Description

Here, it is to be noted that the functions, methods, and the like related to the present invention are only conventional adaptive applications of the related art. Therefore, the present invention is an improvement of the prior art, and substantially lies in the connection relationship between hardware. The present invention is described for better illustration of the function and method for better understanding of the present invention.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

As shown in fig. 1 to fig. 3, the low-current grounding line selection device provided in this embodiment includes a chassis body 100 and a grounding line selection module disposed in the chassis body 100; the front side surface of the case body 100 is provided with an installation opening, the bottom wall of the installation opening is hinged with an installation plate 200 capable of opening and closing the installation opening, and the upper edge of the installation plate 200 is provided with a fixing mechanism fixed on the edge of the top wall of the installation opening; the outer surface of the mounting plate 200 is provided with a display screen 400 and a control button 300 which are electrically connected with the grounding line selection module; a communication serial port 500 is further arranged on the outer surface of the mounting plate 200 below the display screen 400; the rear side surface of the case body 100 is embedded with a connection terminal row 1400 connected with the ground line selection module.

In this embodiment, the grounding line selection module is embedded in the case body 100, and the mounting opening is formed in the front side surface of the case body 100 and is opened and closed through the rotation of the mounting plate 200, so that the maintenance or replacement of corresponding parts by technicians is facilitated, and the fixing mechanism is used for fixing when the mounting plate 200 is closed. After the installation is completed, the grounding line selection module in the chassis body 100 is connected to the corresponding grounding line selection circuit in the power grid through the connection terminal row 1400. The grounding line selection module selects a microprocessor multi-CPU system, multi-channel signals are acquired simultaneously by combining various novel technologies, and the acquisition system works independently without occupying the working time of the main CPU, so that the grounding line selection module has the characteristics of high acquisition speed, high interference resistance and the like.

As shown in fig. 1 to 3, for the convenience of control, the display screen 400 on the surface of the mounting board 200 of the present embodiment can display corresponding ground line selection parameters, and can be adjusted by the control button 300; the communication serial port 500 may be used to connect a corresponding communication device to acquire data, such as a printing device or a data transmission device.

In this embodiment, the control button 300 specifically includes a reset button, a stop button, a cancel button, a confirm button, an up arrow button, and a down arrow button, and the reset button, the stop button, the cancel button, the confirm button, the up arrow button, and the down arrow button are respectively electrically connected to the microprocessor of the ground line selection module. The display can be a color liquid crystal display, so that the real-time display of the device is completed, and a friendly human-computer interaction interface is provided; whichever is adjusted by the technician.

As before, because installing port accessible mounting panel 200 realizes the switching, lead to the installing port edge to have the clearance, and then reduced dustproof effect, this embodiment is equipped with the constant head tank with the marginal block adaptation of mounting panel 200 at the installing port edge, the laminating of constant head tank surface has sealed dustproof pad. When the installing port is closed to mounting panel 200, in the edge embedding constant head tank of mounting panel 200, can improve the fixed stability of mounting panel 200 on the one hand, on the other hand can prevent that the dust from getting into the installing port, can further improve dustproof effect under the effect of sealed dustproof pad simultaneously.

As shown in fig. 1 to 3, in order to facilitate installation of the whole device, in the present embodiment, fixing portions are disposed at two sides of the front end of the chassis body 100 corresponding to the horizontal installation port, and the fixing portions are provided with fixing screw holes 800. Through set up fixed screw 800 on the fixed part and can realize fixing whole equipment in relevant position with the spiro union mode, improve equipment fixing's stability.

As shown in fig. 1 to fig. 3, since the grounding line selection module inevitably generates heat during operation, in order to improve the heat dissipation effect of the device, the case body 100 is provided with heat dissipation windows 600 on two outer side surfaces corresponding to the mounting plate 200 in the embodiment, a dust screen is fixed in the heat dissipation windows 600, and dust-proof blocking pieces fixed on the outer side surfaces of the case body 100 are arranged above the heat dissipation windows 600. The heat dissipation window 600 can improve the heat dissipation effect of the device, and the dust can be prevented from entering the case body 100 from the heat dissipation window 600 by arranging the dust screen and the dust-proof blocking piece.

As mentioned above, the device is opened and closed through the installation opening to realize quick opening of the device, so as to facilitate maintenance, when the installation opening is closed, the firmness of the installation opening closing should be ensured, in the embodiment, the fixing mechanism comprises fixing buckles 1000 horizontally arranged on the installation plate 200 at intervals, and an installation lock 1100 is arranged between the two fixing buckles 1000 positioned in the middle of the installation plate 200. The fixing buckle 1000 can stably fix the mounting plate 200 in the mounting port, and the installation lockset 1100 can prevent equipment from being opened, so that the running safety of the equipment is improved.

As shown in fig. 1 to 3, since the ground selecting circuit is connected to the connecting terminal strip 1400 when being connected, in order to facilitate the connection, the rear side surface of the housing body 100 of the present embodiment is provided with a terminal strip installation groove 110, the connecting terminal strip 1400 is embedded in the terminal strip installation groove 110, the terminal strip installation groove 110 is provided with a baffle 1300 capable of vertically sliding up and down, and two sides of the baffle 1300 are slidably fitted to the side walls of the terminal strip installation groove 110. In this way, the corresponding ground routing line can be stably connected to the connection terminal block 1400, and the terminal block installation groove 110 can be closed by the barrier 1300 when not connected.

In this embodiment, a zero sequence current transformer assembly connected to the ground line selection module is further disposed at the lower end of the chassis body 100, and the zero sequence current transformer assembly includes a zero sequence current transformer body 1700 and a conductor, and the conductor is provided with a multi-phase conducting bar 1600 passing through the current transformer body; the outer side of the zero sequence current transformer body 1700 is provided with a U-shaped fixed arm 1500, and two ends of the fixed arm 1500 are screwed on two sides of the zero sequence current transformer body 1700. The multi-phase conducting bar 1600 can improve the universality of equipment installation, and the U-shaped fixed arm 1500 can support the heavy zero-sequence current transformer without deformation, so that the installation stability can be improved.

As shown in fig. 1 to 3, in order to improve the operation safety, in this embodiment, an alarm is connected to the ground line selection module, the alarm is installed on the inner side wall of the chassis body 100, and a sound-raising hole 1200 arranged opposite to the alarm is provided on the side surface of the chassis body 100. The alarm can be done in order to remind the technical staff with the alarm sound when improper operation, avoids misoperation.

As shown in fig. 1 to 3, a plurality of status indicators 900 connected to the ground line selection module are mounted on the outer surface of the mounting plate 200. The status indicator lamp 900 should include a power indicator lamp, a communication indicator lamp, and a ground indicator lamp in order to display the current status of the device.

In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. A low-current grounding line selection device comprises a case body (100) and a grounding line selection module arranged in the case body (100); the method is characterized in that:

the front side surface of the case body (100) is provided with an installation opening, the bottom wall of the installation opening is hinged with an installation plate (200) capable of opening and closing the installation opening, and the upper edge of the installation plate (200) is provided with a fixing mechanism fixed on the edge of the top wall of the installation opening; a display screen (400) and a control button (300) which are electrically connected with the grounding line selection module are arranged on the outer surface of the mounting plate (200); a communication serial port (500) is further arranged on the outer surface of the mounting plate (200) below the display screen (400); and a connecting terminal row (1400) connected with the grounding line selection module is embedded in the rear side surface of the case body (100).

2. A low current ground selection device according to claim 1, wherein: the installing port edge is equipped with the constant head tank with mounting panel (200) edge block adaptation, the constant head tank surface laminating has sealed dustproof pad.

3. A low current ground selection device according to claim 1, wherein: case body (100) are equipped with radiator window (600) on two lateral surfaces that correspond mounting panel (200), radiator window (600) internal fixation has the dust screen, radiator window (600) top is equipped with the dustproof separation blade of fixing on case body (100) lateral surface.

4. A low current ground selection device according to claim 1, wherein: the front end of the case body (100) is provided with fixing parts corresponding to the two horizontal sides of the mounting port, and the fixing parts are provided with fixing screw holes (800).

5. A low current ground selection device according to claim 1, wherein: the fixing mechanism comprises fixing buckles (1000) horizontally arranged on the mounting plate (200) at intervals, and a mounting lock (1100) is arranged between the two fixing buckles (1000) positioned in the middle of the mounting plate (200).

6. A low current ground selection device according to claim 1, wherein: the rear side face of the case body (100) is provided with a terminal strip installation groove (110), the connecting terminal strip (1400) is embedded in the terminal strip installation groove (110), a baffle (1300) capable of vertically sliding up and down is arranged on the terminal strip installation groove (110), and two sides of the baffle (1300) are in sliding fit with the side wall of the terminal strip installation groove (110).

7. A low current ground selection device according to claim 1, wherein: the lower end of the case body (100) is provided with a zero sequence current transformer assembly connected with the grounding line selection module, the zero sequence current transformer assembly comprises a zero sequence current transformer body (1700) and a conductor, and the conductor is provided with a multi-phase conducting bar (1600) penetrating through the current transformer body; the outer side of the zero sequence current transformer body (1700) is provided with a U-shaped fixed arm (1500), and two ends of the fixed arm (1500) are in threaded connection with two sides of the zero sequence current transformer body (1700).

8. A low current ground selection device according to claim 1, wherein: the grounding line selection module is connected with an alarm, the alarm is installed on the inner side wall of the case body (100), and sound raising holes (1200) which are arranged opposite to the alarm are formed in the side face of the case body (100).

9. A low current ground selection device according to claim 1, wherein: and a plurality of status indicator lamps (900) connected with the grounding line selection module are arranged on the outer surface of the mounting plate (200).