CN211348512U

CN211348512U - Monitor is put in embedded office of wave filter

Info

Publication number: CN211348512U
Application number: CN201922201193.8U
Authority: CN
Inventors: 史立余; 何川; 张祖泷; 张治新; 于涵
Original assignee: Shanghai Oumai Electric Inspection Co ltd
Current assignee: Shanghai Oumai Electric Inspection Co ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-08-25
Anticipated expiration: 2029-12-10

Abstract

The utility model provides a monitor is put in embedded office of wave filter, the monitor is put in office has the PCB board, the ground wire of bed layer as the monitor on the PCB board, the wave filter includes metal casing, two lead wires are drawn forth on the metal casing, and wherein 1 lead wire is as the signal input wiring, on the input signal welding point on the PCB board that the monitor was put in office to the signal input wiring connection, another lead wire was as the signal output wiring, on the output signal welding point on the PCB board that the monitor was put in office to the signal output wiring connection, metal casing with bed layer in close contact with on the PCB board. The utility model provides a monitor is put in embedded office of wave filter compares in external wave filter, and the performance is more firm, and it is more convenient to install and use.

Description

Monitor is put in embedded office of wave filter

Technical Field

The utility model relates to a monitor is put in office specifically, relates to a monitor is put in embedded office of wave filter.

Background

The GIS (gas INSULATED switchgear) gas INSULATED totally-enclosed combination comprises a breaker, a disconnecting switch, a grounding switch, a mutual inductor, a lightning arrester, a bus, a connecting piece, an outgoing line terminal and the like, wherein all the equipment or parts are enclosed in a metal grounded shell, and SF6 insulating gas with certain pressure is filled in the metal grounded shell. GIS partial discharge, hereinafter referred to as partial discharge, is a discharge that is caused by electric field concentration in an insulated portion. When partial discharge occurs, an ultrahigh frequency signal is generated, and the insulated partial discharge condition can be obtained by monitoring an ultrahigh frequency electromagnetic wave signal of 300MHz to 1500 MHz.

In the GIS partial discharge online monitoring system, a partial discharge sensor is connected to a partial discharge monitor through a high-frequency signal line to perform signal processing. In practical applications, due to the presence of communication signals of various frequencies in the air, when the frequencies of the signals are also between 300MHz and 1500MHz, interference is generated on the local discharge monitoring. In various communication signals, signal influence of a mobile phone frequency range of 860MHz-965MHz generally exists, and misjudgment of an office amplifier signal is easily formed. The signals in this band are mainly filtered out.

In general application of the partial discharge monitor, a filter is externally connected to filter signals of a frequency band of a mobile phone.

In the local discharge online monitoring system in the prior art, the external filter is used in a method that after all monitors work and operate, an external filter is added between a UHF (ultra high frequency) sensor and a signal processing board of the monitor only when background noise caused by mobile phone signal interference is large to a set threshold value.

Above-mentioned mode, the first fixed problem of installation that exists, current external filter generally has two SMA interfaces in both ends, and one is the signal input interface, and one is the signal output interface, does not have other installation fixed orificess, and the installation of whole filter is fixed all to be supported through the SMA joint, has become insecure easily after the time. Second, because of the temporary installation on site, it is not the size designed before the project and sometimes conflicts with other existing equipment or mounting bracket locations nearby.

In addition, the problem exists that no sensor of an external filter is added after the first installation and debugging on the site, but in the actual use process, the influence of a signal of a new mobile phone frequency band cannot be ensured, so that the method is limited in use.

SUMMERY OF THE UTILITY MODEL

To the defect that exists among the above-mentioned prior art, the utility model aims at providing a wave filter, embedded inside the monitor is put in the office, compares in external wave filter, and the performance is more firm, and it is more convenient to install and use.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

the utility model provides a monitor is put in embedded office of wave filter, the monitor is put in the office has the PCB board, the ground wire as the monitor of the bed layer on the PCB board, the wave filter includes metal casing, two leads are drawn forth on the metal casing, and wherein 1 lead wire is as signal input wiring, on signal input wiring is connected to the input signal welding point on the PCB board of monitor is put in the office, another lead wire is as signal output wiring, on the output signal welding point on the PCB board of monitor is put in the office to signal output wiring is connected to the office, metal casing with bed layer in close contact with on the PCB board.

One surface of the metal shell serves as a mounting surface, a threaded hole is formed in the mounting surface, the metal shell is mounted on a ground layer on the PCB through a screw, and the threaded hole, the screw and the ground layer on the PCB are electrically connected.

The installation surface is provided with 4 symmetrical threaded holes and is installed on a paving layer on the PCB through 4 screws.

The metal shell is a cuboid, and the mounting surface is a surface with a length and a width.

The two leads are respectively led out from two opposite surfaces of the metal shell where the width and the height are located.

Compared with the prior art, the utility model discloses following beneficial effect has:

through setting up embedded filter, solved external filter time and had connected not firm problem for a long time, also can not receive the restriction of on-the-spot mounted position and installation occasion. Meanwhile, once the influence of a new mobile phone signal appears in later-stage use, the field installation condition does not need to be considered again, and a solution is temporarily adopted.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a view of the filter mounted on a PCB;

fig. 2 is a schematic diagram of the filter installed inside the partial discharge monitor.

Detailed Description

The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

Fig. 1 and fig. 2 show, the utility model provides a monitor is put in embedded office of wave filter, this wave filter is used for filtering cell-phone frequency channel, compares in external wave filter, and the volume will be dwindled to in alright embedded monitor, and have the fixed mounting hole, can fixed mounting put inside the monitor in the office.

Usually, the filter externally arranged on the partial discharge monitor is installed and fixed on an SMA joint, a signal wire is arranged in the middle of the SMA joint, a metal shielding layer is arranged outside the signal wire, one shielding layer is used for shielding external interference, and the other shielding layer is used as a reference ground wire of a signal. And the utility model discloses a wave filter is embedded inside the monitor is put in the office, does not need the SMA interface, and the outside metal casing of monitor can play the shielding effect is put in the office, so ground connection is another problem that will solve.

The utility model discloses in the embodiment implementation process, the inside ground wire of monitor is the bed stratum on the PCB board, with the bed stratum in close contact with on wave filter shell and this PCB board to can regard the shell of wave filter as the reference ground wire of signal.

The implementation process is as follows:

the embedded filter is in a cuboid shape and is an independent module with a metal shell, metal connecting wires are led out from two opposite surfaces where the width and the height of the metal shell 1 are located, one connecting wire is a signal input connecting wire 3, and the other connecting wire is a signal output connecting wire 4. The filter passes through special equipment, namely whether the parameters of the network analyzer are qualified or not, the qualified filter enters the subsequent production, and the unqualified filter is tested after the parameters are adjusted until the parameters are qualified.

One surface of the filter metal shell 1 where the length and the width are located is a mounting surface, 4 symmetrical threaded holes 5 are formed in the mounting surface, and the filter metal shell is mounted on a PCB (printed circuit board) 2 in a monitor through 4 screws in use, so that the threaded holes 5, the screws and a ground layer 8 on the PCB are electrically connected.

The metal shell 1 of the filter is an electric good conductor, and the part of the PCB connected with the metal shell of the filter, namely the ground wire on the PCB, is not paved with a solder mask, so that the copper sheet on the PCB is in good contact with the metal shell of the filter.

After the filter is installed, the signal input wiring 3 and the signal output wiring 4 of the filter are respectively welded to the corresponding input signal welding point 6 and output signal welding point 7 on the PCB.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. The utility model provides an embedded local monitor of putting of wave filter, its characterized in that, the inside PCB board that has of monitor is put in the local, the ground wire as the monitor of the bed layer on the PCB board, the wave filter includes metal casing, two lead wires are drawn forth on the metal casing, and wherein 1 lead wire is as signal input wiring, on the input signal welding point on the PCB board that signal input wiring is connected to the monitor is put in the local, another lead wire is as signal output wiring, on the output signal welding point on the PCB board that signal output wiring is connected to the monitor is put in the local, metal casing with bed layer in close contact with on the PCB board.

2. The filter in-cell partial discharge monitor according to claim 1, wherein one surface of the metal housing is a mounting surface, the mounting surface is provided with a threaded hole, the metal housing is mounted on a ground layer of the PCB by a screw, and the threaded hole, the screw and the ground layer of the PCB are electrically connected.

3. The filter in-cell partial discharge monitor of claim 2, wherein the mounting surface has 4 symmetrical threaded holes for mounting to a ground layer on a PCB via 4 screws.

4. The filter in-line partial discharge monitor of claim 2, wherein the metal housing is a rectangular parallelepiped, and the mounting surface is a long and wide surface.

5. The filter in-line partial discharge monitor of claim 4, wherein the two leads are respectively led out from two sides of the metal shell, namely the width side and the height side.