CN114258223B

CN114258223B - Sensor

Info

Publication number: CN114258223B
Application number: CN202111595813.6A
Authority: CN
Inventors: 黄穗雯; 曾力; 王云龙; 肖云; 王俊星; 杨韬; 陈晓静; 王曹
Original assignee: Guangdong Power Grid Co Ltd; Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Guangdong Power Grid Co Ltd; Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2024-04-30
Anticipated expiration: 2041-12-24
Also published as: CN114258223A

Abstract

The invention belongs to the technical field of sensors, and discloses a sensor, wherein the bottom end surface of a sensor base is of a cambered surface structure, so that the bonding compactness of the sensor base and the outer wall of a GIS basin can be effectively improved; the base, the shell and the signal connector of the sensor are all wrapped in the shielding cover, so that interference signals can be prevented from being transmitted through the signal connector; the shielding cover adopts flexible material, when wrapping up base, casing and signal connection, can laminate compacter with base, casing and signal connection. Therefore, the sensor provided by the invention can effectively reduce the interference signal transmission probability and has the effect of improving the accuracy of GIS partial discharge test.

Description

Sensor

Technical Field

The invention relates to the technical field of sensors, in particular to a sensor.

Background

The gas insulated substation (Gas Insulated Substation, GIS) is widely applied due to the characteristics of small occupied area, excellent technical performance and the like, and the GIS partial discharge test is an important means for ensuring the safe and reliable operation of the GIS. During the test, an ultrahigh frequency external sensor is needed, and the bottom of the sensor is fixed on the outer wall of the GIS basin for measurement test.

In the measuring test process, various electromagnetic signals filled in a transformer substation interfere with measurement, in order to reduce signal interference, the prior art discloses a sensor with a metal shielding cover, the sensor is placed in the metal shielding cover with a cuboid structure, and the metal shielding cover can shield interference signals during the measuring test.

However, the prior art sensor has the following problems: firstly, the outer wall of the GIS basin is of an arc-shaped structure, the bottom of the sensor is of a plane structure, and a gap is reserved between the sensor and the sensor when the sensor bottom of the plane structure is fixed on the outer wall of the GIS basin of the arc-shaped structure; secondly, the metal shielding cover is made of rigid materials, and a gap is easy to be reserved between the metal shielding cover and the sensor shell; again, the metal shield can only cover the base and housing of the sensor, with the signal contacts of the sensor exposed outside the metal shield. In actual operation, interference signals are transmitted through the two gaps and the exposed signal connector and are mixed with partial discharge signals, so that a tester is difficult to identify the real partial discharge signals, misjudgment is easy to occur, and accuracy of a GIS partial discharge test is reduced. Therefore, there is a need to propose a sensor to solve the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a sensor which has the effect of reducing the transmission probability of interference signals.

To achieve the purpose, the invention adopts the following technical scheme:

a sensor for use in a GIS partial discharge measurement test, comprising:

the end face of the bottom of the base is a cambered surface which can be attached to the outer wall of the GIS basin;

the shell is fixed on the base and is provided with a signal connector;

The shielding cover is made of flexible materials and is wrapped outside the base, the shell and the signal connector, the shielding cover is provided with an opening and a closing-in, the edge of the opening is connected with the end face of the bottom of the base, and the edge of the closing-in is connected with the signal connector.

Optionally, still include the compression filling piece, open-ended edge is equipped with the turn-up, and the turn-up is towards the inboard of shield cover, and the compression filling piece sets up in the turn-up to along open-ended circumference closed loop setting, the bottom terminal surface of base is equipped with the draw-in groove, and the compression filling piece joint that sets up in the turn-up is in the draw-in groove, and the compression filling piece protrusion in the top of draw-in groove, and when cambered surface and GIS basin outer wall subsides, the compression filling piece can warp the gap between filling cambered surface and the GIS basin outer wall.

Optionally, the compression filler is secured within the bead.

Optionally, the compression filling is removably disposed within the bead.

Optionally, the signal connector further comprises a first fixing piece, wherein the first fixing piece is arranged at the edge of the closing-in, so that the edge of the closing-in is fixed on the signal connector.

Optionally, a second fixing member is further included, and the second fixing member is disposed outside the shielding case to fix the shielding case to the housing.

Optionally, the number of the second fixing members is plural, and at least two of the plurality of second fixing members are disposed perpendicular to each other.

Optionally, a ground wire is further included, and the ground wire is connected with the shielding cover.

Optionally, the shielding cover is a metal film or a metal cloth.

Optionally, the compression filling is a sponge or rubber.

The beneficial effects are that:

According to the sensor provided by the invention, the bottom end surface of the base is of the cambered surface structure, so that when the sensor base is fixed on the outer wall of the GIS basin, the bonding compactness of the sensor base and the outer wall of the GIS basin can be effectively improved, and the probability of transmitting interference signals between the sensor base and the outer wall of the GIS basin is reduced; the base, the shell and the signal connector of the sensor are all wrapped in the shielding cover, so that interference signals can be prevented from being transmitted through the signal connector; the shielding cover adopts flexible material, when wrapping up base, casing and signal connection, can adjust according to the shape and the size of base, casing and signal connection for the shielding cover is laminated compacter with base, casing and signal connection, has reduced the probability that interference signal passes through the clearance between shielding cover and base, casing or the signal connection and transmits. Therefore, the sensor provided by the invention can effectively reduce the interference signal transmission probability and has the effect of improving the accuracy of GIS partial discharge test.

Drawings

FIG. 1 is a schematic view of a sensor according to a first embodiment without a shielding cover;

FIG. 2 is a schematic diagram of a sensor according to a first embodiment;

FIG. 3 is a schematic view of the bottom structure of a sensor according to the first embodiment;

FIG. 4 is a partial cross-sectional view of a base, bead, and compression filling provided in accordance with one embodiment;

FIG. 5 is a partial cross-sectional view of a base, bead, and compression filling provided in accordance with the second embodiment;

Fig. 6 is a partial cross-sectional view of a base, bead, and compression filling provided in accordance with a second embodiment.

In the figure:

100. A base; 200. a housing; 210. a signal connector; 300. a shield; 310. an opening; 311. hemming; 320. closing in; 400. compressing the filler; 510. a first fixing member; 520. a second fixing member; 600. a ground wire; 700. sticking buckles; 800. partial discharge signal transmission channels.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Example 1

The embodiment provides a sensor, which is used for GIS partial discharge measurement test, can effectively reduce the interference signal transmission probability, and has the effect of improving the accuracy of GIS partial discharge test.

Specifically, as shown in fig. 1 to 3, the sensor provided in this embodiment includes a base 100, a housing 200 and a shielding case 300, the housing 200 is fixed on the base 100, the housing 200 is provided with a signal connector 210, the housing 200 is provided with a first through hole, the base 100 is provided with a second through hole, and the first through hole, the second through hole and the signal connector 210 are communicated, thereby forming a partial discharge signal transmission channel 800. The bottom terminal surface of base 100 is the cambered surface, and the cambered surface can be laminated with GIS basin outer wall, and shield cover 300 is flexible material to the parcel is outside base 100, casing 200 and signal connection 210, and shield cover 300 is equipped with opening 310 and binding off 320, and opening 310's edge is connected with base 100's bottom terminal surface, and binding off 320's edge is connected with signal connection 210. It can be appreciated that the edge of the opening 310 is disposed at the edge of the bottom end surface of the base 100, and is kept away from the second communication hole.

According to the sensor, the bottom end face of the base 100 is of the cambered surface structure, when the sensor base 100 is fixed on the outer wall of the GIS basin, the bonding compactness of the sensor base 100 and the outer wall of the GIS basin can be effectively improved, and the probability that interference signals are transmitted between the sensor base 100 and the outer wall of the GIS basin is reduced; the base 100, the shell 200 and the signal connector 210 of the sensor are all wrapped in the shielding cover 300, so that interference signals can be prevented from being transmitted through the signal connector 210; when the shielding cover 300 is made of flexible materials and wraps the base 100, the shell 200 and the signal connector 210, the shape and the size of the base 100, the shell 200 and the signal connector 210 can be adjusted, so that the shielding cover 300 is tightly attached to the base 100, the shell 200 and the signal connector 210, and the probability of transmitting interference signals through gaps between the shielding cover 300 and the base 100, the shell 200 or the signal connector 210 is reduced. Therefore, the sensor provided by the invention can effectively reduce the interference signal transmission probability and has the effect of improving the accuracy of GIS partial discharge test.

Optionally, the shielding case 300 is a metal film or a metal cloth, and can be adjusted according to the shape and the size of the base 100, the housing 200, and the signal connector 210, and has a signal shielding effect. Specifically, the metal film is common in the prior art, and the metal film formed on the surface of the film substrate by evaporating copper, zinc, chromium or aluminum and other metal materials under the vacuum condition is the prior art, and the manufacturing process and the finished product are not repeated here. The metal cloth is also a common electromagnetic shielding cloth in the prior art, and the manufacturing process and the finished product of the metal cloth are all in the prior art, and are not repeated here.

Optionally, as shown in fig. 1 to 3, the sensor provided in this embodiment further includes a first fixing member 510, where the first fixing member 510 is disposed at an edge of the closing-in 320, so as to fix the edge of the closing-in 320 on the signal connector 210, and tighten the closing-in 320 on the signal connector 210, so as to avoid a larger gap between a portion of the closing-in 320 and the signal connector 210. Specifically, the first fixing member 510 may be a binding member made of an elastic insulating material, such as a rubber band, or a metal hoop.

Optionally, as shown in fig. 1 to 3, the sensor provided in this embodiment further includes a second fixing member 520, where the second fixing member 520 is disposed outside the shielding case 300 to fix the shielding case 300 on the housing 200, so as to prevent the shielding case 300 from sliding off the housing 200. Specifically, the second fixing member 520 may be a binding member made of an elastic insulating material, such as a rubber band, or a binding string.

Further, the number of the second fixing members 520 is plural, at least two of the second fixing members 520 are perpendicular to each other, and fix the shielding case 300 in different directions, so as to improve the reliability of the shielding case 300 wrapping the housing 200. In the technical solution provided in this embodiment, with continued reference to fig. 1 to 3, two second fixing members 520 are disposed in the length direction (the left-right direction in fig. 2) of the housing 200, one second fixing member 520 is disposed in the height direction (the up-down direction in fig. 2) of the housing 200, so that not only are the shielding case 300 fixed in two mutually perpendicular directions, but also the reliability of the shielding case 300 wrapped outside the housing 200 is further improved by disposing two second fixing members 520 in the longer direction of the housing 200.

Optionally, with continued reference to fig. 1 to 3, the sensor provided in this embodiment further includes a ground wire 600, one end of the ground wire 600 is connected to the shielding case 300, and the other end is grounded, so that charges on the shielding case 300 are led into the ground, thereby avoiding electric shock of a tester and improving safety of the sensor.

Optionally, as shown in fig. 4, the sensor provided in this embodiment further includes a compression filling member 400, the edge of the opening 310 is provided with a curled edge 311, the curled edge 311 faces the inner side of the shielding case 300, the compression filling member 400 is disposed in the curled edge 311 and is disposed along the circumferential closed loop of the opening 310, a clamping groove is disposed on the bottom end surface of the base 100, the compression filling member 400 disposed in the curled edge 311 is clamped in the clamping groove, the compression filling member 400 protrudes out of the top of the clamping groove, and when the cambered surface is attached to the GIS basin outer wall, the compression filling member 400 can deform to fill a gap between the cambered surface and the GIS basin outer wall. Realize from this that open-ended 310's edge is connected with the bottom terminal surface of base 100, on the other hand, pack the compression filler 400 that will set up in turn-ups 311 in the draw-in groove, when fixing sensor base 100 on the GIS basin outer wall, through pressing the sensor, compression filler 400 is compressed and then produces the deformation, and then can fill the gap between sensor base 100 and the GIS basin outer wall, further improve the compactness of sensor base 100 and the laminating of GIS basin outer wall, improve GIS partial discharge test's accuracy. In yet another aspect, the compression filling member 400 is disposed in the curled edge 311 of the shielding can 300, so that the compression filling member 400 also has the effect of shielding the interference signal, and further reduces the probability of transmitting the interference signal between the sensor base 100 and the GIS basin outer wall.

Further, the compression filling member 400 is made of sponge or rubber, so as to achieve the effect of compression deformation of the compression filling member 400.

Preferably, the bead 311 is a closed bead to reduce the gap at the bead 311, ensuring that the bead 311 is wrapped around the cross-section of the compression filling 400.

Optionally, with continued reference to fig. 4, the compression filling member 400 is fixed in the bead 311, specifically, the compression filling member 400 may be fixed in the bead 311 by gluing or stitching, and the manner of fixing the compression filling member 400 in the bead 311 may reduce the gap between the compression filling member 400 and the bead 311 as much as possible, thereby reducing the interference signal transmission probability.

The sensor provided in this embodiment uses the faraday cage principle to wrap the base 100, the housing 200 and the signal connector 210 of the sensor in the shielding case 300, and connects the grounding wire 600 to the shielding case 300, so as to play a role in shielding interference signals. In addition, the bottom end surface of the sensor is arranged to be of an arc surface structure, so that the sensor can be tightly attached to the outer wall of the GIS basin; the compression filling piece 400 wrapping the shielding cover 300 is arranged on the end face of the bottom of the sensor, the sensor is pressed towards the GIS basin during measurement test, the compression filling piece 400 deforms, the gap between the sensor base 100 and the outer wall of the GIS basin is further reduced, the transmission probability of interference signals is reduced to the greatest extent, and the GIS partial discharge test accuracy is improved.

Example two

The present embodiment provides a sensor, which is different from the sensor provided in the first embodiment in that:

the compression filling member 400 is detachably disposed in the curled edge 311, so that the compression filling member 400 is convenient to replace, and when the compression filling member 400 is compressed and deformed for a long time, deformation failure or aging occurs, so that the compression filling member 400 can be replaced. Specifically, the compression filling member 400 may be detachably connected with the curled edge 311 through structures such as the sticking buckle 700 or the snap fastener, and in the technical scheme provided in this embodiment, as shown in fig. 5, the compression filling member 400 is detachably connected with the curled edge 311 through the sticking buckle 700, so that not only can the quick assembly and disassembly of the compression filling member 400 be realized, but also the gap between the compression filling member 400 and the curled edge 311 can be reduced as much as possible.

Optionally, as shown in fig. 6, the edges of the bead 311 press against the inner wall of the shield can 300 to reduce the gap at the bead 311.

The rest of the structure of the sensor provided in this embodiment is the same as that of the first embodiment, and will not be described again.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. A sensor for use in a GIS partial discharge measurement test, comprising:

The base (100), the bottom end face of the base (100) is a cambered surface, and the cambered surface can be attached to the outer wall of the GIS basin;

The shell (200) is fixed on the base (100), and a signal connector (210) is arranged on the shell (200);

the shielding cover (300) is made of flexible materials and is wrapped outside the base (100), the shell (200) and the signal connector (210), the shielding cover (300) is provided with an opening (310) and a closing-in (320), the edge of the opening (310) is connected with the bottom end face of the base (100), and the edge of the closing-in (320) is connected with the signal connector (210);

The edge of the opening (310) is provided with a curled edge (311), the curled edge (311) faces the inner side of the shielding cover (300), the compressed filling element (400) is arranged in the curled edge (311) and is arranged along the circumferential closed loop of the opening (310), the bottom end surface of the base (100) is provided with a clamping groove, the compressed filling element (400) arranged in the curled edge (311) is clamped in the clamping groove, the compressed filling element (400) protrudes out of the top of the clamping groove, and when the cambered surface is attached to the outer wall of the GIS basin, the compressed filling element (400) can deform and fill a gap between the cambered surface and the outer wall of the GIS basin, and the curled edge (311) is a closed opening;

The second fixing pieces (520), the second fixing pieces (520) are arranged on the outer side of the shielding cover (300) so as to fix the shielding cover (300) on the shell (200), two second fixing pieces (520) are arranged in the length direction of the shell (200), one second fixing piece (520) is arranged in the height direction of the shell (200), and the edge of the curled edge (311) is pressed on the inner wall of the shielding cover (300).

2. The sensor according to claim 1, characterized in that the compression filling (400) is fixed within the bead (311).

3. The sensor according to claim 1, characterized in that the compression filling (400) is detachably arranged in the bead (311).

4. A sensor according to any one of claims 1-3, further comprising a first securing member (510), the first securing member (510) being disposed at an edge of the cuff (320) to secure the edge of the cuff (320) to the signal connector (210).

5. The sensor according to claim 1, wherein the number of the second fixing members (520) is plural, and at least two of the plurality of the second fixing members (520) are disposed perpendicular to each other.

6. A sensor according to any of claims 1-3, further comprising a ground wire (600), said ground wire (600) being connected to said shield (300).

7. A sensor according to any one of claims 1-3, characterized in that the shielding (300) is a metal film or a metal cloth.

8. A sensor according to any one of claims 1-3, characterized in that the compression filling (400) is a sponge or rubber.