CN113253077B - Sound-vibration composite MEMS sensor for detecting partial discharge of cable - Google Patents
Sound-vibration composite MEMS sensor for detecting partial discharge of cable Download PDFInfo
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- CN113253077B CN113253077B CN202110734807.8A CN202110734807A CN113253077B CN 113253077 B CN113253077 B CN 113253077B CN 202110734807 A CN202110734807 A CN 202110734807A CN 113253077 B CN113253077 B CN 113253077B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
Abstract
The invention discloses a sound and vibration composite MEMS sensor for detecting partial discharge of a cable, which comprises a sensing component and an annular hoop, wherein the annular hoop is used for fixing the sensor and consists of two semicircular clamping rings, and one end of each semicircular clamping ring, which is far away from the sensor, is provided with a connecting block; the clamping device comprises a clamping assembly and a clamping assembly, wherein the clamping assembly comprises a clamping frame, the clamping frame comprises a cross rod and connecting rods, the two parallel cross rods and the two parallel connecting rods form a rectangular clamping frame, the cross rod is provided with a long groove, a fastening piece is arranged in the long groove, a fastening groove is formed between the fastening piece and one of the connecting rods, and connecting blocks of the two semicircular clamping rings are embedded into the fastening groove; through the fixing of using annular clamp to the sensor, can guarantee that the sensor makes the probe laminating of sensor at cable joint's surface.
Description
Technical Field
The invention relates to the field of sensors, in particular to a sound and vibration composite MEMS sensor for detecting partial discharge of a cable.
Background
With the continuous development of power grids, the application of power cables is more and more extensive, and the cable detection technology becomes an important subject of the power industry increasingly. The electric field stress of the power cable intermediate head is concentrated, and the electric field stress is a weak link for power cable insulation, so that the cable breakdown is easily caused by the deterioration of the cable insulation performance, and the partial discharge problem is generated. The partial discharge problem of the high-voltage cable joint is a main factor causing high-voltage cable accidents, and the detection and early warning work of the high-voltage cable joint is well done, which is the primary work for ensuring the normal operation of the high-voltage cable. In the prior art, the sensor installed at the cable joint is usually wound and fixed by an adhesive tape, so that the installation mode is fixed without labor and the acquired data has larger deviation.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and in this section as well as in the abstract and the title of the invention of this application some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above problems occurring in the prior art and/or the problems occurring in the prior art.
Therefore, the technical problem to be solved by the invention is that the sensor installed on the cable joint is usually wound and fixed by using an adhesive tape in the prior art, the installation mode is not difficult to fix, and the acquired data has large deviation.
In order to solve the technical problems, the invention provides the following technical scheme: a sound and vibration composite MEMS sensor for detecting partial discharge of a cable comprises a sensing assembly, a sensor and an annular hoop for fixing the sensor, wherein the annular hoop consists of two semicircular clamping rings, and one end of each semicircular clamping ring, which is far away from the sensor, is provided with a connecting block;
the fastening assembly comprises a fastening frame, the fastening frame comprises a cross rod and connecting rods, the two parallel cross rods and the two parallel connecting rods form a rectangular fastening frame, the cross rod is provided with an elongated slot, a fastening piece is arranged in the elongated slot, a fastening groove M is formed between the fastening piece and one of the connecting rods, and connecting blocks of the two semicircular clamping rings are embedded into the fastening groove M.
As a preferable scheme of the acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to the present invention, wherein: two ratchet bars are arranged in the long groove along the length direction, the fastener comprises a pressure rod positioned in the fastening frame and a positioning block positioned in the long groove, the positioning block is provided with a positioning groove, a positioning piece is arranged in the positioning groove, and one end of the positioning piece extends out of the positioning groove and is in contact with the ratchet bars.
As a preferable scheme of the acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to the present invention, wherein: the locating piece is provided with the edge the adjustment tank that fastener length direction extends, the adjustment tank with the constant head tank passes through mutually, the setting element is including being located the location arch of constant head tank and being located the stopper of adjustment tank.
As a preferable scheme of the acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to the present invention, wherein: the limiting block is provided with a trapezoidal groove, the cross section of the trapezoidal groove is in the shape of a right trapezoid, the trapezoidal groove is divided into an avoiding groove close to the positioning protrusion and a triangular groove far away from the positioning protrusion, and one side surface of the triangular groove far away from the positioning protrusion is an inclined surface; the adjusting groove is internally provided with a sliding block, the sliding block is provided with a wedge block, the profile of the wedge block is consistent with that of the triangular groove, and the inclined plane of the wedge block is parallel to that of the triangular groove.
As a preferable scheme of the acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to the present invention, wherein: the positioning blocks are of symmetrical structures, two limiting blocks are arranged in the positioning blocks, and a first spring is arranged between the two limiting blocks.
As a preferable scheme of the acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to the present invention, wherein: the adjusting groove opening part is provided with the spacing collar, the slider is kept away from the one end of wedge is provided with presses the post, it passes to press the post the spacing collar, the wedge with be provided with the second spring between the adjusting groove bottom.
As a preferable scheme of the acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to the present invention, wherein: the pressing column is provided with a fixing groove along the radial direction, two fixing pins are symmetrically distributed in the fixing groove, and a third spring is arranged between the two fixing pins.
As a preferable scheme of the acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to the present invention, wherein: the pressing column is provided with a rotating groove which penetrates through the fixing groove, and a rotating end cover is arranged in the rotating groove.
As a preferable scheme of the acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to the present invention, wherein: the part that the fixed pin is located rotatory inslot is provided with the edge rotatory inslot axial extension's bolt, rotatory end cover is provided with the inclined groove, the bolt embedding in the inclined groove, the length direction of inclined groove not with rotatory end cover's radial coincidence.
As a preferable scheme of the acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to the present invention, wherein: the annular hoop is provided with a mounting hole, and the sensor is fixedly mounted in the mounting hole.
The invention has the beneficial effects that: through using annular clamp to the fixed of sensor, can guarantee that the sensor makes the probe laminating of sensor on cable joint's surface, better detection cable joint's abnormal conditions, and the installation is simple firm, dismantle also more convenient.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic structural diagram of an annular clamp in an acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram illustrating a fastening component of an acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a fastening assembly in an acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to an embodiment of the present invention;
FIG. 4 is a partial enlarged structural view of a fastening assembly in an acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a limiting block in an acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a slider in an acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration when describing the embodiments of the present invention, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Examples
Referring to fig. 1 to 6, the embodiment provides an acoustic-vibration composite MEMS sensor for detecting partial discharge of a cable, including a sensing assembly 100, which includes a sensor 101 and an annular clamp 102 for fixing the sensor 101, where the annular clamp 102 is composed of two semicircular clamping rings 102a, and a connecting block 102b is disposed at one end of the semicircular clamping ring 102a away from the sensor 101; the sensor 101 is a sound and vibration composite MEMS sensor and is used for monitoring a cable joint, and the semicircular clamping ring 102a is used for fixedly mounting the sensor 101 on the cable joint; the fastening assembly 200 comprises a fastening frame 201, and the fastening frame 201 is used for fixedly connecting the end parts of the two semicircular snap rings 102 a.
Specifically, the fastening frame 201 comprises a cross bar 201a and connecting rods 201b, the two parallel cross bars 201a and the two parallel connecting rods 201b form a rectangular fastening frame 201, wherein the cross bar 201a is provided with a long groove 201c, a fastening piece 202 is arranged in the long groove 201c, the fastening piece 202 is in a long strip shape, a fastening groove M is formed between the fastening piece 202 and one of the connecting rods 201b, the connecting blocks 102b of the two semicircular snap rings 102a are embedded in the fastening groove M, and the fastening piece 202 connects the two connecting blocks 102b in a fitting manner through one of the connecting rods 201 b.
Furthermore, two ratchet bars 201d are arranged in the long groove 201c along the length direction, the ratchet bars 201d have a plurality of ratchet teeth which are uniformly distributed, the fastening member 202 comprises a pressing rod 202a positioned in the fastening frame 201 and a positioning block 202b positioned in the long groove 201c, the positioning block 202b is provided with a positioning groove 202c, a positioning piece 203 is arranged in the positioning groove 202c, one end of the positioning piece 203 extends out of the positioning groove 202c and is in contact with the ratchet bars 201d, when one end of the positioning piece 203 is embedded into the tooth grooves of the ratchet bars 201d, the positioning piece 203 can only move in one direction due to the distance of the ratchet teeth, namely, the direction of pressing the connecting block 102 b.
Still further, the positioning block 202b is provided with an adjusting groove 202d extending along the length direction of the fastening member 202, the adjusting groove 202d is intersected with the positioning groove 202c, and the positioning member 203 comprises a positioning protrusion 203a located in the positioning groove 202c and a limiting block 203b located in the adjusting groove 202 d. The contour of the stop block 203b is larger than that of the positioning groove 202 c.
The limiting block 203b is provided with a trapezoidal groove 203c, the cross section of the trapezoidal groove 203c is in the shape of a right trapezoid, the trapezoidal groove 203c is divided into an avoidance groove 203d close to the positioning protrusion 203a and a triangular groove 203e far away from the positioning protrusion 203a, and one side surface of the triangular groove 203e far away from the positioning protrusion 203a is an inclined surface; a slide block 204 is arranged in the adjusting groove 202d, a wedge block 204a is arranged on the slide block 204, the profile of the wedge block 204a is consistent with that of the triangular groove 203e, and the inclined surface of the wedge block 204a is parallel to that of the triangular groove 203 e. Therefore, when the sliding block 204 moves in the adjusting groove 202d, the wedge block 204a contacts the surface of the triangular groove 203e, so that the positioning protrusion 203a is disengaged from the tooth slot of the ratchet bar 201d and is retracted into the positioning groove 202 c. When the positioning protrusion 203a is compressed by the ratchet bar 201d, the movement of the slider 204 is not affected because the wedge 204a can be received by the avoiding groove 203 d.
Preferably, the positioning blocks 202b are of a symmetrical structure, two limiting blocks 203b are arranged in the positioning blocks 202b, and the first spring 205 is arranged between the two limiting blocks 203 b.
Further, a limiting ring 206 is arranged at an opening of the adjusting groove 202d, the inner diameter of the limiting ring 206 is smaller than that of the adjusting groove 202d, and the profile of the sliding block 204 is larger than the inner profile of the limiting ring 206; one end of the sliding block 204 far away from the wedge block 204a is provided with a pressing column 207, the pressing column 207 penetrates through the limiting ring 206, and a second spring 204b is arranged between the wedge block 204a and the bottom of the adjusting groove 202d, so that the sliding block 204 and the pressing column 207 are far away from the positioning protrusion 203a due to the elastic force of the second spring 204 b. When the pressing column 207 is pushed to press the second spring 204b, the positioning protrusion 203a is disengaged from the teeth of the ratchet bar 201d and is retracted into the positioning groove 202 c.
Preferably, the pressing column 207 is provided with a fixing groove 207a along the radial direction, two fixing pins 208 are symmetrically distributed in the fixing groove 207a, and a third spring 209 is arranged between the two fixing pins 208. When the pressing column 207 is pushed into the adjusting groove 202d, the fixing pin 208 extends out and abuts against the adjusting groove 202d and the limiting ring 206 to limit the resetting of the pressing column 207, so that the positioning protrusion 203a is in a state of being separated from the tooth socket of the ratchet bar 201d, and the sliding is facilitated.
Preferably, the pressing column 207 is provided with a rotation groove 207b penetrating the fixing groove 207a, and a rotation cap 210 is provided in the rotation groove 207 b. The rotary cover 210 is rotatable, a latch 208a extending in the axial direction of the rotary groove 207b is provided at a portion of the fixing pin 208 located in the rotary groove 207b, the rotary cover 210 is provided with an inclined groove 210a, the latch 208a is fitted into the inclined groove 210a, and the length direction of the inclined groove 210a does not overlap with the radial direction of the rotary cover 210. Thus, when the rotating cover 210 is rotated, the inclined slot 210a drives the latch 208a to move along the radial direction of the rotating cover 210.
It should be noted that the annular collar 102 is provided with a mounting hole 102c, and the sensor 101 is fixedly mounted in the mounting hole 102c, where the fixing manner is the prior art and is not described again.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (8)
1. The utility model provides a compound MEMS sensor of sound vibration for detecting cable partial discharge which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the sensing assembly (100) comprises a sensor (101) and an annular hoop (102) for fixing the sensor (101), wherein the annular hoop (102) consists of two semicircular clamping rings (102 a), and one end, far away from the sensor (101), of each semicircular clamping ring (102 a) is provided with a connecting block (102 b);
the fastening assembly (200) comprises a fastening frame (201), wherein the fastening frame (201) consists of a cross rod (201 a) and connecting rods (201 b), the two parallel cross rods (201 a) and the two parallel connecting rods (201 b) form a rectangular fastening frame (201), the cross rod (201 a) is provided with a long groove (201 c), a fastening piece (202) is arranged in the long groove (201 c), a fastening groove (M) is formed between the fastening piece (202) and one of the connecting rods (201 b), and connecting blocks (102 b) of the two semicircular snap rings (102 a) are embedded into the fastening groove (M);
two ratchet racks (201 d) are arranged in the long groove (201 c) along the length direction, the fastener (202) comprises a pressure lever (202 a) positioned in the fastening frame (201) and a positioning block (202 b) positioned in the long groove (201 c), the positioning block (202 b) is provided with a positioning groove (202 c), a positioning piece (203) is arranged in the positioning groove (202 c), and one end of the positioning piece (203) extends out of the positioning groove (202 c) and is in contact with the ratchet racks (201 d);
the positioning block (202 b) is provided with an adjusting groove (202 d) extending along the length direction of the fastener (202), the adjusting groove (202 d) is communicated with the positioning groove (202 c), and the positioning piece (203) comprises a positioning protrusion (203 a) located in the positioning groove (202 c) and a limiting block (203 b) located in the adjusting groove (202 d).
2. The acoustic-vibration composite MEMS sensor for detecting partial discharge of cable according to claim 1, wherein: the limiting block (203 b) is provided with a trapezoidal groove (203 c), the cross section of the trapezoidal groove (203 c) is in a shape of a right trapezoid, the trapezoidal groove (203 c) is divided into an avoiding groove (203 d) close to the positioning protrusion (203 a) and a triangular groove (203 e) far away from the positioning protrusion (203 a), and one side surface of the triangular groove (203 e) far away from the positioning protrusion (203 a) is an inclined surface; a sliding block (204) is arranged in the adjusting groove (202 d), a wedge block (204 a) is arranged on the sliding block (204), the profile of the wedge block (204 a) is consistent with that of the triangular groove (203 e), and the inclined surface of the wedge block (204 a) is parallel to that of the triangular groove (203 e).
3. The acoustic-vibration composite MEMS sensor for detecting partial discharge of cable according to claim 2, wherein: the positioning blocks (202 b) are of a symmetrical structure, two limiting blocks (203 b) are arranged in each positioning block (202 b), and a first spring (205) is arranged between the two limiting blocks (203 b).
4. The acoustic-vibration composite MEMS sensor for detecting partial discharge of cable according to claim 3, wherein: the opening of the adjusting groove (202 d) is provided with a limiting ring (206), one end, far away from the wedge block (204 a), of the sliding block (204) is provided with a pressing column (207), the pressing column (207) penetrates through the limiting ring (206), and a second spring (204 b) is arranged between the wedge block (204 a) and the bottom of the adjusting groove (202 d).
5. The acoustic-vibration composite MEMS sensor for detecting partial discharge of cable according to claim 4, wherein: the pressing column (207) is provided with a fixing groove (207 a) along the radial direction, two fixing pins (208) which are symmetrically distributed are arranged in the fixing groove (207 a), and a third spring (209) is arranged between the two fixing pins (208).
6. The acoustic-vibration composite MEMS sensor for detecting partial discharge of cable according to claim 5, wherein: the pressing column (207) is provided with a rotating groove (207 b) which penetrates through the fixing groove (207 a), and a rotating end cover (210) is arranged in the rotating groove (207 b).
7. The acoustic-vibration composite MEMS sensor for detecting partial discharge of cable according to claim 6, wherein: the part of the fixing pin (208) located in the rotating groove (207 b) is provided with a bolt (208 a) extending along the axial direction of the rotating groove (207 b), the rotating end cover (210) is provided with an inclined groove (210 a), the bolt (208 a) is embedded in the inclined groove (210 a), and the length direction of the inclined groove (210 a) is not overlapped with the radial direction of the rotating end cover (210).
8. The acoustic-vibration composite MEMS sensor for detecting partial discharge of cable according to claim 7, wherein: the annular clamp (102) is provided with a mounting hole (102 c), and the sensor (101) is fixedly mounted in the mounting hole (102 c).
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| CN202110734807.8A CN113253077B (en) | 2021-06-30 | 2021-06-30 | Sound-vibration composite MEMS sensor for detecting partial discharge of cable |
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| CN202110734807.8A CN113253077B (en) | 2021-06-30 | 2021-06-30 | Sound-vibration composite MEMS sensor for detecting partial discharge of cable |
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| CN211577202U (en) * | 2019-11-05 | 2020-09-25 | 广东电网有限责任公司 | Fixing device, sensor and basin-type insulator |
| CN211263668U (en) * | 2019-11-22 | 2020-08-14 | 国网江苏省电力有限公司泰州供电分公司 | Power transmission line ground connection detection and fault location structure |
| CN211502249U (en) * | 2019-11-28 | 2020-09-15 | 洛阳涧光特种装备股份有限公司 | Vibration sensor mounting rack for coke drum feeding pipeline |
| CN213363837U (en) * | 2020-09-14 | 2021-06-04 | 中国海洋大学 | Optical fiber sensor fixing device for deep-sea mixed transportation vertical pipe |
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