CN209841994U - Positioning device for detecting power cable fault and laying route under sea surface - Google Patents
Positioning device for detecting power cable fault and laying route under sea surface Download PDFInfo
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- CN209841994U CN209841994U CN201920441888.0U CN201920441888U CN209841994U CN 209841994 U CN209841994 U CN 209841994U CN 201920441888 U CN201920441888 U CN 201920441888U CN 209841994 U CN209841994 U CN 209841994U
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- Locating Faults (AREA)
Abstract
The utility model discloses a positioner that is used for surveying power cable trouble under sea and lays route, include the sonar sensor and set firmly the hydrofoil under the sonar sensor, the sonar sensor includes casing, lid, cyclic annular quality body and piezoelectric wafer, the upper end of casing has the opening, the opening extends vacuole formation in to the casing, lid sealing connection is on the opening, and this lid is provided with the connecting piece that is used for meeting with the rope and the signal output socket who pegs graft with signal cable, in the cyclic annular quality body is fixed in the cavity, the upper surface of cyclic annular quality body is located to piezoelectric wafer, this piezoelectric wafer still with signal output socket electric connection. The utility model provides a positioner once tests on the sea and can survey the fault point and the route of location cable, practices thrift manpower and material resources greatly, has produced huge social and economic benefits.
Description
Technical Field
The utility model relates to a transmission cable fault detection instrument field under the sea, concretely relates to a positioner that is used for surveying power cable trouble and lays route under the sea.
Background
The transmission cable is an important element for transmitting and distributing electric energy of a power system, once the cable breaks down, power failure loss can be caused to enterprise production, inconvenience is brought to life of residents, and therefore the fault needs to be found and repaired as soon as possible after the cable breaks down. At present, the detection and positioning method and equipment for the faults of the power transmission cables buried under the ground are very advanced in China, but the accurate insulation fault positioning method of the submarine power transmission cables is relatively lagged behind, and the original, inefficient and time-consuming method for observing the resistance value change and positioning of the megohmmeter in a fault area by using a maintenance ship to salvage the cables section by section is still basically adopted.
The invention provides a submarine cable fault point accurate positioning method (application number is 201210248194.8). the method adopts BOTDR or BOTDA to realize real-time online monitoring of submarine cables, utilizes strain/temperature information carried by Brillouin scattering signals to perform combined analysis with submarine topography, geological structures and construction details, extracts characteristic points, establishes a database and greatly improves positioning accuracy. After the database is established, once a cable fault occurs, the complex data query and calculation work can be saved, and the fault position can be quickly and accurately positioned, so that the submarine cable can be repaired.
The invention provides a method (application number is 201310408093.7) for omnibearing monitoring and accurate positioning of a fault point of a submarine photoelectric composite cable, which adopts a Brillouin distributed strain/temperature test technology to realize real-time operation on-line monitoring of the submarine photoelectric composite cable, acquires real-time operation state information of the submarine photoelectric composite cable by analyzing Brillouin distributed optical fiber strain/temperature test data, fuses with the actual submarine cable state information, and extracts submarine photoelectric composite cable routing characteristic information, thereby realizing detection and accurate positioning of the fault point of the submarine cable. When the submarine photoelectric composite cable has a fault, the megameter is adopted to detect the property of the cable fault, the type of the cable fault is judged, and a time domain reflection method is adopted to monitor the fault and locate the cable fault point in the photoelectric composite cable. And combining the optical fiber fault point obtained by the Brillouin optical time domain reflection method test and the cable fault point position obtained by the time domain reflection method to accurately obtain the geographical position information of the fault point of the submarine photoelectric composite cable.
The two patents are only suitable for detecting the route and the fault point of the optical cable or the composite optical cable laid under the sea, and are not suitable for the insulation fault of the power transmission cable, so that a method for accurately positioning the insulation fault of the submarine cable, which is simpler, more convenient and more efficient, is urgently needed to replace a megaohm apparent measurement method in the prior art.
Disclosure of Invention
The utility model provides a positioner that is used for surveying power cable trouble under sea and lays the route utilizes well-known technique, and the sound wave that is about to aquatic cable fault point production converts the signal of telecommunication into through sonar sensor's piezoelectric effect and provides various signal processing circuit and terminal equipment to confirm direction, range, distance and the cable route of sound source, realize accomplishing submarine power transmission cable's insulation fault and submarine power transmission cable route's quick location on the sea.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a positioning device for detecting power cable faults and laying routes under the sea surface, comprising a sonar sensor with a waterproof function and a hydrofoil fixedly arranged right below the sonar sensor, the sonar sensor comprising: the upper end of the shell is provided with an opening, and the opening extends into the shell to form a cavity; the cover body is connected to the opening in a sealing mode and is provided with a connecting piece used for being connected with a rope and a signal output socket connected with a signal cable in an inserting mode; the piezoelectric wafer is arranged in the cavity through a supporting component and is electrically connected with the signal output socket; and the annular mass body is fixed on the edge of the lower surface of the piezoelectric wafer.
When the insulation fault of the transmission cable is fixed, two positioning devices connected with a data processor on a test ship can be arranged in a fault water area at intervals, the two positioning devices respectively convert vibration sound waves transmitted from a fault point of the cable under seawater into electric signals and transmit the electric signals to the data processor, and the data processor judges the accurate position of the fault point and the path direction and position of the cable on a seabed through the time difference of the sound waves received by the two positioning devices, digital signal processing and logic judgment.
The utility model provides a positioner need not salvage the trouble cable, once tests on the sea and can survey location cable fault point and route rapidly, with the technique that needs a fault test of can accomplishing many days among the prior art, becomes the detection that once the test of going out to the sea just can accomplish fault location and route, practices thrift manpower and material resources greatly, has produced huge social and economic benefits.
In order to better achieve the above object, preferably, the piezoelectric wafer includes a brass substrate in a wafer shape and a piezoelectric ceramic plate attached to an upper surface of the brass substrate, and the brass substrate and the piezoelectric ceramic plate are respectively connected to two core wire terminals of the signal output socket through a wire.
Preferably, the outer diameter of the annular mass is the same as the outer diameter of the brass substrate.
Preferably, the support assembly includes a support member and a fixing member, the lower end of the support member is vertically embedded into the bottom surface of the housing, the center of the piezoelectric wafer has a mounting hole coaxial with the central hole of the annular mass body, the upper end of the fixing member is located on the upper surface of the piezoelectric wafer, and the lower end of the fixing member is vertically embedded into the upper end surface of the support member after passing through the mounting hole of the piezoelectric wafer and the central hole of the annular mass body.
Preferably, the fixing piece is a screw, and an insulating gasket is clamped between the screw and the piezoelectric wafer.
Preferably, the hydrofoil comprises a fixed disk and two fins, and the two fins are mutually orthogonal and vertically fixed on the lower surface of the fixed disk.
Preferably, the fin is detachably connected with the fixed disk through four stainless steel angle steels arranged at the end parts of the fin.
Preferably, an internal threaded column is fixedly arranged at the center of the upper surface of the fixed disc, and an external threaded column screwed with the internal threaded column is fixedly arranged on the lower surface of the outer wall of the shell.
Preferably, the housing and the cover are both made of stainless steel material.
The utility model has the advantages that:
the utility model discloses utilize among the prior art piezoelectric effect of piezoelectric wafer to accomplish signal reception, and the voltage signal size that piezoelectric wafer produced is proportional relation with the vibrations dynamics that receives, the utility model discloses a set up cyclic annular quality body at piezoelectric wafer lower surface, can improve piezoelectric wafer's sound-electricity conversion efficiency, set up the area of receipt of the multiplicable vibrations sound wave of hydrofoil in the casing below to sonar sensing probe's sensitivity of reception has been improved, longer detection distance and wider detection range are obtained.
Drawings
Fig. 1 is a schematic structural diagram of a positioning device for detecting a power cable fault and routing under the sea surface according to an embodiment of the present invention;
fig. 2 is a structural sectional view of the sonar transducer of fig. 1;
FIG. 3 is a schematic view of the hydrofoil of FIG. 1;
in the figure:
10-sonar sensor, 11-shell, 111-cavity, 12-cover, 121-connecting piece, 122-signal output socket, 123-signal cable, 13-annular mass body, 141-supporting piece, 142-fixing piece, 151-brass substrate, 152-piezoelectric ceramic piece and 16-insulating spacer; 17. a seal ring; 18. an externally threaded post;
20-hydrofoil, 21-fixed disk, 22-fin, 23-stainless steel angle steel and 24-internal thread column.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1 to 3, the present embodiment provides a positioning apparatus for detecting a power cable fault and a routing under the sea surface, including a sonar transducer 10 having a waterproof function and a hydrofoil 20 fixedly installed right below the sonar transducer 10.
As shown in fig. 1 and 2, the sonar sensor 10 includes a housing 11, a cover 12, a signal output socket 122, an annular mass body 13, and a piezoelectric wafer, where an opening is formed at an upper end of the housing 11, the opening extends into the housing 11 to form a cavity 111, the cover 12 is hermetically connected to the opening, the cover 12 is provided with a connector 121 for connecting to a rope and the signal output socket 122 for plugging to a signal cable 123, the piezoelectric wafer is disposed in the cavity 111 through a support assembly, the piezoelectric wafer is electrically connected to the signal output socket 122, and the annular mass body 13 is fixed at an edge of a lower surface of the piezoelectric wafer.
Wherein, the preferred cylinder of stainless steel of casing 11, its upper end ring is provided with the external screw thread, and the preferred spiral cap of stainless steel of lid 12, its inner wall ring have with casing 11 external screw thread complex internal thread, press from both sides between casing 11 and the lid 12 and be equipped with sealing washer 17 to avoid the sea water to get into cavity 111 through the junction of casing 11 and lid 12.
In the present embodiment, the connection member 121 is preferably a suspension stud, and the joint between the signal output socket 122 and the cover 12 is provided with a sealing ring 17.
In this embodiment, the annular mass body 13 is preferably an iron ring, and the iron ring may be fixedly connected to the piezoelectric wafer by means of gluing, screw insertion, or the like.
In this embodiment, the piezoceramics piece includes brass substrate 151 and attached piezoceramics piece 152 at brass substrate 151 upper surface, brass substrate 151 and piezoceramics piece 152 are connected through two heart yearn terminals of a wire and signal output socket 122 respectively, when the cable insulation trouble fixed point, the fault point produces powerful burst vibrations sound wave and can make brass substrate 151 take place deformation under the highly compressed effect of impact, can produce piezoelectric effect at piezoceramics piece 152 two poles of the earth when brass substrate 151 takes place deformation, accomplish the acoustoelectric conversion, piezoceramics piece 152 passes through the wire with the voltage that produces and transmits for signal output socket 122, realize signal output.
In the present embodiment, the outer diameter of the annular mass body 13 is the same as the outer diameter of the brass substrate 151.
In this embodiment, the support assembly includes a support member 141 and a fixing member 142, a lower end of the support member 141 is vertically embedded in the bottom surface of the housing 11, a center of the piezoelectric wafer has a mounting hole coaxial with the central hole of the annular mass body 13, an upper end of the fixing member 142 is located on the upper surface of the piezoelectric wafer, and a lower end of the fixing member 142 is vertically embedded in the upper end surface of the support member 141 after passing through the mounting hole of the piezoelectric wafer and the central hole of the annular mass body 13.
In this embodiment, the fixing element 142 is a screw, an insulating spacer 16 is sandwiched between the screw and the piezoelectric wafer, and the insulating spacer 16 can reduce the extrusion damage to the surface of the piezoelectric wafer when the fixing element 142 connects the supporting element 142 and the piezoelectric wafer, and can electrically insulate the fixing element 142 from the piezoelectric ceramic 152, so as to avoid the influence of the fixing element 142 on the piezoelectric effect of the piezoelectric wafer.
As shown in fig. 1 and 3, the hydrofoil 20 includes a fixed disk 21 and two fins 22, wherein the fixed disk 21 and the fins 22 are made of stainless steel material to avoid seawater erosion, the two fins 22 are orthogonal to each other and vertically fixed on the lower surface of the fixed disk 21, preferably, the two fins 22 are detachably connected to the fixed disk 21 through four stainless steel angle steels 23 disposed at the ends thereof, and the provision of the mutually orthogonal fins 22 helps to increase the effective area of the sonar sensor 10 for receiving the shocking sound wave, thereby improving the underwater sensitivity of the sonar sensor 10.
In this embodiment, the center of the upper surface of the fixed disc 21 is fixedly provided with an internal threaded column 24, the lower surface of the outer wall of the housing 11 is fixedly provided with an external threaded column 18 screwed with the internal threaded column 24, the detachable connection between the hydrofoil 20 and the sonar sensor 10 is realized in a manner that the internal threaded column 24 is matched with the external threaded column 18, and the installation manner is simple, convenient and quick.
The use method of the positioning device provided by the embodiment comprises the following steps: two positioning devices are arranged in a cable fault area at intervals, each positioning device is connected with a data processor on a test ship in a mode that a signal cable 123 is matched with a signal output socket 122, meanwhile, the positioning devices are hung below the sea surface in a mode that a rope is matched with a connecting piece 121, when an insulation fault point of a transmission cable is positioned, impact high voltage for puncturing the fault point is applied to the fault cable, the test ship slowly runs near a fault distance preset by a cable fault tester and a sea area, and two positioning devices under the sea directly detect burst sound emitted by the fault point of the sea cable when the high voltage impacts, so that accurate fault positions and routes of the sea cable can be calibrated in due time.
The principle of the positioning device provided by the embodiment is as follows: the sound wave in water is converted into electric signals through the piezoelectric effect and is provided to various signal processing circuits and terminal equipment so as to determine the direction, the amplitude, the distance and the cable route of the sound source. Specifically, in this embodiment, the brass substrate 151 deforms when subjected to a burst vibration sound wave under the action of an impact high pressure, and the brass substrate 151 deforms and simultaneously generates piezoelectricity at two poles of the piezoelectric ceramic sheet 152, that is, by using the piezoelectric effect of the piezoelectric wafer, the magnitude of a voltage signal generated by the piezoelectric ceramic sheet 152 is proportional to the deformation of the brass substrate 151, and the deformation of the brass substrate 151 is proportional to the vibration force, and a simple piezoelectric wafer has a small deformation, relatively low sensitivity, low signal-to-noise ratio and poor environmental noise interference resistance, and by adding the annular mass body 13 to the lower surface of the piezoelectric wafer, the deformation of the brass substrate 151 under the action of the vibration is greatly increased, so that the sound-electricity conversion efficiency of the piezoelectric wafer is improved, and in addition, the hydrofoil 20 is arranged below the sonar sensor 10 to help increase the area of the sonar sensor 10 receiving the vibration sound wave, the sensitivity and the signal-to-noise ratio of the sonar transducer 10 are improved, thereby obtaining a wider detection range and a longer detection length.
The positioning device provided by the embodiment can complete a fault test in several days in the prior art by one-time sea test, thereby greatly saving manpower and material resources and obtaining huge social and economic benefits.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
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, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
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 (9)
1. A positioning device for detecting power cable faults and routing under the sea surface, characterized by comprising a sonar sensor (10) having a waterproof function and a hydrofoil (20) fixedly arranged directly below the sonar sensor (10), the sonar sensor (10) comprising:
a shell (11), wherein the upper end of the shell (11) is provided with an opening, and the opening extends into the shell (11) to form a cavity (111);
the cover body (12), the said cover body (12) is connected to said opening sealingly, the cover body (12) is used for connecting the connecting piece (121) and signal output socket (122) inserted signal cable (123) that the rope connects;
the piezoelectric wafer is arranged in the cavity (111) through a supporting component and is electrically connected with the signal output socket (122);
and the annular mass body (13), the said annular mass body (13) is fixed on the edge of the lower surface of the said piezoelectric crystal plate.
2. The device as claimed in claim 1, wherein the piezoelectric wafer comprises a wafer-type brass substrate (151) and a piezoelectric ceramic plate (152) attached to the upper surface of the brass substrate (151), and the brass substrate (151) and the piezoelectric ceramic plate (152) are respectively connected to two core wire terminals of the signal output socket (122) through a conductive wire.
3. A positioning device for detecting faults and routing of power cables subsea according to claim 2, characterized in that the outer diameter of the annular mass (13) is the same as the outer diameter of the brass substrate (151).
4. A positioning device for detecting faults and routing of power cables subsea in accordance with claim 1,
the support assembly comprises a support member (141) and a fixing member (142), the lower end of the support member (141) is vertically embedded into the bottom surface of the shell (11), the center of the piezoelectric wafer is provided with a mounting hole coaxial with the central hole of the annular mass body (13), the upper end of the fixing member (142) is located on the upper surface of the piezoelectric wafer, and the lower end of the fixing member (142) penetrates through the mounting hole of the piezoelectric wafer and the central hole of the annular mass body (13) and then is vertically embedded from the upper end surface of the support member (141).
5. The device as claimed in claim 4, wherein the fixing member (142) is a screw, and an insulating spacer (16) is sandwiched between the screw and the piezoelectric wafer.
6. A positioning device for detecting faults and routing of power cables offshore according to claim 1, characterized in that said hydrofoil (20) comprises a fixed disc (21) and two fins (22), said two fins (22) being orthogonal to each other and fixed perpendicularly to the lower surface of said fixed disc (21).
7. A positioning device for detecting faults and routing of power cables subsea in accordance with claim 6, wherein: the fin (22) is detachably connected with the fixed disc (21) through four stainless steel angle steels (23) arranged at the end parts of the fin.
8. A positioning device for detecting faults and routing of power cables under the sea surface according to claim 7, characterized in that the center of the upper surface of the fixing disc (21) is fixedly provided with an internally threaded column (24), and the lower surface of the outer wall of the housing (11) is fixedly provided with an externally threaded column (18) which is in threaded connection with the internally threaded column (24).
9. A positioning device for detecting faults and routing of power cables subsea in accordance with any one of claims 1 to 8, wherein: the shell (11) and the cover body (12) are both made of stainless steel materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920441888.0U CN209841994U (en) | 2019-04-03 | 2019-04-03 | Positioning device for detecting power cable fault and laying route under sea surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920441888.0U CN209841994U (en) | 2019-04-03 | 2019-04-03 | Positioning device for detecting power cable fault and laying route under sea surface |
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| CN209841994U true CN209841994U (en) | 2019-12-24 |
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| CN201920441888.0U Active CN209841994U (en) | 2019-04-03 | 2019-04-03 | Positioning device for detecting power cable fault and laying route under sea surface |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981940A (en) * | 2020-08-18 | 2020-11-24 | 山西汾西重工有限责任公司 | Cable ranging tool |
| CN113138364A (en) * | 2021-04-22 | 2021-07-20 | 华能澜沧江水电股份有限公司 | Landslide safety monitoring device and positioning method based on underwater photography equipment |
-
2019
- 2019-04-03 CN CN201920441888.0U patent/CN209841994U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981940A (en) * | 2020-08-18 | 2020-11-24 | 山西汾西重工有限责任公司 | Cable ranging tool |
| CN111981940B (en) * | 2020-08-18 | 2024-05-28 | 山西汾西重工有限责任公司 | Cable ranging tool |
| CN113138364A (en) * | 2021-04-22 | 2021-07-20 | 华能澜沧江水电股份有限公司 | Landslide safety monitoring device and positioning method based on underwater photography equipment |
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Effective date of registration: 20200901 Address after: Room 0701, unit 8, building 3, beipeihua community, Shajing village, Yanta District, Xi'an City, Shaanxi Province Patentee after: Xi'an xinfanghui Power Technology Co., Ltd Address before: 710065 1901, block B, Huaao building, No. 10, Keji Road, Xi'an City, Shaanxi Province Patentee before: Zhang Tao |