CN115993512A - Cable partial discharge monitoring device - Google Patents
Cable partial discharge monitoring device Download PDFInfo
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- CN115993512A CN115993512A CN202310281976.XA CN202310281976A CN115993512A CN 115993512 A CN115993512 A CN 115993512A CN 202310281976 A CN202310281976 A CN 202310281976A CN 115993512 A CN115993512 A CN 115993512A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a cable partial discharge monitoring device, which comprises a monitoring shell, a front-stage cable interface and a rear-stage cable interface, wherein the monitoring shell is provided with a front-stage cable interface; a main circuit board and an internal circuit board are arranged in the monitoring shell, a local discharge sensor is welded on the internal circuit board, and the local discharge sensor is close to a rear-stage cable interface; the main circuit board is provided with a singlechip and a communication module; the inside of monitoring shell is provided with the stroke subassembly, and stroke subassembly is close to rear cable interface department, and can realize establishing the installation and dismantling of circuit board in. The invention has the following advantages and effects: the power cable can be timely reminded when the power cable fails to cause partial discharge; the device also has the advantages of convenient installation and disassembly of the partial discharge sensor.
Description
Technical Field
The invention relates to the technical field of power cables, in particular to a cable partial discharge monitoring device.
Background
Along with the construction and transformation of urban distribution network in China, the high-voltage power cable is widely applied in power transmission due to the characteristics of small insulation distance between wires and the like of the high-voltage power cable which is generally laid in environments such as underground pipelines, tunnels and the like. High voltage power cables have very good physical and electrical properties, but faults and latent faults are common during operation.
A cable is an electrical energy or signal transmission device, typically consisting of several wires or groups of wires; for cables used for power transmission, it is necessary to improve the use safety of the power cable; the cable is influenced by electricity, heat and stress in long-term operation and improper operation in construction and installation processes, so that partial discharge of the cable is possibly caused by partial insulation defects, and if the partial discharge exists for a long time, the cable internal faults and even accidents are possibly caused. Therefore, the safety monitoring device can be arranged at the position where the cable is weak and easy to fail in series, and can prompt in time when the cable fails to cause partial discharge, so that the cable is effectively protected. The partial discharge sensor with the model of iHFCT-54 can be adopted for judging the partial discharge, but the partial discharge sensor is used as an electronic element, has hidden danger of damage and reduced sensitivity, and needs to be periodically disassembled for detection and maintenance; therefore, the cable partial discharge monitoring device should also have the advantage of convenient installation and disassembly of the partial discharge sensor under the condition that the cable ensures safety.
Disclosure of Invention
The invention aims to provide a cable partial discharge monitoring device which is used for solving the problems in the background technology.
The technical aim of the invention is realized by the following technical scheme: the cable partial discharge monitoring device comprises a monitoring shell, wherein a front-stage cable interface and a rear-stage cable interface through which a power supply cable passes are arranged on the monitoring shell, and a main circuit board is arranged inside the monitoring shell; an internal circuit board is further arranged in the monitoring shell, a local discharge sensor is welded on the internal circuit board, and the local discharge sensor is close to a rear-stage cable interface;
a singlechip and a communication module are arranged on the main circuit board, and the singlechip is connected with the partial discharge sensor; the communication module is connected with the singlechip and used for remote data interaction;
a stroke component is arranged in the monitoring shell, the stroke component is close to a rear cable interface, and the installation and the disassembly of the built-in circuit board can be realized through the stroke component.
The further arrangement is that: the left end of the monitoring shell is provided with a mounting groove, and the mounting groove is close to a rear-stage cable interface; the stroke assembly comprises a lower end stroke seat and an upper end stroke seat, the lower end stroke seat is fixed at the bottom of the mounting groove, a longitudinal guide rail is fixedly arranged at the upper end of the lower end stroke seat, and the upper end stroke seat is limited on the guide rail and can longitudinally slide along the guide rail; the upper end of the lower end stroke seat is fixedly provided with a first supporting table, the main circuit board is arranged on the first supporting table, the lower end of the upper end stroke seat is fixedly provided with a second supporting table, the built-in circuit board is arranged on the second supporting table, and the main circuit board and the built-in circuit board can form conductive insertion by pushing the upper end stroke seat to move downwards;
the two sides of the main circuit board are provided with grooves, and longitudinal positioning plates are placed in the grooves and can play a role in supporting and limiting the second supporting table.
The further arrangement is that: the partial discharge sensor is welded at the left half part of the lower end of the built-in circuit board and faces the rear-stage cable interface; the lower end of the built-in circuit board is sequentially welded with a first conductive longitudinal inverted rod, a second conductive longitudinal inverted rod and a third conductive longitudinal inverted rod from left to right, the upper end of the main circuit board is sequentially welded with a first conductive longitudinal upright rod, a second conductive longitudinal upright rod and a third conductive longitudinal upright rod from left to right, and a first through hole, a second through hole and a third through hole are sequentially formed in the second supporting table from left to right;
the first longitudinal inverted rod can be in contact with the first longitudinal upright rod and form conductive connection, the first longitudinal inverted rod and the first longitudinal upright rod can pass through the first through hole, the first longitudinal inverted rod is positioned at the left side of the first longitudinal upright rod, the lower end part of the first longitudinal inverted rod can be abutted against the upper end of the main circuit board, the lower end of the built-in circuit board is provided with a first concave groove, and the upper end part of the first longitudinal upright rod can penetrate into and be abutted against the first concave groove;
the second longitudinal inverted rod can be in contact with the second longitudinal upright rod and form conductive connection, the second longitudinal inverted rod and the second longitudinal upright rod can pass through the second through hole, the second longitudinal inverted rod is positioned on the right side of the second longitudinal upright rod, the lower end part of the second longitudinal inverted rod can be abutted against the upper end of the main circuit board, the lower end of the built-in circuit board is provided with a second concave groove, and the upper end part of the second longitudinal upright rod can penetrate into and be abutted against the second concave groove; the second through hole is internally provided with a step, the second vertical rod is provided with an extension section, and the extension section can be abutted against the step;
the third longitudinal inverted rod can be in contact with the third longitudinal upright rod and form conductive connection, the third longitudinal inverted rod and the third longitudinal upright rod can penetrate through the third through hole, the third longitudinal inverted rod is located on the right side of the third longitudinal upright rod, the lower end of the third longitudinal inverted rod can be abutted to the upper end of the main circuit board, the lower end of the built-in circuit board is provided with a third concave groove, and the upper end of the third longitudinal upright rod can penetrate into and be abutted to the third concave groove.
The further arrangement is that: and the monitoring shell is internally provided with a passageway for communicating the partial discharge sensor with a rear-stage cable interface.
The further arrangement is that: the second support table is provided with an inward sinking groove on the left side of the first longitudinal reverse rod, the right side of the second longitudinal reverse rod and the right side of the third longitudinal reverse rod, and reinforcing components are arranged in each inward sinking groove; the reinforcing component comprises a reinforcing ball and a return spring, the return spring is arranged between the reinforcing ball and the bottom of the inward sink groove in a compression mode, the reinforcing ball is pushed to move towards the notch of the inward sink groove by the elastic acting force of the return spring, and a welding section which enables the reinforcing ball to only partially extend out of the notch of the inward sink groove is fixedly arranged at the notch of the inward sink groove;
reinforcing caulking grooves are formed in the left side of the first longitudinal inverted rod, the right side of the second longitudinal inverted rod and the right side of the third longitudinal inverted rod, and reinforcing balls can be embedded into the corresponding reinforcing caulking grooves to reinforce the first longitudinal inverted rod, the second longitudinal inverted rod and the third longitudinal inverted rod respectively.
The further arrangement is that: the travel assembly further comprises an auxiliary driving assembly, the auxiliary driving assembly comprises a driving shell, a transverse inner cavity is formed in the driving shell, a piston is slidably arranged in the transverse inner cavity, the piston divides the transverse inner cavity into a left inner cavity and a right inner cavity, and a linkage rod is arranged on the piston; the left side of the driving shell is provided with a linkage seat, the linkage seat is rotatably provided with a rotating disc, the rotating disc consists of a semicircular rotating part and a convex connecting part, and the linkage rod extends into the linkage seat and is fixed on the connecting part, and the rotating disc is driven to rotate based on the action of the piston; a driving gear synchronously rotating along with the rotating disc is arranged at the bottom of the rotating disc, a longitudinal driving rod is fixedly arranged on the right side of the upper end stroke seat, a tooth slot meshed with the driving gear is arranged on the driving rod, and the driving rod is driven to longitudinally move based on the rotation of the driving gear; the right side of the driving shell is provided with a first gas injection port communicated with the right inner cavity, the first gas injection port is connected with a first gas guide pipe, and the first gas guide pipe extends to the upper end surface of the monitoring shell.
The further arrangement is that: the right side of the upper end travel seat is fixedly provided with a limiting block, the inside of the monitoring shell is provided with an inner limiting seat, the inner limiting seat can be attached to the limiting block, a limiting cavity is formed in the inner limiting seat, a pushing block is movably arranged in the limiting cavity, the center of the pushing block is hollowed out and used for placing an inner spring, the right end of the inner spring is abutted against the right side wall of the limiting cavity, the pushing block is pushed left through the elastic acting force of the inner spring, the left end of the pushing block is a limiting section, the limiting section consists of inclined sections with two end sections connected, the right side of the limiting block is provided with a limiting caulking groove, and the limiting section can be embedded into the limiting caulking groove to achieve the purpose of limiting the limiting of the limiting block; the inner limit seat is internally provided with a second gas injection port connected with the inclined section, the inner limit seat is internally provided with an injection channel connected with the second gas injection port, the injection channel is connected with a second gas guide pipe, and the second gas guide pipe extends to the upper end surface of the monitoring shell.
The further arrangement is that: two guide rods are fixedly arranged at the upper end of the lower end stroke seat, the two guide rods are separated at two sides of the guide rail, and the upper end stroke seat penetrates through the guide rods;
the upper end of the guide rod is fixedly provided with a lantern ring, and the purpose of limiting the upper end travel seat is achieved through the lantern ring.
The invention has the beneficial effects that:
1. in the invention, the partial discharge condition of the power cable in the monitoring shell is obtained through the partial discharge sensor arranged on the built-in circuit board in the monitoring shell and fed back to the singlechip; the singlechip 31 is sent to a user in time, so that the purpose of protecting the cable is achieved; meanwhile, the interaction of data can be realized through the set communication module.
2. In the invention, the partial discharge sensor is used as an electronic element, and hidden danger of damage and reduced sensitivity exists, so a stroke assembly is arranged to detect and maintain the partial discharge sensor after disassembly. The stroke assembly comprises a lower-end stroke seat and an upper-end stroke seat, the main circuit board is arranged on a first supporting table of the lower-end stroke seat, the built-in circuit board is arranged on a second supporting table of the upper-end stroke seat, and the upper-end stroke seat is limited on the guide rail and can longitudinally slide along the guide rail; therefore, a user can realize that the main circuit board and the built-in circuit board form conductive insertion by pushing the upper end stroke seat downwards through force application; when the built-in circuit board is required to be disassembled, the upper end stroke seat is pulled up. In addition, the grooving and the longitudinal positioning plates play a role in supporting and limiting the second supporting table.
3. In order to ensure the conductive insertion of the built-in circuit board and the main circuit board, a first conductive longitudinal inverted rod, a second conductive longitudinal inverted rod and a third conductive longitudinal inverted rod are sequentially welded at the lower end of the built-in circuit board from left to right, and a first conductive longitudinal upright rod, a second conductive longitudinal upright rod and a third conductive longitudinal upright rod are sequentially welded at the upper end of the main circuit board from left to right; the first through hole, the second through hole and the third through hole are formed in the second supporting table and used for penetrating; the first longitudinal reverse rod is positioned on the left side of the first longitudinal vertical rod, the second longitudinal reverse rod is positioned on the right side of the second longitudinal vertical rod, and the third longitudinal reverse rod is positioned on the right side of the third longitudinal vertical rod, so that the arrangement can effectively prevent the reverse connection of the built-in circuit board and the main circuit board and avoid the damage of the local discharge sensor due to the reverse connection. The lower end of the first longitudinal reverse rod can be abutted with the upper end of the main circuit board, the upper end of the first longitudinal vertical rod can penetrate into and be abutted in the first concave groove, reverse connection can be further prevented, a positioning and supporting effect can be achieved, and stable conductive contact between the built-in circuit board and the main circuit board is ensured. Meanwhile, a step is formed in the second through hole, an extension section is arranged on the second longitudinal upright rod, and the extension section is propped against the step, so that the stable conductive contact stability of the built-in circuit board and the main circuit board can be improved.
4. In the invention, the passageway which is used for communicating the partial discharge sensor with the rear-stage cable interface is arranged in the monitoring shell, and the detection result of the partial discharge sensor is more accurate by arranging the passageway.
5. In the invention, the second supporting table is provided with the inward sink grooves on the left side of the first longitudinal reverse rod, the right side of the second longitudinal reverse rod and the right side of the third longitudinal reverse rod, and the setting positions of the inward sink grooves are far away from the first longitudinal vertical rod, the second longitudinal vertical rod and the third longitudinal vertical rod, so that the situation that the first longitudinal reverse rod, the second longitudinal reverse rod and the third longitudinal reverse rod are difficult to insert due to the fact that the first longitudinal vertical rod, the second longitudinal vertical rod and the third longitudinal vertical rod are extrapolated is effectively avoided; meanwhile, a reinforcing component is arranged in the invagination groove, a reinforcing ball is pushed outwards through a return spring in the reinforcing component, and the reinforcing ball can only be embedded into a corresponding reinforcing caulking groove, so that the first longitudinal inverted rod, the second longitudinal inverted rod and the third longitudinal inverted rod are reinforced respectively; the arrangement of the welding section can prevent the reinforcing ball from completely falling out of the inward sink.
6. In the invention, the first longitudinal reverse rod, the second longitudinal reverse rod and the third longitudinal reverse rod cannot directly move downwards to be abutted with the upper end of the main circuit board due to the blocking of the reinforcing ball; therefore, the auxiliary driving assembly is arranged to drive the built-in circuit board to move downwards, so that the first longitudinal inverted rod, the second longitudinal inverted rod and the third longitudinal inverted rod cannot move downwards to be abutted against the upper end of the main circuit board; the auxiliary driving assembly comprises a driving shell, a left inner cavity and a right inner cavity are formed by separating a transverse inner cavity in the driving shell by a piston, a first gas injection port is connected to the right inner cavity, the first gas injection port is led out through a first gas guide pipe, and gas is injected/extracted through the first gas guide pipe, so that the reciprocating movement of the piston can be controlled; the piston is connected with the rotating disc through a connecting rod, the rotating disc is driven to rotate through the action of the piston, a driving gear which synchronously rotates along with the rotating disc is arranged at the bottom of the rotating disc, a longitudinal driving rod is fixedly arranged on the right side of the upper end stroke seat, a tooth slot meshed with the driving gear is arranged on the driving rod, and the driving rod is driven to longitudinally move based on the rotation of the driving gear; therefore, the upper end stroke seat is moved downwards through the driving rod, and the first longitudinal inverted rod, the second longitudinal inverted rod and the third longitudinal inverted rod can push away the reinforcing ball, and then move downwards to be abutted with the upper end of the main circuit board; the structure is more reasonable, and the labor-saving advantage is achieved.
7. In order to further improve the conductive stability of the built-in circuit board and the main circuit board, the invention is provided with the inner limit seat, and the limit section of the push block is pushed to be embedded into the limit caulking groove of the limit block by the inner spring in the inner limit seat, so that the fixing stability of the upper end stroke seat is effectively improved. Simultaneously, in order to conveniently remove the fixed to upper end stroke seat, set up second gas-injection mouth and second air duct, inject gas through the second air duct and come right push away the ejector pad, and then let the spacing section of ejector pad break away from the spacing caulking groove of stopper to effectively realize removing the fixed to upper end stroke seat, have easy operation, advantage that the practicality is strong.
8. In the invention, the upper end stroke seat is better guided by arranging the guide rod, and the sleeve ring can play a role in limiting the upper end stroke seat.
Drawings
FIG. 1 is a schematic diagram of an embodiment;
fig. 2 is an enlarged view of a portion a in fig. 1;
fig. 3 is an enlarged view of a portion B in fig. 2;
FIG. 4 is a schematic block diagram of an embodiment;
fig. 5 is an enlarged view of a portion C in fig. 3;
fig. 6 is an enlarged view of the portion D of fig. 2;
fig. 7 is a schematic structural diagram of the auxiliary driving assembly after hiding the driving housing in the embodiment.
In the figure: 11. monitoring the housing; 12. a front-end cable interface; 13. a rear-stage cable interface; 21. A main circuit board; 22. a circuit board is arranged in the circuit board; 23. a partial discharge sensor; 31. a single chip microcomputer; 32. a communication module; 41. A mounting groove; 42. a lower end travel seat; 421. a first support table; 43. an upper end travel seat; 431. a second support table; 44. a guide rail; 45. slotting; 46. a longitudinal positioning plate; 47. a guide rod; 48. a collar; 511. a first longitudinal backstay; 512. a second longitudinal backstay; 513. a third longitudinal backstop; 521. a first longitudinal upright; 522. a second longitudinal upright; 523. a third longitudinal upright; 541. a first concave groove; 542. a second concave groove; 543. a third concave groove; 55. a step; 62. an aisle; 71. an invagination groove; 72. reinforcing balls; 73. a return spring; 74. a welding section; 75. reinforcing the caulking groove; 81. a drive housing; 82. a piston; 83. a linkage rod; 84. a linkage seat; 851. a rotating part; 852. a connection part; 86. a drive gear; 87. a driving rod; 881. a first gas injection port; 882. a first air duct; 91. a limiting block; 92. an inner limit seat; 93. a spacing cavity; 94. a pushing block; 941. a limiting section; 95. an inner spring; 961. a second gas injection port; 962. an injection channel; 963. and a second air duct.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 7, the present embodiment discloses a cable partial discharge monitoring device, which includes a monitoring housing 11, a front cable interface 12 through which a power supply cable passes and a rear cable interface 13 connected at a rear stage are disposed on the monitoring housing 11, and a main circuit board 21 is disposed inside the monitoring housing 11; the monitoring shell 11 is also internally provided with an internally arranged circuit board 22, a local discharge sensor 23 is welded on the internally arranged circuit board 22, and the local discharge sensor 23 is close to the rear-stage cable interface 13; the model of the partial discharge sensor 23 is iHFCT-54;
a singlechip 31 and a communication module 32 are arranged on the main circuit board 21, and the singlechip 31 is connected with a partial discharge sensor; the communication module 32 is connected with the singlechip 31 and is used for remote data interaction;
a stroke component is arranged in the monitoring shell 11, the stroke component is close to the rear cable interface 13, and the installation and the disassembly of the built-in circuit board 22 can be realized through the stroke component.
The left end of the monitoring shell 11 is provided with a mounting groove 41, and the mounting groove 41 is close to the rear-stage cable connector 13; the stroke assembly comprises a lower end stroke seat 42 and an upper end stroke seat 43, wherein the lower end stroke seat 42 is fixed at the bottom of the mounting groove 41, a longitudinal guide rail 44 is fixedly arranged at the upper end of the lower end stroke seat 42, and the upper end stroke seat 43 is limited on the guide rail 44 and can longitudinally slide along the guide rail 44; the upper end of the lower end stroke seat 42 is fixedly provided with a first supporting table 421, the main circuit board 21 is arranged on the first supporting table 421, the lower end of the upper end stroke seat 43 is fixedly provided with a second supporting table 431, the built-in circuit board 22 is arranged on the second supporting table 431, and the main circuit board 21 and the built-in circuit board 22 can form conductive insertion and matching by pushing the upper end stroke seat 43 to move downwards;
Wherein, the partial discharge sensor 23 is welded at the left half part of the lower end of the built-in circuit board 22 and faces the rear cable interface 13; the lower end of the built-in circuit board 22 is welded with a first conductive longitudinal reverse rod 511, a second longitudinal reverse rod 512 and a third longitudinal reverse rod 513 in sequence from left to right, the upper end of the main circuit board 21 is welded with a first conductive longitudinal vertical rod 521, a second longitudinal vertical rod 522 and a third longitudinal vertical rod 523 in sequence from left to right, and a first through hole, a second through hole and a third through hole are formed in the second support table 431 in sequence from left to right;
the first longitudinal reverse rod 511 can be in contact with the first longitudinal vertical rod 521 and form conductive connection, and the first longitudinal reverse rod 511 and the first longitudinal vertical rod 521 can pass through the first through hole, the first longitudinal reverse rod 511 is positioned at the left side of the first longitudinal vertical rod 521, the lower end part of the first longitudinal reverse rod 511 can be abutted against the upper end of the main circuit board 21, the lower end of the built-in circuit board 22 is provided with a first concave groove 541, and the upper end part of the first longitudinal vertical rod 521 can penetrate into and be abutted against the first concave groove 541;
the second longitudinal reverse rod 512 can be in contact with the second longitudinal vertical rod 522 and form conductive connection, and the second longitudinal reverse rod 512 can pass through the second through hole, the second longitudinal reverse rod 512 is positioned on the right side of the second longitudinal vertical rod 522, the lower end part of the second longitudinal reverse rod 512 can be abutted against the upper end of the main circuit board 21, the lower end of the built-in circuit board 22 is provided with a second concave groove 542, and the upper end part of the second longitudinal vertical rod 522 can penetrate into and be abutted against the second concave groove 542; a step 55 is formed in the second through hole, an extension section is arranged on the second longitudinal upright rod 522, and the extension section can be abutted against the step 55;
the third longitudinal reverse rod 513 can contact with the third longitudinal vertical rod 523 and form conductive connection, and the third longitudinal reverse rod 513 can pass through the third through hole, the third longitudinal reverse rod 513 is positioned on the right side of the third longitudinal vertical rod 523, the lower end part of the third longitudinal reverse rod 513 can be abutted against the upper end of the main circuit board 21, the lower end of the built-in circuit board 22 is provided with a third concave groove 543, and the upper end part of the third longitudinal vertical rod 523 can penetrate into and be abutted against the third concave groove 543.
Wherein, the monitoring shell 11 is provided with a passageway 62 for the partial discharge sensor 23 to communicate with the rear cable interface 13.
The second support stand 431 has an indent 71 on the left side of the first longitudinal bar 511, the right side of the second longitudinal bar 512 and the right side of the third longitudinal bar 513, and a reinforcing component is disposed in each indent 71; the reinforcement assembly comprises a reinforcement ball 72 and a return spring 73, wherein the return spring 73 is arranged between the reinforcement ball 72 and the bottom of the inward sink 71 in a compression mode, the reinforcement ball 72 is pushed to move towards the notch of the inward sink 71 by the elastic acting force of the return spring 73, and a welding section 74 which enables the reinforcement ball 72 to only partially extend out of the notch of the inward sink 71 is fixedly arranged at the notch of the inward sink 71;
reinforcing caulking grooves 75 are formed on the left side of the first longitudinal reverse bar 511, the right side of the second longitudinal reverse bar 512 and the right side of the third longitudinal reverse bar 513, and the reinforcing balls 72 can be inserted into the corresponding reinforcing caulking grooves 75 to reinforce the first longitudinal reverse bar 511, the second longitudinal reverse bar 512 and the third longitudinal reverse bar 513 respectively.
The stroke assembly further comprises an auxiliary driving assembly, the auxiliary driving assembly comprises a driving shell 81, a transverse inner cavity is formed in the driving shell 81, a piston 82 is slidably arranged in the transverse inner cavity, the piston 82 divides the transverse inner cavity into a left inner cavity and a right inner cavity, and a linkage rod 83 is arranged on the piston 82; a linkage seat 84 is arranged on the left side of the driving housing 81, a rotating disc is rotatably arranged on the linkage seat 84, the rotating disc consists of a semicircular rotating part 851 and a protruding connecting part 852, and a linkage rod 83 extends into the linkage seat 84 and is fixed on the connecting part 852 to drive the rotating disc to rotate based on the action of a piston 82; a driving gear 86 synchronously rotating along with the driving gear 86 is arranged at the bottom of the rotating disc, a longitudinal driving rod 87 is fixedly arranged on the right side of the upper end stroke seat 43, a tooth slot meshed with the driving gear 86 is arranged on the driving rod 87, and the driving rod 87 is driven to longitudinally move based on the rotation of the driving gear 86; a first gas injection port 881 communicating with the right inner cavity is provided on the right side of the driving housing 81, and a first gas guide tube 882 is connected to the first gas injection port 881, and the first gas guide tube 882 extends to the upper end surface of the monitoring housing 11.
The right side of the upper end stroke seat 43 is fixedly provided with a limit block 91, the inside of the monitoring shell 11 is provided with an inner limit seat 92, the inner limit seat 92 can be attached to the limit block 91, a limit cavity 93 is formed in the inner limit seat 92, a push block 94 is movably arranged in the limit cavity 93, the center of the push block 94 is hollowed out and used for placing an inner spring 95, the right end of the inner spring 95 is abutted against the right side wall of the limit cavity 93, the push block 94 is pushed left by the elastic acting force of the inner spring 95, the left end of the push block 94 is a limit section 941, the limit section 941 consists of inclined sections with two end sections connected, the right side of the limit block 91 is provided with a limit caulking groove, and the limit section 941 can be embedded into the limit caulking groove so as to achieve the aim of limiting the limit block 91; a second gas injection port 961 connected with the inclined section is arranged in the inner limit seat 92, and an injection channel 962 connected with the second gas injection port 961 is arranged in the inner limit seat 92, a second gas guide pipe 963 is connected to the injection channel 962, and the second gas guide pipe 963 extends to the upper end surface of the monitoring housing 11.
Wherein, two guide rods 47 are fixedly arranged at the upper end of the lower end stroke seat 42, the two guide rods 47 are separated at two sides of the guide rail 44, and the upper end stroke seat 43 passes through the guide rods 47; a collar 48 is fixedly arranged at the upper end of the guide rod 47, and the purpose of limiting the upper end stroke seat 43 is achieved through the collar 48.
The working principle of the embodiment is as follows: in the embodiment, the partial discharge condition of the power cable in the monitoring shell 11 is acquired through a partial discharge sensor 23 arranged on a built-in circuit board 22 inside the monitoring shell 11 and fed back to the main circuit board 21; when the partial discharge is abnormal, the singlechip 31 is sent to a user in time, so that the purpose of protecting the cable is achieved; meanwhile, the interaction of data can be realized through the communication module 32.
In this embodiment, since the partial discharge sensor 23 is used as an electronic component, there are risks of damage and sensitivity decrease, and therefore a stroke assembly is provided to perform detection and maintenance after the partial discharge sensor 23 is disassembled. The stroke assembly comprises a lower end stroke seat 42 and an upper end stroke seat 43, the main circuit board 21 is arranged on a first supporting table 421 of the lower end stroke seat 42, the built-in circuit board 22 is arranged on a second supporting table 431 of the upper end stroke seat 43, and the upper end stroke seat 43 is limited on the guide rail 44 and can longitudinally slide along the guide rail 44; thus, the user can realize that the main circuit board 21 and the built-in circuit board 22 form conductive plug-in connection by pushing the upper end stroke seat 43 downwards by applying force; when the built-in circuit board 22 is to be removed, the upper stroke seat 43 is pulled up.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Claims (8)
1. The utility model provides a cable partial discharge monitoring devices which characterized in that: the monitoring device comprises a monitoring shell (11), wherein a front-stage cable interface (12) and a rear-stage cable interface (13) through which a power supply cable passes are arranged on the monitoring shell (11), a main circuit board (21) is arranged inside the monitoring shell (11), an inner circuit board (22) is also arranged inside the monitoring shell (11), a partial discharge sensor (23) is welded on the inner circuit board (22), and the partial discharge sensor (23) is close to the rear-stage cable interface (13); a singlechip (31) and a communication module (32) are arranged on the main circuit board (21), and the singlechip (31) is connected with the partial discharge sensor (23); the communication module (32) is connected with the singlechip (31) and is used for remote data interaction; a stroke component is arranged in the monitoring shell (11), the stroke component is close to the rear cable interface (13), and the installation and the disassembly of the built-in circuit board (22) can be realized through the stroke component.
2. The cable partial discharge monitoring device of claim 1, wherein: the left end of the monitoring shell (11) is provided with a mounting groove (41), and the mounting groove (41) is close to the rear-stage cable interface (13); the stroke assembly comprises a lower end stroke seat (42) and an upper end stroke seat (43), wherein the lower end stroke seat (42) is fixed at the bottom of the mounting groove (41), a longitudinal guide rail (44) is fixedly arranged at the upper end of the lower end stroke seat (42), and the upper end stroke seat (43) is limited on the guide rail (44) and can longitudinally slide along the guide rail (44); the upper end of the lower end stroke seat (42) is fixedly provided with a first supporting table (421), the main circuit board (21) is arranged on the first supporting table (421), the lower end of the upper end stroke seat (43) is fixedly provided with a second supporting table (431), the built-in circuit board (22) is arranged on the second supporting table (431), and the main circuit board (21) and the built-in circuit board (22) can form conductive insertion by pushing the upper end stroke seat (43) to move downwards;
the two sides of the main circuit board (21) are provided with grooves (45), and longitudinal positioning plates (46) are arranged in the grooves (45), and the longitudinal positioning plates (46) can play a role in supporting and limiting the second supporting table (431).
3. A cable partial discharge monitoring device according to claim 2, characterized in that: the partial discharge sensor (23) is welded at the left half part of the lower end of the built-in circuit board (22) and faces the rear-stage cable interface (13); the lower end of the built-in circuit board (22) is sequentially welded with a first conductive longitudinal inverted rod (511), a second conductive longitudinal inverted rod (512) and a third conductive longitudinal inverted rod (513) from left to right, the upper end of the main circuit board (21) is sequentially welded with a first conductive longitudinal upright rod (521), a second conductive longitudinal upright rod (522) and a third conductive longitudinal upright rod (523) from left to right, and a first through hole, a second through hole and a third through hole are sequentially formed in the second support table (431) from left to right;
the first longitudinal inverted rod (511) can be in contact with the first longitudinal upright rod (521) to form conductive connection, the first longitudinal inverted rod and the first longitudinal upright rod can penetrate through the first through hole, the first longitudinal inverted rod (511) is positioned at the left side of the first longitudinal upright rod (521), the lower end part of the first longitudinal inverted rod (511) can be abutted against the upper end of the main circuit board (21), the lower end of the built-in circuit board (22) is provided with a first concave groove (541), and the upper end part of the first longitudinal upright rod (521) can penetrate into and be abutted against the first concave groove (541);
the second longitudinal inverted rod (512) can be in contact with the second longitudinal upright rod (522) to form conductive connection, the second longitudinal inverted rod and the second longitudinal upright rod can pass through the second through hole, the second longitudinal inverted rod (512) is positioned on the right side of the second longitudinal upright rod (522), the lower end part of the second longitudinal inverted rod (512) can be abutted against the upper end of the main circuit board (21), the lower end of the built-in circuit board (22) is provided with a second concave groove (542), and the upper end part of the second longitudinal upright rod (522) can penetrate into and be abutted against the second concave groove (542); a step (55) is formed in the second through hole, an extension section is arranged on the second longitudinal upright rod (522), and the extension section can be abutted against the step (55);
the third longitudinal reverse rod (513) can be in contact with the third longitudinal vertical rod (523) and form conductive connection, the third longitudinal reverse rod and the third longitudinal vertical rod can penetrate through the third through hole, the third longitudinal reverse rod (513) is located on the right side of the third longitudinal vertical rod (523), the lower end portion of the third longitudinal reverse rod (513) can be abutted against the upper end of the main circuit board (21), the lower end of the built-in circuit board (22) is provided with a third concave groove (543), and the upper end portion of the third longitudinal vertical rod (523) can penetrate into and be abutted against the third concave groove (543).
4. A cable partial discharge monitoring device according to claim 3, characterized in that: the monitoring shell (11) is internally provided with a passageway (62) for communicating the partial discharge sensor (23) with the rear-stage cable interface (13).
5. A cable partial discharge monitoring device according to claim 3, characterized in that: the second support table (431) is provided with an inward sinking groove (71) on the left side of the first longitudinal reverse rod (511), the right side of the second longitudinal reverse rod (512) and the right side of the third longitudinal reverse rod (513), and reinforcing components are arranged in each inward sinking groove (71); the reinforcing component comprises a reinforcing ball (72) and a return spring (73), wherein the return spring (73) is arranged between the reinforcing ball (72) and the bottom of the inward-sinking groove (71) in a compression mode, the reinforcing ball (72) is pushed to move towards the notch of the inward-sinking groove (71) through the elastic acting force of the return spring (73), and a welding section (74) which enables the reinforcing ball (72) to only partially extend out of the notch of the inward-sinking groove (71) is fixedly arranged at the notch of the inward-sinking groove (71);
reinforcing caulking grooves (75) are formed in the left side of the first longitudinal inverted rod (511), the right side of the second longitudinal inverted rod (512) and the right side of the third longitudinal inverted rod (513), and the reinforcing balls (72) can be embedded into the corresponding reinforcing caulking grooves (75) so as to reinforce the first longitudinal inverted rod (511), the second longitudinal inverted rod (512) and the third longitudinal inverted rod (513) respectively.
6. The cable partial discharge monitoring device of claim 5, wherein: the travel assembly further comprises an auxiliary driving assembly, the auxiliary driving assembly comprises a driving shell (81), a transverse inner cavity is formed in the driving shell (81), a piston (82) is slidably arranged in the transverse inner cavity, the piston (82) divides the transverse inner cavity into a left inner cavity and a right inner cavity, and a linkage rod (83) is arranged on the piston (82); a linkage seat (84) is arranged on the left side of the driving shell (81), a rotating disc is rotatably arranged on the linkage seat (84), the rotating disc consists of a semicircular rotating part (851) and a protruding connecting part (852), and the linkage rod (83) extends into the linkage seat (84) and is fixed on the connecting part (852) to drive the rotating disc to rotate based on the action of the piston (82); a driving gear (86) synchronously rotating along with the driving gear is arranged at the bottom of the rotating disc, a longitudinal driving rod (87) is fixedly arranged on the right side of the upper end stroke seat (43), a tooth slot meshed with the driving gear (86) is arranged on the driving rod (87), and the driving rod (87) is driven to longitudinally move based on the rotation of the driving gear (86); the right side of the driving shell (81) is provided with a first gas injection port (881) communicated with the right inner cavity, the first gas injection port (881) is connected with a first gas guide pipe (882), and the first gas guide pipe (882) extends to the upper end surface of the monitoring shell (11).
7. A cable partial discharge monitoring device according to claim 2, characterized in that: the device is characterized in that a limiting block (91) is fixedly arranged on the right side of the upper end stroke seat (43), an inner limiting seat (92) is arranged in the monitoring shell (11), the inner limiting seat (92) can be attached to the limiting block (91), a limiting cavity (93) is formed in the inner limiting seat (92), a pushing block (94) is movably arranged in the limiting cavity (93), the center of the pushing block (94) is hollowed out and used for placing an inner spring (95), the right end of the inner spring (95) is abutted against the right side wall of the limiting cavity (93), the left end of the pushing block (94) is pushed to the left by the elastic acting force of the inner spring (95), the left end of the pushing block (94) is a limiting section (941), the limiting section (941) is composed of inclined sections with two end sections connected, and the right side of the limiting block (91) is provided with a limiting groove, and the limiting section (941) can be embedded into the limiting groove to achieve the limiting purpose of the limiting block (91); the inner limit seat (92) is internally provided with a second gas injection port (961) connected with the inclined section, the inner limit seat (92) is internally provided with an injection channel (962) connected with the second gas injection port (961), the injection channel (962) is connected with a second gas guide tube (963), and the second gas guide tube (963) extends to the upper end surface of the monitoring shell (11).
8. A cable partial discharge monitoring device according to claim 2, characterized in that: two guide rods (47) are fixedly arranged at the upper end of the lower end stroke seat (42), the two guide rods (47) are separated at two sides of the guide rail (44), and the upper end stroke seat (43) penetrates through the guide rods (47); a lantern ring (48) is fixedly arranged at the upper end of the guide rod (47), and the purpose of limiting the upper end travel seat (43) is achieved through the lantern ring (48).
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| CN202310281976.XA CN115993512B (en) | 2023-03-22 | 2023-03-22 | Cable partial discharge monitoring device |
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| CN202310281976.XA CN115993512B (en) | 2023-03-22 | 2023-03-22 | Cable partial discharge monitoring device |
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