阅读说明：本技术 一种电缆振荡波局部放电检测系统的屏蔽装置 (Shielding device of cable oscillatory wave partial discharge detection system ) 是由 刘青昆 于 2020-05-28 设计创作，主要内容包括：本发明提供一种电缆振荡波局部放电检测系统的屏蔽装置,包括具有一端开口的外壳体,所述外壳体的内腔中设有移动件,所述移动件与所述移动件可拆卸相连,所述移动件内部设有第一屏蔽板、第二屏蔽板、第三屏蔽板、第四屏蔽板,所述第一屏蔽板、第二屏蔽板、第三屏蔽板、第四屏蔽板将所述移动件内部分隔成第一空间、第二空间、第三空间、第四空间、第五空间,所述第一空间内设有电感以及电缆连接装置,所述第二空间内设有高压直流电源以及与所述高压直流电源并联的高压开关,所述第三空间内设有阻抗单元,所述第四空间内设有耦合单元,所述第五空间内设有控制终端,本发明能有效避免内、外电磁波对振荡波局部放电检测电路的影响。(The invention provides a shielding device of a cable oscillatory wave partial discharge detection system, which comprises an outer shell with an opening at one end, wherein a moving part is arranged in an inner cavity of the outer shell, the moving part is detachably connected with the moving part, a first shielding plate, a second shielding plate, a third shielding plate and a fourth shielding plate are arranged in the moving part, the moving part is internally divided into a first space, a second space, a third space, a fourth space and a fifth space by the first shielding plate, the second shielding plate, the third shielding plate and the fourth shielding plate, an inductor and a cable connecting device are arranged in the first space, a high-voltage direct current power supply and a high-voltage switch connected with the high-voltage direct current power supply in parallel are arranged in the second space, an impedance unit is arranged in the third space, a coupling unit is arranged in the fourth space, and a control terminal is arranged in the fifth space, the invention can effectively avoid the influence of the internal and external electromagnetic waves on the oscillation wave partial discharge detection circuit.)

1. A shielding device of a cable oscillatory wave partial discharge detection system is characterized by comprising an outer shell with an opening at one end, wherein a moving part is arranged in an inner cavity of the outer shell, the moving part is detachably connected with the moving part, a first shielding plate, a second shielding plate, a third shielding plate and a fourth shielding plate are arranged in the moving part, the moving part is internally divided into a first space, a second space, a third space, a fourth space and a fifth space by the first shielding plate, the second shielding plate, the third shielding plate and the fourth shielding plate, an inductor and a cable connecting device are arranged in the first space, a high-voltage direct current power supply and a high-voltage switch connected with the high-voltage direct current power supply in parallel are arranged in the second space, an impedance unit is arranged in the third space, a coupling unit is arranged in the fourth space, and a control terminal is arranged in the fifth space, the high-voltage direct-current power supply is electrically connected with the inductor and the cable connecting device in sequence, the cable connecting device is electrically connected with the impedance unit and the coupling unit respectively, and the impedance unit and the coupling unit are electrically connected with the control terminal.

2. The shielding device of the cable oscillatory wave partial discharge detection system according to claim 1, wherein a fixed cylinder is arranged at the bottom of the inner cavity of the outer housing, a driving motor, a connecting shaft, a worm and a first storage battery are arranged in the fixed cylinder, an output end of the driving motor is connected with one end of the connecting shaft, one end of the connecting shaft is rotatably connected with the inner wall of the fixed cylinder, the worm is sleeved on the connecting shaft, a worm rack is arranged at the bottom of the moving member, the worm is meshed with the worm rack, and the first storage battery supplies power to the driving motor.

3. The shielding apparatus of claim 2, wherein a roller is disposed at a bottom of the moving member, and the roller is disposed at a terminal side of the nut.

4. The shielding device of claim 1, wherein a cable port is disposed on a sidewall of the moving member, the cable connecting device is connected to the cable port, the cable connecting device includes a connecting rod, a cylinder, a second battery, and a control mechanism, the cylinder is fixedly connected to the first shielding plate via the connecting rod, an opening of the cylinder is connected to the cable port, an electrical connection portion and a cable clamping device are disposed inside the cylinder, a conductive rod and a contact switch are disposed at an end of the electrical connection portion, the contact switch is electrically connected to the control mechanism, the second battery supplies power to the cable clamping device, and the control mechanism is electrically connected to the cable clamping device.

5. The shielding device of the cable oscillatory wave partial discharge detection system according to claim 4, wherein the cable clamping device is symmetrically fixed on the inner wall of the cylinder, the cable clamping device comprises an electromagnet, a spring, a magnetic rod and a clamping jaw, the electromagnet is fixedly connected with the spring, the magnetic rod and the clamping jaw in sequence, the second storage battery supplies power to the electromagnet, and the control mechanism is used for switching on/off the power supply to the electromagnet.

6. The shielding device of claim 4, wherein an output end of the inductor is electrically connected to the electrical connection portion, and an output end of the electrical connection portion is electrically connected to the impedance unit and the coupling unit through wires.

7. The shielding device of the cable oscillatory wave partial discharge detection system according to claim 4, further comprising a first connecting conduit, a second connecting conduit, a third connecting conduit, a fourth connecting conduit, and a fifth connecting conduit, wherein the first shielding plate and the second shielding plate are respectively communicated with each other through the first connecting conduit and the second conduit;

the electric connection part and the lead of the impedance unit pass through the first connecting conduit;

the lead of the electric connection part and the coupling unit passes through the second connecting conduit;

the high-voltage direct-current power supply and the lead of the inductor penetrate through the third connecting guide pipe;

the impedance unit and the lead of the control terminal pass through the fourth connecting conduit;

the lead of the coupling unit and the control terminal passes through the fifth connecting conduit.

8. The shielding device of a cable oscillatory wave partial discharge detection system according to claim 1, it is characterized in that a filter and a heat dissipation mechanism are arranged in the first space, the output end of the high-voltage direct current power supply is connected with the filter, the output end of the filter is electrically connected with the inductor through a lead, the heat dissipation mechanism comprises a heat conduction rod, a thermal deformation mechanism, a semiconductor refrigeration piece and a conductive rod, the heat conducting rod is arranged around the high-voltage direct-current power supply, the end part of the heat conducting rod is connected with the thermal deformation mechanism, the thermal deformation mechanism is provided with a contact, a gap is formed between the contact and the conductive rod, the contact is electrically connected with the high-voltage direct-current power supply, the conducting rod is electrically connected with the semiconductor refrigerating piece, and the semiconductor refrigerating piece is electrically connected with the high-voltage direct-current power supply through a conducting wire.

9. The shielding apparatus of claim 8, wherein a ventilation opening is formed on a sidewall of the moving member, and the semiconductor chilling plate is disposed outside the ventilation opening.

10. The shielding apparatus of a cable oscillatory wave partial discharge detection system according to claim 1, further comprising an antenna, wherein a first antenna outlet is provided on another sidewall of the moving member, a second antenna outlet corresponding to the first antenna outlet is provided on the outer housing, and the antenna sequentially passes through the first antenna outlet and the second antenna outlet and then is connected to the control terminal.

Technical Field

The invention relates to the technical field of oscillatory wave detection, in particular to a shielding device of a cable oscillatory wave partial discharge detection system.

Background

The oscillation wave partial discharge detection system is subjected to electromagnetic interference from the outside of the system and the inside of the system in actual use. According to the cause of electromagnetic interference, natural interference and artificial interference can be classified. In the natural electromagnetic environment, static electricity, lightning, and natural radiation are the three most important sources of electromagnetic interference. The artificial interference source comprises clutter generated by corona of the power transmission line, circuit clutter, the clutter of the contactor and the like. In order to improve the electromagnetic compatibility of the oscillatory wave system and ensure the normal operation of the oscillatory wave system, the oscillatory wave partial discharge detection system is subjected to electromagnetic shielding.

Disclosure of Invention

The invention aims to provide a shielding device of a cable oscillatory wave partial discharge detection system, which aims to solve the problem that the cable oscillatory wave partial discharge detection system in the prior art is easy to be interfered by electromagnetic waves.

The invention is realized by the following technical scheme: the shielding device comprises an outer shell with an opening at one end, wherein a moving part is arranged in an inner cavity of the outer shell, the moving part is detachably connected with the moving part, a first shielding plate, a second shielding plate, a third shielding plate and a fourth shielding plate are arranged inside the moving part, the first shielding plate, the second shielding plate, the third shielding plate and the fourth shielding plate divide the inside of the moving part into a first space, a second space, a third space, a fourth space and a fifth space, an inductor and a cable connecting device are arranged in the first space, a high-voltage direct-current power supply and a high-voltage switch connected with the high-voltage direct-current power supply in parallel are arranged in the second space, an impedance unit is arranged in the third space, a coupling unit is arranged in the fourth space, a control terminal is arranged in the fifth space, the high-voltage direct-current power supply and the inductor are connected with the high-voltage direct-current power supply, The cable connecting device is electrically connected in sequence, the cable connecting device is electrically connected with the impedance unit and the coupling unit respectively, and the impedance unit and the coupling unit are electrically connected with the control terminal.

Preferably, a fixed cylinder is arranged at the bottom of the inner cavity of the outer shell, a driving motor, a connecting shaft, a worm and a first storage battery are arranged in the fixed cylinder, the output end of the driving motor is connected with one end of the connecting shaft, one end of the connecting shaft is connected with the inner wall of the fixed cylinder in a rotating mode, the worm is sleeved on the connecting shaft, a worm nut strip is arranged at the bottom of the moving part, the worm is meshed with the worm nut strip, and the first storage battery supplies power to the driving motor.

Preferably, the bottom of the moving piece is provided with a roller, and the roller is arranged on one side of the terminal point of the worm mother strip.

Preferably, be equipped with the cable interface on the moving member lateral wall, cable connecting device with the cable interface is linked together, cable connecting device includes connecting rod, barrel, second battery, control mechanism, the barrel passes through the connecting rod with first shield plate is fixed to be linked to each other, the opening of barrel with the cable interface is linked together, inside electric connection portion and the cable clamping device of being equipped with of barrel, be equipped with conducting rod and contact switch on the tip of electric connection portion, contact switch with the control mechanism electrical property links to each other, the second battery does the cable clamping device supplies power, control mechanism with the cable clamping device electrical property links to each other.

Preferably, the cable clamping device is symmetrically fixed on the inner wall of the cylinder body and comprises an electromagnet, a spring, a magnetic rod and a clamping jaw, the electromagnet is fixedly connected with the spring, the magnetic rod and the clamping jaw in sequence, the second storage battery supplies power to the electromagnet, and the control mechanism is used for switching on/off the power supply to the electromagnet.

Preferably, the output end of the inductor is electrically connected with the electrical connection portion, and the output end of the electrical connection portion is electrically connected with the impedance unit and the coupling unit through wires respectively.

Preferably, the shielding device further comprises a first connecting conduit, a second connecting conduit, a third connecting conduit, a fourth connecting conduit and a fifth connecting conduit, wherein the first shielding plate and the second shielding plate are respectively communicated through the first connecting conduit and the second conduit;

the electric connection part and the lead of the impedance unit pass through the first connecting conduit;

the lead of the electric connection part and the coupling unit passes through the second connecting conduit;

the high-voltage direct-current power supply and the lead of the inductor penetrate through the third connecting guide pipe;

the impedance unit and the lead of the control terminal pass through the fourth connecting conduit;

the lead of the coupling unit and the control terminal passes through the fifth connecting conduit.

Preferably, be equipped with wave filter and heat dissipation mechanism in the first space, the output of high voltage direct current power supply with the wave filter links to each other, the output of wave filter with the inductance passes through the wire electrical property and links to each other, heat dissipation mechanism includes heat conduction pole, heat deformation mechanism, semiconductor refrigeration piece, conducting rod, the heat conduction pole set up in around the high voltage direct current power supply, the tip of heat conduction pole with heat deformation mechanism links to each other, be equipped with the contact on the heat deformation mechanism, the contact with there is the clearance between the conducting rod, the contact with the high voltage direct current power supply electrical property links to each other, the conducting rod with semiconductor refrigeration piece electrical property links to each other, the semiconductor refrigeration piece pass through the wire with the high voltage direct current.

Preferably, a vent is arranged on the side wall of the moving member, and the semiconductor refrigeration piece is arranged outside the vent.

Preferably, the mobile part further comprises an antenna, a first antenna outlet is formed in the other side wall of the mobile part, a second antenna outlet corresponding to the first antenna outlet is formed in the outer shell, and the antenna sequentially penetrates through the first antenna outlet and the second antenna outlet and then is connected with the control terminal.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a shielding device of a cable oscillatory wave partial discharge detection system, wherein a moving part is arranged in an outer shell, so as to effectively filter external interference signals, in order to further improve the shielding capability of the moving part, a first shielding plate, a second shielding plate, a third shielding plate and a fourth shielding plate are respectively arranged in the moving part, the first shielding plate, the second shielding plate, the third shielding plate and the fourth shielding plate are also made of materials for shielding electromagnetic waves, the internal space of the moving part is divided into a first space, a second space, a third space, a fourth space and a fifth space by the first shielding plate, the second shielding plate, the third shielding plate and the fourth shielding plate, an inductor and a cable connecting device are arranged in the first space, a high-voltage direct current power supply and a high-voltage switch connected with the high-voltage direct current power supply in parallel are arranged in the second space, the high-voltage direct-current power supply is electrically connected with the inductor and the cable connecting device in sequence, the cable connecting device is electrically connected with the impedance unit and the coupling unit respectively, the impedance unit and the coupling unit are electrically connected with the control terminal, all the elements are isolated from each other in space through the connection and placement modes, internal interference electromagnetic waves are avoided, the oscillation wave partial discharge test circuit can be formed on the circuit, meanwhile, the outer shell and the moving element can effectively avoid interference of external interference electromagnetic waves on the oscillation wave partial discharge test circuit, and accordingly the test precision of cable oscillation wave discharge is effectively improved.

Drawings

In order to more clearly illustrate the technical solutions in 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 preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a structural diagram of a shielding device of a cable oscillatory wave partial discharge detection system according to embodiment 1 of the present invention;

fig. 2 is a schematic view of a cable connection structure provided in embodiment 1 of the present invention;

fig. 3 is a schematic diagram of an oscillatory wave partial discharge test circuit according to embodiment 1 of the present invention;

fig. 4 is a signal connection diagram of a cable clamping device provided in embodiment 1 of the present invention;

fig. 5 is a structural diagram of a shielding device of a cable oscillatory wave partial discharge detection system according to embodiment 2 of the present invention;

fig. 6 is a structural diagram of a shielding device of a cable oscillatory wave partial discharge detection system according to embodiment 3 of the present invention;

fig. 7 is a schematic diagram of an oscillatory wave partial discharge test circuit according to embodiment 3 of the present invention.

In the figure, 1 an outer shell, 2 a moving part, 3 a first shielding plate, 4 a second shielding plate, 5 a third shielding plate, 6 a fourth shielding plate, 7 a first space, 8 a second space, 9a third space, 10 a fourth space, 11 a fifth space, 12 a high-voltage direct-current power supply, 13 an inductor, 14 a high-voltage switch, 15 an impedance unit, 16 a coupling unit, 17 a control terminal, 18 a cable interface, 19 a connecting rod, 20 a cylinder body, 21 a conductive rod, 22 a contact switch, 23 an electromagnet, 24 a spring, 25 a clamping jaw, 25 a first connecting conduit, 26 a second connecting conduit, 27 a third connecting conduit, 28 a fourth connecting conduit, 29 a fifth connecting conduit, 30 an antenna, 31 a first antenna outlet, 32 a second antenna outlet, 33 a fixed cylinder, 34 a driving motor, 35 a connecting shaft, a worm 36, 37 a worm bar, 38 a heat conducting rod, 39a thermal bimetallic strip, 39a active layer, 39b passive layer, 40 contact, 41 conductive rods, 42 semiconductor refrigeration sheets, 43 ventilation openings, 44 fins, 45 first storage batteries, 46 second storage batteries, 47 control mechanisms, 48 rollers, 49 electric connection parts, 50 magnetic rods and 51 filters.

Detailed Description

In order to better understand the technical content of the invention, specific embodiments are provided below, and the invention is further described with reference to the accompanying drawings.