CN112577646A - Mutual inductor wiring forgetting-prevention alarm device - Google Patents

Mutual inductor wiring forgetting-prevention alarm device Download PDF

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Publication number
CN112577646A
CN112577646A CN202011132205.7A CN202011132205A CN112577646A CN 112577646 A CN112577646 A CN 112577646A CN 202011132205 A CN202011132205 A CN 202011132205A CN 112577646 A CN112577646 A CN 112577646A
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CN
China
Prior art keywords
mutual inductor
wear
forgetting
insulated wire
alarm device
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011132205.7A
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Chinese (zh)
Inventor
吴定亮
龙翱翔
孙承祥
王帅
杨茶
方曦
吴定芳
石磊
兰宪杰
安锌
杨慢
赵辉
王龙
郑文
颜世强
邓华
张旭
沈正康
杨小军
王志甫
赵胜
谢菲
杨锴
刘佳
杨昌碑
李姜娴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guizhou Power Grid Co Ltd
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Guizhou Power Grid Co Ltd
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Publication date
Application filed by Guizhou Power Grid Co Ltd filed Critical Guizhou Power Grid Co Ltd
Priority to CN202011132205.7A priority Critical patent/CN112577646A/en
Publication of CN112577646A publication Critical patent/CN112577646A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00Measuring force or stress, in general
    • G01L1/20Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028Force sensors associated with force applying means

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

The invention discloses a mutual inductor wiring forgetting-prevention alarm device, when a box door is closed after the wiring is forgotten and recovered manually, an insulated wire can block the box door, a pressure sensor in the wire can be extruded, a signal is transmitted to an alarm unit, so that an alarm sound is given, and the box door of a mutual inductor wiring box can not be closed due to the obstruction of a wear-resistant insulated wire, so that the reminding function is easily realized, and the safety problem that a tester forgets to recover the wiring easily after the test of undoing the related wiring in the mutual inductor wiring box, and even burns out the mutual inductor in serious cases is solved.

Description

Mutual inductor wiring forgetting-prevention alarm device
Technical Field
The invention relates to the field of auxiliary tools for power equipment tests, in particular to a mutual inductor wiring forgetting-prevention alarm device.
Background
In a dielectric loss test and an insulation resistance test of the transformer, in order to improve accuracy of detection data and guarantee personal safety, a low-voltage N end (a capacitor voltage transformer), a tail screen (a capacitor current transformer) and a secondary winding leading-out wire of a capacitor screen in a junction box need to be disconnected. After the mutual inductor is tested, the previous wiring state must be recovered, but due to the fact that the wiring volume in the wiring box is small, the mind of operators is not good, and due to the fact that a plurality of tested objects exist, the situation that the wiring box is forgotten to be recovered and is closed is prone to being caused. After the mutual inductor is put into operation, high voltage is generated at the position where the mutual inductor is not connected, suspension discharge is formed on the peripheral epoxy resin insulation and terminals, insulation breakdown and oil leakage of the mutual inductor are caused, and finally the mutual inductor is burnt out, so that not only is great economic loss generated, but also the life safety of daily patrol personnel is influenced.
Disclosure of Invention
In view of the above, the invention aims to provide a mutual inductor wiring forgetting prevention alarm device. The problem that testing personnel forget to restore the wiring easily after related wiring in the transformer wiring box is untied and tested, and the transformer is burnt down in serious conditions can be solved.
The purpose of the invention is realized by the following technical scheme:
the mutual inductor wiring forgetting-prevention alarm device comprises an alarm unit, a wear-resistant insulated wire and an insulating clamp, wherein one end of the wear-resistant insulated wire is connected with the insulating clamp;
the pressure sensors are arranged inside the wear-resistant insulated wire, when any point on the surface of the wear-resistant insulated wire is extruded by external force, the pressure sensors can send out electric signals to the alarm unit, and the alarm unit sends out alarm signals;
the insulating clamp is used for being connected with internal devices of the mutual inductor.
In particular, the alarm signal includes a sound signal, a flashing signal and other alert signals that can draw the attention of the operator.
Particularly, the transformer further comprises an external fixing unit, wherein the external fixing unit is connected with one end, which is not connected with the insulating clamp, of the wear-resistant insulating wire, and is used for fixing one end of the wear-resistant insulating wire to the external space of the transformer.
In particular, the alarm unit is provided integrally with the external fixation unit.
Particularly, the external fixing unit is fixed to an external space of the transformer in a magnet adsorption, adhesion adsorption or mechanical fixing manner.
In particular, the external fixing unit employs a flying ring magnet.
In particular, the pressure sensors are arranged inside the wear-resistant insulated wire in a serial connection mode.
In particular, the outer surface of the external fixation unit is provided with a conspicuous marking layer.
The invention has the beneficial effects that: the insulating clamp is used for clamping an N-end outgoing line, a tail screen grounding line, a secondary winding outgoing line or other parts in a box, the wear-resistant insulating line is used for connecting a magnet and the insulating clamp, when the connection is forgotten to be recovered and the box door is closed, the insulating line can clamp the box door, a pressure sensor in the line can be squeezed, signals are transmitted to a sound alarm device at the magnet, and therefore an alarm sound is given out, and the box door of the mutual inductor junction box cannot be closed due to the obstruction of the wear-resistant insulating line. The sound alarm device can also send out alarm sound, easily realizes reminding the function to solved the tester and tested the back in the relevant wiring of untiing the mutual-inductor terminal box, forgotten easily and resume the wiring, can cause the problem that the mutual-inductor burns out when serious.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the present invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic diagram illustrating the use of one embodiment;
FIG. 3 is a schematic diagram of a second embodiment;
fig. 4 is a schematic usage diagram of the third embodiment.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "length", "circumferential", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Furthermore, the terms "first", "second" and "first" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
As shown in fig. 1, the mutual inductor wiring forgetting-prevention alarm device comprises an alarm unit 1, a wear-resistant insulated wire 2 and an insulating clamp 3, wherein one end of the wear-resistant insulated wire is connected with the insulating clamp 3; the insulating clamp is used for being connected with internal devices of the mutual inductor.
The pressure sensor is arranged in the wear-resistant insulated wire 2, when any point on the surface of the wear-resistant insulated wire is extruded by external force, the pressure sensor can send an electric signal to the alarm unit, and the alarm unit sends an alarm signal; the alarm signal includes a sound signal, a flashing signal and other prompting signals which can draw the attention of the operator.
The transformer comprises a wear-resistant insulated wire and is characterized by further comprising an external fixing unit, wherein the external fixing unit is connected with one end, which is not connected with the insulated clamp, of the wear-resistant insulated wire, and the external fixing unit is used for fixing one end of the wear-resistant insulated wire in the external space of the transformer. The external fixing unit can be fixed in the external space of the mutual inductor by adopting a magnet adsorption, adhesion adsorption or mechanical fixing mode. In this embodiment, the external fixing unit adopts a lifting ring magnet and the alarm unit and the external fixing unit are integrated. Except the flying ring magnet, the flying ring magnet is made of insulating materials. The magnet has certain attraction force, can be adsorbed on the outer surface of the mutual inductor framework or the junction box to play a role in fixing, and the hanging ring can be conveniently taken down by an operator; the insulating clamp is used for clamping an N-end outgoing line, a tail screen grounding line, a secondary winding outgoing line or other parts in the box; wear-resisting insulated wire is used for connecting magnet and insulating clamp, and when artificial forget the recovery wiring, when closing the box door, it can block the box door, and the pressure sensor of inline can receive the extrusion, and the audible alarm device of magnet department will be transmitted to the signal to send alarm sound, and because of the hindrance of wear-resisting insulated wire, the box door of mutual-inductor terminal box also can't be closed.
The first embodiment is as follows:
the embodiment can solve the problem that the wires are forgotten to be recovered after the N end of the capacitor voltage transformer is disconnected, as shown in fig. 2, after the leading-out wire at the N end of the capacitor voltage transformer is disconnected, the leading-out wire at the N end is clamped by an insulating clamp in the transformer wiring anti-forgetting alarm device and is hung in the air to be pulled high so as to increase the distance from other terminals, so that the leading-out wire at the N end can be clamped by a pressurizing wire in a dielectric loss test more easily, and the safe distance can be kept between the pressurizing wire and the surrounding terminals. The hanging ring magnet is fixed on the framework of the junction box in an adsorption manner, so that sufficient tension is provided for the whole anti-forgetting device, and when a wire is forgotten to be doubled, the hanging ring magnet with a striking outside can also play an effective reminding role. Wear-resisting insulated wire is insulating material, can not cause any interference to the experiment, it is inside along entering into the terminal box through the box, when experimental end, forget and resume the wiring, when closing the box door, wear-resisting insulated wire can block the box door, pressure sensor in the line can receive the extrusion, the audible alarm device of rings magnet department will be transmitted to the signal, thereby send out alarm sound, and because of the hindrance of wear-resisting insulated wire, the box door also can't be closed, the light warning function that realizes, thereby solved behind the capacitive voltage transformer N end line of separating, forget the problem of line.
The second embodiment is as follows:
the embodiment can solve the problem that the line is forgotten to be duplicated after the end screen of the capacitive current transformer is disconnected, as shown in fig. 3, after the end screen grounding wire of the capacitive current transformer is disconnected, the end screen grounding wire is clamped by an insulating clamp in the transformer wiring forgetting prevention alarm device, the flying ring magnet is adsorbed on a framework on the right side of the junction box, the wear-resistant insulating wire is connected with the inner insulating clamp and the outer magnet of the box, when the test is finished, the wire is forgotten to be recovered, when the box door is closed, the box door can be clamped, the box door cannot be closed, the sound alarm device on the flying ring magnet can give an alarm, and the forgetting prevention function is easily realized, so that the problem that the line is forgotten to be duplicated after the end screen of the capacitive current transformer is disconnected is solved, in addition, the contact between the end screen grounding wire and other terminals.
The third concrete embodiment:
this embodiment can solve after mutual-inductor secondary winding separates the line, forget the problem of line, as shown in fig. 4, after untiing the secondary winding lead-out wire of mutual-inductor, fix the secondary winding lead-out wire with the insulating clamp among the mutual-inductor wiring anti-forgetting alarm device or clip other positions in the box, rings magnet adsorbs at the terminal box surface, after the experiment, forget and resume the wiring, when closing the box door, wear-resisting insulated wire can block the box door, make the box door unable close, easily realize the function of preventing forgetting, and rings the audible alarm device on the magnet can send the warning, thereby solved after mutual-inductor secondary winding separates the line, the problem of forgetting the line.
As for the arrangement mode of the pressure sensors in the wear-resistant insulated wire, the mode that the pressure sensors are sequentially arranged in series in the wear-resistant insulated wire can be adopted, each pressure sensor is located at one section of the wear-resistant insulated wire, the signal output end of each pressure sensor is connected to the alarm unit, and when the pressure sensors on any section are extruded by external force, an electric signal for alarming can be sent to the alarm unit.
Of course, it is also possible to use a special pressure sensor, in which the matrix material capable of generating piezoresistive effect is uniformly arranged along the length of the wear-resistant insulated wire, and when some matrix material is deformed due to being squeezed by external force, a certain signal capable of being output is generated through an internal circuit, for example, a resistance strain gauge is one of the main components of the piezoresistive strain sensor. The working principle of the metal resistance strain gauge is that the resistance value of a strain resistor adsorbed on a base material changes along with mechanical deformation, and the strain gauge is commonly called as resistance strain effect. The ceramic pressure sensor is based on piezoresistive effect, pressure directly acts on the front surface of the ceramic diaphragm to make the diaphragm generate tiny deformation, the thick film resistor is printed on the back surface of the ceramic diaphragm to be connected into a Wheatstone bridge, the bridge generates a voltage signal which is in direct proportion to the pressure, highly linear and excitation voltage due to the piezoresistive effect of the piezoresistor, and the standard signal is calibrated to be 2.0/3.0/3.3mV/V and the like according to different pressure measuring ranges.
As a further improvement, the outer surface of the external fixation unit is provided with a conspicuous marking layer. If the flying ring magnet is coated with a red coating layer, a certain warning effect is achieved, and the operation is convenient.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.

Claims (8)

1. The utility model provides a mutual-inductor wiring prevents forgetting alarm device which characterized in that: the device comprises an alarm unit, a wear-resistant insulated wire and an insulating clamp, wherein one end of the wear-resistant insulated wire is connected with the insulating clamp;
the pressure sensors are arranged inside the wear-resistant insulated wire, when any point on the surface of the wear-resistant insulated wire is extruded by external force, the pressure sensors can send out electric signals to the alarm unit, and the alarm unit sends out alarm signals;
the insulating clamp is used for being connected with internal devices of the mutual inductor.
2. The mutual inductor wiring forgetting-prevention alarm device according to claim 1, characterized in that: the alarm signal comprises a sound signal, a flashing signal and other prompting signals which can draw the attention of the operator.
3. The mutual inductor wiring forgetting-prevention alarm device as claimed in claim 1 or 2, wherein: the transformer comprises a wear-resistant insulated wire and is characterized by further comprising an external fixing unit, wherein the external fixing unit is connected with one end, which is not connected with the insulated clamp, of the wear-resistant insulated wire, and the external fixing unit is used for fixing one end of the wear-resistant insulated wire in the external space of the transformer.
4. The mutual inductor wiring forgetting-prevention alarm device according to claim 3, characterized in that: the alarm unit and the external fixing unit are arranged into a whole.
5. The mutual inductor wiring forgetting-prevention alarm device according to claim 4, characterized in that: the external fixing unit is fixed in the external space of the mutual inductor in a magnet adsorption, adhesion adsorption or mechanical fixing mode.
6. The mutual inductor wiring forgetting-prevention alarm device according to claim 5, characterized in that: the external fixing unit adopts a lifting ring magnet.
7. The mutual inductor wiring forgetting-prevention alarm device according to claim 1, characterized in that: the pressure sensors are arranged inside the wear-resistant insulated wire in a serial connection mode in sequence.
8. The mutual inductor wiring forgetting-prevention alarm device according to claim 1, characterized in that: the outer surface of the external fixing unit is provided with a striking mark layer.
CN202011132205.7A 2020-10-21 2020-10-21 Mutual inductor wiring forgetting-prevention alarm device Pending CN112577646A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011132205.7A CN112577646A (en) 2020-10-21 2020-10-21 Mutual inductor wiring forgetting-prevention alarm device

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Application Number Priority Date Filing Date Title
CN202011132205.7A CN112577646A (en) 2020-10-21 2020-10-21 Mutual inductor wiring forgetting-prevention alarm device

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CN112577646A true CN112577646A (en) 2021-03-30

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CN202011132205.7A Pending CN112577646A (en) 2020-10-21 2020-10-21 Mutual inductor wiring forgetting-prevention alarm device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113109597A (en) * 2021-05-12 2021-07-13 广东电网有限责任公司 Automatic 10kV circuit breaker short-circuit connection device for alternating-current voltage withstand test of reporting to police

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2519927Y (en) * 2001-11-13 2002-11-06 联想(北京)有限公司 Loss prevention device for computer mouse and keyboard
CN201708461U (en) * 2010-05-22 2011-01-12 伊川县电业局 Short connected wire forgetting prevention device
CN103776567A (en) * 2012-10-19 2014-05-07 纳米新能源(唐山)有限责任公司 Pressure sensing cable based on frictional electricity
CN207039075U (en) * 2017-07-05 2018-02-23 天津市亨源电力工程有限公司 A kind of turnbuckle with pressure alarm function

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2519927Y (en) * 2001-11-13 2002-11-06 联想(北京)有限公司 Loss prevention device for computer mouse and keyboard
CN201708461U (en) * 2010-05-22 2011-01-12 伊川县电业局 Short connected wire forgetting prevention device
CN103776567A (en) * 2012-10-19 2014-05-07 纳米新能源(唐山)有限责任公司 Pressure sensing cable based on frictional electricity
CN207039075U (en) * 2017-07-05 2018-02-23 天津市亨源电力工程有限公司 A kind of turnbuckle with pressure alarm function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113109597A (en) * 2021-05-12 2021-07-13 广东电网有限责任公司 Automatic 10kV circuit breaker short-circuit connection device for alternating-current voltage withstand test of reporting to police

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Application publication date: 20210330