CN210894641U - Electric leakage detection device for surface of electric equipment shell - Google Patents
Electric leakage detection device for surface of electric equipment shell Download PDFInfo
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- CN210894641U CN210894641U CN201921787009.6U CN201921787009U CN210894641U CN 210894641 U CN210894641 U CN 210894641U CN 201921787009 U CN201921787009 U CN 201921787009U CN 210894641 U CN210894641 U CN 210894641U
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Abstract
The utility model provides a to electric leakage detection device for consumer housing surface, belongs to electric leakage detection technical field. Including consumer (1), its characterized in that: the power collection device is provided with a power collection cover, the power collection cover comprises a watchcase power collection cover (2) on the surface of the shell of the electric equipment (1) and a corner power collection cover (6) at the corner of the electric equipment (1), and a plurality of power absorption pins (5) are arranged on the inner surface of the power collection cover; the meter shell is further provided with a lead (3), one end of the lead (3) is connected to the outer surfaces of the meter shell current collecting cover (2) and the corner current collecting cover (6) respectively, and the other end of the lead (3) is connected with the detection mechanism (4) in series after being output from the meter shell current collecting cover (2) and the corner current collecting cover (6) and then is grounded. In this electric leakage detection device to consumer shell surface, through setting up watchcase current collection cover and turning current collection cover, can carry out charge detection to consumer's surface and corner, can effectively detect consumer's the electric leakage condition, eliminated the potential safety hazard.
Description
Technical Field
The utility model provides a to electric leakage detection device for consumer housing surface, belongs to electric leakage detection technical field.
Background
The electric equipment is because of reasons such as poor ground connection or other trouble in the use, the equipment probably has the electric leakage condition, a large amount of electric charges can gather on the equipment shell after the equipment takes place the electric leakage, especially sharp-pointed department and the corner on shell surface, because the equipment takes place the electric leakage after, its position of discharging is difficult to be perceived, consequently receive the electric shock when the human body is close to equipment easily, and when having combustible gas around the electric equipment, combustible gas burns easily under the effect of electric charge and even takes place the explosion, there is great potential safety hazard, consequently, design one kind and can detect the electric leakage condition of electric equipment, so that the scheme that in time eliminates the potential safety hazard becomes the problem that waits to solve in this field.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: overcome prior art's not enough, provide one kind through setting up watchcase current collection cover and turning current collection cover, can carry out charge detection to the surface of consumer and corner, can effectively detect the electric leakage condition of consumer, eliminated the electric leakage detection device to consumer shell surface of potential safety hazard.
The utility model provides a technical scheme that its technical problem adopted is: this electric leakage detection device to be directed at consumer shell surface, including consumer, its characterized in that: the power collection cover comprises a meter shell power collection cover fixed on the surface of a shell of the electric equipment and a corner power collection cover fixed at the corner of the electric equipment, and a plurality of electricity suction needles are arranged on the inner surface of the power collection cover; the lead is simultaneously connected with the electricity suction needles in the watch case electricity collection cover and the corner electricity collection cover to lead out leakage current received by the electricity suction needles in the watch case electricity collection cover and the corner electricity collection cover;
the electricity-absorbing needle is positioned on the inner surfaces of the watch case electricity-collecting cover and the corner electricity-collecting cover, the needle point of the electricity-absorbing needle positioned in the watch case electricity-collecting cover is over against the surface of the shell of the electric equipment, and the needle point of the electricity-absorbing needle positioned in the corner electricity-collecting cover is over against the corner of the electric equipment.
Preferably, the other end of the lead is connected to the detection mechanism after being output from the case current collecting cover and the corner current collecting cover.
Preferably, the watch case current collecting cover is a flat plate-shaped cover body, the watch case current collecting cover is provided with an opening end facing the shell of the electric equipment, and the edge of the opening end is tightly attached and fixed with the shell of the electric equipment.
Preferably, an insulating pad is arranged on a fixing surface of the watch case current collecting cover and the electric equipment shell.
Preferably, the corner current collecting cover is a rectangular pyramid-shaped cover body and comprises three plate surfaces, any two adjacent plate surfaces in the three plate surfaces are perpendicular to each other and are butted at the edges of the two adjacent plate surfaces.
Preferably, an insulating pad is arranged between the corner current collecting cover and an end face at the corner of the electric equipment.
Preferably, a detection circuit is arranged in the detection mechanism, the detection circuit comprises a current transformer, a lead is connected with a primary side of the current transformer, a secondary side of the current transformer is connected with an input end of a microprocessor, and an output end of the microprocessor is connected with an alarm.
Compared with the prior art, the utility model discloses the beneficial effect who has is:
in this electric leakage detection device to consumer shell surface, through setting up watchcase current collection cover and turning current collection cover, can carry out charge detection to consumer's surface and corner, can effectively detect consumer's the electric leakage condition, eliminated the potential safety hazard.
The electric leakage detection device for the surface of the electric equipment shell can also be applied to equipment such as an iron tower and a power distribution cabinet, and is good in applicability.
In power transmission and transformation system, can produce the signal of telecommunication between zero line and earth connection when zero line and earth connection short circuit, the technical scheme of this application can connect between power transmission and transformation system's zero line and earth connection equally, detects the short circuit between zero line and the earth connection.
Drawings
Fig. 1 is a schematic structural diagram of a leakage detecting device for a surface of a housing of an electric device.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is an enlarged view of fig. 1 at B.
Fig. 4 is an enlarged view of fig. 1 at C.
FIG. 5 is a schematic circuit diagram of the detecting mechanism of embodiment 1.
FIG. 6 is a schematic circuit diagram of a detecting mechanism according to embodiment 2.
FIG. 7 is a schematic structural diagram of example 3.
FIG. 8 is a schematic structural view of example 4.
FIG. 9 is a schematic structural view of example 7.
Wherein: 1. the device comprises an electric device 2, a watch case current collecting cover 3, a lead 4, a detection mechanism 5, a suction needle 6, a corner current collecting cover 7, an insulating pad 8, a discharge box 9, a discharge needle 10, an optical fiber 11, a discharge cavity 12 and a trigger box.
Detailed Description
Fig. 1 to 5 are preferred embodiments of the present invention, and the present invention will be further explained with reference to fig. 1 to 9.
Example 1:
as shown in FIG. 1, an electric leakage detecting device for the surface of the housing of an electric device comprises a case current collecting cover 2 fixed at the outer end face of the housing of the electric device 1 and a corner current collecting cover 6 fixed at the corner of the housing, wherein the case current collecting cover 2 and the corner current collecting cover 6 are both made of metal, a lead 3 is connected with the case current collecting cover 2 and the corner current collecting cover 6 at the same time, and the other end of the lead 3 is grounded through a detecting mechanism 4. If the electric leakage condition occurs in the electric equipment 1, the electric charges are collected on the surface of the shell and collected by the shell current collection cover 2 or/and the corner current collection cover 6, in the embodiment, a detection circuit is arranged in the detection mechanism 4, the pulse current formed by discharging is converted into induction voltage through the detection circuit in the detection mechanism 4, the induction voltage is judged by the microprocessor, and when the amplitude of the induction voltage reaches a certain value, the microprocessor drives an alarm (not shown in the figure) to give an alarm.
Referring to fig. 2 to 3, the case current collecting cover 2 is a flat plate-shaped cover, and the case current collecting cover 2 may be formed in various shapes such as a circle and a rectangle. The watch case current collecting cover 2 is provided with an opening end, the opening end faces the outer shell of the electric equipment 1, and the edge of the opening end is tightly attached and fixed with the outer shell of the electric equipment 1. At the edge of the open end an insulating mat 7 is arranged, which insulating mat 7 is preferably made of an elastic insulating material, such as rubber. An adhesive may be provided at both ends of the insulating mat 7 to fix the case current-collecting cap 2 to the case surface by adhesion. The watch case current collecting cover 2 can also be fixed on the surface of the shell through a fixing bolt, and the fixing bolt penetrates through the watch case current collecting cover 2 and the insulating pad 7 and then is screwed into the shell to realize fixation.
The inner wall of the watch case collecting hood 2 is provided with a plurality of electricity sucking needles 5, and the needlepoints of the electricity sucking needles 5 are arranged at intervals with the case of the electric equipment 1. The above-mentioned lead wire 3 is fixed on the outer end face of the case collecting cap 2, and therefore, the electric charge collected by the suction pin 5 can be transferred into the lead wire 3. The needlepoint of the electricity suction needle 5 is infinitely close to the outer end face of the watch case electricity collection cover 2.
With reference to fig. 4, the corner current collecting cover 6 is a rectangular pyramid-shaped cover body, the corner current collecting cover 6 includes three triangular plate surfaces, and any two adjacent plate surfaces in the three triangular plate surfaces are perpendicular to each other and are butted at the edge of the two adjacent plate surfaces, so that after the corner current collecting cover 6 is placed at the corner of the housing, the three triangular plate surfaces of the corner current collecting cover 6 are respectively parallel to the three end surfaces at the corner of the housing. The needle tip of the aspiration needle 5 is infinitely close to the corner of the housing.
The edge of the triangular plate surface in the corner current collection cover 6 is bent inwards to form a fixed edge, and after the corner current collection cover 6 is placed at the corner of the shell, the fixed edges at the edge of the triangular plate surface are respectively attached to three end faces at the corner of the shell correspondingly. Insulating pads 7 are also arranged between the fixed edge at the edge of the triangular plate surface and the three end surfaces corresponding to the shell. The corner current-collecting cap 6 can be fixed at the corner of the case in the same manner as the case current-collecting cap 2.
A plurality of suction needles 5 are also arranged on the inner wall of the corner current collection cover 6, and the needle points of the suction needles 5 and three end surfaces at the corner of the shell are respectively arranged at intervals. The lead wire 3 described above is fixed on the outer end face of the corner current collecting cap 6, and therefore, the electric charge collected by the suction pin 5 can be transferred into the lead wire 3.
As shown in fig. 5, the detection circuit in the detection mechanism 4 includes a current sensor B1, the current sensor B1 is used to collect the leakage of the device under test, and M represents the mutual inductance between the primary loop and the secondary loop of the current sensor B1; the resistor R1 and the inductor L1 are the internal resistance and the self-inductance of the sensor coil; the capacitor C1 is represented as a stray capacitance and the resistor R2 is an integrating resistor. The high-frequency current sensor is made by winding a plurality of turns of conductive coils on a magnetic core material. When the discharge occurs, a high frequency pulse current (i (t) in fig. 3) is generated, and when the pulse current passes through the sensor, the induced alternating electromagnetic field generates an induced voltage on the coil (u (t) in fig. 3).
The generated induced voltage is subjected to analog-to-digital conversion through a conventional analog-to-digital conversion chip (not shown in the figure), and then is sent to a microprocessor (not shown in the figure), the microprocessor judges the induced voltage, when the amplitude of the induced voltage reaches a certain value, the microprocessor drives an alarm (not shown in the figure) to give an alarm, the microprocessor drives the alarm to give an alarm by adopting the known technology in the field, for example, the switching-on of a power supply loop of the alarm is realized by switching on a trigger triode, or the switching-on of the power supply loop of the alarm is realized by driving a relay to act, and the microprocessor can be realized by adopting a commercially available common singlechip.
The specific working process and principle are as follows:
in this embodiment, if the electrical device 1 has an electrical leakage condition, the charges are collected on the surface of the casing and gradually collected on the surface of the casing, the electricity is collected by discharging the electricity through the casing current collecting cover 2 arranged on the surface of the casing and the electricity sucking pin 5 arranged in the corner current collecting cover 6 arranged at the corner of the casing, the received charges are led into the detecting mechanism 4 through the lead 3 by the electricity sucking pin 5, the pulse current formed by the discharge is converted into an induced voltage through the current sensor in the detecting mechanism 4, the induced voltage is judged by the microprocessor, and when the amplitude of the induced voltage reaches a certain value, the microprocessor drives an alarm (not shown in the figure) to give an alarm.
Example 2:
this example differs from example 1 in that: the detection circuit for detecting the electrical leakage in the mechanism 4 is different, as shown in fig. 6, i (t) represents a partial discharge pulse current signal flowing through the metal shielding layer, the inductance L2 represents a lumped inductance along the grounding line of the shielding layer, the capacitance C2 represents a space capacitance of the sensor, and the capacitance C3 represents a lumped capacitance of the coaxial signal cable. Due to the high-resistance and low-pass effect of the inductor L2 on the pulse signal, high-frequency components in I (t) mainly flow to a series branch of C2 and C3, voltage drop is generated in the branch, and capacitors C2-C3 form a capacitor voltage divider structure, so that the pulse voltage signal can be acquired from two ends of a capacitor C3, and the discharge signal can be measured.
Example 3:
this example differs from example 1 in that: as shown in fig. 7, in the present embodiment, the corner current collecting hood 6 is placed inside the housing of the electric device 1, and the electric leakage detection is performed with respect to the corner of the inner surface of the housing.
Example 4:
this example differs from example 1 in that: as shown in fig. 8, in the present embodiment, only one suction pin 5 is disposed in the corner current collecting hood 6, in the present embodiment, the corner current collecting hood 6 may be made of an insulating material, and the suction pin 5 is directly connected to the lead 3 after passing through the corner current collecting hood 6.
Example 5:
this example differs from example 1 in that: in this embodiment, the suction needle 5 is provided with at least one, and the suction needle 5 is fixed by a support made of an insulating material and is located at a corner of the housing.
Example 6:
this example differs from example 1 in that: a polar plate is arranged outside the watch case current collecting cover 2, a capacitor is formed between the polar plate and the surface of the watch case current collecting cover 2, and the detection of electric leakage is realized by measuring the capacitance.
Example 7:
this example differs from example 1 in that: in the embodiment, the detection of the leakage current is realized by using the optical signal generated by the point discharge, and in the embodiment, the electricity suction needle 5 is directly contacted with the electric equipment shell to lead out the leakage current.
As shown in fig. 9, the detection mechanism 4 includes a discharge box 8 and a trigger box 12. A plurality of independent discharge cavities 11 are formed in the discharge box 8 at intervals, two discharge needles 9 are fixed in each discharge cavity 11, the two discharge needles 9 enter from two sides of the discharge cavity 11 respectively, the tips of the two discharge needles 9 are arranged in the discharge cavity 11 oppositely, and discharge gaps are formed between the tips of the two discharge needles 9 at intervals. Two groups of discharge needles 9 which are arranged from two sides of the discharge cavity 11 are respectively connected to one position, wherein one group is connected with the lead 3, and the other group is grounded.
An optical fiber 10 is arranged in each discharge cavity 11, and the optical fiber 10 is opposite to the discharge gap between the discharge needles 9. A trigger box 12 is arranged outside the discharge box 8, a light trigger circuit is arranged in the trigger box 12, and the optical fiber 10 is led out from the discharge cavity 11 and then is connected into the trigger box 12 and is opposite to the light trigger circuit in the trigger box 12. The optical fiber 10 may be implemented by a commercially available glass optical fiber or a plastic optical fiber.
In this embodiment, the optical trigger circuit in the trigger box 12 is implemented by a phototransistor, the collector of the phototransistor is connected to the power Vcc and the output terminal OUT, the output terminal OUT is connected to the input terminal of an external microprocessor (not shown), the emitter of the phototransistor is grounded, and all the optical fibers 10 face the optical receiving terminal of the phototransistor. When the optical fiber 10 does not send OUT an optical signal, the phototriode is cut off, and after the optical fiber 10 sends OUT the optical signal, the phototriode is conducted, so that the level of the signal sent OUT by the OUT-phase microprocessor at the output end is changed, and the microprocessor drives the audible and visual alarm device to give an alarm according to the change of different levels.
Particular mention should be made here of: the microprocessor directly drives the bulb or/and the buzzer to perform sound and light alarm according to the level change of the input end of the microprocessor, or indirectly drives the bulb or/and the buzzer to perform sound and light alarm through the driving relay, belongs to the common knowledge in the field and the conventional means of the ordinary skilled person in the field, and is not required to be realized by a specific software program.
The specific working process and working principle are as follows:
when the electric equipment leaks electricity, the leakage current received by the discharging box 8 enters the discharging cavity 11 through the lead 3 and the discharging needle 9. The point discharge phenomenon can occur between the discharge gaps after the discharge charges enter the discharge cavities 11, electro-light can be generated after the point discharge phenomenon occurs, and the discharge boxes 8 are made of opaque materials, so that the interior of each discharge cavity 11 is a dark environment, and after the electro-light occurs in the discharge cavities 11 due to discharge, the optical fibers 10 facing the discharge gaps can transmit optical signals to the trigger boxes 12 and trigger the internal optical trigger circuits.
After the optical circuit is triggered, a level signal at the input end of an external controller (microprocessor) changes, and the microprocessor drives an audible and visual alarm device to give an alarm to indicate that equipment leaks electricity, so that staff can perform people's investigation.
Example 8:
this example differs from example 7 in that: in the present embodiment, the detection of the leakage current is realized by using the sound signal generated by the point discharge, and the optical fiber 10 is removed in the discharge chamber 11, and the trigger box 12 and the optical trigger circuit therein are removed at the same time. An acoustic sensor is placed in the discharge cavity 11, and a signal wire of the acoustic sensor is led out from the discharge cavity 11 and is connected with an external microprocessor. When the electric equipment generates sound due to point discharge, the sound sensor sends a signal to the microprocessor, and the microprocessor drives the alarm to give an alarm.
Example 9:
this example differs from example 7 in that: in the present embodiment, the detection of the leakage current is realized by using the sound signal generated by the point discharge, and the optical fiber 10 is removed in the discharge chamber 11, and the trigger box 12 and the optical trigger circuit therein are removed at the same time. A Hall sensor is placed in the discharge cavity 11, a signal wire of the Hall sensor is led out of the discharge cavity 11 and is connected with an external microprocessor. When the electric equipment discharges due to the point, the surrounding magnetic field changes, the Hall sensor sends a signal to the microprocessor, and the microprocessor drives the alarm to give an alarm.
Example 10:
this example differs from example 7 in that: in the embodiment, the temperature signal generated by the point discharge is used for realizing the detection of the electric leakage, the optical fiber 10 is removed in the discharge cavity 11, and the trigger box 12 and the optical trigger circuit therein are simultaneously removed. A temperature sensor is placed in the discharge cavity 11, and a signal wire of the temperature sensor is led out of the discharge cavity 11 and is connected with an external microprocessor. When the electric equipment discharges due to the point, the ambient temperature changes, the temperature sensor sends a signal to the microprocessor, and the microprocessor drives the alarm to give an alarm.
Example 11:
this example differs from example 1 in that: the tip of the electric suction needle 5 (discharge needle 9) in this embodiment may take other forms, such as a spherical surface, a circular tube end surface, a circular ring, a linear blade, a cross blade, a multi-edge blade, a cylindrical surface, an angular edge, and the like.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (7)
1. A leakage detection device for a surface of a housing of an electric device, comprising the electric device (1), characterized in that: the power collection device is provided with a power collection cover, the power collection cover comprises a meter shell power collection cover (2) fixed on the surface of a shell of the electric equipment (1) and a corner power collection cover (6) fixed at the corner of the electric equipment (1), and a plurality of power suction needles (5) are arranged on the inner surface of the power collection cover; the lead (3) is also arranged, and the lead (3) is simultaneously connected with the electricity-absorbing pins in the watch case electricity-collecting cover (2) and the corner electricity-collecting cover (6) to lead out leakage current received by the electricity-absorbing pins (5) in the watch case electricity-collecting cover (2) and the corner electricity-collecting cover (6);
the electricity-absorbing needle (5) is positioned on the inner surfaces of the meter case electricity-collecting cover (2) and the corner electricity-collecting cover (6), the needle point of the electricity-absorbing needle (5) positioned in the meter case electricity-collecting cover (2) is over against the surface of the shell of the electric equipment (1), and the needle point of the electricity-absorbing needle (5) positioned in the corner electricity-collecting cover (6) is over against the corner of the electric equipment (1).
2. A leakage detection device for a surface of a casing of an electric device according to claim 1, wherein: the other end of the lead (3) is connected with the detection mechanism (4) after being output from the watch case current collecting cover (2) and the corner current collecting cover (6).
3. A leakage detection device for a surface of a casing of an electric device according to claim 1, wherein: the watch case current collecting cover (2) is a flat cover body, the watch case current collecting cover (2) is provided with an opening end facing the shell of the electric equipment (1), and the edge of the opening end is tightly attached and fixed with the shell of the electric equipment (1).
4. A leakage detection device for a surface of a casing of an electric device according to claim 3, wherein: an insulating pad (7) is arranged on the fixing surface of the watch case current collecting cover (2) and the shell of the electric equipment (1).
5. A leakage detection device for a surface of a casing of an electric device according to claim 1, wherein: the corner current collection cover (6) is a right-angle cone-shaped cover body and comprises three plate surfaces, wherein any two adjacent plate surfaces in the three plate surfaces are perpendicular to each other and are butted at the edges of the two adjacent plate surfaces.
6. An electrical leakage detection apparatus for a surface of a casing of an electrical device according to claim 5, characterized in that: and an insulating pad (7) is arranged between the corner current collecting cover (6) and the end face at the corner of the electric equipment (1).
7. A leakage detection device for a surface of a casing of an electric device according to claim 2, wherein: the detection mechanism (4) is internally provided with a detection circuit, the detection circuit comprises a current transformer, a lead (3) is connected with the primary side of the current transformer, the secondary side of the current transformer is connected with the input end of a microprocessor, and the output end of the microprocessor is connected with an alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921787009.6U CN210894641U (en) | 2019-10-23 | 2019-10-23 | Electric leakage detection device for surface of electric equipment shell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921787009.6U CN210894641U (en) | 2019-10-23 | 2019-10-23 | Electric leakage detection device for surface of electric equipment shell |
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| CN210894641U true CN210894641U (en) | 2020-06-30 |
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| CN201921787009.6U Active CN210894641U (en) | 2019-10-23 | 2019-10-23 | Electric leakage detection device for surface of electric equipment shell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113282126A (en) * | 2021-07-22 | 2021-08-20 | 南京开关厂有限公司 | Circuit breaker monitoring system and method |
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2019
- 2019-10-23 CN CN201921787009.6U patent/CN210894641U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113282126A (en) * | 2021-07-22 | 2021-08-20 | 南京开关厂有限公司 | Circuit breaker monitoring system and method |
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