CN111453572A - Elevator door lock ground fault detection and positioning method - Google Patents
Elevator door lock ground fault detection and positioning method Download PDFInfo
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- CN111453572A CN111453572A CN202010293428.5A CN202010293428A CN111453572A CN 111453572 A CN111453572 A CN 111453572A CN 202010293428 A CN202010293428 A CN 202010293428A CN 111453572 A CN111453572 A CN 111453572A
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- door lock
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- elevator door
- elevator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0025—Devices monitoring the operating condition of the elevator system for maintenance or repair
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Abstract
The invention discloses a method for detecting and positioning an elevator door lock ground fault, which comprises the following steps: initial measurement, namely measuring the current value I flowing through the coil of the elevator landing door lock relay respectively in the maintenance stateAAnd measuring the current value I of the door lock of the landing door flowing through the lowest floorA1(ii) a Calculating the difference value according to the current value IASum current value IA1Calculating the current difference value delta I ═ IA‑IA1(ii) a Judging the fault when the delta I is more than or equal to IKminWhen the elevator door lock is in the grounding fault, the elevator door lock is positioned by adopting a bisection method, and when the elevator door lock is in the delta I state<IKminWhen the elevator door lock has no ground fault, the detection is finished, wherein IKminThe minimum driving current for the actuation of the door lock relay of the elevator landing door. The method can conveniently and quickly detect the grounding fault of the elevator door lock and accurately position the floor where the fault is located, is favorable for improving the discovery rate of potential safety hazards and guiding maintenance conveniently, can avoid serious influence on field operation, and is favorable for improving the practical application value.
Description
Technical Field
The invention relates to the technical field of elevator fault detection, in particular to a method for detecting and positioning an elevator door lock ground fault.
Background
The elevator door lock circuit is a very important member of many elevator control circuits, and failure of the elevator door lock circuit can have serious consequences. However, in the existing elevator inspection rules, there is no inspection for inspecting the potential ground hazard, but only for inspecting whether the exposed conductive parts of the electrical equipment, the line pipe and the line slot are reliably connected with the protection wire PE (protection conductor). The inspector does not carry out deep inspection on the potential safety hazard problem of door opening and ladder walking caused by the accidental ground fault, and mature instruments and methods for safely inspecting the ground fault do not exist in domestic and foreign markets.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a method for detecting and positioning the ground fault of the elevator door lock, which can detect and position the ground fault of the elevator door lock.
According to the embodiment of the first aspect of the invention, the method for detecting and positioning the ground fault of the elevator door lock comprises the following steps:
initial measurement, namely measuring the current value I flowing through the coil of the elevator landing door lock relay respectively in the maintenance stateAAnd measuring the current value I of the door lock of the landing door flowing through the lowest floorA1；
Calculating the difference value according to the current value IASum current value IA1Calculating the current difference value delta I ═ IA-IA1；
Judging the fault when the delta I is more than or equal to IKminWhen the elevator door lock is in the grounding fault, the elevator door lock is positioned by adopting a bisection method, and when the elevator door lock is in the delta I state<IKminWhen the elevator door lock has no ground fault, the detection is finished, wherein IKminThe minimum driving current for the actuation of the door lock relay of the elevator landing door.
The elevator door lock ground fault detection and positioning method provided by the embodiment of the invention at least has the following beneficial effects: the method can conveniently and quickly detect the grounding fault of the elevator door lock and accurately position the floor where the fault is located, is favorable for improving the discovery rate of potential safety hazards and guiding maintenance conveniently, can avoid serious influence on field operation, and is favorable for improving the practical application value.
According to some embodiments of the invention, the elevator door lock ground fault location is performed by a bisection method, which specifically comprises the following steps:
a. selecting a middle floor by taking a lowest floor and a top floor as boundaries;
b. measuring the value of the current I flowing through the door lock of the landing floormAnd calculating the current difference DeltaIm＝IA-Im；
c. When Delta I is more than or equal to IKminIf the elevator door lock is in the middle floor, the elevator door lock is in the upper limit floor, otherwise, the elevator door lock is in the lower limit floor;
d. if Δ Im≥IKminAnd e, with the highest floor and the middle floor in the step c as boundaries, reselecting the middle floor, repeating the steps b to d until the elevator door lock ground fault position positioning is completed, and if delta I is obtainedm<IKminAnd c, with the middle floor and the lowest floor in the step c as boundaries, reselecting the middle floor, and repeating the steps b to d until the positioning of the grounding fault position of the elevator door lock is completed.
According to some embodiments of the invention, the elevator door lock ground fault detection and location method further comprises the steps of:
when the elevator door lock earth fault positioning is completed by adopting the bisection method, fault removal is carried out;
and after the fault is eliminated, repeating the steps of initial measurement, difference value calculation and fault judgment until all faults are eliminated.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of an elevator door lock ground fault detection positioning method according to an embodiment of the present invention;
fig. 2 is one of schematic circuit diagrams of an elevator landing door lock according to an embodiment of the present invention;
FIG. 3 is a flow chart of the elevator door lock ground fault location method shown in FIG. 1 using bisection to locate the elevator door lock ground fault;
fig. 4 is one of schematic circuit diagrams of an elevator landing door lock according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1 and fig. 2, an embodiment of the invention discloses a method for detecting and positioning an elevator door lock ground fault, which includes the following steps:
(1) initial measurement, namely measuring the current value I flowing through the coil of the elevator landing door lock relay respectively in the maintenance stateAAnd measuring the current value I of the door lock of the landing door flowing through the lowest floorA1。
In the building provided with the van elevator, each floor of the building is provided with an elevator landing door, a landing door lock is arranged on each elevator landing door of each floor, and after the landing door locks of each floor are sequentially connected in series from a high floor to a low floor, one end of each landing door lock is connected with an elevator landing door lock relay coil KC, and the other end of each landing door lock relay coil is grounded. Under normal conditions, in order to ensure that the elevator can operate after all the landing doors are closed, only when all the landing door locks are closed, the coil KC of the elevator landing door lock relay has current flowing through, so that the elevator can operate after the elevator landing door lock relay is closed. Because most of the lines of the elevator extend into the hoistway from the machine room, current measurement is carried out in the maintenance state, and the safety of maintenance personnel is ensured.
(2) Calculating the difference value according to the current value IASum current value IA1Calculating the current difference value delta I ═ IA-IA1。
In practical situations, when the landing door lock is closed, a certain loss exists when current flows through the landing door lock of each floor, and each landing door lock can be equivalent to a resistor. Under normal conditions, all the layer door locks are connected in series, according to the current characteristics of the series circuit, IA＝IA1I.e. Δ I ═ IA-IA10; when the elevator door lock ground fault occurs on a certain floor, the current flowing through the relay coil of the elevator door lock can leak from the fault floor, namely the elevator door lock between the fault floor and the lowest floor is in short circuit or is connected in parallel with a resistor with small resistance value, and according to the current characteristics of the parallel circuit, IA10 or IA＝IA1+ Δ I, i.e. 0<ΔI≤IA. Therefore, when detecting whether the landing door lock of each floor has the elevator door lock ground fault or not, the current value I flowing through the relay coil of the landing door lock of the elevator can be detectedAAnd the current value I of the door lock of the landing door flowing through the lowest floorA1The difference in current between Δ I serves as one of the criteria.
(3) Judging the fault when the delta I is more than or equal to IKminWhen the elevator door lock is in the grounding fault, the elevator door lock is positioned by adopting a bisection method, and when the elevator door lock is in the delta I state<IKminWhen the elevator door lock has no ground fault, the detection is finished, wherein IKminThe minimum driving current for the actuation of the door lock relay of the elevator landing door.
When the elevator door lock earth fault occurs on a certain floor, the current flowing through the coil of the elevator door lock relay can leak from the floor, and when the leaked current is larger than or equal to the minimum driving current I of the actuation of the elevator door lock relayKminIn the time, the situation that the elevator landing door is opened but the door lock relay of the elevator landing door can still be attracted can occur, so that the accident of accidental starting of the elevator can occur. Therefore, the minimum driving current I is absorbed by the current difference value delta I and the elevator landing door lock relayKminThe method can conveniently and quickly detect the grounding fault of the elevator door lock, is favorable for improving the discovery rate of potential safety hazards and conveniently guiding maintenance, and can accurately position the floor where the fault is located by adopting the dichotomy after the grounding fault of the elevator door lock is detected. The method of the embodiment of the invention can adopt the clamp ammeter when measuring the current, thereby avoiding serious influence on the operation of the field and being beneficial to improving the practical application value.
Referring to fig. 3 and 4, the method for locating the ground fault of the elevator door lock by using the bisection method specifically comprises the following steps:
a. selecting a middle floor by taking a lowest floor and a top floor as boundaries;
for example, when the number of floors of a building is from 1 st floor to 7 th floor, the middle floor is the 4 th floor; for another example, when the number of floors of the building is minus 1 th floor to 7 th floor, the middle floor is 3 rd floor or 4 th floor, and the middle floor can be selected upwards or downwards according to practical application. It should be understood that the lowest floor and the top floor in this embodiment are both floors with elevator landing doors installed.
b. Measuring the value of the current I flowing through the door lock of the landing door at the middle floormAnd calculating the current difference DeltaIm＝IA-Im；
c. When Delta I is more than or equal to IKminWhen the elevator door lock is in the ground fault position, the elevator door lock is in the upper limit floor and the middle floor, otherwise, the elevator door lock is in the ground fault position;
when the lowest floor and the top floor are taken as boundaries, the top floor is an upper limit floor, the lowest floor is a lower limit floor, for example, when the floor number of a building is from the 1 st floor to the 7 th floor, the 7 th floor is an upper limit floor, the 1 st floor is a lower limit floor, the 4 th floor is a middle floor, and when the calculated current difference delta I is larger than or equal to IKminIn the meantime, the position of the ground fault of the elevator door lock is located between floors of the 7 th floor and the 4 th floor, that is, may be located at the 4 th floor, the 5 th floor, the 6 th floor or the 7 th floor.
d. If Δ Im≥IKminAnd e, with the highest floor and the middle floor in the step c as boundaries, reselecting the middle floor, repeating the steps b to d until the elevator door lock ground fault position positioning is completed, and if delta I is obtainedm<IKminAnd c, with the middle floor and the lowest floor in the step c as boundaries, reselecting the middle floor, and repeating the steps b to d until the elevator door lock ground fault position positioning is completed.
For example, when the number of floors of a building is from 1 st floor to 7 th floor, the intermediate floor is the 4 th floor, if Δ Im≥IKminIf the 7 th floor and the 4 th floor are taken as the boundary, the middle floor after reselection is the 5 th floor or the 6 th floor; if Δ Im<IKminIf the 4 th floor and the 1 st floor are taken as the boundary, the middle floor after reselection is the 2 nd floor or the 3 rd floor, it should be noted that the middle floor can be selected upwards or downwards according to the actual situation. And (4) after the middle floor is selected, repeating the steps b to d until the elevator door lock grounding fault position is positioned, and then overhauling is carried out according to the actual condition. It should be noted that after the maintenance is completed, the steps of initial measurement, difference calculation and fault judgment, i.e. the steps (1) to (3), need to be repeated to ensure that the fault is completely eliminated.
In order to further understand the method for detecting and positioning the ground fault of the elevator door lock of the embodiment of the invention, a specific embodiment is described in detail below with reference to fig. 4. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting.
Referring to fig. 4, the building shown in fig. 4 has 7 floors, namely floors L to L, each floor is provided with an elevator landing door, a landing door lock is mounted on the elevator landing door of each floor, and after the landing door locks of each floor are sequentially connected in series from a high floor to a low floor, one end of each landing door lock is connected with an elevator landing door lock relay coil KC, and the other end of each landing door lock is grounded.
Assuming that the floor L5 has an elevator door lock ground fault, when detection is carried out, the elevator is placed in a maintenance state to ensure the safety of maintenance personnel;
measuring the value of the current I flowing through the elevator landing door lock relay coil KC in the machine room of an elevatorAI.e. the value of the current flowing through node a, and the value of the landing door lock current I measured at floor L1 in the shaft of the elevatorA1I.e., the value of current flowing through node a 1;
according to the current value IASum current value IA1Calculating the current difference value delta I ═ IA-IA1It is found that Δ I.gtoreq.IKminIndicating the presence of an elevator door lock ground fault, wherein IKminThe minimum driving current is the minimum driving current for the actuation of a door lock relay of the elevator landing door;
the elevator door lock ground fault location is carried out by adopting a bisection method, namely, the floor L4 is an intermediate floor, and the current value I flowing through the node A4 is measuredA4Then the current value I of the door lock of the landing door flowing through the middle floorm＝IA4Calculating Δ Im＝IA-Im＝IA-IA4It was found thatm≥IKminThen, with floor L7 and floor L4 as boundaries, floor L6 is reselected as an intermediate floor;
measuring the value of current I flowing through node A6A6Then the current value I of the door lock of the landing door flowing through the middle floorm＝IA6Calculating Δ Im＝IA-Im＝IA-IA6It was found thatm<IKminIf the elevator door lock ground fault does not exist from the floor L6 to the floor L7, the floor L5 is reselected as an intermediate floor by taking the floor L5 and the floor L4 as boundaries;
measuring the value of current I flowing through node A5A5Then the current value I of the door lock of the landing door flowing through the middle floorm＝IA5Calculating Δ Im＝IA-Im＝IA-IA5It was found thatm≥IKminThe elevator door lock ground fault is determined to occur at the floor L5, the elevator can run by verifying that the floor L5 is opened, and the elevator door lock ground fault can be finally judged to exist at the floor L5.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (3)
1. An elevator door lock ground fault detection positioning method is characterized by comprising the following steps:
initial measurement, namely measuring the current value I flowing through the coil of the elevator landing door lock relay respectively in the maintenance stateAAnd measuring the current value I of the door lock of the landing door flowing through the lowest floorA1；
Calculating the difference value according to the current value IASum current value IA1Calculating the current difference value delta I ═ IA-IA1；
Judging the fault when the delta I is more than or equal to IKminWhen the elevator door lock is in the grounding fault, the elevator door lock is positioned by adopting a bisection method, and when the elevator door lock is in the delta I state<IKminWhen the elevator door lock has no ground fault, the detection is finished, wherein IKminThe minimum driving current for the actuation of the door lock relay of the elevator landing door.
2. The elevator door lock ground fault detection and positioning method according to claim 1, wherein the elevator door lock ground fault positioning is performed by a bisection method, and specifically comprises the following steps:
a. selecting a middle floor by taking a lowest floor and a top floor as boundaries;
b. measuring the value of the current I flowing through the door lock of the landing floormAnd calculating the current difference DeltaIm＝IA-Im；
c. When Delta I is more than or equal to IKminIf the elevator door lock is in the middle floor, the elevator door lock is in the upper limit floor, otherwise, the elevator door lock is in the lower limit floor;
d. if Δ Im≥IKminAnd e, with the highest floor and the middle floor in the step c as boundaries, reselecting the middle floor, repeating the steps b to d until the elevator door lock ground fault position positioning is completed, and if delta I is obtainedm<IKminAnd c, with the middle floor and the lowest floor in the step c as boundaries, reselecting the middle floor, and repeating the steps b to d until the positioning of the grounding fault position of the elevator door lock is completed.
3. The elevator door lock ground fault detection and location method according to claim 1 or 2, further comprising the steps of:
when the elevator door lock earth fault positioning is completed by adopting the bisection method, fault removal is carried out;
and after the fault is eliminated, repeating the steps of initial measurement, difference value calculation and fault judgment until all faults are eliminated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010293428.5A CN111453572A (en) | 2020-04-15 | 2020-04-15 | Elevator door lock ground fault detection and positioning method |
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| CN202010293428.5A CN111453572A (en) | 2020-04-15 | 2020-04-15 | Elevator door lock ground fault detection and positioning method |
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| CN108016965A (en) * | 2017-12-28 | 2018-05-11 | 成都沪菱科技有限公司 | A kind of elevator safety monitoring system and elevator |
| CN108483163A (en) * | 2018-04-25 | 2018-09-04 | 广东省特种设备检测研究院珠海检测院 | A kind of elevator door lock safety return circuit earth fault demo system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3219655A1 (en) * | 2016-03-14 | 2017-09-20 | Kone Corporation | Method for determining speed of an electric motor, an elevator control unit utilizing the method thereof and a computer program product |
| CN205941742U (en) * | 2016-08-17 | 2017-02-08 | 无锡新纺欧迪诺电梯有限公司 | Lock loopback test appearance |
| CN205953240U (en) * | 2016-08-24 | 2017-02-15 | 湖州晶科电子有限公司 | Elevator door lock's detection and protection circuit |
| CN106744112A (en) * | 2016-12-27 | 2017-05-31 | 快意电梯股份有限公司 | The detection circuit and detection method of elevator door lock loop short circuit |
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Application publication date: 20200728 |
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