CN106672765B - Detection and protection circuit of elevator door lock - Google Patents
Detection and protection circuit of elevator door lock Download PDFInfo
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- CN106672765B CN106672765B CN201611261605.1A CN201611261605A CN106672765B CN 106672765 B CN106672765 B CN 106672765B CN 201611261605 A CN201611261605 A CN 201611261605A CN 106672765 B CN106672765 B CN 106672765B
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- 238000012423 maintenance Methods 0.000 description 10
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/143—Control systems or devices electrical
- B66B13/146—Control systems or devices electrical method or algorithm for controlling doors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
- B66B13/165—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position electrical
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Elevator Door Apparatuses (AREA)
- Elevator Control (AREA)
Abstract
The invention relates to a detection and protection circuit of an elevator door lock, which comprises an elevator control panel, an operation contactor, a band-type brake contactor, a detection relay and a switch series circuit, wherein the switch series circuit comprises a plurality of detection switch groups which are connected in series, and each detection switch group is connected with a door switch circuit detection point in the elevator control panel. The circuit has simple structure, safety and reliability, and can effectively reduce the occurrence of elevator accidents.
Description
Technical Field
The invention belongs to the field of vertical lifting elevator door locks, and particularly relates to a detection and protection circuit of an elevator door lock.
Background
In the use process of the vertical elevator, as the car door lock switch and the hall door lock switch are in short circuit or short circuit, the elevator runs in a door opening state, shearing accidents occur, and great loss of personnel and property is caused. The elevator control system is provided with a door lock short circuit detection circuit to prevent the accidents, and once the door lock is detected to be short-circuited or short-circuited, the elevator stops running.
The detection and protection circuit of the elevator door lock in the prior art 1 is shown as the attached figure 1. The detection and protection circuit of the elevator door lock provided in figure 1 is briefly described as follows:
1. the elements marked as S L AF in the attached figure 1 are safety switches of an elevator, namely a series-connection main loop of all safety switches such as an elevator speed limiter, a safety clamp, an emergency stop switch, an upper limit, a lower limit, a buffer, a rope breaking switch, a phase sequence protection switch and the like;
s L T1(1-n) is that a hall door detection switch (series connection) of a floor on which the door of an elevator door machine 1 needs to be opened is arranged, when the elevator is opened on a certain floor, the corresponding hall door of the floor is opened, and the switch is disconnected;
s L J1 is a car door detection switch opened by the door motor 1 of the elevator, wherein when the elevator is opened, the car door is opened and the switch is disconnected;
s L T2(1-n) is that a door detection switch (series connection) of the floor where the door machine 2 of the elevator needs to open the door, when the elevator opens the door at a certain floor, the corresponding floor door is opened, and the switch is disconnected;
s L J2 is a car door detection switch opened by the door machine 2 of the elevator, wherein when the elevator is opened, the car door is opened and the switch is disconnected;
x1, X2, X3: elevator control panel input terminal. X1 is a safety circuit detection point; x2 is door switch detection point 1; x3 is door switch detection point 2;
KZB: an elevator control panel;
KMY: operating the contactor; a control contactor of a power supply of the tractor.
KMB: band-type brake contactor, control contactor of traction machine braking power supply
INV: a frequency converter;
m: an elevator traction machine;
BZ: a band-type brake of the traction machine and a braking mechanism of the traction machine.
2. The brief introduction of the working principle is as follows:
when the elevator normally works, the safety switch S AF is closed, the current is conducted from the 101-S-103 to the high-voltage detection terminal X of the safety circuit in the elevator control panel, the elevator control panel judges that the safety circuit is normal, when the door 1 is closed, the corresponding hoistway door lock switch S T (1-n) and the car door lock switch S0J are closed, when the door 2 is closed, the corresponding hoistway door lock switch S (1-n) and the car door lock switch S J are closed, the current is conducted from the 101-S-105-107 to the control panel middle door switch circuit detection terminal X, when the door 1 and the door 2 are both closed, the control panel considers that the hoistway door is completely closed, the current is conducted from the 101-S-105-109-the control panel middle door switch circuit detection terminal X, when the control panel considers that the door is completely closed, the control panel receives the signals of X, the elevator safety is confirmed, the door is closed, the control panel instructs to close Y and when the current is not conducted from the KMn-S-X-105-S-X, KMn, the control panel operates, the door-K-S-X short-K.
3. The existing defects are as follows:
the switches are connected in series, after the door 1 is opened, the switches S L T1(1-n) and S L J1 are opened, and the switches X2 and X3 consider that the door is opened, and at this time, the switches S L T2(1-n) and S L J2 of the door 2 cannot perform effective state identification.
The detection and protection circuit of the elevator door lock in the prior art 2 is shown in the attached figure 2. The detection and protection circuit of the elevator door lock provided in fig. 2 is briefly described as follows:
1. in the attached figure 2, the components are marked as S L AF, namely, the safety switches of the elevator, namely, a series-connection main loop of all safety switches such as an elevator speed limiter, a safety clamp, an emergency stop switch, an upper limit, a lower limit, a buffer, a rope breaking switch, a phase sequence protection switch and the like;
s L T1(1-n) is that a hall door detection switch (series connection) of a floor on which the door of an elevator door machine 1 needs to be opened is arranged, when the elevator is opened on a certain floor, the corresponding hall door of the floor is opened, and the switch is disconnected;
s L J1 is a car door detection switch opened by the door motor 1 of the elevator, wherein when the elevator is opened, the car door is opened and the switch is disconnected;
s L T2(1-n) is that a door detection switch (series connection) of the floor where the door machine 2 of the elevator needs to open the door, when the elevator opens the door at a certain floor, the corresponding floor door is opened, and the switch is disconnected;
s L J2 is a car door detection switch opened by the door machine 2 of the elevator, wherein when the elevator is opened, the car door is opened and the switch is disconnected;
x1, X2, X3, X4: an elevator controller input point; x1 is a safety circuit detection point; x2 is door switch detection point 1; x3 is door switch detection point 2; x4 is door switch detection point 3;
KZB: an elevator control panel;
KMY: operating the contactor; a control contactor of a power supply of the tractor.
KMB: band-type brake contactor, control contactor of traction machine braking power supply
INV: a frequency converter;
m: an elevator traction machine;
BZ: a band-type brake of the traction machine and a braking mechanism of the traction machine;
TQB: an elevator control panel that opens doors in advance; the elevator reaches a target floor, in the process of deceleration, when the elevator reaches a designated area, the control panel which opens the door in advance sends an instruction, the elevator opens the door while running, and when the elevator reaches a flat floor position and parks, the elevator door is opened, so that the overall running efficiency of the elevator is improved;
KAM: a door sealing relay; KAM-1 and KAM-2 are contacts of the door sealing relay.
2. The brief introduction of the working principle is as follows:
when the elevator normally works, the safety switch S L AF is closed, the current is conducted from 101-103 to a safety loop high-voltage detection terminal X1 in an elevator control panel, the elevator control panel judges that the safety loop is normal, when the doors 1 and 2 are both closed, the current is conducted from 101-103-105 to a control panel door switch circuit detection terminal X2, the elevator control panel considers that the hoistway door 1 is completely closed, the current is conducted from 101-103-109-3, the control panel considers that the car door is completely closed, the current is conducted from 101-103-107-109-111 to a control panel door switch circuit detection terminal X4, the control panel considers that the elevator door is completely closed, the control panel receives an X4 signal to confirm that the elevator is safe and the doors are closed, sends out closing instructions Y1, Y2, the current is sent out from 101-103-109-111-Y-1-KMY to open the elevator door, the elevator door is closed, the elevator door is opened, the elevator control panel operates from 101-105-5-9-KM-K, the elevator door switch S-K-7-K, the elevator control panel detects that the elevator door is closed, the elevator door 111-K-19-K-9, the elevator door is closed, the elevator door-9-K-7-9, the elevator door is open, the elevator door switch is opened, the elevator control panel detects that the elevator door is open, the elevator door is open-K-19, the elevator door-9, the elevator door is open-19, the elevator door is open-K-19, the elevator door-K-:
a. 101-103-105-X2 (detection S L T1 (1-n));
b. 101-103-107(KAM-1) -105-X2 (test S L J1);
c. 101-, 103-, 107(KAM-1) -109-X3 (detection S L T2 (1-n));
d. 101-, 103-, 107(KAM-1) -111(KAM-2) -109-X3 (detection S L T2 (1-n));
if any one of the X2 and the X3 is effective at the moment, the control board considers that the door lock is short-circuited and stops the operation.
3. The existing defects are as follows:
a. the door lock short circuit detection can be carried out only by means of the door plate opening in advance TQB, and manual active operation detection is difficult to carry out;
b. the purpose of door lock detection is to prevent the door lock from being short-circuited, however, the detection process of the scheme is an early door opening process, and is realized by outputting a short-circuited door lock through the KAM, at this time, the current is conducted from 101-103-107(KAM-1) -111(KAM-2) -COM, the external conditions of the work of the contactors KMY and KMB are all met, and the safety risk exists;
c. in the door lock detection process (namely, the process of opening the door in advance), the elevator can work only in the running process, and the elevator runs and is in a door opening state at the same time, so that the safety risk exists;
d. in the door lock detection process (namely, the process of opening the door in advance), the elevator can work only in an automatic running state, and the door lock switch cannot be detected in an overhaul state, so that the safety risk exists;
e. the detection process only exists in the working process of the early door opening module, once the elevator arrives at a station and stops running, the early door opening module stops working, the door lock switch can not be detected any more, and the safety risk exists;
f. KAM-1 and KAM-2 are that the control panel of opening the door in advance is from the area, and the contact quantity is restricted, and application range receives the restriction of contact, if have more than two doors, current module of opening the door in advance can't realize. The control panel which needs to be redesigned in advance is needed to be added, and the PCB is changed; however, the control panel for opening the door in advance is required to be subjected to national mandatory authentication, the modification is required to pass the national authentication again, the period is long, and the effectiveness of all products cannot be ensured in actual use;
g. and an advance door opening control panel and a flat switch must be additionally arranged, so that the cost is higher.
Disclosure of Invention
In view of the above, the present invention provides a safe and economical detection and protection circuit for an elevator door lock.
A detection and protection circuit of an elevator door lock comprises an elevator control panel, a running contactor, a band-type brake contactor, a detection relay and a switch series circuit, wherein the switch series circuit comprises a plurality of detection switch groups which are connected in series, each detection switch group comprises at least one hoistway door detection combination switch and at least one car door detection switch, each detection switch group is connected with a detection point of a door switch circuit in an elevator control panel, the detection relay at least comprises a plurality of normally closed contacts and normally open contacts, and the first end of the switch series circuit is connected with an alternating current power supply live wire, the second end of the switch series circuit is connected with a door switch circuit detection point, a running contactor and a band-type brake contactor which are used for detecting the on-off of the switch series circuit in an elevator control panel through a normally closed contact, and meanwhile, the connection point between every two adjacent detection switch groups in the switch series circuit is connected with the live wire of the alternating current power supply through a normally open contact.
The detection and protection circuit of the elevator door lock provided by the invention can be further set to be a detection and protection circuit of the elevator door lock, and further comprises a safety switch, wherein the safety switch is connected between a live wire of an alternating current power supply and a first end of the switch series circuit in series, and a connecting point between the safety switch and the first end of the switch series circuit is connected with a detection point of the safety circuit in an elevator control panel.
The detection and protection circuit of the elevator door lock can be further set to be that one car door detection switch in each detection switch group corresponds to one landing door detection combined switch, and a connecting point between two adjacent landing door detection combined switches and car door detection switches in the same detection switch group is connected with a corresponding door switch detection point in an elevator control panel.
The detection and protection circuit of the elevator door lock provided by the invention can be further set as that the switch series circuit comprises a first hall door detection combined switch, a first car door detection switch, a second car door detection switch and a second hall door detection combined switch which are sequentially connected in series, wherein the first hall door detection combined switch in the switch series circuit is connected with an alternating current power live wire, the second hall door detection combined switch is connected with a door switch circuit detection point for detecting the on-off of the switch series circuit in an elevator control panel through a normally closed contact in a detection relay, a connecting point between the first hall door detection combined switch and the first car door detection switch is connected with a first door switch circuit detection point in the elevator control panel, a connecting point between the second car door detection switch and the second hall door detection combined switch is connected with a second door switch circuit detection point in the elevator control panel, the connecting point between first sedan-chair door detection switch and the second sedan-chair door detection switch passes through the first normally open contact in the detection relay and links to each other with the alternating current power supply live wire, and the second hall door detects the connecting point between the normally closed contact in combination switch and the detection relay and also links to each other with the alternating current power supply live wire through the second normally open contact in the detection relay.
The detection and protection circuit of the elevator door lock provided by the invention can be further set to be a detection and protection circuit of the elevator door lock, and also comprises an operation contactor circuit switch and a brake contactor circuit switch which are controlled by an elevator control panel, wherein one end of an operation contactor is connected with a door switch circuit detection point which is used for detecting the on-off of a switch series circuit in the elevator control panel through the operation contactor circuit switch, and the other end of the operation contactor is connected with an alternating-current power supply zero line; one end of the band-type brake contactor is connected with a door switch circuit detection point of the elevator control panel for detecting the on-off of the switch series circuit through a band-type brake contactor circuit switch, and the other end of the band-type brake contactor is connected with an alternating current power supply zero line.
The detection and protection circuit of the elevator door lock can be further set to be a combination of the hall door detection combination switches which are connected in series corresponding to the hall door detection switches of all floors of the same car door.
The detection and protection circuit of the elevator door lock provided by the invention has the advantages of simple structure, safety and reliability, and can effectively reduce the occurrence of elevator accidents.
Drawings
Preferred embodiments of the present invention will now be described, preferably with reference to the accompanying drawings, in which,
fig. 1 is a schematic diagram of a prior art 1 elevator door lock detection and protection circuit;
fig. 2 is a schematic diagram of a detection and protection circuit of an elevator door lock of prior art 2;
FIG. 3 is a schematic diagram of embodiment 1 provided by the present invention;
FIG. 4 is a schematic diagram of embodiment 2 provided by the present invention;
wherein the content of the first and second substances,
s L AF is a safety switch of the elevator, namely a series connection main loop of all safety switches such as an elevator speed limiter, a safety clamp, an emergency stop switch, an upper limit, a lower limit, a buffer, a rope breaking switch, a phase sequence protection switch and the like;
s L T1(1-n) is a first hall door detection combination switch, namely a hall door detection combination switch (a combination of series connection of hall door detection switches corresponding to all floors of the door machine 1 of the elevator) of a floor on which the door machine 1 of the elevator needs to be opened;
s L J1 is a first car door detection switch, namely a car door detection switch opened by a door machine 1 of the elevator, wherein when the elevator is opened, the car door is opened, and the switch is disconnected;
s L T2(1-n) is a second hall door detection combination switch, namely a hall door detection combination switch (a combination of the hall door detection switches corresponding to all floors of the door machine 2 of the elevator which are connected in series) of the floor on which the door machine 2 of the elevator needs to open;
s L J2 is a second car door detection switch, namely a car door detection switch opened by the door machine 2 of the elevator, wherein when the elevator is opened, the car door is opened, and the switch is disconnected;
x1, X2, X3, X4, X5: an elevator control panel input terminal; x1 is a safety circuit detection point; x2 is the first door switch detection point; x3 is a second gate switch circuit detection point; x4 is a door switch circuit detection point for detecting the on-off of the switch series circuit; x5 is a detection point for detecting the self fault of the relay;
KZB: an elevator control panel;
KMY: operating the contactor; a control contactor of a power supply of the traction machine;
KMB: a band-type brake contactor and a control contactor of a traction machine braking power supply;
y1: operating a circuit switch of the contactor and controlling by an elevator control board;
y2: the circuit switch of the band-type brake contactor is controlled by an elevator control board;
y3: a safety relay circuit switch;
INV: a frequency converter;
m: an elevator traction machine;
BZ: a band-type brake of the traction machine and a braking mechanism of the traction machine;
KAM: a door lock short circuit detection relay (contactor), KAM-1, KAM-2, KAM-3 and KAM-4 are respectively different output contacts of the same safety relay KAM, wherein KAM-1, KAM-2 and KAM-4 are normally open contacts, and KAM-3 is a normally closed contact.
Detailed Description
An embodiment of a detection and protection circuit of an elevator door lock according to the present invention is further described with reference to fig. 3 and 4.
Example 1
The detection and protection circuit of the elevator door lock comprises an elevator control panel KZB, an operation contactor KMY, a band-type brake contactor KMB, a detection relay KAM, a safety switch S L AF and a switch series circuit.
Wherein the safety switch S L AF is connected in series between the live ac line 110VAC and the first end of the switch series circuit, and the connection point between the safety switch S L AF and the first end of the switch series circuit is connected to a safety circuit detection point X1 in the elevator control board KZB.
The switch series circuit comprises a first landing door detection combination switch S L T1(1-n), a first car door detection switch S L J1, a second car door detection switch S L J2 and a second landing door detection combination switch S L T2(1-n) which are connected in series in sequence, wherein a first landing door detection combination switch S L2T 1(1-n) in the switch series circuit is connected with an alternating current power live wire 110VAC, a second landing door detection combination switch S L T2(1-n) end is connected with a door switch detection point X4 used for detecting the on-off of the switch series circuit in an elevator control panel KZB through a normally closed contact KAM-3 in a detection relay KAM, wherein the first landing door detection combination switch S4T 4 (1-n) and the first landing door detection combination switch S4J are connected with a first elevator control panel KAM switch detection point X4 in the first landing door detection switch K KZB K, a second landing door detection combination switch S4 is connected with a second landing door detection switch KAM 4J 4 through a normally closed contact in the detection relay KAM-4K-3, and a second landing door detection switch K4J-4 connected with a second landing door detection switch (a second landing door detection switch K-36K-K-3 in the detection relay K-B) in the detection relay K-B-4K-B-4K-B.
Meanwhile, the detection and protection circuit of the elevator door lock further comprises an operation contactor KMY circuit switch Y1 and a contracting brake contactor KMB circuit switch Y2 which are controlled by an elevator control panel KZB, wherein one end of the operation contactor KMY is connected with a door switch circuit detection point X4 used for detecting the on-off of a switch series circuit in the elevator control panel KZB through an operation contactor KMY circuit switch Y1, and the other end of the operation contactor KMY is connected with a 110VAC zero line of an alternating-current power supply live wire; one end of the brake contactor KMB is connected with a door switch circuit detection point X4 of an elevator control board KZB for detecting the on-off of a switch series circuit through a brake contactor KMB circuit switch Y2, and the other end of the brake contactor KMB is connected with a 110VAC zero line of an alternating current power supply live wire.
The hall door detection combination switch is a combination of the hall door detection switches of all floors connected in series corresponding to the same car door.
And a safety relay circuit switch Y3 on the elevator control board KZB is also connected in series in a power supply circuit of the safety relay KAM, so that the normal operation of the safety relay is ensured.
Example 2
A safety relay contact KAM-4 is added on the basis of the embodiment 1, and the contact KAM-4 is a normally open contact and is arranged between a live wire 24VDC in a power supply circuit of an elevator control panel KZB and a detection point X5 for detecting the fault of the relay per se in the elevator control panel KZB.
The working principle of the detection and protection circuit of the elevator door lock provided by the embodiment 1 and the embodiment 2 is as follows:
when the elevator normally works, the safety switch S L AF is closed, the circuit from the 101-phase 103 to the high-voltage detection terminal X1 of the safety loop in the elevator control panel is conducted, the elevator control panel judges that the safety loop is normal, when the doors 1 and 2 are both closed, the circuit from the 101-phase 103-phase 105 to the detection point X2 of the elevator control panel switch circuit is conducted, the control panel considers that the hoistway door 1 is completely closed, the circuit from the 101-phase 103-phase 105-phase 107-phase 109 to the detection point X3 of the elevator control panel switch circuit is conducted, the control panel considers that the elevator door is completely closed, the current from the 101-phase 103-109-phase 109-111-phase 113 to the detection point X4 of the elevator control panel switch circuit, the control panel considers that the elevator door is completely closed, the elevator control panel receives the X4 signal, confirms that the elevator safety and door is closed, the elevator control panel gives an instruction to close the switches Y1 and Y28 inside the elevator control panel, the elevator control panel detects that the elevator door open-phase-open-door-close-door-open-door-open-type elevator control panel, the normal-open-door-open-door-open-door:
101-103-105-X2, detecting S L T1 (1-n);
101-103-107(KAM-1) -105-X2, detecting S L J1;
101-103-107(KAM-1) -109-X3, detecting S L J2;
101-103-111(KAM-2) -109-X3, detecting S L T2 (1-n);
if any one of the X2 and the X3 is effective at the moment, the control board considers that the door lock is short-circuited and stops the operation.
During detection, after the KAM acts, the normally closed contact KAM-3 is disconnected, and the connection between the door lock loop and a subsequent circuit is cut off, so that real single door lock loop detection is realized; at the moment, because the normally open contacts KAM-1 and KAM-2 are all closed, if the normally closed contact KA M-3 is not opened, the circuits 101 and 103 and 111-COM-Y1-KMY of the operating contactor KMY and the circuits 101 and 103 and 105 and 107 and 111 and 113-COM-Y2-KMB of the contracting brake contactor KMB are all conducted (in case that faults occur inside the elevator control board, Y1 and Y2 act), the operating contactor and the contracting brake contactor act, and thus the danger is caused, which is one of the fundamental disadvantages of the prior art. Since the KAM is a safety relay, the possibility that the normally open contacts KAM-1 and KAM-2 and the normally closed contact KAM-3 are adhered at the same time can not exist, so that the safety in the detection process is ensured.
Because the door opening signal of detection signal and elevator is synchronous, no matter the elevator is opening the door in advance and is moving or leveling the layer state again, and no matter the elevator normally stops the state of opening the door, the maintenance changes normal state of opening the door for the first time, and the elevator opens the door at every turn and all can carry out lock return circuit short circuit and detect the action. In the in-process of in-service use elevator, press the button that kinetic energy made the elevator open the door each time, all be carrying out the lock short circuit and detect, improved the real-time of detection, ensured the security.
Meanwhile, a safety relay contact KAM-4 can be added, and the contact KAM-4 is a normally open contact and is arranged between a live wire 24VDC in a power supply circuit of an elevator control board KZB and a detection point X5 for detecting the self fault of the relay in the elevator control board KZB. The detection method is used for detecting the KAM, so that the detection accuracy caused by the self fault of the KAM is prevented, and the certain and consistent detection of the door lock is improved.
When the elevator control board sends out a detection signal, the KAM acts, the KAM-4 is closed, the X5 is conducted, and the control board obtains feedback of the KAM to confirm that the 'door lock loop detection' is actually executed at present:
if the control panel sends out a detection signal, the KAM does not act, the KAM-4 is not closed, and the X5 is not conducted, the system considers that the KAM is in failure, the 'door lock detection' cannot be executed, the elevator is stopped, and an alarm is given;
if the control panel does not send out the detection signal, KAM action, KAM-4 is closed, X5 is conducted, the system also considers that KAM is in failure, the 'door lock detection' cannot be executed, the elevator is stopped, and an alarm is given.
The sample elevator is controlled by double doors, and when the number of elevator car doors is more than or equal to 2, the detection of one newly added elevator door (corresponding to a car door and a hall door) can be realized only by adding a pair of normally open contacts of a detection input port of a door lock loop of an elevator control plate and a detection relay KAM (contactor) according to the mode; it can be easily expanded to a plurality of doors. At this time, every two detection switches are connected in series to form a group, and all the detection switch groups are connected in series to form a switch series circuit. The connection point of two detection switches in each detection switch group is connected with a door switch circuit detection terminal of the elevator control panel KZB. The connection point between the two detection switch groups is connected with the live wire 110VAC of the alternating current power supply through a normally open contact of the safety relay KAM. The connection point of the switch series circuit and the normally closed contact KAM-3 of the safety relay KAM is connected with the live wire 110VAC of the alternating current power supply through a normally open contact of the safety relay KAM.
On the system that does not have the lock detection, as long as the elevator control panel has the signal of opening the door, the elevator control panel increases the detection input port (one sedan-chair door corresponds to one) and a safety relay KAM (or contactor) of corresponding quantity, just can realize the short circuit of lock or short circuit detection, is convenient for popularize and implement.
And detecting the short circuit of the door lock in the maintenance state. And when the door is opened in the maintenance state, the door lock short circuit detection is also carried out. When the elevator overhauls and turns into when automizing after finishing, the elevator all can carry out once automatic opening the door, just also means overhauls at every turn and finishes the back, all will carry out the detection of lock short circuit. The safety of maintenance personnel is ensured, and the timeliness of detection is also ensured. Under normal conditions, the door lock short circuit faults reported by the embodiment of the invention are all short circuits of the hall door lock or the car door lock of the stopping layer of the elevator when the corresponding faults occur. And because the elevator is prohibited to be started next time after the fault occurs, the fault can be eliminated only by checking the landing door lock and the car door stopped when the fault occurs.
The above embodiment has the following beneficial effects:
1. the door lock short circuit detection process is realized in each door opening process of the elevator, detection can be realized only by opening the door, and detection can be automatically completed only by manually pressing a door opening button of the elevator in a state of opening the door in a condition;
2. the door lock short circuit detection is carried out under the elevator stop state. The door lock short circuit detection is completely executed in the door opening process after the elevator stops, and the detection is carried out when the elevator opens the door each time;
3. and independent detection is realized after the door lock loop is disconnected. During detection, the control of a door lock loop on subsequent electrical components (KMY and KMB) is actively cut off to ensure safety, and then independent detection is carried out on a door lock switch;
4. and the short circuit detection of the door lock under the maintenance state is realized. When the door is opened in the maintenance state, door lock short circuit detection is also carried out, when the elevator is converted into automatic operation after maintenance is finished, the elevator can default to carry out automatic door opening once, namely, the door lock short circuit detection is carried out after each maintenance is finished; the function can avoid the phenomenon that the elevator maintenance personnel forget to remove the door lock short-circuit wire after the elevator maintenance is finished in the prior art, thereby greatly reducing the lethal injury rate;
5. and self-checking of the safety relay is realized. A safety relay contact KAM-4 is added, and the contact KAM-4 is a normally open contact and is arranged between a live wire 24VDC in a power supply circuit of an elevator control panel KZB and a detection point X5 of a detection relay in the elevator control panel KZB. The method is used for detecting the KAM, so that the detection accuracy caused by the self fault of the KAM is prevented, and the certain and consistent detection of the door lock is improved;
6. realize the detection of door lock short circuit when elevator sedan-chair door quantity is greater than or equal to 2. Only one detection point of the system and one normally open contact of the safety relay KAM are needed to realize the detection of one door (corresponding to a car door and a hall door) of the elevator, so that the system can be conveniently expanded into a plurality of doors;
7. on a system without door lock detection, the door lock short circuit or short circuit detection can be realized only by adding a corresponding number of detection points (one car door corresponds to one) and one safety relay KAM (or contactor);
8. can be compatible with most elevator control panels at present, has low cost and is easy to popularize and implement.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalent substitutions and modifications may be made to some features of the embodiments described above, and any modifications, equivalent alterations and the like, which are within the spirit and principle of the present invention, are intended to be included in the scope of the present invention.
Claims (5)
1. A detection and protection circuit of an elevator door lock comprises an elevator control panel, an operation contactor, a band-type brake contactor, a detection relay and a switch series circuit, wherein the switch series circuit comprises a plurality of detection switch groups which are connected in series, each detection switch group comprises at least one hoistway door detection combination switch and at least one car door detection switch, and each detection switch group is connected with a detection point of a door switch circuit in the elevator control panel, meanwhile, the connection point between every two adjacent detection switch groups in the switch series circuit is connected with an alternating current power supply live wire through a normally open contact and the safety switch;
the connection point between the safety switch and the first end of the switch series circuit is connected with a safety circuit detection point in the elevator control panel, and the power supply circuit live wire end of the elevator control panel is also connected with a detection point for detecting the self fault of the relay in the elevator control panel through a normally open contact in the safety relay.
2. The detecting and protecting circuit of an elevator door lock according to claim 1, characterized in that one car door detecting switch in each detecting switch group corresponds to one landing door detecting combination switch, and a connecting point between two adjacent landing door detecting combination switches and car door detecting switches in the same detecting switch group is connected with a corresponding door switch detecting point in an elevator control panel.
3. The detecting and protecting circuit of the elevator door lock according to claim 1 or 2, characterized in that the switch series circuit comprises a first hall door detecting combination switch, a first car door detecting switch, a second car door detecting switch and a second hall door detecting combination switch which are connected in series in sequence, the first hall door detecting combination switch end in the switch series circuit is connected with the live wire of the alternating current power supply, the second hall door detecting combination switch end is connected with a door switch circuit detecting point for detecting the on-off of the switch series circuit in the elevator control panel through a normally closed contact in the detecting relay, wherein, the connection point between the first hall door detecting combination switch and the first car door detecting switch is connected with a first door switch circuit detecting point in the elevator control panel, the connection point between the second door detecting switch and the second hall door detecting combination switch is connected with a second door switch circuit detecting point in the elevator control panel, the connecting point between first sedan-chair door detection switch and the second sedan-chair door detection switch passes through the first normally open contact in the detection relay and links to each other with the alternating current power supply live wire, and the second hall door detects the connecting point between the normally closed contact in combination switch and the detection relay and also links to each other with the alternating current power supply live wire through the second normally open contact in the detection relay.
4. The detecting and protecting circuit of the elevator door lock according to claim 3, characterized in that the detecting and protecting circuit of the elevator door lock further comprises a running contactor circuit switch and a band-type brake contactor circuit switch controlled by the elevator control panel, wherein one end of the running contactor is connected with a door switch circuit detecting point for detecting the on-off of the switch series circuit in the elevator control panel through the running contactor circuit switch, and the other end is connected with the zero line of the alternating current power supply; one end of the band-type brake contactor is connected with a door switch circuit detection point of the elevator control panel for detecting the on-off of the switch series circuit through a band-type brake contactor circuit switch, and the other end of the band-type brake contactor is connected with an alternating current power supply zero line.
5. The detecting and protecting circuit of the elevator door lock according to claim 4, characterized in that the hall door detecting combination switch is a combination of the hall door detecting switches corresponding to the same car door and connected in series.
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| CN201611261605.1A CN106672765B (en) | 2016-12-30 | 2016-12-30 | Detection and protection circuit of elevator door lock |
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| CN201611261605.1A CN106672765B (en) | 2016-12-30 | 2016-12-30 | Detection and protection circuit of elevator door lock |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107487699A (en) * | 2017-10-17 | 2017-12-19 | 苏州德奥电梯有限公司 | Door lock adhesion detects circuit |
| CN108675076B (en) * | 2018-07-20 | 2023-08-15 | 上海新时达电气股份有限公司 | Door lock short circuit detection device |
| CN110203788A (en) * | 2019-07-02 | 2019-09-06 | 戈尔电梯（天津）有限公司 | A kind of hall door locks breaking locating and detecting device and detection method |
| CN110759198B (en) * | 2019-09-30 | 2021-11-19 | 苏州汇川技术有限公司 | Elevator door lock switch short circuit detection method, system, equipment and storage medium |
| CN111123088A (en) * | 2020-01-04 | 2020-05-08 | 广东卓梅尼技术股份有限公司 | Elevator door lock detection circuit |
| CN113247727B (en) * | 2021-04-15 | 2023-06-13 | 上海新时达电气股份有限公司 | Elevator door loop fault detection device and detection method thereof |
| CN113247728A (en) * | 2021-05-10 | 2021-08-13 | 上海三菱电梯有限公司 | Elevator control detection circuit |
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| CN205294577U (en) * | 2015-11-12 | 2016-06-08 | 北京索德电气工业有限公司 | Device for preventing elevator sedan -chair lock short circuit |
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| 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 |
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| JPH08157158A (en) * | 1994-12-01 | 1996-06-18 | Hitachi Building Syst Eng & Service Co Ltd | Control device of elevator |
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| CN205294577U (en) * | 2015-11-12 | 2016-06-08 | 北京索德电气工业有限公司 | Device for preventing elevator sedan -chair lock short circuit |
| CN205602868U (en) * | 2016-03-30 | 2016-09-28 | 西继迅达（许昌）电梯有限公司 | Novel quick response elevator control system |
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