CN112061913A - Protection device for preventing car from accidentally moving - Google Patents
Protection device for preventing car from accidentally moving Download PDFInfo
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- CN112061913A CN112061913A CN201910494931.4A CN201910494931A CN112061913A CN 112061913 A CN112061913 A CN 112061913A CN 201910494931 A CN201910494931 A CN 201910494931A CN 112061913 A CN112061913 A CN 112061913A
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- relay
- contact
- protection
- leveling
- accidental movement
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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
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
Abstract
The invention discloses a protection device for preventing an elevator car from moving accidentally, which comprises a re-leveling action relay, a re-leveling state relay and an accidental movement protection relay; the leveling action relay is provided with a normally open first action contact and a normally open second action contact; the releveling state relay is provided with a normally closed first state contact; the accidental movement protection relay is provided with a normally open first protection contact and a normally closed second protection contact; the coil of the leveling action relay is connected with an RC delay circuit; the normally open second action contact and the normally closed first state contact which are connected in series form a first branch circuit for controlling a coil of the accidental movement protection relay, and the normally open first protection contact forms a second branch circuit for controlling the coil of the accidental movement protection relay; the normally open first action contact is connected in parallel with two ends of the serially connected landing door state switch and car door state switch. The invention can realize the protection function of preventing the car from moving accidentally, which is required by standards, and has less number of relays and lower cost.
Description
Technical Field
The invention relates to an elevator operation safety technology, in particular to a protection device for preventing an elevator car from moving accidentally.
Background
In the modification No. 1 of the elevator standard GB7588-2003, a requirement regarding a protection (UCMP) device for preventing an accidental movement of a car is added (item 9.11). In the event that the landing doors are not locked and the car doors are not closed, the elevator should have means to prevent or stop movement of the car away from the landing due to the failure of any single component of the drive machine or drive control system upon which the car is dependent for safe operation. The device is able to detect an accidental movement of the car and should arrest the car and keep it stopped.
Generally, the car can only move when the landing and car doors are fully closed. Only when the car is operated in the re-leveling mode can the car move within a small range when the landing door and the car door are opened. Based on the above clauses, when the elevator is running at re-leveling, the movement of the car is beyond the range of re-leveling, a protection stop should be given immediately and cannot be recovered by itself. Further, the operation requirements of the device are in accordance with the regulations for the operation of the electric safety device (clause 14.1.2). The re-leveling zone is a zone with certain allowance left above and below the elevator car sill which is level with the landing sill as the center, and the elevator car can run in the re-leveling zone.
According to the provisions of standard 9.11.4, for elevators using synchronous traction motors, the elevator can be braked by a traction machine brake when the accidental movement of the car is detected; for the elevator using the asynchronous synchronous traction motor, the steel wire rope can be clamped by the rope clamping device to stop the elevator when needed.
At present, various technical means are used to realize the UCMP function, and various UCMP devices are put into use. The relay board shown in fig. 1 is implemented by a combination circuit of 10 relays. There are also electronic systems that are securely certified by SIL3 level functionality. However, these technical means are complicated, which results in high cost of these UCMP devices, and thus, it is a burden for both manufacturers and users.
Disclosure of Invention
The invention aims to provide a protection device for preventing an elevator car from moving accidentally, which can realize the protection function of preventing the elevator car from moving accidentally required by standards, and has the advantages of less number of relays and lower cost.
In order to solve the technical problem, the protection device for preventing the accidental movement of the car comprises a re-leveling action relay 101, a re-leveling state relay 102 and an accidental movement protection relay 103;
a landing door state switch 221 is arranged on the landing door of the elevator, and a car door state switch 222 is arranged on the car door of the elevator;
the landing door state switch 221 is closed when the landing door is closed, and is opened when the landing door is opened;
the car door state switch 222 is closed when the car door is closed and is opened when the car door is opened;
the re-leveling action relay 101 is provided with a normally open first action contact 101.01 and a normally open second action contact 101.02;
the releveling state relay 102 has a normally closed first state contact 102.11;
the accidental movement protection relay 103 has a normally open first protection contact 103.01 and a normally closed second protection contact 103.11;
the positive end of a coil 101.9 of the releveling action relay 101 and the positive end of a coil 102.9 of the releveling state relay 102 are connected with a P1 port;
a capacitor C and a resistor R are connected in series and then connected in parallel at two ends of a coil 101.9 of the re-leveling action relay 101;
the negative end of a coil 102.9 of the re-leveling state relay 102 is used for being connected with the negative of a control power supply;
the negative end of a coil 103.9 of the accidental movement protection relay 103 is connected with the negative end of a control power supply, and the positive end of the coil is connected with a port P2;
the normally open second action contact 101.02 and the normally closed first state contact 102.11 connected in series constitute a first branch for controlling the coil 103.9 of the accidental movement protection relay 103, and the normally open first protection contact 103.01 constitutes a second branch for controlling the coil 103.9 of the accidental movement protection relay 103; the first branch and the second branch are connected between the P2 port and the P3 port in parallel;
the normally open first action contact 101.01 is connected in parallel with two ends of the serially connected landing door state switch 221 and car door state switch 222;
the normally closed second protection contact 103.11, the landing door state switch 221 and the car door state switch 222 are connected in series in the safety loop;
the P3 port is used for connecting a control power supply;
the first controlled switch 20.1, the cage re-leveling position detecting switch 21 and the coil 101.9 of the re-leveling action relay 101 are connected in series in the same loop from the positive control power supply to the negative control power supply.
Preferably, the car re-leveling position detecting switch 21 includes an upper re-leveling detecting switch 211 and a lower re-leveling detecting switch 212;
an upper re-leveling detection switch 211 and a lower re-leveling detection switch 212 are vertically arranged and assembled on the car;
the upper re-leveling detection switch 211 and the lower re-leveling detection switch 212 are turned on when a re-leveling induction plate installed in the hoistway passes through, and turned off when the re-leveling induction plate does not pass through.
Preferably, the normally open first operating contact 101.01 is connected in parallel to two ends of the serially connected landing door state switch 221, car door state switch 222 and normally closed second protection contact 103.11.
Preferably, the first controlled switch 20.1 is a transistor or a relay contact.
Preferably, the first controlled switch 20.1 and the car re-leveling position detecting switch 21 are connected in series between the positive control power supply port P1.
Preferably, the cage re-leveling position detecting switch 21 is connected between the positive control power supply and the port P1;
the first controlled switch 20.1 is connected between the negative terminal of the coil 101.9 of the re-levelling action relay 101 and the control power supply negative.
Preferably, a forward diode 112 is connected between the positive terminal of the coil 101.9 of the re-leveling action relay 101 and the port P1.
Preferably, the two ends of the coil 101.9 of the re-leveling action relay 101, the coil 102.9 of the re-leveling state relay 102 and the coil 103.9 of the accidental movement protection relay 103 are respectively connected with a reverse diode.
Preferably, the re-leveling action relay 101 and the accidental movement protection relay 103 use safety relays.
Preferably, the protection device 10 for preventing the car from moving accidentally also comprises a self-detection relay 104 and a second controlled switch 20.2;
the coil 104.9 of the self-detection relay 104 and the second controlled switch 20.2 are connected in series between the port P1 and the control power supply negative;
the self-test relay 104 has a normally open first self-test contact 104.01 and a normally closed second self-test contact 104.11;
the releveling action relay 101 also has a normally closed third action contact 101.12;
the normally closed second self-testing normally closed contact 104.11 is connected in series with the normally open first protection contact 103.01 to form a second branch circuit for controlling the coil 103.9 of the accidental movement protection relay 103;
the normally open first self-test contact 104.01 and the normally closed third action contact 101.12 of the releveling action relay 101 are connected in series to form a third branch circuit for controlling the coil 103.9 of the accidental movement protection relay 103;
the first branch, the second branch and the third branch are connected between the P2 port and the P3 port in parallel;
the releveling action relay 101 also has a normally closed fourth action contact 101.11;
the releveling state relay 102 also has a normally open second state contact 102.01;
the accidental movement protection relay 103 also has a normally closed third protection contact 103.12;
one end of the normally closed fourth action contact 101.11, the normally open second state contact 102.01 and the normally closed third protection contact 103.12 is connected with a control power supply, and the other end is respectively used as a state signal feedback end of a corresponding relay.
Preferably, the second controlled switch 20.2 is a transistor or a relay contact.
Preferably, the first controlled switch 20.1, the second controlled switch 20.2, and the status signal feedback terminals of the releveling action relay 101, the releveling status relay 102, and the accidental movement protection relay 103 are integrated into a controller 20.
Preferably, the protection device 10 for preventing the accidental movement of the car also comprises a rope clamp 22;
the rope clamping device 22 comprises a rope clamping trigger device 22.1 and a rope clamping state contact 22.2;
the normally closed second protection contact 103.11 of the accidental movement protection relay 103 is connected in series to the control loop of the rope clamping trigger device 22.1 of the rope clamp 22, and the rope clamping state contact 22.2 of the rope clamp 22 is connected in series to the safety loop, so that the normally closed second protection contact 103.11 of the accidental movement protection relay 103 is connected in series to the layer door state switch 221 and the car door state switch 222 in the safety loop.
In the protection device 10 for preventing the car from moving accidentally, the coil 102.9 of the re-leveling state relay 102 and the car re-leveling position detection switch 21 are connected with a circuit between the positive side of the control power supply and the negative side of the control power supply, so the re-leveling state relay 102 directly reflects the position relation of the car and the re-leveling zone, namely, the normally closed first state contact 102.11 of the re-leveling state relay 102 is disconnected when the car is in the re-leveling zone, the re-leveling state relay 102 is released when the car is outside the re-leveling zone, and the normally closed first state contact 102.11 is attracted. When the car moves accidentally to leave the releveling zone (the upper releveling detection switch 211 and the lower releveling detection switch 212 are both off), even if the first controlled switch 20.1 is still kept on due to a fault, the coil 101.9 of the releveling action relay 101 is still powered off, the normally open first action contact 101.01 is disconnected, the safety loop is disconnected, and the elevator is suddenly stopped, so that the requirements of UCMP are met. The control power supply is connected to the positive end of a coil 103.9 of the accidental movement protection relay 103 after passing through two parallel branches, a normally open second action contact 101.02 of the releveling action relay 101 and a normally closed first state contact 102.11 of the releveling state relay 102 are connected in series to form a first branch, a normally open first protection contact 103.01 of the accidental movement protection relay 103 forms a second branch, and any branch is conducted to enable the coil 103.9 of the accidental movement protection relay 103 to be electrified, so that after the first branch controlling the coil 103.9 of the accidental movement protection relay 103 is disconnected, the coil 103.9 of the accidental movement protection relay 103 is still electrified, and therefore, the normally closed second protection contact 103.11 in the safety loop is always disconnected, and even if the landing door state switch 221 and the car door state switch 222 are both closed, the safety loop can still not be recovered to be conducted; when the landing door and the car door are closed, the normally open first action contact 101.01 and the normally closed second protection contact 103.11 are kept open, the safety loop is always open after the car unexpectedly moves and suddenly stops, the safety loop cannot automatically recover, and the 'non-self-recovery' requirement of the UCMP can be met. The protection device 10 for preventing the car from moving accidentally can realize the protection (UCMP) function of preventing the car from moving accidentally, and has the advantages of less using relays and lower cost.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the present invention are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a prior art relay printing plate for implementing the UCMP function;
fig. 2 is a schematic view of a first embodiment of the protection device for preventing accidental movement of the car according to the present invention;
fig. 3 is a schematic view of a second embodiment of the protection device for preventing accidental movement of the car according to the invention;
fig. 4 is a schematic view of a third embodiment of the protection device for preventing the car from moving accidentally.
Description of the reference numerals
10 protection devices to prevent accidental movement of the car; 101 a re-leveling action relay; 101.01 normally open first action contact; 101.02 normally open the second action contact; 101.12 normally close the third moving contact; 101.11 normally close the fourth moving contact; 101.9 coil of the re-leveling action relay; 102 rebalancing state relay; 102.11 normally close the first state contacts; 102.01 normally open second state contacts; 102.9 coil of the releveling state relay; 103 accidentally moving the protective relay; 103.01 normally open the first protection contact; 103.11 normally close the second protection contact; 103.12 normally close the third protection contact; 103.9 accidentally moving the coil of the protective relay; 104 a self-test relay; 104.01 normally open the first self-test contact; 104.11 normally closes the second self-test contact; 104.9 coil of self-test relay; 112 diode; 21 lift car releveling position detection switch; 211 upper re-leveling detection switch; 212 lower re-leveling detection switch; 221 floor door state switches; 222 a door status switch; 20 a controller; 20.1 a first controlled switch; 20.2 a second controlled switch; 22 a rope clamp; 22.1 a rope clamping trigger device; 22.2 pinch rope state contacts.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 2, the protection device 10 for preventing the car from moving accidentally includes a re-leveling action relay 101, a re-leveling state relay 102 and an accidental movement protection relay 103;
a landing door state switch 221 is arranged on the landing door of the elevator, and a car door state switch 222 is arranged on the car door of the elevator;
the landing door state switch 221 is closed when the landing door is closed, and is opened when the landing door is opened;
the car door state switch 222 is closed when the car door is closed and is opened when the car door is opened;
the re-leveling action relay 101 is provided with a normally open first action contact 101.01 and a normally open second action contact 101.02;
the releveling state relay 102 has a normally closed first state contact 102.11;
the accidental movement protection relay 103 has a normally open first protection contact 103.01 and a normally closed second protection contact 103.11;
the positive end of a coil 101.9 of the releveling action relay 101 and the positive end of a coil 102.9 of the releveling state relay 102 are connected with a P1 port;
a capacitor C and a resistor R are connected in series and then connected in parallel at two ends of a coil 101.9 of the re-leveling action relay 101;
the negative end of a coil 102.9 of the re-leveling state relay 102 is used for being connected with the negative of a control power supply;
the negative end of a coil 103.9 of the accidental movement protection relay 103 is connected with the negative end of a control power supply, and the positive end of the coil is connected with a port P2;
the normally open second action contact 101.02 and the normally closed first state contact 102.11 connected in series constitute a first branch for controlling the coil 103.9 of the accidental movement protection relay 103, and the normally open first protection contact 103.01 constitutes a second branch for controlling the coil 103.9 of the accidental movement protection relay 103; the first branch and the second branch are connected between the P2 port and the P3 port in parallel;
the normally open first action contact 101.01 is connected in parallel with two ends of the serially connected landing door state switch 221 and car door state switch 222;
the normally closed second protection contact 103.11, the landing door state switch 221 and the car door state switch 222 are connected in series in the safety loop;
the P3 port is used for connecting a control power supply;
the coils 101.9 of the first controlled switch 20.1, the car re-leveling position detection switch 21 and the re-leveling action relay 101 are connected in series in the same loop between the positive control power supply and the negative control power supply (on the premise of not influencing the control logic of the coil 101.9 of the re-leveling action relay 101, the sequence among the coils 101.9 of the first controlled switch 20.1, the car re-leveling position detection switch 21 and the re-leveling action relay 101 can be adjusted).
Preferably, the car re-leveling position detecting switch 21 includes an upper re-leveling detecting switch 211 and a lower re-leveling detecting switch 212;
an upper re-leveling detection switch 211 and a lower re-leveling detection switch 212 are vertically arranged and assembled on the car;
the upper re-leveling detection switch 211 and the lower re-leveling detection switch 212 are turned on when a re-leveling induction plate installed in the hoistway passes through, and turned off when the re-leveling induction plate does not pass through.
When one of the switches is turned off, it indicates that the car is deviated from the leveling position and the re-leveling operation is required. The reasonable range of re-leveling operation is limited to the upper re-leveling detection switch 211 and the lower re-leveling detection switch 212 having at least one sensing plate passing through, i.e., at least one switch being closed.
Preferably, the normally open first operating contact 101.01 is connected in parallel to two ends of the serially connected landing door state switch 221, car door state switch 222 and normally closed second protection contact 103.11.
Preferably, the first controlled switch 20.1 may be a transistor, a relay contact (on-board relay contact), or the like.
Preferably, the first controlled switch 20.1 and the car re-leveling position detecting switch 21 are connected in series between the positive control power supply port P1.
Preferably, the cage re-leveling position detecting switch 21 is connected between the positive control power supply and the port P1;
the first controlled switch 20.1 is connected between the negative terminal of the coil 101.9 of the re-levelling action relay 101 and the control power supply negative.
The protection device 10 for preventing the car from moving accidentally in the first embodiment realizes the UCMP function by the following modes:
under normal conditions, the elevator control program does not enable the first controlled switch 20.1 to be conducted, then the coil 101.9 of the leveling action relay 101 loses power, the normally open first action contact 101.01 is always disconnected, and the operation of the elevator is not influenced;
when the elevator operates on the second leveling floor, the elevator car leveling position detection switch 21 is switched on (at least one of the upper leveling floor detection switch 211 and the lower leveling floor detection switch 212 is switched on), and after the elevator control program enables the first controlled switch 20.1 to be switched on, the coil 101.9 of the second leveling floor action relay 101 is electrified, so that the normally open first action contact 101.01 is switched on, and the safety loop is switched on again when the landing door state switch 221 and the car door state switch 222 are switched off; meanwhile, the coil 102.9 of the relay 102 in the leveling state is electrified, the normally closed first state contact 102.11 is disconnected, the first branch of the coil 103.9 of the accidental movement protection relay 103 is controlled not to be conducted, the normally open first protection contact 103.01 of the accidental movement protection relay 103 is kept disconnected, the second branch of the coil 103.9 of the accidental movement protection relay 103 is controlled not to be conducted, and therefore the coil 103.9 of the accidental movement protection relay 103 is not electrified;
when the car leaves the re-leveling zone after moving unexpectedly, the car re-leveling position detection switch 21 is switched off (the upper re-leveling detection switch 211 and the lower re-leveling detection switch 212 are both switched off), and the coil 101.9 of the re-leveling action relay 101 is de-energized, so that the normally open first action contact 101.01 is switched off, the safety loop cannot be switched on when the landing door state switch 221 and the car door state switch 222 are switched off, and the elevator can be suddenly stopped; after the emergency stop, the car is inevitably outside the re-leveling zone, the car re-leveling position detection switch 21 is not switched on (the upper re-leveling detection switch 211 and the lower re-leveling detection switch 212 are not restored to the closed state), and the power-off state of the coil 101.9 of the re-leveling action relay 101 is not changed, so that the normally-open first action contact 101.01 is always in the off state;
at the moment that the car moves out of the releveling zone, the coil 102.9 of the releveling state relay 102 loses power, the normally closed first state contact 102.11 is closed, at the moment, the normally open second action contact 101.02 is delayed to be switched off due to the action of the RC circuit, the first branch of the coil 103.9 of the accidental movement protection relay 103 is controlled to be conducted, the coil 103.9 of the accidental movement protection relay 103 is electrified, then the normally open first protection contact 103.01 is attracted, the second branch of the coil 103.9 of the accidental movement protection relay 103 is controlled to be conducted, and the accidental movement protection relay 103 is self-maintained. The coil 103.9 of the accidental movement protection relay 103 is still energized when the first branch controlling the coil 103.9 of the accidental movement protection relay 103 is open. In this way, the normally closed second protection contact 103.11 in the safety circuit is always open, and even if the landing door state switch 221 and the car door state switch 222 are both closed, the safety circuit cannot be restored to conduction;
considering that the normally open first action contact 101.01 and the normally closed second protection contact 103.11 are both kept open, the safety circuit is always open after the car is moved accidentally and is stopped suddenly, and the safety circuit cannot be recovered by self; only when the elevator is powered off again and then powered on, and the accidental movement protection relay 103 loses power due to the fact that the control power supply disappears, the normally-open first protection contact 103.01 is disconnected, two control branches of the coil 103.9 of the accidental movement protection relay 103 are disconnected, the coil 103.9 of the accidental movement protection relay 103 loses power, and the normally-closed second protection contact 103.11 is restored to be closed; after the landing door and the car door are closed, the landing door state switch 221 and the car door state switch 222 are both closed, the safety loop is conducted again, and the elevator resumes operation.
In the protection device 10 for preventing the car from moving accidentally according to the first embodiment, the coil 102.9 of the releveling state relay 102 and the car releveling position detection switch 21 are connected in a circuit from the positive side of the control power supply to the negative side of the control power supply, so that the releveling state relay 102 directly reflects the position relationship between the car and the releveling region, namely, the normally closed first state contact 102.11 of the releveling state relay 102 is disconnected when the car is in the releveling region, the releveling state relay 102 is released when the car is outside the releveling region, and the normally closed first state contact 102.11 is attracted. When the car moves accidentally to leave the releveling zone (the upper releveling detection switch 211 and the lower releveling detection switch 212 are both off), even if the first controlled switch 20.1 is still kept on due to a fault, the coil 101.9 of the releveling action relay 101 is still powered off, the normally open first action contact 101.01 is disconnected, the safety loop is disconnected, and the elevator is suddenly stopped, so that the requirements of UCMP are met. The control power supply is connected to the positive end of a coil 103.9 of the accidental movement protection relay 103 after passing through two parallel branches, a normally open second action contact 101.02 of the releveling action relay 101 and a normally closed first state contact 102.11 of the releveling state relay 102 are connected in series to form a first branch, a normally open first protection contact 103.01 of the accidental movement protection relay 103 forms a second branch, and any branch is conducted to enable the coil 103.9 of the accidental movement protection relay 103 to be electrified, so that after the first branch controlling the coil 103.9 of the accidental movement protection relay 103 is disconnected, the coil 103.9 of the accidental movement protection relay 103 is still electrified, and therefore, the normally closed second protection contact 103.11 in the safety loop is always disconnected, and even if the landing door state switch 221 and the car door state switch 222 are both closed, the safety loop can still not be recovered to be conducted; when the landing door and the car door are closed, the normally open first action contact 101.01 and the normally closed second protection contact 103.11 are kept open, the safety loop is always open after the car unexpectedly moves and suddenly stops, the safety loop cannot automatically recover, and the 'non-self-recovery' requirement of the UCMP can be met. The protection device 10 for preventing the car from moving accidentally in the first embodiment can realize the protection (UCMP) function for preventing the car from moving accidentally, and has the advantages of fewer relays and lower cost.
Example two
According to the protection device 10 for preventing the car from moving accidentally in the first embodiment, a forward diode 112 is connected between the positive end of the coil 101.9 of the re-leveling action relay 101 and the port P1, and is used for slightly delaying the release action of the relay 101 after the coil 101.9 of the re-leveling action relay 101 is de-energized.
Preferably, the two ends of the coil 101.9 of the re-leveling action relay 101, the coil 102.9 of the re-leveling state relay 102 and the coil 103.9 of the accidental movement protection relay 103 are respectively connected with a reverse diode as a follow current circuit after power failure.
Preferably, the releveling action relay 101 and the accidental movement protection relay 103 use safety relays (e.g., safety relays model G7SA-2A2B by OMRON). The safety relay is composed of several relays and circuits, so as to complement each other's abnormal defects, achieve the complete function of relay with correct and low malfunction, and make the lower the malfunction and failure value, the higher the safety factor, therefore, it is necessary to design various safety relays to protect machines of different grades, and the main objective is to protect the operators of machines exposed to risks of different grades. The so-called "safety relay" is not a "relay without fault", but a "safety relay" which performs regular action when a fault occurs, and has a structure of forcibly guiding a contact, and can ensure safety even if a contact fusion phenomenon occurs, which is completely different from a general relay. The safety relay is a necessary control part in a safety loop, receives safety input, and outputs a switch signal to a control loop of equipment in a deterministic manner through judgment of an internal loop. In short, the safety relays are of a double-channel signal type, and the safety relays can normally work only when the signals of the two channels are normal; in the working process, as long as any one channel signal is disconnected, the safety relay stops outputting until the two channel signals are normal and can not normally work after being reset.
EXAMPLE III
According to the first embodiment, as shown in fig. 3, the protection device 10 for preventing the car from moving accidentally further comprises a self-detection relay 104 and a second controlled switch 20.2;
the coil 104.9 of the self-detection relay 104 and the second controlled switch 20.2 are connected in series between the port P1 and the control power supply negative;
the self-test relay 104 has a normally open first self-test contact 104.01 and a normally closed second self-test contact 104.11;
the releveling action relay 101 also has a normally closed third action contact 101.12;
the normally closed second self-testing normally closed contact 104.11 is connected in series with the normally open first protection contact 103.01 to form a second branch circuit for controlling the coil 103.9 of the accidental movement protection relay 103;
the normally open first self-test contact 104.01 and the normally closed third action contact 101.12 of the releveling action relay 101 are connected in series to form a third branch circuit for controlling the coil 103.9 of the accidental movement protection relay 103;
the first branch, the second branch and the third branch are connected between the P2 port and the P3 port in parallel;
the releveling action relay 101 also has a normally closed fourth action contact 101.11;
the releveling state relay 102 also has a normally open second state contact 102.01;
the accidental movement protection relay 103 also has a normally closed third protection contact 103.12;
one end of the normally closed fourth action contact 101.11, the normally open second state contact 102.01 and the normally closed third protection contact 103.12 is connected with a control power supply, and the other end is respectively used as a state signal feedback end of a corresponding relay.
Preferably, the second controlled switch 20.2 is a transistor, a relay contact (on-board relay contact) or the like.
Preferably, the first controlled switch 20.1, the second controlled switch 20.2, and the status signal feedback terminals of the releveling action relay 101, the releveling status relay 102, and the accidental movement protection relay 103 are integrated into a controller 20.
In the protection device 10 for preventing the accidental movement of the car in the third embodiment, because the accidental movement protection relay 103 is not operated before the accidental movement fault of the car does not occur, the new self-detection relay 104 is used for detecting the relay in a normal state, and the operation of the self-detection relay 104 is controlled by the second controlled switch 20.2 only when the car is in a re-leveling zone. When the elevator starts and exits the re-leveling operation, the action change of the re-leveling action relay 101 is caused, and the elevator control program can recognize whether the re-leveling action relay 101 has faults (such as coil failure, normally open contact adhesion, normally closed contact adhesion and the like) according to the state change feedback of the normally closed fourth action contact 101.11 of the re-leveling action relay 101. When the elevator normally runs, the action change of the releveling state relay 102 can be caused when the elevator car enters or exits the releveling position, and whether faults (such as coil failure, adhesion of normally open contacts, adhesion of normally closed contacts and the like) exist in the releveling state relay 102 or not can be identified according to the state change feedback of the normally open second state contact 102.01 of the releveling state relay 102 in an elevator control program. The elevator control program recognizes whether there is a fault (e.g., coil failure, NO contact sticking, NC contact sticking, etc.) in the accidentally moved protective relay 103 based on the state change feedback of the normally closed third protective contact 103.12. If the elevator control program detects the fault of the relay, the elevator operation is stopped, and fault information is prompted.
In the protection device 10 for preventing the car from moving accidentally according to the third embodiment, when the elevator stops at the floor and opens the door, the elevator control program controls the second controlled switch 20.2 to be turned on for a period of time (not exceeding the door opening action time), the coil 104.9 of the self-detection relay 104 is electrified, the normally open first self-detection contact 104.01 of the self-detection relay 104 is closed, and the elevator does not run on the floor again at the moment, so that the normally closed third action contact 101.12 of the floor re-leveling action relay 101 is also closed, and the third branch of the coil 103.9 of the accidental movement protection relay 103 is controlled to be turned on, so that the accidental movement protection relay 103 is attracted; after the second controlled switch 20.2 is switched off, the coil 104.9 of the self-detection relay 104 loses power, the normally open first self-detection contact 104.01 of the self-detection relay 104 is switched off, the third branch of the coil 103.9 of the accidental movement protection relay 103 is controlled to be switched off, the normally closed second self-detection contact 104.11 of the self-detection relay 104 is still in a switched-off state at the beginning of the action of the self-detection relay 104, the closing of the normally open first protection contact 103.01 in the second branch cannot play a self-holding role, the coil 103.9 of the accidental movement protection relay 103 loses power, and the accidental movement protection relay 103 is released. Because the power supply of the self-detection relay 104 is controlled by the car re-leveling position detection switch 21 (the upper re-leveling detection switch 211 and the lower re-leveling detection switch 212), the elevator is ensured not to be suddenly stopped due to the false action of self-detection in the normal operation of the elevator. The normally closed third action contact 101.12 of the re-leveling action relay 101 is connected in series in the third branch, so that self-detection is ensured to be carried out only before the car is in a re-leveling zone and re-leveling action is not started, and the protection (UCMP) function misoperation for preventing the car from moving accidentally caused by accidental self-detection during re-leveling operation is prevented.
Example four
According to embodiments one to three, as shown in fig. 4, the protection device 10 for preventing the car from moving accidentally further includes a rope clamp 22;
the rope clamping device 22 comprises a rope clamping trigger device 22.1 and a rope clamping state contact 22.2;
the normally closed second protection contact 103.11 of the accidental movement protection relay 103 is connected in series to the control loop of the rope clamping trigger device 22.1 of the rope clamp 22, and the rope clamping state contact 22.2 of the rope clamp 22 is connected in series to the safety loop, so that the normally closed second protection contact 103.11 of the accidental movement protection relay 103 is connected in series to the layer door state switch 221 and the car door state switch 222 in the safety loop.
The protection device 10 for preventing the accidental movement of the car is suitable for the elevator with a gear tractor, after the car is accidentally moved, the normally closed second protection contact 103.11 of the accidental movement protection relay 103 is disconnected to trigger the rope clamp 22 to act, and the safety circuit is synchronously disconnected through the rope clamping state contact 22.2, so that the elevator is stopped, and the rope clamp 22 cannot automatically recover once triggered.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (13)
1. A protection device for preventing an elevator car from moving accidentally is characterized by comprising a re-leveling action relay (101), a re-leveling state relay (102) and an accidental movement protection relay (103);
a landing door state switch (221) is arranged on the landing door of the elevator, and a car door state switch (222) is arranged on the car door of the elevator;
the landing door state switch (221) is closed when the landing door is closed and is opened when the landing door is opened;
the car door state switch (222) is closed when the car door is closed and is opened when the car door is opened;
the leveling action relay (101) is provided with a normally open first action contact (101.01) and a normally open second action contact (101.02);
the releveling state relay (102) has a normally closed first state contact (102.11);
the accidental movement protection relay (103) is provided with a normally open first protection contact (103.01) and a normally closed second protection contact (103.11);
the positive end of a coil (101.9) of the releveling action relay (101) and the positive end of a coil (102.9) of the releveling state relay (102) are connected with a port P1;
a capacitor and a resistor are connected in series and then connected in parallel at two ends of a coil (101.9) of the re-leveling action relay (101);
the negative end of a coil (102.9) of the re-leveling state relay (102) is used for being connected with the negative of a control power supply;
the negative end of a coil (103.9) of the accidental movement protection relay (103) is connected with the negative end of a control power supply, and the positive end is connected with a P2 port;
the normally open second action contact (101.02) and the normally closed first state contact (102.11) which are connected in series form a first branch circuit for controlling a coil (103.9) of the accidental movement protection relay (103), and the normally open first protection contact (103.01) forms a second branch circuit for controlling the coil (103.9) of the accidental movement protection relay (103); the first branch and the second branch are connected between the P2 port and the P3 port in parallel;
the normally open first action contact (101.01) is connected in parallel with two ends of the serially connected landing door state switch (221) and car door state switch (222);
the normally closed second protection contact (103.11), the landing door state switch (221) and the car door state switch (222) are connected in series in the safety circuit;
the P3 port is used for connecting a control power supply;
the coils (101.9) of the first controlled switch (20.1), the cage re-leveling position detection switch (21) and the re-leveling action relay (101) are connected in series in the same loop between the positive control power supply and the negative control power supply.
2. The protection device for preventing accidental movement of a car according to claim 1,
the car re-leveling position detection switch (21) comprises an upper re-leveling detection switch (211) and a lower re-leveling detection switch (212);
an upper re-leveling detection switch (211) and a lower re-leveling detection switch (212) are vertically arranged and assembled on the car;
the upper re-leveling detection switch (211) and the lower re-leveling detection switch (212) are turned on when a re-leveling induction plate installed in the hoistway passes through, and are turned off when the re-leveling induction plate does not pass through.
3. The protection device for preventing accidental movement of a car according to claim 1,
the normally open first action contact (101.01) is connected in parallel with two ends of the serially connected landing door state switch (221), car door state switch (222) and normally closed second protection contact (103.11).
4. The protection device for preventing accidental movement of a car according to claim 1,
the first controlled switch (20.1) is a transistor or a relay contact.
5. The protection device for preventing accidental movement of a car according to claim 1,
the first controlled switch (20.1) and the cage re-leveling position detection switch (21) are connected in series between the positive port P1 of the control power supply.
6. The protection device for preventing accidental movement of a car according to claim 1,
the car releveling position detection switch (21) is connected between the positive port P1 of the control power supply;
the first controlled switch (20.1) is connected between the negative terminal of the coil (101.9) of the re-leveling action relay (101) and the control power supply.
7. The protection device for preventing accidental movement of a car according to claim 1,
a forward diode (112) is connected between the positive end of the coil (101.9) of the re-leveling action relay (101) and the port P1.
8. The protection device for preventing accidental movement of a car according to claim 1,
two ends of a coil (101.9) of the releveling action relay (101), a coil (102.9) of the releveling state relay (102) and a coil (103.9) of the accidental movement protection relay (103) are respectively connected with a reverse diode.
9. The protection device for preventing accidental movement of a car according to claim 1,
the safety relay is used for the leveling action relay (101) and the accidental movement protection relay (103).
10. The protection device for preventing accidental movement of a car according to claim 1,
the protection device for preventing the car from moving accidentally also comprises a self-detection relay (104) and a second controlled switch (20.2);
a coil (104.9) of the self-detection relay (104) and a second controlled switch (20.2) are connected in series between the port P1 and the control power supply negative;
the self-detection relay (104) is provided with a normally open first self-test contact (104.01) and a normally closed second self-test contact (104.11);
the leveling action relay (101) is also provided with a normally closed third action contact (101.12);
the normally closed second self-testing normally closed contact (104.11) is connected with the normally open first protection contact (103.01) in series to form a second branch circuit for controlling a coil (103.9) of the accidental movement protection relay (103);
a normally open first self-test contact (104.01) and a normally closed third action contact (101.12) of the releveling action relay (101) are connected in series to form a third branch circuit of a coil (103.9) for controlling the accidental movement protection relay (103);
the first branch, the second branch and the third branch are connected between the P2 port and the P3 port in parallel;
the leveling action relay (101) is also provided with a normally closed fourth action contact (101.11);
the releveling state relay (102) is also provided with a normally open second state contact (102.01);
the accidental movement protection relay (103) is also provided with a normally closed third protection contact (103.12);
one end of the normally closed fourth action contact (101.11), the normally open second state contact (102.01) and the normally closed third protection contact (103.12) is connected with the positive control power supply, and the other end is respectively used as the state signal feedback end of the corresponding relay.
11. The protection device against accidental movement of a car according to claim 10,
the second controlled switch (20.2) is a transistor or a relay contact.
12. The protection device against accidental movement of a car according to claim 10,
the first controlled switch (20.1), the second controlled switch (20.2), and the state signal feedback terminals of the releveling action relay (101), the releveling state relay (102) and the accidental movement protection relay (103) are integrated in a controller (20).
13. The protection device for preventing an accidental movement of a car according to any one of claims 1 to 10,
the protection device for preventing the car from moving accidentally also comprises a rope clamp (22);
the rope clamping device (22) comprises a rope clamping trigger device (22.1) and a rope clamping state contact (22.2);
the normally closed second protection contact (103.11) of the accidental movement protection relay (103) is connected in series with a control loop of a rope clamping trigger device (22.1) of the rope clamp (22), and a rope clamping state contact (22.2) of the rope clamp (22) is connected in series with the safety loop, so that the normally closed second protection contact (103.11) of the accidental movement protection relay (103) is indirectly connected with the door state switch (221) and the car door state switch (222) in series with the safety loop.
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| CN201910494931.4A CN112061913B (en) | 2019-06-10 | 2019-06-10 | Protection device for preventing car from accidentally moving |
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| CN201910494931.4A CN112061913B (en) | 2019-06-10 | 2019-06-10 | Protection device for preventing car from accidentally moving |
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| CN113955612A (en) * | 2021-10-09 | 2022-01-21 | 上海三菱电梯有限公司 | Light curtain safety circuit and emergency rescue device |
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