CN110407039B - Elevator safety loop detection device - Google Patents
Elevator safety loop detection device Download PDFInfo
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- CN110407039B CN110407039B CN201910682124.5A CN201910682124A CN110407039B CN 110407039 B CN110407039 B CN 110407039B CN 201910682124 A CN201910682124 A CN 201910682124A CN 110407039 B CN110407039 B CN 110407039B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/02—Control systems without regulation, i.e. without retroactive action
- B66B1/06—Control systems without regulation, i.e. without retroactive action electric
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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
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- Automation & Control Theory (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses an elevator safety loop detection device which comprises an elevator safety loop, wherein the short circuit condition of a switch can be respectively detected through the change of the series sequence of the elevator safety loop. The device has no bypass electrical switch in the detection process, and the safety loop always keeps an effective state. This device does not have the safety circuit of cutting off any electrical switch at the testing process, and at the testing process, if electrical switch can normally reset, safety circuit can normally switch on.
Description
Technical Field
The invention relates to the field of elevators, in particular to an elevator safety loop detection device.
Background
In the safety circuit of an elevator or an escalator, a plurality of electrical switches are often connected in series to serve as the safety circuit, so that the personal safety of passengers and maintainers is protected. For an independently acting electrical switch, the electrical system can simply detect through the end of the safety circuit and can judge whether the safety switch is short-circuited. However, if two or more electrical switches are operated simultaneously, if one of the electrical switches is shorted separately, the system cannot detect that the switch is shorted through the end of the safety loop. For example, (1) two hydraulic buffers with the same action position are pressed down at the same time, the safety switch on each hydraulic buffer acts simultaneously (2) the electrical switch of the elevator car door and landing door, when the elevator is opened, the two safety switches act simultaneously (3) the safety switches on each speed limiter act simultaneously when the car-side speed limiter and the counterweight-side speed limiter reach the action speed.
At present, the electrical switches of a car door and a landing door of an elevator are respectively detected, and partial patents relate to the detection. As shown in fig. 1, utility model patent 201520459465.3, a detection circuitry of elevator lock, this patent return circuit leading principle be when the elevator flat bed opens the door, actuation 130 relay in the short time, bypass layer door and sedan-chair door contact, the rear end of sedan-chair door lock switch before the sedan-chair door contact is applyed to the direction with safety circuit voltage to this judges whether qianmen sedan-chair lock switch contact is by the short circuit through X26 check point.
The method realizes the function of respectively detecting the contacts of the landing door and the car door by a simpler method. However, the disadvantages of this method are also very significant. When the elevator is opening the door and is leveling, bypass sedan-chair door and layer door contact simultaneously directly switch on the safety circuit of rear side, have huge risk hidden danger.
As shown in fig. 2, the elevator door loop detection device of patent 201810297039.2 of the invention cuts the landing door and car door contacts out of the safety loop through the relay during detection, and sends voltage to the junctions of the landing door and car door contacts, and then detects whether the landing door and car door contacts are short-circuited. This patent is effectual has avoided utility model: 201520459465.3 bypass the safety loop during testing, resulting in the disadvantage of accidental opening of the safety loop.
However, when the contact adhesion of the relay SRD is detected, the safety circuit is always in a forced cut-off state, and the elevator cannot normally operate. The method of the patent introduces a new possibility of failure in the original safety circuit of the elevator. Resulting in a decrease in the reliability of the elevator.
Disclosure of Invention
The invention aims to provide an elevator safety loop detection device, which can continuously ensure that a tested safety switch is connected in series in an original safety loop on the premise of ensuring safety, and the normal action of the safety loop is not influenced.
In order to solve the technical problem, the invention provides an elevator safety loop detection device, which comprises an elevator safety loop, wherein the elevator safety loop comprises a first safety detection circuit, and the first safety detection circuit comprises a first safety switch assembly which comprises a first safety switch combination and a second safety switch combination; the first safety switch combination is connected with the second safety switch combination in series; the first relay circuit comprises a first normally open contact, a second normally open contact, a first normally closed contact, a second normally closed contact and a first relay coil, and the first normally open contact is connected with the first safety switch assembly in series and then connected with the second normally open contact in series; the first normally closed contact is connected with the first safety switch assembly in series and then connected with the first normally closed contact in series; and the first control signal controls the opening and closing of the first and second normally open contacts and the first and second normally closed contacts by controlling the disconnection or the attraction of a first relay coil.
Preferably, the first safety detection circuit further includes: the first end of the first normally open contact and the first end of the first normally closed contact are respectively connected with the input end of the first safety detection circuit; and the second end of the second normally open contact and the second end of the second normally closed contact are respectively connected with the output end of the first safety detection circuit.
Preferably, the first safety detection circuit further includes: the first detection point is arranged between the first safety switch combination and the second safety switch combination; the first detection point is used for detecting voltage.
Preferably, the method further comprises the following steps: a second safety detection circuit comprising a second safety switch assembly comprising a third safety switch combination and a fourth safety switch combination, the third safety switch combination being in series with the fourth safety switch combination; the second safety detection circuit further comprises a second relay circuit, the second relay circuit comprises a third normally open contact, a fourth normally open contact, a third normally closed contact, a fourth normally closed contact and a first relay coil, the third normally open contact is connected with the second safety switch assembly in series and then connected with the fourth normally open contact in series, and the third normally closed contact is connected with the second safety switch assembly in series and then connected with the fourth normally closed contact in series; the second safety detection circuit also comprises a first control signal, and the first control signal controls the opening and closing of the third and fourth normally open contacts and the third and fourth normally closed contacts by controlling the disconnection or the pull-in of a first relay coil; the second safety detection circuit is connected with the first safety detection circuit in series to form a safety detection circuit combination; the third safety detection circuit comprises a fifth normally open contact, a sixth normally open contact, a fifth normally closed contact, a sixth normally closed contact and a second relay coil, wherein the fifth normally open contact is connected with the safety detection circuit in series in a combined mode and then is connected with the sixth normally open contact in series, and the fifth normally closed contact is connected with the safety detection circuit in series in a combined mode and then is connected with the sixth normally closed contact in series; and the second control signal controls the opening and closing of the fifth and sixth normally open contacts and the fifth and sixth normally closed contacts by controlling the opening or the closing of a second relay coil.
Preferably, the elevator safety circuit further comprises an input end and an output end of the elevator safety circuit, and the first end of the fifth normally-open contact and the first end of the fifth normally-closed contact are respectively connected with the input end of the elevator safety circuit; and the second end of the sixth normally-open contact and the second end of the sixth normally-closed contact are respectively connected with the output end of the elevator safety loop.
Preferably, the third safety detection circuit further includes: the second detection point is arranged between the third safety switch combination and the fourth safety switch combination; the second detection point is used for detecting voltage.
Preferably, the first safety switch combination is an elevator car door lock switch.
Preferably, the second safety switch combination is at least one elevator landing door lock switch.
Preferably, the first safety switch combination is an elevator front door lock switch, and the second safety switch combination is an elevator rear door lock switch.
Preferably, the third safety switch combination is an elevator front door layer door lock switch, and the fourth safety switch combination is an elevator rear door layer door lock switch.
Drawings
Fig. 1 is a circuit diagram of a prior art detection circuit for an elevator door lock.
Fig. 2 is a circuit diagram of another prior art elevator door lock detection circuit.
Fig. 3 is a circuit diagram of a safety loop detection device according to a first embodiment of the invention.
Fig. 4-5 are schematic current flow diagrams of the safety loop detection device according to the first embodiment of the present invention under different switch actions.
Fig. 6 is a circuit diagram of a safety loop detection device according to a second embodiment of the present invention.
Fig. 7-8 are schematic current flow diagrams of the safety loop detection device according to the second embodiment of the present invention under different switch actions.
Fig. 9 is a circuit diagram of a safety loop detection device according to a third embodiment of the present invention.
Fig. 10-12 are schematic current flow diagrams of a safety loop detection device according to a third embodiment of the present invention under different switch actions.
Fig. 13 is a circuit diagram of a safety loop detection device according to a fourth embodiment of the present invention.
Fig. 14 to 17 are schematic current flow diagrams of the safety circuit detection device according to the fourth embodiment of the present invention under different switch operation conditions.
Fig. 18 is a circuit diagram of a safety loop detection device according to a fifth embodiment of the present invention.
Fig. 19 to 22 are schematic current flow diagrams of the safety circuit detection device according to the fifth embodiment of the present invention under different switch operation conditions.
Description of the reference numerals
10 first safety detection circuit 11 first safety switch assembly
11.1 first safety switch combination 11.2 second safety switch combination
12 first detection point 13 first relay circuit
13.1 first normally open contact 13.2 second normally open contact
13.3 first normally closed contact 13.4 second normally closed contact
13.5 first Relay coil
20 second safety detection circuit 21 second safety switch assembly
21.1 third safety switch combination 21.2 fourth safety switch combination
22 second detection point 23 second relay circuit
23.1 third normally open contact 23.2 fourth normally open contact
23.3 third normally closed contact 23.4 fourth normally closed contact
30 third safety detection circuit 33.1 fifth normally open contact
33.2 sixth normally open contact 33.3 fifth normally closed contact
33.4 sixth normally closed contact 33.5 second relay coil
50 safety detection circuit combination
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. 3, the present embodiment discloses an elevator safety loop detection device, which includes an elevator safety loop, where the elevator safety loop includes a first safety detection circuit 10, and the first safety detection circuit 10 includes a first safety switch assembly 11, a first relay circuit 13, and a first control signal.
The first safety switch assembly 11 comprises a first safety switch combination 11.1 and a second safety switch combination 11.2; the first safety switch combination 11.1 is connected in series with the second safety switch combination 11.2.
The first relay circuit 13 comprises a first normally open contact 13.1, a second normally open contact 13.2, a first normally closed contact 13.3, a second normally closed contact 13.4 and a first relay coil 13.5, wherein the first normally open contact 13.1 is connected with the first safety switch assembly 11 in series and then connected with the second normally open contact 13.2 in series; the first normally closed contact 13.3 is connected in series with the first safety switch assembly 11 and then connected in series with the first normally closed contact 13.3.
The first control signal controls the first and second normally open contacts and the first and second normally closed contacts to open and close by controlling the power on or power off of the first relay coil 13.5.
The first safety detection circuit 10 further includes: the input end of the first safety detection circuit 10 and the output end of the first safety detection circuit 10, the first end of the first normally open contact 13.1 and the first end of the first normally closed contact 13.3 are respectively connected with the input end of the first safety detection circuit 10; the second end of the second normally open contact 13.2 and the second end of the second normally closed contact 13.4 are respectively connected with the output end of the first safety detection circuit 10.
The first safety detection circuit 10 further includes: and the first detection point 12 is arranged between the first safety switch combination 11.1 and the second safety switch combination 11.2 and is used for detecting voltage.
When the switches of the first safety switch combination 11.1 and the second safety switch combination 11.2 connected in series act simultaneously, the rear stage of the safety circuit loses voltage, and at this time, whether a single-switch short circuit condition exists in the first safety switch combination 11.1 and the second safety switch combination 11.2 cannot be judged through the rear stage voltage of the safety circuit.
At this time, whether the switches of the first safety switch combination 11.1 and the second safety switch combination 11.2 are normally turned off can be respectively judged through the additionally arranged first detection point 12 and the first relay circuit.
When the first control signal controls the first relay coil 13.5 to be disconnected, the current flows to the point shown in fig. 4, and when the first detection point detects voltage, the first safety switch combination 11.1 is in short circuit, and the second safety switch combination 11.2 is not in short circuit.
If the first detection point does not detect the voltage, the first safety switch combination 11.1 is not short-circuited, and the second safety switch combination 11.2 cannot judge whether the short-circuited is generated.
At this time, the first control signal controls the first relay coil 13.5 to pull in, and the current flow of the safety circuit becomes as shown in fig. 5. If the first detection point 12 detects voltage, the second safety switch combination 11.2 is in short circuit, and the whole detection process is completed. If the first detection point 12 does not detect the voltage, the second safety switch combination 11.2 switches are not short-circuited, and the whole detection process is completed.
The device does not bypass any safety switch, and the safety is higher. The device changes the current direction of the safety circuit, can detect the short circuit condition of a single switch, and in the detection process, the safety switch is still connected in series in the safety circuit to ensure the original safety function. Meanwhile, when the device is used for detecting the safety loop, the tested safety switch is continuously ensured to be connected in series in the original safety loop on the premise of ensuring the safety. Even if the relay contact is adhered or can not be attracted, the normal action of the safety loop can not be influenced.
Example two
On the basis of the first embodiment, the first safety switch assembly 11.1 is a car door lock switch, and the second safety switch assembly 11.2 is a landing door lock switch. Further, the floor door lock switch may be plural.
As shown in fig. 6, when the elevator reaches the landing and the door is opened, the car door lock switch and the landing door lock switch connected in series are simultaneously turned off, and the voltage is lost in the rear stage of the safety circuit. At this time, whether the car door lock switch and the landing door lock switch are respectively short-circuited cannot be judged through the rear-stage voltage of the safety loop.
At the moment, whether the car door lock switch and the landing door lock switch are normally disconnected or not can be judged through the first detection point and the relay respectively.
When the first control signal controls the first relay coil 13.5 to be disconnected, the current flows to the position shown in fig. 7, if the voltage is detected at the first detection point, the car door lock switch is in short circuit, and the landing door lock switch is not in short circuit. If the first detection point does not detect the voltage, the car door lock switch is not in short circuit, and the landing door lock switch cannot judge whether the voltage is in short circuit or not.
At this time, the first control signal controls the first relay coil 13.5 to pull in, and the current flow of the safety circuit becomes as shown in fig. 8. And if the first detection point detects the voltage, the layer door lock switch is in short circuit, and the whole detection process is finished. And if the first detection point does not detect the voltage, the layer door lock switch is not short-circuited, and the whole detection process is finished.
EXAMPLE III
On the basis of the first embodiment, the first safety switch combination 11.1 is formed by connecting a front door lock switch and a rear door lock switch in series, and the second safety switch combination 11.2 is formed by connecting a front door lock switch and a rear door lock switch in series. Further, the floor door lock switch may be plural.
As shown in fig. 9, when the elevator arrives at the landing and is opened, if the floor is a front door, the method of the first embodiment can detect whether the door lock switch of the front door car and the door lock switch of the front door landing are short-circuited. If the floor is a back door opening door, whether a back door car door lock switch and a back door floor door lock switch are in short circuit or not can be respectively detected by the method of the first embodiment.
However, if the elevator arrives at a floor where the front door and the rear door are opened simultaneously, it is not possible to detect that the front door lock switch and the rear door lock switch are short-circuited by the method of the first embodiment. Similarly, the situation that the front door layer door lock switch and the rear door layer door lock are in short circuit with any one group cannot be detected. Therefore, the following control method is required for detection. When the elevator arrives at a landing and the passenger instruction of the floor is to open the doors at two sides, the elevator firstly sends a front door opening instruction and the rear door keeps a closed state.
The flow of the safety circuit at this time is as shown in fig. 10. When the first detection point is detected to be at a low level, the back door car door lock switch is in a closed state, so that the situation that the front door is opened, the front door car door lock switch is normally disconnected and is not in short circuit can be judged. When the first detection point is detected to be high level all the time, the short circuit of the front door car door lock switch is judged.
At this time, the first relay coil 13.5 is controlled to pull in, and the safety loop current flows as shown in fig. 11. When the first detection point is detected to be at a low level, the door lock switch of the rear door layer is in a closed state, so that the door lock switch of the front door layer is normally opened and is not in short circuit.
When the first detection point is detected to be at a high level, the front door layer lock switch is in short circuit. The first relay coil 13.5 remains in the pull-in state. The detection of the front door car door lock switch and the layer door lock switch is controlled by the suction state of the relay. The pull-in release speed of the relay is in millisecond level. Therefore, the detection process of the front door car door lock switch and the landing door lock switch only needs about 1 second, at the moment, the front door is opened by dozens of millimeters, and the elevator sends a back door opening command. The front door and the rear door are staggered by tens of millimeters to open the door, so that the passenger does not have any experience influence.
When the front door and the rear door are opened completely, passengers enter and exit the elevator car, and the elevator car is ready to close the door and leave a landing, the elevator firstly sends a front door closing instruction. And after 2 seconds, the elevator sends a back door closing command.
And after the elevator receives the monitoring signal of the closed front door and the rear door is not closed, entering a detection flow of a car door lock and a landing door lock of the rear door.
When the first detection point is detected to be at a low level, the front door lock switch is in a closed state, so that the rear door lock switch is normally disconnected and is not in short circuit.
When the first detection point is detected to be at a high level, the front door lock switch is in a closed state, so that the rear door lock switch is in short circuit.
At this time, the control relay is released and the safety loop current flows as shown in fig. 12: when the first detection point is detected to be at a low level, the front door car door lock switch is in a closed state, so that the rear door lock switch is normally disconnected and is not in short circuit. When the first detection point is detected to be at a high level, the front door car door lock switch is in a closed state, and therefore the rear door lock switch is in short circuit. The detection of the back door car door lock switch and the layer door lock switch only needs about 1 second. The front and rear doors are closed one second apart, without any experience impact on the passengers.
Example four
On the basis of the first embodiment, the elevator safety loop detection device of the present embodiment further includes a second safety detection circuit 20, a third safety detection circuit 30, a second control signal, and a second detection point 22.
The second safety detection circuit 20 comprises a second safety switch assembly 21 comprising a third safety switch combination 21.1 and a fourth safety switch combination 21.2, the third safety switch combination 21.1 being connected in series with the fourth safety switch combination 21.2; the second safety detection circuit 20 further includes a second relay circuit 23, the second relay circuit 23 includes a third normally open contact 23.1, a fourth normally open contact 23.2, a third normally closed contact 23.3, a fourth normally closed contact 23.4 and a first relay coil 13.5, the third normally open contact 23.1 is connected in series with the second safety switch assembly 21 and then connected in series with the fourth normally open contact 23.2, and the third normally closed contact 23.3 is connected in series with the second safety switch assembly 21 and then connected in series with the fourth normally closed contact 23.4; the second safety detection circuit 20 further comprises a first control signal, and the first control signal controls the opening and closing of the third and fourth normally open contacts and the third and fourth normally closed contacts by controlling the opening or closing of the first relay coil 13.5; the second safety detection circuit 20 is connected in series with the first safety detection circuit 10 to form a safety detection circuit assembly 50.
The third safety detection circuit 30 includes a fifth normally open contact 33.1, a sixth normally open contact 33.2, a fifth normally closed contact 33.3, a sixth normally closed contact 33.4 and a second relay coil 33.5, the fifth normally open contact 33.1 is connected in series with the safety detection circuit assembly 50 and then connected in series with the sixth normally open contact 33.2, and the fifth normally closed contact 33.3 is connected in series with the safety detection circuit assembly 50 and then connected in series with the sixth normally closed contact 33.4;
the second control signal controls the opening and closing of the fifth and sixth normally open contacts and the fifth and sixth normally closed contacts by controlling the opening or closing of the second relay coil 33.5.
The second detection point 22 is arranged between the third safety switch combination 21.1 and the fourth safety switch combination 21.2; the second detecting point 22 is used for detecting voltage.
Furthermore, the elevator safety loop detection device further comprises an input end and an output end of an elevator safety loop, and the first end of the fifth normally-open contact 33.1 and the first end of the fifth normally-closed contact 33.3 are respectively connected with the input end of the elevator safety loop; the second end of the sixth normally-open contact 33.2 and the second end of the sixth normally-closed contact 33.4 are respectively connected with the output end of the elevator safety loop.
As shown in fig. 13, when the first to fourth safety switch combinations connected in series act simultaneously, the voltage of the rear stage of the safety circuit is lost, and at this time, it cannot be determined whether the first to fourth safety switch combinations are short-circuited by a single switch through the voltage of the rear stage of the safety circuit. At the moment, whether the first to fourth safety switches are normally disconnected or not can be judged through the first detection point, the second detection point and the relay which are additionally arranged.
When neither the first relay coil 13.5 nor the second relay coil 33.5 is energized, the safety loop current flows as shown in fig. 14. If the first detection point 12 detects a voltage, the first safety switch combination 11.1 is short-circuited. Meanwhile, if the second detection point 22 detects a voltage, both the second safety switch combination 11.2 and the third safety switch combination 21.1 are in short circuit, and if the second detection point does not detect a voltage, all the second safety switch combination 11.2 and the third safety switch combination 21.1 are not in short circuit. If no voltage is detected at the first detection point 12, the first safety switch assembly 11.1 is not shorted. Meanwhile, if the second detection point 22 detects a voltage, the system is abnormal, and if the second detection point 22 does not detect a voltage, the short circuit condition of the second safety switch combination 11.2 and the third safety switch combination 21.1 cannot be judged.
At this time, the control signal controls the first relay coil 13.5 to be attracted and the second relay coil 33.5 not to be attracted, and the current flow of the safety circuit becomes as shown in fig. 15. If the voltage is detected at the second detection point, the switch of the fourth safety switch combination 21.2 is short-circuited. Meanwhile, when the first detection point detects voltage, the switches of the third safety switch combination 21.1 and the second safety switch combination 11.2 are both in short circuit, and when the second detection point does not detect voltage, all the switches of the third safety switch combination 21.1 and the second safety switch combination 11.2 are not in short circuit. And if the voltage is not detected at the second detection point, the switch of the fourth safety switch combination 21.2 is not short-circuited. Meanwhile, if the first detection point detects voltage, the system is abnormal, and if the first detection point does not detect voltage, the short circuit condition of the third safety switch combination 21.1 and the second safety switch combination 11.2 cannot be judged.
At this time, the control signal controls the first relay coil 13.5 to be attracted and the second relay coil 33.5 to be attracted, and the current flow of the safety circuit becomes as shown in fig. 16. If the voltage is detected at the second detection point, the switch of the third safety switch combination 21.1 is short-circuited. Meanwhile, if the first detection point detects voltage, the switches of the fourth safety switch combination 21.2 and the first safety switch combination 11.1 are all in short circuit, and if the second detection point does not detect voltage, all the switches of the fourth safety switch combination 21.2 and the first safety switch combination 11.1 are not in short circuit. And if the voltage is not detected at the second detection point, the switch of the third safety switch combination 21.1 is not short-circuited. Meanwhile, if the first detection point detects voltage, the system is abnormal, and if the first detection point does not detect voltage, the short circuit condition of the fourth safety switch combination 21.2 and the first safety switch combination 11.1 cannot be judged.
At this time, the control signal controls the relay to disengage the first relay coil 13.5 and engage the second relay coil 33.5, and the flow of current in the safety circuit is changed as shown in fig. 17. And if the voltage is detected at the first detection point, the switch of the second safety switch combination 11.2 is short-circuited. Meanwhile, if the second detection point detects voltage, the switches of the first safety switch combination 11.1 and the fourth safety switch combination 21.2 are all in short circuit, and if the second detection point does not detect voltage, all the switches of the first safety switch combination 11.1 and the fourth safety switch combination 21.2 are not in short circuit. And if the voltage is not detected at the first detection point, the switch of the second safety switch combination 11.2 is not short-circuited. Meanwhile, if the second detection point detects voltage, the system is abnormal, and if the second detection point does not detect voltage, the short circuit condition of the first safety switch combination 11.1 and the fourth safety switch combination 21.2 cannot be judged.
Through the change of the series sequence of the four safety loops, the short-circuit condition of the switches of the first safety switch combination 11.1 to the fourth safety switch combination 21.2 can be detected respectively.
The device has no bypass electrical switch in the detection process, and the safety loop always keeps an effective state. This device does not have the safety circuit of cutting off any electrical switch at the testing process, and at the testing process, if electrical switch can normally reset, safety circuit can normally switch on.
EXAMPLE five
On the basis of the fourth embodiment, the first safety switch combination 11.1 is a front door lock switch, the second safety switch combination 11.2 is a rear door lock switch, the third safety switch combination 21.1 is a front door layer lock switch, and the fourth safety switch combination 21.2 is a rear door layer lock switch, and further, a plurality of layer lock switches may be provided.
As shown in fig. 18, when the elevator reaches the leveling zone, the front door and the rear door are opened at the same time, the front door car door lock switch, the rear door car door lock switch, the front door landing door lock switch and the rear door landing door lock switch connected in series are operated at the same time, the rear stage of the safety circuit loses voltage, and at this time, whether the single switch short circuit occurs in the front door car door lock switch, the rear door car door lock switch, the front door landing door lock switch and the rear door landing door lock switch cannot be judged through the rear stage voltage of the safety circuit. At the moment, whether the front door car door lock switch, the rear door car door lock switch, the front door landing door lock switch and the rear door landing door lock switch are normally turned off or not can be judged respectively through the added first detection point and second detection point of the detection points, the first relay coil 13.5 and the second relay coil 33.5.
When neither the first relay coil 13.5 nor the second relay coil 33.5 is energized, the safety loop current flows as shown in fig. 19. And if the first detection point detects the voltage, the switch of the front door car door lock is in short circuit. Meanwhile, if the second detection point detects voltage, the rear door car door lock switch and the front door landing door lock switch are all in short circuit, and if the second detection point does not detect voltage, the rear door car door lock switch and the front door landing door lock switch are not all in short circuit. And if the first detection point does not detect the voltage, the switch of the front door car door lock is not short-circuited. Meanwhile, if the second detection point detects voltage, the system is abnormal, and if the second detection point does not detect voltage, the short circuit condition of the back door car door lock switch and the front door landing door lock switch cannot be judged.
At this time, the control signal controls the first relay coil 13.5 to be attracted and the second relay coil 33.5 not to be attracted, and the current flow direction of the safety circuit becomes as shown in fig. 20. And if the second detection point detects the voltage, the door lock switch of the rear door layer is in short circuit. Meanwhile, if the first detection point detects voltage, the front door landing door lock switch and the rear door car door lock switch are all in short circuit, and if the second detection point does not detect voltage, the front door landing door lock switch and the rear door car door lock switch are not all in short circuit. And if the second detection point does not detect the voltage, the door lock switch of the rear door layer is not in short circuit. Meanwhile, if the first detection point detects voltage, the system is abnormal, and if the first detection point does not detect voltage, the short circuit condition of the front door landing door lock switch and the rear door car door lock switch cannot be judged.
At this time, the control signal controls the relay to pull in the first relay coil 13.5 and pull in the second relay coil 33.5, and the current flow direction of the safety circuit becomes as shown in fig. 21. And if the voltage is detected at the second detection point, the switch of the front door landing door lock is in short circuit. Meanwhile, when the first detection point detects voltage, the rear door layer door lock switch and the front door car door lock switch are all in short circuit, and when the second detection point does not detect voltage, the rear door layer door lock switch and the front door car door lock switch are not all in short circuit. And if the second detection point does not detect the voltage, the switch of the front door layer door lock is not short-circuited. Meanwhile, if the first detection point detects voltage, the system is abnormal, and if the first detection point does not detect voltage, the short circuit condition of a rear door layer door lock switch and a front door car door lock switch cannot be judged.
At this time, the control signal controls the first relay coil 13.5 not to be attracted and the second relay coil 33.5 to be attracted, and the current flow of the safety circuit becomes as shown in fig. 22. And if the first detection point detects the voltage, the back door car door lock switch is in short circuit. Meanwhile, if the second detection point detects voltage, the front door car door lock switch and the rear door layer door lock switch are all in short circuit, and if the second detection point does not detect voltage, the front door car door lock switch and the rear door layer door lock switch are not all in short circuit. And if the first detection point does not detect the voltage, the back door car door lock switch is not short-circuited. Meanwhile, if the second detection point detects voltage, the system is abnormal, and if the second detection point does not detect voltage, the short circuit condition of the front door car door lock switch and the rear door layer door lock switch cannot be judged.
The present invention has been described in detail with reference to the specific embodiments, which are merely the preferred embodiments of the present invention, and the present invention is not limited to the embodiments discussed above. Obvious modifications or alterations based on the teachings of the present invention should also be considered to fall within the technical scope of the present invention. The foregoing detailed description is provided to disclose the best mode of practicing the invention, and also to enable a person skilled in the art to utilize the invention in various embodiments and with various alternatives for carrying out the invention.
Claims (9)
1. An elevator safety circuit detection device, characterized by comprising an elevator safety circuit, the elevator safety circuit comprising a first safety detection circuit (10), the first safety detection circuit (10) comprising:
a first safety switch assembly (11) comprising a first safety switch combination (11.1) and a second safety switch combination (11.2); the first safety switch combination (11.1) is connected in series with the second safety switch combination (11.2);
the safety switch comprises a first relay circuit (13), wherein the first relay circuit (13) comprises a first normally open contact (13.1), a second normally open contact (13.2), a first normally closed contact (13.3) and a second normally closed contact (13.4), and a first relay coil (13.5), and the first normally open contact (13.1) is connected with a first safety switch component (11) in series and then connected with the second normally open contact (13.2) in series; the first normally closed contact (13.3) is connected with the first safety switch component (11) in series and then connected with the second normally closed contact (13.4) in series;
the first control signal controls the opening and closing of the first normally open contact, the second normally open contact, the first normally closed contact and the second normally closed contact by controlling the disconnection or the suction of a first relay coil (13.5);
the first security detection circuit (10) further comprises: the input end of the first safety detection circuit (10) and the output end of the first safety detection circuit (10), the first end of the first normally open contact (13.1) and the first end of the first normally closed contact (13.3) are respectively connected with the input end of the first safety detection circuit (10); and the second end of the second normally open contact (13.2) and the second end of the second normally closed contact (13.4) are respectively connected with the output end of the first safety detection circuit (10).
2. The elevator safety loop detection device according to claim 1, wherein the first safety detection circuit (10) further comprises:
a first detection point (12) arranged between the first safety switch combination (11.1) and the second safety switch combination (11.2); the first detection point (12) is used for detecting voltage.
3. The elevator safety circuit detection device of claim 1, further comprising:
a second safety detection circuit (20), the second safety detection circuit (20) comprising a second safety switch assembly (21) comprising a third safety switch combination (21.1) and a fourth safety switch combination (21.2), the third safety switch combination (21.1) being in series with the fourth safety switch combination (21.2); the second safety detection circuit (20) further comprises a second relay circuit (23), the second relay circuit (23) comprises a third normally open contact (23.1), a fourth normally open contact (23.2), a third normally closed contact (23.3), a fourth normally closed contact (23.4) and a first relay coil (13.5), the third normally open contact (23.1) is connected with the second safety switch assembly (21) in series and then connected with the fourth normally open contact (23.2) in series, and the third normally closed contact (23.3) is connected with the second safety switch assembly (21) in series and then connected with the fourth normally closed contact (23.4) in series; the second safety detection circuit (20) further comprises a first control signal, and the first control signal controls the opening and closing of the third and fourth normally open contacts and the third and fourth normally closed contacts by controlling the opening or the suction of a first relay coil (13.5); the second security detection circuit (20) is connected in series with the first security detection circuit (10) to form a security detection circuit combination (50);
the third safety detection circuit (30) comprises a fifth normally open contact (33.1), a sixth normally open contact (33.2), a fifth normally closed contact (33.3), a sixth normally closed contact (33.4) and a second relay coil (33.5), wherein the fifth normally open contact (33.1) is connected with the safety detection circuit combination (50) in series and then connected with the sixth normally open contact (33.2) in series, and the fifth normally closed contact (33.3) is connected with the safety detection circuit combination (50) in series and then connected with the sixth normally closed contact (33.4) in series;
and the second control signal controls the opening and closing of the fifth and sixth normally open contacts and the fifth and sixth normally closed contacts by controlling the disconnection or the pull-in of a second relay coil (33.5).
4. The elevator safety loop detection device according to claim 3, further comprising an input and an output of an elevator safety loop, wherein the first end of the fifth normally open contact (33.1) and the first end of the fifth normally closed contact (33.3) are connected to the input of the elevator safety loop, respectively; and the second end of the sixth normally-open contact (33.2) and the second end of the sixth normally-closed contact (33.4) are respectively connected with the output end of the elevator safety loop.
5. The elevator safety loop detection device according to claim 4, wherein the third safety detection circuit (30) further comprises:
a second detection point (22) arranged between the third safety switch combination (21.1) and the fourth safety switch combination (21.2); the second detection point (22) is used for detecting voltage.
6. Elevator safety circuit detection device according to one of claims 1 to 5, characterized in that the first safety switch group (11.1) is an elevator car door lock switch.
7. Elevator safety loop detection device according to one of claims 1-5, characterized in that the second safety switch group (11.2) is at least one elevator landing door lock switch.
8. The elevator safety circuit detection device according to one of claims 3 to 5, characterized in that the first safety switch combination (11.1) is an elevator front door lock switch and the second safety switch combination (11.2) is an elevator rear door lock switch.
9. Elevator safety circuit detection device according to one of claims 3-5, characterized in that the third safety switch group (21.1) is an elevator front door lock switch and the fourth safety switch group (21.2) is an elevator rear door lock switch.
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| CN201910682124.5A CN110407039B (en) | 2019-07-26 | 2019-07-26 | Elevator safety loop detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910682124.5A CN110407039B (en) | 2019-07-26 | 2019-07-26 | Elevator safety loop detection device |
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| CN110407039B true CN110407039B (en) | 2021-07-30 |
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| CN113942908B (en) * | 2020-07-16 | 2024-09-20 | 奥的斯电梯公司 | Fault location for landing door safety 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01197291A (en) * | 1988-02-01 | 1989-08-08 | Mitsubishi Electric Corp | Temporary elevator |
| US5107964A (en) * | 1990-05-07 | 1992-04-28 | Otis Elevator Company | Separate elevator door chain |
| CN201258211Y (en) * | 2008-07-10 | 2009-06-17 | 上海三菱电梯有限公司 | Elevator door switch detecting contact short circuit guard device |
| 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 |
| CN106744112B (en) * | 2016-12-27 | 2022-09-09 | 快意电梯股份有限公司 | Detection circuit and detection method for short circuit of elevator door lock loop |
| CN206827844U (en) * | 2017-04-25 | 2018-01-02 | 宁波宏大电梯有限公司 | A kind of anti-short circuit of elevator belt loop of the door lock detects and control device |
| CN106927328A (en) * | 2017-04-25 | 2017-07-07 | 宁波宏大电梯有限公司 | A kind of anti-short circuit detection of elevator belt loop of the door lock and control device and correlation method |
| CN107640671A (en) * | 2017-08-23 | 2018-01-30 | 上海新时达电气股份有限公司 | Door lock short-circuit detecting device |
| CN207566648U (en) * | 2017-12-13 | 2018-07-03 | 杭州西奥电梯有限公司 | A kind of elevator door loop detector of rear opening elevator |
| CN207932818U (en) * | 2018-02-10 | 2018-10-02 | 冯光辉 | Elevator door loop detection circuit |
| CN208802725U (en) * | 2018-07-20 | 2019-04-30 | 上海新时达电气股份有限公司 | Door lock short-circuit detecting device |
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