CN112061914A - Elevator safety loop detection system - Google Patents
Elevator safety loop detection system Download PDFInfo
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- CN112061914A CN112061914A CN201910495668.0A CN201910495668A CN112061914A CN 112061914 A CN112061914 A CN 112061914A CN 201910495668 A CN201910495668 A CN 201910495668A CN 112061914 A CN112061914 A CN 112061914A
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- upper stop
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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
Abstract
The invention discloses an elevator safety loop detection system.A pair of upper stop detection switches with the same logic as a switch is added at a normally open contact upper stop action switch between a working power supply and an access safety loop input end, whether the upper stop action switch is short-circuited or not is judged by monitoring the combined logic of the potential height of an upper stop short-circuit detection point and the potential height of the access safety loop input end, the electrical hidden trouble caused by the accidental short-circuit of the upper stop action switch is eliminated, the safety risk of an access worker in a well is reduced, the accidental short-circuit detection of the upper stop action switch can be realized by simply modifying the original elevator safety loop, the change of the original elevator safety loop is extremely small, and a standard elevator can be quickly modified into an elevator with a function of coping with a short top floor.
Description
Technical Field
The invention relates to an elevator safety technology, in particular to an elevator safety loop detection system.
Background
With the development of cities, high-rise buildings rise frequently, and the use of elevators is more and more popular. With the increasing number of safety accidents caused by elevator equipment failures, elevator functional safety is increasingly emphasized.
At present, the safety system of an elevator adopts an electric safety chain to realize safety control, the safety chain is a safety loop formed by connecting a safety switch and a relay in series, and when any safety switch acts, the safety chain is disconnected, so that the operation of a driver and a brake is forbidden (the brake keeps a contracting brake state). The safety switches in the safety chain are distributed at all positions of the elevator, and some safety switches are in a machine room, such as a main machine emergency stop switch, a control cabinet emergency stop switch, a hall door lock, a speed limiter electric switch and the like; some of the devices are arranged in a lift car, such as a lift car door lock, a lift car top emergency stop switch and the like; some in the hoistway, pit, etc.
According to GB 28621-2012 "new elevator manufacturing and installation safety code installed in existing buildings, this standard allows to use the related art to achieve shallow pits and low floors when adding new elevators or replacing the original elevators in existing buildings. Aiming at the civil engineering characteristics of shallow pits or short top floors of a building shaft, an upper stop device, a lower stop device and a telescopic guardrail are important measures for protecting maintenance personnel in the application of the shallow pits and the short top floors. However, in actual field operation, a maintenance worker can connect the upper stop device, the lower stop device and the action contact of the telescopic guardrail in a short time for debugging conveniently.
In the prior art, there is no technical scheme for preventing electrical hidden troubles and operation accident risks caused by accidental short circuit of the upper stop device, the lower stop device and the action contacts of the telescopic guardrail.
Disclosure of Invention
The invention aims to provide an elevator safety loop detection system, which can reduce the safety risk of operation of maintainers in a hoistway.
The crisis solves the technical problem, and the elevator safety loop detection system provided by the invention comprises an elevator safety loop, a controller and an upper stop detection switch 9;
the elevator safety loop comprises an elevator automatic safety loop and an overhaul safety loop;
an upper stop reset switch 3 is connected in series between the working power supply and the input end of the automatic safety loop of the elevator;
an upper stop action switch 4 is connected in series between the working power supply and the inlet end of the maintenance safety loop;
the upper stop motion switch 4 is a normally open contact and is arranged beside the upper stop device, the upper stop device is provided with a reset position and an effective position, and after the lift car ascends to enable the upper stop device to be arranged at the effective position, the state of the upper stop motion switch 4 is changed into a closed state;
the upper stop reset switch 3 is a normally closed contact which is opposite to the switch logic of the upper stop action switch 4 and is arranged beside the upper stop device, and after the lift car moves upwards to enable the upper stop device to be arranged at the reset position, the state of the upper stop reset switch 3 is changed into off;
the upper stop detection switch 9 is a normally open contact and has the same switch logic as the upper stop action switch 4;
one end of the upper stop detection switch 9 is connected with a detection power supply, and the other end is connected with an upper stop short-circuit detection point;
and when the input end of the maintenance safety loop is at a working high level and the upper stop short circuit detection point is at a detection low level, the controller outputs a short circuit fault signal of the upper stop motion switch 4.
Preferably, the working high level is 50% to 100% of the positive of the working power supply;
detecting the low level to be 0 to 10 percent of the positive of the detection power supply;
the working power supply is positive + 125V;
the power supply is detected to be + 48V.
Preferably, when the input end of the maintenance safety circuit is at a working high level and the upper stop short circuit detection point is at a detection low level, the controller controls the operation of the maintenance safety circuit to be forbidden.
Preferably, when the input end of the automatic safety loop of the elevator is at a working high level and the upper stop short circuit detection point is at a detection high level, the controller outputs a short circuit fault signal of the upper stop reset switch 3.
Preferably, when the input end of the automatic safety loop of the elevator is at a working high level and the upper stop short-circuit detection point is at a detection high level, the controller controls to prohibit the automatic safety loop of the elevator from running.
Preferably, if the processor receives the automatic running state signal of the elevator, the input end of the automatic safety loop of the elevator is at a working high level, and the upper stop short circuit detection point is at a detection high level, the processor outputs a short circuit fault alarm signal of the upper stop detection switch 9.
Preferably, the elevator safety loop detection system further comprises a lower stop detection switch 10;
an upper stop reset switch 3 and a lower stop reset switch 5 are connected in series between the working power supply and the input end of the automatic safety loop of the elevator;
an upper stop action switch 4 and a lower stop action switch 6 are connected in series between the working power supply and the inlet end of the maintenance safety loop;
the lower stop motion switch 6 is a normally open contact and is arranged beside the lower stop device, the lower stop device has two positions, namely a reset position and an effective position, and after the lower stop device is arranged at the effective position, the state of the lower stop motion switch 6 is changed into a closed state;
the lower stop reset switch 5 is a normally closed contact which is opposite to the switch logic of the lower stop action switch 6 and is arranged beside the lower stop device, and when the lift car moves downwards to enable the lower stop device to be arranged at a reset position, the lower stop reset switch 5 is switched off;
the lower stop detection switch 10 is a normally open contact and has the same switch logic as the lower stop action switch 6;
one end of the lower stop detection switch 10 is connected with a detection power supply, and the other end is connected with a lower stop short-circuit detection point;
and when the input end of the maintenance safety loop is at a working high level and the lower stop short circuit detection point is at a detection low level, the controller outputs a short circuit fault signal of the lower stop operating switch 4.
Preferably, when the input end of the maintenance safety loop is at a working high level and the lower stop short circuit detection point is at a detection low level, the controller controls to prohibit the maintenance safety loop from operating.
Preferably, when the input end of the automatic safety loop of the elevator is at a working high level and the lower stop short circuit detection point is at a detection high level, the controller outputs a short circuit fault signal of the upper stop reset switch 3.
Preferably, when the input end of the elevator automatic safety loop is at a working high level and the lower stop short circuit detection point is at a detection high level, the controller controls to prohibit the elevator automatic safety loop from running.
Preferably, if the processor receives the elevator automatic running state signal, the input end of the elevator automatic safety loop is at a working high level, and the lower stop short circuit detection point is at a detection high level, the processor outputs a lower stop detection switch short circuit fault alarm signal.
Preferably, the elevator safety loop detection system further comprises a guardrail detection switch 11;
an upper stop reset switch 3, a lower stop reset switch 5 and a guardrail retraction switch 7 are connected in series between the working power supply and the input end of the automatic safety loop of the elevator;
an upper stop action switch 4, a lower stop action switch 6 and a guardrail extension switch 8 are connected in series between the working power supply and the inlet end of the maintenance safety loop;
the guardrail extension switch 8 is a normally open contact and is arranged beside the car top guardrail, and after the car top guardrail is unfolded, the state of the guardrail extension switch 8 is changed into a closed state;
the guardrail retraction switch 7 is a normally closed contact which is opposite to the switch logic of the guardrail extension switch 8 and is arranged beside the car top guardrail, and when the car top guardrail is unfolded, the state of the guardrail retraction switch 7 is changed into off;
the guardrail detection switch 11 is a normally open contact and has the same logic as the guardrail extension switch 8;
one end of the guardrail detection switch 11 is connected with a detection power supply, and the other end is connected with a guardrail short-circuit detection point;
and when the input end of the maintenance safety loop is at a working high level and the guardrail short circuit detection point is at a detection low level, the controller outputs a short circuit fault signal of the guardrail extension switch 8.
Preferably, when the input end of the maintenance safety loop is at a working high level and the guardrail short-circuit detection point is at a detection low level, the controller controls the operation of the maintenance safety loop to be forbidden.
Preferably, the elevator safety circuit further comprises an emergency electric operation circuit;
an upper stop reset switch 3 and a lower stop reset switch 5 are connected in series between the working power supply and the input end of the emergency electric operation loop;
the guardrail retracting switch 7 is connected between the input end of the emergency electric operation loop and the input end of the automatic safety loop of the elevator.
Preferably, when the input end of the automatic safety loop of the elevator is at a working high level and the guardrail short-circuit detection point is at a detection high level, the controller outputs a short-circuit fault signal of the guardrail retraction switch 7.
Preferably, when the input end of the automatic safety loop of the elevator is at a working high level and the guardrail short-circuit detection point is at a detection high level, the controller controls and prohibits the automatic safety loop of the elevator from running.
Preferably, if the processor receives the automatic running state signal of the elevator, the input end of the automatic safety loop of the elevator is at a working high level, and the guardrail short-circuit detection point is at a detection high level, the processor outputs a short-circuit fault alarm signal of the guardrail detection switch 11.
Preferably, a safety system reset switch 1 is connected in series between the working power supply and the input end of the automatic safety loop of the elevator;
a safety system action switch 2 is connected in series between the working power supply and the inlet end of the maintenance safety loop.
Preferably, the safety system action switch 2 and the safety system reset switch 1 are both normally open switches, and are closed when triggered by a user.
Preferably, the safety system reset switch 1 and the safety system operation switch 2 are installed at the lowermost layer of the elevator.
The elevator safety loop detection system is characterized in that a pair of upper stop detection switches 9 with the same switch logic is added at the upper stop action switch 4 of a normally open contact between a working power supply and the input end of an overhaul safety loop, and whether the upper stop action switch 4 is short-circuited or not is judged by monitoring the combined logic of the potential height of an upper stop short-circuit detection point and the potential height of the input end of the overhaul safety loop (whether the overhaul safety loop is connected or not). As shown in fig. 2, when the contact of the upper stop motion switch 4 is disconnected and accidentally short-circuited, the input end of the maintenance safety loop is connected with a working power supply, the input end of the maintenance safety loop is at a working high level, meanwhile, the upper stop detection switch 9 is in a disconnected state, the upper stop short-circuit detection point is at a detection low level, at this time, the controller judges that the upper stop motion switch 4 is accidentally short-circuited, the controller reports the short-circuit fault of the upper stop motion switch 4 and can prohibit the maintenance safety loop from running, electrical hidden troubles caused by the accidental short circuit of the upper stop motion switch 4 are eliminated, and the safety risk of operation of a maintenance worker in a hoistway is reduced. The elevator safety circuit detecting system of embodiment one only needs simply to modify original elevator safety circuit and can realize stopping action switch 4 unexpected short circuit detection, and is minimum to the change of original elevator safety circuit, can be quick reform transform the standard elevator into the elevator that corresponds short top layer function.
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 schematic structural view of an embodiment of an elevator safety loop detection system of the invention;
FIG. 2 is a schematic diagram of an accidental short circuit of an upper stop motion switch in an embodiment of the elevator safety loop detection system of the present invention;
FIG. 3 is an accidental short circuit schematic diagram of an upper stop reset switch in an embodiment of the elevator safety loop detection system of the present invention;
fig. 4 is an accidental short circuit diagram of an upper stop detection switch in an embodiment of the elevator safety loop detection system of the invention.
The reference numerals are explained below:
1 safety system reset switch; 2 safety system action switch; 3 stopping the reset switch; 4 stopping the action switch; 5, a lower stop reset switch; 6 lower stop action switch; 7, a guardrail retraction switch; 8, a guardrail extension switch; 9 stop detection switch; 10 lower stop detection switch; 11 guardrail detection switch.
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
The elevator safety loop detection system comprises an elevator safety loop, a controller and an upper stop detection switch 9;
the elevator safety loop comprises an elevator automatic safety loop and an overhaul safety loop;
an upper stop reset switch 3 is connected in series between the working power supply and the input end of the automatic safety loop of the elevator;
an upper stop action switch 4 is connected in series between the working power supply and the inlet end of the maintenance safety loop;
the upper stop motion switch 4 is a normally open contact and is arranged beside the upper stop device, the upper stop device is provided with a reset position and an effective position, and after the lift car ascends to enable the upper stop device to be arranged at the effective position, the state of the upper stop motion switch 4 is changed into a closed state;
the upper stop reset switch 3 is a normally closed contact which is opposite to the switch logic of the upper stop action switch 4 and is arranged beside the upper stop device, and after the lift car moves upwards to enable the upper stop device to be arranged at the reset position, the state of the upper stop reset switch 3 is changed into off;
the upper stop detection switch 9 is a normally open contact and has the same switch logic as the upper stop action switch 4;
one end of the upper stop detection switch 9 is connected with a detection power supply, and the other end is connected with an upper stop short-circuit detection point;
and when the input end of the maintenance safety loop is at a working high level and the upper stop short circuit detection point is at a detection low level, the controller outputs a short circuit fault signal of the upper stop motion switch 4.
The working high level can be 50% to 100% of the positive of the working power supply;
the detection low level may be 0 to 10% of the detection power supply positive;
the working power supply can be + 125V;
the detection power supply can be + 48V.
Preferably, when the input end of the maintenance safety circuit is at a working high level and the upper stop short circuit detection point is at a detection low level, the controller controls the operation of the maintenance safety circuit to be forbidden.
When the maintainer gets into the well, only when the upper stop device is arranged at an effective position, namely the state of the upper stop action switch 4 is changed into closed, the elevator can be overhauled and operated. In the building well with the civil engineering characteristic of the short top floor, the upper stop device provides extra danger avoiding space for maintainers in the well, and the maintainers operating in the well are protected.
In the elevator safety loop detection system according to the first embodiment, a pair of upper stop detection switches 9 having the same switch logic as the upper stop detection switches are added to the upper stop action switch 4 at the normally open contact between the working power supply and the access safety loop input end, and whether the upper stop action switch 4 is short-circuited or not is determined by monitoring the combination logic of the potential level of the upper stop short-circuit detection point and the potential level of the access safety loop input end (whether the access safety loop is on or not). As shown in fig. 2, when the contact of the upper stop motion switch 4 is disconnected and accidentally short-circuited, the input end of the maintenance safety loop is connected with a working power supply, the input end of the maintenance safety loop is at a working high level, meanwhile, the upper stop detection switch 9 is in a disconnected state, the upper stop short-circuit detection point is at a detection low level, at this time, the controller judges that the upper stop motion switch 4 is accidentally short-circuited, the controller reports the short-circuit fault of the upper stop motion switch 4 and can prohibit the maintenance safety loop from running, electrical hidden troubles caused by the accidental short circuit of the upper stop motion switch 4 are eliminated, and the safety risk of operation of a maintenance worker in a hoistway is reduced. The elevator safety circuit detecting system of embodiment one only needs simply to modify original elevator safety circuit and can realize stopping action switch 4 unexpected short circuit detection, and is minimum to the change of original elevator safety circuit, can be quick reform transform the standard elevator into the elevator that corresponds short top layer function.
Example two
Based on the elevator safety loop detection system of the first embodiment, when the input end of the elevator automatic safety loop is at the working high level and the upper stop short circuit detection point is at the detection high level, the controller outputs the short circuit fault signal of the upper stop reset switch 3.
Preferably, when the input end of the automatic safety loop of the elevator is at a working high level and the upper stop short-circuit detection point is at a detection high level, the controller controls to prohibit the automatic safety loop of the elevator from running.
In the building well of the civil engineering characteristics of short top layer, the top stop device gives the maintainer extra danger-avoiding space in the well, and protects the maintainer operating in the well. After the overhaul operation is completed by the maintainer, the upper stop device needs to be reset, and the elevator can be allowed to recover the automatic operation after the maintainer leaves the hoistway.
In the elevator safety circuit detection system of the second embodiment, a pair of upper stop detection switches 9 with a switch logic opposite to that of the upper stop reset switch 3 is added at the normally closed contact upper stop reset switch 3, and because the switch logics of the upper stop reset switch 3 and the upper stop action switch 4 are opposite, the upper stop reset switch 3 and the upper stop action switch 4 can share a pair of upper stop detection switches 9. The elevator safety loop detection system of the second embodiment judges whether the upper stop reset switch 3 is short-circuited by monitoring the combination logic of the potential level of the upper stop short-circuit detection point and the potential level of the input end of the elevator automatic safety loop (whether the elevator automatic safety loop is connected or not). As shown in fig. 3, when the contact of the upper stop reset switch 3 is disconnected and is accidentally shorted, the input end of the automatic safety loop of the elevator is connected with a working power supply, the input end of the automatic safety loop of the elevator is at a working high level, meanwhile, the upper stop detection switch 9 is in a closed state, and the upper stop short-circuit detection point is at a detection high level, at this time, the controller judges that the upper stop reset switch 3 is accidentally shorted, the controller reports the short-circuit fault of the upper stop reset switch 3 and can prohibit the automatic safety loop of the elevator from running, thereby eliminating the electrical hidden trouble caused by the accidental shorting of the upper stop reset switch 3 and reducing the safety risk of the operation of the maintainer in the hoistway.
EXAMPLE III
Based on the elevator safety loop detection system of the second embodiment, if the processor receives the automatic running state signal of the elevator, the input end of the automatic safety loop of the elevator is at the working high level, and the upper stop short circuit detection point is at the detection high level, the processor outputs a short circuit fault alarm signal of the upper stop detection switch 9.
The elevator safety circuit detection system of the third embodiment can perform self-detection of a short-circuit fault of the top stop detection switch 9 as shown in fig. 4.
Example four
Based on the first, second or third embodiment, the elevator safety loop detection system further comprises a lower stop detection switch 10;
an upper stop reset switch 3 and a lower stop reset switch 5 are connected in series between the working power supply and the input end of the automatic safety loop of the elevator;
an upper stop action switch 4 and a lower stop action switch 6 are connected in series between the working power supply and the inlet end of the maintenance safety loop;
the lower stop motion switch 6 is a normally open contact and is arranged beside the lower stop device, the lower stop device has two positions, namely a reset position and an effective position, and after the lower stop device is arranged at the effective position, the state of the lower stop motion switch 6 is changed into a closed state;
the lower stop reset switch 5 is a normally closed contact which is opposite to the switch logic of the lower stop action switch 6 and is arranged beside the lower stop device, and when the lift car moves downwards to enable the lower stop device to be arranged at a reset position, the lower stop reset switch 5 is switched off;
the lower stop detection switch 10 is a normally open contact and has the same switch logic as the lower stop action switch 6;
one end of the lower stop detection switch 10 is connected with a detection power supply, and the other end is connected with a lower stop short-circuit detection point;
and when the input end of the maintenance safety loop is at a working high level and the lower stop short circuit detection point is at a detection low level, the controller outputs a short circuit fault signal of the lower stop operating switch 4.
Preferably, when the input end of the maintenance safety loop is at a working high level and the lower stop short circuit detection point is at a detection low level, the controller controls to prohibit the maintenance safety loop from operating.
In the building well with the civil engineering characteristic of the shallow pit, the lower stop device provides extra danger avoiding space for maintainers in the well, and the maintainers operating in the well are protected. After the overhaul operation is completed by the overhaul personnel, the lower stop device needs to be reset, and the elevator can be allowed to recover the automatic operation after the overhaul personnel leave the hoistway.
In the elevator safety circuit detection system according to the fourth embodiment, the inspection safety circuit can be operated only when both the upper stop operation switch 4 and the lower stop operation switch 6 are closed.
EXAMPLE five
Based on the elevator safety loop detection system of the fourth embodiment, when the input end of the elevator automatic safety loop is at the working high level and the lower stop short circuit detection point is at the detection high level, the controller outputs the short circuit fault signal of the upper stop reset switch 3.
Preferably, when the input end of the elevator automatic safety loop is at a working high level and the lower stop short circuit detection point is at a detection high level, the controller controls to prohibit the elevator automatic safety loop from running.
EXAMPLE six
Based on the elevator safety loop detection system of the fifth embodiment, if the processor receives the automatic running state signal of the elevator, the input end of the automatic safety loop of the elevator is at the working high level, and the lower stop short-circuit detection point is at the detection high level, the processor outputs the short-circuit fault alarm signal of the lower stop detection switch.
The elevator safety loop detection system of the sixth embodiment can perform self-detection of the short-circuit fault of the lower stop detection switch 10.
EXAMPLE seven
Based on the fourth, fifth or sixth embodiment, the elevator safety loop detection system further comprises a guardrail detection switch 11;
an upper stop reset switch 3, a lower stop reset switch 5 and a guardrail retraction switch 7 are connected in series between the working power supply and the input end of the automatic safety loop of the elevator;
an upper stop action switch 4, a lower stop action switch 6 and a guardrail extension switch 8 are connected in series between the working power supply and the inlet end of the maintenance safety loop;
the guardrail extension switch 8 is a normally open contact and is arranged beside the car top guardrail, and after the car top guardrail is unfolded, the state of the guardrail extension switch 8 is changed into a closed state;
the guardrail retraction switch 7 is a normally closed contact which is opposite to the switch logic of the guardrail extension switch 8 and is arranged beside the car top guardrail, and when the car top guardrail is unfolded, the state of the guardrail retraction switch 7 is changed into off;
the guardrail detection switch 11 is a normally open contact and has the same logic as the guardrail extension switch 8;
one end of the guardrail detection switch 11 is connected with a detection power supply, and the other end is connected with a guardrail short-circuit detection point;
and when the input end of the maintenance safety loop is at a working high level and the guardrail short circuit detection point is at a detection low level, the controller outputs a short circuit fault signal of the guardrail extension switch 8.
Preferably, when the input end of the maintenance safety loop is at a working high level and the guardrail short-circuit detection point is at a detection low level, the controller controls the operation of the maintenance safety loop to be forbidden.
Preferably, as shown in fig. 1, the elevator safety circuit further comprises an emergency electric operation circuit;
an upper stop reset switch 3 and a lower stop reset switch 5 are connected in series between the working power supply and the input end of the emergency electric operation loop;
the guardrail retracting switch 7 is connected between the input end of the emergency electric operation loop and the input end of the automatic safety loop of the elevator.
In the application of short top layer, the reduction of top layer height can be restricted to the height of sedan-chair top guardrail, and the accessible adopts the sedan-chair top guardrail that can extend to replace original sedan-chair top guardrail to realize the reduction of top layer height.
The elevator safety loop detection system of the seventh embodiment is characterized in that a guardrail retracting switch 7 is connected in series between the working power supply and the input end of the elevator automatic safety loop, and a guardrail extending switch 8 is connected in series between the working power supply and the input end of the maintenance safety loop, so that the safety of maintenance personnel is guaranteed. When the maintainer needs to enter the car top for maintenance, the guardrail extension switch 8 is closed, and the system allows the maintenance safety loop to operate; when the overhaul is completed and the elevator moves back to the landing entrance safety position, the guardrail retraction switch 7 needs to be closed, and the system allows the elevator automatic safety loop to operate.
Example eight
Based on the elevator safety loop detection system of the seventh embodiment, when the input end of the elevator automatic safety loop is at the working high level and the guardrail short circuit detection point is at the detection high level, the controller outputs a short circuit fault signal of the guardrail retraction switch 7.
Preferably, when the input end of the automatic safety loop of the elevator is at a working high level and the guardrail short-circuit detection point is at a detection high level, the controller controls and prohibits the automatic safety loop of the elevator from running.
Example nine
Based on the elevator safety loop detection system of the eighth embodiment, if the processor receives an automatic running state signal of the elevator, the input end of the automatic safety loop of the elevator is at a working high level, and the guardrail short-circuit detection point is at a detection high level, the processor outputs a short-circuit fault alarm signal of the guardrail detection switch 11.
Example ten
Based on any one of the elevator safety loop detection systems in the first embodiment to the ninth embodiment, a safety system reset switch 1 is connected in series between a working power supply and an input end of an automatic safety loop of an elevator;
a safety system action switch 2 is connected in series between the working power supply and the inlet end of the maintenance safety loop.
Preferably, the safety system action switch 2 and the safety system reset switch 1 are both normally open switches, and are closed when triggered by a user.
Preferably, the safety system reset switch 1 and the safety system operation switch 2 are installed at the lowermost layer of the elevator.
The above are merely preferred embodiments of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (20)
1. An elevator safety loop detection system is characterized by comprising an elevator safety loop, a controller and an upper stop detection switch (9);
the elevator safety loop comprises an elevator automatic safety loop and an overhaul safety loop;
an upper stop reset switch (3) is connected in series between the working power supply and the input end of the automatic safety loop of the elevator;
an upper stop action switch (4) is connected in series between the working power supply and the inlet end of the overhaul safety loop;
the upper stop motion switch (4) is a normally open contact and is arranged beside the upper stop device, the upper stop device is provided with a reset position and an effective position, and after the lift car ascends to enable the upper stop device to be arranged at the effective position, the state of the upper stop motion switch (4) is changed into a closed state;
the upper stop reset switch (3) is a normally closed contact which is opposite to the switch logic of the upper stop action switch (4) and is arranged beside the upper stop device, and when the lift car moves upwards to enable the upper stop device to be arranged at a reset position, the state of the upper stop reset switch (3) is changed into off;
the upper stop detection switch (9) is a normally open contact and has the same logic as the upper stop action switch (4);
one end of the upper stop detection switch (9) is connected with a detection power supply, and the other end is connected with an upper stop short-circuit detection point;
and when the input end of the maintenance safety loop is at a working high level and the upper stop short circuit detection point is at a detection low level, the controller outputs a short circuit fault signal of the upper stop motion switch (4).
2. The elevator safety loop detection system of claim 1,
the working high level is 50% to 100% of the positive of the working power supply;
detecting the low level to be 0 to 10 percent of the positive of the detection power supply;
the working power supply is positive + 125V;
the power supply is detected to be + 48V.
3. The elevator safety loop detection system of claim 1,
and when the input end of the maintenance safety loop is at a working high level and the upper stop short circuit detection point is at a detection low level, the controller controls the operation of the maintenance safety loop to be forbidden.
4. The elevator safety loop detection system of claim 1,
when the input end of the automatic safety loop of the elevator is at a working high level and the upper stop short circuit detection point is at a detection high level, the controller outputs a short circuit fault signal of the upper stop reset switch (3).
5. The elevator safety loop detection system of claim 4,
and when the input end of the automatic safety loop of the elevator is at a working high level and the upper stop short circuit detection point is at a detection high level, the controller controls and prohibits the automatic safety loop of the elevator from running.
6. The elevator safety loop detection system of claim 4,
and if the processor receives the automatic running state signal of the elevator, the input end of the automatic safety loop of the elevator is at a working high level, and the upper stop short circuit detection point is at a detection high level, the processor outputs a short circuit fault alarm signal of the upper stop detection switch (9).
7. The elevator safety loop detection system of claim 1,
the elevator safety loop detection system also comprises a lower stop detection switch (10);
an upper stop reset switch (3) and a lower stop reset switch (5) are connected in series between the working power supply and the input end of the automatic safety loop of the elevator;
an upper stop action switch (4) and a lower stop action switch (6) are connected in series between the working power supply and the inlet end of the maintenance safety loop;
the lower stop motion switch (6) is a normally open contact and is arranged beside the lower stop device, the lower stop device has two positions, namely a reset position and an effective position, and after the lower stop device is arranged at the effective position, the state of the lower stop motion switch (6) is changed into a closed state;
the lower stop reset switch (5) is a normally closed contact which is opposite to the switch logic of the lower stop action switch (6) and is arranged beside the lower stop device, and when the lift car moves downwards to enable the lower stop device to be arranged at the reset position, the lower stop reset switch (5) is switched off;
the lower stop detection switch (10) is a normally open contact and has the same switch logic with the lower stop action switch (6);
one end of the lower stop detection switch (10) is connected with a detection power supply, and the other end is connected with a lower stop short-circuit detection point;
and when the input end of the maintenance safety loop is at a working high level and the lower stop short circuit detection point is at a detection low level, the controller outputs a short circuit fault signal of the lower stop action switch (4).
8. The elevator safety loop detection system of claim 7,
and when the input end of the maintenance safety loop is at a working high level and the lower stop short circuit detection point is at a detection low level, the controller controls the operation of the maintenance safety loop to be forbidden.
9. The elevator safety loop detection system of claim 7,
when the input end of the automatic safety loop of the elevator is at a working high level and the lower stop short circuit detection point is at a detection high level, the controller outputs a short circuit fault signal of the upper stop reset switch (3).
10. The elevator safety loop detection system of claim 9,
when the input end of the automatic safety loop of the elevator is at a working high level and the lower stop short circuit detection point is at a detection high level, the controller controls and prohibits the automatic safety loop of the elevator from running.
11. The elevator safety loop detection system of claim 9,
and if the processor receives the automatic running state signal of the elevator, the input end of the automatic safety loop of the elevator is at a working high level, and the lower stop short-circuit detection point is at a detection high level, the processor outputs a short-circuit fault alarm signal of the lower stop detection switch.
12. The elevator safety loop detection system of claim 7,
the elevator safety loop detection system also comprises a guardrail detection switch (11);
an upper stop reset switch (3), a lower stop reset switch (5) and a guardrail retraction switch (7) are connected in series between the working power supply and the input end of the automatic safety loop of the elevator;
an upper stop action switch (4), a lower stop action switch (6) and a guardrail extension switch (8) are connected in series between the working power supply and the inlet end of the maintenance safety loop;
the guardrail extension switch (8) is a normally open contact and is arranged beside the car top guardrail, and when the car top guardrail is unfolded, the state of the guardrail extension switch (8) is changed into a closed state;
the guardrail retracting switch (7) is opposite to the switch logic of the guardrail extending switch (8), is a normally closed contact, is arranged beside the car top guardrail, and is turned off after the car top guardrail is unfolded;
the guardrail detection switch (11) is a normally open contact and has the same logic as the guardrail extension switch (8);
one end of the guardrail detection switch (11) is connected with a detection power supply, and the other end is connected with a guardrail short-circuit detection point;
and the controller outputs a short-circuit fault signal of the guardrail extension switch (8) when the input end of the maintenance safety loop is at a working high level and the guardrail short-circuit detection point is at a detection low level.
13. The elevator safety loop detection system of claim 12,
and when the input end of the maintenance safety loop is at a working high level and the guardrail short circuit detection point is at a detection low level, the controller controls the operation of the maintenance safety loop to be forbidden.
14. The elevator safety loop detection system of claim 12,
the elevator safety circuit further comprises an emergency electric operation circuit;
an upper stop reset switch (3) and a lower stop reset switch (5) are connected in series between the working power supply and the input end of the emergency electric operation loop;
the guardrail retracting switch (7) is connected between the input end of the emergency electric operation loop and the input end of the automatic safety loop of the elevator.
15. The elevator safety loop detection system of claim 12,
when the input end of the automatic safety loop of the elevator is at a working high level and the guardrail short-circuit detection point is at a detection high level, the controller outputs a short-circuit fault signal of the guardrail recovery switch (7).
16. The elevator safety loop detection system of claim 15,
and when the input end of the automatic safety loop of the elevator is at a working high level and the guardrail short-circuit detection point is at a detection high level, the controller controls and prohibits the automatic safety loop of the elevator from running.
17. The elevator safety loop detection system of claim 15,
and if the processor receives the automatic running state signal of the elevator, the input end of the automatic safety loop of the elevator is at a working high level, and the guardrail short-circuit detection point is at a detection high level, the processor outputs a guardrail detection switch short-circuit fault alarm signal.
18. The elevator safety loop detection system of any one of claims 1 to 17,
a safety system reset switch (1) is connected in series between the working power supply and the input end of the automatic safety loop of the elevator;
a safety system action switch (2) is connected in series between the working power supply and the inlet end of the maintenance safety loop.
19. The elevator safety loop detection system of claim 18,
the safety system action switch (2) and the safety system reset switch (1) are both normally open switches and are closed when triggered by a user.
20. The elevator safety loop detection system of claim 18,
the safety system reset switch (1) and the safety system action switch (2) are arranged at the bottommost layer of the elevator.
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