CN110745674B - Safety protection device for overhauling pit of shallow pit elevator - Google Patents
Safety protection device for overhauling pit of shallow pit elevator Download PDFInfo
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- CN110745674B CN110745674B CN201911168019.6A CN201911168019A CN110745674B CN 110745674 B CN110745674 B CN 110745674B CN 201911168019 A CN201911168019 A CN 201911168019A CN 110745674 B CN110745674 B CN 110745674B
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- 230000007246 mechanism Effects 0.000 claims abstract description 75
- 238000001514 detection method Methods 0.000 claims abstract description 58
- 238000012423 maintenance Methods 0.000 claims abstract description 17
- 230000000903 blocking effect Effects 0.000 claims abstract description 14
- 238000009434 installation Methods 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/02—Door or gate operation
- B66B13/14—Control systems or devices
- B66B13/16—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position
- B66B13/18—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position without manually-operable devices for completing locking or unlocking of doors
- B66B13/185—Door or gate locking devices controlled or primarily controlled by condition of cage, e.g. movement or position without manually-operable devices for completing locking or unlocking of doors electrical
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Elevator Door Apparatuses (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
The invention discloses a safety protection device for overhauling a shallow pit elevator pit, which comprises an elevator shaft and a car system, wherein a landing door position detection device is arranged on one side of a bottom elevator door opening, and landing door collision blocks and car door collision blocks are respectively arranged on one side of an elevator landing door adjacent to the car door; the door position detection device comprises a fixed frame, a detection switch, a switch installation block, a reset spring, a rotating frame, a first rotating rod and a second rotating rod; a car blocking device is arranged above the bottom elevator door opening and comprises a first rotating arm, a second rotating arm, a first jacking mechanism, a second jacking mechanism and a stopper; the device also comprises a controller, wherein the detection switch, the first lifting mechanism and the second lifting mechanism are all connected with the control device; a car collision block is arranged at the lower side of the car. The elevator pit maintenance system can ensure the safety of elevator pit maintenance and is convenient for people to go out.
Description
Technical Field
The invention relates to the technical field of elevator overhaul, in particular to a safety protection device for overhauling a shallow pit elevator pit.
Background
As elevator applications become more and more widespread, elevator usage becomes more and more widespread. For old buildings, elevators are also increasingly installed at the beginning; however, the old community has special environment, and especially the circuit, gas, water supply and drainage pipe network and the like below the old large building are complicated, so that the pit for additionally installing the elevator can only be made into a shallow pit for the reasons of fire protection, light removal, structural safety and the like.
The elevator needs to be regularly maintained in daily life in the running process. During maintenance, elevator maintenance personnel inevitably need to enter the elevator pit for operation. For a shallow pit elevator, the overhaul height space of the elevator pit cannot meet the safety overhaul requirement, so that a large potential safety hazard exists for overhaul of the elevator. Therefore, before the maintenance personnel enter the pit, the elevator must be switched to an overhaul state, and certain protection measures must be set at a certain height from the maintenance personnel to ensure the life safety of the maintenance personnel through the protection device. However, in the process of overhauling the current elevator, the elevator is usually in a state of stopping running, and only one part of elevator is usually installed in an old community, which brings great inconvenience to people in traveling.
Therefore, the elevator pit maintenance safety protection device has important significance in not only not affecting the operation of the elevator, but also ensuring the safety of maintenance personnel entering the elevator pit.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a safety protection device for overhauling the pit of the shallow pit elevator, which can effectively solve the problem of potential safety hazards caused by insufficient overhauling height space of the pit of the shallow pit elevator and does not influence the operation of the elevator, thereby ensuring the overhauling safety of the pit of the elevator and facilitating the trip of people.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the safety protection device for the pit overhaul of the shallow pit elevator comprises an elevator shaft and an elevator car system, wherein the elevator car system comprises an elevator car and an elevator car door, the elevator shaft is provided with elevator door openings corresponding to all floors, and elevator landing doors are arranged in the elevator door openings; the method is characterized in that: a landing door position detection device is arranged on one side of the bottom elevator door opening, and the landing door position detection device is close to the upper edge or the lower edge of the elevator landing door; the elevator landing door and the elevator car door are arranged on one side adjacent to each other, a landing door collision block and an elevator car door collision block are arranged at positions corresponding to the landing door position detection device, and the length directions of the landing door collision block and the elevator car door collision block are consistent with the opening and closing directions of the elevator landing door and the elevator car door and are fixedly connected with the elevator landing door and the elevator car door correspondingly;
The landing door position detection device comprises a fixed frame, a detection switch, a switch installation block, a reset spring, a rotating frame, a first rotating rod and a second rotating rod; the fixed frame is fixedly connected with the elevator hoistway, and is provided with a vertically arranged mounting plate, the mounting plate is opposite to a gap between the elevator landing door and the elevator car door, is parallel to the elevator landing door and the elevator car door, and extends to the upper part of the upper edges or the lower part of the lower edges of the elevator landing door and the elevator car door; the switch mounting block is connected with the mounting plate through a return spring, wherein the return spring is horizontally arranged, and the length direction of the return spring is perpendicular to the mounting plate; the detection switch is fixedly connected with the switch mounting block and is positioned at one side of the spring close to the elevator door opening, the detection switch is provided with a rotating arm, the rotating arm can trigger the detection switch when rotating, the free end of the rotating arm extends towards the elevator door opening and is connected with a first collision wheel after being bent towards the landing door direction, and a gap is reserved between the first collision wheel and the landing door collision block; the rotating frame is in a V shape and is horizontally arranged on one side of the reset spring, which is away from the elevator door opening, and one end of the two supporting arms connected with the rotating frame is fixedly connected with the switch mounting block; the first rotating rod and the second rotating rod are respectively connected with the other ends of the two support arms of the rotating frame in a rotating way through a connecting shaft, a torsion spring is sleeved on the connecting shaft, one torsion arm of the torsion spring is fixedly connected with the support arm of the rotating frame, the other torsion arm is correspondingly and fixedly connected with the first rotating rod and the second rotating rod, and under the action of the torsion spring, the first rotating rod and the second rotating rod are respectively positioned on the same straight line with the two support arms of the rotating frame; one ends of the first rotating rod and the second rotating rod, which are far away from the support arm, are respectively provided with a second collision wheel, wherein one sides of the two second collision wheels, which are far away from each other, are respectively protruded out of extension lines of the landing door collision block and the car door collision block, and when the car is positioned at a bottom layer and the elevator landing door and the car door are simultaneously opened, the landing door collision block and the car door collision block can be simultaneously contacted with the corresponding second collision wheels; one end of the rotating frame, which is connected with the two support arms, is also in rotational connection with a first rotating shaft which is vertically arranged, and the first rotating shaft is connected with a fixed frame or an elevator shaft, so that a whole formed by the detection switch, the switch mounting block, the first collision wheel, the rotating frame, the first rotating rod, the second rotating rod and the two second collision wheels can rotate around the first rotating shaft;
A car blocking device is arranged above the bottom elevator door opening and comprises a first rotating arm, a second rotating arm, a first jacking mechanism, a second jacking mechanism and a stopper; one end of the first rotating arm is rotationally connected with the side wall of the elevator shaft through a connecting frame, one end of the first jacking mechanism is rotationally connected with the side wall of the elevator shaft through a bracket, the other end of the first jacking mechanism is connected with the first rotating arm, and in an initial state, under the action of the first jacking mechanism, the first rotating arm is positioned between the side wall of the elevator car and the side wall of the elevator shaft, and the other end of the first rotating arm extends to a position between the rear side of the elevator car and the rear side of the elevator shaft; one end of the second rotating arm is rotationally connected with the other end of the first rotating arm, and the other end of the second rotating arm is connected with the stopper; one end of the second jacking mechanism is rotationally connected with the first rotating arm, the other end of the second jacking mechanism is rotationally connected with the second rotating arm, and in an initial state, the second rotating arm is positioned between the rear side of the lift car and the rear side of the lift shaft;
the device comprises a first lifting mechanism, a second lifting mechanism, a detection switch, a first control unit, a second control unit and a controller, wherein the detection switch, the first lifting mechanism and the second lifting mechanism are connected with the controller; the lower side of the lift car is provided with a lift car collision block which is fixedly connected with the lift car, and when the first lifting mechanism and the second lifting mechanism are both extended, the stopper can be opposite to the lift car collision block.
Further, the transverse section of the switch installation block is L-shaped, the detection switch is fixedly connected with the inner wall of one side of the switch installation block, the rotating frame is fixedly connected with the outer side of the other side of the switch installation block, and the reset spring is positioned between the detection switch and the other side of the switch installation block.
Further, one ends of the landing door collision block and the car door collision block, which are close to the landing door position detection device, extend to the outer sides of the landing door and the car door and extend in opposite directions.
Further, the detection switch is a knob switch or a rotary switch, and the rotary arm can drive a mandrel of the knob switch or the rotary switch to rotate, wherein a torsion spring is arranged on the mandrel, and after the force acting on the rotary arm disappears, the mandrel can drive the rotary arm to reset.
Further, the first jacking mechanism and the second jacking mechanism are electric telescopic mechanisms, air cylinders or hydraulic cylinders.
Further, the car collision block adopts a steel plate, is positioned in the middle of the lower side of the car, and is fixedly connected with the car.
Further, the stopper is a damper.
Compared with the prior art, the invention has the following advantages: simple structure can effectively solve shallow pit elevator pit and overhaul the problem that altitude space is not enough and there is the potential safety hazard to guarantee the security that elevator pit overhauld, and do not influence the operation of elevator, be convenient for people's trip.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is an enlarged view of a portion B in fig. 1.
Fig. 4 is a schematic diagram of an elevator landing door and a car door when open simultaneously.
Fig. 5 is a schematic diagram of an elevator landing door when open.
Fig. 6 is a schematic view of the car stop device when operating.
Fig. 7 is a schematic diagram of the operation of the present invention.
In the figure: 1-elevator shaft, 2-car, 3-car door, 4-elevator landing door, 5-door position detecting device, 51-fixing frame, 52-detecting switch, 53-switch mounting block, 54-return spring, 55-rotating frame, 56-first rotating rod, 57-second rotating rod, 58-rotating arm, 59-first collision wheel, 510-second collision wheel, 6-landing door collision block, 7-car door collision block, 8-car blocking device, 81-first rotating arm, 82-second rotating arm, 83-first lifting mechanism, 84-second lifting mechanism, 85-stopper, 86-connecting frame, 87-bracket, 9-controller, 10-car collision block.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Examples: referring to fig. 1 to 7, a safety protection device for pit maintenance of a shallow pit elevator comprises an elevator shaft 1 and a car 2 system; the car 2 system comprises a car 2 and car doors 3, wherein an elevator door opening is arranged in the elevator shaft 1 corresponding to each floor, and an elevator landing door 4 is arranged in the elevator door opening. In the elevator hoistway 1, a landing door position detecting device 5 is provided on one side of the bottom floor elevator door opening, and the landing door position detecting device 5 is located between the extension lines of the upper edge and the lower edge of the elevator landing door 4 and is close to the extension line of the upper edge or the lower edge of the elevator landing door 4. The elevator landing door 4 and the car door 3 are arranged on one side adjacent to each other, a landing door collision block 6 and a car door collision block 7 are respectively arranged at positions corresponding to the landing door position detection device 5, and the length directions of the landing door collision block 6 and the car door collision block 7 are consistent with the opening and closing directions of the elevator landing door 4 and the car door 3 and are fixedly connected with the elevator landing door 4 and the car door 3 correspondingly. In the concrete implementation, the landing door collision block 6 and the car door collision block 7 are respectively made of strip-shaped steel plates and are correspondingly and fixedly connected with the elevator landing door 4 and the car door 3. Wherein, one end of the landing door collision block 6 and the car door collision block 7, which are close to the landing door position detection device 5, extends to the outer sides of the landing door 4 and the car door 3 and extends in opposite directions; in this way, the landing door collision block 6 and the car door collision block 7 can be guided better, and contact with the landing door position detecting device 5 is facilitated.
The landing door position detecting device includes a fixed frame 51, a detection switch 52, a switch mounting block 53, a return spring 54, a rotating frame 55, and first and second rotating levers 56 and 57. The fixing frame 51 is fixedly connected with the elevator shaft 1, and is provided with a vertically arranged mounting plate, the vertical section of the fixing frame 51 is L-shaped during processing, the horizontal section of the fixing frame is fixedly connected with the elevator shaft 1, and the vertical section forms the mounting plate. The mounting plate is aligned with the gap between the elevator landing door 4 and the car door 3, is parallel to the elevator landing door 4 and the car door 3, and extends above the upper edges or below the lower edges of the elevator landing door 4 and the car door 3. The switch mounting block 53 is connected with the mounting plate through a return spring 54, wherein the return spring 54 is horizontally arranged, the length direction of the return spring 54 is perpendicular to the mounting plate, and two ends of the return spring 54 are fixedly connected with the mounting plate and the switch mounting block 53 respectively.
The detection switch 52 is fixedly connected with the switch mounting block 53 and is positioned at one side of the spring close to the elevator door opening, the detection switch 52 is provided with a rotating arm 58, and the rotating arm 58 can trigger the detection switch 52 when rotating. The detecting switch 52 is a knob switch or a rotary switch, and the rotating arm 58 can drive the spindle of the knob switch or the rotary switch to rotate, so that the detecting switch 52 is turned on or sends out a trigger signal; wherein, the mandrel is provided with a torsion spring, and the mandrel can drive the rotating arm 58 to reset after the force applied on the rotating arm 58 disappears. The free end of the rotating arm extends towards the elevator door opening direction and is connected with a first collision wheel 59 after being bent towards the landing door 4 direction, wherein a gap is reserved between the first collision wheel 59 and the landing door collision block 6. The rotating frame 55 is V-shaped and horizontally arranged on one side of the return spring 54 away from the elevator door opening, and one end of the two arms connected with the switch mounting block 53 is fixedly connected. In actual manufacturing, the transverse section of the switch mounting block 53 is L-shaped, the detection switch 52 is fixedly connected with the inner wall of one side of the switch mounting block 53, the rotating frame 55 is fixedly connected with the outer side of the other side of the switch mounting block 53, and the return spring 54 is positioned between the detection switch 52 and the other side of the switch mounting block 53; in this way, the installation and fixation of the whole landing door position detection device 5 are facilitated, and the normal running of the car 2 is not affected.
The first rotating rod 56 and the second rotating rod 57 are respectively and rotatably connected with the other ends of the two support arms of the rotating frame 55 through a connecting shaft, a torsion spring is sleeved on the connecting shaft, one torsion arm of the torsion spring is fixedly connected with the support arm of the rotating frame 55, and the other torsion arm is correspondingly and fixedly connected with the first rotating rod 56 and the second rotating rod 57; under the action of the torsion spring, the first rotating lever 56 and the second rotating lever 57 are respectively positioned on the same straight line with the two support arms of the rotating frame 55. The first rotating rod 56 and the second rotating rod 57 are respectively provided with a second collision wheel 510 at one end far away from the support arm, wherein one side of the two second collision wheels 510, which is away from each other, is respectively protruded out of the extension lines of the landing door collision block 6 and the car door collision block 7, and when the car 2 is positioned at the bottom layer and the elevator landing door 4 and the car door 3 are simultaneously opened, the landing door collision block 6 and the car door collision block 7 can be simultaneously contacted with the corresponding second collision wheels 510. One end of the rotating frame 55, which is connected with two support arms, is further rotatably connected with a first vertically arranged rotating shaft, and the upper end of the first rotating shaft is bent towards the direction of the fixed frame 51 and then connected with the fixed frame 51, or is bent towards the direction of the side wall of the elevator shaft 1 and then connected with the elevator shaft 1, so that the whole formed by the detecting switch 52, the switch mounting block 53, the first collision wheel 59, the rotating frame 55, the first rotating rod 56, the second rotating rod 57 and the two second collision wheels 510 can rotate around the first rotating shaft.
A car blocking device 8 is further arranged above the bottom elevator door opening, and the car blocking device 8 comprises a first rotating arm 81, a second rotating arm 82, a first lifting mechanism 83, a second lifting mechanism 84 and a stopper 85. The first jacking mechanism 83 and the second jacking mechanism 84 are electric telescopic mechanisms, air cylinders or hydraulic cylinders, preferably electric push rods or electric cylinders, which are more convenient to control and operate and have better stability. One end of the first rotating arm 81 is rotatably connected with the side wall of the elevator shaft 1 through a connecting frame 86, one end of the first jacking mechanism 83 is rotatably connected with the side wall of the elevator shaft 1 through a bracket 87, and the other end of the first rotating arm 81 is first connected; in a specific implementation, the connecting frame 86 and the bracket 87 each include two supporting plates that are vertically distributed and a second rotating shaft that is vertically disposed between the two supporting plates, and the first rotating arm 81 and the first lifting mechanism 83 are respectively connected with the second rotating shaft correspondingly. In the initial state, the first lifting mechanism 83 is in the contracted state, the first rotating arm 81 is located between the side wall of the car 2 and the side wall of the elevator shaft 1 under the action of the first lifting mechanism 83, and the other end thereof extends between the rear side of the car 2 and the rear side of the elevator shaft 1. One end of the second rotating arm 82 is rotatably connected to the other end of the first rotating arm 81, and the other end thereof is connected to the stopper 85; one end of the second jack-up mechanism 84 is rotatably connected to the first rotating arm 81, and the other end is rotatably connected to the second rotating arm 82; in the initial state, the second lifting mechanism 84 is also in the contracted state, and the second rotating arm 82 is located between the rear side of the car 2 and the rear side of the elevator hoistway 1; thus, the whole blocking device does not influence the normal running of the car 2 when not in action. In a specific implementation, the damper 85 is a shock absorber, so that during the operation of the car blocking device 8, the collision between the car 2 and the damper 85 can be effectively reduced, thereby reducing vibration and noise. To ensure that the car blocking device 8 has sufficient bearing capacity, the first swing arm 81 and the second swing arm 82 each adopt a metallic mechanical arm structure so as to be able to bear the weight of the entire car 2.
The controller 9 is further included, the detection switch 52, the first lifting mechanism 83 and the second lifting mechanism 84 are all connected with the controller, and when the detection switch 52 acts, the controller 9 can control the first lifting mechanism 83 and the second lifting mechanism 84 to act correspondingly. As an embodiment, the detecting switch 52 has an angle sensor therein, and is capable of detecting a rotation angle of a spindle (or a rotating arm) of the detecting switch, when the rotating arm rotates, the angle sensor detects a signal, detects that the entrance detection layer door 4 is opened, and then sends a trigger signal to the controller 9, and after receiving the trigger signal, the controller 9 controls the first lifting mechanism 83 and the second lifting mechanism 84 to be started, so that the first lifting mechanism 83 and the second lifting mechanism 84 extend to lift; when the signal detected by the detection switch disappears after the elevator landing door is closed, at this time, the controller 9 again controls the first lift mechanism 83 and the second lift mechanism 84 to retract. As another embodiment, the controller 9 adopts a conversion type relay, the first jacking mechanism 83 and the second jacking mechanism 84 are both electric push rods, the static contact of the relay is connected in series with the detection switch 52, and the normally open movable contact group and the normally closed movable contact group of the relay are respectively connected in series with the first jacking mechanism 83 and the second jacking mechanism 84, wherein the power supply directions of the normally open movable contact group and the normally closed movable contact group are opposite, and in an initial state, the first jacking mechanism 83 and the second jacking mechanism 84 are in a contracted state; in this way, the detection switch 52 is a common knob switch, and when the detection switch 52 is closed, the relay can control the first lifting mechanism 83 and the second lifting mechanism 84 to be electrified reversely, so that the first lifting mechanism 83 and the second lifting mechanism 84 extend out; when the detection switch 52 is turned off again, the relay resumes the energizing direction of the first jack-up mechanism 83 and the second jack-up mechanism 84, thereby retracting the first jack-up mechanism 83 and the second jack-up mechanism 84; the whole control loop is simpler in structure and better in stability.
A car collision block 10 is arranged on the lower side of the car 2, and the car collision block 10 is fixedly connected with the car 2, wherein the car collision block 10 adopts a steel plate, is positioned in the middle of the lower side of the car 2 and is fixedly connected with the car 2; so that the strength of the car crash block 10 can be effectively improved. When both the first jack mechanism 83 and the second jack mechanism 84 are extended, the stopper 85 can be made to face the car bump 10.
When the elevator car 2 normally runs to the bottom door, the elevator landing door 4 and the car door 3 are simultaneously opened, the landing door collision block 6 and the car door collision block 7 simultaneously strike the two second collision wheels 510, the torsional forces acted on the rotating frame 55 by the two torsion springs are mutually counteracted, the positions of the detection switch 52, the switch mounting block 53 and the rotating frame 55 are kept motionless, a gap is kept between the first collision wheel 59 and the landing door collision block 6 on the detection switch 52, the elevator car is not contacted, the car blocking device 8 does not act, and the normal running up and down of the elevator car 2 is not influenced.
When a maintainer needs to enter an elevator pit to overhaul the elevator, the elevator car 2 is controlled to stop at a non-bottom layer position, and then the bottom layer elevator landing door 4 is opened, at this time, since only the elevator landing door 4 is opened, after the landing door collision block 6 impacts the second collision wheel 510, the whole rotating frame 55, the switch mounting block 53 and the detection switch 52 are driven to rotate around the first rotating shaft, and the switch mounting block 53 is driven to compress the reset spring 54, so that the first collision wheel 59 on the detection switch 52 impacts the landing door collision block 6, and the rotating arm 58 rotates to perform switching action. After the switch action, send trigger signal to the controller 9 or directly control car blocking device 8 action through the controller 9, make car blocking device 8 extension, stopper 85 removes to car collision piece 10 under to prevent car 2 to continue the decline, thereby reach the purpose that prevents elevator car 2 decline threat maintainer safety. Because car blocking device 8 is located the elevator door opening upside in elevator well 1 bottom, consequently, in whole maintenance process, elevator car 2 is outside unable decline to the bottom, and the operation of other floors is normal to can reduce the elevator greatly and overhaul the influence to elevator operation, the trip of people of being more convenient for.
When the maintenance personnel finishes maintenance, the floor elevator landing door 4 is closed, the detection switch 52 of the landing door position detection device 5 is restored to the initial position under the action of the reset spring 54, the detection switch 52 is reset, the controller 9 again controls the car blocking device 8 to restore to the initial state, and the elevator resumes operation.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and those skilled in the art should understand that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the present invention, and all such modifications and equivalents are included in the scope of the claims.
Claims (5)
1. The safety protection device for the pit overhaul of the shallow pit elevator comprises an elevator shaft and an elevator car system, wherein the elevator car system comprises an elevator car and an elevator car door, the elevator shaft is provided with elevator door openings corresponding to all floors, and elevator landing doors are arranged in the elevator door openings; the method is characterized in that: a landing door position detection device is arranged on one side of the bottom elevator door opening, and the landing door position detection device is close to the upper edge or the lower edge of the elevator landing door; the elevator landing door and the elevator car door are arranged on one side adjacent to each other, a landing door collision block and an elevator car door collision block are arranged at positions corresponding to the landing door position detection device, and the length directions of the landing door collision block and the elevator car door collision block are consistent with the opening and closing directions of the elevator landing door and the elevator car door and are fixedly connected with the elevator landing door and the elevator car door correspondingly;
The landing door position detection device comprises a fixed frame, a detection switch, a switch installation block, a reset spring, a rotating frame, a first rotating rod and a second rotating rod; the fixed frame is fixedly connected with the elevator hoistway, and is provided with a vertically arranged mounting plate, the mounting plate is opposite to a gap between the elevator landing door and the elevator car door, is parallel to the elevator landing door and the elevator car door, and extends to the upper part of the upper edges or the lower part of the lower edges of the elevator landing door and the elevator car door; the switch mounting block is connected with the mounting plate through a return spring, wherein the return spring is horizontally arranged, and the length direction of the return spring is perpendicular to the mounting plate; the detection switch is fixedly connected with the switch mounting block and is positioned at one side of the spring close to the elevator door opening, the detection switch is provided with a rotating arm, the rotating arm can trigger the detection switch when rotating, the free end of the rotating arm extends towards the elevator door opening and is connected with a first collision wheel after being bent towards the landing door direction, and a gap is reserved between the first collision wheel and the landing door collision block; the transverse section of the switch mounting block is L-shaped, the detection switch is fixedly connected with the inner wall of one side of the switch mounting block, the rotating frame is fixedly connected with the outer side of the other side of the switch mounting block, and the reset spring is positioned between the detection switch and the other side of the switch mounting block;
The rotating frame is in a V shape and is horizontally arranged on one side of the reset spring, which is away from the elevator door opening, and one end of the two supporting arms connected with the rotating frame is fixedly connected with the switch mounting block; the first rotating rod and the second rotating rod are respectively connected with the other ends of the two support arms of the rotating frame in a rotating way through a connecting shaft, a torsion spring is sleeved on the connecting shaft, one torsion arm of the torsion spring is fixedly connected with the support arm of the rotating frame, the other torsion arm is correspondingly and fixedly connected with the first rotating rod and the second rotating rod, and under the action of the torsion spring, the first rotating rod and the second rotating rod are respectively positioned on the same straight line with the two support arms of the rotating frame; one ends of the first rotating rod and the second rotating rod, which are far away from the support arm, are respectively provided with a second collision wheel, wherein one sides of the two second collision wheels, which are far away from each other, are respectively protruded out of extension lines of the landing door collision block and the car door collision block, and when the car is positioned at a bottom layer and the elevator landing door and the car door are simultaneously opened, the landing door collision block and the car door collision block can be simultaneously contacted with the corresponding second collision wheels; one end of the rotating frame, which is connected with the two support arms, is also in rotational connection with a first rotating shaft which is vertically arranged, and the first rotating shaft is connected with a fixed frame or an elevator shaft, so that a whole formed by the detection switch, the switch mounting block, the first collision wheel, the rotating frame, the first rotating rod, the second rotating rod and the two second collision wheels can rotate around the first rotating shaft;
A car blocking device is arranged above the bottom elevator door opening and comprises a first rotating arm, a second rotating arm, a first jacking mechanism, a second jacking mechanism and a stopper; one end of the first rotating arm is rotationally connected with the side wall of the elevator shaft through a connecting frame, one end of the first jacking mechanism is rotationally connected with the side wall of the elevator shaft through a bracket, the other end of the first jacking mechanism is connected with the first rotating arm, and in an initial state, under the action of the first jacking mechanism, the first rotating arm is positioned between the side wall of the elevator car and the side wall of the elevator shaft, and the other end of the first rotating arm extends to a position between the rear side of the elevator car and the rear side of the elevator shaft; one end of the second rotating arm is rotationally connected with the other end of the first rotating arm, and the other end of the second rotating arm is connected with the stopper; one end of the second jacking mechanism is rotationally connected with the first rotating arm, the other end of the second jacking mechanism is rotationally connected with the second rotating arm, and in an initial state, the second rotating arm is positioned between the rear side of the lift car and the rear side of the lift shaft;
The device comprises a first lifting mechanism, a second lifting mechanism, a detection switch, a first control unit, a second control unit and a controller, wherein the detection switch, the first lifting mechanism and the second lifting mechanism are connected with the controller; the lower side of the lift car is provided with a lift car collision block which is fixedly connected with the lift car, and when the first lifting mechanism and the second lifting mechanism are both extended, the stopper can be opposite to the lift car collision block; one ends of the landing door collision block and the car door collision block, which are close to the landing door position detection device, extend to the outer sides of the landing door and the car door and extend in opposite directions.
2. The safety protection device for pit maintenance of a shallow pit elevator according to claim 1, wherein: the detection switch is a knob switch or a rotary switch, the rotary arm can drive a mandrel of the knob switch or the rotary switch to rotate, a torsion spring is arranged on the mandrel, and the mandrel can drive the rotary arm to reset after the force acting on the rotary arm disappears.
3. The safety protection device for pit maintenance of a shallow pit elevator according to claim 1, wherein: the first lifting mechanism and the second lifting mechanism are electric telescopic mechanisms, air cylinders or hydraulic cylinders.
4. The safety protection device for pit maintenance of a shallow pit elevator according to claim 1, wherein: the car collision block adopts a steel plate, is positioned in the middle of the lower side of the car, and is fixedly connected with the car.
5. The safety protection device for pit maintenance of a shallow pit elevator according to claim 1, wherein: the stopper is a damper.
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