Elevator safety intelligent guarantee system

Abstract

The utility model relates to an elevator safety intelligent guarantee system which is characterized in that a level transponder receives level signals of a slippage amount detector, a stopping force detection device and a current abnormity detector, corresponding levels are fed back to an elevator locking device, and a push-pull circuit of the elevator locking device drives a motor to rotate forwards or overturn according to the levels fed back by the level transponder; the forward rotation of the motor enables the sliding part to turn off the electric switch of the elevator, the elevator is powered off and enters a self-locking safety guarantee state, and then the defect of elevator safety accidents caused by wrong response of level signals of a traditional elevator electric controller is overcome. And when the level transponder does not receive any feedback signal level, the elevator locking device does not work.

Description

Technical Field

[0001] The present application relates to the technical field of elevator equipment, and in particular to an intelligent elevator safety protection system. Background Art

[0002] As a personnel and cargo handling equipment in high-rise buildings, the safety of elevators is increasingly valued by users. Traditional elevators compare the absolute position sensor installed in the shaft with the position information fed back by the pulse of the rotary encoder of the elevator traction machine to feedback the slippage of the wire rope and detect the abnormal slippage value, so as to detect faults and ensure the safe operation of the elevator. In fact, it is difficult for a single detection item to ensure the safe operation of the elevator throughout the entire cycle. Therefore, elevators on the market also use related equipment such as braking force detection equipment, car door locking system, and electrical equipment current abnormality detection system to perform elevator safety protection work. These devices perform elevator safety protection work from different systems of the elevator. In the actual working process, engineers found that the elevator electrical controller is difficult to cope with the orderly protection work under multi-task working state. Simply, the wrong response of the level signal fed back by each safety protection system is one of the reasons for the occurrence of elevator safety accidents. To this end, it is necessary to propose an elevator safety intelligent protection system to address the disadvantages of the traditional elevator electrical controller having the wrong response of the level signal, which leads to elevator safety accidents. Utility Model Content

[0003] Based on this, it is necessary to propose an elevator safety intelligent protection system to address the drawbacks of traditional elevator electrical controllers that have erroneous responses to level signals, which lead to elevator safety accidents.

[0004] The present application relates to an elevator safety intelligent protection system, comprising:

[0005] Level transponder;

[0006] A slip detector electrically connected to the level transponder;

[0007] a restraining force detection device, comprising a force sensor and a threshold comparator, wherein the force sensor is electrically connected to the threshold comparator, and the threshold comparator is electrically connected to the level transponder;

[0008] An elevator locker comprises a sliding part, a motor and a push-pull circuit, wherein the sliding part is meshed with a gear of a power shaft of the motor, the motor is electrically connected to the push-pull circuit, and the push-pull circuit is electrically connected to the level transponder;

[0009] The current anomaly detector comprises a current sensor, an analog converter and a level comparator, wherein the current sensor is electrically connected to the analog converter, the analog converter is electrically connected to the level comparator, and the level comparator is electrically connected to the level responder.

[0010] Further, the level responder includes an AND gate;

[0011] The slip detector is electrically connected to the first input terminal of the AND gate;

[0012] The threshold comparator is electrically connected to the second input terminal of the AND gate;

[0013] The level comparator is electrically connected to the third input terminal of the AND gate.

[0014] Furthermore, the level responder also includes an NPN type MOS tube;

[0015] The gate of the NPN MOS tube is electrically connected to the output end of the AND gate;

[0016] The drain of the NPN MOS tube is electrically connected to the power supply of the elevator;

[0017] The source of the NPN MOS tube is grounded;

[0018] The input end of the push-pull circuit is electrically connected to the source of the NPN MOS tube.

[0019] Furthermore, the level responder also includes a current limiting resistor and a clamping resistor;

[0020] The current limiting resistor is arranged in a connection link between the gate of the NPN MOS tube and the output end of the AND gate;

[0021] The clamping resistor is arranged in a connection link between the input terminal of the push-pull circuit and the ground terminal.

[0022] Furthermore, the threshold comparator and the level comparator have the same structure;

[0023] The threshold comparator includes an operational amplifier;

[0024] The positive input terminal of the operational amplifier is electrically connected to the force sensor;

[0025] The inverting input terminal of the operational amplifier is electrically connected to a reference power supply;

[0026] The output terminal of the operational amplifier is electrically connected to the second input terminal of the AND gate.

[0027] Furthermore, the threshold comparator further includes a first voltage-limiting resistor and a second voltage-limiting resistor;

[0028] The first voltage-limiting resistor is arranged in a connection link between the positive input terminal of the operational amplifier and the force sensor;

[0029] The second voltage-limiting resistor is arranged in a connection link between the inverting input terminal of the operational amplifier and a reference power supply.

[0030] Further, the push-pull circuit includes a NOT gate and a trigger;

[0031] The source of the NPN MOS tube is electrically connected to the input end of the NOT gate;

[0032] The output end of the NOT gate is electrically connected to the contactor of the motor;

[0033] The source of the NPN MOS tube is electrically connected to the input end of the trigger;

[0034] The output end of the trigger is electrically connected to the contactor of the motor.

[0035] Further, the slip detector includes a pressure sensor and a pressure threshold comparator;

[0036] The pressure sensor is electrically connected to the pressure threshold comparator;

[0037] The level responder is electrically connected to the pressure threshold comparator;

[0038] The pressure sensor is arranged at the bottom of the counterweight unit of the elevator.

[0039] Further, the slip detector also includes a slip measuring device;

[0040] The slip measuring device includes a resistance wheel, a pendulum and a torsion spring;

[0041] The first end of the swing rod is rotatably connected to the working part;

[0042] The second end of the swing rod is rotatably connected to the resistance wheel;

[0043] One end of the torsion spring is fixedly connected to the second end of the swing rod;

[0044] The other end of the torsion spring is fixedly connected to the inner circumference of the resistance wheel.

[0045] Further, the slip measurement device also includes a first electrode and a second electrode;

[0046] The resistance wheel is provided with a circular ring groove;

[0047] The annular groove is arranged on the outer edge surface of the resistance wheel;

[0048] The preset groove surface of the annular groove is provided with a resistor sheet;

[0049] The outer edge surface of the resistance wheel is rough, and the outer edge surface of the resistance wheel is made of insulating material;

[0050] The first electrode and the second electrode are both electrically connected to a signal cable; the signal cable is electrically connected to the level transponder;

[0051] The first electrode and the second electrode both abut against a preset groove surface of the annular groove.

[0052] The present application relates to an intelligent elevator safety protection system, which receives level signals of a slip detector, a stopping force detection device and a current anomaly detector through a level transponder, and feeds back the corresponding level to the elevator lock. The push-pull circuit of the elevator lock drives the motor to rotate forward or reverse according to the level fed back by the level transponder. The forward rotation of the motor causes the sliding part to close the electric switch of the elevator, and the elevator is powered off and enters a self-locking safety protection state, thereby solving the problem that the traditional elevator electrical controller has an erroneous response to the level signal, which leads to elevator safety accidents. Specifically, when the slip detector detects that the displacement sliding amount of the elevator exceeds the threshold, the signal level will be fed back to the level transponder. When the stopping force detected by the force sensor is lower than the standard threshold of the threshold comparator, the signal level will be fed back to the level transponder. When the current sensor detects that the working current of the elevator electrical equipment is too large, the current analog quantity is converted into a switch quantity through an analog quantity converter. When the level comparator detects an abnormal switch quantity, the signal level will be fed back to the level transponder. When the level transponder does not receive any feedback signal level, the elevator lock does not work. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic diagram of the structure of an intelligent elevator safety protection system provided in one embodiment of the present application.

[0054] Figure 2 A circuit diagram of an elevator safety intelligent protection system provided in one embodiment of the present application.

[0055] Figure 3 A schematic diagram of the structure of a slip measuring device of an elevator safety intelligent protection system provided in one embodiment of the present application.

[0056] Figure 4 A schematic diagram of the resistance wheel structure of an elevator safety intelligent protection system provided in one embodiment of the present application.

[0057] Reference numerals:

[0058] 100-level transponder; 110-AND gate; 111-first input terminal of the AND gate;

[0059] 112 - a second input terminal of the AND gate; 113 - a third input terminal of the AND gate; 120 - an NPN MOS tube;

[0060] 130-current limiting resistor; 140-clamping resistor; 200-slip detector; 210-pressure sensor;

[0061] 220 - pressure threshold comparator; 230 - slippage measuring device; 231 - resistance wheel; 232 - swing rod;

[0062] 233 - torsion spring; 234 - first electrode; 235 - second electrode; 236 - annular groove; 237 - resistor;

[0063] 300-restraining force detection device; 310-force sensor; 320-threshold comparator; 321-operational amplifier;

[0064] 322-first voltage limiting resistor; 323-second voltage limiting resistor; 400-elevator lock; 410-sliding part;

[0065] 420-motor; 430-push-pull circuit; 431-not gate; 432-trigger; 500-current anomaly detector; 510-current sensor; 520-analog converter; 530-level comparator. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0067] The present application provides an intelligent elevator safety assurance system.

[0068] like Figure 1 As shown, in one embodiment of the present application, an elevator safety intelligent protection system includes a level transponder 100, a slip detector 200, a braking force detection device 300, an elevator lock 400 and a current anomaly detector 500.

[0069] The slip detector 200 is electrically connected to the level responder 100 .

[0070] The restraining force detection device 300 includes a force sensor 310 and a threshold comparator 320 . The force sensor 310 is electrically connected to the threshold comparator 320 , and the threshold comparator 320 is electrically connected to the level responder 100 .

[0071] The elevator lock 400 includes a sliding part 410, a motor 420 and a push-pull circuit 430, the sliding part 410 is meshed with a gear of a power shaft of the motor 420, the motor 420 is electrically connected to the push-pull circuit 430, and the push-pull circuit 430 is electrically connected to the level transponder 100.

[0072] The current anomaly detector 500 includes a current sensor 510 , an analog converter 520 and a level comparator 530 , wherein the current sensor 510 is electrically connected to the analog converter 520 , the analog converter 520 is electrically connected to the level comparator 530 , and the level comparator 530 is electrically connected to the level responder 100 .

[0073] Specifically, when the slip detector 200 detects that the displacement of the elevator exceeds the threshold, the signal level will be fed back to the level responder 100. When the stopping force detected by the force sensor 310 is lower than the standard threshold of the threshold comparator 320, the signal level will be fed back to the level responder 100. When the current sensor 510 detects that the working current of the elevator electrical equipment is too large, the current analog quantity is converted into a switch quantity through the analog quantity converter 520. When the level comparator 530 detects an abnormal switch quantity, the signal level will be fed back to the level responder 100. When the level responder 100 does not receive any feedback signal level, the elevator lock 400 does not work.

[0074] More specifically, the slip detector 200 can be a slip meter 230, or a pressure sensor 210, a pressure threshold comparator 220. When the slip meter 230, the pressure sensor 210, and the pressure threshold comparator 220 are used simultaneously, the output end of the slip meter 230 and the output end of the pressure threshold comparator 220 are simultaneously connected to the input end of the OR gate. At this time, the output end of the OR gate is electrically connected to the third input end 113 of the AND gate of the level responder 100.

[0075] The present application relates to an intelligent elevator safety protection system, which receives level signals from a slip detector 200, a braking force detection device 300 and a current anomaly detector 500 through a level responder 100, and feeds back corresponding levels to an elevator lock 400. A push-pull circuit 430 of the elevator lock 400 drives a motor 420 to rotate forward or reverse according to the level fed back by the level responder 100. The forward rotation of the motor 420 causes a sliding part 410 to close the elevator's power switch, and the elevator is powered off and enters a self-locking safety protection state, thereby solving the problem that a traditional elevator electrical controller has an erroneous response to a level signal, which leads to elevator safety accidents.

[0076] like Figure 2 As shown, in one embodiment of the present application, the level responder 100 includes an AND gate 110. The slip detector 200 is electrically connected to the first input terminal 111 of the AND gate 110. The threshold comparator 320 is electrically connected to the second input terminal 112 of the AND gate 110. The level comparator 530 is electrically connected to the third input terminal 113 of the AND gate 110.

[0077] Specifically, the three input terminals of the AND gate 110 receive the level signals of the slip detector 200, the threshold comparator 320 and the level comparator 530 respectively. The AND gate 110 is characterized by a union logic relationship. For example, when the slip detector 200, the threshold comparator 320 and the level comparator 530 simultaneously input high-level signals, the AND gate 110 will output a high-level signal. When at least one of the slip detector 200, the threshold comparator 320 and the level comparator 530 inputs a low-level signal, the AND gate 110 will output a low-level signal.

[0078] like Figure 2 As shown, in one embodiment of the present application, the level responder 100 further includes an NPN MOS transistor 120. The gate of the NPN MOS transistor 120 is electrically connected to the output end of the AND gate 110. The drain of the NPN MOS transistor 120 is electrically connected to the power supply of the elevator. The source of the NPN MOS transistor 120 is grounded. The input end of the push-pull circuit 430 is electrically connected to the source of the NPN MOS transistor 120.

[0079] Specifically, when the gate of the NPN MOS transistor 120 receives a high level, the NPN MOS transistor 120 is turned on, and the input end of the push-pull circuit 430 receives a high level.

[0080] When the gate of the NPN MOS transistor 120 receives a low level, the NPN MOS transistor 120 is turned off, and the input end of the push-pull circuit 430 receives a low level.

[0081] like Figure 2 As shown, in one embodiment of the present application, the level responder 100 further includes a current limiting resistor 130 and a clamping resistor 140. The current limiting resistor 130 is arranged in a connection link between the gate of the NPN MOS tube 120 and the output end of the AND gate 110. The clamping resistor 140 is arranged in a connection link between the input end of the push-pull circuit 430 and the ground end.

[0082] Specifically, the current limiting resistor 130 is disposed in the connection link between the gate of the NPN MOS tube 120 and the output end of the AND gate 110 , which ensures that the NPN MOS tube 120 will not be broken down by the high level when receiving the high level.

[0083] The clamp resistor 140 is disposed in the connection link between the input terminal of the push-pull circuit 430 and the ground terminal, ensuring that the push-pull circuit 430 will not be broken down by the high level when receiving the high level.

[0084] like Figure 2As shown, in one embodiment of the present application, the threshold comparator 320 and the level comparator 530 have the same structure. The threshold comparator 320 includes an operational amplifier 321. The positive input terminal of the operational amplifier 321 is electrically connected to the force sensor 310. The negative input terminal of the operational amplifier 321 is electrically connected to a reference power supply. The output terminal of the operational amplifier 321 is electrically connected to the second input terminal of the AND gate 110.

[0085] Specifically, since the force sensor 310 can receive continuous level signals, the level signal output by the force sensor 310 is screened by the operational amplifier 321. When the level signal output by the force sensor 310 exceeds or is lower than the reference power supply, the output end of the operational amplifier 321 will output a signal level.

[0086] More specifically, the force sensor 310 may be an NPN sensor or a PNP sensor.

[0087] like Figure 2 As shown, in one embodiment of the present application, the threshold comparator 320 further includes a first voltage-limiting resistor 322 and a second voltage-limiting resistor 323. The first voltage-limiting resistor 322 is provided in a connection link between the positive input terminal of the operational amplifier 321 and the force sensor 310. The second voltage-limiting resistor 323 is provided in a connection link between the negative input terminal of the operational amplifier 321 and a reference power supply.

[0088] Specifically, the first voltage-limiting resistor 322 and the second voltage-limiting resistor 323 ensure that the operational amplifier 321 is not broken down by a high level.

[0089] like Figure 2 As shown, in one embodiment of the present application, the push-pull circuit 430 includes a NOT gate 431 and a trigger 432. The source of the NPN MOS transistor 120 is electrically connected to the input of the NOT gate 431. The output of the NOT gate 431 is electrically connected to the contactor of the motor 420. The source of the NPN MOS transistor 120 is electrically connected to the input of the trigger 432. The output of the trigger 432 is electrically connected to the contactor of the motor 420.

[0090] Specifically, the NOT gate 431 and the trigger 432 are complementary in circuit logic. When the source of the NPN MOS transistor 120 is at a high level, the NOT gate 431 outputs a low level and the trigger 432 outputs a high level. When the source of the NPN MOS transistor 120 is at a low level, the NOT gate 431 outputs a high level and the trigger 432 outputs a low level.

[0091] More specifically, the contactor of the motor 420 may be a bipolar thyristor.

[0092] like Figure 3 As shown, in one embodiment of the present application, the slip detector 200 further includes a slip measuring device 230. The slip measuring device 230 includes a resistance wheel 231, a swing rod 232 and a torsion spring 233. The first end of the swing rod 232 is rotationally connected to the working part. The second end of the swing rod 232 is rotationally connected to the resistance wheel 231. One end of the torsion spring 233 is fixedly connected to the second end of the swing rod 232. The other end of the torsion spring 233 is fixedly connected to the inner circumference of the resistance wheel 231.

[0093] like Figure 4 As shown, in one embodiment of the present application, the resistor wheel 231 is provided with an annular groove 236. The annular groove 236 is provided on the outer edge surface of the resistor wheel 231. A resistor sheet 237 is provided on the preset groove surface of the annular groove 236. The outer edge surface of the resistor wheel 231 is rough, and the outer edge surface of the resistor wheel 231 is made of insulating material.

[0094] The slippage measuring device 230 further includes a first electrode 234 and a second electrode 235. The first electrode 234 and the second electrode 235 are both electrically connected to the signal cable. The first electrode 234 and the second electrode 235 are both against the preset groove surface of the annular groove 236.

[0095] Specifically, when the resistance wheel 231 is against the moving wire rope, it will rotate. When the rotation amount of the outer edge of the resistance wheel 231 exceeds the design value, the first electrode 234 and the second electrode 235 can contact the resistor sheet 237 of the preset groove surface. At this time, the first electrode 234 and the second electrode 235 are connected, and the first electrode 234 and the second electrode 235 feedback the prompt level, prompting the maintenance personnel to inspect the elevator.

[0096] The technical features of the above-described embodiments may be arbitrarily combined, and the execution order of the method steps is not limited. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An elevator safety intelligent protection system, characterized in that: include: Level transponder; A slip detector electrically connected to the level transponder; a restraining force detection device, comprising a force sensor and a threshold comparator, wherein the force sensor is electrically connected to the threshold comparator, and the threshold comparator is electrically connected to the level transponder; An elevator locker comprises a sliding part, a motor and a push-pull circuit, wherein the sliding part is meshedly connected with a gear of a power shaft of the motor, the motor is electrically connected with the push-pull circuit, and the push-pull circuit is electrically connected with the level transponder; The current anomaly detector comprises a current sensor, an analog converter and a level comparator, wherein the current sensor is electrically connected to the analog converter, the analog converter is electrically connected to the level comparator, and the level comparator is electrically connected to the level responder.

2. The elevator safety intelligent protection system according to claim 1, characterized in that: The level responder includes an AND gate; The slip detector is electrically connected to the first input terminal of the AND gate; The threshold comparator is electrically connected to the second input terminal of the AND gate; The level comparator is electrically connected to the third input terminal of the AND gate.

3. The elevator safety intelligent protection system according to claim 2, characterized in that: The level responder also includes an NPN type MOS tube; The gate of the NPN MOS tube is electrically connected to the output end of the AND gate; The drain of the NPN MOS tube is electrically connected to the power supply of the elevator; The source of the NPN MOS tube is grounded; The input end of the push-pull circuit is electrically connected to the source of the NPN MOS tube.

4. The elevator safety intelligent protection system according to claim 3 is characterized in that: The level responder also includes a current limiting resistor and a clamping resistor; The current limiting resistor is arranged in a connection link between the gate of the NPN MOS tube and the output end of the AND gate; The clamping resistor is arranged in a connection link between the input terminal of the push-pull circuit and the ground terminal.

5. The elevator safety intelligent protection system according to claim 4, characterized in that: The threshold comparator and the level comparator have the same structure; The threshold comparator includes an operational amplifier; The positive input terminal of the operational amplifier is electrically connected to the force sensor; The inverting input terminal of the operational amplifier is electrically connected to a reference power supply; The output terminal of the operational amplifier is electrically connected to the second input terminal of the AND gate.

6. The elevator safety intelligent protection system according to claim 5, characterized in that: The threshold comparator further includes a first voltage limiting resistor and a second voltage limiting resistor; The first voltage-limiting resistor is arranged in a connection link between the positive input terminal of the operational amplifier and the force sensor; The second voltage-limiting resistor is arranged in a connection link between the inverting input terminal of the operational amplifier and a reference power supply.

7. The elevator safety intelligent protection system according to claim 6, characterized in that: The push-pull circuit includes a NOT gate and a trigger; The source of the NPN MOS tube is electrically connected to the input end of the NOT gate; The output end of the NOT gate is electrically connected to the contactor of the motor; The source of the NPN MOS tube is electrically connected to the input terminal of the trigger; The output end of the trigger is electrically connected to the contactor of the motor.

8. The elevator safety intelligent protection system according to claim 1, characterized in that: The slip detector includes a pressure sensor and a pressure threshold comparator; The pressure sensor is electrically connected to the pressure threshold comparator; The level responder is electrically connected to the pressure threshold comparator; The pressure sensor is arranged at the bottom of the counterweight unit of the elevator.

9. The elevator safety intelligent protection system according to claim 8, characterized in that: The slip detector also includes a slip measurer; The slip measuring device includes a resistance wheel, a pendulum and a torsion spring; The first end of the swing rod is rotatably connected to the working part; The second end of the swing rod is rotatably connected to the resistance wheel; One end of the torsion spring is fixedly connected to the second end of the swing rod; The other end of the torsion spring is fixedly connected to the inner circumference of the resistance wheel.

10. The elevator safety intelligent protection system according to claim 9, characterized in that: The slip measurement device also includes a first electrode and a second electrode; The resistance wheel is provided with a circular ring groove; The annular groove is arranged on the outer edge surface of the resistance wheel; The preset groove surface of the annular groove is provided with a resistor sheet; The outer edge surface of the resistance wheel is rough, and the outer edge surface of the resistance wheel is made of insulating material; The first electrode and the second electrode are both electrically connected to a signal cable; The signal cable is electrically connected to the level transponder; The first electrode and the second electrode both abut against a preset groove surface of the annular groove.

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