Early warning and cutting-off device for abnormal working conditions of elevator

Abstract

The utility model relates to the technical field of elevator detection, in particular to an elevator abnormal working condition early warning and cut-off device which is provided with an operation detection assembly, an emergency cut-off assembly and an early warning assembly, the early warning assembly is in communication connection with the operation detection assembly, the early warning assembly is electrically connected with the emergency cut-off assembly, and the emergency cut-off assembly is electrically connected with the emergency cut-off assembly. The emergency cut-off assembly is electrically connected with a safety circuit of an elevator driving motor and a door lock circuit of an elevator car. The operation detection assembly is installed on the top of an elevator car. Thus, the early warning assembly calculates the actual braking distance of the elevator according to the elevator average acceleration data and the elevator running speed data collected by the running detection assembly, the actual braking distance is compared with the preset braking distance threshold value range, and when deviation exists between the actual braking distance and the preset braking distance threshold value range, workers are reminded to conduct inspection and maintenance operation on the elevator. And elevator safety accidents are prevented in advance.

Description

TECHNICAL FIELD

[0001] The utility model relates to elevator detection technical field especially relates to a kind of elevator abnormal condition early warning and cutting device. BACKGROUND

[0002] With the continuous acceleration of urbanization process and the continuous improvement of people's living standards, the popularity rate of elevator is also increasing year by year, and by the end of 2023, the elevator ownership in China exceeds 10 million, while maintaining a high annual growth rate, at the same time, the number of elevators that have been in use for more than 10 years is also increasing year by year, and these elevators have become "old elevators" with high safety hazards and high security pressure.

[0003] These "old elevators" sometimes cause safety accidents such as "opening the door and walking the elevator", car falling and car top collision, causing personnel casualties, and the causes of these safety accidents are usually elevator door lock safety circuit failure and elevator brake failure.

[0004] To solve the above technical problems, the technical solution disclosed in the Chinese utility model patent with patent application number CN202220304456.7 is an elevator abnormal condition emergency cutoff device, which comprises a safety monitoring assembly, an emergency braking assembly and a monitoring host. The safety monitoring assembly is electrically connected with a speed sensor, a first loop detection sensor and a second loop detection sensor. The speed sensor is used to detect the running speed of the elevator. The first loop detection sensor is used to detect the safety loop of the elevator. The second loop detection sensor is used to detect the door lock loop of the elevator. The emergency braking assembly can be electrically connected with the safety loop of the elevator and is used to cut off the control of the safety loop of the elevator. The input end of the monitoring host is electrically connected with the safety monitoring assembly, and the output end of the monitoring host is electrically connected with the emergency braking assembly. When the elevator is in abnormal condition, the monitoring host cuts off the safety loop of the elevator through the emergency braking assembly to make the elevator emergency brake, which is beneficial to improve the safety of elevator operation.

[0005] However, the above-mentioned prior art has the following technical problems: the above-mentioned elevator abnormal condition emergency cutoff device can only make the elevator emergency brake to prevent safety accidents when the elevator is in abnormal condition, which still causes safety hazards to passengers. UTILITY MODEL CONTENT

[0006] Therefore, it is necessary to provide an elevator abnormal condition early warning and cutting device that can detect safety hazards existing in the running process of the elevator to prevent safety accidents from occurring in advance.

[0007] The utility model provides an elevator abnormal working condition early warning and cut -off device, including operation detection subassembly, emergency cut -off subassembly and early warning subassembly, early warning subassembly with operation detection subassembly communication connection, early warning subassembly with emergency cut -off subassembly electric connection, emergency cut -off subassembly respectively with elevator drive motor's safety circuit and elevator car's door lock circuit electric connection, operation detection subassembly installs at the top of elevator car, be used for real -time collection elevator average acceleration data and elevator operation speed data to send to early warning subassembly, early warning subassembly is used for receiving elevator average acceleration data and elevator operation speed data that operation detection subassembly sent, and calculates elevator actual braking distance, and with preset braking distance threshold range comparison to the elevator actual braking distance that calculates obtains, issues early warning when elevator actual braking distance exceeds braking distance threshold range, and through emergency cut -off subassembly cut -off elevator drive motor's safety circuit and elevator car's door lock circuit.

[0008] Preferably, the operation detection component includes a first structural housing, a speed detection module and a first power supply. A bottom surface of the first structural housing is provided with a magnetic structure to mount the first structural housing on the top of the elevator car through the magnetic structure. The speed detection module and the first power supply are both mounted in the first structural housing. The speed detection module is in communication connection with the early warning component to collect the elevator average acceleration data and the elevator operation speed data in real time and send to the early warning component. The first power supply is in electric connection with the speed detection module to supply power to the speed detection module.

[0009] Preferably, the emergency cut-off component includes a safety circuit cut-off module and a door lock circuit cut-off module. The safety circuit cut-off module is mounted on the elevator drive motor and is in electric connection with the safety circuit of the elevator drive motor to cut off the safety circuit of the elevator drive motor. The door lock circuit cut-off module is mounted on the top of the elevator car and is in electric connection with the door lock circuit of the elevator car to cut off the door lock circuit of the elevator car.

[0010] Preferably, the early warning assembly comprises a second structural shell, a data comparison module, a sound early warning module, a remote early warning module and a second power supply, the bottom surface of the second structural shell is provided with a magnetic structure to install the second structural shell on the top of the elevator car through the magnetic structure, the data comparison module, the sound early warning module, the remote early warning module and the second power supply are all installed in the second structural shell, the data comparison module is in communication connection with the speed detection module to receive the elevator average acceleration data and the elevator running speed data sent by the speed detection module and calculate the actual braking distance of the elevator; and compare the calculated actual braking distance of the elevator with the preset braking distance threshold range, the data comparison module is in electrical connection with the sound early warning module, the remote early warning module, the safety circuit cut-off module and the door lock circuit cut-off module to send early warning through the sound early warning module and the remote early warning module when the actual braking distance of the elevator exceeds the braking distance threshold range; and when the value of the actual braking distance of the elevator exceeding the braking distance threshold range reaches a predetermined value, cut off the safety circuit of the elevator drive motor through the safety circuit cut-off module and cut off the door lock circuit of the elevator car through the door lock circuit cut-off module, the second power supply is in electrical connection with the data comparison module, the sound early warning module and the remote early warning module to supply power to the data comparison module, the sound early warning module and the remote early warning module.

[0011] Preferably, the elevator abnormal working condition early warning and cut-off device further comprises a weighing detection assembly, the weighing detection assembly comprises a tension detection module, the tension detection module is used to measure the tension of the car steel wire rope and the tension of the elevator counterweight steel wire rope respectively, and is used to calculate the preset braking distance threshold range.

[0012] The elevator abnormal working condition early warning and cutting device comprises a running detection assembly, an emergency cutting assembly and an early warning assembly. The early warning assembly is in communication connection with the running detection assembly, and the early warning assembly is in electrical connection with the emergency cutting assembly. The emergency cutting assembly is in electrical connection with a safety loop of an elevator drive motor and a door lock loop of an elevator car respectively. The running detection assembly is installed on the top of the elevator car, and is used for collecting elevator average acceleration data and elevator running speed data in real time and sending the data to the early warning assembly. The early warning assembly is used for receiving the elevator average acceleration data and the elevator running speed data sent by the running detection assembly, calculating an actual braking distance of the elevator, comparing the actual braking distance of the elevator with a preset braking distance threshold range, and issuing a warning when the actual braking distance of the elevator exceeds the braking distance threshold range, and cutting the safety loop of the elevator drive motor and the door lock loop of the elevator car through the emergency cutting assembly. In this way, the early warning assembly calculates the actual braking distance of the elevator through the elevator average acceleration data and the elevator running speed data collected by the running detection assembly, compares the actual braking distance of the elevator with the preset braking distance threshold range, and reminds the staff to perform inspection and maintenance operation on the elevator when there is a deviation between the actual braking distance of the elevator and the preset braking distance threshold range. Since the normal operation of the elevator braking system is an important part of ensuring the safe operation of the elevator, the comparison of the actual braking distance of the elevator with the preset braking distance threshold range can find the safety hazards existing in the operation of the elevator, thereby preventing the occurrence of safety accidents in advance. Meanwhile, when the actual braking distance of the elevator deviates from the preset braking distance threshold range too much, the safety loop of the elevator drive motor and the door lock loop of the elevator car can be cut through the emergency cutting assembly, so that the elevator is braked and the elevator door is locked, thereby preventing the occurrence of elevator safety accidents. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective view of the elevator abnormal working condition early warning and cutting device of the present application.

[0014] Figure 2 is a perspective view of the elevator drive motor of the present application.

[0015] Figure 3 is a perspective view of the elevator car of the present application.

[0016] Figure 4 is a perspective view of the Figure 3 is a partial enlarged view of area A in the

[0017] In the figure: elevator abnormal working condition early warning and cutting device 10, running detection assembly 20, emergency cutting assembly 30, safety loop cutting module 31, door lock loop cutting module 32, early warning assembly 40, weighing detection assembly 50. DETAILED DESCRIPTION

[0018] The technical scheme and technical effects of the utility model embodiment are further described in detail below with reference to the drawings of the utility model.

[0019] Please refer to Figure 1 The utility model provides a kind of elevator abnormal working condition early warning and cut-off device 10, including operation detection component 20, emergency cut-off component 30 and early warning component 40, early warning component 40 is connected with operation detection component 20 communication, early warning component 40 is electrically connected with emergency cut-off component 30, emergency cut-off component 30 is electrically connected with the safety loop of elevator drive motor and the door lock loop of elevator car respectively, to be used for cutting off the safety loop of elevator drive motor and the door lock loop of elevator car;Operation detection component 20 is installed at the top of elevator car, for real-time acquisition elevator average acceleration data and elevator running speed data, and occurs to early warning component 40;Early warning component 40 is used for receiving the elevator average acceleration data and elevator running speed data that operation detection component 20 occurs, and calculates elevator actual braking distance;And, the elevator actual braking distance calculated is compared with preset braking distance threshold range, to send early warning when elevator actual braking distance exceeds braking distance threshold range, and the safety loop of elevator drive motor and the door lock loop of elevator car are cut off by emergency cut-off component 30;In this way, early warning component 40 calculates elevator actual braking distance by elevator average acceleration data and elevator running speed data collected by operation detection component 20, compares it with preset braking distance threshold range, when deviation exists between the two, reminds staff to carry out inspection and maintenance operation to elevator, since the normal operation of elevator braking system is important component part for guaranteeing the safe operation of elevator, by comparing elevator actual braking distance with preset braking distance threshold range, the security risk existing in the process of elevator operation can be found, to prevent the occurrence of safety accident in advance;Meanwhile, when elevator actual braking distance and preset braking distance threshold range deviate too much, the safety loop of elevator drive motor and the door lock loop of elevator car can be cut off by emergency cut-off component 30 respectively, so that elevator emergency brake and lock elevator door, prevent the occurrence of elevator safety accident.

[0020] Further, operation detection component 20 includes first structure shell, speed detection module and first power supply, the bottom surface of first structure shell is equipped with magnetic structure, to install first structure shell on the top of elevator car by magnetic structure, speed detection module and first power supply are all installed in first structure shell, speed detection module is connected with early warning component 40 communication, for real-time acquisition elevator average acceleration data and elevator running speed data, and send to early warning component 40, first power supply and speed detection module are electrically connected, for power supply to speed detection module.

[0021] In the embodiment, the speed detection module is a three-axis acceleration sensor, so as to obtain the average acceleration data of the elevator and calculate the running speed data of the elevator according to the average acceleration data of the elevator.

[0022] Further, the emergency cut-off assembly 30 comprises a safety circuit cut-off module 31 and a door lock circuit cut-off module 32. The safety circuit cut-off module 31 is installed on the elevator drive motor and electrically connected with the safety circuit of the elevator drive motor, so as to cut off the safety circuit of the elevator drive motor, thereby stopping the elevator car in an emergency when the actual braking distance of the elevator deviates from the preset braking distance threshold range by a large margin. The door lock circuit cut-off module 32 is installed on the top of the elevator car and electrically connected with the door lock circuit of the elevator car, so as to cut off the door lock circuit of the elevator car, thereby preventing the doors of the elevator car from being automatically opened and causing harm to passengers in the elevator.

[0023] Further, the early warning assembly 40 comprises a second structural housing, a data comparison module, a sound early warning module, a remote early warning module and a second power supply. The bottom surface of the second structural housing is provided with a magnetic structure, so as to install the second structural housing on the top of the elevator car by the magnetic structure. The data comparison module, the sound early warning module, the remote early warning module and the second power supply are all installed in the second structural housing. The data comparison module is in communication connection with the speed detection module, so as to receive the average acceleration data and the running speed data of the elevator sent by the speed detection module and calculate the actual braking distance of the elevator. Further, the data comparison module is electrically connected with the sound early warning module, the remote early warning module, the safety circuit cut-off module 31 and the door lock circuit cut-off module 32. When the actual braking distance of the elevator exceeds the braking distance threshold range, the sound early warning module and the remote early warning module are used to give a warning. Specifically, the passengers are notified by the sound early warning module and the elevator maintenance personnel are notified by the remote early warning module. When the value of the actual braking distance of the elevator exceeding the braking distance threshold range reaches a predetermined value, the safety circuit cut-off module 31 is used to cut off the safety circuit of the elevator drive motor and the door lock circuit cut-off module 32 is used to cut off the door lock circuit of the elevator car.

[0024] In the embodiment, the remote early warning module is a short message sending device, so as to send a short message to the mobile phone of the elevator maintenance personnel and remind the elevator maintenance personnel.

[0025] In the embodiment, the data comparison module comprises a processor and a storage, the processor is configured to calculate the actual braking distance of the elevator and compare the actual braking distance with the preset braking distance threshold range, and activate the sound warning module, the remote warning module, the safety circuit cut-off module and the door lock circuit cut-off module when the actual braking distance of the elevator exceeds the braking distance threshold range, and the storage is configured to store the preset braking distance threshold range calculated in advance, further, the processor is a device with a calculation function, for example, a single-chip microcomputer, and the storage is a device with a data storage function, for example, a memory card.

[0026] Further, the elevator abnormal working condition warning and cut-off device 10 further comprises a weighing detection assembly 50, the weighing detection assembly 50 comprises a tension detection module, the tension detection module is configured to measure the tension of the car steel wire rope and the tension of the elevator counterweight steel wire rope respectively, so as to obtain the weight of the car and the weight of the elevator counterweight, and calculate the preset braking distance threshold range.

[0027] In the embodiment, the tension detection module is a steel wire rope tension sensor.

[0028] Embodiment 1, obtaining step of the preset braking distance threshold range

[0029] 1. Simultaneously clamp the multiple steel wire ropes on one side of the car top pulley of the elevator using the tension detection module, so as to collect the tension F of the steel wire ropes on the side of the car top counter-pulley;

[0030] 2. Simultaneously clamp the multiple steel wire ropes on one side of the counterweight counter-pulley of the elevator using the tension detection module, so as to collect the tension F' of the steel wire ropes on the side of the counterweight counter-pulley;

[0031] 3. Calculate the weight of the elevator car and the weight of the elevator counterweight by the following formula:

[0032] P = 2 * F Formula 1

[0033] W = 2 * F' Formula 2

[0034] Wherein, P is the weight of the elevator car, and W is the weight of the elevator counterweight.

[0035] 4. Obtain the balance coefficient by the following formula:

[0036] q = (W - P) / Q Formula 3

[0037] Wherein, q is the balance coefficient, and Q is the rated load of the elevator car.

[0038] 5. Obtain the correction coefficient β1 from the following table according to the balance coefficient:

[0039] Table 1

[0040] q 0.40 0.42 0.44 0.45 0.46 0.48 0.50 β1 1.18 1.11 1.03 1.00 0.96 0.90 0.82

[0041] 6. The correction coefficient β2 is obtained by the elevator car weight in the following table;

[0042] Table 2

[0043]

[0044] 7. The corrected elevator braking distance maximum L'max is calculated by the following calculation formula:

[0045] L'max = (Lmax - vt) / β1β2 + vt Formula 4

[0046] Wherein, v is the rated speed of the elevator, t is a constant of 0.2s, and Lmax is obtained by the following table:

[0047] Table 3

[0048]

[0049]

[0050] 8. The corrected elevator braking capacity judgment qualified range is Lmin~L'max, wherein Lmin is the corresponding Lmin in Table 3 corresponding to Lmax.

[0051] 9. The preset braking distance threshold range is set to Lmin~L'max.

[0052] Wherein, the rated load of the elevator car and the rated speed of the elevator can be obtained from the factory information of the elevator.

[0053] Example 2, comparison process of data comparison module

[0054] 1. The elevator average acceleration data a and the elevator running speed data V are obtained by the speed detection module respectively;

[0055] 2. The elevator actual braking distance L of the elevator is obtained by the following calculation formula:

[0056] L = V 2 / 2a + vt Formula 5

[0057] Wherein, t is a constant of 0.2s;

[0058] 3. The elevator actual braking distance L of the elevator is compared with the preset braking distance threshold range Lmin~L'max, if L is between Lmin~L'max, the elevator runs normally, if L is not between Lmin~L'max, the elevator runs abnormally, and the severity of the elevator running abnormally is judged according to the size of L exceeding the range of Lmin~L'max;

[0059] 4. When the value of L is slightly out of the range of Lmin~L'max, the passengers are reminded by the sound warning module, and the elevator inspection and maintenance personnel are reminded by the remote warning module; when the value of L is greatly out of the range of Lmin~L'max, the elevator is stopped and locked by the emergency cut-off assembly 30, at the same time, the passengers are reminded by the sound warning module, and the elevator inspection and maintenance personnel are reminded by the remote warning module.

[0060] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An elevator abnormal operating condition early warning and cut-off device, characterized in that, The system includes a running detection component, an emergency cut-off component, and an early warning component. The early warning component is communicatively connected to the running detection component and electrically connected to the emergency cut-off component. The emergency cut-off component is electrically connected to the safety circuit of the elevator drive motor and the door lock circuit of the elevator car, respectively. The running detection component is installed on the top of the elevator car and is used to collect the elevator's average acceleration data and elevator running speed data in real time, and send them to the early warning component. The early warning component is used to receive the elevator's average acceleration data and elevator running speed data sent by the operation detection component, and to calculate the elevator's actual braking distance. In addition, the calculated actual braking distance of the elevator is compared with the preset braking distance threshold range, so as to issue an early warning when the actual braking distance of the elevator exceeds the braking distance threshold range, and to cut off the safety circuit of the elevator drive motor and the door lock circuit of the elevator car through the emergency cut-off component.

2. The elevator abnormal operating condition early warning and cut-off device as described in claim 1, characterized in that, The operation detection component includes a first structural housing, a speed detection module, and a first power supply. The bottom surface of the first structural housing is provided with a magnetic structure to install the first structural housing on the top of the elevator car through the magnetic structure. The speed detection module and the first power supply are both installed inside the first structural housing. The speed detection module is communicatively connected to the early warning component and is used to collect the elevator's average acceleration data and elevator operating speed data in real time and send them to the early warning component. The first power supply is electrically connected to the speed detection module and is used to supply power to the speed detection module.

3. The elevator abnormal operating condition early warning and cut-off device as described in claim 2, characterized in that, The emergency cut-off assembly includes a safety circuit cut-off module and a door lock circuit cut-off module. The safety circuit cut-off module is installed on the elevator drive motor and electrically connected to the safety circuit of the elevator drive motor to cut off the safety circuit of the elevator drive motor. The door lock circuit cut-off module is installed on the top of the elevator car and electrically connected to the door lock circuit of the elevator car to cut off the door lock circuit of the elevator car.

4. The elevator abnormal operating condition early warning and cut-off device as described in claim 3, characterized in that, The early warning component includes a second structural housing, a data comparison module, an audible early warning module, a remote early warning module, and a second power supply. The bottom surface of the second structural housing is provided with a magnetic structure to install the second structural housing on the top of the elevator car. The data comparison module, audible early warning module, remote early warning module, and second power supply are all installed inside the second structural housing. The data comparison module is communicatively connected to the speed detection module to receive the elevator's average acceleration data and elevator running speed data sent by the speed detection module, and to calculate the elevator's actual braking distance. Furthermore, the calculated actual braking distance of the elevator is compared with a preset braking distance threshold range. The data comparison module is electrically connected to the sound warning module, the remote warning module, the safety circuit cutoff module, and the door lock circuit cutoff module. When the actual braking distance of the elevator exceeds the braking distance threshold range, a warning is issued through the sound warning module and the remote warning module. When the value of the actual braking distance exceeding the braking distance threshold range reaches a predetermined value, the safety circuit of the elevator drive motor is cut off through the safety circuit cutoff module, and the door lock circuit of the elevator car is cut off through the door lock circuit cutoff module. The second power supply is electrically connected to the data comparison module, the sound warning module, and the remote warning module to supply power to the data comparison module, the sound warning module, and the remote warning module.

5. The elevator abnormal operating condition early warning and cut-off device as described in claim 4, characterized in that, The elevator abnormal condition warning and cut-off device also includes a weighing detection component, which includes a tension detection module. The tension detection module is used to measure the tension of the car wire rope and the tension of the elevator counterweight wire rope respectively, and to calculate the preset braking distance threshold range.

Images