Elevator starved condition detection system and method

Abstract

The application relates to an elevator star blocking state detection system and method, and relates to the technical field of elevator detection. The system comprises a motor, an elevator control module, a main contactor and a star blocking and detection circuit. The star blocking and detection circuit comprises a star blocking contactor, at least one power-on delay time relay, at least one intermediate relay and at least one capacitor. The star blocking contactor is connected with a star blocking feedback interface, at least one power-on delay time relay and at least one intermediate relay. In the case that the motor, the main contactor and the elevator control module are in a normal control state, the detection circuit with the power-on delay time relay and the intermediate relay is arranged corresponding to the star blocking contactor. In the case that the circuit is connected, the on-off of the detection relay is detected, the electric signal is fed back to the star blocking feedback interface, the elevator control module can know whether the elevator star blocking is abnormal, and the detection safety of the elevator star blocking state is improved.

Description

Technical Field

[0001] This application relates to the field of elevator inspection technology, specifically an elevator sealing status detection system and method. Background Technology

[0002] Currently, most elevators use permanent magnet synchronous motors as their drive units. The shaft of the permanent magnet synchronous motor is directly connected to the drive wheel. If the brake fails during operation, it can easily cause serious accidents such as runaway or bottoming out. Therefore, many elevator manufacturers have added a star-sealed control circuit as an electrical braking system. In the event of brake failure, the star-sealed control circuit can generate reverse torque, maintaining the motor at a stable low speed and ensuring passenger safety.

[0003] In related technologies, in order to ensure appropriate reverse torque under the motor's star-sealing condition, it is often necessary to connect capacitors of appropriate specifications in series with the three-phase coils of the motor.

[0004] However, if the star-sealing circuit with the series capacitor experiences an open circuit, capacitor breakdown, or incorrect wiring during use, the elevator still faces the risk of brake failure as described above. In other words, among related technologies, elevator star-sealing technology has relatively low safety. Summary of the Invention

[0005] This application relates to an elevator sealing status detection system and method, which can improve the safety of elevator sealing status detection.

[0006] On the one hand, an elevator sealing status detection system is provided, characterized in that the system includes a motor, an elevator control module, a main contactor, and a sealing and detection circuit; The motor and elevator control module are connected via a main contactor, which is used to control the start and stop of the system. The elevator control module includes a satellite control interface and a satellite feedback interface; The sealing and detection circuit includes a sealing contactor, at least one energizing delay time relay, at least one intermediate relay, and at least one capacitor; The sealing contactor is connected to the sealing feedback interface, at least one energized delay time relay and at least one intermediate relay. The at least one energized delay time relay and at least one intermediate relay are used to detect the contact status of the sealing contactor. The sealing contactor is connected to the main contactor.

[0007] In one optional embodiment, the sealing and detection circuit has three phase lines; Each of the three phase lines is equipped with a capacitor.

[0008] In one optional embodiment, there are two power-on delay time relays, namely a first power-on delay time relay and a second power-on delay time relay; There are four intermediate relays: the first intermediate relay, the second intermediate relay, the third intermediate relay, and the fourth intermediate relay. The first intermediate relay, the second intermediate relay, the third intermediate relay, the fourth intermediate relay, and the first energizing delay time relay are connected in parallel and then connected in series with the switch of the second intermediate relay. The second intermediate relay is connected in parallel with the second energizing delay time relay, and then connected in series with the switch of the first energizing delay time relay. The switch of the third intermediate relay is connected in series with the switch of the fourth intermediate relay, and is connected in parallel with the switch of the second energization delay time relay, and then connected in series with the first intermediate relay. The switch of the sealing contactor is connected in series with the first energizing delay time relay.

[0009] In an optional embodiment, the switch of the sealing contactor and the switch of the first intermediate relay form a circuit, and the two ends of the circuit are the sealing feedback ports; The sealing contactor and the main contactor form a circuit, and the two ends of the circuit are the sealing control ports.

[0010] In an optional embodiment, the switch of the sealing contactor is connected in parallel with the switch of the first intermediate relay; or, The switch of the sealing contactor is connected in series with the switch of the first intermediate relay.

[0011] In an optional embodiment, the switch of the first intermediate relay is implemented as a normally open contact; The second intermediate relay is implemented as a normally open contact; The first power-on delay time relay is implemented as a normally open contact; The second power-on delay time relay is implemented as a normally open contact.

[0012] In an optional embodiment, the system further includes a first ribbon cable terminal; The first row of terminals connects between the main contactor and the motor.

[0013] In an optional embodiment, the sealing and detection circuit further includes a second ribbon cable terminal; The second row of terminals is connected between the main contactor and the sealing contactor.

[0014] In an optional embodiment, the satellite is sealed and the detection circuit and the motor is grounded.

[0015] On the other hand, a method for detecting the star-locking status of an elevator is provided. This method is applied to the elevator control system within any of the aforementioned elevator star-locking status detection systems. The method includes: Receives a power-on signal, which indicates that the elevator star-shaped status detection system is powered on; In response to power-on and after a preset time, the closed state of the corresponding star-sealing loop is determined through the star-sealing feedback interface; If the loop corresponding to the satellite sealing feedback interface meets the first loop condition, the satellite sealing loop is confirmed to be normal. If the loop corresponding to the star-sealing feedback interface meets the second loop condition, the star-sealing loop is determined to be abnormal.

[0016] The beneficial effects of the technical solution provided in this application include at least the following: When the motor, main contactor, and elevator control module are in normal control mode, a detection circuit with a power-on delay time relay and an intermediate relay is set up for the corresponding sealing contactor. When the line is connected, the electrical signal is fed back to the sealing feedback interface by detecting the on / off state of the relay, so that the elevator control module can know whether there is an abnormality in the elevator sealing status, thereby improving the detection safety of the elevator sealing status. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of an elevator sealing status detection system provided in an exemplary embodiment of this application is shown.

[0019] Figure 2 A schematic diagram of the specific structure of an elevator sealing status detection system provided in an exemplary embodiment of this application is shown.

[0020] Figure 3 A schematic diagram of the specific structure of an elevator sealing status detection system provided in an exemplary embodiment of this application is shown.

[0021] Figure 4 The diagram shows a flowchart of an elevator sealing status detection method provided in this application. Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0023] Figure 1 This invention provides a schematic diagram of the structure of an elevator sealing status detection system according to an exemplary embodiment of this application. Please refer to the diagram. Figure 1 The system includes a motor 110, an elevator control module 120, a main contactor 130, and a sealing and detection circuit 140. The motor 110 is connected to the elevator control module 120 via the main contactor 130, which controls the system's start and stop. The elevator control module 120 includes a sealing control interface 121 and a sealing feedback interface 122. The sealing and detection circuit 140 includes a sealing contactor 141, at least one energized delay time relay 142, at least one intermediate relay 143, and at least one capacitor 144. The sealing contactor 141 is connected to the sealing feedback interface 122, at least one energized delay time relay 142, and at least one intermediate relay 143. The at least one energized delay time relay 142 and at least one intermediate relay 143 are used to detect the contact status of the sealing contactor. The sealing contactor 141 is connected to the main contactor 130.

[0024] The embodiments of this application do not limit the specific type of motor.

[0025] In this embodiment, the closing and opening of the main contactor controls the operation and stop of the system circuit. Optionally, when the main contactor is closed, the elevator star-shaped status detection system starts working.

[0026] In this embodiment, the elevator control module is implemented as a combination of a power supply module, an elevator control motherboard, a frequency converter, and a circuit breaker. The specific implementation of the elevator control module is related to the type of elevator; this embodiment does not limit the specific implementation of the elevator controller. In one example, the power supply module is model NKY3-350-24, the frequency converter is model FRN11GX1S-4C, and the circuit breaker is model DZ47-60MC 3P 32A.

[0027] In this embodiment of the application, the sealing and detection circuit is used to detect the working state of the capacitor therein.

[0028] In summary, the system provided in this application embodiment, when the motor, main contactor, and elevator control module are in normal control state, has a detection circuit with a power-on delay time relay and an intermediate relay set for the corresponding sealing contactor. When the line is connected, the electrical signal is fed back to the sealing feedback interface by detecting the on / off state of the relay, so that the elevator control module can know whether there is an abnormality in the elevator sealing, thereby improving the detection safety of the elevator sealing state.

[0029] Figure 2 and Figure 3The following is a schematic diagram of the specific structure of the two elevator sealing star status detection systems provided in this application. Next, the elevator sealing star status detection systems described in this application will be further explained in conjunction with the specific structural diagrams.

[0030] Please refer to Figure 2 as well as Figure 3 The sealing and detection circuit has three phase lines, and each of the three phase lines is equipped with a capacitor 210. That is, in this embodiment, the number of capacitors 210 is 3.

[0031] In an optional embodiment, there are two power-on delay time relays: a first power-on delay time relay 221 and a second power-on delay time relay 222. There are four intermediate relays: a first intermediate relay 231, a second intermediate relay 232, a third intermediate relay 233, and a fourth intermediate relay 234. The first intermediate relay 231, the second intermediate relay 232, the third intermediate relay 233, the fourth intermediate relay 234, and the first power-on delay time relay 221 are connected in parallel and then connected in series with the switch of the second intermediate relay 232. The second intermediate relay 232 and the second power-on delay time relay 222 are connected in parallel and then connected in series with the switch of the first power-on delay time relay 221. The switch of the third intermediate relay 233 is connected in series with the switch of the fourth intermediate relay 234, and is also connected in parallel with the switch of the second power-on delay time relay 222 before being connected in series with the first intermediate relay 231. The switch of the sealing contactor 240 is connected in series with the first power-on delay time relay 231.

[0032] exist Figure 2 as well as Figure 3 In the embodiment shown, the switch of the sealing contactor 240 and the switch of the first intermediate relay 231 form a circuit, and the two ends of the circuit are the sealing feedback port 251. The sealing contactor 240 and the main contactor 260 form a circuit, and the two ends of the circuit are the sealing control port 252.

[0033] In an optional embodiment, such as Figure 2 As shown, the switch of the sealing contactor 240 is connected in parallel with the switch of the first intermediate relay; or, as... Figure 3 As shown, the switch of the sealing contactor is connected in series with the switch of the first intermediate relay.

[0034] correspond Figure 2 as well as Figure 3 In this case, the switch of the first intermediate relay is implemented as a normally open contact; the switch of the second intermediate relay is implemented as a normally open contact; the switch of the first energizing delay time relay is implemented as a normally open contact; and the switch of the second energizing delay time relay is implemented as a normally open contact.

[0035] In an optional embodiment, please refer to Figure 2 as well as Figure 3 The system also includes a first ribbon terminal 271, which is connected between the main contactor 260 and the motor 280. The sealing and detection circuit also includes a second ribbon terminal 272, which is connected between the main contactor 260 and the sealing contactor 240.

[0036] In an optional embodiment, the satellite is sealed and the detection circuit and the motor is grounded.

[0037] Based on the above structural description, the working principle of the system and the specific detection method involved in the embodiments of this application are explained: Figure 2 The specific testing method is as follows: After power-on, the first intermediate relay is energized, and its normally open contact closes. At this time, the star-sealing and detection circuit, that is, the circuit corresponding to the star-sealing feedback port, works normally, feeding back the operating status of the star-sealing contactor to the elevator control system. When the elevator is stopped and in standby mode, the auxiliary switch of the star-sealing contactor closes, the first power-on delay time relay is energized, and starts timing. After a set time t1, the first power-on delay time relay operates, and its normally open contact operates, energizing the second intermediate relay. The normally open contact of the second intermediate relay operates, energizing the sub-circuit of the corresponding phase. Under normal conditions of the star-sealing circuit, the other two phases will also be energized, and the third and fourth intermediate relays will operate. At the same time, the second power-on delay time relay operates and starts timing. After a set time t2, its normally closed contact operates, disconnecting the power supply circuit of the first intermediate relay. If the contacts of the first energizing delay time relay operate, and after time t2, the third and fourth intermediate relays are still not fully energized, the coil circuit corresponding to the first intermediate relay will be disconnected, causing the normally open contacts of the first intermediate relay to fail to close. At this time, the star-sealing feedback circuit will be disconnected, and it will be determined as a star-sealing circuit abnormality fault. If the contacts of the first energizing delay time relay operate, and after time t2 or less, the third and fourth intermediate relays are fully energized, the star-sealing feedback circuit will close, and it will be determined as a normal star-sealing circuit.

[0038] If the elevator starts running during the testing process, the coil circuit of the first power-on delay time relay will be immediately disconnected. The normally open contact of the first power-on delay time relay will immediately disconnect the coil power supply circuit of the second intermediate relay and the second power-on delay time relay. Then, the three normally open contacts of the second intermediate relay will immediately open, so that the sealing detection unit is disconnected from the elevator sealing main circuit, preventing the detection circuit from burning out and ensuring the normal operation of the elevator.

[0039] Figure 3The specific testing method is as follows: After power-on, the first intermediate relay is energized, and its normally open contact closes. At this time, the star-sealing and detection circuit, that is, the circuit corresponding to the star-sealing feedback port, works normally, feeding back the operating status of the star-sealing contactor to the elevator control system. When the elevator is stopped and in standby mode, the auxiliary switch of the star-sealing contactor closes, the first power-on delay time relay is energized, and starts timing. After a set time t1, the first power-on delay time relay operates, and its normally open contact operates, energizing the second intermediate relay. The normally open contact of the second intermediate relay operates, energizing the sub-circuit of the corresponding phase. Under normal conditions of the star-sealing circuit, the other two phases will also be energized, and the third and fourth intermediate relays will operate. At the same time, the second power-on delay time relay operates and starts timing. After a set time t2, its normally closed contact operates, disconnecting the power supply circuit of the first intermediate relay. If the contacts of the first energizing delay time relay operate, and after time t2, the third and fourth intermediate relays are still not fully energized, the coil circuit corresponding to the first intermediate relay will be disconnected, causing the normally closed contacts of the first intermediate relay to fail to open. At this time, the star-sealing feedback circuit will be closed, and it will be determined as a star-sealing circuit abnormality fault. If the contacts of the first energizing delay time relay operate, and after time t2 or less, the third and fourth intermediate relays are fully energized, the star-sealing feedback circuit will be disconnected, and it will be determined as a normal star-sealing circuit.

[0040] If the elevator starts running during the testing process, the coil circuit of the first power-on delay time relay will be immediately disconnected. The normally open contact of the first power-on delay time relay will immediately disconnect the coil power supply circuit of the second intermediate relay and the second power-on delay time relay. Then, the three normally open contacts of the second intermediate relay will immediately open, so that the sealing detection unit is disconnected from the elevator sealing main circuit, preventing the detection circuit from burning out and ensuring the normal operation of the elevator.

[0041] Based on the above explanation, Figure 4 The diagram illustrates a flowchart of an elevator star-locking status detection method provided in this application. This method is applied to the elevator control system within any of the aforementioned elevator star-locking status detection systems. The method includes: Step 401: Receive the power-on signal, which indicates that the elevator sealing status detection system is powered on.

[0042] Step 402: In response to power-on and after a preset time, determine the closed state of the sealing loop corresponding to the sealing feedback interface through the sealing feedback interface.

[0043] In the embodiments of this application, the closing time is t1+t2.

[0044] Step 403: In response to the fact that the loop corresponding to the satellite sealing feedback interface meets the first loop condition, it is determined that the satellite sealing loop is normal.

[0045] correspond Figure 2 In the scenario shown, the first loop condition is that the satellite sealing feedback loop is closed; corresponding to Figure 3 As shown, the first loop condition is that the satellite feedback loop is disconnected.

[0046] Step 404: In response to the loop corresponding to the satellite sealing feedback interface meeting the second loop condition, the satellite sealing loop is determined to be abnormal.

[0047] correspond Figure 2 The situation shown indicates that the second loop condition is that the satellite feedback loop is disconnected; corresponding to Figure 3 As shown, the second loop condition is that the satellite feedback loop is closed.

[0048] In summary, the method provided in this application embodiment, when the motor, main contactor, and elevator control module are in normal control state, sets up a detection circuit with a power-on delay time relay and an intermediate relay for the corresponding sealing contactor. When the line is connected, the electrical signal is fed back to the sealing feedback interface by detecting the on / off state of the relay, so that the elevator control module can know whether there is an abnormality in the elevator sealing, thereby improving the detection safety of the elevator sealing state.

[0049] The above are merely optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An elevator sealing status detection system, characterized in that, The system includes a motor, an elevator control module, a main contactor, and a sealing and detection circuit; The motor is connected to the elevator control module via the main contactor, which is used to control the start and stop of the system. The elevator control module includes a satellite control interface and a satellite feedback interface. The sealing and detection circuit includes a sealing contactor, at least one energizing delay time relay, at least one intermediate relay, and at least one capacitor; The sealing contactor is connected to the sealing feedback interface, at least one energized delay time relay, and at least one intermediate relay. The at least one energized delay time relay and at least one intermediate relay are used to detect the contact status of the sealing contactor. The sealing contactor is connected to the main contactor.

2. The system according to claim 1, characterized in that, The sealing and detection circuit has three phase lines; Each of the three phase lines is equipped with a capacitor.

3. The system according to claim 2, characterized in that, The number of the power-on delay time relays is two, namely a first power-on delay time relay and a second power-on delay time relay; The number of intermediate relays is four, namely, the first intermediate relay, the second intermediate relay, the third intermediate relay, and the fourth intermediate relay; The first intermediate relay, the second intermediate relay, the third intermediate relay, the fourth intermediate relay, and the first power-on delay time relay are connected in parallel and then connected in series with the switch of the second intermediate relay. The second intermediate relay is connected in parallel with the second energizing delay time relay, and then connected in series with the switch of the first energizing delay time relay; The switch of the third intermediate relay is connected in series with the switch of the fourth intermediate relay, and is connected in parallel with the switch of the second power-on delay time relay, and then connected in series with the first intermediate relay. The switch of the sealing contactor is connected in series with the first energizing delay time relay.

4. The system according to claim 3, characterized in that, The switch of the sealing contactor and the switch of the first intermediate relay form a circuit, and the two ends of the circuit are the sealing feedback ports; The sealing contactor and the main contactor form a circuit, and the two ends of the circuit are sealing control ports.

5. The system according to claim 4, characterized in that, The switch of the sealing contactor is connected in parallel with the switch of the first intermediate relay; or, The switch of the sealing contactor is connected in series with the switch of the first intermediate relay.

6. The system according to claim 3, characterized in that, The first intermediate relay is implemented as a normally open contact; The second intermediate relay is implemented as a normally open contact; The first power-on delay time relay is implemented as a normally open contact; The second energizing delay time relay is implemented as a normally open contact.

7. The system according to claim 3, characterized in that, The system also includes a first ribbon cable terminal; The first ribbon cable terminal is connected between the main contactor and the motor.

8. The system according to claim 3, characterized in that, The sealing and detection circuit also includes a second row of wire terminals; The second ribbon cable terminal is connected between the main contactor and the sealing contactor.

9. The system according to claim 3, characterized in that, The sealing and detection circuit and the motor grounding.

10. A method for detecting the sealing status of an elevator, characterized in that, The method is applied to the elevator control system within the elevator sealing status detection system as described in any one of claims 1 to 8, and the method includes: Receives a power-on signal, the power-on signal indicating that the elevator sealing status detection system is powered on; In response to power-on and after a preset time, the closed state of the star-sealing loop corresponding to the star-sealing feedback interface is determined through the star-sealing feedback interface; The system is confirmed to be functioning normally upon the closure of the loop corresponding to the satellite sealing feedback interface. If the loop corresponding to the satellite sealing feedback interface is not closed, it is determined that the satellite sealing loop is abnormal.

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