CN114314223A - Controller of hydraulic safety gear of elevator and control method thereof - Google Patents

Abstract

The invention provides an elevator hydraulic safety gear controller and a control method thereof. The elevator hydraulic safety gear controller includes a main control board and a display; the display is provided with a display and setting interface, which has or is connected with a number of buttons; The main control board is provided with a floor position sensor interface, a solenoid valve switch interface, a pressure sensor interface, a pressurized oil pump interface, a safety relay interface and a signal detection switch interface; the elevator hydraulic safety gear control method is to first set a target The pressure value and the lower limit of pressurization, and then perform the following steps: S1, start the pressurized oil pump to pressurize until the system pressure reaches the target pressure value; S2, when the system pressure reaches the target pressure value, close the pressurization pump, and continue to detect pressure state; S3, when the system pressure drops below the lower pressure limit value, restart the pressure pump to pressurize until the target pressure value is reached; cyclically execute steps S2-S3 to maintain the system pressure.

Description

Elevator hydraulic safety gear controller and its control method

technical field

The invention provides an elevator hydraulic safety gear controller and a control method thereof.

Background technique

The hydraulic safety gear is used in the Safety Catch system to realize the braking of the elevator car, so the pressure stability of the pressurized oil pump is very important. Due to the pressure relief of the pressurized oil pump and other reasons, the system pressure is not stable, which is a safety risk.

SUMMARY OF THE INVENTION

The invention provides an elevator hydraulic safety gear controller and a control method thereof, which are used to solve the pressure control problem of the pressurized oil pump in the Safety Catch system, which is specifically realized by the following technical means:

The elevator hydraulic safety gear controller of the present invention includes a main control board and a display; the display is provided with a display and setting interface, which has or is connected with several buttons; the main control board is provided with a floor position sensor interface and a solenoid valve switch Interface, pressure sensor interface, pressurized oil pump interface, safety relay interface and signal detection switch interface; the floor position sensor interface is used to connect to the floor position sensor of the elevator, which includes UCMP feet, and CH feet and CL used for CAN communication The solenoid valve switch interface includes several sets of solenoid valves, wherein at least one set of solenoid valves is associated with the UCMP pin, which is valid when the UCMP pin is at a high level; the pressure sensor interface is used for docking a pressure sensor to continuously detect the system pressure state; the pressurized oil pump interface is used to connect and drive the pressurized oil pump, and the signal frequency and duty cycle can be set; the safety relay interface is used to connect and control the on-off of the safety relay of the elevator;

The main control board is configured to: start the pressurized oil pump through the pressurized oil pump interface to pressurize until the system pressure reaches the preset target pressure value, then close the pressurized oil pump and continuously detect the pressure state; if the system pressure When it falls below the preset lower pressure limit, restart the pressurized oil pump to pressurize until the target pressure value is reached; this cycle maintains the system pressure.

In one or more embodiments of the present invention, the main control board is provided with a call switch interface, and the call switch interface includes a TB pin connected to the up call button, a BB pin connected to the down call button, The TOP pin for receiving the upstream feedback signal and the BM pin for receiving the downstream feedback signal.

In one or more embodiments of the present invention, the control board is provided with a count switch interface, and the count switch interface includes a count relay for outputting the count amount.

In one or more embodiments of the present invention, the main control board is provided with a remote self-checking switch input interface and a remote self-checking switch output interface.

In one or more embodiments of the present invention, the main control board is connected to a switching power supply, the switching power supply has a mains interface and a battery interface, which is powered by the mains by default, and switches to the battery when the mains is disconnected. powered by.

In one or more embodiments of the present invention, the main control board, the switching power supply and the battery are arranged in a box with a flip cover, and the box is provided with wire holes for cables to pass through, so The flip cover is provided with a ring groove adapted to the opening of the box body, and a sealing rubber ring is arranged in the ring groove.

In the elevator hydraulic safety gear control method of the present invention, a target pressure value and a pressure lower limit value are set first, and then the following steps are performed:

S1, start the pressurized oil pump to pressurize until the system pressure reaches the target pressure value;

S2, when the system pressure reaches the target pressure value, the booster pump is turned off, and the pressure state is continuously detected;

S3, when the system pressure drops below the lower pressure limit value, restart the pressure pump to pressurize until the target pressure value is reached;

Steps S2-S3 are executed cyclically to maintain the system pressure.

In one or more embodiments of the present invention, the signal detection switch interface is connected to a travel switch arranged in the mechanical stroke of the pressurized oil pump; a safety pressure value is set;

In step S1, with the increase of the system pressure, when the travel switch is triggered and the main control board detects that the current system pressure reaches the safe pressure value, the safety relay interface of the elevator is triggered to close the safety relay of the elevator.

In one or more embodiments of the present invention, the main control board is provided with a call switch interface, and the call switch interface includes a TB pin connected to the up call button, a BB pin connected to the down call button, The TOP pin for receiving the upstream feedback signal and the BM pin for receiving the downstream feedback signal;

The main control board is provided with an automatic learning mode, and the automatic learning mode is used to execute when the controller is used for the first time, which includes the following steps:

S11, perform an upward call operation with the target floor being the topmost floor through the call switch interface, and monitor the feedback signal of the call button, and continue to call if the feedback signal is not detected;

S12, the elevator runs to the top floor, and after reaching the top floor, the main control board learns the top floor position data through the floor position sensor interface;

S13, after the learning of the top-level position data data is completed, perform the down-call operation with the target floor being the bottommost floor through the call switch interface, and monitor the feedback signal of the call button, and continue to call if the feedback signal is not detected;

S14, the elevator runs to the lowest floor, and after reaching the lowest floor, the main control board learns the floor position data through the floor position sensor interface;

S15, after the learning of the top-level position data is completed, the automatic learning mode is exited.

In one or more embodiments of the present invention, the following conditions are set in the automatic learning mode:

1) The upward call operation needs to wait for T time, and if the feedback signal is received within the T time, the elevator will start to run upward after the T time;

2) The down call operation is carried out immediately after the learning of the top position data data is completed, and the elevator is started to run downward after receiving the feedback signal;

3) The feedback signal is required to be a continuous signal, that is, a feedback signal is made when responding to the call, and the feedback signal is turned off until the target floor of the call is reached;

4) If the feedback signal is not received after waiting for several preset call response times during the elevator call process, the learning mode is exited.

The beneficial effects of the invention are: the technology is applied to the Safety Catch system, the controller is composed of a main control board, a display, a battery and a switching power supply, when the controller is connected to the Safety Catch system, the controller gives the Safety Catch according to the set parameters. The system is pressurized and kept within the set range after the Safety Catch equipment pressure reaches the target pressure value. In addition, the system provides a backup power supply. If the mains power fails, it can be switched to the battery to provide power to maintain the pressure. Generally, when the backup power supply is used, the pressure can be maintained for more than 10 minutes, which increases the safety of the elevator system.

Description of drawings

FIG. 1 is a schematic structural diagram of an elevator hydraulic safety gear controller of the present invention.

FIG. 2 is a schematic diagram of the main control board of the elevator hydraulic safety gear controller of the present invention.

Detailed ways

The application scheme is further described below in conjunction with the accompanying drawings:

1 to 2, the elevator hydraulic safety gear controller includes a main control board 1, a display 2, a switching power supply 3 and a battery 4. The main control board 1, the display 2, the switching power supply 3 and the battery 4 are installed in a flip cover 51. In the box body 52, the box body 52 is provided with a wire hole 53 for cables to pass through, and the flip cover 51 is provided with a ring groove 54 that is adapted to the opening of the box body 52, and the ring groove 54 is provided with Sealing rubber ring 55; the display 2 is installed on the main control board 1, which provides a display and setting interface, which has or is connected with a number of buttons 21; product parameters can be set through the buttons 21 of the display 2, and the display 2 is in normal operation. Real-time display of the status information of the Safety Catch system; the main control board 1 is provided with a floor position sensor interface 101, a solenoid valve switch interface 102, a pressure sensor interface 103, a pressurized oil pump interface 104, a safety relay interface 105, and a signal detection switch interface 106. Call elevator switch interface 107, counting switch interface 108, remote self-checking switch input interface 109, and remote self-checking switch output interface 110; see Table 1 for details.

The floor position sensor interface 101 is used for docking the floor position sensor of the elevator, which includes UCMP pins, and CH pins and CL pins for CAN communication; the solenoid valve switch interface 102 includes solenoid valves V1, V2, V3, wherein Solenoid valves V1 and V2 are associated with the UCMP pin, which is valid when the UCMP pin is at a high level, that is, when the UCMP circuit is disconnected and the UCMP pin level is zero, the solenoid valves V1 and V2 are closed; if the system needs to work, Then it needs to be restarted through the display 2; the pressure sensor interface 103 is used for docking the pressure sensor to continuously detect the system pressure state, which includes the OPS1 pin and the OPS2 pin; the pressurized oil pump interface 104 is used for docking and driving the pressurized oil pump , including the solenoid valve P1 and solenoid valve P2 that can set the signal frequency and duty ratio; the safety relay interface 105 is used to connect and control the on-off of the safety relay SC and the backup safety relay FC of the elevator, which includes connecting the safety relay SC The SC1 pin and SC2 pin of the standby safety relay FC are connected to the FC1 pin and the FC2 pin of the standby safety relay FC; the call switch interface 107 includes the TB1 pin and the TB2 pin connected to the up call button, and the BB1 pin and BB2 of the down call button. pin, the TOP+ pin and the TOP- pin for receiving the upstream feedback signal, the BM+ pin and the BM- pin for receiving the downstream feedback signal; the counting switch interface 108 includes a counting relay COUNT for outputting the counting quantity; the remote self-checking switch The input interface 109 includes a TI1 pin and a TI2 pin, and the remote self-checking switch output interface 110 includes a TO1 pin and a TO2 pin.

Table 1 Interface description table of the main control board

The main control board 1 is configured to: start the pressurized oil pump through the pressurized oil pump interface 104 to pressurize until the system pressure reaches the preset target pressure value, then close the pressurized oil pump and continuously detect the pressure state; if When the system pressure drops below the preset pressure lower limit, restart the pressurized oil pump to pressurize until the target pressure value is reached; this cycle maintains the system pressure.

The main control board 1 is connected to a switching power supply 3, the switching power supply 3 has a mains interface and a battery interface, which is powered by the mains by default, and switches to the battery 4 to supply power when the mains is disconnected. Generally, in the case of backup power supply (lead-acid battery), the pressure can be maintained for more than 10 minutes, which increases the safety of the elevator system.

The elevator hydraulic safety gear control method is to first set the target pressure value of 60Bar, the lower pressure limit value of 50Bar and the safety pressure value of 45Bar, and then perform the following steps:

S1, start the pressurized oil pump to pressurize (the solenoid valve P1 or P2 outputs the driving signal according to the set frequency and duty ratio), until the system pressure reaches the target pressure value of 60Bar; wherein, the signal detection switch interface is connected to the pressurized The travel switch in the mechanical stroke of the oil pump;

During the first pressurization to the target pressure value of 60Bar, as the system pressure increases, when the travel switch is triggered (SCC switch is closed, SCO switch is closed) and the main control board detects that the current system pressure reaches the When the safety pressure value is 45Bar, the safety relay SC and the backup safety relay FC of the elevator are closed by the safety relay interface;

S2, when the system pressure reaches the target pressure value of 60Bar, the booster pump is turned off, and the pressure state is continuously detected;

S3, when the system pressure drops below the lower limit of pressure by 50Bar, restart the pressure pump to pressurize until the target pressure value is reached;

Steps S2-S3 are executed cyclically to keep the system pressure in the range of 50Bar-60Bar.

In addition, in order to realize the matching of different elevator systems, the main control board 1 is provided with an automatic learning mode, and the automatic learning mode includes the following steps:

S11, perform an upward call operation with the target floor being the topmost floor through the call switch interface every 2 seconds, and monitor the feedback signal of the call button, and continue to call if the feedback signal is not detected;

S12, the elevator runs to the top floor, and after reaching the top floor, the main control board learns the top floor position data through the floor position sensor interface;

S13, after the learning of the top-level position data data is completed, perform the down-call operation with the target floor being the bottommost floor through the call switch interface, and monitor the feedback signal of the call button, and continue to call if the feedback signal is not detected;

S14, the elevator runs to the lowest floor, and after reaching the lowest floor, the main control board learns the floor position data through the floor position sensor interface;

S15, after the learning of the top-level position data is completed, the automatic learning mode is exited.

Also, the following conditions are set in the automatic learning mode:

1) It takes 5 minutes to wait for the upward call operation, so that the maintenance personnel can evacuate the top of the car to ensure safety; if the feedback signal is received within 5 minutes, the elevator will start to run upward after 5 minutes;

2) The downward call operation is carried out immediately after the learning of the top-level position data data is completed, and the elevator is started to run downward after receiving the feedback signal;

3) The feedback signal is required to be a continuous signal, that is, a feedback signal is made when responding to the call, and the feedback signal is turned off until the target floor of the call is reached; only when this complete continuous signal is received, the elevator is considered to have run to the target floor;

4) If the feedback signal is not received after waiting for three preset call response times (for example, 3 seconds) during the elevator call, the learning mode is exited.

The above preferred embodiments should be regarded as examples of the embodiments of the present application, and all technical deductions, replacements, improvements, etc. that are similar to, similar to, or based on the present application should be regarded as the protection scope of this patent.

Claims (10)

1. The elevator hydraulic safety gear controller is characterized by comprising a main control board and a display;

the display is provided with a display and setting interface and is provided with or connected with a plurality of keys;

the main control board is provided with a floor position sensor interface, an electromagnetic valve switch interface, a pressure sensor interface, a pressurized oil pump interface, a safety relay interface and a signal detection switch interface;

the floor position sensor interface is used for being butted with a floor position sensor of an elevator, and comprises a UCMP pin, a CH pin and a CL pin which are used for CAN communication;

the solenoid valve switch interface comprises a plurality of groups of solenoid valves, wherein at least one group of solenoid valves is associated with the UCMP pin and is effective when the UCMP pin is at a high level;

the pressure sensor interface is used for butting a pressure sensor and continuously detecting the pressure state of the system;

the pressurized oil pump interface is used for butting and driving the pressurized oil pump, and the signal frequency and the duty ratio can be set;

the safety relay interface is used for connecting and controlling the on-off of a safety relay of the elevator;

the master control board is configured to:

starting a pressurizing oil pump through the pressurizing oil pump interface to pressurize until the system pressure reaches a preset target pressure value, and then closing the pressurizing oil pump and continuously detecting the pressure state; if the system pressure is reduced to be lower than the preset pressurization lower limit value, restarting the pressurization oil pump for pressurization until the target pressure value is reached; so circulate to maintain system pressure.

2. The elevator hydraulic safety gear controller according to claim 1, characterized in that the main control board is provided with a call switch interface, the call switch interface comprises a TB pin connected with an upward call button, a BB pin connected with a downward call button, a TOP pin receiving an upward feedback signal, and a BM pin receiving a downward feedback signal.

3. The elevator hydraulic safety gear controller according to claim 1, wherein the control board is provided with a counting switch interface including a counting relay for outputting a counted number.

4. The elevator hydraulic safety gear controller according to claim 1, wherein the main control board is provided with a remote self-checking switch input interface and a remote self-checking switch output interface.

5. The elevator hydraulic safety gear controller according to claim 1, wherein the main control board is connected to a switching power supply, the switching power supply has a mains supply interface and a storage battery interface, and the switching power supply is supplied by mains supply by default and is switched to the storage battery when the mains supply is disconnected.

6. The controller of hydraulic safety tongs for elevator according to claim 5, wherein the main control board, the switching power supply and the storage battery are disposed in a box body having a flip cover, the box body is provided with a wire hole for a cable to pass through, the flip cover is provided with a ring groove adapted to the opening of the box body, and a sealing rubber ring is disposed in the ring groove.

7. The elevator hydraulic safety gear control method is characterized by being applied to the elevator hydraulic safety gear controller in claim 1; firstly, a target pressure value and a pressurization lower limit value are set, and then the following steps are executed:

s1, starting the pressurizing oil pump to pressurize until the system pressure reaches the target pressure value;

s2, when the system pressure reaches the target pressure value, the pressure pump is closed, and the pressure state is continuously detected;

s3, when the system pressure is reduced to be lower than the pressurization lower limit value, the pressurization pump is restarted to pressurize until the target pressure value is reached;

steps S2-S3 are executed cyclically, maintaining the system pressure.

8. The elevator hydraulic safety gear control method according to claim 7, wherein the signal detection switch interface is connected to a travel switch provided in a mechanical travel of a pressurized oil pump;

setting a safe pressure value;

in step S1, as the system pressure rises, when the travel switch is triggered and the main control board detects that the current system pressure reaches the safety pressure value, the safety relay interface is triggered to close the safety relay of the elevator.

9. The control method of the hydraulic safety gear of the elevator according to claim 7, characterized in that the main control board is provided with a call switch interface, and the call switch interface comprises a TB pin connected with an upward call button, a BB pin connected with a downward call button, a TOP pin for receiving an upward feedback signal, and a BM pin for receiving a downward feedback signal;

the main control board is provided with an automatic learning mode, the automatic learning mode is used for being executed when the controller is used for the first time, and the automatic learning mode comprises the following steps:

s11, calling an upward call with the target floor being the topmost floor through the call switch interface, monitoring a feedback signal of a call button, and continuing calling the call if the feedback signal is not monitored;

s12, the elevator runs to the topmost floor, and the main control board learns the top floor position data through the floor position sensor interface after reaching the topmost floor;

s13, after the top position data learning is finished, the downward calling operation that the target floor is the bottom floor is carried out through the calling switch interface, the feedback signal of the calling button is monitored, and the calling is continued if the feedback signal is not monitored;

s14, the elevator runs to the bottommost floor, and the main control board learns the bottom position data through the floor position sensor interface after reaching the bottommost floor;

and S15, exiting the automatic learning mode after the top position data is learned.

10. The elevator hydraulic safety gear control method according to claim 9, characterized in that the following conditions are set in the automatic learning mode:

1) waiting for T time is needed for the upward calling operation, and if a feedback signal is received within the T time, starting the elevator to run upwards after the T time is over;

2) the downward calling operation is carried out immediately after the top position data is learned, and the elevator is started to run downwards after receiving a feedback signal;

3) the feedback signal is required to be a continuous signal, namely, the feedback signal is made when the call is responded, and the feedback signal is not closed until the target floor of the call is reached;

4) and if the feedback signal is not received after waiting for a plurality of times of preset call response time in the call calling process, exiting the learning mode.

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