CN212374646U - Elevator safety loop system - Google Patents
Elevator safety loop system Download PDFInfo
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- CN212374646U CN212374646U CN202020441999.4U CN202020441999U CN212374646U CN 212374646 U CN212374646 U CN 212374646U CN 202020441999 U CN202020441999 U CN 202020441999U CN 212374646 U CN212374646 U CN 212374646U
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Abstract
The utility model provides an elevator safety loop system, which comprises an elevator main control board, a machine room electronic safety board and a plurality of first safety devices; the elevator main control board comprises a first logic processing unit, a double-port random access memory and a plurality of first terminals, wherein the double-port random access memory comprises a first pin group and a second pin group, the first logic processing unit is connected with the first pin group, and the first terminals are connected with the second pin group; the computer room electronic safety board comprises a second logic processing unit, a plurality of second terminals and a plurality of third terminals, wherein the second terminals are respectively connected with the first terminals through signal cables, each third terminal is connected with one first safety device, and the second logic processing unit writes the state of the first safety device into the dual-port random access memory through the second terminals, the signal cables and the first terminals. The embodiment of the utility model provides a can improve safety device state data interaction efficiency.
Description
Technical Field
The embodiment of the utility model provides a relate to elevator control field, more specifically say, relate to an elevator safety circuit system.
Background
With the development of cities, high-rise buildings rise frequently, and the use of elevators is more and more popular. The elevator is a device which vertically moves among different floors in a shaft, a car door is arranged on an elevator car, a shaft door is correspondingly arranged on the wall of the shaft and leads to each floor, and passengers can get in and out of the car by opening the car door and the shaft door.
In order to ensure that the elevator can run safely, a plurality of electrical safety devices are arranged on the elevator, and the elevator can run only when each electrical safety device is normal. As shown in fig. 1, each electrical safety device corresponds to one safety device (when the electrical safety device is normal, the corresponding safety device is closed, otherwise, the safety device is open), and all the safety devices K01, K02, … and K0n are connected in series to form a safety loop, in which a running contactor coil S1 and a band-type brake contactor coil S2 are further provided. When any safety device K01-K0n in the safety loop is disconnected, so that the elevator is braked, and the safety shutdown of the elevator is realized.
Safety devices in the safety chain are distributed at various positions of the elevator, and some safety devices are in a machine room, such as a main machine emergency stop switch, a hall door lock, a speed limiter switch and the like; some of the devices are arranged in a lift car, such as a lift car door lock, a lift car top emergency stop switch and the like; some in the hoistway, pit, etc. Therefore, the safety circuit needs to be bridged back and forth, which increases the cost of the cable, and in order to reduce the voltage loss on the safety circuit, a higher voltage circuit needs to be used, which is correspondingly higher in cost.
In addition, when the elevator is maintained and checked, the fault position of the elevator safety loop is not easy to detect and position, and the troubleshooting efficiency is low.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a need concatenate each safety device to above-mentioned elevator safety circuit, lead to the cable kind many, connect complicated, the higher problem of cost, provide an elevator safety circuit system.
The embodiment of the utility model provides a technical scheme who solves above-mentioned technical problem is, provides an elevator safety loop system, including elevator main control board, computer lab electron safety board, two port random access memory and a plurality of first safety device;
the elevator main control board is connected with the machine room electronic safety board through a communication bus, the elevator main control board comprises a first logic processing unit, the machine room electronic safety board comprises a second logic processing unit, and the double-port random access memory is respectively connected with the first logic processing unit and the second logic processing unit;
the second logic processing unit is connected with the plurality of first safety devices, is used for acquiring the state information of each first safety device, and sends the state information to the double-port random access memory;
the double-port random access memory is used for storing the state information of the first safety device in real time;
and the first logic processing unit is used for acquiring the state information of the first safety device from the double-port random access memory and controlling the elevator to run according to the state information of the first safety device.
Preferably, the dual port random access memory is located on the elevator main control board, and the elevator main control board further includes a plurality of first terminals, the dual port random access memory includes a first pin group and a second pin group, and the first logic processing unit is connected to the first pin group and reads data in the dual port random access memory through the first pin group, and the plurality of first terminals are connected to the second pin group;
the computer room electronic safety board comprises a second logic processing unit, a plurality of second terminals and a plurality of third terminals, wherein the plurality of second terminals are respectively connected with the plurality of first terminals through signal cables, each third terminal is connected with a first safety device, the second logic processing unit is respectively connected with each second terminal and each third terminal, and the states of the first safety devices connected with the third terminals are written into the dual-port random access memory through the second terminals, the signal cables and the first terminals.
Preferably, the computer room electronic safety board comprises a first communication unit connected with the second logic processing unit;
the elevator safety loop system comprises a car top electronic safety plate and a plurality of second safety devices, wherein the car top electronic safety plate comprises a third logic processing unit, a second communication unit and a plurality of fourth terminals, and the second communication unit is in communication connection with the first communication unit through a serial communication line; each fourth terminal is connected with a second safety device, the third logic processing unit is respectively connected with the second communication unit and each fourth terminal, and a first state signal containing the state of the second safety device connected with the fourth terminal is sent to the second logic processing unit through the second communication unit, the serial communication line and the first communication unit; the second logic processing unit also writes the state of a second safety device connected with a fourth terminal into the dual-port random access memory through the second terminal, the signal cable and the first terminal.
Preferably, the elevator safety loop system comprises an elevator brake control device, the machine room electronic safety board comprises a switch assembly connected in series in a power supply loop of the elevator brake control device, a control end of the switch assembly is connected with the second logic processing unit, and the second logic processing unit controls the switch assembly to be disconnected when the state of any first safety device connected with the third terminal or the state of any second safety device connected with the fourth terminal is abnormal.
Preferably, the machine room electronic safety board comprises a fourth logic processing unit and a third communication unit connected with the fourth logic processing unit; the car top electronic safety plate comprises a fifth logic processing unit and a fourth communication unit connected with the fifth logic processing unit, and the fourth communication unit is in communication connection with the third communication unit through the serial communication line;
the fifth logic processing unit is connected to each fourth terminal, and sends a second status signal including a status of a second safety device connected to the fourth terminal to the fourth logic processing unit through the fourth communication unit, the serial communication line, and the third communication unit;
the fourth logic processing unit is connected with each third terminal, and controls the switch assembly to be disconnected when the state of any first safety device connected with the third terminal or the state of any second safety device connected with the fourth terminal is abnormal.
Preferably, the switching assembly comprises a first safety relay and a second safety relay connected in series;
the control end of the first safety relay is connected with the second logic processing unit, and the second logic processing unit controls the first safety relay to be disconnected when the state of any first safety device connected with the third terminal or the state of any second safety device connected with the fourth terminal is abnormal;
the control end of the second safety relay is connected with the fourth logic processing unit; and the fourth logic processing unit controls the second safety relay to be disconnected when the state of any first safety device connected with the third terminal or the state of any second safety device connected with the fourth terminal is abnormal.
Preferably, the elevator main control board comprises a band-type brake relay and an operation relay, the elevator brake control device comprises an operation contactor and a band-type brake contactor, the band-type brake relay is connected between the switch assembly and a coil of the band-type brake contactor in series, and the operation relay is connected between the switch assembly and the coil of the operation contactor in series;
and the first logic processing unit is respectively connected with the control ends of the band-type brake relay and the operation relay.
Preferably, the plurality of first security devices comprises one or more of: the emergency stop switch of the control cabinet, the emergency stop switch of the host computer, the hand wheel switch of the barring, the emergency stop switch of the switch box of the pit, the emergency stop switch of the overhaul box of the pit, the rope break switch of the tension pulley, the buffer switch of the cage, the buffer switch of the counterweight, the lower limit switch, the upper limit switch, the speed limiter switch, and the clamping rope switch.
Preferably, the plurality of second security devices comprises one or more of: the safety gear switch, the car roof maintenance switch, the car roof ascending switch, the car roof descending switch, the car roof running switch and the car door lock switch.
Implement the utility model discloses elevator safety circuit system has following beneficial effect: the state of the safety device is obtained through the machine room electronic safety board, and the state of the safety device is written into the double-port random access memory of the elevator main control board, the elevator main control board can obtain the state of the safety device in real time by reading the double-port random access memory, and the interaction efficiency of the state data of the safety device is improved. And, the embodiment of the utility model provides a still break off elevator safety circuit through computer lab electron safety plate when arbitrary safety device is unusual, the system stops the elevator, has avoided elevator safety circuit at the direct cross-over connection of each safety device, has saved cable cost and circuit cost.
Drawings
Fig. 1 is a schematic view of a prior art elevator safety circuit;
fig. 2 is a schematic diagram of an elevator safety circuit system provided by an embodiment of the present invention;
fig. 3 is a schematic diagram of an elevator safety circuit system according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 2, it is the embodiment of the utility model provides an elevator safety loop system, this elevator safety loop system can realize elevator safety control to can make elevator main control system acquire the state of each safety device fast. The elevator safety loop system of the embodiment comprises an elevator main control board 11, a machine room electronic safety board 12 and a plurality of first safety devices. The elevator main control board 11 and the machine room electronic safety board 12 can be respectively installed in an elevator control cabinet of a machine room, and the elevator main control board 11 is in signal connection with the machine room electronic safety board 12.
The elevator main control board 11 may be connected to a frequency converter, etc., and controls the operation of the elevator according to an externally input call signal, a feedback signal of each sensor or related components, etc. Specifically, the elevator main control board 11 includes a first logic processing unit 111, a dual port random access memory 112, and a plurality of first terminals 113. The first logic processing Unit 111 may be a Micro Controller Unit (MCU), a Programmable Logic Controller (PLC), etc., the dual Random Access Memory 112 is a Random Access Memory (RAM) having two ports, the dual Random Access Memory 112 includes a first pin group (the first pin group includes a plurality of first pins) and a second pin group (the second pin group includes a plurality of second pins), the first logic processing Unit 111 is connected to the first pin group of the dual Random Access Memory 112, and the plurality of first terminals 113 is connected to the second pin group of the dual Random Access Memory 112, so that the first logic processing Unit 111 can read data stored in the dual Random Access Memory 112 through the first pin group, and the dual Random Access Memory 112 can also store data written in the plurality of first terminals 113.
Certainly, in practical applications, the dual-port ram 112 may not be located on the elevator main control board 11, but the first logic processing unit 111 may need to wait for communication data, and cannot obtain corresponding data in a timely and batch manner.
The machine room electronic Safety board 12 is based on PESSRAL (Programmable Electric Systems in Safety Related Applications for Lifts), that is, the machine room electronic Safety board 12 meets the requirements of PESSRAL. The machine room electronic security board 12 includes a second logic processing unit 121, a plurality of second terminals 122, and a plurality of third terminals 123. The second logic processing unit 121 may also adopt a micro control unit, a programmable logic controller, etc., the second terminals 122 are respectively connected to the first terminals 113 through signal cables, each third terminal 123 is connected to a first safety device (for example, each first safety device is connected in series between the low voltage dc power supply and a third terminal 123), and the second logic processing unit 121 is respectively connected to each second terminal 122 and each third terminal 123, so that the second logic processing unit 121 can obtain the state of each first safety device connected to the third terminal 123 in real time, and write the state of each first safety device into the dual port random access memory 112 through the second terminal 122, the signal cables and the first terminals 113.
Specifically, to facilitate connection, the plurality of first terminals 113 may be connected to one plug at the elevator main control board 11, and similarly, the plurality of second terminals 122 may be connected to one plug at the machine room electronic safety board 12, so that connection of the plurality of first terminals 113 and the plurality of second terminals 122 may be simultaneously achieved by the flat cables respectively connected to the two plugs. For example, the plurality of first terminals 113 and the plurality of second terminals 122 may be connected by an SPI (Serial Peripheral Interface) bus.
Through the structure, the machine room electronic safety board 12 can acquire the states of a plurality of first safety devices in real time, and write the state of each first safety device into the dual-port random access memory 112 of the elevator main control board 11, so that the first logic processing unit 111 of the elevator main control board 11 can quickly acquire the state of each first safety device by reading the data of the dual-port random access memory 112, and the interaction efficiency of the state data of the first safety devices is greatly improved.
In particular, the aforementioned plurality of first security devices comprises one or more of: the emergency stop switch of the control cabinet, the emergency stop switch of the host computer, the hand wheel switch of the barring, the emergency stop switch of the switch box of the pit, the emergency stop switch of the overhaul box of the pit, the rope break switch of the tension pulley, the buffer switch of the cage, the buffer switch of the counterweight, the lower limit switch, the upper limit switch, the speed limiter switch, the clamping rope switch, etc.
As shown in fig. 3, another embodiment of the present invention provides an elevator safety loop system, which comprises an elevator main control board 11, a machine room electronic safety board 12, a plurality of first safety devices, a car top electronic safety board 13, and a plurality of second safety devices. The car top electronic safety plate 13 is also based on PESSRAL, i.e. the car top electronic safety plate 13 meets the requirements of PESSRAL.
The machine room electronic safety board 12 in this embodiment further includes a first communication unit connected to the second logic processing unit 121. The car top electronic safety board 13 comprises a third logic processing unit 131, a second communication unit and a plurality of fourth terminals 132, and the second communication unit is in communication connection with the first communication unit of the machine room electronic safety board 12 through a serial communication line. Specifically, the first communication unit and the second communication unit may respectively include a CAN (Controller Area Network) communication module, that is, the car top electronic safety board 13 and the machine room electronic safety board 12 communicate with each other through a CAN bus.
In the car top electronic safety board 13, each fourth terminal 132 is connected to a second safety device (for example, each second safety device is connected in series between the low voltage dc power supply and one fourth terminal 132), and the third logic processing unit 131 is connected to the second communication unit and each fourth terminal 132, so that the third logic processing unit 131 can obtain the state of each second safety device connected to the fourth terminal 132 in real time, and send the first state signal including the state of the second safety device to the second logic processing unit 121 through the second communication unit, the serial communication line, and the first communication unit. Specifically, the third logic processing unit 131 may send the first state signal to the second logic processing unit 121 according to a preset period.
Accordingly, after receiving the first state signal, the second logic processing unit 121 obtains the state of each second safety device connected to the fourth terminal 132 by analyzing the first state signal, and writes the state of each second safety device connected to the fourth terminal 132 into the dual port random access memory 112 through the second terminal 122, the signal cable, and the first terminal 113), so that the first logic processing unit 111 of the elevator main control board 11 can obtain the state of each second safety device by reading data in the dual port random access memory 112.
In particular, the plurality of second security devices comprises one or more of: a safety gear switch, a car top maintenance switch, a car top ascending switch, a car top descending switch, a car top running switch, a car door lock switch and the like.
In another embodiment of the present invention, the above elevator safety loop system further includes an elevator braking control device and a switch module, wherein the switch module is connected in series with the power supply loop of the elevator braking control device, and the control end of the switch module is connected to the second logic processing unit 121, the second logic processing unit 121 controls the switch module to be disconnected when the state of any first safety device connected to the third terminal 123 or the state of any second safety device connected to the fourth terminal 132 is abnormal, so as to power down the elevator braking control device and stop the operation of the elevator. In particular, the switch assembly described above may be integrated into the room electronic safety board 12 and may include relays, semiconductor switchgears, and the like. The elevator brake control device specifically comprises a coil of the operation contactor K5 and a coil of the brake contactor K6, the coil of the operation contactor K5 and the coil of the brake contactor K6 are connected in parallel, and then are connected in series with the switch assembly between a live wire and a zero line of an alternating current power supply, so that when the switch assembly is disconnected, the coil of the operation contactor K5 and the coil of the brake contactor K6 are powered off, the brake device is braked, the frequency converter is powered off, and the elevator stops running.
In another embodiment of the present invention, to improve the reliability of the system, a secure serial bus communication can be used between the car top electronic safety board 13 and the machine room electronic safety board 12.
Specifically, the machine room electronic safety board 12 includes, in addition to the second logic processing unit 121 and the first communication unit, a fourth logic processing unit and a third communication unit connected to the fourth logic processing unit; correspondingly, the car top electronic safety plate 13 comprises a fifth logic processing unit and a fourth communication unit connected with the fifth logic processing unit in addition to the third logic processing unit 131 and the second communication unit; and the fourth communication unit is communicatively connected to the third communication unit via a serial communication line between the first communication unit and the second communication unit.
In the car top electronic safety board 13, the fifth logic processing unit is connected to each fourth terminal 132, and sends a second state signal including a state of a second safety device connected to the fourth terminal 132 to the fourth logic processing unit through the fourth communication unit, the serial communication line, and the third communication unit; the fourth logic processing unit obtains the state of each second safety device connected to the fourth terminal 132 by analyzing the second state signal.
In the electronic safety board 12 of the computer room, a fourth logic processing unit is connected to each third terminal 123, and the fourth logic processing unit controls the switch assembly to be turned off when the state of any first safety device connected to the third terminal 123 or the state of any second safety device connected to the fourth terminal 132 (obtained by analyzing the second state signal) is abnormal.
Through two communication links, the reliability of communication between the car roof electronic safety board 13 and the machine room electronic safety board 12 can be ensured, and the safety of the system is improved.
Accordingly, the switch assembly in the elevator safety circuit system includes the first safety relay K1 and the second safety relay K2, and the first safety relay K1 and the second safety relay K2 are connected in series. The control end of the first safety relay K1 is connected to the second logic processing unit 121, and the second logic processing unit 121 controls the first safety relay K1 to open when the state of any first safety device connected to the third terminal 123 or the state of any second safety device connected to the fourth terminal 132 is abnormal; the control terminal of the second safety relay K2 is connected to the fourth logic processing unit, and the fourth logic processing unit controls the second safety relay K2 to open when the state of any first safety device connected to the third terminal 123 or the state of any second safety device connected to the fourth terminal 132 is abnormal.
In addition, the elevator main control board 11 may further include a brake relay K4 and an operation relay K3, the brake relay K4 is connected in series between the switch module and the coil of the brake contactor K6, the operation relay K3 is connected in series between the switch module and the coil of the operation contactor K5, and the first logic processing unit 111 is connected with the control ends of the brake relay K4 and the operation relay K3, so as to implement elevator operation or brake control.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. An elevator safety loop system is characterized by comprising an elevator main control board, a machine room electronic safety board, a double-port random access memory and a plurality of first safety devices;
the elevator main control board is connected with the machine room electronic safety board through a communication bus, the elevator main control board comprises a first logic processing unit, the machine room electronic safety board comprises a second logic processing unit, and the double-port random access memory is respectively connected with the first logic processing unit and the second logic processing unit;
the second logic processing unit is connected with the plurality of first safety devices, is used for acquiring the state information of each first safety device, and sends the state information to the double-port random access memory;
the double-port random access memory is used for storing the state information of the first safety device in real time;
and the first logic processing unit is used for acquiring the state information of the first safety device from the double-port random access memory and controlling the elevator to run according to the state information of the first safety device.
2. The elevator safety loop system according to claim 1, wherein the dual port random access memory is located in the elevator main control board, and the elevator main control board further comprises a plurality of first terminals, the dual port random access memory comprises a first pin group and a second pin group, and the first logic processing unit is connected with the first pin group and reads data in the dual port random access memory through the first pin group, and the plurality of first terminals are connected with the second pin group;
the computer room electronic safety board comprises a plurality of second terminals and a plurality of third terminals, wherein the second terminals are respectively connected with the first terminals through signal cables, each third terminal is connected with one first safety device, the second logic processing unit is respectively connected with each second terminal and each third terminal, and the states of the first safety devices connected with the third terminals are written into the dual-port random access memory through the second terminals, the signal cables and the first terminals.
3. The elevator safety loop system according to claim 2, wherein the machine room electronic safety board comprises a first communication unit connected with the second logic processing unit;
the elevator safety loop system comprises a car top electronic safety plate and a plurality of second safety devices, wherein the car top electronic safety plate comprises a third logic processing unit, a second communication unit and a plurality of fourth terminals, and the second communication unit is in communication connection with the first communication unit through a serial communication line; each fourth terminal is connected with a second safety device, the third logic processing unit is respectively connected with the second communication unit and each fourth terminal, and a first state signal containing the state of the second safety device connected with the fourth terminal is sent to the second logic processing unit through the second communication unit, the serial communication line and the first communication unit; the second logic processing unit also writes the state of a second safety device connected with a fourth terminal into the dual-port random access memory through the second terminal, the signal cable and the first terminal.
4. The elevator safety loop system according to claim 3, characterized in that the elevator safety loop system comprises an elevator brake control device, the machine room electric safety board comprises a switch assembly connected in series in a power supply loop of the elevator brake control device, and a control terminal of the switch assembly is connected with the second logic processing unit, the second logic processing unit controls the switch assembly to be disconnected when a state of any first safety device connected with a third terminal or a state of any second safety device connected with a fourth terminal is abnormal.
5. The elevator safety loop system according to claim 4, wherein the machine room electronic safety board comprises a fourth logic processing unit and a third communication unit connected to the fourth logic processing unit; the car top electronic safety plate comprises a fifth logic processing unit and a fourth communication unit connected with the fifth logic processing unit, and the fourth communication unit is in communication connection with the third communication unit through the serial communication line;
the fifth logic processing unit is connected to each fourth terminal, and sends a second status signal including a status of a second safety device connected to the fourth terminal to the fourth logic processing unit through the fourth communication unit, the serial communication line, and the third communication unit;
the fourth logic processing unit is connected with each third terminal, and controls the switch assembly to be disconnected when the state of any first safety device connected with the third terminal or the state of any second safety device connected with the fourth terminal is abnormal.
6. The elevator safety loop system according to claim 5, wherein the switch assembly includes a first safety relay and a second safety relay connected in series;
the control end of the first safety relay is connected with the second logic processing unit, and the second logic processing unit controls the first safety relay to be disconnected when the state of any first safety device connected with the third terminal or the state of any second safety device connected with the fourth terminal is abnormal;
the control end of the second safety relay is connected with the fourth logic processing unit; and the fourth logic processing unit controls the second safety relay to be disconnected when the state of any first safety device connected with the third terminal or the state of any second safety device connected with the fourth terminal is abnormal.
7. The elevator safety loop system according to claim 4, wherein the elevator main control board comprises a brake relay and a running relay, the elevator brake control device comprises a running contactor and a brake contactor, the brake relay is connected in series between the switch assembly and a coil of the brake contactor, and the running relay is connected in series between the switch assembly and a coil of the running contactor;
and the first logic processing unit is respectively connected with the control ends of the band-type brake relay and the operation relay.
8. The elevator safety loop system according to claim 3, wherein the plurality of first safety devices comprise one or more of: the emergency stop switch of the control cabinet, the emergency stop switch of the host computer, the hand wheel switch of the barring, the emergency stop switch of the switch box of the pit, the emergency stop switch of the overhaul box of the pit, the rope break switch of the tension pulley, the buffer switch of the cage, the buffer switch of the counterweight, the lower limit switch, the upper limit switch, the speed limiter switch, and the clamping rope switch.
9. The elevator safety loop system according to claim 8, wherein the plurality of second safety devices comprise one or more of: the safety gear switch, the car roof maintenance switch, the car roof ascending switch, the car roof descending switch, the car roof running switch and the car door lock switch.
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| CN202020441999.4U CN212374646U (en) | 2020-03-31 | 2020-03-31 | Elevator safety loop system |
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| CN202020441999.4U CN212374646U (en) | 2020-03-31 | 2020-03-31 | Elevator safety loop system |
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| CN112978524A (en) * | 2021-03-02 | 2021-06-18 | 北京索德电气工业有限公司 | Elevator function safety control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112978524A (en) * | 2021-03-02 | 2021-06-18 | 北京索德电气工业有限公司 | Elevator function safety control system |
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