Power supply system of electronic safety tongs

Abstract

The utility model relates to the technical field of elevators, in particular to an electronic safety tongs power supply system which comprises a first power supply module, a first detection module, a first control module, a second power supply module and a second control module. The control end of the first power supply module is connected with the first control module, the first detection module is connected with the first power supply module, the control end of the second power supply module is connected with the second control module, and the first control module is in communication connection with the second control module. According to the utility model, the working state of the power supply of the electronic safety tongs can be detected in real time, and a double-path redundancy design is adopted, so that even if one path fails, the other path can be immediately started, and the problems that the power of the electronic safety tongs loses power and people are accidentally shut down in an elevator after the reliability of the power supply of the electronic safety tongs fails are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to an electronic safety clamp power supply system. Background Art

[0002] With the development of technology, the technology of elevator overspeed protection is constantly innovating, and various new technologies have emerged; the traditional elevator overspeed protection generally adopts the protection method of speed limiter plus mechanical safety clamp. When the elevator overspeeds, the speed limiter triggers the linkage mechanism to drive the safety clamp for overspeed protection.

[0003] In recent years, electronic safety clamps have been developed, which generally adopt the protection method of position sensor plus electronic safety clamp. When the elevator is overspeeding, the position sensor sends an overspeed signal, which makes the electronic safety clamp clamp the guide rail for braking to achieve overspeed protection. However, the above two solutions have some application disadvantages: the mechanical safety clamp needs to be used with the speed limiter, and the wire rope needs to be added. The product needs to occupy a larger space in the building, and the components are more expensive.

[0004] The electronic safety clamp is used with the position sensor, with compact installation space, few components and low cost. However, the reliability of the safety clamp power supply equipped with the electronic safety clamp requires extremely high requirements. If the safety clamp power supply fails, the electronic safety clamp will lose power and clamp the guide rail, resulting in a person being trapped. Therefore, the field urgently needs an electronic safety clamp power supply that is simple and convenient to install and debug, reliable in operation, and reduces the probability of failure to ensure the safety of passengers. Summary of the invention

[0005] In view of the deficiencies in the prior art, the utility model provides an electronic safety clamp power supply system with a built-in redundant system and redundant control, which can detect the operating status of the power supply in real time and make the electronic safety clamp work more reliably.

[0006] The technical solution of the utility model is as follows: an electronic safety clamp power supply system, comprising:

[0007] A first power supply module, a first detection module, a first control module, a second power supply module, and a second control module;

[0008] The control end of the first power supply module is connected to the first control module, the first detection module is connected to the first power supply module, the control end of the second power supply module is connected to the second control module, and the first control module is in communication connection with the second control module;

[0009] The first power supply module and the second power supply module are used to generate a control voltage for the electronic safety clamp actuator to operate, and the first detection module is used to detect the control voltage output by the first power supply module and generate a detection signal;

[0010] When the first control module detects that the detection signal is abnormal, it controls the first power supply module to be turned off and generates a redundant control signal, and the second control module controls the second power supply module to be turned on according to the redundant control signal.

[0011] Further, the first power supply module includes: a first power module and a first output module, the control end of the first power module is connected to the first control module, the output end of the first power module is connected to the input end of the first output module, the control end of the first output module is connected to the first control module, the two input ends of the first detection module are respectively connected to the input end and the output end of the first output module, and the output end of the first detection module is connected to the first control module;

[0012] The first power supply module is used to generate an excitation voltage and a maintenance voltage for the electronic safety clamp actuator to operate;

[0013] The first output module is used to switch and output between the excitation voltage and the maintenance voltage of the first power supply module;

[0014] The first detection module is used to collect the output voltage of the first output module and the output voltage of the first power supply module.

[0015] Furthermore, the first power supply module includes a voltage conversion circuit, an enable control circuit and a self-test circuit, the input end of the voltage conversion circuit is connected to the input voltage, the enable control circuit is connected to the voltage conversion circuit, the self-test circuit is connected to the voltage conversion circuit, the enable control circuit and the self-test circuit are both connected to the first control module, the enable control circuit is used to control the opening and closing of the voltage conversion circuit according to the signal of the first control module, and the self-test circuit is used to perform self-test on the voltage conversion circuit.

[0016] Furthermore, the first output module includes a switch component and a switch component driving circuit, the input end of the switch component driving circuit is connected to the first control module, the output end of the switch component driving circuit is connected to the control end of the switch component, the normally open contact and the normally closed contact of the switch component are respectively connected to the excitation voltage and the maintenance voltage, and the switch component driving circuit is used to drive the switch component to perform a switch switching action according to the signal of the first control module.

[0017] Further, the second power supply module includes: a second power supply module and a second output module;

[0018] The control end of the second power module is connected to the second control module, the output end of the second power module is connected to the input end of the second output module, and the control end of the second output module is connected to the second control module;

[0019] The second power supply module is used to generate an excitation voltage and a maintenance voltage for the electronic safety clamp actuator to operate;

[0020] The second output module is used to switch and output between the excitation voltage and the maintenance voltage of the second power supply module.

[0021] Furthermore, it also includes a second detection module, wherein two input ends of the second detection module are respectively connected to the input end and the output end of the second output module, and the output end of the second detection module is connected to the second control module;

[0022] The second detection module is used to collect the output voltage of the second output module and the output voltage of the second power supply module.

[0023] Furthermore, both the first control module and the second control module are connected to an alarm module.

[0024] Furthermore, the first power supply module and the second power supply module have the same structure.

[0025] The beneficial effects of the utility model are as follows: the utility model can detect the working status of the electronic safety clamp power supply in real time, and adopts a dual-path redundant design. Even if one path fails, the other path can be immediately enabled, which solves the problem that the electronic safety clamp loses power and operates due to power reliability failure, and the elevator accidentally closes people. At the same time, the alarm module will prompt the power supply system to fail, so that the staff can discover and replace it in time, reducing the potential safety hazards in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model.

[0027] Figure 2 It is a schematic diagram of the power module and the output module in the utility model. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. The described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] In the technical solution of the utility model, Figure 1 This is a structural block diagram provided according to the specific structure of an electronic safety clamp power supply system of the utility model, such as Figure 1As shown, the utility model includes: a first power supply module, a first detection module 3, a first control module 4 and a second power supply module, a second control module 8.

[0030] The control end of the first power supply module is connected to the first control module 4 , the first detection module 3 is connected to the first power supply module, the control end of the second power supply module is connected to the second control module 8 , and the first control module 4 is in communication connection with the second control module 8 .

[0031] The first power supply module and the second power supply module are used to generate a control voltage for the electronic safety clamp actuator to operate, and the first detection module 3 is used to detect the control voltage output by the first power supply module and generate a detection signal.

[0032] When the first control module detects that the detection signal is abnormal, it controls the first power supply module to shut down and generates a redundant control signal, and the second control module controls the second power supply module to start according to the redundant control signal. The first control module 4 and the second control module 8 can be implemented as a single chip microcomputer, MCU, etc.

[0033] In one embodiment of the utility model, the first power supply module includes: a first power module 1 and a first output module 2, the control end of the first power module 1 is connected to the first control module 4, the output end of the first power module 1 is connected to the input end of the first output module 2, the control end of the first output module 2 is connected to the first control module 4, the two input ends of the first detection module 3 are respectively connected to the input end and the output end of the first output module 2, and the output end of the first detection module 3 is connected to the first control module 4.

[0034] The first power supply module 1 is used to generate an excitation voltage and a maintenance voltage for the electronic safety clamp actuator to operate. The first output module 2 is used to switch the output between the excitation voltage and the maintenance voltage of the first power supply module 1. The first detection module 3 is used to collect the output voltage of the first output module 2 and the output voltage of the first power supply module 1.

[0035] The output end of the first output module 2 is connected to the electronic safety clamp actuator. The first detection module 3 sends the collected output voltage of the first output module 2 and the output voltage of the first power module 1 to the first control module 4. When the output voltage of the first output module 2 is inconsistent with the output voltage of the first power module 1, the first control module 4 determines that the first output module is faulty. At this time, the first control module 4 shuts down the first power module and generates a redundant control signal.

[0036] The first power supply module 1 includes a voltage conversion circuit 11, an enable control circuit 12 and a self-test circuit 13. The input end of the voltage conversion circuit 11 is connected to the input voltage, the enable control circuit 12 is connected to the voltage conversion circuit 11, and the self-test circuit is connected to the voltage conversion circuit 11. The enable control circuit 12 and the self-test circuit 13 are both connected to the first control module 4. The enable control circuit 12 is used to control the opening and closing of the voltage conversion circuit 11 according to the signal of the first control module 4, and the self-test circuit 13 is used to perform self-test on the voltage conversion circuit 11.

[0037] Among them, the power conversion circuit is generally a Buck or Boost circuit to achieve the function of boosting and bucking. The enable control circuit is used to control the working state of the power conversion circuit, and the self-test circuit is used to detect the working state of the power conversion circuit. The above circuits are all conventional circuits and will not be described here.

[0038] When the first power supply module is working, it will output two voltages, namely the excitation voltage and the maintenance voltage. The excitation voltage is relatively high, generally 36V and 48V, and is used to generate an initial large traction force for the electronic safety clamp to excite the electronic safety clamp actuator from a released state to an open state. The maintenance voltage is relatively low, generally 9V, and is used to generate a maintenance force for the electronic safety clamp to prevent the electronic safety clamp actuator from being released and to keep it in an open state, which can make the electronic safety clamp have lower power consumption.

[0039] The first output module 2 includes a switch component 21 and a switch component drive circuit 22, the input end of the switch component drive circuit 22 is connected to the first control module 8, the output end of the switch component drive circuit 22 is connected to the control end of the switch component 21, the normally open contact and the normally closed contact of the switch component 21 are respectively connected to the excitation voltage and the maintenance voltage, and the switch component drive circuit 22 is used to drive the switch component 21 to perform a switch switching action according to the signal of the first control module 8. Among them, the switch component can be a power electronic switch, a hard switch, a relay, etc., and the switch component drive circuit is a corresponding drive circuit, which is a conventional technical means in this field, so it is not repeated here.

[0040] The first control module 4 and the second control module 8 are both connected to an alarm module 9. It should be noted that the alarm module can be a conventional alarm, or a backend server with an alarm function, and the backend server generates an alarm after receiving the alarm information.

[0041] When working, the first output module will first switch the switch component to the excitation voltage for a few seconds, and then the switch component will switch to the maintenance voltage, and the drive circuit will be responsible for driving the action of the electronic switch.

[0042] When the self-check circuit finds that the power conversion circuit is abnormal, the self-check circuit will transmit the abnormal signal to the control module, the first control module communicates with the enabling circuit and controls the enabling circuit to stop the power conversion circuit, and the control module will transmit the abnormal information to the alarm module. At the same time, due to the real-time communication between the first control module and the second control module, the second control module monitors the abnormal information of the first control module alarm, and immediately starts the second power supply module to supply power to the electronic safety clamp, so as to avoid the electronic safety clamp being activated due to power failure and causing the elevator to trap people.

[0043] In one embodiment of the present invention, the first power supply module has the same structure as the second power supply module, and functions as a backup, and is activated when an abnormality occurs in the first power supply module.

[0044] Specifically: the second power supply module includes: a second power supply module 5 and a second output module 6; the control end of the second power supply module 5 is connected to the second control module 6, the output end of the second power supply module 5 is connected to the input end of the second output module 6, and the control end of the second output module 6 is connected to the second control module 8.

[0045] The second power supply module 5 is used to generate an excitation voltage and a maintenance voltage for the electronic safety clamp actuator to operate;

[0046] The second output module 6 is used to switch and output between the excitation voltage and the maintenance voltage of the second power supply module 5 .

[0047] The utility model further comprises: a second detection module 7 , wherein two input ends of the second detection module 7 are respectively connected to the input end and the output end of the second output module 6 , and the output end of the second detection module 7 is connected to the second control module 8 .

[0048] The second detection module 7 is used to collect the output voltage of the second output module 6 and the output voltage of the second power supply module 5. The second detection module 7 detects the redundant power supply system to ensure the stable operation of the power supply system. Its working process is the same as that of the first detection module, so it is not repeated here.

[0049] The specific working process of the utility model is as follows: due to the working characteristics of the electronic safety clamp, when the power is lost, the electronic safety clamp will be released and the guide rail will be clamped under the action of the reverse force of the spring because the actuator has no electromagnetic traction force when there is no power supply.

[0050] Therefore, the reliability of the power supply is very important. The purpose of dual-path redundancy is to ensure that when one power supply fails, the electronic safety clamp will not lose power and be activated, thus avoiding the incident of people being trapped in the elevator.

[0051] When the power supply is working, the first power module outputs excitation and maintenance voltages, the first output module first outputs the excitation voltage for a few seconds and then switches to the maintenance voltage to supply the electronic safety clamp, and the first detection module detects the input and output voltages of the first output module. When the input and output voltages of the first output module are inconsistent with the logic design voltage: for example, after excitation for a few seconds, the maintenance voltage should be output, and the actual measured voltage is the excitation voltage, it can be found that the first power module is abnormal.

[0052] When the input and output voltages of the first output module are inconsistent, it can be found that the first output module is abnormal.

[0053] At the same time, the first control module will communicate the abnormal information to the second control module in real time, and the second control module will immediately start the redundant circuit (second power supply module, second output module, second detection module).

[0054] Before the redundant circuit is started, the second control module and the first control module will also communicate in real time to notify the first control module of the state of the redundant circuit. The redundant circuit can be started when the first control module is in a normal and standby state.

[0055] When the first module circuit is working, the redundant circuit is also always performing self-test to determine the functionality of the redundant circuit.

[0056] When an abnormality occurs in the circuit of the first module, the redundant circuit can be immediately activated to prevent the electronic safety clamp from losing power.

[0057] When an abnormality occurs in the circuit of the first module, we can consider that it does not have a redundant function and there is a safety hazard. The control module sends the abnormal information to the client through the alarm module to inform it that the power supply needs to be replaced immediately to avoid safety hazards.

[0058] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An electronic safety clamp power supply system, characterized in that: include: A first power supply module, a first detection module (3), a first control module (4), a second power supply module, and a second control module (8); The control end of the first power supply module is connected to a first control module (4), the first detection module (3) is connected to the first power supply module, the control end of the second power supply module is connected to a second control module (8), and the first control module (4) is in communication connection with the second control module (8); The first power supply module and the second power supply module are used to generate a control voltage for the electronic safety clamp actuator to operate, and the first detection module (3) is used to detect the control voltage output by the first power supply module and generate a detection signal; When the first control module detects that the detection signal is abnormal, it controls the first power supply module to be turned off and generates a redundant control signal, and the second control module controls the second power supply module to be turned on according to the redundant control signal.

2. The electronic safety clamp power supply system according to claim 1, characterized in that: The first power supply module comprises: a first power supply module (1) and a first output module (2), the control end of the first power supply module (1) being connected to a first control module (4), the output end of the first power supply module (1) being connected to an input end of the first output module (2), the control end of the first output module (2) being connected to the first control module (4), the two input ends of the first detection module (3) being respectively connected to an input end and an output end of the first output module (2), and the output end of the first detection module (3) being connected to the first control module (4); The first power supply module (1) is used to generate an excitation voltage and a maintenance voltage for the electronic safety clamp actuator to operate; The first output module (2) is used to switch the output between the excitation voltage and the maintenance voltage of the first power supply module (1); The first detection module (3) is used to collect the output voltage of the first output module (2) and the output voltage of the first power module (1).

3. The electronic safety clamp power supply system according to claim 2, characterized in that: The first power supply module (1) comprises a voltage conversion circuit (11), an enable control circuit (12) and a self-test circuit (13); the input end of the voltage conversion circuit (11) is connected to an input voltage; the enable control circuit (12) is connected to the voltage conversion circuit (11); the self-test circuit is connected to the voltage conversion circuit (11); the enable control circuit (12) and the self-test circuit (13) are both connected to the first control module (4); the enable control circuit (12) is used to control the opening and closing of the voltage conversion circuit (11) according to a signal from the first control module (4); and the self-test circuit (13) is used to perform a self-test on the voltage conversion circuit (11).

4. The electronic safety clamp power supply system according to claim 2, characterized in that: The first output module (2) comprises a switch component (21) and a switch component drive circuit (22); an input end of the switch component drive circuit (22) is connected to the first control module (4); an output end of the switch component drive circuit (22) is connected to the control end of the switch component (21); a normally open contact and a normally closed contact of the switch component (21) are respectively connected to an excitation voltage and a holding voltage; and the switch component drive circuit (22) is used to drive the switch component (21) to perform a switch switching action according to a signal from the first control module (4).

5. The electronic safety clamp power supply system according to claim 1, characterized in that: The second power supply module comprises: a second power supply module (5) and a second output module (6); The control end of the second power module (5) is connected to the second control module (8), the output end of the second power module (5) is connected to the input end of the second output module (6), and the control end of the second output module (6) is connected to the second control module (8); The second power supply module (5) is used to generate an excitation voltage and a maintenance voltage for the electronic safety clamp actuator to operate; The second output module (6) is used to switch the output between the excitation voltage and the maintenance voltage of the second power supply module (5).

6. The electronic safety clamp power supply system according to claim 5, characterized in that: It also comprises a second detection module (7), wherein two input ends of the second detection module (7) are respectively connected to the input end and the output end of the second output module (6), and the output end of the second detection module (7) is connected to a second control module (8); The second detection module (7) is used to collect the output voltage of the second output module (6) and the output voltage of the second power supply module (5).

7. The electronic safety clamp power supply system according to claim 1, characterized in that: The first control module (4) and the second control module (8) are both connected to an alarm module (9).

8. The electronic safety clamp power supply system according to claim 1, characterized in that: The first power supply module has the same structure as the second power supply module.

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