CN221080908U - Redundant safety loop protection device for parking equipment - Google Patents
Redundant safety loop protection device for parking equipment Download PDFInfo
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- CN221080908U CN221080908U CN202322526356.6U CN202322526356U CN221080908U CN 221080908 U CN221080908 U CN 221080908U CN 202322526356 U CN202322526356 U CN 202322526356U CN 221080908 U CN221080908 U CN 221080908U
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- 230000000630 rising effect Effects 0.000 claims description 5
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Abstract
The utility model discloses a redundant safety loop protection device for parking equipment, which comprises a controller, an emergency stop switch, an upper limit protection relay, a locking chain protection relay, a control power supply, a total contactor, a lifting contactor, a descending contactor, an electromagnet control contactor, an overhaul relay, a plurality of lifting position contactors, a plurality of traversing position contactors, a plurality of thermal overload protectors, a plurality of upper limit switches and a plurality of descending chain release switches, wherein the upper limit switches are sequentially connected in series to form a lifting limit loop; a plurality of descending loose chain switches are sequentially connected in series to form a loose chain detection loop; the thermal overload protectors and the emergency stop switches are sequentially connected in series to form an emergency stop thermal overload protector loop, and the output end of the emergency stop thermal overload protector loop is divided into two branches. The redundant safety loop protection device for the parking equipment realizes redundant protection by a method of monitoring the safety loop entering the input end of the controller in a segmented way, and can realize the monitoring function of relay contact adhesion.
Description
Technical Field
The utility model relates to a redundant safety circuit protection device for parking equipment.
Background
In the design specification of the parking equipment industry, the upper limit protection and the lower limit protection are explicitly proposed to enter the relay protection, and the prior parking equipment basically has two methods, namely, a safety loop is connected to the PLC input end to ensure the safety control by means of the reliable monitoring of the PLC, the theoretical possibility of the adhesion of the PLC output end exists, a certain potential safety hazard exists, the operation of the parking equipment is controlled by three general contactors, namely, a total contactor, an ascending (or descending or electromagnet) contactor and a single-position contactor (realizing the control of a single motor), and the three contactors simultaneously act to execute a certain motion, so that the potential safety hazard of the parking equipment caused by the adhesion of the PLC output end rarely occurs, but the possibility of accidents caused by the adhesion really exists in theory.
Referring to fig. 1, the main circuit of the lifting and traversing parking equipment comprises an air switch QF1, a main contactor KM1, a lifting contactor KM1A, a descending contactor KM1B, a lifting thermal overload protector FR21S, a lifting motor M22S, a lifting motor M23S, a traversing motor M11H, a traversing motor M12H, a traversing thermal overload protector FR11H and a traversing thermal overload protector FR12H, wherein the air switch QF1 is connected with one end of the main contactor KM1, the other end of the main contactor KM1 is respectively connected with the lifting contactor KM1A and the descending contactor KM1B, the lifting contactor KM1A and the lowering contactor KM1B are respectively connected with a lifting thermal overload protector FR21S, a traversing position contactor KM11H and a traversing position contactor KM12H, the lifting thermal overload protector FR21S is respectively connected with a lifting position contactor KM21S, a lifting position contactor KM22S and a lifting position contactor KM23S, the lifting position contactor KM21S, the lifting position contactor KM22S and the lifting position contactor KM23S are connected with a lifting motor M21S, a lifting motor M22S and a lifting motor M23S in one-to-one correspondence, the traversing position contactor KM11H is connected with a traversing motor M11H through a traversing thermal overload protector FR11H, and the traversing position contactor KM12H is connected with a traversing motor M12H through a traversing thermal overload protector FR 12H.
The prior art basically controls the power supplied to each contactor through the output of the relay, and the other pair of contacts of the contactor are supplied to the PLC, so that the relay is not adhered due to the fact that the power of the power coil of the contactor is low. However, in theory, there is an extreme case of relay contact adhesion, so it becomes necessary to design a safer safety control loop device.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art, and provides a redundant safety loop protection device for parking equipment, which realizes redundant protection by a method of monitoring the input end of a controller by sectionally entering the safety loop, and can realize the monitoring function of relay contact adhesion through the controller.
The technical scheme for achieving the purpose is as follows: the utility model provides a redundant safety circuit protection device for parking equipment, includes controller, scram switch, upper limit protection relay, lockchain protection relay, control power, total contactor, rise contactor, decline contactor, electro-magnet control contactor, maintenance relay, a plurality of lift position contactor, a plurality of sideslip position contactor, a plurality of thermal overload protector, a plurality of upper limit switch and a plurality of decline lockchain switch, wherein:
The upper limit switches are sequentially connected in series to form an ascending limit loop, the upper limit protection relay is connected with one end of the ascending limit loop, and the connection ends of the upper limit protection relay and the ascending limit loop are connected to the input end X01 of the controller;
the falling loose chain switches are sequentially connected in series to form a loose chain detection loop, the loose chain protection relay is connected with one end of the loose chain detection loop, and the connection ends of the loose chain protection relay and the loose chain detection loop are connected to the input end X02 of the controller;
The output ends of the emergency stop thermal overload protector loops are divided into two branches, one branch is connected with the other end of the rising limit loop in series, and the other branch is connected with the other end of the loose chain detection loop in series;
Normally closed points of the ascending contactor, the descending contactor and the electromagnet control contactor are connected in series and then connected to an input end X03 of the controller;
the normally closed points of the lifting position contactors and the transverse position contactors are connected in series and then connected to the input end X04 of the controller;
the normally closed point of the maintenance relay is connected to the input end X05 of the controller;
The live wire L1 of the control power supply is connected in parallel with the live wire L2 of the power supply through the contacts of the upper limit protection relay and the anti-loosening chain protection relay, and the live wire L2 of the power supply is connected to the output public end COM1 and the output public end COM2 of the controller;
The zero line N1 of the control power supply is directly connected with the power supply zero line N2, and the zero line N1 of the control power supply forms a power supply zero line N3 through the contacts of the upper limit protection relay and the anti-loosening chain protection relay;
The main contactor, the ascending contactor, the descending contactor, the electromagnet control contactor and the maintenance relay are respectively connected to the output end of the controller and are connected with a power zero line N2;
the lifting position contactors and the transverse movement position contactors are respectively connected to the output end of the controller and are connected with a power zero line N3.
The redundant safety loop protection device for the parking equipment is characterized in that a common input end COM of the controller is connected with a 24V power supply.
The redundant safety circuit protection device for the parking equipment is characterized in that the thermal overload protector is divided into a lifting thermal overload protector and a traversing thermal overload protector.
The redundant safety loop protection device for the parking equipment realizes redundant protection by a method of monitoring the safety loop entering the input end of the controller in a segmented way, and simultaneously can realize the monitoring function of relay contact adhesion through the controller.
Drawings
FIG. 1 is an electrical schematic diagram of a main circuit of a lifting and traversing parking device;
FIG. 2 is an electrical schematic diagram of a redundant safety circuit protection device for a parking apparatus of the present utility model;
FIG. 3 is an electrical schematic diagram of an anti-blocking detection circuit;
fig. 4 is an electrical schematic of the contactor control circuit.
Detailed Description
In order to enable those skilled in the art to better understand the technical scheme of the present utility model, the following detailed description is provided with reference to the accompanying drawings:
Referring to fig. 2, 3 and 4, an embodiment of the present utility model provides a redundant safety circuit protection device for a parking facility, which includes a controller PLC, an emergency stop switch SJT1, an upper limit protection relay KA02, a lock chain protection relay KA03, a control power supply (live line L1/neutral line N1), a lifting thermal overload protector FR21S, a traversing thermal overload protector FR11H, a traversing thermal overload protector FR12H, an upper limit switch SJ21, an upper limit switch SJ22, an upper limit switch SJ23, a falling loose chain switch SL21, a falling loose chain switch SL22 and a falling loose chain switch SL23, a total contactor KM1, a rising contactor KM1A, a falling contactor KM1B, an electromagnet control contactor KM1D, a maintenance relay KA04, a lifting contactor KM21S, a lifting contactor KM22S and a lifting traversing contactor KM23S, a traversing contactor KM11H and a traversing contactor KM12H.
The upper limit switch SJ21, the upper limit switch SJ22 and the upper limit switch SJ23 are sequentially connected in series to form an ascending limit loop, the upper limit protection relay KA02 is connected with one end (the upper limit switch SJ 23) of the ascending limit loop, and the connection ends of the upper limit protection relay KA02 and the upper limit switch SJ23 are connected to the input end X01 of the controller PLC; the descending loose chain switch SL21, the descending loose chain switch SL22 and the descending loose chain switch SL23 are sequentially connected in series to form a loose chain detection loop, the loose chain protection relay KA03 is connected with one end (the descending loose chain switch SL 23) of the loose chain detection loop, and the connection ends of the loose chain protection relay KA03 and the loose chain detection loop are connected to the input end X02 of the controller;
The lifting thermal overload protector FR21S, the traversing thermal overload protector FR11H, the traversing thermal overload protector FR12H and the scram switch SJT1 are sequentially connected in series to form a scram thermal overload protector loop, the output end of the scram thermal overload protector loop is connected to the input end X00 of the controller PLC, the output end of the scram thermal overload protector loop is divided into two branches, one branch is connected in series with the other end (the upper limit switch SJ 21) of the lifting limit loop, and the other branch is connected in series with the other end (the descending chain loosening switch SL 21) of the chain loosening detection loop.
The total contactor KM1, the ascending contactor KM1A, the descending contactor KM1B, the electromagnet control contactor KM1D and the overhaul relay KA04 are connected to the output ends Y01-Y04 of the controller PLC in a one-to-one correspondence manner, and are connected with a power zero line N2. The lifting position contactor KM21S, the lifting position contactor KM22S, the lifting position contactor KM23S, the traversing position contactor KM11H and the traversing position contactor KM12H are connected to the output ends Y10-Y14 of the controller PLC in a one-to-one correspondence manner, and are connected with a power zero line N3.
The public input end COM of the controller is connected with a 24V power supply, and the output public end COM1 and the output public end COM2 of the controller are connected with a power supply live wire L2.
Referring to fig. 3, the normally closed points of the ascending contactor KM1A, the descending contactor KM1B and the electromagnet control contactor KM1D are connected in series and then connected to the input end X03 of the controller; normally closed points of the lifting position contactor KM21S, the lifting position contactor KM22S, the lifting position contactor KM23S, the traversing position contactor KM11H and the traversing position contactor KM12H are connected in series and then connected to an input end X04 of the controller PLC; the normally closed point of the overhaul relay KA04 is connected to the input end X05 of the controller PLC.
Referring to fig. 4 again, the live wire L1 of the control power supply is connected in parallel with the live wire L2 of the power supply through the contacts of the upper limit protection relay KA02 and the anti-loosening chain protection relay KA03, and the live wire L2 of the power supply is connected to the output public terminal COM1 and the output public terminal COM2 of the controller PLC (see fig. 2); the zero line N1 of the control power supply is directly connected with the power supply zero line N2, and the zero line N1 of the control power supply forms a power supply zero line N3 through contacts of the upper limit protection relay KA02 and the anti-loosening chain protection relay KA 03; the power zero line N2 is connected with the total contactor KM1, the ascending contactor KM1A, the descending contactor KM1B, the electromagnet control contactor KM1D and the overhaul relay KA04. The power zero line N3 connects the lifter contactor KM21S, lifter contactor KM22S, lifter contactor KM23S, traversing contactor KM11H, and traversing contactor KM12H (see fig. 2).
The redundant safety loop protection device for the parking equipment has the working principle that:
(1) Referring to fig. 1 and 2, the controller PLC determines whether the scram thermal overload protection circuit is turned on by detecting the state of the input terminal X00, and when detecting that the input of the input terminal X00 is 0, it indicates that the scram switch or the thermal overload protector in the scram thermal overload protection circuit is operated, and the controller PLC stops the output of each output terminal, and the total contactor KM1, the rising contactor KM1A, the falling contactor KM1B, the electromagnet control contactor KM1D and the maintenance relay KA04 stop outputting, and all the lifting position contactors and the traversing position contactors stop outputting. As shown in FIG. 1, the main loop of the parking equipment is completely disconnected, the ascending or descending tasks are stopped, and all the traversing motors and the lifting motors are stopped, so that one-time protection is realized.
(2) Referring to fig. 2 and 4, the two branches of the rising limit circuit and the loose chain detection circuit control the upper limit protection relay KA02 and the loose chain protection relay KA03 (see fig. 2) simultaneously, and when the upper limit protection relay KA02 and the loose chain protection relay KA03 are turned on, the upper limit protection relay KA02 and the loose chain protection relay KA03 act. When the upper limit protection relay KA02 and the anti-loose chain protection relay KA03 are conducted once one is conducted, the power live wire L2 is conducted with the live wire L1 of the control power supply, the power null wire N2 is directly connected to the null wire N1 of the control power supply, and when a loose chain disconnection fault (or an upper limit disconnection fault) occurs, the coil of the anti-loose chain protection relay KA03 (or the upper limit protection relay KA 02) is powered off to stop working, the power null wire N3 is disconnected with the null wire N1 of the control power supply, and at the moment, the lifting position contactor KM21S, the lifting position contactor KM22S, the lifting position contactor KM23S, the traversing position contactor KM11H and the traversing position contactor KM12H are powered off to stop working; at this time, if the controller PLC detects a loose chain fault, a maintainer can operate by entering a maintenance mode, and by pressing an up button to output a maintenance relay KA04 and an up contactor KM1A (or a down contactor KM1B or an electromagnet control contactor KM 1D), a normally open point of the up contactor KM1A (or the down contactor KM1B or the electromagnet control contactor KM 1D) is closed, a normally open point of the maintenance relay KA04 is closed, and a zero line N1 of a control power supply is conducted with a zero line N3 of the power supply, so that the up can be maintained; otherwise, if the upper limit loop is detected to be disconnected by the PLC at the moment, the maintenance descending can be realized by entering the maintenance mode. As described above, the upper limit protection relay KA02 and the anti-loose chain protection relay KA03 are used for disconnecting the power supply of each contactor to realize another protection, so that the controller PLC logic protection and the hardware circuit protection of the relay contacts are realized, and the redundant safety loop protection is realized, thus being a perfect solution.
(3) Referring to fig. 2 and 3, since the blocking may cause a short circuit between the zero line N1 of the control power and the zero line N3 of the power, and thus the double protection function cannot be lost, the maintenance relay KA04 is specially designed to break the blocking point, and the maintenance operation can be performed only when the maintenance relay KA04 sucks, in consideration of the blocking situation that may exist in the ascending contactor KM1A or the descending contactor KM1B or the electromagnet control contactor KM1D. In order to prevent the danger caused by the adhesion of each contactor and the relay, anti-adhesion detection is specially designed, the adhesion of each contactor and the relay is detected through the input end X03, the input end X04 and the input end X05 of the controller, once the controller does not output at the output end Y01, the output end Y02 and the output end Y03, and the input end X03 does not input signals, the fault is judged to be the adhesion of the directional contactor, and the directional contactor refers to the ascending contactor KM1A, the descending contactor KM1B and the electromagnet control contactor KM1D. The controller also does not output at the output end Y10, the output end Y11, the output end Y12, the output end Y13 and the output end Y14, and when a signal is input at the input end X04, the controller judges that the adhesion failure of the position contactor is caused, and the position contactor refers to a lifting position contactor KM21S, a lifting position contactor KM22S, a lifting position contactor KM23S, a traversing position contactor KM11H and a traversing position contactor KM12H. Likewise, the controller determines that the maintenance relay has adhesion failure when no signal is input to the input terminal X05 and no output is output to the output terminal Y04.
The output end of the emergency stop thermal overload protector loop is connected with the input end of the controller at the same time, and the output of the contactor is controlled by the logic control of the controller to realize the redundancy protection of the safety loop protection. The output end of the emergency stop thermal overload protector loop is divided into two branches, one branch detects the ascending (is connected with the ascending limit loop) and the other branch detects the descending (is connected with the loose chain detection loop), so that a descending instruction can be output through the controller when the ascending safety loop is disconnected, and the contacts of the overhaul relay and the descending contactor are utilized to provide power for the contactor, so that overhaul descending operation is realized, convenient operation is provided for overhaul, and meanwhile, the ascending can be overhauled when the descending safety loop is disconnected. Meanwhile, redundant protection for overhauling operation is realized through detection of the PLC input end. The adhesion protection of the control power supply loop of the alignment contactor is realized through the normally closed point of the overhaul relay KA04 and the ascending contactor KM1A, and the three paths of the overhaul relay, the direction contactor and the alignment contactor are separated and anti-adhesion detection is realized.
The redundant safety loop protection device for the parking equipment has the functions of logic protection of the input end of the controller and relay protection, can realize redundant safety loop protection, reduces the length of the safety loop by designing a method with double branch lines, avoids serious influence on operation due to line loss caused by overlong safety loop lines, ensures the stability of the system, and realizes maintenance reverse operation by the method with double branch lines, thereby being simpler and more convenient to maintain.
In summary, the redundant safety loop protection device for the parking equipment realizes redundant protection by a method of monitoring the safety loop entering the input end of the controller in a segmented way, and simultaneously can realize the monitoring function of relay contact adhesion through the controller.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the utility model, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the utility model as long as they fall within the true spirit of the utility model.
Claims (3)
1. The utility model provides a redundant safety circuit protection device for parking equipment, its characterized in that includes controller, scram switch, upper limit protection relay, chain locking protection relay, control power supply, total contactor, rise contactor, decline contactor, electro-magnet control contactor, maintenance relay, a plurality of lift position contactor, a plurality of sideslip position contactor, a plurality of thermal overload protector, a plurality of upper limit switch and a plurality of decline chain locking switch, wherein:
The upper limit switches are sequentially connected in series to form an ascending limit loop, the upper limit protection relay is connected with one end of the ascending limit loop, and the connection ends of the upper limit protection relay and the ascending limit loop are connected to the input end X01 of the controller;
the falling loose chain switches are sequentially connected in series to form a loose chain detection loop, the loose chain protection relay is connected with one end of the loose chain detection loop, and the connection ends of the loose chain protection relay and the loose chain detection loop are connected to the input end X02 of the controller;
The output ends of the emergency stop thermal overload protector loops are divided into two branches, one branch is connected with the other end of the rising limit loop in series, and the other branch is connected with the other end of the loose chain detection loop in series;
Normally closed points of the ascending contactor, the descending contactor and the electromagnet control contactor are connected in series and then connected to an input end X03 of the controller;
the normally closed points of the lifting position contactors and the transverse position contactors are connected in series and then connected to the input end X04 of the controller;
the normally closed point of the maintenance relay is connected to the input end X05 of the controller;
The live wire L1 of the control power supply is connected in parallel with the live wire L2 of the power supply through the contacts of the upper limit protection relay and the anti-loosening chain protection relay, and the live wire L2 of the power supply is connected to the output public end COM1 and the output public end COM2 of the controller;
The zero line N1 of the control power supply is directly connected with the power supply zero line N2, and the zero line N1 of the control power supply forms a power supply zero line N3 through the contacts of the upper limit protection relay and the anti-loosening chain protection relay;
The main contactor, the ascending contactor, the descending contactor, the electromagnet control contactor and the maintenance relay are respectively connected to the output end of the controller and are connected with a power zero line N2;
the lifting position contactors and the transverse movement position contactors are respectively connected to the output end of the controller and are connected with a power zero line N3.
2. A redundant safety loop protection apparatus for a parking facility as defined in claim 1 wherein said common input COM of said controller is connected to a 24V power supply.
3. A redundant safety circuit protection device for a parking facility as defined in claim 1, wherein said thermal overload protectors are divided into a lift thermal overload protector and a traversing thermal overload protector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322526356.6U CN221080908U (en) | 2023-09-18 | 2023-09-18 | Redundant safety loop protection device for parking equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322526356.6U CN221080908U (en) | 2023-09-18 | 2023-09-18 | Redundant safety loop protection device for parking equipment |
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| Publication Number | Publication Date |
|---|---|
| CN221080908U true CN221080908U (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322526356.6U Active CN221080908U (en) | 2023-09-18 | 2023-09-18 | Redundant safety loop protection device for parking equipment |
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| CN (1) | CN221080908U (en) |
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- 2023-09-18 CN CN202322526356.6U patent/CN221080908U/en active Active
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