CN210428786U - Gate limit fault alarm control circuit - Google Patents
Gate limit fault alarm control circuit Download PDFInfo
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- CN210428786U CN210428786U CN201921257152.4U CN201921257152U CN210428786U CN 210428786 U CN210428786 U CN 210428786U CN 201921257152 U CN201921257152 U CN 201921257152U CN 210428786 U CN210428786 U CN 210428786U
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Abstract
The utility model relates to a malfunction alerting technical field, the utility model discloses aim at solving the current problem that wastes time and energy of door limit troubleshooting, provide a door limit malfunction alerting control circuit, include: the positive pole of the first power input end is connected with one end of a coil of each relay and one end of a normally closed contact of each relay respectively, one gate limit switch corresponds to one relay one by one, the other end of the coil of each relay is connected with the negative pole of the first power input end through the gate limit switch corresponding to the other end, and the other end of the normally closed contact of each relay is connected with the negative pole of the first power input end through the alarm. When one or more gate limits are in fault, the alarm can be used for giving an alarm, and according to the corresponding relation between the relay and the gate limits, the specific gate limit or the gate limits are in fault can be quickly judged, so that the speed of troubleshooting the gate limits is increased.
Description
Technical Field
The utility model relates to a malfunction alerting technical field relates to a door limit malfunction alerting control circuit particularly.
Background
In order to safely get on and off a crane driver or a worker, door limits are usually installed at the positions where the crane driver or the worker must pass through, when the crane driver or the worker goes on and off the crane, the control system of the crane is stopped through the door limits, for example, the door limits are respectively arranged on a platform, a front end beam, an escalator and a rear end beam of the crane, when one of the door limits is in an open state, the control system of the crane is in a disconnected state, so that the crane driver or the worker can safely get on and off the crane, and the safety of the crane driver or the worker is ensured. However, if the gate limits are damaged, the crane structures may not operate under normal conditions, and the operation efficiency is affected. In the prior art, when a gate limit fails, a worker usually needs to analyze the failure of the whole control system and check the gate limits one by one, which wastes time and labor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving the current problem that wastes time and energy of door limit troubleshooting, provide a door limit malfunction alerting control circuit.
The utility model provides a technical scheme that above-mentioned technical problem adopted is: a gate limit fault alarm control circuit for a crane control system having N gate limits, comprising: first power input, alarm, a N gate limit switch and a N relay, the positive pole of first power input is connected with the one end of the coil of each relay and the one end of the normally closed contact of each relay respectively, a gate limit switch and a relay one-to-one, the other end of the coil of every relay is connected with the negative pole of first power input through the gate limit switch who corresponds rather than, and the other end of the normally closed contact of each relay all is connected with the negative pole of first power input through the alarm, N is for being greater than 1 positive integer.
Further, in order to cut off the control system of the crane when the gate limit is failed, the gate limit failure alarm control circuit further comprises: second power input end, button switch, lock button switch and contactor, the positive pole of second power input end loops through button switch, lock button switch, the normally open contact of each relay and the coil of contactor and is connected with the negative pole of second power input end, and the normally open contact of each relay establishes ties, the first normally open contact and the button switch of contactor are parallelly connected, and the control system of hoist passes through the second normally open contact power supply of contactor.
Further, in order to enable the coil of the worker contactor to be in an energized state, the door limit fault alarm control circuit further comprises: and the indicator light is connected with the coil of the contactor in parallel.
Further, for performing overcurrent protection on the circuit, the gate limit fault alarm control circuit further includes: and the overcurrent relay is connected with the coil of the contactor in series.
Further, for directly perceivedly reporting to the police to door limit trouble, the alarm includes bee calling organ and alarm lamp, bee calling organ and alarm lamp are parallelly connected.
The utility model has the advantages that: gate limit malfunction alerting control circuit, through setting up the relay that alarm AND gate limit switch corresponds quantity, when one of them or a plurality of door limits broke down, all can report to the police through the alarm, the staff can in time know the door limit broke down to can be according to the corresponding relation of relay AND gate limit, the snap judgments specifically is which one or a plurality of gate limits broke down, improved the speed of gate limit troubleshooting, improved equipment operating efficiency, the cost is reduced.
Drawings
Fig. 1 is a schematic circuit diagram of a gate limit fault alarm control circuit according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another circuit structure of a gate limit fault alarm control circuit according to an embodiment of the present invention;
description of reference numerals:
vin1+ -the positive pole of the first supply input terminal; vin1 — the negative pole of the first supply input; vin2+ -the positive pole of the second supply input terminal; vin2 — the negative pole of the second supply input terminal; j1-coil of first relay; j2 — coil of second relay; j3 — coil of third relay; j4 — coil of fourth relay; j11 — normally closed contact of first relay; j21 — normally closed contact of second relay; j31 — normally closed contact of third relay; j41 — normally closed contact of fourth relay; j12 — normally open contact of first relay; j22 — normally open contact of second relay; j32 — normally open contact of third relay; j42 — normally open contact of fourth relay; s1-first gate limit switch; s2-second door limit switch; s3-a third gate limit switch; s4-fourth door limit switch; s5-a push-button switch; s6-lock button switch; h1-buzzer; h2-warning light; h3-signal lamp; f1-overcurrent relay; k0-coil of contactor; k01-first normally open contact of the contactor.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Gate limit malfunction alerting control circuit, be applied to the hoist control system who has a N door limit, include: first power input, alarm, a N gate limit switch and a N relay, the positive pole of first power input is connected with the one end of the coil of each relay and the one end of the normally closed contact of each relay respectively, a gate limit switch and a relay one-to-one, the other end of the coil of every relay is connected with the negative pole of first power input through the gate limit switch who corresponds rather than, and the other end of the normally closed contact of each relay all is connected with the negative pole of first power input through the alarm, N is for being greater than 1 positive integer.
In practical application, under normal conditions, namely when no gate limit fails, all gate limit switches are closed, coils of all relays are electrified, normally closed contacts of all relays are disconnected, and the alarm does not send out an alarm when the alarm is not electrified; when a certain gate limit is in fault, the gate limit switch is switched off, the coil of the corresponding relay is switched off, the normally closed contact of the relay is closed due to the coil power-off, the alarm is powered on to give an alarm, the worker is reminded of the fault of the gate limit, and the worker can judge which gate limit is in fault according to the corresponding relation between the relay and the gate limit.
Examples
The embodiment of the utility model provides a gate limit malfunction alerting control circuit, be applied to the crane control system who has a N door limit, as shown in figure 1, include: first power input terminal Vin1, alarm, N gate limit switch and N relays, first power input terminal's positive pole Vin1+ is connected with the one end of the coil of each relay and the one end of the normally closed contact of each relay respectively, a gate limit switch and a relay one-to-one, the other end of the coil of every relay and the gate limit switch that corresponds thereof are connected with first power input terminal's negative pole Vin1-, the other end of the normally closed contact of each relay all is connected with first power input terminal's negative pole Vin 1-through the alarm, N is for being greater than 1 positive integer.
As shown in fig. 1, the present embodiment includes 4 gate limit switches and 4 relays, where the 4 gate limit switches are respectively: the first gate limit switch S1, the second gate limit switch S2, the third gate limit switch S3 and the fourth gate limit switch S4, the first gate limit switch S1 may be disposed on the platform, the second gate limit switch S2 may be disposed on the front end beam, the third gate limit switch S3 may be disposed on the escalator, and the fourth gate limit switch S4 may be disposed on the rear end beam; the coils of the 4 relays are respectively: the coil J1 of the first relay, the coil J2 of the second relay, the coil J3 of the third relay and the coil J4 of the fourth relay, and the normally closed contacts of the 4 relays are respectively: the normally closed contact J11 of the first relay, the normally closed contact J21 of the second relay, the normally closed contact J31 of the third relay and the normally closed contact J41 of the fourth relay, wherein a first gate limit switch S1 is connected with a coil J1 of the first relay in series, a second gate limit switch S2 is connected with a coil J2 of the second relay in series, a third gate limit switch S3 is connected with a coil J3 of the third relay in series, a fourth gate limit switch S4 is connected with a coil J4 of the fourth relay in series, and the normally closed contact J11 of the first relay, the normally closed contact J21 of the second relay, the normally closed contact J31 of the third relay and the normally closed contact J41 of the fourth relay are connected in parallel.
In order to improve the alarm effect, the alarm in the embodiment comprises a buzzer H1 and a warning lamp H2, wherein the buzzer H1 and the warning lamp H2 are connected in parallel.
The circuit principle is as follows: when a gate limit switch fails, for example, the first gate limit switch S1 fails, the first gate limit switch S1 is turned off, and at this time, the coil J1 of the first relay corresponding to the first gate limit switch S1 is powered off, correspondingly, the normally closed contact J11 of the first relay is closed due to the power off of the coil J1 of the first relay, the buzzer H1 and the alarm lamp H2 are powered on to give an alarm, a worker can go to the gate limit to be failed through the buzzer H1 and the alarm lamp H2, and quickly judges that the first gate limit switch S1 has a fault according to the corresponding relation between the relay and the gate limit, and in addition, corresponding indicator lights can be arranged on each relay to indicate the attraction of the relays, when the coil of the relay is electrified, the corresponding indicator light is turned on, and the staff can judge whether the corresponding gate limit is in fault or not through the on-off of the indicator light.
Optionally, the gate limit fault alarm control circuit described in this embodiment further includes: the crane control system comprises a second power input end Vin2, a button switch S5, a lock button switch S6 and a contactor, wherein the positive electrode Vin2+ of the second power input end is connected with the negative electrode Vin 2-of the second power input end sequentially through the button switch S5, the lock button switch S6, normally open contacts of relays and a coil KO of the contactor, the normally open contacts of the relays are connected in series, a first normally open contact K01 of the contactor is connected with the button switch S5 in parallel, and a control system of the crane supplies power through the second normally open contact (not shown in the figure) of the contactor.
In this embodiment, the normally open contact of the relay includes: the normally open contact J12 of the first relay, the normally open contact J22 of the second relay, the normally open contact J32 of the third relay and the normally open contact J42 of the fourth relay are connected in series.
In order to make the worker know the attraction state of the contactor, an indicator lamp H3 connected in parallel with a coil K0 of the contactor may be further provided.
An overcurrent relay can also be provided in series with the coil KO of the contactor in order to overcurrent protect the circuit.
The circuit principle is as follows: when the control system of the crane needs to be controlled to normally work, a worker switches the lock button switch S6 to be in a closed state, presses the button switch S5, when all the door limit switches are closed, the coil K0 of the contactor is electrified, so that the first normally closed contact K01 of the contactor is closed to form a self-locking loop, the control system of the crane normally supplies power at the moment, when a certain door limit switch is opened due to a fault, for example, when the first door limit switch S1 is opened due to a fault, the coil J1 of the corresponding first relay is powered off, so that the normally open contact J12 of the first relay is disconnected, the coil K0 of the contactor is powered off, the first normally open contact K01 of the contactor is disconnected, the self-locking loop cannot be formed, in addition, the second normally open contact of the contactor is also disconnected, so that the power supply of the control system of the crane is disconnected, and the control system of the crane cannot normally work at, thereby ensuring the safety of the crane driver or the working personnel.
Claims (5)
1. Gate limit fault alarm control circuit is applied to the hoist control system who has N gate limit, its characterized in that includes: first power input, alarm, a N gate limit switch and a N relay, the positive pole of first power input is connected with the one end of the coil of each relay and the one end of the normally closed contact of each relay respectively, a gate limit switch and a relay one-to-one, the other end of the coil of every relay is connected with the negative pole of first power input through the gate limit switch who corresponds rather than, and the other end of the normally closed contact of each relay all is connected with the negative pole of first power input through the alarm, N is for being greater than 1 positive integer.
2. The gate limit fault alarm control circuit of claim 1, further comprising: second power input end, button switch, lock button switch and contactor, the positive pole of second power input end loops through button switch, lock button switch, the normally open contact of each relay and the coil of contactor and is connected with the negative pole of second power input end, and the normally open contact of each relay establishes ties, the first normally open contact and the button switch of contactor are parallelly connected, and the second normally open contact power supply that the hoist passes through the contactor.
3. The gate limit fault alarm control circuit of claim 2, further comprising: and the indicator light is connected with the coil of the contactor in parallel.
4. The gate limit fault alarm control circuit of claim 2, further comprising: and the overcurrent relay is connected with the coil of the contactor in series.
5. The gate limit fault alarm control circuit of claim 1, wherein the alarm comprises a buzzer and an alarm lamp, the buzzer and the alarm lamp being connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921257152.4U CN210428786U (en) | 2019-08-05 | 2019-08-05 | Gate limit fault alarm control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921257152.4U CN210428786U (en) | 2019-08-05 | 2019-08-05 | Gate limit fault alarm control circuit |
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| Publication Number | Publication Date |
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| CN210428786U true CN210428786U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921257152.4U Active CN210428786U (en) | 2019-08-05 | 2019-08-05 | Gate limit fault alarm control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112319338A (en) * | 2020-10-21 | 2021-02-05 | 三一汽车制造有限公司 | Box door alarm control system, box door alarm control method and working vehicle |
-
2019
- 2019-08-05 CN CN201921257152.4U patent/CN210428786U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112319338A (en) * | 2020-10-21 | 2021-02-05 | 三一汽车制造有限公司 | Box door alarm control system, box door alarm control method and working vehicle |
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