CN216512480U - Crown block anti-top-collision protection circuit - Google Patents
Crown block anti-top-collision protection circuit Download PDFInfo
- Publication number
- CN216512480U CN216512480U CN202122174270.2U CN202122174270U CN216512480U CN 216512480 U CN216512480 U CN 216512480U CN 202122174270 U CN202122174270 U CN 202122174270U CN 216512480 U CN216512480 U CN 216512480U
- Authority
- CN
- China
- Prior art keywords
- main control
- control loop
- contactor
- audible
- normally closed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control And Safety Of Cranes (AREA)
Abstract
The utility model discloses a crown block anti-top-impact protection circuit, which comprises a rising button; a normally closed contact of the heavy hammer limiter, a normally closed contact of the descending contactor KM2 and a coil of the ascending contactor KM1 are connected in series to form a closed main control loop; a coil of the intermediate relay is connected in parallel with a normally closed contact of a descending contactor KM2 and a coil of a ascending contactor KM1 of a main control loop; the normally open contact of the heavy hammer limiter is connected with the first audible and visual alarm in series and then is connected with the main control loop in parallel, and the normally closed contact of the intermediate relay is connected with the second audible and visual alarm in series and then is connected with the main control loop in parallel. The advantages are that: the utility model can find the fault of the heavy hammer limiter in time, and effectively avoid the potential safety hazard; in addition, through observing the alarm condition of first audible-visual annunciator and second audible-visual annunciator, can make clear and determine the concrete damage position of weight stopper, and then can carry out corresponding maintenance or change and handle, need not wholly change the weight stopper, be favorable to reduce cost, accurate change spare parts shortens the repair time moreover.
Description
The technical field is as follows:
the utility model relates to the technical field of crown block equipment, in particular to a crown block anti-top-collision protection circuit.
Background art:
the crown block is provided with a heavy hammer limiter at a lifting limit position, namely a switch for limiting the lifting position, so that the lifting appliance can be lifted to the limit; the crown block often has the phenomenon of failure of a heavy hammer limiter in use, so that the crown block rushes to the top, a lifting hook is damaged, a safety production accident occurs, and the production is seriously influenced; the heavy hammer limiter is arranged at a higher position above the overhead travelling crane, when a fault occurs, normal action and the fault are not easy to detect, and potential safety hazards are easy to cause; in addition, after the current weight limiter is damaged, the specific damaged part of the weight limiter cannot be determined clearly, and only the whole weight limiter can be replaced, so that the replacement cost is high.
The utility model has the following contents:
the utility model aims to provide an overhead traveling crane anti-collision protection circuit which can find out the failure of a heavy hammer limiter in time so as to avoid potential safety hazards.
The utility model is implemented by the following technical scheme: a crown block anti-top-collision protection circuit comprises a rising button SB, an intermediate relay KA, a heavy hammer limiter SQ, a rising contactor KM1 and a falling contactor KM 2; the normally closed contact of the weight limiter SQ, the normally closed contact of the descending contactor KM2 and the coil of the ascending contactor KM1 are connected in series to form a closed main control loop; the coil of the intermediate relay KA is connected in parallel with the normally closed contact of the descending contactor KM2 and the coil of the ascending contactor KM1 of the main control loop; the normally open contact of the heavy hammer limiter SQ is connected with the first audible and visual alarm in series and then is connected with the main control loop in parallel, and the normally closed contact of the intermediate relay KA is connected with the second audible and visual alarm in series and then is connected with the main control loop in parallel; the ascending button SB is connected in series on the main control loop.
Furthermore, the model number of the weight limiter SQ is LX 3-11H.
The utility model has the advantages that: when the weight limiter SQ is normal and intact, pressing the rising button SB, and electrifying the main control loop; the coil of the ascending contactor KM1 and the coil of the intermediate relay KA are simultaneously electrified, meanwhile, the normally closed contact of the intermediate relay KA is disconnected, the first audible and visual alarm does not give an alarm, the second audible and visual alarm does not give an alarm, when the ascending hook normally touches the heavy hammer limiter SQ, the normally closed contact of the heavy hammer limiter SQ is disconnected, the main control loop is powered off, and the overhead travelling crane stops ascending; meanwhile, a normally open contact of the heavy hammer limiter SQ is closed, the first audible and visual alarm gives an alarm, the coil of the ascending contactor KM1 and the coil of the intermediate relay KA are both powered off, the normally closed contact of the intermediate relay KA is restored to a closed state from an open state, and the second audible and visual alarm gives an alarm; the operator is alerted to the normal arrival at the rise limit.
When the rising button SB is pressed, the phenomenon that the overhead traveling crane cannot rise occurs, and at the moment, the overhead traveling crane does not reach the rising limit, the first audible and visual alarm and the second audible and visual alarm give an alarm at the same time, so that the main control loop is disconnected, and the worker is reminded that the heavy hammer of the heavy hammer limit device SQ falls off.
When the rising button SB is pressed, the phenomenon that the overhead traveling crane cannot rise occurs, and at the moment, the overhead traveling crane does not reach the rising limit yet, but only the second acousto-optic alarm gives an alarm, and when the first acousto-optic alarm does not give an alarm, the normally open contact and the normally closed contact of the heavy hammer limiter SQ cannot work normally, so that an operator is reminded that the contact mechanism in the heavy hammer limiter SQ is damaged or the reset spring is damaged.
Pressing the rising button SB, the overhead traveling crane rises normally, when the weight stopper SQ was touchhed to the lifting hook, the unable back that rises of overhead traveling crane, only the second acousto-optic alarm of appearance was reported to the police, and when first acousto-optic alarm was not reported to the police, it was intact to show the normally closed contact of weight stopper SQ, and the normally open contact of weight stopper SQ damages or reset spring damages.
Therefore, the failure of the heavy hammer limiter can be found in time through the utility model, and the potential safety hazard is effectively avoided; in addition, through observing the alarm condition of first audible-visual annunciator and second audible-visual annunciator, can make clear and determine the concrete damage position of weight stopper, and then can carry out corresponding maintenance or change and handle, need not wholly change the weight stopper, be favorable to reduce cost, accurate change spare parts shortens the repair time moreover.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
The parts in the drawings are numbered as follows: a first audible and visual alarm 1, a second audible and visual alarm 2 and a main control loop 3.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, the present embodiment provides a crown block anti-collision protection circuit, which includes a lifting button SB, an intermediate relay KA, a weight limiter SQ, a lifting contactor KM1, and a lowering contactor KM 2; a closed main control loop 3 is formed by connecting a normally closed contact of the weight limiter SQ, a normally closed contact of the descending contactor KM2 and a coil of the ascending contactor KM1 in series; the coil of the intermediate relay KA is connected in parallel with the normally closed contact of the descending contactor KM2 and the coil of the ascending contactor KM1 on the main control loop 3; a normally open contact of the heavy hammer limiter SQ is connected with the first audible and visual alarm 1 in series and then is connected with the main control loop 3 in parallel, and a normally closed contact of the intermediate relay KA is connected with the second audible and visual alarm 2 in series and then is connected with the main control loop 3 in parallel; the main control loop 3 is connected with a rising button SB in series; the model number of the weight limiter SQ is LX 3-11H.
The working principle is as follows:
firstly, normal working conditions:
1. when the weight limiter SQ is normal and intact, pressing the rising button SB, and electrifying the main control loop 3; the coil of rising contactor KM1 and the coil of auxiliary relay KA are electrified simultaneously, and the main contact of rising contactor KM1 is closed, and the overhead traveling crane rises, and the normally closed contact disconnection of auxiliary relay KA simultaneously, first audible-visual annunciator 1 does not report to the police, and second audible-visual annunciator 2 does not report to the police, when the weight stopper SQ is not touch to the lifting hook, normally rises, reminds operating personnel this moment to rise normally.
2. When the lifting hook normally touches the heavy hammer limiter SQ, the normally closed contact of the heavy hammer limiter SQ is disconnected, the main control loop 3 is powered off, the main contact of the lifting contactor KM1 is disconnected, and the overhead traveling crane stops lifting; meanwhile, a normally open contact of the heavy hammer limiter SQ is closed, the first audible and visual alarm 1 gives an alarm, meanwhile, the coil of the ascending contactor KM1 and the coil of the intermediate relay KA are both powered off, the normally closed contact of the intermediate relay KA is restored to a closed state from an open state, and the second audible and visual alarm 2 gives an alarm; at which point the operator is alerted that the lift limit has been reached.
Secondly, abnormal working conditions:
1. when the rising button SB is pressed, the crown block cannot rise, and the crown block does not reach the rising limit at the moment, the first audible and visual alarm 1 and the second audible and visual alarm 2 give an alarm at the same time, so that the main control loop 3 is disconnected, and workers are reminded that the heavy hammer of the heavy hammer limiter SQ falls off and needs to be replaced.
2. When the rising button SB is pressed, the phenomenon that the crown block cannot rise occurs, and at the moment, the crown block does not reach the rising limit yet, but only the second acousto-optic alarm 2 gives an alarm, and the first acousto-optic alarm 1 does not give an alarm, which indicates that the normally open contact and the normally closed contact of the weight limiter SQ cannot work normally, and reminds an operator that a contact mechanism in the weight limiter SQ is damaged or a reset spring is damaged.
3. Pressing the rising button SB, the overhead traveling crane rises normally, when the lifting hook runs into weight stopper SQ, the unable back that rises of overhead traveling crane, the appearance only reports to the police of second sound light alarm 2, and when first sound light alarm 1 does not report to the police, shows that the normally closed contact of weight stopper SQ is intact, and the normally open contact damage or the reset spring damage of weight stopper SQ.
Therefore, the failure of the heavy hammer limiter can be found in time through the utility model, and the potential safety hazard is effectively avoided; in addition, through observing the alarm conditions of the first audible and visual alarm 1 and the second audible and visual alarm 2, the specific damaged part of the weight limiter can be made clear, and then targeted maintenance or replacement treatment can be carried out, the weight limiter does not need to be integrally replaced, the cost is reduced, replacement spare parts are accurately replaced, and the maintenance time is shortened.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (2)
1. A crown block anti-top-collision protection circuit is characterized by comprising a rising button SB, an intermediate relay KA, a heavy hammer limiter SQ, a rising contactor KM1 and a falling contactor KM 2; the normally closed contact of the weight limiter SQ, the normally closed contact of the descending contactor KM2 and the coil of the ascending contactor KM1 are connected in series to form a closed main control loop; the coil of the intermediate relay KA is connected in parallel with the normally closed contact of the descending contactor KM2 and the coil of the ascending contactor KM1 of the main control loop; the normally open contact of the heavy hammer limiter SQ is connected with the first audible and visual alarm in series and then is connected with the main control loop in parallel, and the normally closed contact of the intermediate relay KA is connected with the second audible and visual alarm in series and then is connected with the main control loop in parallel; the ascending button SB is connected in series on the main control loop.
2. The overhead traveling crane anti-collision protection circuit as claimed in claim 1, wherein the weight limiter SQ is model number LX 3-11H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122174270.2U CN216512480U (en) | 2021-09-08 | 2021-09-08 | Crown block anti-top-collision protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122174270.2U CN216512480U (en) | 2021-09-08 | 2021-09-08 | Crown block anti-top-collision protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216512480U true CN216512480U (en) | 2022-05-13 |
Family
ID=81515221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122174270.2U Active CN216512480U (en) | 2021-09-08 | 2021-09-08 | Crown block anti-top-collision protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216512480U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116002535A (en) * | 2023-03-24 | 2023-04-25 | 无锡国起电子科技有限公司 | Hoist anti-collision device on hoisting equipment |
-
2021
- 2021-09-08 CN CN202122174270.2U patent/CN216512480U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116002535A (en) * | 2023-03-24 | 2023-04-25 | 无锡国起电子科技有限公司 | Hoist anti-collision device on hoisting equipment |
| CN116002535B (en) * | 2023-03-24 | 2023-11-21 | 无锡国起电子科技有限公司 | Hoist anti-collision device on hoisting equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216512480U (en) | Crown block anti-top-collision protection circuit | |
| CN101343023B (en) | Comprehensive protector for safety of tower crane | |
| CN206069222U (en) | Ocean platform crane on-site control device | |
| CN202657895U (en) | Improved steel wire rope electric hoist position-limiting device | |
| CN205442423U (en) | Control and control management system of hoist | |
| CN202429972U (en) | Alarm device for soft leg of hydraulic aerial cage | |
| CN216426524U (en) | Crown block rising control circuit | |
| CN207142707U (en) | A kind of Novel electric block | |
| CN214202591U (en) | Falling protector with motion induction | |
| CN215084545U (en) | Corridor safety fire control detecting system | |
| CN108131019A (en) | A kind of discharging platform construction safety system | |
| CN211034944U (en) | Mechanical brake abnormity detection controller of crown block lifting system | |
| CN205195117U (en) | Prevent mistake and touch 10 kilovolts of electrified equipment infrared induction alarm device | |
| CN211501178U (en) | Hydraulic overload protection device | |
| CN204714364U (en) | Lifting height of crane control setup | |
| CN102254386A (en) | Audible-visual alarm system | |
| CN114541977A (en) | Safety protection system of A-type drilling tower for wire line coring | |
| CN208250438U (en) | A kind of novel fishing anode unit device of electrolytic cell | |
| CN213834243U (en) | Crane hook structure that security performance is high | |
| CN205170195U (en) | Mono overhead crane limit ton device | |
| CN201626777U (en) | Comprehensive safety protection device of hoisting equipment | |
| CN209291858U (en) | A kind of Anti-over-hoisting device of electric block | |
| CN218861408U (en) | Double-reminding function early warning height limiting device | |
| CN216471755U (en) | Supplementary concrete spreader hangs frock that moves | |
| CN209276009U (en) | A kind of bridging crane main beam structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |