CN110775827A - Rope breakage prevention early warning device, control method thereof and crane - Google Patents
Rope breakage prevention early warning device, control method thereof and crane Download PDFInfo
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- CN110775827A CN110775827A CN201911063498.5A CN201911063498A CN110775827A CN 110775827 A CN110775827 A CN 110775827A CN 201911063498 A CN201911063498 A CN 201911063498A CN 110775827 A CN110775827 A CN 110775827A
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- early warning
- length sensor
- winding drum
- warning device
- sensing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
- B66C15/06—Arrangements or use of warning devices
- B66C15/065—Arrangements or use of warning devices electrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention discloses a rope breakage prevention early warning device, a control method thereof and a crane, and relates to the technical field of engineering machinery. Including controller, length sensor, reel, stay cord and alarm component, the one end of stay cord with reel fixed connection, and convolute on the reel, the other end of stay cord is used for connecting with the davit, length sensor with the reel sets up relatively, is used for responding to the reel rotates the number of turns, the controller respectively with length sensor with alarm component electricity is connected, is used for according to receiving length sensor's sensing signal control alarm component's warning response. The risk that the pull rope is accidentally torn off can be reduced, and the operation risk is further reduced.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a rope breakage prevention early warning device, a control method thereof and a crane.
Background
The construction environment of the engineering machinery is severe, the operation condition is complex, and the requirement on the reliability of a heavy part is very high. The length sensor is used as one of the heavy parts of the crane, is used for detecting the telescopic length of the crane boom and has high reliability.
In the prior art, the working principle of the crane jib length detection sensor is as follows: when the crane boom extends, the pull rope of the length sensor is driven to stretch, so that the winding drum is driven to rotate, and the spring in the winding drum is screwed up. When the suspension arm retracts, the pull rope is driven to retract into the winding drum, and the elastic potential energy accumulated by the spring is released. The Hall sensing element in the length sensor can output an electric signal to the controller according to the elastic deformation of the spring, convert the electric signal into a corresponding length value and feed back the length value to the display screen interface.
However, in a complex construction environment, if an overlong pull rope is hung by an external obstacle and the length sensor does not feed back an early warning signal, the subsequent action may cause the risk of hanging the pull rope, or cause the performance of the pull rope to be damaged, and cause the spring to deform irreversibly, so that the length sensor is damaged, and the operation risk is increased.
Disclosure of Invention
The invention aims to provide a rope breakage prevention early warning device, a control method thereof and a crane, which can reduce the risk of accidental breakage of a pull rope and further reduce the operation risk.
The embodiment of the invention is realized by the following steps:
in one aspect of the embodiment of the invention, the rope breakage prevention early warning device comprises a controller, a length sensor, a winding drum, a pull rope and an alarm component, wherein one end of the pull rope is fixedly connected with the winding drum and wound on the winding drum, the other end of the pull rope is used for being connected with a suspension arm, the length sensor and the winding drum are arranged oppositely and used for sensing the rotation number of turns of the winding drum, and the controller is respectively electrically connected with the length sensor and the alarm component and used for controlling the alarm response of the alarm component according to received sensing signals of the length sensor.
Optionally, the sensing element of the length sensor is a hall element, one end of the winding drum is provided with a magnet, the magnet has a preset distance from the rotation center of the winding drum, and the hall element and the magnet can mutually sense.
Optionally, the sensing element of the length sensor is a potentiometer, the potentiometer includes a potentiometer rotating shaft, and the potentiometer rotating shaft is fixedly connected to the rotating center of the winding drum and is used for converting the mechanical rotation of the winding drum into an electrical signal.
Optionally, the sensing element of the length sensor is a proximity switch, one end of the winding drum is provided with a plurality of protrusions, and the proximity switch corresponds to the protrusions.
Optionally, the sensing element of the length sensor is a high-speed proximity switch, a plurality of sensing teeth are uniformly distributed on the circumference of one end of the winding drum, the number of the high-speed proximity switch is the same as that of the sensing teeth, and the sensing teeth are concentrically and uniformly distributed along the outer ring of the sensing teeth.
Optionally, the alarm component includes a display screen and/or a buzzer, and the display screen and the buzzer are electrically connected to the controller respectively.
In another aspect of the embodiments of the present invention, a control method for a rope breakage prevention early warning device is provided, including: acquiring the normal rotating speed of a winding drum; receiving an induction signal of a length sensor, and obtaining the actual rotating speed of the winding drum according to the induction signal; and comparing the actual rotating speed with the normal rotating speed, and controlling an alarm component to give an alarm when the actual rotating speed is greater than the normal rotating speed.
Optionally, the receiving a sensing signal of a length sensor and determining an actual rotation speed of the winding drum according to the sensing signal includes: and converting the induction signal into a time cycle waveform, comparing the cycle waveform with the reference waveform of the normal rotating speed, and determining the variation of the waveform in each cycle.
Optionally, the alarm component includes a display screen and a buzzer, which are electrically connected to the controller, respectively, and the controlling the alarm component to respond to the alarm includes: and controlling a display screen to display the early warning information and controlling the buzzer to buzz.
In another aspect of the embodiments of the present invention, there is provided a crane, including the rope breakage prevention early warning device as described in any one of the above.
The embodiment of the invention has the beneficial effects that:
according to the anti-rope-breakage early warning device and the control method thereof as well as the crane, one end of the pull rope is fixedly connected with the winding drum and wound on the winding drum, and the other end of the pull rope is connected with the suspension arm, so that the pull rope and the suspension arm are driven to synchronously act when the suspension arm stretches. Through the length sensor who sets up with the reel relatively, when stay cord and davit synchronization action, drive the reel and rotate, can respond to the rotation state of reel through the length sensor who is connected with the controller electricity, according to the parameter information of time of predetermineeing to in confirm the operating condition of stay cord, when the sensing signal that length sensor detected is outside the threshold value of signal of predetermineeing, controller control alarm component warning response can reduce the unexpected risk of tearing apart of stay cord, and then reduce the operation risk.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a hall element and a reel according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a potentiometer and a spool according to an embodiment of the present invention;
FIG. 3 is a schematic view of a proximity switch and a spool according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a high-speed proximity switch and a spool according to an embodiment of the present invention;
FIG. 5 illustrates an embodiment of the present invention.
Icon: 110-a reel; 112-a magnet; 114-a bump; 116-sensing teeth; 120-Hall element; 130-a potentiometer; 132-a potentiometer shaft; 140-a proximity switch; 150-high speed proximity switch.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements that are referred to 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.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the embodiment provides an anti-rope-breakage early warning device, which includes a controller, a length sensor, a winding drum 110, a pulling rope and a warning component, wherein one end of the pulling rope is fixedly connected to the winding drum 110 and is wound on the winding drum 110, the other end of the pulling rope is used for being connected to a boom, the length sensor and the winding drum 110 are arranged oppositely and are used for sensing the number of turns of the winding drum 110, and the controller is electrically connected to the length sensor and the warning component respectively and is used for controlling the warning response of the warning component according to the received sensing signal of the length sensor.
First, the length sensor itself does not have a function of detecting the stretching amount and the stretching speed of the rope, and in the embodiment of the present invention, the stretching speed of the boom of the crane is controlled by the oil cylinder to stretch and contract is used as a reference value, and the rotation amount of the drum 110 is determined by the diameter of the drum 110 and the stretching speed of the stretching arm. In order to avoid the problem of false alarm due to the fact that the cord has a certain overlap in the spool 110, the diameter of the wound cord can be determined as the diameter of the spool 110.
Secondly, the reference value that reel 110 normally rotated is prefabricated in the controller, and preset signal promptly, and during the in-service use, length sensor can acquire the rotation state of reel 110 to transmit sensing signal to the controller, the controller compares through sensing signal's threshold value, controls the warning response of warning subassembly, in order to remind relevant staff in time to make corresponding reaction.
According to the rope breakage prevention early warning device provided by the embodiment of the invention, one end of the pull rope is fixedly connected with the winding drum 110 and wound on the winding drum 110, and the other end of the pull rope is connected with the suspension arm, so that when the suspension arm stretches, the pull rope and the suspension arm are driven to synchronously act. Through the length sensor who sets up with reel 110 relatively, when stay cord and davit synchronization action, drive reel 110 and rotate, length sensor through being connected with the controller electricity can respond to reel 110's rotation state, according to the parameter information of preset time, so that confirm the operating condition of stay cord, when the sensing signal that length sensor detected is outside the threshold value of preset signal, controller control warning subassembly warning response, can reduce the unexpected risk of tearing apart of stay cord, and then reduce the operation risk.
Alternatively, as shown in fig. 1, the sensing element of the length sensor is a hall element 120, one end of the winding drum 110 is provided with a magnet 112, the magnet 112 has a preset distance from the rotation center of the winding drum 110, and the hall element 120 and the magnet 112 can mutually sense.
Specifically, when the spool 110 rotates in the forward or reverse direction once, the magnet 112 and the hall element 120 are aligned with each other, the hall element 120 will output a sawtooth waveform induced voltage, and when the voltage is from the lowest to the highest, it indicates that the spool 110 has rotated one revolution. The controller collects the sensing signal output by the hall element 120, and the controller judges whether the working state of the pull rope is normal or not through the threshold comparison of the sensing signal.
It should be noted that, in the embodiment of the present invention, the number of the magnets 112 is not particularly limited, as long as the required normal output of the sensing signal can be satisfied. For example, in order to improve the sensing accuracy, the magnets 112 may be symmetrically arranged in two along the rotation center of the winding drum 110, so as to ensure that a consistent and complete sensing signal can be obtained every half rotation of the winding drum 110, thereby improving the timeliness of the sensing signal.
Alternatively, as shown in fig. 2, the sensing element of the length sensor is a potentiometer 130, and the potentiometer 130 includes a potentiometer rotating shaft 132, and the potentiometer rotating shaft 132 is fixedly connected to the rotating center of the winding drum 110 for converting the mechanical rotation of the winding drum 110 into an electrical signal.
Specifically, when the potentiometer rotating shaft 132 rotates along with the winding drum 110, the voltage at the output end of the potentiometer 130 changes along with the change of the rotating position of the winding drum 110, so that the mechanical rotation of the winding drum 110 is converted into an electrical signal. Every time the winding drum 110 rotates a circle, the potentiometer 130 outputs a linear voltage waveform, similarly, the controller collects sensing signals output by the potentiometer 130, and the controller judges whether the working state of the pull rope is normal or not through threshold comparison of the sensing signals.
Alternatively, as shown in fig. 3, the sensing element of the length sensor is a proximity switch 140, one end of the winding drum 110 is provided with a plurality of protrusions 114, and the proximity switch 140 corresponds to the protrusions 114.
Specifically, when the spool 110 rotates in either forward or reverse direction, the protrusion 114 and the proximity switch 140 are aligned once, and the proximity switch 140 outputs a sensing signal in one cycle. The controller collects the sensing signal output by the proximity switch 140, and the controller judges whether the working state of the pull rope is normal or not through threshold comparison of the sensing signal.
Alternatively, as shown in fig. 4, the sensing element of the length sensor is a high-speed proximity switch 150, a plurality of sensing teeth 116 are uniformly distributed on the circumference of one end of the winding drum 110, the number of the high-speed proximity switches 150 is the same as the number of the sensing teeth 116 (the number of the high-speed proximity switches 150 is not completely shown in fig. 4), and the sensing teeth 116 are concentrically and uniformly distributed along the outer ring of the sensing teeth 116.
Specifically, when each sensing tooth 116 corresponds to the high-speed proximity switch 150, the high-speed proximity switch 150 outputs a pulse waveform signal, i.e., a required sensing signal, the controller collects the sensing signal output by the high-speed proximity switch 150, and the controller determines whether the working state of the pull rope is normal or not by comparing the threshold values of the sensing signals.
Optionally, the alarm component comprises a display screen and/or a buzzer, and the display screen and the buzzer are respectively electrically connected with the controller.
Specifically, the warning subassembly can include the display screen, and when the early warning of controller control display screen, the display screen can carry out the popup window and remind, prevents that operating personnel from not in time discovering the problem and causing the stay cord to tear apart. The warning assembly can also comprise a buzzer, when the controller controls the buzzer to give an early warning, the buzzer can give a buzzing response, the timely reminding effect is achieved, and the pull rope is prevented from being pulled apart due to the fact that an operator does not find a problem timely. Similarly, the alarm component can also comprise a display screen and a buzzer at the same time, so that multipath reminding is ensured, normal transmission in the reminding process is ensured, and the probability of misoperation is reduced.
As shown in fig. 5, an embodiment of the present invention further provides a control method of a rope breakage prevention early warning device, including:
and S100, acquiring the normal rotating speed of the winding drum 110.
Specifically, the normal rotation speed of the drum 110 can be obtained by testing the limit speed of the boom extending out or retracting back when the boom is controlled to extend or retract by the oil cylinder according to the extending or retracting state of the boom, and since the extending or retracting of the boom is synchronous with the forward and reverse rotation of the drum 110, the limit speed of the boom extending or retracting back is also the limit speed of the normal rotation of the drum 110. This speed serves as the normal rotational speed of the spool 110.
S200, receiving the sensing signal of the length sensor, and obtaining the actual rotating speed of the winding drum 110 according to the sensing signal.
Specifically, in the actual working process of the crane, the length sensor outputs a corresponding sensing signal according to the working state of the winding drum 110, and the controller can learn the actual rotating speed of the winding drum 110 according to the variation condition of the sensing signal in a certain period through the sensing signal.
And S300, comparing the actual rotating speed with the normal rotating speed, and controlling an alarm component to give an alarm when the actual rotating speed is greater than the normal rotating speed.
Specifically, the periodic sensing signals of each rotation of the drum 110 may be compared, and a difference between the actual rotation speed and the normal rotation speed may be determined in time, and when the actual rotation speed is greater than a preset threshold interval of the normal rotation speed, the alarm assembly is controlled to perform an alarm response to remind an operator to stop extending the boom or retracting the boom, so as to prevent the pull rope from being torn off by an obstacle.
Alternatively, receiving the sensing signal of the length sensor and determining the actual rotation speed of the roll 110 according to the sensing signal comprises: and converting the induction signal into a time period waveform, comparing the period waveform with a reference waveform of a normal rotating speed, and determining the variation of the waveform in each period.
Specifically, when an operator operates, the control interface can display a reference waveform in a normal state and a real-time waveform actually operated by the operator, and the extension or retraction speed of the suspension arm is better controlled by the operator according to the comparison of the waveforms, so that the work efficiency is improved. Meanwhile, the controller also compares the data, and displays the data in a simple and visual mode at the same time of comparison, so that the controller has a certain reference value for operators.
Optionally, the alarm component includes a display screen and a buzzer, which are electrically connected to the controller, respectively, and the controlling of the alarm component to respond to the alarm includes: and controlling the display screen to display the early warning information and controlling the buzzer to buzz.
Specifically, the controller determines the rotation speed of the winding drum 110 according to the received sensing signal, and if the rotation speed is out of a set threshold value, the controller controls the alarm component to give an alarm response. In the example, the display screen popup window carries out interface early warning and the like, and then the sound of the buzzer is combined to remind an operator to pay attention, so that the pull rope is prevented from being pulled apart.
The embodiment of the invention also discloses a crane, which comprises the rope breakage prevention early warning device in the embodiment. The crane comprises the same structure and beneficial effects as the rope breakage preventing early warning device in the embodiment. The structure and the beneficial effects of the rope breakage prevention early warning device have been described in detail in the foregoing embodiments, and are not described herein again.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a prevent disconnected rope early warning device, its characterized in that, includes controller, length sensor, reel, stay cord and alarm component, the one end of stay cord with reel fixed connection, and convolute on the reel, the other end of stay cord is used for being connected with the davit, length sensor with the reel sets up relatively, is used for responding to the reel turns, the controller respectively with length sensor with alarm component electricity is connected, is used for according to receiving length sensor's sensing signal control alarm component's warning response.
2. The rope breakage preventing early warning device according to claim 1, wherein the sensing element of the length sensor is a hall-type element, a magnet is arranged at one end of the winding drum, a preset distance is formed between the magnet and a rotation center of the winding drum, and the hall-type element can mutually sense with the magnet.
3. The rope breakage preventing early warning device according to claim 1, wherein the sensing element of the length sensor is a potentiometer, and the potentiometer comprises a potentiometer rotating shaft which is fixedly connected with a rotating center of the winding drum and is used for converting mechanical rotation of the winding drum into an electric signal.
4. The rope breakage preventing early warning device according to claim 1, wherein the sensing element of the length sensor is a proximity switch, one end of the winding drum is provided with a plurality of protrusions, and the proximity switch corresponds to the protrusions.
5. The rope breakage preventing early warning device as claimed in claim 1, wherein the sensing element of the length sensor is a high-speed proximity switch, a plurality of sensing teeth are uniformly distributed on the circumference of one end of the winding drum, the number of the high-speed proximity switch is the same as that of the sensing teeth, and the sensing teeth are concentrically and uniformly distributed along the outer ring of the sensing teeth.
6. The rope breakage preventing early warning device as claimed in any one of claims 1 to 5, wherein the warning component comprises a display screen and/or a buzzer, and the display screen and the buzzer are electrically connected with the controller respectively.
7. A control method of a rope breakage prevention early warning device is characterized by comprising the following steps:
acquiring the normal rotating speed of a winding drum;
receiving an induction signal of a length sensor, and obtaining the actual rotating speed of the winding drum according to the induction signal;
and comparing the actual rotating speed with the normal rotating speed, and controlling an alarm component to give an alarm when the actual rotating speed is greater than the normal rotating speed.
8. The control method of the rope breakage preventing early warning device according to claim 7, wherein the receiving of the sensing signal of the length sensor and the determining of the actual rotation speed of the winding drum according to the sensing signal comprises:
and converting the induction signal into a time cycle waveform, comparing the cycle waveform with the reference waveform of the normal rotating speed, and determining the variation of the waveform in each cycle.
9. The control method of the rope breakage preventing early warning device according to claim 7, wherein the alarm component comprises a display screen and a buzzer which are respectively electrically connected with the controller, and the controlling of the alarm component to give an alarm comprises:
and controlling a display screen to display the early warning information and controlling the buzzer to buzz.
10. A crane, characterized by comprising the rope breakage prevention early warning device as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911063498.5A CN110775827A (en) | 2019-10-31 | 2019-10-31 | Rope breakage prevention early warning device, control method thereof and crane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911063498.5A CN110775827A (en) | 2019-10-31 | 2019-10-31 | Rope breakage prevention early warning device, control method thereof and crane |
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| CN201911063498.5A Pending CN110775827A (en) | 2019-10-31 | 2019-10-31 | Rope breakage prevention early warning device, control method thereof and crane |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010076848A (en) * | 2008-09-24 | 2010-04-08 | Panasonic Electric Works Co Ltd | Lifting device |
| CN102030279A (en) * | 2010-12-31 | 2011-04-27 | 徐州重型机械有限公司 | Crane and anti-over-discharging protection device of hoisting rope thereof |
| CN204649766U (en) * | 2015-06-15 | 2015-09-16 | 金华诺王液压控制科技有限公司 | A kind of capstan winch parameter measuring apparatus |
| CN204980992U (en) * | 2015-09-06 | 2016-01-20 | 中国地质大学（武汉） | Fast automatic control device of winch wire rope |
| CN108975192A (en) * | 2018-09-28 | 2018-12-11 | 中国人民解放军火箭军工程大学 | A kind of double-brake electric hoist failure emergency load safe release system and method |
-
2019
- 2019-10-31 CN CN201911063498.5A patent/CN110775827A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010076848A (en) * | 2008-09-24 | 2010-04-08 | Panasonic Electric Works Co Ltd | Lifting device |
| CN102030279A (en) * | 2010-12-31 | 2011-04-27 | 徐州重型机械有限公司 | Crane and anti-over-discharging protection device of hoisting rope thereof |
| CN204649766U (en) * | 2015-06-15 | 2015-09-16 | 金华诺王液压控制科技有限公司 | A kind of capstan winch parameter measuring apparatus |
| CN204980992U (en) * | 2015-09-06 | 2016-01-20 | 中国地质大学（武汉） | Fast automatic control device of winch wire rope |
| CN108975192A (en) * | 2018-09-28 | 2018-12-11 | 中国人民解放军火箭军工程大学 | A kind of double-brake electric hoist failure emergency load safe release system and method |
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Application publication date: 20200211 |
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