CN113336111A - Protective fusing device and method for steel wire rope of automobile crawler crane under overload tension - Google Patents
Protective fusing device and method for steel wire rope of automobile crawler crane under overload tension Download PDFInfo
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- CN113336111A CN113336111A CN202110588316.7A CN202110588316A CN113336111A CN 113336111 A CN113336111 A CN 113336111A CN 202110588316 A CN202110588316 A CN 202110588316A CN 113336111 A CN113336111 A CN 113336111A
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- Prior art keywords
- force
- steel wire
- wire rope
- connecting device
- crawler crane
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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
- 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
- B66C23/90—Devices for indicating or limiting lifting moment
- B66C23/905—Devices for indicating or limiting lifting moment electrical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention discloses a protective fusing device for a steel wire rope of an automobile crawler crane under overload tension, which comprises a connecting device, a force-sensitive resistance surface and a portable power supply device, wherein the connecting device is connected with the force-sensitive resistance surface; the connecting device is used for connecting a sling of the crane and is controlled by the current to be fused; the force-sensitive resistance surface is arranged at the joint of the connecting device and the sling; the portable power supply device is mounted on the connecting device. When the pressure value is too large, the current changes along with the change of the current, the electromagnet connecting device controlled by the current is powered off immediately, and the lifting hook sling is separated from the crane immediately to play a role in fusing early warning. The steel wire rope is prevented from being broken due to overweight, and casualties possibly caused by untimely early warning due to overload carrying are prevented.
Description
Technical Field
The invention belongs to the technical field of civil engineering construction safety, and particularly relates to a protective fusing device and method for a steel wire rope of an automobile crawler crane under an overload tension.
Background
The magnetism of the magnet can be controlled by switching on or off the current; the magnetic strength can be controlled by the strength of current or the number of turns of the coil; the magnetic size can also be controlled by changing the resistance to control the current size; its magnetic poles may be controlled by changing the direction of the current, etc. Namely: the strength of magnetism can be changed, the existence of magnetism can be controlled, the direction of a magnetic pole can be changed, and the magnetism can disappear due to the disappearance of current.
At present, the common electromagnets in the market are mostly regarded as a crane main body, and the hoisting process in the operation process is carried out by utilizing the current magnetic effect. Most of the existing electromagnets can only be hoisted by rated weight and cannot be flexibly adjusted according to specific construction requirements. The resistance value adjusting device is additionally arranged, so that the hoisting operation is diversified, multiple quota hoisting can be performed, and different operation requirements can be met.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a protective fusing device and a protective fusing method for a steel wire rope of an automobile crawler crane under overload tension, which are simple to operate and can perform early warning on overweight operation.
The technical scheme is as follows: the invention relates to a protective fusing device for a steel wire rope of an automobile crawler crane under overload tension, which comprises a connecting device, a force-sensitive resistance surface and a portable power supply device, wherein the force-sensitive resistance surface is arranged on the connecting device; the connecting device is used for connecting a sling of the crane and is controlled by the current to be fused; the force-sensitive resistance surface is arranged at the joint of the connecting device and the sling; the portable power supply device is mounted on the connecting device.
Further, the portable power supply device comprises a battery pack, a resistance value regulator, a fixed value resistor and a switch; the resistance value regulator and the fixed value resistor are arranged below the inner part of the plastic shell; the battery pack is arranged above the inner part of the plastic shell and forms a portable power supply device together with a switch arranged outside the plastic shell.
Furthermore, the connecting device is an electromagnet fusing device, and whether the connecting device has magnetism or not is determined according to the current regulated and controlled by the force sensitive resistor, so that the fusing is controlled.
Furthermore, the force-sensitive resistor surface is arranged on the inner side of the electromagnet fusing device and is fully contacted with the sling, so that the weight borne by the sling can be accurately monitored in real time.
Furthermore, the force sensitive resistor surface is semicircular and is arranged at the inner side of the fusing device of the electromagnet, so that the movement range of a sling which is possibly generated due to the change of a lifted heavy object and the sling is basically covered, and the reliability of the detection system is ensured.
Furthermore, an ohmmeter is arranged on the side surface of the force-sensitive resistor, so that the recording can be observed conveniently in time.
Furthermore, the portable power supply device is arranged outside the electromagnet fusing device, so that the continuous input of power can be kept, and the completeness and continuity of the detection effect are ensured.
The invention discloses a method for a protective fusing device of a steel wire rope of an automobile crawler crane under overload tension, which comprises the following steps:
(1) when the hoisting is started, the force-sensitive resistance surface contacts with the lifting hook, and the sling starts to transfer the weight of the hoisted object to the force-sensitive resistance surface;
(2) the force sensitive resistor changes the resistance value thereof according to the strength;
(3) the method is characterized in that the method is obtained by using the ohm law I as U/R, when the voltage U is unchanged, the current in a circuit changes due to the change of the resistance value, the single maximum hoisting weight is determined according to the type of a crane used for construction, and the resistance value of a fixed resistor is arranged in the device so as to adjust the input current value;
(4) when the current is not enough to supply the electromagnet for normal operation, the magnetism of the coil and the soft iron rod disappears, and the connecting device is disconnected, so that the effect of reminding workers that the crane belongs to overload work at the moment is achieved.
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the invention focuses on the comprehensive application of electricity and magnetism, namely, the strength of magnetic force is determined by the magnitude of current. Thereby, the early warning function of overweight operation is realized. The steel wire rope overload early warning device is simple in structure and clear in flow, has a good prevention early warning effect on various accidents possibly caused by overweight operation, prevents the steel wire rope from being broken due to overweight, and simultaneously prevents casualties possibly caused by untimely early warning due to overload carrying.
Drawings
FIG. 1 is a schematic flow chart of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is an enlarged view of a fuse device of the present invention;
FIG. 4 is a circuit diagram of a fuse device according to the present invention.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
As shown in fig. 2 and 3, the protective fusing device for steel wire rope comprises: the device comprises an electromagnet crane sling connecting device controlled by current I, a force sensitive resistance surface and a portable power supply device. The connecting device is used for connecting a sling of a crane; the force-sensitive resistance surface is arranged on the inner surface of the connecting device, which is in contact with the sling; the portable power supply device is arranged at the connecting device, so that the whole device can be ensured to normally operate.
The invention controls the integrity of the whole structure of the lifting hook through the current I, controls the current in the whole system through the force-sensitive resistor, and arranges the force-sensitive resistor at a proper position so as to ensure the reliability of monitoring.
When the lifting hook starts to work, the crane drives the lifting hook to lift up to be in contact with the force-sensitive resistor surface, and the force-sensitive resistor converts the pressure F into the resistance omega, so that the current I in a circuit is changed, and whether the structural integrity of the lifting hook formed by the electromagnet can be guaranteed or not is determined.
Preferably, an ohmmeter can be additionally arranged near the force-sensitive resistor, so that the recording can be observed and recorded conveniently in time
The force-sensitive resistor is arranged at the connecting surface of the lifting hook of the sling, so that the monitoring effect is prevented from being subjected to error due to movement of the sling.
Preferably, the force-sensitive resistor surface can be directly additionally arranged in the lifting hook according to different connection modes, so that the detection result is more accurate.
The lifting hook is composed of two parts: the power supply device and the force-sensitive resistance surface are connected in parallel to a circuit, so that the current I can directly control whether the lifting hook works.
Preferably, the force sensitive resistive surface provides a plurality of alternative weight gears, thereby realizing the lifting operation of objects with different weights.
As shown in fig. 4, the resistance regulator and the fixed resistor are installed below the inside of the plastic shell; the battery pack is arranged above the inner part of the plastic shell and forms a portable power supply device together with a switch arranged outside the plastic shell.
More specifically, as shown in fig. 1, the system comprises the following steps:
1) the sling is connected with the lifting hook, and the force sensitive resistance surface on the lifting hook begins to convert the gravity into a resistance value
2) The electric current size changes along with the resistance value changes, and when the electric current size still can normally supply the electro-magnet during operation, the lifting hook can not separate:
3) when the current is not large enough to supply the electromagnet for working, the upper structure and the lower structure of the lifting hook are separated, and the hanging object is not formally lifted at the moment, so that the fusing early warning effect is realized.
Claims (8)
1. A protective fusing device for a steel wire rope of an automobile crawler crane under overload tension is characterized by comprising a connecting device (1), a force-sensitive resistance surface (3) and a portable power supply device (2); the connecting device (1) is used for connecting a sling of a crane and is controlled to be fused by the current; the force-sensitive resistance surface (3) is arranged at the joint of the connecting device (1) and the sling; the portable power supply device (2) is arranged on the connecting device (1).
2. The protective fusing device for the steel wire rope of the crawler crane of the automobile under the overload tension according to claim 1, wherein the portable power supply device (2) comprises a battery pack (4), a resistance value regulator (5), a fixed value resistor (6) and a switch (7); the resistance value regulator (5) and the fixed value resistor (6) are arranged below the inner part of the plastic shell; the battery pack (4) is arranged above the inner part of the plastic shell and forms a portable power supply device (2) together with a switch (7) arranged outside the plastic shell.
3. The protective fusing device for the steel wire rope of the crawler crane of the automobile under the overload tension as recited in claim 1, wherein the connecting device is an electromagnet fusing device.
4. The device of claim 3, wherein the force sensitive resistive surface is mounted inside the fusing device of the electromagnet and is in full contact with the cable.
5. The protective fusing device for the steel wire rope of the crawler crane of the automobile under the overload tension according to claim 1 or 4, wherein the force-sensitive resistance surface is semicircular.
6. The device for preventing the fuse from being blown out of the steel wire rope of the crawler crane of the automobile under the overload tension as claimed in claim 1 or 4, wherein an ohmmeter is arranged on the side surface of the force-sensitive resistor.
7. The protective fusing device for the steel wire rope of the crawler crane of the automobile under the overload tension as recited in claim 3, wherein the portable power supply device is arranged outside the fusing device of the electromagnet.
8. The method for the protective fusing device of the steel wire rope of the crawler crane of the automobile under the overload tension as recited in claim 1, which is characterized by comprising the following steps:
(1) when the hoisting is started, the force-sensitive resistance surface contacts with the lifting hook, and the sling starts to transfer the weight of the hoisted object to the force-sensitive resistance surface;
(2) the force sensitive resistor changes the resistance value thereof according to the strength;
(3) the method is characterized in that the method is obtained by using the ohm law I as U/R, when the voltage U is unchanged, the current in a circuit changes due to the change of the resistance value, the single maximum hoisting weight is determined according to the type of a crane used for construction, and the resistance value of a fixed resistor is arranged in the device so as to adjust the input current value;
(4) when the current is not enough to supply the electromagnet for normal operation, the magnetism of the coil and the soft iron rod disappears, and the connecting device is disconnected, so that the effect of reminding workers that the crane belongs to overload work at the moment is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110588316.7A CN113336111A (en) | 2021-05-28 | 2021-05-28 | Protective fusing device and method for steel wire rope of automobile crawler crane under overload tension |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110588316.7A CN113336111A (en) | 2021-05-28 | 2021-05-28 | Protective fusing device and method for steel wire rope of automobile crawler crane under overload tension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113336111A true CN113336111A (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110588316.7A Pending CN113336111A (en) | 2021-05-28 | 2021-05-28 | Protective fusing device and method for steel wire rope of automobile crawler crane under overload tension |
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| CN (1) | CN113336111A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10147492A (en) * | 1996-11-20 | 1998-06-02 | Komatsu Ltd | Control device and control method of starting-stopping of actuator |
| KR200230363Y1 (en) * | 2001-02-23 | 2001-07-19 | 신영기공(주) | Load and current detector for crane and truck |
| CN201031105Y (en) * | 2007-04-18 | 2008-03-05 | 倪桂龙 | Hoisting electromagnet self charging type controller |
| JP2008115008A (en) * | 2006-11-08 | 2008-05-22 | Hitachi Constr Mach Co Ltd | Fall prevention device of lifting magnet machine |
| CN201442790U (en) * | 2009-08-05 | 2010-04-28 | 抚顺市沃尔普机电设备有限公司 | Safety type multifunctional hoist electromagnet control device |
| CN204702420U (en) * | 2015-06-19 | 2015-10-14 | 武汉钢铁(集团)公司 | A kind of anti-steel rope breaking device |
-
2021
- 2021-05-28 CN CN202110588316.7A patent/CN113336111A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10147492A (en) * | 1996-11-20 | 1998-06-02 | Komatsu Ltd | Control device and control method of starting-stopping of actuator |
| KR200230363Y1 (en) * | 2001-02-23 | 2001-07-19 | 신영기공(주) | Load and current detector for crane and truck |
| JP2008115008A (en) * | 2006-11-08 | 2008-05-22 | Hitachi Constr Mach Co Ltd | Fall prevention device of lifting magnet machine |
| CN201031105Y (en) * | 2007-04-18 | 2008-03-05 | 倪桂龙 | Hoisting electromagnet self charging type controller |
| CN201442790U (en) * | 2009-08-05 | 2010-04-28 | 抚顺市沃尔普机电设备有限公司 | Safety type multifunctional hoist electromagnet control device |
| CN204702420U (en) * | 2015-06-19 | 2015-10-14 | 武汉钢铁(集团)公司 | A kind of anti-steel rope breaking device |
Non-Patent Citations (1)
| Title |
|---|
| 天津大学无线电材料与元件教研室: "《电阻器》", 技术标准出版社, pages: 421 - 426 * |
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