CN111392628A - Electric crane weighing method and system - Google Patents
Electric crane weighing method and system Download PDFInfo
- Publication number
- CN111392628A CN111392628A CN202010308353.3A CN202010308353A CN111392628A CN 111392628 A CN111392628 A CN 111392628A CN 202010308353 A CN202010308353 A CN 202010308353A CN 111392628 A CN111392628 A CN 111392628A
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- China
- Prior art keywords
- wire rope
- winch
- steel wire
- tension
- weight
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
- B66D1/58—Safety gear responsive to excess of load
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/02—Driving gear
- B66D1/12—Driving gear incorporating electric motors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/14—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The application discloses a method and a system for weighing an electric crane. The method for weighing the electric crane comprises the following steps: and acquiring the tension of a steel wire rope of the winch, and acquiring the hoisting weight of the lifting hook according to the tension of the steel wire rope of the winch. When lifting goods through lifting by crane the order of electronic gram, wire rope's pulling force turns into the weight of lifting by crane the goods, and then informs operating personnel, and the operating personnel of being convenient for looks over the weight of lifting by crane the goods, has reduced the possibility that the overweight goods were lifted by crane to electronic gram, has improved the security of electronic gram order and has lifted by crane, has prolonged the life of electronic gram order and has lifted by crane.
Description
Technical Field
The invention relates to the field of marine machinery, in particular to the field of marine electric cranes, and particularly relates to a method and a system for weighing an electric crane.
Background
The crane is a foreign word, and is also called as a marine crane and a marine crane, and is a large Deck machine on a ship, and is equipment for loading and unloading goods on the ship, and the hydraulic crane is loading and unloading equipment commonly used on the ship. The early crane is driven by a hydraulic system mostly, and the electric crane driven by a frequency conversion technology is the direction of recent development.
The weight of the lifted goods of the electric crane needs to be strictly controlled, the electric crane is damaged due to overweight, and an operator cannot know the weight of the lifted goods because the conventional crane does not have a corresponding weighing system.
Disclosure of Invention
In view of the above-mentioned deficiencies or inadequacies of the prior art, it would be desirable to provide an electric hoist weighing method and system that informs an operator of the weight of the load being hoisted.
In a first aspect, the invention provides a method for weighing an electric crane, comprising the following steps:
the tension of the steel wire rope of the winch is obtained,
and acquiring the hoisting weight of the lifting hook according to the tension of the steel wire rope of the winch.
In a second aspect, the invention provides an electric crane weighing system, comprising
A first obtaining module: is used for obtaining the tension of the steel wire rope of the winch,
a second obtaining module: and the hoisting weight of the lifting hook is obtained according to the tension of the steel wire rope of the winch.
According to the technical scheme that this application embodiment provided, through lifting by crane the goods with electronic gram, wire rope's pulling force turns into the weight of lifting by crane the goods, and then informs operating personnel, and the operating personnel of being convenient for look over the weight of lifting by crane the goods, has reduced the possibility that electronic gram lifted by crane the overweight goods, has improved the security of electronic gram by crane, has prolonged the life of electronic gram by crane.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic flow chart of a method for weighing an electric crane according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an electric crane weighing system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electric crane weighing system according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
One embodiment of the present invention is a method for weighing an electric crane, referring to fig. 1, which is characterized by comprising the following steps:
the tension of the steel wire rope of the winch is obtained,
and acquiring the hoisting weight of the lifting hook according to the tension of the steel wire rope of the winch.
In the embodiment of the invention, in the using process of the electric crane, the motor drives the winch drum to rotate through the speed reducer, the winch drum is wound with the steel wire rope, and the winch drum rotates to receive and release the steel wire rope. Specifically, the steel wire rope is connected with a lifting hook through a pulley block, the lifting hook is used for lifting goods, and in the process that the goods are lifted by the lifting hook, the steel wire rope tension of the winch is obtained through detecting the output torque of the motor. Through hoist engine wire rope pulling force, obtain the lifting weight of lifting hook, that is to say the weight that the goods was hoisted to the lifting hook, can show lifting weight, the operating personnel of being convenient for looks over, has reduced the possibility that electronic gram was hoisted and was lifted overweight goods, has improved the security that electronic gram was hoisted, has prolonged the life of electronic gram.
Further, acquiring the tension of a steel wire rope of the winch according to the output torque of the motor, the reduction ratio of the speed reducer, the efficiency of the speed reducer, the bottom diameter of a roller of the winch, the efficiency of a winding drum and the diameter of the steel wire rope;
tension of steel wire rope of winch
T is motor output torque, i is speed reducer reduction ratio, η1For speed reducer efficiency, η2For the drum efficiency, D is the bottom diameter of the winch drum, and D is the diameter of the steel wire rope.
In the embodiment of the invention, the tension of the steel wire rope of the winch is obtained according to the output torque of the motor, the reduction ratio of the speed reducer, the efficiency of the speed reducer, the bottom diameter of the roller of the winch, the efficiency of the winding drum and the diameter of the steel wire rope. Generally, when the lifting hook hoists the goods, motor output torque can change along with the weight of goods, and is the same, and hoist wire rope pulling force also can change along with the weight of fire dancing, obtains hoist wire rope pulling force according to motor output torque, and then obtains the weight that the goods was hoisted to the lifting hook, and easy operation is convenient for obtain the weight that the goods was hoisted to the lifting hook.
Further, acquiring the hoisting weight of the lifting hook according to the tension of the steel wire rope of the winch, comprising,
and converting the unit of the tension of the steel wire rope of the winch into ton, and acquiring the hoisting weight of the lifting hook according to the tension of the steel wire rope of the winch after the unit conversion.
In the embodiment of the invention, when the motor is used for outputting the torque to obtain the tension of the steel wire rope of the winch, the unit of the tension of the steel wire rope of the winch is kN, and kN needs to be converted into t, so that the subsequent treatment is convenient.
Further, acquiring the hoisting weight of the lifting hook according to the number of pulleys between the lifting hook and the motor, the unit-converted tension of a steel wire rope of the winch, the pulley efficiency of a single pulley and the weight of the lifting hook;
hook weight G ═ F × η3^n+F*η3^(n+1)-G′，
F is the hoist rope tension converted by unit η3For the pulley efficiency of a single pulley, n is the number of pulleys between the hook and the motor, and G' is the hook weight.
In another embodiment of the present invention, referring to FIG. 2, an electric crane weighing system includes
A first obtaining module: is used for obtaining the tension of the steel wire rope of the winch,
a second obtaining module: and the hoisting weight of the lifting hook is obtained according to the tension of the steel wire rope of the winch.
In the embodiment of the invention, in the using process of the electric crane, the motor drives the winch drum to rotate through the speed reducer, the winch drum is wound with the steel wire rope, and the winch drum rotates to receive and release the steel wire rope. Specifically, the steel wire rope is connected with a lifting hook through a pulley block, the lifting hook is used for lifting goods, and in the process that the goods are lifted by the lifting hook, the steel wire rope tension of the winch is obtained through detecting the output torque of the motor. Through hoist engine wire rope pulling force, obtain the lifting weight of lifting hook, that is to say the weight that the goods was hoisted to the lifting hook, can show lifting weight, the operating personnel of being convenient for looks over, has reduced the possibility that electronic gram was hoisted and was lifted overweight goods, has improved the security that electronic gram was hoisted, has prolonged the life of electronic gram.
Further, the first obtaining module: the device is used for acquiring the tension of the steel wire rope of the winch according to the output torque of the motor, the reduction ratio of the speed reducer, the efficiency of the speed reducer, the bottom diameter of the roller of the winch, the efficiency of the winding drum and the diameter of the steel wire rope;
tension of steel wire rope of winch
T is motor output torque, i is speed reducer reduction ratio, η1For speed reducer efficiency, η2For the drum efficiency, D is the bottom diameter of the winch drum, and D is the diameter of the steel wire rope.
In the embodiment of the invention, the tension of the steel wire rope of the winch is obtained according to the output torque of the motor, the reduction ratio of the speed reducer, the efficiency of the speed reducer, the bottom diameter of the roller of the winch, the efficiency of the winding drum and the diameter of the steel wire rope. Generally, when the lifting hook hoists the goods, motor output torque can change along with the weight of goods, and is the same, and hoist wire rope pulling force also can change along with the weight of fire dancing, obtains hoist wire rope pulling force according to motor output torque, and then obtains the weight that the goods was hoisted to the lifting hook, and easy operation is convenient for obtain the weight that the goods was hoisted to the lifting hook.
Further, the second obtaining module: used for acquiring the hoisting weight of the lifting hook according to the tension of the steel wire rope of the winch, comprises,
and converting the unit of the tension of the steel wire rope of the winch into ton, and acquiring the hoisting weight of the lifting hook according to the tension of the steel wire rope of the winch after the unit conversion.
In the embodiment of the invention, when the motor is used for outputting the torque to obtain the tension of the steel wire rope of the winch, the unit of the tension of the steel wire rope of the winch is kN, and kN needs to be converted into t, so that the subsequent treatment is convenient.
Further, the second obtaining module: the hoisting weight of the lifting hook is obtained according to the number of the pulleys between the lifting hook and the motor, the tension of a steel wire rope of the winch after unit conversion, the pulley efficiency of a single pulley and the weight of the lifting hook;
hook weight G ═ F × η3^n+F*η3^(n+1)-G′，
F is the hoist rope tension converted by unit η3For the pulley efficiency of a single pulley, n is the number of pulleys between the hook and the motor, and G' is the hook weight.
In an embodiment of the present invention, referring to fig. 3, a wire rope 20 is wound around a drum of a hoist 10, the wire rope 20 passes around a pulley block, a hook 40 is fixed to one of movable pulleys 30, and the hook 40 is used for lifting a cargo.
When the lifting hook lifts the goods, the tension of the steel wire rope of the winch
When the lifting hook lifts the cargo, the included angle between the steel wire rope and the vertical direction is small, and F2+ F3 is G-G', wherein F2 is F η 3 2, F3 is F η 3, namely G is F η for convenience of calculation3^n+F*η3And ^ (n +1) -G', wherein n is 2. The value of G obtained last is the weight of the lifted load and is given in t. A display device can be arranged in a cab of the crane and used for displaying the lifting weight of the lifting hook.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (8)
1. A method for weighing an electric crane is characterized by comprising the following steps:
the tension of the steel wire rope of the winch is obtained,
and acquiring the hoisting weight of the lifting hook according to the tension of the steel wire rope of the winch.
2. The method for weighing the electric crane according to claim 1, wherein the tension of the steel wire rope of the winch is obtained according to the output torque of the motor, the reduction ratio of the speed reducer, the efficiency of the speed reducer, the bottom diameter of the roller of the winch, the efficiency of the winding drum and the diameter of the steel wire rope;
the tension of the steel wire rope of the winch
T is the output torque of the motor,i is the reduction ratio of the reducer, η1For speed reducer efficiency, η2For the drum efficiency, D is the bottom diameter of the winch drum, and D is the diameter of the steel wire rope.
3. The method for weighing an electric crane according to claim 1, wherein the method for obtaining the hoisting weight of the hook based on the wire rope tension of the hoist comprises,
and converting the unit of the tension of the steel wire rope of the winch into ton, and acquiring the hoisting weight of the lifting hook according to the tension of the steel wire rope of the winch after the unit conversion.
4. The method for weighing the electric crane according to claim 3, wherein the hoisting weight of the hook is obtained according to the number of the pulleys between the hook and the motor, the unit-converted tension of the steel wire rope of the winch, the pulley efficiency of a single pulley and the weight of the hook;
the lifting weight G-F η of the lifting hook3^n+F*η3^(n+1)-G′，
F is the hoist cable tension converted by unit η3For the pulley efficiency of a single pulley, n is the number of pulleys between the hook and the motor, and G' is the hook weight.
5. An electric crane weighing system is characterized by comprising
A first obtaining module: is used for obtaining the tension of the steel wire rope of the winch,
a second obtaining module: and the hoisting weight of the lifting hook is obtained according to the tension of the steel wire rope of the winch.
6. The electric hoist weighing system of claim 5, wherein the first acquisition module: the device is used for acquiring the tension of the steel wire rope of the winch according to the output torque of the motor, the reduction ratio of the speed reducer, the efficiency of the speed reducer, the bottom diameter of a roller of the winch, the efficiency of a winding drum and the diameter of the steel wire rope;
the tension of the steel wire rope of the winch
T is motor output torque, i is speed reducer reduction ratio, η1For speed reducer efficiency, η2For the drum efficiency, D is the bottom diameter of the winch drum, and D is the diameter of the steel wire rope.
7. The electric hoist weighing system of claim 5, wherein the second acquisition module: used for obtaining the hoisting weight of the lifting hook according to the tension of the steel wire rope of the winch, comprises,
and converting the unit of the tension of the steel wire rope of the winch into ton, and acquiring the hoisting weight of the lifting hook according to the tension of the steel wire rope of the winch after the unit conversion.
8. The electric hoist weighing system of claim 7, wherein the second acquisition module: the hoisting weight of the lifting hook is obtained according to the number of the pulleys between the lifting hook and the motor, the unit-converted tension of the steel wire rope of the winch, the pulley efficiency of a single pulley and the weight of the lifting hook;
the lifting weight G-F η of the lifting hook3^n+F*η3^(n+1)-G′，
F is the hoist cable tension converted by unit η3For the pulley efficiency of a single pulley, n is the number of pulleys between the hook and the motor, and G' is the hook weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010308353.3A CN111392628A (en) | 2020-04-18 | 2020-04-18 | Electric crane weighing method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010308353.3A CN111392628A (en) | 2020-04-18 | 2020-04-18 | Electric crane weighing method and system |
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| CN111392628A true CN111392628A (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010308353.3A Pending CN111392628A (en) | 2020-04-18 | 2020-04-18 | Electric crane weighing method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654631A (en) * | 2021-07-30 | 2021-11-16 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Dual-container load measuring method, device, equipment and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3827514A (en) * | 1973-06-25 | 1974-08-06 | Weigh Tronix | Weight measuring hook block apparatus for cranes |
| CN101187582A (en) * | 2007-12-19 | 2008-05-28 | 太原重型机械集团有限公司 | Excavator bucket material weighing method |
| CN102889918A (en) * | 2012-10-11 | 2013-01-23 | 中钢集团衡阳重机有限公司 | Method for weighing electric excavator |
| CN203668736U (en) * | 2013-12-10 | 2014-06-25 | 山河智能装备股份有限公司 | Pretensioning hydraulic control loop of winding steel wire rope |
| CN204096942U (en) * | 2014-07-28 | 2015-01-14 | 巨力索具股份有限公司 | A kind of coaster with overload protection device of weighing |
| CN104401874A (en) * | 2014-10-11 | 2015-03-11 | 太原科技大学 | Assessment method of whole-course real-time service life of lifting steel wire rope of crane |
-
2020
- 2020-04-18 CN CN202010308353.3A patent/CN111392628A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3827514A (en) * | 1973-06-25 | 1974-08-06 | Weigh Tronix | Weight measuring hook block apparatus for cranes |
| CN101187582A (en) * | 2007-12-19 | 2008-05-28 | 太原重型机械集团有限公司 | Excavator bucket material weighing method |
| CN102889918A (en) * | 2012-10-11 | 2013-01-23 | 中钢集团衡阳重机有限公司 | Method for weighing electric excavator |
| CN203668736U (en) * | 2013-12-10 | 2014-06-25 | 山河智能装备股份有限公司 | Pretensioning hydraulic control loop of winding steel wire rope |
| CN204096942U (en) * | 2014-07-28 | 2015-01-14 | 巨力索具股份有限公司 | A kind of coaster with overload protection device of weighing |
| CN104401874A (en) * | 2014-10-11 | 2015-03-11 | 太原科技大学 | Assessment method of whole-course real-time service life of lifting steel wire rope of crane |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654631A (en) * | 2021-07-30 | 2021-11-16 | 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 | Dual-container load measuring method, device, equipment and storage medium |
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