CN111115460A - Prevent that ladle falls and alarm device - Google Patents

Prevent that ladle falls and alarm device Download PDF

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Publication number
CN111115460A
CN111115460A CN202010027738.2A CN202010027738A CN111115460A CN 111115460 A CN111115460 A CN 111115460A CN 202010027738 A CN202010027738 A CN 202010027738A CN 111115460 A CN111115460 A CN 111115460A
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CN
China
Prior art keywords
ladle
steel
lifting
carbon fiber
safety
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Pending
Application number
CN202010027738.2A
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Chinese (zh)
Inventor
张洋洋
秦义校
焦倩倩
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Taiyuan University of Science and Technology
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Taiyuan University of Science and Technology
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Publication date
Application filed by Taiyuan University of Science and Technology filed Critical Taiyuan University of Science and Technology
Priority to CN202010027738.2A priority Critical patent/CN111115460A/en
Publication of CN111115460A publication Critical patent/CN111115460A/en
Pending legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
    • B66C1/122—Sling or load protectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
    • B66C1/14—Slings with hooks
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)

Abstract

The invention relates to a device for preventing a steel ladle from falling and alarming, belonging to the field of safety and intellectualization of special heavy equipment; the device is characterized in that a carbon fiber rope pulley block is respectively suspended on a hanging beam outside two laminated lifting hooks of a ladle hanging beam to form a plurality of carbon fiber rope closed hanging rings which are uniformly stressed, two inverted light carbon fiber safety lifting hooks are arranged on a ladle extension trunnion, and a pin shaft between the two pulleys hooks the safety lifting hooks when the ladle lifts liquid metal so as to prevent the accident that the laminated lifting hooks are suddenly broken to cause the ladle to fall; a pressure trigger device is arranged between a shaft and a hole on a hanging beam of the suspension pulley block, and is used for carrying out stress alarm and wireless signal transmission to a data processing center of the casting crane, so that the intelligent maintenance prompt after the pouring is finished is realized; the device is convenient to operate when lifting and unloading the steel ladle, can prevent the steel ladle from falling by the device when the lifting hook is broken, completes the safety operation, and can give an alarm and intelligently maintain and prompt and record a fault lifting hook.

Description

Prevent that ladle falls and alarm device
Technical Field
The invention relates to a device for preventing a steel ladle from falling and alarming, which can alarm in advance through an alarm, can be applied to various casting cranes and has wide applicability.
Background
The gantry lifting appliance, the steel ladle, the pulley block and the like in the casting crane form part of a dumping device, a device with anti-falling and alarming functions is generally not provided in the traditional casting crane, the working environment temperature of the casting crane is high, the environment is relatively severe, so that the lifting hook is easy to damage or break, a falling accident is caused, and in reality, the breakage and damage of the lifting hook of the casting crane occur at all times, a device for breaking the lifting hook to cause the steel ladle to fall needs to be provided, so that the steel ladle can continue to finish the operation when the lifting hook breaks; meanwhile, an alarm device is added, workers are reminded of replacing the lifting hook in time through the alarm device, and the safety and reliability of the casting crane are improved.
The existing casting crane does not have a device for preventing a steel ladle from falling, and the reliability of a lifting hook is regularly detected according to the working time. The method can not prevent the steel ladle from falling, and once the lifting hook is broken, the steel ladle cannot be controlled, so that molten steel flows out.
The reasonable anti-falling device can ensure that the operation of the casting crane is safer, and the safety and the reliability of the crane are improved.
In summary, the conventional ladle crane does not include a protection device for preventing the ladle from falling due to the breakage of the hook, and therefore, the conventional ladle crane has a certain risk. The accident of molten steel splashing can be caused, so that great potential safety hazards are hidden when the crane is used and detected.
Disclosure of Invention
The invention aims to provide a steel ladle falling prevention and alarm device, which can enable a casting crane to normally complete work after a lifting hook is broken, and can trigger an alarm to remind that the lifting hook is replaced in time. Therefore, it is necessary to design a device for preventing the falling of the ladle and alarming.
In order to achieve the purpose, the scheme of the steel ladle falling prevention and alarm device is as follows.
A steel ladle falling prevention and alarm device comprises a steel upper pulley (4), a carbon fiber rope bundle (5), a steel lower pulley (6) and a pressure trigger device (7). Movable pulley blocks (1) are arranged on two sides of the upper end of the beam hanger (2) and fixed on the beam hanger (2) through pin shafts (3); two steel upper pulleys (4) are arranged on the lower side of the beam hanger (2) close to the outer side of the laminated lifting hook (16) through a fixing plate (14); the two steel lower pulleys (6) on the lower side are connected through a pin shaft (15); a pressure trigger device (7) is arranged between a shaft (18) on a hanging beam of the suspension pulley block and the hole; the pressure trigger device (7) analyzes the stress condition and transmits the data to the computer; the pressure trigger device (7) is connected with an alarm, and the alarm is arranged in the cross beam; the steel upper pulley (4) and the steel lower pulley (6) are arranged at an angle of 90 degrees and are connected in a single-layer winding manner through the carbon fiber rope (5), the two pulleys can be stressed in a balanced manner by the connection manner, the self weight and the whole outer diameter are greatly reduced by using the carbon fiber rope (5), the safety device is more energy-saving and environment-friendly, and the installation manners of the two sides are the same; a hoisting device (13) is arranged on the outer side of a ladle (9), the hoisting device is fixed through pin shafts (12) on two sides, a safety lifting hook (11) is inserted into the pin shaft (12), and a key is inserted into the pin shaft (12) and the safety lifting hook (11) to fix the lifting hook.
The specific data calculation is described by taking a 400T casting crane as an example.
Smax=P/（2×2×0.935）k N=4000/（2×2×0.935）=1069.51kN。
According to Fmin≥NSmaxTo calculate the minimum suitable diameter of the carbon fiber rope bundle (5).
Fmin≥NSmax=2.5×1069.51kN=2673.79 kN。
Wherein, FminMinimum breaking tension for the selected carbon fiber rope bundle (5); smaxThe maximum tension of the selected carbon fiber rope bundle (5); n is the safety coefficient of the system; since the safety device only needs to work once, N is selected to be 2.5; the efficiency of the pulley block is 0.935.
Fmin=D2σ/1000≥NSmax，The tensile strength of the carbon fiber rope bundle (5) is 3500 MPa; the minimum radius of the carbon fiber rope bundle (5) can be obtained to be 28 mm; the M3 condition is selected only once depending on the safety device.
Dmin=（ht-1) d = (16-1) × 28=420 mm. According to M3 operating condition htTaking 16, DminThe smallest diameter of the pulley.
And (4) calculating the safe laminated carbon fiber single hook (11) of the casting crane.
(1) Horizontal section of the hook body: the maximum tensile stress is superimposed on the stress in the inner side due to bending and uneven thermal deformation.
σPulling device=QMeterhLevel of/（FLevel ofKLevel ofD）+6QMeter（0.15δ-e）/hLevel ofδ≤[σ]=σs/5；KLevel of=（D+hLevel of）/2hLevel of×In（1+2hLevel of/D）-1=0.1131；hLevel of=450mm；FLevel of=900mm2；σPulling device=301.8MPa；[σ]=σs/5=600MPa；δ=200mm。
Wherein Q isMeterFor the calculated load (1/2 corresponding to the crane capacity) acting on the single safety hook (11); fLevel ofIs the area of the horizontal cross section; kLevel ofThe shape coefficient of a horizontal section and the shape coefficient of a rectangular section are adopted; delta is the thickness of the safety hook (11); h isLevel ofIs the height of the horizontal cross section; e is the width of the inclined plane at the upper end of the section.
(2) Cross section at 45 ° to vertical: in addition to the tensile stress, the shear stress should also be calculated.
σCombination of Chinese herbs=√（σPulling device 2+3τ2）≤[σ]=σs/5。
σPulling device=0.707QMeterh45°/F45°K45°D+0.707×6QMeter（0.5δ-e）/h45°δ2。
τ=（0.707QMeter/F45°）×1.5；K45°=（D+h45°）/2h45°×In（1+2h45°/D）-1=0.1131；h45°=400mm;F45°=800mm2;σCombination of Chinese herbs=248.97MPa。
Wherein, F45°Is the area of a 45-degree section; k45°The shape coefficient of a 45-degree section and the shape coefficient of a rectangular section; delta is the thickness of the safety hook (11)；h45°Is the height of a 45 degree section; e is the width of the inclined plane at the upper end of the section.
(3) Vertical section: the stress-strain-type steel is formed by superposing pure shear stress and torsional stress.
τCombination of Chinese herbs=τ1+τ2≤τs/5；τ1=（QMeter/FIs perpendicular to）×1.5；τ2=MTorsion bar/WTorsion bar。
MTorsion bar=QMeter（0.5δ-e）；WTorsion bar=KhIs perpendicular toδ2；hIs perpendicular to=300mm;FIs perpendicular to=600mm2；τCombination of Chinese herbs=59.6MPa;τs/5=69.282MPa。
K is a rectangular section torsion-resistant section conversion coefficient; fIs perpendicular toThe volume of one plate hook is V =50704cm in terms of the area of a vertical section3A total of 5 pieces, so that the total volume V of the plate hookGeneral assembly=253520cm3The unit weight of the carbon brazing sheet is 2g/cm3Therefore, one plate hook has a total weight of 500 kg. The safety lifting hook made of the carbon fiber material is light in weight, low in manufacturing cost, energy-saving and environment-friendly.
Drawings
Fig. 1 is a three-dimensional drawing of a ladle after the lifting appliance is dismounted, wherein (1) is a movable pulley, (2) is a beam lifting appliance, (3) is a pin shaft, (4) is a steel upper pulley, (5) is a carbon fiber rope bundle, (6) is a steel lower pulley, (7) is a pressure trigger device, (8) is a laminated lifting hook, (9) is a ladle body, (10) is a ladle supporting leg, (11) is a safety lifting hook, (12) is a pin shaft, (13) is a lifting device, (14) is a fixing plate, (15) is a pin shaft, (16) is a laminated lifting hook, (17) is a pin shaft, (18) is a shaft on a lifting beam of a suspension pulley block, (19) is an anticreep baffle, (20) is a fixing plate, and (21) is an anticreep baffle.
Fig. 2 is a three-dimensional diagram of a lifting ladle lifted by the lifting appliance, wherein (1) is a movable pulley, (2) is a beam lifting appliance, (3) is a pin shaft, (4) is a steel upper pulley, (5) is a carbon fiber rope bundle, (6) is a steel lower pulley, (7) is a pressure trigger device, (8) is a laminated lifting hook, (9) is a ladle body, (10) is a ladle supporting leg, (11) is a safety lifting hook, (12) is a pin shaft, (13) is a lifting device, (14) is a fixing plate, (15) is a pin shaft, (16) is a laminated lifting hook, (17) is a pin shaft, (18) is a shaft on a lifting beam of a suspension pulley block, (19) is an anti-shedding baffle, (20) is a fixing plate, and (21) is an anti-shedding baffle.
Fig. 3 is a front view of a ladle lifted by the lifting appliance, wherein (2) is a beam lifting appliance, (3) is a pin shaft, (6) is a steel lower pulley, (7) is a pressure trigger device, (8) is a laminated lifting hook, (11) is a safety lifting hook, (12) is a pin shaft, (14) is a fixing plate, (15) is a pin shaft, (17) is a pin shaft, and (18) is a shaft on a hanging beam of a suspension pulley block.
Fig. 4 is a side view of a lifting ladle of the lifting appliance, wherein (1) is a movable pulley, (5) is a carbon fiber rope bundle, (9) is a ladle body, (10) is a ladle supporting leg, (13) is a lifting device, and (16) is a laminated lifting hook.
Fig. 5 is a mounting diagram of the pressure trigger device, wherein (7) is the pressure trigger device, (14) is a fixing plate, and (18) is an axle on a hanging beam of a suspension pulley block.
Fig. 6 is a three-dimensional view of the lower run-out preventing device, in which (5) is a carbon fiber rope bundle, (20) is a fixing plate, and (21) is a run-out preventing fence.
Fig. 7 is a three-dimensional view of the upper anticreep groove device, wherein (14) is a fixed plate, (18) is a shaft on a hanging beam of a suspension pulley block, and (19) is an anticreep groove baffle.
Detailed Description
In order that the technical contents of the invention can be more clearly understood, the detailed description is given of specific embodiments. An embodiment of a device for preventing a steel ladle from falling and alarming.
A steel ladle falling prevention and alarm device comprises a steel upper pulley (4), a carbon fiber rope bundle (5), a steel lower pulley (6) and a pressure trigger device (7). When the casting crane is used for hoisting, the laminated lifting hook (16) and the installation protection devices (6) and (15) are synchronously hung on a pin shaft (17) and a safety lifting hook (11) of the hoisting device (13), the system has a safety protection device when the steel ladle (9) is hoisted for working, and the carbon fiber rope bundle (5) is in a loose state. When the laminated lifting hook (16) is broken and cannot work, the carbon fiber rope bundle (5) in the safety device is in a tight state, so that the operation is continued safely; the used carbon fiber rope bundle (5) is a steel wire rope made of the material, so that the dead weight of the safety device and the diameter of the steel wire rope are greatly reduced, the steel wire rope made of the material is high-temperature resistant, the service life is long under the condition of high-temperature work, and the energy consumption of the safety device during work is lowest; a pressure trigger device (7) is arranged between a shaft (18) and a hole on a hanging beam of a suspension pulley block, meanwhile, the pressure trigger device (7) is wirelessly transmitted to a computer for data analysis through pressure contact, the highest temperature of a steel ladle shell is 300 ℃, and the pressure trigger device is arranged on the outer side of the steel ladle and is not right opposite to molten steel, so that stress analysis can be completed by using the pressure trigger device. The pressure trigger device is wirelessly transmitted to the computer, when pressure is suddenly increased, an alarm is generated to remind a factory worker that the laminated lifting hook (16) loses working capacity, the factory worker needs to be replaced immediately after the operation is completed, and the alarm is arranged in the cross beam, so that the pressure trigger device (7) is in wired connection with the alarm, and the alarm effect can be achieved when the wireless transmission fails. The computer receives pressure data of different conditions at each time to form a database, an early warning capability is provided, data information interconnection analysis technologies such as the Internet of things, big data and cloud computing are integrated, information is expanded from local to regional scale, and distributed terminal information is integrated into the whole information database to realize interconnection and intercommunication. Simultaneously, safe lifting hook can be deviate from downwards to round pin axle (15) and lamination formula lifting hook (16) of safety device, and is convenient effective, and this device has increased a set of safety device again under the prerequisite that neither influences the ladle work of lifting by crane at ordinary times, and this set of safety device energy consumption is little, the simple operation and safe effective, has solved the major problem of foundry crane at the uncontrollable ladle of lifting hook fracture. Compared with the traditional casting crane, the casting crane has higher reliability and safety, and is simple to operate and easy to realize.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (3)

1. The utility model provides a prevent that ladle falls and alarm device, includes steel upper sheave group, carbon borer fiber rope bundle, steel lower sheave group, pressure warning and data wireless transmission trigger device, its characterized in that: the steel upper pulley and the steel lower pulley are connected in a single-layer winding mode through carbon fiber ropes, and the lifting hook has the advantages of being light in weight, small in size, high in strength and high in reliability, and the same in installation mode outside the two lifting hooks.
2. The steel ladle falling prevention and alarm device as claimed in claim 1, wherein: two inverted light carbon fiber safety laminated lifting hooks are arranged on the ladle extension trunnion.
3. The steel ladle falling prevention and alarm device as claimed in claim 1, wherein: a pressure alarm and data wireless transmission trigger device is arranged between a shaft and a hole on a hanging beam of the suspension pulley block.
CN202010027738.2A 2020-01-10 2020-01-10 Prevent that ladle falls and alarm device Pending CN111115460A (en)

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CN202010027738.2A CN111115460A (en) 2020-01-10 2020-01-10 Prevent that ladle falls and alarm device

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Application Number Priority Date Filing Date Title
CN202010027738.2A CN111115460A (en) 2020-01-10 2020-01-10 Prevent that ladle falls and alarm device

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CN202010027738.2A Pending CN111115460A (en) 2020-01-10 2020-01-10 Prevent that ladle falls and alarm device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113333728A (en) * 2021-04-28 2021-09-03 原旭东 Steel ladle carrying device for metal smelting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113333728A (en) * 2021-04-28 2021-09-03 原旭东 Steel ladle carrying device for metal smelting

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Application publication date: 20200508

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