CN107298377B - The crane loading system balanced between suspension centre - Google Patents
The crane loading system balanced between suspension centre Download PDFInfo
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- CN107298377B CN107298377B CN201710548524.8A CN201710548524A CN107298377B CN 107298377 B CN107298377 B CN 107298377B CN 201710548524 A CN201710548524 A CN 201710548524A CN 107298377 B CN107298377 B CN 107298377B
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- Prior art keywords
- projection
- winding drum
- steel wire
- wire rope
- camshaft
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
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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
- B66D1/26—Rope, cable, or chain winding mechanisms; Capstans having several drums or barrels
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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
- B66D1/30—Rope, cable, or chain drums or barrels
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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
- B66D1/40—Control devices
- B66D1/48—Control devices automatic
- B66D1/485—Control devices automatic electrical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The crane loading system balanced between a kind of suspension centre of disclosure of the invention, its equalizer bar both ends is connected to steel wire rope, two steel wire rope one end are fixed on equalizer bar, the two steel wire rope other ends are separately fixed on the winding drum of a hoisting mechanism, radially slided on winding drum and be provided with projection, the slide opening of the outer end stretching for projection is provided with winding drum, the inner segment of projection is in winding drum, camshaft is rotatably equipped with winding drum, be provided with the stage clip inner termination of projection being pressed on the cam of camshaft between projection and winding drum, rotation stop position limiting structure is provided between winding drum and camshaft.The projection radially slided is provided with the winding drum of invention, projection can tie up the space on winding drum when overhanging, so that steel wire rope earlier be raised to the second layer, winding drum turns over the same number of turns, the length that steel wire rope rises will be longer, Heave Here rise is higher, so as to adjust the height between each Heave Here, realizes the position balance between two Heave Heres.
Description
Technical field
Invention is related to a kind of crane loading system, more particularly to the crane loading system balanced between a kind of suspension centre, category
In crane field.
Background technology
The tackling system of crane typically all has multiple Heave Heres, so-called Heave Here refer on equalizer bar with steel wire rope
Fixed point, the other end of steel wire rope are integrally fixed on the winding drum of winding drum mechanism, and when winding drum rotates, winding drum is by steel
Cord volume is upper or decontrols, and realizes the lifting of crane with falling, due to the diameter of steel wire rope, modulus of elasticity, stress size, mill
As damage situation and winding drum diameter with abrasion condition can never be, this allows for steel wire rope and weight tie point
Lifting speed not exclusively, forms asynchronous between each suspension centre, and the asynchronous degree between suspension centre can be with the increasing of lifting altitude
Add and increase, or even derricking gear cisco unity malfunction can be made, or even cause the accident.
The content of the invention
The purpose of invention is to provide the crane loading system balanced between a kind of suspension centre, to solve in the prior art because of each
The difference between steel wire rope on suspension centre and caused by the lifting speed difference of each Heave Here cause crane cisco unity malfunction
The problem of.
In order to realize the above object invention adopts the following technical scheme that：A kind of crane loading system balanced between suspension centre,
With equalizer bar, the both ends of equalizer bar are connected to steel wire rope, and one end of two steel wire ropes is fixed on equalizer bar, two steel wire ropes
The other end correspond be separately fixed on the winding drum of two hoisting mechanisms, radially slided on the winding drum be provided with it is convex
Post, the slide opening of the outer end stretching for projection is provided with winding drum, the inner segment of projection is in winding drum, and dress is rotated in winding drum
Equipped with camshaft, the stage clip being pressed on the inner termination of projection on the cam of camshaft is provided between projection and winding drum, is rolled up
Raise and rotation stop position limiting structure is provided between cylinder and camshaft.
Described projection is a relative to the overhang of the outer surface of winding drum, and the equation using a as unknown number is：2{[(R+
a)2+r2-R2]1/2+r}-2R{arctan[r/(R+a)]+arctan{[(R+a)2+r2-R2]1/2/R}}+2{[(R+a+D)2+r2-(R
+D)2]1/2+r}-2(R+D){arctan[r/(R+a)]+arctan{[(R+a)2+r2-R2]1/2/R}}+…+2{[(R+a+(K-1)
D)2+r2-(R+(K-1)D)2]1/2+r}-2[R+(K-1)D]{arctan[r/(R+a)]+arctan{[(R+a)2+r2-R2]1/2/
R } }=L, wherein, L is that equalizer bar is raised to top, longer shorter of the steel wire rope section that is not wrapped on winding drum of residue
Longer length, R are the radius of winding drum, and r is the radius of projection, and D is the diameter of steel wire rope, and K is the natural number more than zero,
The winding number of plies of steel wire rope is referred to, R, r, D, K are datum.
The outer face of described projection is close to the arcwall face that the part at winding drum both ends is high, centre is low.
The drive device of described camshaft is with the variable-frequency motor for powering off braking system, described rotation stop position limiting structure
For the power-off braking system.
The displacement transducer of detection steel wire rope displacement, displacement transducer and center are provided with described hoisting mechanism
Controller is connected, and the length that displacement transducer moves past steel wire rope passes to central controller, if the length that steel wire rope moves past is small
Before the length that should be moved past of steel wire rope, next raising, central controller will control variable-frequency motor rotation driving projection overhanging,
If the length that steel wire rope moves past is more than the length that should be moved past of steel wire rope, before next raising, central controller will control frequency conversion
Motor rotates driving projection and inside contracted.
Rolling element is provided between the wheel face of described cam and the inner face of projection.
Annular groove is offered on the wheel face of described cam, the bottom land rolling of described rolling element and annular groove coordinates, rolling
The spacing cooperation of both sides cell wall of kinetoplast and annular groove, offer on the inner face of described projection consistent with the axis of camshaft
Strip slot, the rolling element rolls with strip slot to be coordinated.
Described projection is the outer section of step circular shaft that diameter is small, inner segment diameter is big, and described stage clip is set in the outer section of projection,
The inner of stage clip is pressed on the step surface of projection, and the outer end top pressure of stage clip is on the inner surface of winding drum.
The both ends of described camshaft are in the centre of winding drum by bearing and winding drum rolling assembling, described projection
Position.
Described rotation stop position limiting structure is electromagnetic clutch.
The projection radially slided is provided with the winding drum of invention, projection is driven by cam of the rolling assembling inside winding drum
It is dynamic to stretch out winding drum and inside contracted in the presence of stage clip, the space on winding drum can be tied up when projection is overhanging so that steel wire rope
Earlier be raised to the second layer, winding drum turns over the same number of turns, and the length that steel wire rope rises will be longer, and Heave Here rise is higher,
So as to adjust the height between each Heave Here, the position balance between two Heave Heres is realized, ensures lifting function normal work.
The outer face of the projection of invention is to be wound on close to the arcwall face that the part at winding drum both ends is high, centre is low, steel wire rope
When on the external end head of projection, it can coordinate with arcwall face, will not careless shift position.
The drive device of invention is the variable-frequency motor with power-off braking system, and detection steel wire is provided with hoisting mechanism
The displacement transducer for displacement of restricting, displacement transducer are connected with central controller, the length that displacement transducer moves past steel wire rope
Degree passes to central controller, if the length that moves past of steel wire rope is less than the length that should be moved past of steel wire rope, before next raising, in
Entreating controller that variable-frequency motor will be controlled to rotate, driving projection is overhanging, if the length that steel wire rope moves past is more than should moving past for steel wire rope
Length, before next raising, central controller will control variable-frequency motor to rotate driving projection and inside contract, so as to realize that projection should be stretched
Go out the actual learning of length.
Rolling element is provided between the wheel face of the cam of invention and the inner face of projection so that energy can between cam and projection
Moved by realizing.
Brief description of the drawings
Fig. 1 is the overall structure diagram of inventive embodiments；
Fig. 2 is the partial sectional view at A in Fig. 1；
Fig. 3 is around first layer construction of wire rope schematic diagram on projection；
Fig. 4 is around second layer construction of wire rope schematic diagram on projection；
Fig. 5 is cross-sectional view of the camshaft at cam.
Embodiment
A kind of embodiment of the crane loading system balanced between suspension centre, in fig. 1 and 2, the both ends point of its equalizer bar 1
Steel wire rope 2 is not connected with, and one end of this two steel wire ropes 2 is separately fixed at the both ends of equalizer bar 1, the other end of two steel wire ropes 2
One-to-one corresponding is fixed on the winding drum 3 of two hoisting mechanisms, that is to say, that the other end of steel cable 2 is fixed on a volume
Raise on cylinder 3, the other end of another steel cable 2 is fixed on another winding drum 3.Cam is rotatably equipped with winding drum 3
Axle 4, the both ends of camshaft 4 are provided with projection 5 by bearing and the rolling assembling of winding drum 3 in winding drum 3, projection 5 be along
Winding drum 3 radially slides setting, and projection 5 is in the middle part of winding drum 3.The inner termination top pressure of projection 5 is in camshaft 4
Cam 6 on, offer slide opening 7 on winding drum 3, the outer section of projection 5 can be stretched out by being slided in slide opening 7, and projection 5 is outer section
The circular shaft that diameter is small, inner segment diameter is big, is arranged with stage clip 8 in the outer section of projection 5, and the inner of stage clip 8 is pressed on the platform of projection 5
On terrace, on the inner surface of winding drum 3, the inner segment of winding drum 3 is in winding drum 3 external end impacts of stage clip 8.Projection 5
Outer face is close to the arcwall face that the part at the both ends of winding drum 3 is high, centre is low, so, in wirerope-winding in the termination of projection 5
It when upper, can be stuck in arcwall face, and will not move axially.
The drive device of camshaft 4 is the variable-frequency motor 9 with power-off braking system, and variable-frequency motor 9 is with winding drum
Rotate together, so, the electric power-feeding structure of variable-frequency motor 9 needs to set electric slip ring structure, and this is a kind of prior art, that is,
A part for power supply electric wire is to rotate, and another part is motionless, prevent electric wire with the rotation of variable-frequency motor 9 and around dead,
It can not work.Power-off braking system can prevent the rotation stop position limiting structure of cam axle, as camshaft 4, Ke Yiwei with locking
Camshaft 4 positions, and the variable-frequency motor with power-off braking system is part purchased in market, and this kind of motor is very common, in general variable-frequency motor
And servomotor all can locking when power is off, so-called locking is it is, the output shaft of motor can not rotate.
Annular groove 10 is offered on the wheel face of cam 6, the axis with camshaft 4 is offered on the inner face of projection 5
Consistent strip slot 11, ball 12, ball 12 and annular groove 10 are provided with the space that annular groove 10 and strip slot 11 are formed
Bottom land roll and coordinate, the spacing cooperation of both sides cell wall of ball 12 and annular groove 10, ball 12 also rolls cooperation with strip slot 11.
Displacement transducer 13 is provided with hoisting mechanism, displacement transducer is fixed on the basis of hoisting mechanism, also
Be relative on the motionless position of the foundation of civil work of erection crane, displacement transducer 13 be used to detecting steel wire rope movement away from
From displacement transducer 13 is connected with central controller transmission, and the Distance Transmission that displacement transducer 13 can move past steel wire rope is in
Controller is entreated, after raising terminates, central controller can gather the data that displacement transducer 13 transmits, with being previously entered to center
The length that steel wire rope in controller should move past is compared, if the length that moves past of steel wire rope is less than should moving past for steel wire rope
Length, before next raising, it is overhanging that central controller will control variable-frequency motor to rotate driving projection, if the length that steel wire rope moves past is big
Before the length that should be moved past of steel wire rope, next raising, central controller will control variable-frequency motor to rotate driving projection and inside contract,
The extension elongation of projection is finely tuned with this.Here central processing unit is using the processor of PLC programmings, the power-off of hoisting mechanism
Central processing unit is transferred to multiplexed electrical signal, at the time of with this to judge that raising terminates to start with raising.The volume of specific procedure
The realization write and controlled belongs to routine techniques to one skilled in the art, without spending creative work, herein not
It is described in detail again.
In actual motion, the overhang of projection can be determined so, and projection is contracted in winding drum, and equalizer bar is raised into top
Portion, measure the longer shorter longer length L of the remaining steel wire rope section not being wrapped on winding drum.Stretched out in projection
After, shown in Fig. 3 is that the overhang of projection is a, and a is effectively to stretch around first layer construction of wire rope schematic diagram on projection
Output, that is, the distance between the minimum point of projection external end head and elevator tube outer surface, the radius of projection is r, winding drum
Radius is R, and the length between the edge and winding drum of projection is x, and wherein r, R is datum, and steel wire rope is in projection and elevator
Part between cylinder is y, x2=(R+a)2+r2, y2=x2-R2=(R+a)2+r2-R2, then, steel wire rope is in itself and winding drum
Two point of contacts between the length of part be：2 (y+r)=2 { [(R+a)2+r2-R2]1/2+r}.And volume is not stretched out in projection
When raising tin, angle that steel wire rope is in its part between two point of contacts of winding drum is θ, θ=2 (alpha+beta), Tan α=r/ (R
+a)；Tan β=y/R；α=arctan [r/ (R+a)], β=arctan (y/R)；θ=2 { arctan [r/ (R+a)]+arctan
(y/R) }, then, the length that steel wire rope is in its part between two point of contacts of winding drum is equal to R θ, wherein：Tanα
For α tangent.So, because projection stretch out and more around first layer rope capacity be：2 (y+r)-R θ=2 { [(R+a)2+
r2-R2]1/2+r}-2R{arctan[r/(R+a)]+arctan{[(R+a)2+r2-R2]1/2/R}}。
Shown in Fig. 4 is that the overhang of projection is a, and a is effective around second layer construction of wire rope schematic diagram on projection
Overhang, that is, the distance between the minimum point of projection external end head and elevator tube outer surface, the radius of projection are r, winding drum
Radius be R, a diameter of D of steel wire rope, the length between the edge and winding drum of projection is x1, steel wire rope be in projection with volume
It is y to raise the part between cylinder1, wherein r, R, D is datum, x1 2=(R+a+D)2+r2, y1 2=x1 2-(R+D)2=(R+a+D)2+
r2-(R+D)2, then, the length that steel wire rope is in its part between two point of contacts of winding drum is：2(y1+ r)=2 { [(R
+a+D)2+r2-(R+D)2]1/2+r}.And when projection does not stretch out winding drum, second layer steel wire rope is in it to be twined with winding drum
The angle of part between two point of contacts of the structure after first layer steel wire rope is still θ, θ=2 (alpha+beta), Tan α=r/ (R+
a)；Tan β=y/R；α=arctan [r/ (R+a)], β=arctan (y/R)；θ=2 { arctan [r/ (R+a)]+arctan (y/
R) }, then, second layer steel wire rope is in it and is wound with winding drum between two point of contacts of the structure after first layer steel wire rope
Partial length is equal to (R+D) θ, wherein：Tan α are α tangent.So, because projection stretch out and more around second layer steel wire
Rope length degree is：2(y1+ r)-(R+D) θ=2 { [(R+a+D)2+r2-(R+D)2]1/2+r}-2(R+D){arctan[r/(R+a)]+
arctan{[(R+a)2+r2-R2]1/2/R}}。
By that analogy, because projection stretch out and more around K layer rope capacities be：2{[(R+a+(K-1)D)2+r2-
(R+(K-1)D)2]1/2+r}-2[R+(K-1)D]{arctan[r/(R+a)]+arctan{[(R+a)2+r2-R2]1/2/R}}.Wherein
K is the natural number more than zero, refers to the winding number of plies of steel wire rope, is datum, can be estimated in advance according to the length of steel wire rope
Meter comes out, because, after projection stretching, even if the total length of the steel wire rope of winding drum last layer can increase, before and after projection stretches out,
After the steel wire rope for needing to wind all has twined, the steel wire rope number of plies on winding drum there will not be one layer of difference, because originally should
The nature difference of steel wire rope and caused by between each steel wire rope difference in length it is just very small.
By the additional rope capacity of each layer be added can calculate because projection stretches out and more around all steel wires
The length of rope, this length are：2{[(R+a)2+r2-R2]1/2+r}-2R{arctan[r/(R+a)]+arctan{[(R+a)2+r2-
R2]1/2/R}}+2{[(R+a+D)2+r2-(R+D)2]1/2+r}-2(R+D){arctan[r/(R+a)]+arctan{[(R+a)2+r2-
R2]1/2/R}}+…+2{[(R+a+(K-1)D)2+r2-(R+(K-1)D)2]1/2+r}-2[R+(K-1)D]{arctan[r/(R+a)]
+arctan{[(R+a)2+r2-R2]1/2/ R } }, this total length should be equal to L, also just draw a linear equation with one unknown, wherein
Unknown number is a, and a occurrence, that is, the specific overhang of projection can be drawn by solving this equation.
Above-mentioned computational methods are the mathematical modeling simplified, because the fit-up gap between foozle, each part also has
The problems such as Clearance Between Wound between adjacent turn steel wire rope, there can be a little bias with result of calculation unavoidably in Practical Project, because
This, the present embodiment is finely adjusted using central controller to the overhang of projection, simultaneously as in Practical Project, and need not
It is definite as mathematics, even if because there is fraction of error, that is, even two Heave Heres be not synchronization so not yet
The work of crane can be influenceed, as long as the height difference between two Heave Heres is not the normal work for influenceing crane, a little not
Synchronous also it doesn't matter, and also Just because of this, the overhang of projection can also be drawn by experiment, simply not accurate enough, still
The work of crane is nor affected on, the solution of the present invention can also be realized.
Fig. 5 is cross-sectional view of the camshaft at cam, and the origin of reference axis is arranged in camshaft
Heart position, shown is the relation between projection overhang a and camshaft position, if the A points of camshaft contact with projection
When, flush with outer surface of the projection just with winding drum, and when being contacted at the B points of camshaft with projection, the overhang a of projection is
For the difference of the distance between A points and origin and the distance between B points and origin, designed in cam, after structure determination, so that it may
To be calculated according to a the angle that is rotated further is needed relative to A points camshaft, the rotating rule of a secondary control camshaft, certainly,
This rule can also be obtained by testing, and the overhang for finally causing projection is a, may be not accurate enough, but in work
Cheng Dangzhong need not be accurate to determination value, and under certain error, crane is also to work.In the present embodiment
The contour line of cam be by two sections of camber lines and two rectilinear(-al)s tangent with two sections of camber lines, in other examples,
Other curve types can be selected.
Rotation stop position limiting structure in the present embodiment is the power-off braking system of variable-frequency motor, in other embodiments can also
Can be manually magnet switching electricity, manual rotation cam axle at this moment for electromagnetic clutch.Certainly, rotation stop position limiting structure also may be used
Think other rotation stop position limiting structures, such as mechanical rotation stop position limiting structure.
Projection in the present embodiment is a kind of specific structure provided according to accompanying drawing, in other embodiments, this area
Technical staff known to, structure that can realize technical scheme can also use.
Rolling element in the present embodiment is ball, in other embodiments, rolling element can also select cylindrical roller or
Taper roller.
In the present embodiment, the external end head of projection is arcwall face, and in other embodiments, the external end head of projection can also be
Plane.
Claims (9)
1. the crane loading system balanced between a kind of suspension centre, having equalizer bar, the both ends of equalizer bar are connected to steel wire rope,
One end of two steel wire ropes is fixed on equalizer bar, and the other end of two steel wire ropes corresponds the volume for being separately fixed at two hoisting mechanisms
Raise on cylinder, it is characterised in that：Radially slided on the winding drum and be provided with projection, the outer end being provided with winding drum for projection is stretched
The slide opening gone out, the inner segment of projection are in winding drum, and camshaft is rotatably equipped with winding drum, is set between projection and winding drum
There is the stage clip being pressed on the inner termination of projection on the cam of camshaft, the spacing knot of rotation stop is provided between winding drum and camshaft
Structure, described projection are a relative to the overhang of the outer surface of winding drum, and the equation using a as unknown number is：2{[（R+a）2+r2
-R2] 1/2+r }-2R{arctan[r/（R+a）]+ arctan{[（R+a）2+r2 -R2] 1/2/R}}+2{[（R+a+ D）2+r2 -
（R+ D）2] 1/2+r }-2（R+ D）{arctan[r/（R+a）]+ arctan{[（R+a）2+r2 -R2] 1/2/R}}+…+2
{[（R+a+ （K-1）D）2+r2-（R+（K-1）D）2] 1/2+r }-2[R+( K-1)D]{arctan[r/（R+a）]+ arctan
{[（R+a）2+r2 -R2] 1/2/ R } }=L, wherein, L is that equalizer bar is raised to top, and residue is not wrapped in the steel wire rope on winding drum
The longer shorter longer length in part, R are the radius of winding drum, and r is the radius of projection, and D is the straight of steel wire rope
Footpath, K are the natural number more than zero, refer to the winding number of plies of steel wire rope, R, r, D, K are datum.
2. the crane loading system balanced between suspension centre according to claim 1, it is characterised in that：Outside described projection
End face is close to the arcwall face that the part at winding drum both ends is high, centre is low.
3. the crane loading system balanced between suspension centre according to claim 2, it is characterised in that：Described camshaft
Drive device is the variable-frequency motor with power-off braking system, and described rotation stop position limiting structure is the power-off braking system.
4. the crane loading system balanced between suspension centre according to claim 3, it is characterised in that：Described hoisting mechanism
On be provided with the displacement transducer of detection steel wire rope displacement, displacement transducer is connected with central controller, displacement transducer
The length that steel wire rope is moved past passes to central controller, if the length that steel wire rope moves past is less than the length that should be moved past of steel wire rope
Spend, before next raising, central controller will control variable-frequency motor rotation driving projection overhanging, if the length that steel wire rope moves past is more than
The length that should be moved past of steel wire rope, before next raising, central controller will control variable-frequency motor to rotate driving projection and inside contract.
5. the crane loading system balanced between the suspension centre according to any one in claim 1-4, it is characterised in that：Institute
Rolling element is provided between the wheel face for the cam stated and the inner face of projection.
6. the crane loading system balanced between suspension centre according to claim 5, it is characterised in that：The wheel of described cam
Annular groove is offered on face, the bottom land rolling of described rolling element and annular groove coordinates, the both sides cell wall of rolling element and annular groove
Spacing cooperation, the strip slot consistent with the axis of camshaft, the rolling element and bar are offered on the inner face of described projection
Shape trough roller is dynamic to be coordinated.
7. the crane loading system balanced between suspension centre according to claim 6, it is characterised in that：Described projection is outer
The section step circular shaft that diameter is small, inner segment diameter is big, described stage clip are set in the outer section of projection, and the inner of stage clip is pressed on projection
On step surface, the outer end top pressure of stage clip is on the inner surface of winding drum.
8. the crane loading system balanced between suspension centre according to claim 7, it is characterised in that：Described camshaft
Both ends are in the middle part of winding drum by bearing and winding drum rolling assembling, described projection.
9. the crane loading system balanced between suspension centre according to claim 1 or 2, it is characterised in that：Described rotation stop
Position limiting structure is electromagnetic clutch.
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| JPH1111882A (en) * | 1997-06-17 | 1999-01-19 | Mitsubishi Heavy Ind Ltd | Rope drum |
| CN101003347A (en) * | 2007-01-18 | 2007-07-25 | 卫华集团有限公司 | Equipment for balancing outofstep sustained center of crane |
| CN102363497A (en) * | 2011-08-26 | 2012-02-29 | 栾清杨 | Adjustable balanced lifting beam |
| CN202880686U (en) * | 2012-09-21 | 2013-04-17 | 河南卫华重型机械股份有限公司 | Balance lifting appliance of ultra-high head crane |
| CN203006760U (en) * | 2012-12-10 | 2013-06-19 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Crane cable wire adjusting device |
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| CN107298377A (en) | 2017-10-27 |
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Effective date of registration: 20210811 Address after: 061000 No. 6, industrial Street, Chengdong high tech park, Xianxian County Economic and Technological Development Zone, Cangzhou City, Hebei Province Patentee after: HEBEI ZHANXING SLING GROUP Co.,Ltd. Address before: No. 131, Xulou village, Pudong District, Changyuan County, Xinxiang City, Henan Province Patentee before: Xu Xiao |