CN103449299A - Horizontally rotatable regulating method of hoisting equipment and hoisted objects - Google Patents
Horizontally rotatable regulating method of hoisting equipment and hoisted objects Download PDFInfo
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- CN103449299A CN103449299A CN 201310380211 CN201310380211A CN103449299A CN 103449299 A CN103449299 A CN 103449299A CN 201310380211 CN201310380211 CN 201310380211 CN 201310380211 A CN201310380211 A CN 201310380211A CN 103449299 A CN103449299 A CN 103449299A
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Abstract
The invention relates to a horizontally rotatable regulating method of hoisting equipment and hoisted objects. The hoisting equipment comprises steel wire ropes and a hoisting appliance and horizontally rotatable regulating devices, wherein the steel wires and the horizontally rotatable regulating devices are hoisted through hoisting points; the hoisting appliance is connected below the horizontally rotatable regulating devices; the horizontally rotatable regulating devices rotate in a horizontal plane around the hoisting points under the driving of the counteracting force generated by flowing of fluids so as to drive the hoisting appliance to rotate in the horizontal plane. The horizontally rotatable regulating method of hoisting equipment and hoisted objects, which is provided by the invention, can be used for driving the horizontally rotatable regulating devices to rotate through the counteracting force generated in the motion of fluids so as to further drive the objects to rotate horizontally to facilitate subsequent operation and achieve the aim of horizontally rotatable positioning, has the characteristics of simple structure, convenience in operation, reliable performances and low cost, and effectively solves the problem that the objects are difficult to regulate to rotate horizontally in single hoisting point, thereby preventing the safety hazard, improving the working efficiency, and being specially suitable for occasions with inconvenience in manual intervention.
Description
Technical field
The present invention relates to the lifting machinery field, particularly relate to the control method that horizontally rotates of a kind of lifting appliance and lifting thing.
Background technology
At present, in general lifting appliance working process, goods, in being lifted to the process of depositing, usually needing level to change an angle, or need to turn back to original angle after goods can depart from original angle automatically when not needing to change angle.
Please refer to Fig. 1, lifting appliance of the prior art comprises crane carriage 7, suspender 2, auxiliary lifting appliance 6 and elevator 8, is wound with steel rope 1 on elevator 8, and steel rope 1 is connected with the suspension centre on suspender 2 by pulley.The below of suspender 2 is equipped with electric rotary body 10, and the below of electric rotary body 10 is provided with auxiliary lifting appliance 6, and goods 9 is hung on auxiliary lifting appliance 6.
As shown in Figure 1, two steel ropes 1 are connected with suspender 2 by two or more suspension centres, and now, suspender 2 is fixed in the horizontal direction.When needs are regulated the orientation angles of goods aspect horizontal, can drive goods 9 rotate in horizontal surface by electric rotary body 10, thereby carry out the rotation of horizontal direction to control goods 9.Especially, crane carriage 7 can move along guide rail, to drive suspender 2, auxiliary lifting appliance 6 and goods 9 thereof, correspondingly moves.
As shown in Figure 2, steel cable 1 is connected with suspender 2 by an independent suspension centre, and the below of suspender 2 is equipped with auxiliary lifting appliance 6, and goods 9 is hung on auxiliary lifting appliance 6, and steel rope 1 is connected with elevator 8.Especially, crane carriage 7 can move along guide rail, to drive suspender 2, auxiliary lifting appliance 6 and goods 9 thereof, correspondingly moves.In this case, because suspender 2 self can't be fixed in the horizontal direction, thereby rely on the operation of weight-lifting equipment itself or control the goods 9 that can't make lifting and produce needed horizontally rotating, often need in this case the surface work personnel intervened, with the angle of depositing of adjustment goods.
Summary of the invention
The purpose of this invention is to provide the control method that horizontally rotates that a kind of structure is simple in structure, control lifting appliance convenient, that cost is low, that can make single suspension centre and the rotation of goods occurred level thereof and lifting thing.
For solving the problems of the technologies described above, as first aspect of the present invention, a kind of lifting appliance is provided, comprise: steel rope and suspender, lifting appliance also comprises: horizontal turning adjusting device, steel rope and horizontal turning adjusting device hang and connect by hanging contact, and suspender is connected to the below of horizontal turning adjusting device; Horizontal turning adjusting device rotates in horizontal surface around hanging contact under the driving due to the mobile antagonistic force produced of fluid, to drive suspender, in horizontal surface, rotates.
Further, horizontal turning adjusting device comprises annular pipeline, and pump is installed on pipeline, is contained with fluid in pipeline, thereby fluid flows and produces antagonistic force under the driving of pump in pipeline.
Further, lifting appliance also comprises: controller, for acceleration/accel and the direction of rotating by control pump, control the size and Orientation of antagonistic force.
Further, lifting appliance also comprises: variable-frequency motor is electrically connected to pump and controller, for the order-driven pump according to controller.
Further, lifting appliance also comprises: handling device is electrically connected to controller, for sending to controller for controlling the control signal of acceleration/accel and direction.
Further, handling device comprises: three-postion switch, with controller, be electrically connected to, for generate controlling party to control signal.
Further, lifting appliance also comprises: auxiliary lifting appliance is positioned at the below of suspender, and is connected with suspender.
As second aspect of the present invention, a kind of control method that horizontally rotates that lifts by crane thing is provided, comprising: below hanging contact, the pipeline that fills fluid is set; Drive the fluid in pipeline to flow, thereby produce an antagonistic force contrary with the flow direction of fluid; Utilize antagonistic force to drive pipeline to rotate around hanging contact, thereby drive suspended object to rotate in horizontal surface.
Further, by controlling mobile acceleration/accel and the direction of fluid, control the size and Orientation of antagonistic force.
Further, use the pump drive fluid be arranged on pipeline to flow; Utilize the motion of Frequency Converter Control pump to control mobile acceleration/accel and the direction of fluid.
Antagonistic force when the present invention can be by liquid motion drives horizontal turning adjusting device to rotate, thereby further driving goods is rotated in the horizontal direction, so that follow-up operation, realization horizontally rotates the purpose of location, there are simple in structure, easy to operate, dependable performance, characteristics that cost is low, can't regulate the problem that goods horizontally rotates while efficiently solving single suspension centre, thereby avoided potential safety hazard, improved work efficiency, be specially adapted to be not easy to the occasion (working environments such as high temperature, danger) of manual intervention.
The accompanying drawing explanation
Fig. 1 has schematically shown the structural representation of the lifting appliance of many suspension centres of the prior art;
Fig. 2 has schematically shown the structural representation of the lifting appliance of single suspension centre of the prior art;
Fig. 3 has schematically shown the structural representation of the lifting appliance of the single suspension centre in the present invention;
Fig. 4 has schematically shown the structural representation of the horizontal turning adjusting device in the present invention;
Fig. 5 has schematically shown the cutaway view of the pump in the present invention;
Fig. 6 has schematically shown the lateral plan of Fig. 5;
Fig. 7 has schematically shown the structural representation of Fig. 5 after removing rotor part; And
Fig. 8 has schematically shown the structural representation of the rotor part in Fig. 5.
Reference numeral in figure: 1, steel rope; 2, suspender; 3, horizontal turning adjusting device; 4, pipeline; 5, pump; 6, auxiliary lifting appliance; 7, crane carriage; 8, elevator; 9, goods; 10, electric rotary body; 100, housing; 110, stack shell; 120, end cap; 130, lining; 200, stator department; 300, flow-guiding channel; 310, first passage; 320, second channel; 330, butt flange; 400, bearing; 500, rotor part; 510, impeller; 511, impeller channel; 512, axle; 513, guide shell; 513a, inner barrel; 513b, outer cylinder body; 514, blade; 520, rotor; 530, locations; 600, fixed mount; 700, bearing.
The specific embodiment
Below embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
The present invention is directed to above problem, a kind of lifting appliance has been proposed, it has and is arranged on rotating driver on suspender, that can automatically produce rotary power (horizontal turning adjusting device 3), horizontally rotate and adjust with gib head to drive goods, thereby can control on demand the stacking angle of goods.
As a first aspect of the present invention, please refer to Fig. 3 and Fig. 4, the invention provides a kind of lifting appliance, the lifting appliance (weight-lifting equipment) that particularly a kind of suspender can be horizontally rotated, need to carry out the occasion that suspender horizontally rotates for example, during, applicable to an assembly pulley connection of employing between crane carriage and suspender (or gib head).
Lifting appliance in the present invention comprises: steel rope 1 and suspender 2.Further, this lifting appliance also comprises: horizontal turning adjusting device 3, and steel rope 1 and horizontal turning adjusting device 3 hang and connect by hanging contact, and suspender 2 is connected to the below of horizontal turning adjusting device 3; Horizontal turning adjusting device 3 rotates in horizontal surface around hanging contact under the driving of the antagonistic force for example, produced because fluid (, liquid or gas etc.) flows, and to drive suspender 2, in horizontal surface, rotates.
Especially, lifting appliance also comprises crane carriage 7, wherein, between crane carriage 7 and suspender 2, adopts an assembly pulley or a suspension centre to couple together, thereby forms single suspension centre structure.
During use, when needs make goods, with gib head, horizontally rotate and adjust, when controlling on demand the stacking angle of goods, can operant level rotation adjustment device 3, the fluid in it is flowed with a direction, when fluid flows, can produce antagonistic force.So this antagonistic force drives horizontal turning adjusting device 3 self to rotate, thereby further drive goods 9, rotated in the horizontal direction, so that follow-up operation, realization horizontally rotates the purpose of location.
Visible, antagonistic force when the present invention can be by liquid motion drives horizontal turning adjusting device 3 to rotate, thereby further driving goods 9 is rotated in the horizontal direction, so that follow-up operation, realization horizontally rotates the purpose of location, there are simple in structure, easy to operate, dependable performance, characteristics that cost is low, can't regulate the problem that goods horizontally rotates while efficiently solving single suspension centre, thereby avoided potential safety hazard, improved work efficiency, be specially adapted to be not easy to the occasion (working environments such as high temperature, danger) of manual intervention.
Horizontal turning adjusting device 3 has been installed between suspender and goods due to the present invention, thereby, can for example, by the driver of lifting appliance (hoisting crane) goods horizontal storage direction be carried out manual regulation or automatically be controlled.Solved in prior art, goods has been carried out to the technical matters of horizontal direction control.
In one embodiment, horizontal turning adjusting device 3 comprises annular pipeline 4, and pump 5 is installed on pipeline 4, in pipeline 4, is contained with fluid, thereby fluid produces antagonistic force interior the flowing of pipeline 4 under the driving of pump 5.Preferably, the number of pump 5 is a plurality of (for example two), a plurality of pumps 5 circumferentially being uniformly distributed along pipeline 4.After the power supply of connecting pump 5, pump 5 rotates, thereby drive fluid is in the interior motion of pipeline 4.Preferably, the stator winding parallel connection of a plurality of pumps 5, then be connected to control system with a cable by the lifting cable drum, like this, just can pass through a control system, controls a plurality of pumps 5 simultaneously and synchronously move.
Obviously, horizontal turning adjusting device 3 in the present invention is not limited to above-mentioned concrete structure, the principle of antagonistic force when those skilled in the art can also be flowed according to fluid, design the horizontal turning adjusting device 3 of other structure, as long as its antagonistic force met while using fluid to flow is used as propulsive effort, all can be regarded as the distortion of the horizontal turning adjusting device 3 in the present invention, replaceable or equivalent way.
Preferably, lifting appliance also comprises: controller, for acceleration/accel and the direction by control pump 5 rotations, control the size and Orientation of antagonistic force.Velocity of rotation and situation of change thereof that can control pump 5 by controller, thus the size and Orientation of antagonistic force controlled.
Preferably, lifting appliance also comprises: variable-frequency motor is electrically connected to pump 5 and controller, for the order-driven pump 5 according to controller.Controller can be regulated the rotating speed of variable-frequency motor, thereby reaches the purpose of regulating pump 5.Control in the same way rotating speed and the direction of two or many pumps 5 by frequency-converting speed-governing control system, thereby control mobile speed and the direction of fluid in pipeline, thereby control by pipeline, to the goods output of its lower end, can carry out the drive torque of size and direction adjusting.Obviously, being used for the device of the rotating speed of control pump 5 and direction in the present invention has multiplely, is not limited in above-mentioned variable-frequency motor.
Preferably, lifting appliance also comprises: handling device is electrically connected to controller, for sending to controller for controlling the control signal of acceleration/accel and direction.Handling device is inputted corresponding control command for driver or operating personal, after controller receives these control commands, can control accordingly horizontal turning adjusting device 3.
Preferably, handling device comprises: three-postion switch, with controller, be electrically connected to, for generate controlling party to control signal.Especially, when M/C, three-postion switch is the change-over swith with " left-handed-as to stop-dextrorotation " three, and it can be used for controlling the angle of depositing of goods.
In addition, the present invention also can adopt the mode of automatic operation, now, the driver only need to select the angle that will locate, also can carry out by video imaging apparatus the anglec of rotation of detection level rotation adjustment device 3, now, system is direction and the rotating speed of control pump 5 automatically, makes goods be positioned at needed depositing on angle with actuator.
Preferably, lifting appliance also comprises: auxiliary lifting appliance 6 is positioned at the below of suspender 2, and is connected with suspender 2.
Below, provide a preferred embodiment of the pump 5 that can preferably use in a kind of the present invention, obviously, the pump in the present invention is not limited to the structure in Fig. 5 to Fig. 8, so long as can drive the mobile pump of fluid in pipeline, may be used to the present invention.
Please refer to Fig. 5 to Fig. 8, the pump 5 in the present invention can be installed on pipeline, is a kind of tubing pump that glandless motor pump and motor are integrated.
This pump 5 comprises: housing 100; Stator department 200, be arranged in housing 100; Flow-guiding channel 300, be connected with housing 100; Bearing 400, be arranged on the position corresponding with flow-guiding channel 300 regularly; Rotor part 500, rotor part 500 comprises impeller 510 and the rotor 520 be connected with impeller 510, impeller 510 is connected pivotly with bearing 400, impeller 510 has impeller channel 511, stator department 200 drives the axis rotation of rotor part 500 along flow-guiding channel 300, and impeller channel 511 is communicated with flow-guiding channel 300.Especially, insulate in the outside of stator department 200, thereby guarantee the insulation of stator department 200 in fluid environment.
During work, when stator department 200(winding) in input produce rotating field after three plase alternating current, after rotor 520 cutting magnetic lines of rotor part 500, produce after eddy current induction again and generate rotor field.Like this, the rotor field that the rotating field of stator department 200 and rotor 520 inductions generate interacts, thereby traction rotor part 500 is rotated with certain revolutional slip (automatically keeping the needed magnetic field intercepts amount of output torque).
After rotor part 500 is rotated, the impeller 510 on it rotates with rotor 520, thereby drive fluid is flowed through, the impeller channel 511 of flow-guiding channel 300 and impeller 510, play the effect of pumping fluid.
Visible, the pump 5 in the present invention in the preferred embodiment does not need to utilize the special electrical motor that is arranged on pipeline external to come drives impeller to be rotated, and can realize the effect of pumping.Thereby, in the time of can not passing the tube wall of pipeline due to the transmission shaft of electrical motor, thereby to have avoided under the state of high-speed motion, transmission shaft and the sealing between pipeline of electrical motor are unreliable, so that cause the problem of fluid leakage.
In addition, owing to not using outside electrical motor, thereby, have the advantages that volume is little, can be applicable to the occasion strict to requirements of installation space.Finally, pump 5 also has characteristics simple in structure, easy for installation, that cost is low, particularly is applicable to the occasion that need to forbid fluid to leak.
Preferably, please refer to Fig. 7, flow-guiding channel 300 comprises first passage 310 and second channel 320, and rotor part 500 is between first passage 310 and second channel 320, and first passage 310 is communicated with second channel 320 by impeller channel 511.For example, first passage 310 and second channel 320 are arranged on the two ends of housing 100 symmetrically, and the two can have trumpet-shaped opening.When impeller 510 rotates, fluid passes through first passage 310, impeller channel 511 and second channel 320 successively.Especially, impeller 510 can form dynamic seal with first passage 310 and second channel 320.
Preferably, a distal process of flow-guiding channel 300 is for the outside of housing 100, and an end of flow-guiding channel 300 is provided with butt flange 330.Utilize butt flange 330, can for example, be connected with outside pipeline (pipeline in Fig. 4 4).
Preferably, bearing 400 is two, and a bearing 400 is arranged in first passage 310, and another bearing 400 is arranged in second channel 320, but the two ends of impeller 510 respectively with two bearings 400 correspondingly pivotable be connected.Especially, between impeller 510 and bearing 400, by bearing 700, be connected pivotly, preferably, can select suitable bearing 700 to be lubricated to adapt to the fluid medium utilized in pipeline, to solve the lubrication problem of bearing 700.Two bearings 400 play the effect of supporting impeller 510, and the two relative end is respectively arranged with mounting hole, and bearing 700 is arranged in corresponding mounting hole.
Preferably, bearing 400 is connected with the inwall of flow-guiding channel 300 by a plurality of fixed mounts 600 that radially extend along flow-guiding channel 300.Especially, fixed mount 600 can be for shaft-like etc.By fixed mount 600, bearing 400 can be fixed on to the central authorities of flow-guiding channel 300.
Preferably, please refer to Fig. 8, impeller 510 comprises axle 512, guide shell 513 and blade 514, guide shell 513 comprises inner barrel 513a and outer cylinder body 513b, inner barrel 513a surrounds axis hole, forms the impeller channel 511 of ring-type between outer cylinder body 513b and inner barrel 513a, and axle 512 is arranged in axis hole, blade 514 is arranged in impeller channel 511, and rotor 520 is installed on the outside of guide shell 513.Blade 514 is connected with outer cylinder body 513b with inner barrel 513a respectively, thereby makes the two form an integral body, synchronously to rotate.As can see from Figure 4, the end of the inwall of outer cylinder body 513b and first passage 310 and second channel 320 has suitable size, guarantee that the inside of first passage 310, impeller channel 511 and second channel 320 formed runners is smooth on the one hand, to reduce fluid resistance, on the other hand, in case of necessity, also can prevent that fluid from entering the space at stator department 200 places.
Preferably, rotor part 500 also comprises locations 530, and axle 512 is through the axis hole on locations 530; Axle 512 has stage portion, and inner barrel 513a is clamped between stage portion and locations 530; The end of outer cylinder body 513b removably is connected with locations 530, especially, can be connected by screw.Locations 530 plays the effect that inner barrel 513a and outer cylinder body 513b are installed.
Preferably, the other end of outer cylinder body 513b has the first outstanding stop part, and the outward flange of locations 530 has the second stop part, and rotor 520 is clamped between the first stop part and the second stop part.Like this, when assembling, just can realize fixing rotor 520 by the first stop part and the second stop part.
Preferably, please refer to Fig. 3, housing 100 comprises stack shell 110 and end cap 120, and stator department 200 is connected with the inwall of stack shell 110, and end cap 120 is connected with the end of stack shell 110, and flow-guiding channel 300 is connected with end cap 120.Especially, stack shell 110 has two openings in left and right, on these two openings, is separately installed with an end cap 120.First passage 310 and second channel 320 are arranged on respectively on an end cap 120.Preferably, between stack shell 110 and end cap 120, by flange, connect.
Preferably, on the inwall of stack shell 110, be provided with stage portion, housing 100 also comprises the lining 130 be arranged in stack shell 110, and stator department 200 is clamped between stage portion and lining 130, and the end of lining 130 contacts with end cap 120.
The power of pump of the prior art is to be transmitted in the pump housing from the pump housing, thereby is difficult to solve the problem that the pump inner fluid leaks.The present invention has changed the power transmission mode of pump, and the mode that adopts internal electrical magnetic force to produce power is carried out drives impeller, the problem thereby the fluid that has solved pump of the prior art leaks.
As a second aspect of the present invention, a kind of control method that horizontally rotates that lifts by crane thing is provided, comprising: below hanging contact, setting fills the fluid pipeline 4 of (especially, referring to flowable media, such as liquid or gas etc.); Drive the fluid in pipeline 4 to flow, thereby produce an antagonistic force contrary with the flow direction of fluid; Utilize antagonistic force to drive pipeline 4 to rotate around hanging contact, thereby drive suspended object to rotate in horizontal surface.
Preferably, by controlling mobile acceleration/accel and the direction of fluid, control the size and Orientation of antagonistic force.
Preferably, use pump 5 drive fluid that are arranged on pipeline 4 to flow; Utilize the motion of Frequency Converter Control pump 5 to control mobile acceleration/accel and the direction of fluid.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a lifting appliance comprises: steel rope (1) and suspender (2), it is characterized in that, and described lifting appliance also comprises:
Horizontal turning adjusting device (3), described steel rope (1) and described horizontal turning adjusting device (3) hang and connect by hanging contact, and described suspender (2) is connected to the below of described horizontal turning adjusting device (3);
Described horizontal turning adjusting device (3) rotates in horizontal surface around the described contact that hangs under the driving due to the mobile antagonistic force produced of fluid, to drive described suspender (2), in horizontal surface, rotates.
2. lifting appliance according to claim 1, it is characterized in that, described horizontal turning adjusting device (3) comprises annular pipeline (4), pump (5) is installed on described pipeline (4), described pipeline is contained with described fluid in (4), described fluid under the driving of described pump (5) at described pipeline (4) thus in flow and to produce described antagonistic force.
3. lifting appliance according to claim 2, is characterized in that, described lifting appliance also comprises:
Controller, for by controlling acceleration/accel and the direction of described pump (5) rotation, control the size and Orientation of described antagonistic force.
4. lifting appliance according to claim 3, is characterized in that, described lifting appliance also comprises:
Variable-frequency motor, be electrically connected to described pump (5) and described controller, for the described pump of the order-driven according to described controller (5).
5. lifting appliance according to claim 3, is characterized in that, described lifting appliance also comprises:
Handling device, be electrically connected to described controller, for sending for controlling the control signal of described acceleration/accel and described direction to described controller.
6. according to the described lifting appliance of claim 1 to 5, it is characterized in that, described handling device comprises: three-postion switch is electrically connected to described controller, for generating the control signal of controlling described direction.
7. according to the described lifting appliance of claim 1 to 6, it is characterized in that, described lifting appliance also comprises:
Auxiliary lifting appliance (6), be positioned at the below of described suspender (2), and be connected with described suspender (2).
8. the control method that horizontally rotates that lifts by crane thing, is characterized in that, comprising:
Below hanging contact, the pipeline (4) that fills fluid is set;
Drive the fluid in described pipeline (4) to flow, thereby produce an antagonistic force contrary with the flow direction of described fluid;
Utilize described antagonistic force to drive described pipeline (4) to rotate around the described contact that hangs, thereby drive suspended object to rotate in horizontal surface.
9. the control method that horizontally rotates according to claim 8, is characterized in that, by controlling the mobile acceleration/accel of described fluid and direction, controls the size and Orientation of described antagonistic force.
10. the control method that horizontally rotates according to claim 9, is characterized in that,
The pump (5) that use is arranged on described pipeline (4) drives described fluid to flow;
Utilize the motion of the described pump of Frequency Converter Control (5) to control the mobile acceleration/accel of described fluid and direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310380211 CN103449299A (en) | 2013-08-27 | 2013-08-27 | Horizontally rotatable regulating method of hoisting equipment and hoisted objects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201310380211 CN103449299A (en) | 2013-08-27 | 2013-08-27 | Horizontally rotatable regulating method of hoisting equipment and hoisted objects |
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| Publication Number | Publication Date |
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| CN103449299A true CN103449299A (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201310380211 Pending CN103449299A (en) | 2013-08-27 | 2013-08-27 | Horizontally rotatable regulating method of hoisting equipment and hoisted objects |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108298431A (en) * | 2018-01-09 | 2018-07-20 | 蒋安绍 | A kind of natural gas line placement hanging device |
| CN112299249A (en) * | 2020-10-26 | 2021-02-02 | 中国一冶集团有限公司 | Auxiliary device for hoisting overhanging steel truss and using method |
-
2013
- 2013-08-27 CN CN 201310380211 patent/CN103449299A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108298431A (en) * | 2018-01-09 | 2018-07-20 | 蒋安绍 | A kind of natural gas line placement hanging device |
| CN112299249A (en) * | 2020-10-26 | 2021-02-02 | 中国一冶集团有限公司 | Auxiliary device for hoisting overhanging steel truss and using method |
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Application publication date: 20131218 |
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