CN109650272B - Mast hoisting device - Google Patents
Mast hoisting device Download PDFInfo
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- CN109650272B CN109650272B CN201811615469.0A CN201811615469A CN109650272B CN 109650272 B CN109650272 B CN 109650272B CN 201811615469 A CN201811615469 A CN 201811615469A CN 109650272 B CN109650272 B CN 109650272B
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- mast
- hoisting
- main
- main mast
- free end
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- 238000004804 winding Methods 0.000 claims description 29
- 239000000725 suspension Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/68—Jibs foldable or otherwise adjustable in configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention provides a mast hoisting device, which belongs to the technical field of cranes and comprises a main mast, a hoisting mast, hoisting equipment and a fixed base; the main mast is arranged on the fixed base through the rotary seat, a guy rope used for keeping the main mast upright and stable is arranged at the top of the main mast, the hoisting mast is hinged to the main mast, the hoisting equipment is arranged on the main mast, the hoisting end of the hoisting equipment bypasses the free end of the hoisting mast and is arranged in a suspension mode, and a variable amplitude steel wire rope used for changing the angle between the hoisting mast and the main mast is further arranged on the main mast. The mast hoisting device can be arranged at different positions according to different conditions, so that the mast hoisting device can hoist a heavy object to a position exceeding the hoisting height of the mast hoisting device, and the mast hoisting device is more convenient to use.
Description
Technical Field
The invention relates to the field of cranes, in particular to a mast hoisting device.
Background
The mast crane is a fixedly installed crane and has the characteristics of simple structure, easy design and manufacture, low cost, easy disassembly and assembly, small self weight, large capacity and the like. Mast cranes are generally used in places such as wharfs, ports, mines, etc., where components are heavy, hoisting projects are concentrated, and construction sites are narrow; however, the mast crane in the prior art can only be installed on the ground generally, and the height of the lifting weight is limited by the structure of the mast crane, so that the existing mast crane can only lift the weight to a certain height; for example, the hoisting height of some hoisting devices is only 30m, and when the required hoisting height exceeds 30m, the hoisting device cannot complete the hoisting operation, and in order to complete the hoisting operation, hoisting equipment capable of meeting the hoisting height needs to be selected again, so that the working time and the use cost of the equipment are correspondingly increased.
Disclosure of Invention
The invention provides a mast hoisting device, aiming at solving the technical problem that the height requirement of a mast crane in the prior art, which cannot finish hoisting due to the limitation of the structure of the mast crane, exceeds the hoisting height of the mast crane.
The invention is realized by the following steps:
a mast hoisting device comprises a main mast (1), a hoisting mast (2), hoisting equipment and a fixed base (3); wherein,
a rotary seat (4) is arranged on the fixed base (3), the main mast (1) is arranged on the fixed base (3) through the rotary seat (4), a cable wind rope (5) for keeping the main mast (1) upright and stable is arranged at the top of the main mast (1), the hoisting mast (2) is hinged on the main mast (1), the hoisting equipment is arranged on the main mast (1), the hoisting end of the hoisting equipment is arranged in a suspended manner by bypassing the free end of the hoisting mast (2), and a variable amplitude steel wire rope (6) for changing the angle between the hoisting mast (2) and the main mast (1) is further arranged on the main mast (1);
the hoisting equipment comprises a winding device (10) and a hook (11), wherein the winding device (10) is arranged on the main mast (1), a hoisting steel rope (12) is wound on the winding device (10), the free end of the hoisting steel rope (12) bypasses the free end of the hoisting mast (2) to be arranged in a suspended mode, and the hook (11) is arranged at the free end of the hoisting steel rope (12);
a second fixed pulley (13) used for reducing the friction force between the hoisting steel rope (12) and the hoisting mast (2) is arranged at the free end of the hoisting mast (2), and the free end of the hoisting steel rope (12) bypasses the second fixed pulley (13) to be connected with a hook (11);
the lifting device is characterized by further comprising a supporting cross bar (14) and a movable pulley (15), wherein the supporting cross bar (14) is arranged on the main mast (1), the length direction of the supporting cross bar (14) is perpendicular to that of the main mast (1), the free end of the lifting steel rope (12) sequentially bypasses the second fixed pulley (13) and the movable pulley (15) and is fixedly connected with the supporting cross bar (14), and the hook (11) is hung on the movable pulley (15);
the supporting cross bar (14) is provided with a sliding machine (16) moving along the length direction of the supporting cross bar (14), and the free end of the hoisting steel rope (12) is fixedly arranged on the sliding machine (16).
Preferably, the main mast (1) is further provided with a variable amplitude support arm (7), a first fixed pulley (8) is arranged at the free end of the variable amplitude support arm (7), one end of the variable amplitude steel wire rope (6) is fixed on the main mast (1), and the other end of the variable amplitude steel wire rope (6) bypasses the first fixed pulley (8) to be connected with the hoisting mast (2).
Preferably, the amplitude-variable steel wire rope (6) is fixed on the main mast (1) through a chain block (9).
Preferably, an included angle between the length direction of the main mast (1) and the length direction of the amplitude variation support arm (7) is 60 degrees, and the free end of the amplitude variation support arm (7) is higher than the fixed end of the amplitude variation support arm (7).
Preferably, the winding device (10) is a winch.
Preferably, the wind power generator further comprises a rotating disc (17), the rotating disc (17) is arranged at the top of the main mast (1) in a manner of rotating around the length direction of the main mast (1), and the cable wind rope (5) is arranged on the rotating disc (17).
The invention has the beneficial effects that: according to the mast hoisting device obtained through the design, the mast hoisting device can be arranged at different positions according to different conditions, so that a heavy object can be hoisted to the position exceeding the hoisting height of the mast hoisting device by the mast hoisting device, and the mast hoisting device is more convenient to use.
In addition, the preferable scheme of the invention also has the following technical effects:
(1) according to the preferable scheme, the amplitude-variable steel wire rope is fixed on the main mast through the chain block, and workers can realize amplitude variation of the hoisting mast by pulling the chain block, so that the amplitude variation of the hoisting mast is more accurate, and the process of hoisting a heavy object by the mast hoisting device is more stable.
(2) The mast hoisting device also comprises a movable pulley, and a hoisting steel rope sequentially rounds the second fixed pulley and the movable pulley and is connected with the supporting cross rod.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without creating any labor.
FIG. 1 is a schematic structural diagram of a mast hoisting device of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is a schematic view of a rotating disk of a mast lifting device according to the present invention;
fig. 4 is a schematic structural diagram of a mast hoisting device provided by the third embodiment.
The labels in the figure are respectively:
1. a main mast; 2. a lifting mast; 3. a fixed base; 4. a rotary base; 5. a guy rope; 6. a variable amplitude steel wire rope; 7. a variable amplitude support arm; 8. a first fixed pulley; 9. a chain block; 10. a winding device; 11. hooking; 12. hoisting a steel rope; 13. a second fixed pulley; 14. a support rail; 15. a movable pulley; 16. a sliding machine; 17. and (6) rotating the disc.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example 1, as shown in reference to figures 1 to 3,
a mast hoisting device comprises a main mast 1, a hoisting mast 2, hoisting equipment and a fixed base 3; wherein,
the fixed base 3 is provided with a rotary seat 4, the main mast 1 is arranged on the fixed base 3 through the rotary seat 4, the top of the main mast 1 is provided with a cable rope 5 for keeping the main mast 1 upright and stable, the hoisting mast 2 is hinged on the main mast 1, the hoisting equipment is arranged on the main mast 1, the hoisting end of the hoisting equipment bypasses the free end of the hoisting mast 2 and is arranged in a suspension mode, and the main mast 1 is further provided with a variable amplitude steel wire rope 6 for changing the angle between the hoisting mast 2 and the main mast 1. Through the mast hoisting device with the structure, the mast hoisting device can be arranged at different positions according to different conditions, for example, the hoisting height of the hoisting device is 30m, the required hoisting height needs to reach 60m, at the moment, the hoisting requirement cannot be met when the hoisting device is arranged on the ground, and additional equipment cost is required to be paid when new hoisting equipment is selected again; according to the condition, a worker can arrange one mast lifting and hoisting device on the ground, the mast lifting and hoisting device can hoist a heavy object to a height of 30m, then another mast lifting and hoisting device is arranged on a building of 30m, and the heavy object hoisted to the height of 30m by the mast lifting and hoisting device arranged on the ground can be continuously hoisted to the height of 60m so as to meet the hoisting requirement; the fixing base 3 and the guy rope 5 of the mast hoisting device can effectively ensure the stability of the main mast 1, so that the mast hoisting device is more stable in arrangement.
Furthermore, a plurality of through holes which are convenient for bolts to pass through can be formed in the fixing base 3, when bolt holes or bolts are arranged at the installation position of the mast hoisting device, workers can install the through holes in the fixing base 3 of the mast hoisting device corresponding to the bolt holes or bolts at the installation position, so that the fixing base 3 can be installed at the installation position more stably, and the mast hoisting device is prevented from shaking or collapsing.
Furthermore, the main mast 1 is also provided with a variable amplitude support arm 7, the free end of the variable amplitude support arm 7 is provided with a first fixed pulley 8, one end of the variable amplitude steel wire rope 6 is fixed on the main mast 1, the other end of the variable amplitude steel wire rope 6 is fixed on the lifting mast 2 by bypassing the first fixed pulley 8, and the included angle between the lifting mast 2 and the main mast 1 can be effectively adjusted by winding and unwinding the variable amplitude steel wire rope 6, so that the variable amplitude of the lifting mast 2 is realized; and the staff can adjust the included angle between the lifting mast 2 and the main mast 1 to 0 degree, so that the mast lifting device can also realize the rotation of the main mast 1 in a narrow space, thereby the mast lifting device is more convenient to use.
Furthermore, the first fixed pulley 8 arranged on the amplitude-variable supporting arm 7 can effectively reduce the friction force between the amplitude-variable steel wire rope 6 and the amplitude-variable supporting arm 7, so that the mast hoisting device is more convenient in the amplitude-variable process, and the abrasion of the amplitude-variable steel wire rope 6 can be effectively reduced, so that the service life of the mast hoisting device is prolonged.
Furthermore, the amplitude-variable steel wire rope 6 is fixed on the main mast 1 through a chain block 9;
the hand chain block 9 is also called a fairy block, a chain block, a jack chain, and a hand block, is a hand hoisting machine which is simple to use and convenient to carry, and belongs to the prior art for technical personnel in the field, so the detailed description is omitted.
The amplitude-variable steel wire rope 6 is fixed on the main mast 1 through the chain block 9, so that in the process of operating the mast hoisting device by a worker, the worker can realize the amplitude variation of the mast hoisting device by pulling the chain block 9 (a chain is not shown in the figure), and the amplitude variation of the hoisting mast 2 is more accurate so as to meet the requirement of hoisting the mast hoisting device.
Preferably, the included angle between the length direction of the main mast 1 and the length direction of the amplitude variation support arm 7 is 10-80 degrees, and the height of the free end of the amplitude variation support arm 7 is higher than the height of the connecting end of the amplitude variation support arm and the main mast 1.
More preferably, the included angle between the length direction of the main mast 1 and the length direction of the amplitude-variable support arm 7 is 60 degrees, and the amplitude-variable support arm 7, the main mast 1 and the hoisting mast 2 are positioned in the same vertical plane, so as to reduce other acting forces applied to the amplitude-variable steel wire rope 6.
the device provided by the embodiment of the present invention has the same implementation principle and technical effect as those of the embodiment 1, and for the sake of brief description, reference may be made to the corresponding contents in the embodiment 1 without reference to the embodiment.
The device obtained by the design can basically meet the use requirement of the mast hoisting device, but the designer further improves the device according to the aim of further improving the function of the device.
The lifting equipment comprises a winding device 10 and a hook 11;
wherein, the winding device 10 is wound with a hoisting steel rope 12, and one end of the hoisting steel rope 12 is fixed on the winding device 10, that is, the fixed end of the hoisting steel rope 12 is fixedly connected with the winding device 10, so that the situation that the hoisting steel rope 12 is separated from the winding device 10 to bring about potential safety hazard when the winding device 10 releases the hoisting steel rope 12 is effectively avoided.
The hook 11 is arranged at the free end of the hoisting steel rope 12, and the hook 11 with the free end of the hoisting steel rope 12 bypasses the free end of the hoisting mast 2 and is suspended in the air; when a heavy object needs to be hoisted by using the mast hoisting device, a worker can control the winding device 10 to rotate, so that the winding device 10 slowly releases the hoisting steel rope 12, the free end of the hoisting steel rope 12 moves to the heavy object, and the hook 11 hooks the heavy object; at this time, the worker can change the rotation direction of the winding device 10, so that the winding device 10 slowly retracts the lifting steel rope 12, and in the process of retracting the lifting steel rope 12 by the winding device 10, the hook 11 can lift the heavy object to complete the lifting work.
Preferably, the winding device 10 is a winding machine;
the hoisting machine is a light and small hoisting device which uses a winding drum to wind a steel wire rope or a chain to lift or pull a heavy object, and is also called a winch, the hoisting machine can vertically lift and horizontally or obliquely pull the heavy object, and the hoisting machine is a winding device 10 commonly used in the prior art; the winding and unwinding of the hoisting steel rope 12 can be completed through the winding device 10.
Furthermore, a second fixed pulley 13 is arranged at the free end of the hoisting mast 2, and the free end of the hoisting steel rope 12 can be connected with the hook 11 by bypassing the second fixed pulley 13; the second fixed pulley 13 can effectively reduce the friction between the hoisting steel cable 12 and the free end of the hoisting mast 2, thereby reducing the abrasion of the hoisting steel cable 12 and prolonging the service life of the hoisting steel cable 12.
the embodiment provides a mast lifting device with another structure, which is a further improvement of the mast lifting device in the above embodiments 1 and 2; the mast hoisting device also comprises a movable pulley 15 and a support cross bar 14, the support cross bar 14 is connected with the main mast 1, the length direction of the support cross bar 14 is vertical to the length direction of the main mast 1, the hook 11 is hoisted on the movable pulley 15, and the free end of the hoisting steel rope 12 sequentially rounds the second fixed pulley 13 and the movable pulley 15 and is fixedly connected with the support cross bar 14; due to the arrangement of the movable pulley 15, when the mast hoisting device hoists a heavy object, the winding process of the winding device 10 is easier, so that the mast hoisting device can hoist the heavy object.
Further, the support rail 14 is provided with a sliding mechanism 16 sliding along the length direction thereof, and the free end of the hoisting rope 12 is fixedly provided to the sliding mechanism 16.
Further, the mast hoisting device further comprises a rotating disc 17, the rotating disc 17 is rotatably arranged at the top of the main mast 1, and the guy rope 5 is fixedly connected to the rotating disc 17, so that in the process that the main mast 1 rotates along with the rotary seat 4, the fixed end of the guy rope 5 cannot be changed in position due to the rotation of the main mast 1, the guy rope 5 can better fix the main mast 1, and the main mast 1 is prevented from shaking or collapsing.
The rotating disk 17 is provided on the main mast 1 to rotate around the longitudinal direction of the main mast 1.
Furthermore, the rotating disc 17 is a disc-shaped structure, a rotating device is arranged at the center of the circle of the rotating disc 17, a rotating shaft is arranged at the top of the main mast 1, and the rotating disc 17 is rotatably arranged on the rotating shaft through the rotating device, so that the rotating disc 17 can rotate on the main mast 1 around the rotating shaft.
Preferably, the rotating device is a bearing, and the rotating disc 17 is rotatably disposed on the rotating shaft through the bearing, so that the rotating disc 17 can rotate more flexibly.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A mast hoisting device is characterized by comprising a main mast (1), a hoisting mast (2), hoisting equipment and a fixed base (3); wherein,
a rotary seat (4) is arranged on the fixed base (3), the main mast (1) is arranged on the fixed base (3) through the rotary seat (4), a cable wind rope (5) for keeping the main mast (1) upright and stable is arranged at the top of the main mast (1), the hoisting mast (2) is hinged on the main mast (1), the hoisting equipment is arranged on the main mast (1), the hoisting end of the hoisting equipment is arranged in a suspended manner by bypassing the free end of the hoisting mast (2), and a variable amplitude steel wire rope (6) for changing the angle between the hoisting mast (2) and the main mast (1) is further arranged on the main mast (1);
the hoisting equipment comprises a winding device (10) and a hook (11), wherein the winding device (10) is arranged on the main mast (1), a hoisting steel rope (12) is wound on the winding device (10), the free end of the hoisting steel rope (12) bypasses the free end of the hoisting mast (2) to be arranged in a suspended mode, and the hook (11) is arranged at the free end of the hoisting steel rope (12);
a second fixed pulley (13) used for reducing the friction force between the hoisting steel rope (12) and the hoisting mast (2) is arranged at the free end of the hoisting mast (2), and the free end of the hoisting steel rope (12) bypasses the second fixed pulley (13) to be connected with a hook (11);
the lifting device is characterized by further comprising a supporting cross bar (14) and a movable pulley (15), wherein the supporting cross bar (14) is arranged on the main mast (1), the length direction of the supporting cross bar (14) is perpendicular to that of the main mast (1), the free end of the lifting steel rope (12) sequentially bypasses the second fixed pulley (13) and the movable pulley (15) and is fixedly connected with the supporting cross bar (14), and the hook (11) is hung on the movable pulley (15);
the supporting cross bar (14) is provided with a sliding machine (16) moving along the length direction of the supporting cross bar (14), and the free end of the hoisting steel rope (12) is fixedly arranged on the sliding machine (16).
2. A mast hoisting device according to claim 1, wherein the main mast (1) is further provided with a luffing jib (7), a first fixed pulley (8) is arranged at a free end of the luffing jib (7), one end of the luffing steel wire rope (6) is fixed on the main mast (1), and the other end of the luffing steel wire rope (6) bypasses the first fixed pulley (8) and is connected with the hoisting mast (2).
3. Mast hoisting device according to claim 2, characterized in that the luffing wire rope (6) is fixed to the main mast (1) by means of a chain block (9).
4. A mast hoisting device according to claim 3, characterized in that the angle between the length direction of the main mast (1) and the length direction of the luffing jib (7) is 60 °, and the free end of the luffing jib (7) is higher than the fixed end of the luffing jib (7).
5. Mast hoisting device according to claim 4, characterized in that the winding device (10) is a winch.
6. A mast hoisting device according to claim 1, further comprising a rotating disc (17), the rotating disc (17) being rotatably arranged on top of the main mast (1) about the length of the main mast (1), the guy rope (5) being arranged on the rotating disc (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811615469.0A CN109650272B (en) | 2018-12-27 | 2018-12-27 | Mast hoisting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811615469.0A CN109650272B (en) | 2018-12-27 | 2018-12-27 | Mast hoisting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109650272A CN109650272A (en) | 2019-04-19 |
| CN109650272B true CN109650272B (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811615469.0A Expired - Fee Related CN109650272B (en) | 2018-12-27 | 2018-12-27 | Mast hoisting device |
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| Country | Link |
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| CN (1) | CN109650272B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114575601A (en) * | 2022-03-16 | 2022-06-03 | 中铁二十局集团第一工程有限公司 | Method for installing net rack |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6502590A (en) * | 1964-04-09 | 1965-10-11 | ||
| CN201372168Y (en) * | 2009-01-22 | 2009-12-30 | 福建省第二电力建设公司 | Mast top pulley device of mast crane |
| CN103241660A (en) * | 2013-05-06 | 2013-08-14 | 苏州金牛精密机械有限公司 | Cantilever cable with adjustable height |
| CN203529796U (en) * | 2013-10-17 | 2014-04-09 | 上海市安装工程集团有限公司 | Hoisting device |
| CN203558756U (en) * | 2013-11-25 | 2014-04-23 | 无锡起岸重工机械有限公司 | All-directional manual lift crane for ship |
| CN204873610U (en) * | 2015-08-31 | 2015-12-16 | 三峡大学 | Formula derrick is pulled to fibre |
| CN206955491U (en) * | 2017-07-26 | 2018-02-02 | 歌山建设集团有限公司 | A kind of precast floor slab handling apparatus |
-
2018
- 2018-12-27 CN CN201811615469.0A patent/CN109650272B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6502590A (en) * | 1964-04-09 | 1965-10-11 | ||
| CN201372168Y (en) * | 2009-01-22 | 2009-12-30 | 福建省第二电力建设公司 | Mast top pulley device of mast crane |
| CN103241660A (en) * | 2013-05-06 | 2013-08-14 | 苏州金牛精密机械有限公司 | Cantilever cable with adjustable height |
| CN203529796U (en) * | 2013-10-17 | 2014-04-09 | 上海市安装工程集团有限公司 | Hoisting device |
| CN203558756U (en) * | 2013-11-25 | 2014-04-23 | 无锡起岸重工机械有限公司 | All-directional manual lift crane for ship |
| CN204873610U (en) * | 2015-08-31 | 2015-12-16 | 三峡大学 | Formula derrick is pulled to fibre |
| CN206955491U (en) * | 2017-07-26 | 2018-02-02 | 歌山建设集团有限公司 | A kind of precast floor slab handling apparatus |
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| CN109650272A (en) | 2019-04-19 |
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