CN115893227A - Crane and hoisting process - Google Patents
Crane and hoisting process Download PDFInfo
- Publication number
- CN115893227A CN115893227A CN202211532293.9A CN202211532293A CN115893227A CN 115893227 A CN115893227 A CN 115893227A CN 202211532293 A CN202211532293 A CN 202211532293A CN 115893227 A CN115893227 A CN 115893227A
- Authority
- CN
- China
- Prior art keywords
- hoisting
- mast
- luffing
- crane
- rotary table
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Jib Cranes (AREA)
Abstract
The invention belongs to the technical field of engineering machinery, and particularly relates to a crane and a hoisting process, wherein the crane comprises a rotary table and an arm support hinged to the head end of the rotary table, and the arm support is used for hoisting a large load; the amplitude-changing mechanism comprises an amplitude-changing steel wire rope connected with the mast and a rope collecting component arranged on the rotary table, and the rope collecting component is used for adjusting the included angle between the mast and the rotary table by collecting and collecting the amplitude-changing steel wire rope. According to the invention, the first balance counterweight is hoisted at the top end of the mast, so that the tensile force borne by the variable-amplitude steel wire rope is reduced, the limit of the bearable tensile force of the variable-amplitude steel wire rope on the performance of the crane is removed, and under the condition that the bearable tensile force of the variable-amplitude steel wire rope is not changed, the original hoisting limit can be broken through by the crane, and the hoisting requirement of larger weight can be met.
Description
Technical Field
The invention belongs to the technical field of engineering machinery, and particularly relates to a crane and a hoisting process.
Background
The traditional crawler crane is provided with a mounting point of a self-loading and unloading oil cylinder at the top of a mast, and the mounting point is used for self-loading and unloading of parts such as a crawler frame and the like after the oil cylinder is mounted. After the self-loading and self-unloading arm lifting is completed, the oil cylinder is integrally placed along with the mast, and other functions are not set. Along with the continuous development of the hoisting industry, the components for construction and installation are larger and heavier, the hoisting equipment still cannot meet part of hoisting requirements after breaking through the limit in all aspects, and most of the reasons are that enough hoisting performance cannot be achieved due to the limitation of the stability of the rack and the stress of the amplitude-variable steel wire rope, and based on the current situation, the purposes of increasing the balancing weight and improving the selection grade of the amplitude-variable steel wire rope are achieved.
Disclosure of Invention
The invention mainly aims to provide a crane and a crane, and aims to solve the technical problem that the hoisting performance of the crane cannot meet the requirement in the prior art due to low stability of the crane and large stress of a variable-amplitude steel wire rope.
In order to achieve the above object, the present invention provides a crane, including a rotary table and an arm support hinged to a head end of the rotary table, wherein the arm support is used for hoisting a large load, and the crane further includes:
the mast hoisting assembly comprises a mast, the bottom end of the mast is hinged with the rotary table, and the top end of the mast is connected with the top end of the arm support through a pulling plate and is used for hoisting the first balance weight; the luffing mechanism comprises a luffing steel wire rope connected with the mast and a rope collecting component arranged on the rotary table, and the rope collecting component is used for adjusting the included angle between the mast and the rotary table by collecting and collecting the luffing steel wire rope.
In the embodiment of the invention, the mast hoisting assembly further comprises an auxiliary hoisting oil cylinder, one end of the auxiliary hoisting oil cylinder is hinged with the top end of the mast, and the other end of the auxiliary hoisting oil cylinder is used for hoisting the crawler frame or the first balance weight.
In the embodiment of the invention, the tail end of the rotary table is provided with the second balance weight, and the second balance weight is matched with the first balance weight and used for balancing the moment of the large load on the crane.
In the embodiment of the invention, one end of the mast, which is far away from the rotary table, is provided with a pulley shaft and an amplitude-variable pulley block arranged on the pulley shaft, the rope-collecting component comprises an amplitude-variable winding drum arranged at the tail part of the rotary table and an amplitude-variable winch arranged on the rotary table, the amplitude-variable steel wire rope is wound between the amplitude-variable winding drum and the amplitude-variable pulley block for multiple times in parallel, and the amplitude-variable winch is used for collecting and releasing the amplitude-variable steel wire rope.
In the embodiment of the invention, the mast comprises two rod bodies which are arranged at intervals, two ends of the pulley shaft penetrate through the two rod bodies and extend out of the two rod bodies, the two ends of the pulley shaft are provided with detachable limiting plates, the limiting plates are used for preventing the pulley shaft from axially falling off the mast, and the amplitude variation pulley block is arranged between the two rod bodies.
In the embodiment of the invention, the mast hoisting assembly further comprises an adapter plate connected with the auxiliary hoisting oil cylinder and the pulley shaft, wherein the first end of the adapter plate is hinged with the auxiliary hoisting oil cylinder, and the second end of the adapter plate is provided with a connecting hole spliced with the pulley shaft.
In the embodiment of the invention, the number of the auxiliary hoisting oil cylinders is two, and the two auxiliary hoisting oil cylinders are respectively arranged at the outer sides of the two rod bodies and are connected with the pulley shaft.
In an embodiment of the invention, the mast hoisting assembly further comprises a first spacer bush and a second spacer bush which are sleeved on the pulley shaft, the first spacer bush is clamped between the limiting plate and the adapter plate, the second spacer bush is clamped between the adapter plate and the mast, and the first spacer bush and the second spacer bush can be matched with the limiting adapter plate to move along the axial direction of the pulley shaft.
In the embodiment of the invention, the number of the auxiliary hoisting oil cylinders is one, the auxiliary hoisting oil cylinders are connected to the pulley shafts, and the number of the variable amplitude pulley blocks is two and the variable amplitude pulley blocks are arranged at intervals to form an avoiding space for the auxiliary hoisting oil cylinders to swing.
In an embodiment of the present invention, a hoisting process of a crane is further provided, which is applied to the crane, and the hoisting process of the crane includes the steps of:
s10: rotating the mast to enable the auxiliary hoisting oil cylinder to move to the head end of the rotary table, hoisting the crawler frame and installing the crawler frame on two sides of the rack;
s20: the head end of the rotary table is provided with an arm support, the included angle between the arm support and the rotary table is adjusted through a luffing mechanism, and the auxiliary hoisting oil cylinder is rotated to the tail end of the rotary table;
s30: mounting a second balance weight at the tail end of the rotary table, and hoisting the first balance weight on the auxiliary hoisting oil cylinder;
s40: and hoisting the large load on the arm support so that the first balance weight and the second balance weight are matched to balance the large load.
Through the technical scheme, the crane provided by the embodiment of the invention has the following beneficial effects:
according to the invention, the first balance weight is hoisted at the top end of the mast, so that the first balance weight applies a moment in the same direction as that of the amplitude-variable steel wire rope to the mast through the self gravity, the tension required for stabilizing the mast is effectively shared by the amplitude-variable steel wire rope, the tension borne by the amplitude-variable steel wire rope is reduced, the limitation of the amplitude-variable steel wire rope in the bearable tension to the performance of the crane is removed, and under the condition that the amplitude-variable steel wire rope is unchanged in the bearable tension, the crane can break through the original hoisting limit, and the hoisting requirement of larger weight is met. The first balance weight can improve the stress of the variable-amplitude steel wire rope, and can increase the moment balance effect on the crane on the basis of the main weight so as to improve the overall stability of the crane. In addition, the first balance counter weight does not need to be installed on the rotary table, and compared with the method that the weight of the main counter weight is directly increased on the rotary table, the gravity of the main counter weight, which needs to be borne by the rotary table, is reduced, and the structural rigidity and the manufacturing cost needed by the rotary table are reduced.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a crane for hoisting a large load according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a crane lifting a track frame according to an embodiment of the invention;
figure 3 is a schematic structural view of a mast hoist assembly according to a first embodiment of the invention;
FIG. 4 is an enlarged view at A in FIG. 3;
figure 5 is a schematic view of a mast hoist assembly according to a second embodiment of the invention.
Description of the reference numerals
| Reference numerals | Name (R) | Reference numerals | Name(s) |
| 10 | Rotary table | 11 | |
| 20 | |
12 | |
| 30 | Auxiliary hoisting |
23 | |
| 41 | Amplitude-variable |
24 | |
| 42 | |
25 | |
| 43 | Amplitude- |
26 | |
| 21 | Pulley |
50 | |
| 22 | Variable- |
51 | |
| 31 | |
14 | |
| 13 | |
70 | |
| 80 | |
81 | Lifting steel wire rope |
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
A crane according to the invention is described below with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment of the present invention, a crane is provided, which includes a rotary table 10 and an arm support 50 hinged to a head end of the rotary table 10, wherein the arm support 50 is used for hoisting a large load 80, the crane further includes a mast hoisting assembly and a luffing mechanism, the mast hoisting assembly includes a mast 20, a bottom end of the mast 20 is hinged to the rotary table 10, and a top end is connected to a top end of the arm support 50 through a pulling plate 51 and is used for hoisting a first balance weight 13; the luffing mechanism comprises a luffing steel wire rope 41 connected with the mast 20 and a rope collecting component arranged on the rotary table 10, and the rope collecting component is used for adjusting the included angle between the mast 20 and the rotary table 10 by collecting and collecting the luffing steel wire rope 41.
In the crane, the large load 80 is hoisted through a hoisting winch, the arm support 50 and a hoisting steel wire rope 81, the hoisting winch is installed on the rotary table 10, one end of the hoisting steel wire rope 81 is connected with the hoisting winch, the other end of the hoisting steel wire rope 81 bypasses the top end of the arm support 50 and is connected with the large load 80, the hoisting winch controls the large load 80 to rise and fall through retracting the hoisting steel wire rope 81, in the process, the large load 80 continuously exerts torque on the arm support 50, and further, the torque is exerted on the mast 20 connected with the arm support 50 through the pulling plate 51.
When the rope retracting assembly adjusts the included angle between the mast 20 and the rotary table 10 by retracting the luffing steel wire rope 41 to be in the state shown in fig. 1, the top end of the mast 20 is connected with the top end of the arm support 50 through the pulling plate 51, and at the moment, the moment applied to the top end of the mast 20 by the luffing steel wire rope 41 needs to be balanced with the moment applied to the mast 20 by the large load 80, so that the mast 20 and the whole crane can reach a balanced state.
As can be seen from the above, the luffing steel wire rope 41 needs to have enough tension on the mast 20 to realize torque balance with the large load 80, so the hoisting performance and the maximum hoisting weight of the crane are limited by the magnitude of the tension that the luffing steel wire rope 41 can bear. According to the crane, the first balance weight 13 is hoisted at the top end of the mast 20, the first balance weight 13 exerts a moment on the mast 20 in the same direction as the luffing steel wire rope 41 through the gravity of the first balance weight 13, the tensile force required for balancing the mast 20 is effectively shared by the luffing steel wire rope 41, the limit of the bearable tensile force of the luffing steel wire rope 41 on the performance of the crane is removed, the original hoisting limit of the crane can be broken through, and the hoisting requirement of larger weight is met.
In the embodiment of the present invention, the mast hoisting assembly further includes an auxiliary hoisting cylinder 30, one end of the auxiliary hoisting cylinder 30 is hinged to the top end of the mast 20, the other end of the auxiliary hoisting cylinder 30 is connected to hoist the crawler frame 12 or the first balance weight 13, and the auxiliary hoisting cylinder 30 selects to hoist the crawler frame 12 or the first balance weight 13 according to two different working conditions as shown in fig. 1 and fig. 2.
Specifically, in the state that the crane shown in fig. 2 is installed again after unloading, the auxiliary hoisting cylinder 30 is used for hoisting the crawler frame 12, and supporting the jacking leg cylinder 70 on the frame 11 to the ground, the frame 11 can be suspended by jacking the leg cylinder 70, the angle of the mast 20 is adjusted by the luffing mechanism, and the height of the crawler frame 12 is adjusted by the auxiliary hoisting cylinder 30, so that the crawler frame 12 can be installed on the frame 11 in a butt joint manner when the crane is displaced to the installation position on the frame 11, and finally the connection between the crawler frame 12 and the auxiliary hoisting cylinder 30 is disconnected. It should be noted that after the track frame 12 is installed, the auxiliary hoisting cylinder 30 may be used to hoist other components of the crane.
The crane in fig. 1 is in a state of hoisting a large load 80, the top end of the mast 20 is turned to the tail end of the rotary table 10 through the luffing mechanism, the auxiliary hoisting oil cylinder 30 vertically droops and hoists the first balance weight 13, the first balance weight 13 comprises a counterweight block storage assembly and a plurality of counterweight blocks which are stacked on the counterweight block storage assembly, and when hoisting operation is performed, the number of the counterweight blocks can be selected according to actual operation requirements so as to achieve the best balance effect. The large load 80 is connected to the crane through a hoisting steel wire rope 81, the pulling plate 51 is connected to the top ends of the mast 20 structure and the arm support 50, the arm support 50 is subjected to the acting force transmitted by the large load 80, part of the acting force is transmitted to the amplitude variation steel wire rope 41 through the pulling plate 51, the first balance counterweight 13 is hoisted through the auxiliary hoisting oil cylinder 30, the stress of the amplitude variation steel wire rope 41 can be improved, the stability of a host machine is synchronously enhanced, and the hoisting performance of the crane is obviously improved.
In addition, the tail end of the rotary table 10 is provided with a second balance weight 14, the second balance weight 14 is matched with the first balance weight 13 and used for balancing the moment of the large load 80 to the crane, wherein the second balance weight 14 at the tail end of the rotary table 10 is a main balance weight, the first balance weight 13 is an auxiliary balance weight, the first balance weight 13 not only can improve the stress of the luffing steel wire rope 41, but also can increase the moment balance effect to the crane on the basis of the main balance weight, compared with the situation that the weight of the main balance weight is directly increased on the rotary table 10, the gravity of the main balance weight required to be born by the rotary table 10 is slowed down, and the structural rigidity and the manufacturing cost required by the rotary table 10 are reduced.
When the weight of the large load 80 is insufficient or no large load 80 exists, the weight of the front part of the crane is insufficient, the stability of the whole crane is likely to be insufficient, and the crane can tip backwards, and the first balance weight 13 and the auxiliary hoisting oil cylinder 30 can be detached and separated quickly due to the fact that the mounting position of the additional first balance weight 13 is low, so that the weight of the rear end of the crane is reduced, and the safety of the whole crane is guaranteed.
In the embodiment of the invention, as shown in fig. 2 and 3, one end of the mast 20, which is far away from the turntable 10, is provided with a pulley shaft 21 and a luffing pulley block 22 mounted on the pulley shaft 21, the rope reeling assembly comprises a luffing drum 43 mounted at the tail of the turntable 10 and a luffing winch 42 mounted on the turntable 10, the luffing steel wire rope 41 is wound between the luffing drum 43 and the luffing pulley block 22 in parallel for many times, and the luffing winch 42 is used for reeling and unreeling the luffing steel wire rope 41. When the crane is in the state shown in fig. 2, the luffing winch 42 can continuously recover the luffing wire rope 41, so that the total length of the luffing wire rope 41 wound between the luffing drum 43 and the luffing pulley block 22 is reduced, and further the luffing wire rope 41 continuously draws close to the distance between the top end of the mast 20 and the luffing drum 43, thereby changing the included angle between the mast 20 and the turntable 10. In the process, the amplitude variation pulley block 22 is used for enabling the amplitude variation steel wire rope 41 to be wound and connected between the amplitude variation winding drum 43 and the amplitude variation pulley block 22 for multiple times in parallel, so that the pulling force of the amplitude variation steel wire rope 41 on the mast 20 can be optimized and amplified, the pulling force required by the amplitude variation winch 42 in rope take-up is reduced, and the problem that the pulling force of the amplitude variation winch 42 in rope take-up is insufficient is effectively solved.
In the embodiment of the present invention, as shown in fig. 3, the mast 20 includes two spaced rods 23, two ends of the pulley shaft 21 extend through the two rods 23 and are provided with detachable limiting plates 24, because the radius of the limiting plates 24 is larger than that of the pulley shaft 21, the limiting plates 24 cannot freely extend through the rods 23, so that the limiting plates 24 can be used to prevent the pulley shaft 21 from axially falling off the mast 20, and the luffing pulley block 22 is disposed between the two rods 23. Wherein, the amplitude-variable steel wire rope 41 is wound between the amplitude-variable winding drum 43 and the amplitude-variable pulley block 22 for a plurality of times in parallel and forms a plate-shaped structure.
The auxiliary hoisting oil cylinder 30 is connected with the pulley shaft 21 through the adapter plate 31 and can freely rotate along the axis of the pulley shaft 21, because in the actual work, the model of the auxiliary hoisting oil cylinder 30 is often not matched with the pulley shaft 21, so the adapter plate 31 used for connecting the auxiliary hoisting oil cylinder 30 and the pulley shaft 21 is additionally arranged, the first end of the adapter plate 31 is hinged with the auxiliary hoisting oil cylinder 30, the second end of the adapter plate 31 is provided with a connecting hole spliced with the pulley shaft 21, two ends of the adapter plate 31 are respectively matched with the auxiliary hoisting oil cylinder 30 and the pulley shaft 21, the auxiliary hoisting oil cylinder 30 and the pulley shaft 21 which are not originally matched are successfully connected together.
It should be noted that, because the amplitude-variable steel wire rope 41 is wound around the amplitude-variable winding drum 43 and the amplitude-variable pulley block 22 in parallel for a plurality of times and forms a plate-shaped structure, the rotation plane of the auxiliary hoisting cylinder 30 is perpendicular to the axial direction of the pulley shaft 21, so that the auxiliary hoisting cylinder 30 is always spaced from the plate-shaped structure formed by the amplitude-variable steel wire rope 41, and the motions of the two are independent and do not interfere with each other.
The number of the auxiliary hoisting oil cylinders 30 can be freely set as required, and can be one or two.
In the first embodiment of the present application, as shown in fig. 3, the number of the auxiliary hoisting cylinders 30 is two, and the two auxiliary hoisting cylinders 30 are respectively disposed at the outer sides of the two rod bodies 23 and connected to the pulley shaft 21. The mast hoisting assembly further comprises a first spacer 25 and a second spacer 26 which are sleeved on the pulley shaft 21, the first spacer 25 is clamped between the limiting plate 24 and the adapter plate 31, the second spacer 26 is clamped between the adapter plate 31 and the mast 20, and the first spacer 25 and the second spacer 26 can be matched with the limiting adapter plate 31 to move along the axis direction of the pulley shaft 21, so that the auxiliary hoisting oil cylinder 30 on the adapter plate 31 is limited to move along the axis direction of the pulley shaft 21, the stability of the auxiliary hoisting oil cylinder 30 is improved, and the function of the auxiliary hoisting oil cylinder 30 in hoisting the track frame 12 and the first balance weight 13 is optimized.
At this time, the specific steps of installing the auxiliary hoisting cylinder 30 on the mast 20 are as follows: firstly, the pulley shaft 21 is inserted into the mast 20 and the luffing pulley block 22, and the two ends of the pulley shaft 21 can extend out of the rod bodies 23 at the two ends of the mast 20, then as shown in fig. 4, the second spacer 26, the adapter plate 31, the first spacer 25 and the limiting plate 24 are sequentially installed at the two ends of the pulley shaft 21 extending out of the rod bodies 23, and finally the auxiliary hoisting cylinder 30 is connected with the adapter plate 31.
In the second embodiment of the present application, as shown in fig. 5, when the number of the auxiliary hoisting cylinders 30 is one, the luffing cylinder is installed at the center of the pulley shaft 21, the number of the luffing pulley blocks 22 is two, and the two luffing pulley blocks 22 are arranged at intervals to form an avoidance space for the auxiliary hoisting cylinders 30 to swing. In order to ensure that the auxiliary hoisting cylinder 30 can swing smoothly, the width of the avoiding space is larger than the outer diameter of the auxiliary hoisting cylinder 30, so that the auxiliary hoisting cylinder 30 can smoothly pass through the avoiding space. The auxiliary hoisting cylinder 30 is connected to the pulley shaft 21 via an adapter plate 31.
When the crane is changed from the state shown in fig. 2 to the state shown in fig. 1, the auxiliary hoisting oil cylinder 30 is prevented from generating displacement interference with the luffing steel wire rope 41 wound around the luffing pulley block 22 for many times, the auxiliary hoisting oil cylinder 30 is ensured to be smoothly suspended at the tail end of the rotary table 10, so that the work of hoisting the first balance weight 13 is normally completed, the conversion from the function of hoisting the crawler frame 12 to the function of hoisting the first balance weight 13 is realized, the same auxiliary hoisting oil cylinder 30 has multiple functions, the functions of the auxiliary hoisting oil cylinder 30 are developed to the maximum extent, and the cost is saved.
In an embodiment of the present invention, a hoisting process of a crane is further provided, which is applied to the crane, and the hoisting process of the crane includes the steps of:
s10: rotating the mast 20 to move the auxiliary hoist cylinder 30 to the head end of the turntable 10 and hoist and mount the crawler frame 12 to both sides of the frame 11;
specifically, the frame 11 is lifted up by the support leg cylinder 70 on the frame 11, the track frame 12 is hoisted at the end of the auxiliary hoisting cylinder 30, the auxiliary hoisting cylinder 30 is controlled to extend and retract to adjust the displacement of the track frame 12 in the height direction, the mast 20 and the turntable 10 are controlled by the luffing mechanism to displace the track frame 12 in the horizontal direction, and finally the track frame 12 is moved to the installation position on the frame 11, so that the installation work of the track frame 12 connected with the frame 11 can be performed, and the connection between the track frame 12 and the auxiliary hoisting cylinder 30 can be disconnected after the track frame 12 is installed. The process can enable the track frame 12 to automatically move to the installation position on the rack 11, simplifies the step of butting the rack 11 in the installation process of the track frame 12, avoids the use of other complex machines or workers to carry the track frame 12, and saves a large amount of manpower, material resources and financial resources. The hoisting operation of the rest parts on the crane is also roughly as described in the above process, and the detailed description is omitted here.
S20: installing an arm support 50 at the head end of the rotary table 10, adjusting an included angle between the arm support 50 and the rotary table 10 through an amplitude-varying mechanism, and enabling the auxiliary hoisting oil cylinder 30 to rotate to the tail end of the rotary table 10;
specifically, the boom 50 is hinged to the rotary table 10, two ends of the pull plate 51 are respectively connected to the boom 50 and the mast 20, and the luffing steel wire rope 41 is retracted and extended through the rope retracting assembly to adjust the included angle between the mast 20 and the boom 50 and the rotary table 10. In the process, the pulling plate 51 is used for establishing transmission connection between the mast 20 and the arm support 50, so that the mast 20 and the arm support 50 can be pulled simultaneously when the rope withdrawing assembly withdraws the steel wire rope, the mast 20 is used as a middle force transmission component, the pulling force required for pulling the arm support 50 is reduced, the amplitude-variable steel wire rope 41 does not need to be wound and connected between the amplitude-variable winding drum 43 with a long distance and the arm support 50 for multiple times, the required length of the steel wire rope is reduced, and the cost is obviously reduced.
S30: a second balance weight 14 is arranged at the tail end of the rotary table 10, and a first balance weight 13 is hoisted on the auxiliary hoisting oil cylinder 30;
s40: and hoisting the large load 80 on the arm support 50, so that the first balance weight 13 and the second balance weight 14 are matched to balance the large load 80.
According to the invention, the first balance weight 13 is additionally arranged at the top of the mast 20, so that the tensile force required by balancing the mast 20 is effectively shared by the amplitude-variable steel wire rope 41, the limit of the bearable tensile force of the amplitude-variable steel wire rope 41 on the performance of the crane is removed, the original hoisting limit can be broken through by the crane, and the hoisting requirement of larger weight can be met. And the auxiliary hoisting oil cylinder 30 can convert the function of hoisting the track frame 12 into the function of hoisting the first balance weight 13, so that the same auxiliary hoisting oil cylinder 30 has a plurality of functions, and the functions of the auxiliary hoisting oil cylinder 30 are developed to the maximum extent.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited 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; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. 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 description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A crane comprising a turntable (10) and an arm support (50) hinged to a head end of the turntable (10), the arm support (50) being for hoisting a large load (80), characterized in that the crane further comprises:
the mast hoisting assembly comprises a mast (20), the bottom end of the mast (20) is hinged with the rotary table (10), and the top end of the mast hoisting assembly is connected with the top end of the arm support (50) through a pulling plate (51) and is used for hoisting a first balance weight (13);
the luffing mechanism comprises a luffing steel wire rope (41) connected with the mast (20) and a rope winding assembly arranged on the rotary table (10), and the rope winding assembly is used for adjusting the included angle between the mast (20) and the rotary table (10) by winding and unwinding the luffing steel wire rope (41).
2. The crane according to claim 1, wherein the mast hoisting assembly further comprises an auxiliary hoisting cylinder (30), one end of the auxiliary hoisting cylinder (30) is hinged to the top end of the mast (20), and the other end is used for hoisting the crawler frame (12) or the first balance weight (13).
3. Crane according to claim 1, wherein the rear end of the turntable (10) is provided with a second counterweight (14), the second counterweight (14) and the first counterweight (13) cooperating and serving to balance the moment of the large load (80) on the crane.
4. The crane according to claim 1, wherein a pulley shaft (21) and a luffing pulley block (22) mounted on the pulley shaft (21) are arranged at one end of the mast (20) far away from the turntable (10), the rope reeling assembly comprises a luffing drum (43) mounted at the tail of the turntable (10) and a luffing winch (42) mounted on the turntable (10), the luffing steel wire rope (41) is wound between the luffing drum (43) and the luffing pulley block (22) in parallel for multiple times, and the luffing winch (42) is used for reeling and unreeling the luffing steel wire rope (41).
5. A crane according to claim 4, characterized in that the mast (20) comprises two spaced apart rod bodies (23), the pulley shaft (21) extends through the two rod bodies (23) at both ends and is provided with a removable retainer plate (24), the retainer plate (24) is used for preventing the pulley shaft (21) from axially falling out of the mast (20), and the luffing pulley block (22) is arranged between the two rod bodies (23).
6. The crane according to claim 5, wherein the mast hoisting assembly further comprises an adapter plate (31) connecting the auxiliary hoisting cylinder (30) and the pulley shaft (21), a first end of the adapter plate (31) is hinged to the auxiliary hoisting cylinder (30), and a second end of the adapter plate (31) is provided with a connecting hole inserted into the pulley shaft (21).
7. The crane according to claim 6, wherein the number of the auxiliary hoisting cylinders (30) is two, and the two auxiliary hoisting cylinders (30) are respectively arranged at the outer sides of the two rods (23).
8. The crane according to claim 7, wherein the mast hoisting assembly further comprises a first spacer (25) and a second spacer (26) sleeved on the pulley shaft (21), the first spacer (25) is clamped between the limiting plate (24) and the adapter plate (31), the second spacer (26) is clamped between the adapter plate (31) and the mast (20), and the first spacer (25) and the second spacer (26) can cooperate to limit the movement of the adapter plate (31) along the axis direction of the pulley shaft (21).
9. The crane according to claim 6, wherein the number of the auxiliary hoisting cylinders (30) is one, and the auxiliary hoisting cylinders are connected to the pulley shaft (21), and the number of the luffing pulley blocks (22) is two and are arranged at intervals to form an avoidance space for the auxiliary hoisting cylinders (30) to swing.
10. Hoisting process of a crane, applied to a crane according to any one of claims 1 to 9, comprising the steps of:
s10: rotating the mast (20) to enable the auxiliary hoisting oil cylinder (30) to move to the head end of the rotary table (10), hoisting the crawler frame (12) and installing the crawler frame to two sides of the rack (11);
s20: an arm support (50) is installed at the head end of the rotary table (10), an included angle between the arm support (50) and the rotary table (10) is adjusted through a luffing mechanism, and the auxiliary hoisting oil cylinder (30) is made to rotate to the tail end of the rotary table (10);
s30: a second balance weight (14) is arranged at the tail end of the rotary table (10), and the first balance weight (13) is hoisted on the auxiliary hoisting oil cylinder (30);
s40: hoisting a large load (80) on the boom (50) so that the first balance weight (13) and the second balance weight (14) cooperate to balance the large load (80).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211532293.9A CN115893227A (en) | 2022-12-01 | 2022-12-01 | Crane and hoisting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211532293.9A CN115893227A (en) | 2022-12-01 | 2022-12-01 | Crane and hoisting process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115893227A true CN115893227A (en) | 2023-04-04 |
Family
ID=86475956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211532293.9A Pending CN115893227A (en) | 2022-12-01 | 2022-12-01 | Crane and hoisting process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115893227A (en) |
-
2022
- 2022-12-01 CN CN202211532293.9A patent/CN115893227A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2492235B1 (en) | Method of assembling a mobile lift crane | |
| EP2165964B1 (en) | Mobile crane and method for erecting a crane boom | |
| CN101708809B (en) | Reel frame system used for crane | |
| JP2020019632A (en) | crane | |
| CN115893227A (en) | Crane and hoisting process | |
| US6669038B1 (en) | Self-propelled crane | |
| CN111137796A (en) | Novel jib crane | |
| CN217025112U (en) | Tower crane with nonstandard crane boom | |
| CN214456342U (en) | Integrated super-lifting amplitude changing device for crane | |
| CN202379629U (en) | Super lifting device and crane | |
| CN212315380U (en) | Tower crane mast lifting device | |
| CN214196178U (en) | Construction platform | |
| JP7253918B2 (en) | Crane disassembly structure and method | |
| CN103321202B (en) | An arm method of boom hoisting, dynamic compaction machinery and dynamic compaction machinery | |
| CN219031595U (en) | Counterweight self-loading and unloading device, counterweight system and hoisting machinery | |
| CN102701085B (en) | Hoisting device and crane | |
| CN110606441A (en) | Full-ground crane boom and use method thereof | |
| CN217102835U (en) | Super-lift device, crane boom and operation machine | |
| CN217676528U (en) | Side pulling device for crane and crane comprising same | |
| CN217708670U (en) | Counter weight tray and crane | |
| CN202022657U (en) | Crane and hoisting mechanis thereof | |
| CN218560946U (en) | Hoisting equipment | |
| CN217398314U (en) | Double truss arm and operation machinery | |
| JP7293921B2 (en) | Pin anti-rotation structure | |
| CN218664951U (en) | Hoisting and positioning device for machining of oil filling pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |