Hoisting crane cooperates off-centre to lift method with raising legs
Technical field
The present invention relates to a kind of hanging method, especially a kind of hoisting crane cooperates off-centre to lift method with raising legs.
Background technology
In some checking maintenance equipment, because the basis of equipment is high, peripheral obstacle is many; The place is narrow; The hoisting crane erect-position is limited, and the available goliath in camp site and surrounding area is few, uses existing crane combined lifting; For example the unit master hangs, two-shipper lifts, unit or two-shipper slip tail and hang and can't accomplish lifting operation, so the said equipment has proposed new technical requirements to hoisting technology.
Summary of the invention
The objective of the invention is to propose a kind of hoisting crane and cooperate off-centre to lift method with raising legs, this method can be used for that Equipment Foundations height, peripheral obstacle are many, the working environment of hoisting crane erect-position difficulty, hoisting process safety and stability, lifting cost-effective.
The present invention is that the technical scheme below adopting realizes: a kind of hoisting crane cooperates off-centre to lift method with raising legs, and wherein this method may further comprise the steps:
(1) makes raising legs: according to the lifting ability of hoisting crane, carry out stressed load sharing and calculate, confirm the position of main suspension centre and slide tail suspension centre, calculate the lifting ability of raising legs, the design raising legs;
(2) raising legs is set: a pair of raising legs is erected near the position equipment installing base respectively; Two raising legss are symmetrical set about the equipment installing base center, and the top of raising legs is provided with main hanging pulley group, and main hanging pulley group is connected with winch through running rope; The top of raising legs is connected with cable rope simultaneously; The other end of cable rope is connected with anchor point, through cable rope raising legs is carried out sealing, and the line of centers line of raising legs is with respect to the equipment installing base disalignment;
(3) main hanger is installed and is slipped the tail hanger: main hanger is adopted and is slipped the tail hanger and all adopts the tubular type hanger; Two main hangers are arranged on the equipment upper end and are and are symmetrical set; Two slide tail hangers are arranged on the skirt lower end and are and are symmetrical set; The line of centres of main hanger with slip the line of centres of tail hanger and all be parallel to the equipment radial centre lines, main hanger, slide tail hanger all are provided with respect to the longitudinal center line of equipment is eccentric, and main hanger, slide tail hanger lay respectively at the both sides of equipment longitudinal center line;
(4) put saddle: saddle is put in the dead ahead in equipment installing base, the line of centres of saddle and the central lines of equipment installing base;
(5) put equipment: adopt the separate unit hoisting crane that equipment integral is put to saddle, equipment skirt bottom exceeds the holding-down bolt 200-300mm of equipment installing base, and the horizontal projection of the two raising legs lines of centres and the two slide tail hanger lines of centres is on same straight line;
(6) equipment is in place: hoisting crane hanging device head, and raising legs hanging device afterbody, hoisting crane and raising legs are with the equipment integral hoisted in position: at first; Hoisting crane and raising legs slowly promote simultaneously, equipment level is lifted, when reach rise to specified altitude assignment after; Raising legs stops to promote, and hoisting crane is to the walking of equipment installing base direction, in the walking process then; The hoisting crane rope of having argued for the sake of arguing makes the equipment revolution upright, last hoisting crane and raising legs slowly falling simultaneously; Equipment is steadily fallen on the basis, equipment location, foot bolt tightly; Equipment, is promoted to erect and slips tail and lift effect to upright process by horizontal, in the upright process in place of equipment, promotes the effect of lifting of erecting.
Among the present invention, the rope that rises that the raising legs winch is passed through in the lifting of said raising legs and falling reaching back the rope realization, and a rope of raising legs winch reaching back rope and being crawl.
Said equipment is by in the horizontal extremely upright process, and the hoisting crane speed of travel is steadily slow, and the hoisting speed of its hoisting speed and raising legs is consistent.
In the upright process in place of said equipment, the falling speed of hoisting crane and raising legs is consistent.
The invention has the beneficial effects as follows: cooperate off-centre to lift method with raising legs through hoisting crane; Realized the lifting work in working environments such as Equipment Foundations are high, peripheral obstacle is many, hoisting crane erect-position difficulty; Can make the accurate hoisted in position of equipment; The hoisting process safety and stability is practiced thrift hoisting cost.
Description of drawings
Fig. 1 is an equipment master hanger scheme of installation;
Fig. 2 is the birds-eye view of Fig. 1;
Fig. 3 is this equipment slide tail hanger scheme of installation;
Fig. 4 is the birds-eye view of Fig. 3;
Fig. 5 is the structural representation of main hanger, eccentric hanger eccentric throw;
Fig. 6 is the structural representation of raising legs.
Among the figure: 1-master's hanger; 2-slide tail hanger; Plane, 3-plant bottom case bottom; The 4-primary branch; The 5-girder; 6,6 ', 6 "-connecting panel; 7,7 '-diagonal brace; 8,8 '-horizontal shore; Hanger is hung by 9-homophony polyspast system; 10-raising legs sealing hanger; The 11-base plate.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further specified.
The present invention proposes a kind of hoisting crane and cooperate off-centre to lift method with raising legs, this method may further comprise the steps:
The first step is made raising legs.According to the lifting ability of hoisting crane, carry out stressed load sharing and calculate, confirm the position of main suspension centre and slide tail suspension centre, calculate the lifting ability of raising legs, the design raising legs.
In second step, raising legs is set.A pair of raising legs is erected near the position equipment installing base respectively, and two raising legss are symmetrical set about the equipment installing base center; Raising legs is according to the mast principle design: the top of raising legs is provided with main hanging pulley group; Main hanging pulley group is connected with winch through running rope; The top of raising legs is connected with cable rope simultaneously, and the other end of cable rope is connected with anchor point, through cable rope raising legs is carried out sealing; The line of centers line of raising legs is with respect to the equipment installing base disalignment, and its deviant is confirmed according to the lifting parameter of equipment and the lifting ability of hoisting crane.
In the 3rd step, main hanger is installed and is slipped the tail hanger.Main hanger is adopted and is slipped the tail hanger and all adopts the tubular type hanger; Two main hangers are arranged on the equipment upper end and are and are symmetrical set; Two slide tail hangers are arranged on the skirt lower end and are and are symmetrical set; Like Fig. 1 to shown in Figure 4, the line of centres a of main hanger with slip the line of centres c of tail hanger and all be parallel to equipment radial centre lines b, and the line of centres a of main hanger, the line of centres c of tail hanger of slipping all are provided with respect to the equipment center line is eccentric.
In order to guarantee the reasonable distribution of lifting load in the hoisting process; The orientation that is provided with of hanger must be accurate; The orientation deterministic process of hanger suspension centre is described below: equipment as shown in Figure 5 is horizontal; Main hanger 1, the tail hanger 2 that slips all are provided with respect to the longitudinal center line d of equipment is eccentric, and main hanger 1, the tail hanger 2 that slips lay respectively at the both sides of equipment longitudinal center line d, and the distance between main hanger 1 and the equipment longitudinal center line d is that promptly the eccentric throw of main hanger 1 is A1; It is A2 that the distance between tail hanger 2 and the equipment longitudinal center line d of slipping is promptly slipped the eccentric throw of tail hanger 2, and the numerical value of A1 and A2 is set according to the principle of moment balance reasonable distribution; Main simultaneously hanger 1, slip tail hanger 2 all with respect to the eccentric setting of the radial centre lines b of equipment; Main hanger 1, the tail hanger 2 that slips lay respectively at the both sides of equipment radial centre lines b; Distance between main hanger 1 and the equipment radial centre lines b is that promptly the eccentric throw of main hanger 1 is L1; It is L2 that the distance between tail hanger 2 and the equipment radial centre lines b of slipping is promptly slipped the eccentric throw of tail hanger 2, and the numerical value of L1 and L2 is set according to the principle of moment balance reasonable distribution.After confirming the position of centre of gravity O of equipment, the position of main hanger 1 can be accurately confirmed, the position of eccentric hanger 2 can be accurately confirmed based on A2 and L2 based on A1 and L1 value.
In the 4th step, put saddle.Saddle is put in dead ahead in equipment installing base, and saddle is provided with two at least, the line of centres of saddle and the central lines of equipment installing base.
In the 5th step, put equipment.Adopt the separate unit hoisting crane that equipment integral is put to saddle, equipment skirt bottom exceeds the holding-down bolt 200-300mm of equipment installing base, and the horizontal projection of the two raising legs lines of centres and the two slide tail hanger lines of centres is on same straight line.
The 6th step, equipment in place.Hoisting crane hanging device head, raising legs hanging device afterbody, hoisting crane and raising legs are with the equipment integral hoisted in position: at first; Hoisting crane and raising legs slowly promote simultaneously, and equipment level is lifted, rise to specified altitude assignment after; Raising legs stops to promote, and hoisting crane is to the walking of equipment installing base direction, in the walking process then; The hoisting crane rope of having argued for the sake of arguing makes the equipment revolution upright, last hoisting crane and raising legs slowly falling simultaneously; Equipment is steadily fallen on the basis, equipment location,, made equipment in place foot bolt tightly.Equipment, is promoted to erect and slips tail and lift effect to upright process by horizontal, in the upright process in place of equipment, promotes the effect of lifting of erecting.
In the hoisting process, the lifting of raising legs and falling are that the rope that rises through the raising legs winch reach back rope and realizes, and the playing rope and time restrict and be crawl of winch.The hoisting crane walking is wanted steadily slowly; The lifting of hoisting crane and the speed of falling are slow; And be consistent with the lifting and the falling speed of raising legs winch, guarantee the lifting of hoisting crane and raising legs and fall after rise synchronously that the equipment holding-down bolt of making can penetrate smoothly; Accomplish whole lifting operation smoothly, guarantee the security and stability of whole hoisting process simultaneously.
The raising legs that uses in the said method is as shown in Figure 6; Described raising legs comprises winch, main Hanging roller group, main Hanging roller group hanger 9 and primary branch 4; Be provided with two symmetrically arranged primary branches 4 in each raising legs; Primary branch 4 is skewed, and the distance between two primary branches 4 reduces from the bottom to top gradually.Captive joint with girder 5 in the top of two primary branches 4, its bottom is respectively equipped with base plate 11, and primary branch 4 fixes on the ground through base plate 11.In order to improve the stability of raising legs, be connected with two horizontal shores 8 and 8 ' between two primary branches 4, horizontal shore 8 and the 8 ' short transverse along raising legs are provided with at interval.Captive joint with primary branch 4 through connecting panel 6 ' in the two ends that are positioned at the horizontal shore 8 of below; And interconnect through being symmetrically arranged diagonal brace 7 between this support beam and the primary branch 4; The connecting panel 6 that the upper end of two diagonal braces 7 is provided with support beam 8 bottom end faces middle parts respectively " to captive joint, captive joint with primary branch 4 through connecting panel 6 in the lower end.Directly captive joint with primary branch 4 in the two ends that are positioned at the horizontal shore 8 ' of top; The middle part of this support beam bottom end face also is provided with connecting panel 6 "; the connecting panel 6 at the upper end of diagonal brace 7 ' and horizontal shore 8 ' middle part " captive joint; The lower end is connected with the connecting panel 6 ' at lower horizontal support beam 8 two ends, and two diagonal braces 7 ' are also for being symmetrical set.The lateral surface of girder 5 its length directions of upper edge is provided with a plurality of raising legs sealing hangers 10, and an end of cable rope is connected with anchor point, and the other end is connected with raising legs sealing hanger 10, thereby has played the effect of sealing raising legs.Simultaneously; It is to hang hanger 9 that girder 5 is provided with main hanging pulley group; Main hanging pulley group is to hang hanger 9 to be connected with main Hanging roller group, and described main Hanging roller group comprises running block and fixed pulley group, and wherein direct the and main hanging pulley group of fixed pulley group system extension hanger 9 is connected; Running block is connected with equipment, and winch is connected with main Hanging roller group through running rope.Make steel rope play rope or time rope during winch work, and drive main Hanging roller group action, thereby make raising legs realize promoting or falling.
It is to hang hanger 9 with main hanging pulley group that the top of said raising legs also can not be provided with raising legs sealing hanger 10.
Among the present invention, said horizontal shore also can only be provided with one, perhaps is provided with more than two, and mainly according to the lifting parameter determining of equipment, the height of raising legs is high more under the same structure, and its lifting ability is more little.Described connecting panel 6,6 ' and 6 " can be used as independent member and captive joint with primary branch 4 or horizontal shore, also can be integral structure with primary branch 4 or horizontal shore.Described primary branch, diagonal brace and horizontal shore can be integral structure.The said described structure of present embodiment that is not limited to is so long as all drop in protection scope of the present invention according to the raising legs structure of mast lifting principle setting.