CN113651230A

CN113651230A - Lifting device and method capable of adjusting spacing

Info

Publication number: CN113651230A
Application number: CN202110881675.1A
Authority: CN
Inventors: 林森; 贺卫华; 蒙云盛; 孔桂清; 何忠伟
Original assignee: Pacific Marine Engineering Zhoushan Co ltd
Current assignee: Pacific Marine Engineering Zhoushan Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2021-11-16
Anticipated expiration: 2041-08-02
Also published as: CN113651230B

Abstract

The invention discloses a lifting device with adjustable spacing and a method thereof, aiming at solving the defect that the expected effect cannot be achieved due to uneven stress of a lifting beam when a heavy object is lifted by the lifting device. The lifting device comprises a lifting seat, a lifting beam arranged on the lifting seat, a plurality of upper pulleys, a plurality of lower pulleys and a lifting rope, wherein the plurality of upper pulleys, the plurality of lower pulleys and the lifting rope are arranged on the lifting beam along the length direction, the plurality of pulley mounting holes for mounting the upper pulleys are arranged on the lifting beam, the upper pulleys and the pulley mounting holes are detachably connected, the number of the pulley mounting holes is more than that of the upper pulleys, the lifting rope winds all the upper pulleys and the lower pulleys, the two ends of the lifting rope are respectively connected to the two ends of the lifting beam, and the lifting hook is arranged on the lower pulley. The hoisting device can disperse stress when hoisting a heavy object, the stress is uniform, the stress position can be adjusted according to different structures, and the hoisting requirements of different structures are met.

Description

Lifting device and method capable of adjusting spacing

Technical Field

The invention relates to a hoisting technology, in particular to a hoisting device with adjustable spacing and a method.

Background

At present, the weight of a single total section of a large ocean engineering structure is 300-500 tons, and in some cases, even nearly thousands of tons, and the arrangement of the hoisting points needs to consider not only the performance of a crane, but also the local strength and rigidity of the structure. In order to ensure the lifting safety of the structure, the lifting design process is generally inclined to a principle of small-ton lifting points and distributed arrangement, and the purpose can be achieved by using the lifting beam or the lifting bar. However, the conventional hanging beam or hanging row only disperses the stress through the steel beam and is influenced by the gravity center position of the hung object, and the stress of the common hanging row or hanging beam is not uniform, so that the expected effect cannot be achieved sometimes.

Disclosure of Invention

In order to overcome the defects, the invention provides the lifting device with the adjustable interval and the method, the stress can be dispersed and uniform when the heavy object is lifted, and the stress position can be adjusted according to different structures, so that the lifting requirements of different structures are met.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides an adjustable interval's hoisting apparatus, includes the lifting seat, install the hanging beam on the lifting seat, install a plurality of top pulleys on the hanging beam, a plurality of bottom pulleys, lifting rope, is equipped with a plurality of pulley mounting holes that are used for installing the top pulley on the hanging beam along length direction, and top pulley and pulley mounting hole can dismantle the connection, and pulley mounting hole quantity is more than top pulley quantity, and all top pulleys and bottom pulleys are walked around to the lifting rope, and the both ends of lifting rope are connected respectively at the hanging beam both ends, install the lifting hook on the bottom pulley.

When the structure is hoisted, a plurality of hoisting points corresponding to the lifting hooks are set on the structure, and hoisting ropes are respectively connected between the lifting hooks and the hoisting points. The upper pulleys form fixed pulleys, the lower pulleys form movable pulleys, and the plurality of upper pulleys are arranged on the hanging beam to disperse the gravity of the structure. The number of the pulley mounting holes arranged on the hanging beam is equal to the number of the upper pulleys, so that the mounting position of the upper pulleys can be adjusted, and the hanging beam can be adjusted to a balance position when different structures are hoisted. The hoisting device can disperse stress when hoisting a heavy object, the stress is uniform, the stress position can be adjusted according to different structures, and the hoisting requirements of different structures are met.

Preferably, the lower positions of the two ends of the hanging beam are provided with supporting feet, and the two ends of the hanging beam can be supported on the supporting feet. In the hoisting preparation stage and the lifting beam balance adjusting stage, the supporting legs support the lifting beam, so that the operation is convenient.

Preferably, a pin shaft is arranged in the middle of the hanging beam, the pin shaft is rotatably connected to the hanging seat, adjusting grooves are formed in the two ends of the hanging beam, adjusting blocks capable of moving transversely are arranged in the adjusting grooves, and the two ends of the lifting rope are respectively connected to the two adjusting blocks; the lifting support columns are mounted on two sides of the pin shaft on the lifting seat, and the lifting beam can be supported on the support columns.

The middle part of the hanging beam is rotatably arranged on the hanging seat through a pin shaft, so that the stress balance of the left side and the right side of the hanging beam can be conveniently adjusted, and the structural damage caused by overlarge local stress is avoided. When the hanging beam is unbalanced, the adjusting block at the declination end moves towards the direction close to the middle of the hanging beam, so that the leveling of the hanging beam is facilitated. And in the leveling stage of the hanging beam, the supporting columns are in a movable state and can be lifted, and when the hanging beam is balanced, the supporting columns are locked and cannot be lifted, so that the supporting columns can stably support the hanging beam.

Preferably, the lifting seat and the support column are correspondingly provided with an oil cylinder, the lower end of the support column is installed in the oil cylinder in an adaptive mode, a return spring is installed in the oil cylinder and abuts against the support column, the oil cylinder is communicated with an oil delivery pipe, and the oil delivery pipe is provided with an electromagnetic valve.

In the leveling stage of the hanging beam, the electromagnetic valve is in an open state, the supporting column is in a movable state and can be lifted, the lower end of the supporting column moves in the oil cylinder, and oil can be conveyed in the oil conveying pipe; when the hanging beam is balanced, the electromagnetic valve is closed to cut off the transmission of oil, and the supporting column is locked and cannot lift, so that the supporting column can stably support the hanging beam.

Preferably, push rods are mounted on two sides of the pin shaft on the lifting seat, leveling push blocks capable of moving transversely are arranged on the lifting beam and correspond to the push rods, pushing faces obliquely arranged are arranged on the leveling push blocks, the upper ends of the push rods are attached to the pushing faces, and the two leveling push blocks are respectively connected with the two adjusting blocks.

If the hanging beam is not balanced, the hanging beam is automatically leveled, the heavier side of the hanging beam declines, the leveling push block corresponding to the declination side is pushed by the push rod, and therefore the adjusting block at the declination side is pushed towards the direction close to the middle of the hanging beam, and the hanging beam is automatically leveled.

Preferably, a connecting rod is connected between the leveling push block and the adjusting block, a ratchet bar is arranged on the connecting rod, a pawl is installed on the hanging beam, the end part of the pawl is inserted between two adjacent ratchet teeth of the ratchet bar in a matching mode, and a positioning spring is installed between the leveling push block and the hanging beam.

In the automatic leveling process of the hanging beam, the leveling push block is pushed by the ejector rod, the adjusting block is driven to move through the connecting rod, the ratchet bar can slide over the pawl at the moment, and the positioning spring plays a positioning role and is beneficial to stable movement of the adjusting block. When the hanging beam is leveled in place, the end part of the pawl is inserted between two adjacent ratchets of the ratchet bar to position the adjusting block.

Preferably, the pawl is connected with a shifting lever for shifting the pawl to rotate. The pawl is driven to rotate by the deflector rod, so that the pawl is separated from the ratchet bar, and the return of the adjusting block and the leveling push block is facilitated.

Preferably, the upper end of the ejector rod is provided with a roller, and the roller is attached to the ejector surface. The arrangement of the roller is beneficial to reducing the friction force in the pushing process, and the pushing is more stable and reliable.

Preferably, the lifting base is provided with two extension parts extending downwards, the extension parts are provided with supporting blocks, the supporting column and the ejector rod on one side of the pin shaft are arranged on one supporting block, and the supporting column and the ejector rod on the other side of the pin shaft are arranged on the other supporting block. The arrangement of the extension part is convenient for the installation of the supporting column and the ejector rod.

A lifting method of a lifting device with adjustable spacing is used for lifting a structure by utilizing the lifting device with adjustable spacing, and comprises the following steps:

a. determining hoisting points, mounting the upper pulley on pulley mounting holes at proper positions according to the shape of a structure, determining a plurality of hoisting points corresponding to the lifting hooks on the structure, and respectively connecting hoisting ropes between the lifting hooks and the hoisting points;

b. c, trial hoisting, wherein the crane is connected to the hoisting base to trial hoist the whole hoisting device, the supporting column can be lifted up and down at the moment, whether the hoisting beam is balanced or not is observed, and if the hoisting beam is balanced, the step c is carried out; if the hanging beam is not balanced, the hanging beam is automatically leveled, the heavier side of the hanging beam declines, the leveling push block corresponding to the declination side is pushed by the push rod, so that the adjusting block at the declination side is pushed towards the middle direction close to the hanging beam, the hanging beam is automatically leveled, and if the hanging beam can be adjusted to a balance position at the moment, the step c is carried out; if the hanging beam cannot be balanced after automatic leveling, performing the step d;

c. normally hoisting, locking the support columns, hoisting the whole hoisting device by a crane to hoist the structure to a specified position;

d. and c, balancing the hanging beam, putting down the whole hoisting device by the crane, returning the adjusting block and the leveling push block, adjusting the mounting position of the upper pulley according to the inclined state of the hanging beam during test hoisting, and repeating the step b until the hanging beam is adjusted to the balance position.

The leveling operation of the hanging beam is convenient, when the stress difference of the left side and the right side of the hanging beam is large, the balance degree of the hanging beam is roughly adjusted by adjusting the mounting position of the upper pulley, and then the automatic leveling of the hanging beam is carried out. When the hanging beam is automatically leveled, the heavier side of the hanging beam declines, the leveling push block corresponding to the declination side is pushed by the push rod, so that the adjusting block at the declination side is pushed towards the direction close to the middle of the hanging beam, and the hanging beam is automatically leveled. The leveling mode that the two combine together levels the hanging beam, and the leveling operation of hanging beam is more convenient, and the leveling effect is good.

Compared with the prior art, the invention has the beneficial effects that: (1) the hoisting device can disperse stress when hoisting heavy objects, the stress is uniform, and the stress position can be adjusted according to different structures, so that the hoisting requirements of different structures are met; (2) the balance degree of the hanging beam is convenient to adjust, and the leveling effect is good.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the present invention;

in the figure: 1. the lifting device comprises a lifting seat, 2, a lifting beam, 3, an upper pulley, 4, a lower pulley, 5, a lifting rope, 6, a pulley mounting hole, 7, a lifting hook, 8, a supporting foot, 9, a pin shaft, 10, an adjusting groove, 11, an adjusting block, 12, a supporting column, 13, an oil cylinder, 14, a return spring, 15, an oil conveying pipe, 16, an electromagnetic valve, 17, a push rod, 18, a leveling push block, 19, a push surface, 20, a connecting rod, 21, a ratchet bar, 22, a pawl, 23, a positioning spring, 24, a deflector rod, 25, a roller, 26, an extending part, 27, a supporting block, 28, a sliding groove, 29, a lifting head, 30 and an operation platform.

Detailed Description

The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:

example (b): the utility model provides a hoisting apparatus of adjustable interval (see attached figure 1, attached figure 2), including lifting seat 1, install the hanging beam 2 on lifting seat, install a plurality of top pulleys 3 on the hanging beam, a plurality of bottom pulleys 4, lifting rope 5, be equipped with a plurality of pulley mounting holes 6 that are used for installing the top pulley on the hanging beam along length direction, top pulley and pulley mounting hole can dismantle the connection, pulley mounting hole quantity is more than top pulley quantity, the lifting rope walks around all top pulleys and bottom pulleys, and the both ends of lifting rope are connected respectively at the hanging beam both ends, install lifting hook 7 on the bottom pulley.

The upper pulley is a fixed pulley, and the lower pulley is a movable pulley. An upper pulley is arranged between two adjacent lower pulleys. Supporting feet 8 are arranged below the two ends of the hanging beam, and the two ends of the hanging beam can be supported on the supporting feet. A pin shaft 9 is arranged in the middle of the hanging beam, the pin shaft is rotationally connected to the hanging seat, adjusting grooves 10 are formed in the two ends of the hanging beam, adjusting blocks 11 capable of moving transversely are arranged in the adjusting grooves, and the two ends of the lifting rope are respectively connected to the two adjusting blocks; the lifting support columns 12 are mounted on two sides of the pin shaft on the lifting seat, and the lifting beam can be supported on the support columns. The upper pulleys on the left side and the right side of the hanging beam are symmetrically arranged. The lifting rope alternately passes around the lower pulley and the upper pulley.

The lifting seat and the supporting column are correspondingly provided with an oil cylinder 13, the lower end of the supporting column is installed in the oil cylinder in an adaptive mode, a return spring 14 is installed in the oil cylinder and abuts against the supporting column, the oil cylinder is communicated with an oil conveying pipe 15, and the oil conveying pipe is provided with an electromagnetic valve 16. The oil tank is arranged on the hoisting seat, and the oil delivery pipe is communicated with the oil tank. The two sides of the pin shaft on the lifting seat are both provided with ejector rods 17, the lifting beam and the ejector rods are correspondingly provided with leveling push blocks 18 capable of moving transversely, the leveling push blocks are provided with obliquely arranged ejector faces 19, the upper ends of the ejector rods are attached to the ejector faces, and the two leveling push blocks are respectively connected with the two adjusting blocks. A connecting rod 20 is connected between the leveling push block and the adjusting block, a ratchet bar 21 is arranged on the connecting rod, a pawl 22 is arranged on the hanging beam, the end part of the pawl is inserted between two adjacent ratchet teeth of the ratchet bar in a matching way, and a positioning spring 23 is arranged between the leveling push block and the hanging beam. The pawl is connected with a shifting lever 24 for shifting the pawl to rotate. And a pawl spring and a butting column are respectively installed on two sides of the pawl on the hanging beam, the pawl spring is butted on the pawl, and the pawl is butted on the butting column. The upper end of the ejector rod is provided with a roller 25, and the roller is attached to the ejector surface. The lifting seat is provided with two extending parts 26 extending downwards, the extending parts are provided with supporting blocks 27, the supporting column and the ejector rod on one side of the pin shaft are arranged on one supporting block, and the supporting column and the ejector rod on the other side of the pin shaft are arranged on the other supporting block. The hanging beam and the leveling push block are correspondingly provided with sliding grooves 28, the leveling push block and the sliding grooves are connected in a sliding mode, and the positioning springs are installed in the sliding grooves. The upper end of the lifting seat is provided with a lifting head 29, the lifting seat is provided with an operation platform 30, and the edge of the operation platform is provided with a protective guard.

b. c, trial hoisting, wherein a hoisting machine is connected to the hoisting base to trial hoist the whole hoisting device, the electromagnetic valve is opened at the moment, the oil conveying pipe can convey oil, the support column can be lifted up and down, whether the hoisting beam is balanced or not is observed, and if the hoisting beam is balanced, the step c is carried out; if the hanging beam is not balanced, the hanging beam is automatically leveled, the heavier side of the hanging beam declines, the leveling push block corresponding to the declination side is pushed by the push rod, so that the adjusting block at the declination side is pushed towards the middle direction close to the hanging beam, the hanging beam is automatically leveled, and if the hanging beam can be adjusted to a balance position at the moment, the step c is carried out; if the hanging beam cannot be balanced after automatic leveling, performing the step d;

c. normally hoisting, closing the electromagnetic valve, blocking the oil conveying pipe, locking the supporting column, and hoisting the whole hoisting device to a specified position by the crane;

The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.

Claims

1. The utility model provides an adjustable interval's hoisting apparatus, characterized by, including lifting by crane the seat, install the hanging beam on lifting by crane the seat, install a plurality of top pulleys on the hanging beam, a plurality of bottom pulleys, lifting rope, be equipped with a plurality of pulley mounting holes that are used for installing the top pulley on the hanging beam along length direction, top pulley and pulley mounting hole can dismantle the connection, pulley mounting hole quantity is more than top pulley quantity, all top pulleys and bottom pulleys are walked around to the lifting rope, and the both ends of lifting rope are connected respectively at the hanging beam both ends, install the lifting hook on the bottom pulley.

2. An adjustable spacing crane assembly as claimed in claim 1, wherein support feet are provided at positions below the ends of the beam, the ends of the beam being supportable on the support feet.

3. The lifting device with adjustable spacing as claimed in claim 1, wherein a pin is mounted in the middle of the lifting beam, the pin is rotatably connected to the lifting base, adjusting grooves are formed in both ends of the lifting beam, adjusting blocks capable of moving transversely are mounted in the adjusting grooves, and both ends of the lifting rope are respectively connected to the two adjusting blocks; the lifting support columns are mounted on two sides of the pin shaft on the lifting seat, and the lifting beam can be supported on the support columns.

4. The lifting device with the adjustable interval as claimed in claim 3, wherein the lifting seat is correspondingly provided with an oil cylinder with a support pillar, the lower end of the support pillar is arranged in the oil cylinder in a matching manner, a return spring is arranged in the oil cylinder and abuts against the support pillar, the oil cylinder is communicated with an oil delivery pipe, and the oil delivery pipe is provided with an electromagnetic valve.

5. The adjustable-spacing hoisting device as claimed in claim 3, wherein the lifting base is provided with a pin shaft, the pin shaft is provided with two push rods on both sides, the lifting beam is provided with a leveling push block capable of moving transversely corresponding to the push rods, the leveling push block is provided with an obliquely arranged push surface, the upper end of the push rod is abutted with the push surface, and the two leveling push blocks are respectively connected with the two adjusting blocks.

6. The hoisting device with the adjustable interval as claimed in claim 5, wherein a connecting rod is connected between the leveling push block and the adjusting block, a ratchet bar is arranged on the connecting rod, a pawl is arranged on the hanging beam, the end of the pawl is inserted between two adjacent ratchet teeth of the ratchet bar in a matching manner, and a positioning spring is arranged between the leveling push block and the hanging beam.

7. The adjustable clearance lifting apparatus of claim 6, wherein the pawl is coupled to a lever for rotating the pawl.

8. An adjustable pitch hoist as claimed in claim 5, wherein the push rod has rollers mounted on its upper end, the rollers engaging the push surface.

9. An adjustable spacing crane assembly as claimed in claim 5, wherein the lifting base has two downwardly extending extensions with support blocks, the support post and the ejector pin on one side of the pin are mounted on one support block and the support post and the ejector pin on the other side of the pin are mounted on the other support block.

10. A method for lifting a structure using the adjustable-pitch lifting apparatus as claimed in any one of claims 5 to 9, comprising the steps of: