CN209938895U

CN209938895U - Crank arm lifting device for removing rust on lower surface of offshore platform

Info

Publication number: CN209938895U
Application number: CN201920060243.2U
Authority: CN
Inventors: 厉伟; 于利民; 彭欣; 高博
Original assignee: Shandong Jiaotong University
Current assignee: Shandong Jiaotong University
Priority date: 2019-01-15
Filing date: 2019-01-15
Publication date: 2020-01-14
Anticipated expiration: 2029-01-15

Abstract

The utility model belongs to the ocean engineering field, concretely relates to crank arm elevating gear for offshore platform lower surface rust cleaning. The utility model utilizes the crank type hydraulic lifting device, the chassis is widened to two sides of the beam, and the four wheels are designed into groove type steel wheels; two manipulators are arranged at the front and the rear of the vehicle body respectively, and a hydraulic clamping device is arranged at the tail end of each manipulator, so that the stability of the device is ensured. The crank arm lifting device can rotate 360 degrees, and the crank arm can be lifted. The tail end of each track is fixed by four semicircular steel hoops, and rubber pads are arranged in the steel hoops to firmly fix the tracks on the cross beam. The design can make the crank arm lifting device have good stability and safety no matter in a working state or a running state, and brings convenience to rust removal operation of workers.

Description

Crank arm lifting device for removing rust on lower surface of offshore platform

Technical Field

The utility model relates to a crank arm elevating gear for surface rust cleaning under offshore platform belongs to the ocean engineering field.

Background

The pile type offshore platform consists of a bearing platform (an upper deck) and a pile foundation, and the surface of the platform is easy to rust in the marine environment and needs to be periodically subjected to rust removal and corrosion prevention. At present, when rust removal and corrosion prevention are carried out on the lower surface of a platform, a large number of scaffolds need to be erected by workers. The scaffold is erected on the sea according to the land standard, and the mode of laying I-steel below a platform and erecting a full scaffold is generally adopted; the difficulty of erection is large, and when the scaffold meets severe sea conditions, the scaffold is often damaged by the impact of sea waves. No matter when the staff works on the operating platform erected by the scaffold or the operating platform is arranged up and down, the actions are not flexible and convenient enough, and certain dangers exist. Until now, no efficient operation method for rust removal and corrosion prevention of the lower surface of the platform exists.

Disclosure of Invention

The technical task of the utility model is to solve the not enough of prior art, provide a crank arm elevating gear that is used for offshore platform lower surface to rust cleaning.

The utility model provides a technical scheme that problem adoption more than it adopts is:

1. design of lifting device

The lifting device adopts crank arm type hydraulic lifting (as shown in figure 1), and uses a diesel engine as power to perform 360-degree rotation operation from supporting legs, self lifting and self walking. The device has the characteristics of simple operation, convenient use, large operation area, especially capability of overhanging operation and capability of carrying out large-range multipoint lifting operation. In order to adapt to the working environment and increase the stability of the lifting device during working, the chassis of the lifting device is widened, and the width of the chassis is extended to two sides of the cross beam; the four wheels are designed into groove-type steel wheels, so that the width of the four wheels is just clamped on the track, and the four wheels are convenient to walk (as shown in figure 4); two manipulators are respectively arranged at the front and the rear of the vehicle body, a hydraulic clamping device is arranged at the tail end of each manipulator, and a lifting device is fixed during operation (as shown in figure 2).

2. Selection and placement of tracks

In order to ensure that the crank arm lifting device can safely run on the rail, the rail needs to have enough strength and hardness. The channel steel is made of standardized carbon structural steel, and the section of the channel steel is groove-shaped. Selecting the proper length of the channel steel according to the length of the platform beam; two parallel tracks are arranged according to the width of wheels at two sides of the lifting device, the tail ends of the tracks are fixed by four semicircular steel hoops, and the tracks are connected with the steel hoops and the steel hoops by bolts (as shown in figure 3).

Compared with the prior art, the utility model produced beneficial effect is:

at present, when rust removal and corrosion prevention are carried out on the lower surface of a platform, a large number of scaffolds need to be erected by workers. The scaffold is erected on the sea according to the land standard, and the mode of laying I-steel below a platform and erecting a full scaffold is generally adopted; the difficulty of erection is large, and when the scaffold meets severe sea conditions, the scaffold is often damaged by the impact of sea waves. No matter when the staff works on the operation platform erected by the scaffold or the upper and lower operation platforms, the actions are not flexible and convenient enough, and certain dangers exist. Aiming at the existing situation, the utility model provides a rust removal device, the method has small operation difficulty coefficient, simple and flexible operation, high safety and can solve the problem of high difficulty in corrosion prevention of the lower surface of the offshore platform; a large amount of manpower and material resources are saved; the operation is flexible and convenient, the working strength is low, and the working time is greatly shortened.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention; FIG. 2 is a schematic structural view of the manipulator in area A of FIG. 1 of the present invention; FIG. 3 is a schematic view of the rail fixing structure in the area B of FIG. 1 of the present invention; fig. 4 is the structural schematic diagram of the groove-type steel wheel clamped in the C region of fig. 1.

The numbering in FIG. 1 is as follows: 1. the device comprises an upright column, 2. a crank arm lifting device, 3. a rotary table, 4. a crank arm, 5. a hanging basket, 6. a platform, 7. a hydraulic rod, 8. a cross beam, 9. a manipulator, 10. a chassis, 11. a steel wheel, 12. a track, A. a manipulator structure, B. a track fixing structure and C. a groove steel wheel track structure.

Reference numerals in FIG. 2 denote: 1. the device comprises connecting

frames

1 and 2, a one-way hydraulic rod, 3, a fixed hinge, 4, connecting

frames

2 and 5, a cylindrical pin, 6, a clamping device, 7, a two-way hydraulic rod, 8, a chassis and 9, a track.

Reference numerals in FIG. 3 denote: 1. steel hoop, 2 rubber pad, 3

bolt

1, 4

bolt

2, 5 crossbeam, 6 track.

Reference numerals in FIG. 4 denote: 1. track, 2 steel wheel.

Detailed Description

The following detailed description of the crank arm lifting device for removing rust on the lower surface of the offshore platform according to the present invention is made with reference to the accompanying drawings.

As shown in fig. 3, two channel steel rail grooves are downwards placed on a circular beam, four bolt holes are formed in the tail end of each rail, and the rails and the beam are fixed through bolts and steel hoops. The size of steel hoop designs for semi-circular according to the size design of crossbeam, has the rubber pad in for increase frictional force, and steel hoop both ends are equipped with the bolt hole, and the upper end passes through the bolt and is connected with the track, and the lower extreme passes through the bolt and is connected with another steel hoop. The two semicircular steel hoops are sleeved on the cross beam and are provided with gaps, the lower ends of the steel hoops are connected through bolts, the two semicircular steel hoops are tightly sleeved on the cross beam in the process of screwing the bolts, the track is firmly fixed on the cross beam, and the safe running of the crank arm lifting device on the track is guaranteed.

As shown in fig. 4, the steel wheel groove is designed according to the section size of the channel steel, so that the channel steel is just clamped on the rail, and the steel wheel can roll on the rail without deflection. The crank arm lifting device provides power through a diesel engine, the steel wheels are driven to run on the rails, and the two parallel rails penetrate through the whole platform, so that the crank arm lifting device can complete rust removal and corrosion prevention operation on the surface of the whole platform within a running range. In order to improve the stability of the crank arm lifting device, the design of the device chassis is very wide, so that the device is prevented from tilting when the crank arm works at the maximum radius, and the safety of personnel is ensured.

As shown in fig. 2, when the crank arm lifting device works at a certain place, the equipment needs to be stopped and fixed to ensure normal work. In order to fix the crank arm lifting device, the mechanical arms arranged in front of and behind the vehicle body are put down under the action of the hydraulic rod, when the tail ends of the mechanical arms contact with the rail, the opened clamping devices begin to contract under the action of the hydraulic rod, the pressure of the hydraulic rod is controlled, the mechanical arms are tightly embraced by the rail, and the device is fixed under the action of the mechanical arms.

As shown in the attached figure 1, the fixed crank arm lifting device starts to operate, and in an initial state, a hanging basket is horizontally parked on the upper surface of a chassis, workers enter the hanging basket from the upper surface of the chassis, and various switch knobs are arranged in the hanging basket; when the hydraulic lifting device is in a working state, a worker operates the switch knob to control the hydraulic rod to stretch and retract, so that the crank arm is lifted or lowered. When the platform rises to a certain height, the working personnel can control the rotation of the turntable by operating the switch knob, and the working personnel can complete the operation in a certain area. After the operation of each area is finished, the crank arm lifting device is restored to the initial state, the hydraulic rod retracts the mechanical arm, the diesel engine drives the steel wheel to move forwards or backwards, and the operation of the next area is continued.

Claims

1. The utility model provides a crank arm elevating gear for offshore platform lower surface rust cleaning which characterized in that: the design twice is parallel and runs through the track of whole platform, and the channel-section steel is chooseed for use to the track, and the recess is placed downwards on the circular crossbeam of platform, and is fixed track and crossbeam through the hoop for the bolt. In order to facilitate the movement and the walking of the crank arm lifting device, four groove type steel wheels are designed according to the section size of the channel steel, so that the channel steel is just clamped on the rail and does not roll obliquely. Two manipulators are arranged in front of and behind the crank arm lifting equipment respectively, and the tail ends of the manipulators are provided with hydraulic clamping devices, so that the track is embraced and the crank arm lifting equipment is fixed during working. The crank arm lifting device can rotate 360 degrees, and the crank arm can be lifted, so that large-scale operation can be completed.