CN106315436B - A kind of general's pillar ocean platform crane anti-squat system - Google Patents

Abstract

The invention relates to an anti-backward device for a general-column offshore platform crane, which includes an L-shaped anti-backward bracket. There are two anti-backward brackets, which are relatively symmetrically arranged and installed to pass through the general column of the general-column offshore platform crane. Bearings realize the opposite sides of the intermediate body that is connected in rotation. The intermediate body is welded between the truss of the portal frame and the pulley block bracket. There is a buffer rubber block with a groove at the front end of the anti-back tilt bracket. The angle between the front end surface of the buffer rubber block and the horizontal plane is 82 degrees. The anti-tilt device of the offshore platform crane of the present invention can not only prevent the backward tipping of the offshore platform crane during the luffing process, solve the problem of rigid impact between the jib jib and the general column, but also have a strong impact on the jib jib. Certain limit function, simple structure and high reliability.

Description

An anti-backward tilting device for a general column type offshore platform crane

technical field

The invention belongs to the technical field of offshore platform cranes, and in particular relates to an anti-backward device for a general column type offshore platform crane.

Background technique

As people's demand for oil and natural gas increases day by day, and the application of new technologies in ocean engineering has greatly reduced the cost of ocean energy exploitation, countries all over the world have stepped up their efforts in ocean development. With the rapid development of ocean development, ocean platforms have been widely used.

As an indispensable production and safety equipment for cargo loading and unloading and personnel transportation on offshore platforms, offshore platform cranes need to face various working conditions and use various working postures during normal use. When the boom jib of the offshore platform crane is changed from the horizontal position to the near vertical position, it will be affected by loads such as inertial load, wind load, wave load, etc., and the jib jib may have a large rigid impact with the general column. Or tip over backwards during luffing.

The existing offshore platform cranes will face the above problems in the normal working process, but at present, there are few design technologies for the anti-backward device of the offshore platform cranes, and most of the existing offshore platform cranes are only equipped with simple limit mechanisms. To a certain extent, this problem can be alleviated, but the effect is not very good in actual use, and there are potential safety hazards.

Contents of the invention

The purpose of the present invention is to solve the above-mentioned technical problems and provide an anti-rolling device for a general-column offshore platform crane, which can effectively prevent the backward tilting of the arm frame of the military-column offshore platform crane during the luffing process. TIP HAZARD.

To achieve the above object, the present invention adopts the following technical solutions:

An anti-backward device for a general-column offshore platform crane, comprising L-shaped anti-backward brackets, two anti-backward brackets, which are relatively symmetrically arranged and installed on the general column of the general-column offshore platform crane to achieve rotation through bearings The opposite sides of the connected intermediate body, which is welded between the truss of the portal frame and the pulley block bracket, has a buffer with a groove at the front end of the anti-roll bracket pointing to the main chord of the boom jib The rubber block, when the boom jib is tilted back to the corresponding position during the luffing process, the groove can be in contact with the main chord to prevent the boom jib from tilting back too much, and the front end of the buffer rubber block The angle between the plane and the horizontal plane is 82 degrees.

Preferably, the anti-rolling bracket is installed on the intermediate body using bolts.

Preferably, the buffer rubber block is installed on the front end of the anti-roll back bracket through bolts, nuts and washers.

The anti-tilt device of the offshore platform crane of the present invention can not only prevent the backward tipping of the offshore platform crane during the luffing process, solve the problem of rigid impact between the jib jib and the general column, but also have an impact on the jib jib. Certain limit function, simple structure and high reliability.

Description of drawings

Fig. 1 is a schematic diagram of the installation position of the anti-backward device of the offshore platform crane;

Figure 2 is a partial enlarged view in Figure 1;

Fig. 3 is the front view after the anti-tilt bracket is installed and connected with the intermediate body;

Fig. 4 is the three-dimensional schematic view of the connection between the anti-tilt bracket and the buffer rubber block;

Fig. 5 is a side view schematic diagram of the connection between the anti-tilt bracket and the buffer rubber block;

Fig. 6 is a schematic side view of the intermediate body;

Fig. 7 is a schematic diagram of the contact between the main chord of the boom jib and the anti-back tilt bracket;

Fig. 8 is a schematic diagram of the buffer rubber block.

Detailed ways

Below, the substantive features and advantages of the present invention will be further described in conjunction with examples, but the present invention is not limited to the listed examples.

As shown in Figure 1-4, an anti-dip device of a general post offshore platform crane is installed on the general post offshore platform crane. As a known technology, the general post offshore platform crane includes a turntable 9, a general post 8. The gantry 2 (including the truss at the lower part and the pulley bracket supporting the pulley block 20 at the upper part), the turntable 9 and the general column 8 are connected by bearings for easy rotation, the gantry 2 is connected with the turntable 9 through the pin 22, and the gantry 2 The upper part is connected with the general column 8 through bearings, and the gantry 2 and the turntable 9 can rotate 360 degrees around the axis of the general column 8; Connect and rotate; boom arm frame 1 has main chord rod 5, and the upper end of door frame 2 is installed with pulley block 20 and the pulley block (not shown) of boom arm frame 1 front end through the wire rope (not shown) Out) connection, the structure of the door frame 2 is similar to that of the boom arm frame 1, and is all welded by steel pipes.

As described in the background technology, the back tilt will occur during the luffing process by the boom arm frame 1. In the present invention, an anti-back tilt device is provided on the general column type offshore platform crane, and the anti-back tilt device Including anti-backward bracket 3, the anti-backward bracket is two, relatively symmetrically arranged and installed on the intermediate body 7 that can rotate around the general column 8 (see Figure 3), and the intermediate body 7 is welded on the door Between the truss of the frame 2 and the pulley block support supporting the pulley block 20, there is a buffer rubber block 4 at the front end of the anti-back support 3 (pointing to the end of the main chord 5 of the boom arm frame 1), as shown in Figure 4, The anti-backward bracket 3 is installed on the intermediate body 7 with bolts, and the buffer rubber block 4 is installed on the front end of the anti-backward bracket through bolts 6, nuts 62 and washers 61, as shown in Figure 7; The angle a between the front end surface of the buffer rubber block 4 of the reclining support and the horizontal plane is 82 degrees (as shown in Figure 5), which can make the anti-reclining support better fit the arm frame 1 of the boom. Corresponding two main chords 5, so that when the boom jib is tilted back to the corresponding position during the luffing process, the groove and the main chord can be in close contact to prevent the boom jib from tilted too much,

Referring to Fig. 6, specifically, the intermediate body 7 is provided with bolt holes 10, which are used for the installation of the connecting bolts of the two anti-backward brackets 3, and are connected to the intermediate body 7 of the door frame through bolts and nuts. The connection is fixed, wherein, the intermediate body 7 is connected with the general column 8 through a bearing, which is convenient to rotate, and makes the door frame 2 rotate relative to the general column 8 .

Referring to Fig. 6, the intermediate body 7 includes an upper plate 71, a lower plate 72 and an intermediate portion 73 connecting the upper plate and the lower plate, the two sides of the intermediate portion are provided with the bolt holes 10, and the intermediate portion The interior of the door frame 2 is rotatably connected to the general post 8 through a bearing device, so as to realize the rotatable connection between the door frame 2 and the general post 8 .

The lower plate 72 is welded to the bottom of the door frame 2, and the upper plate is connected to the pulley bracket of the pulley block 20 provided at the upper end of the door frame, as shown in FIG. 1 .

When the jib jib of the offshore platform crane reaches the maximum angle, as shown in Figure 1, on the one hand, the anti-tilt bracket uses the support function of the general column to prevent the jib jib from continuing to tilt backward and tip over, and on the other hand On the one hand, the buffer rubber block 4 can slow down the rigid impact between the boom arm frame and the general column 8, and can play a good buffering role in dangerous situations, reducing the inertia of the general column, gantry and other structures of the offshore platform crane. shock.

It can be seen from the above structure that the present invention can not only prevent the offshore platform crane from tipping backwards during the luffing process, solve the problem of rigid impact that may occur between the jib jib and the general column, but also prevent the jib jib from changing. The width produces a certain limit effect, which solves the potential safety hazards of the offshore platform crane in the normal working process

In the present invention, the main structure of the anti-backward support is welded by rectangular tubes, I-beams and steel plates, and the materials are all Q345B; the welded steel plates are punched with four bolt mounting holes, specifically, see Figure 4 As shown, the bracket body 30 formed by a rectangular tube and the front connecting plate 34 for connecting the buffer rubber block 4 arranged at the front end of the bracket body 30 are made of steel plates, and the rear end of the bracket body 30 is used for connecting with The connection part 31 formed by the I-shaped steel connected to the intermediate body 7 is connected with the bracket main body 10 in an L-shaped structure, and the surface of the connection part 31 for connecting with the intermediate body 7 is provided There is a connecting plate 32 of the intermediate body, which is made of a steel plate, and the connecting plate 32 of the intermediate body is provided with corresponding bolt holes 33 corresponding to the bolt holes 10 on the intermediate body 7 .

In the present invention, as shown in FIG. 8 , the buffer rubber block 4 is designed with grooves, with grooves 41 in the middle, and its four corners are thinned, and bolt holes 42 are provided at the thinned four corners to facilitate installation. The bolts are connected with the front connecting plate 34 by bolts; the connections of the components of the anti-tilt support are all connected by bolts.

The invention can not only effectively prevent the offshore platform crane from tipping backwards during the luffing process, solve the problem of rigid impact between the jib arm frame and the general column, but also limit the amplitude of the jib arm frame to a certain extent The function, coupled with the function of the offshore platform crane's own rope control and travel limiter, makes it easier to control the elevation angle of the boom jib of the offshore platform crane and safer.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (3)

1. An anti-dipping device for a general-column offshore platform crane is characterized in that it comprises an L-shaped anti-backward support, and the anti-backward support is 2, which are relatively symmetrically arranged and installed on the side of the general-column offshore platform crane. The general column realizes the opposite sides of the intermediate body that is rotatably connected through bearings, and the intermediate body is welded between the truss of the portal frame and the pulley block support, at the front end of the main chord of the anti-reverse support that points to the boom jib There is a buffer rubber block with a groove. When the boom jib tilts back to the corresponding position during the luffing process, the groove can be in contact with the main chord to prevent the boom jib from tilting back too much. The angle between the front end surface of the buffer rubber block and the horizontal plane is 82 degrees. 2 . The anti-backward device of the general column type offshore platform crane according to claim 1 , wherein the anti-backward bracket is installed on the intermediate body using bolts. 3. According to claim 1 or 2, the anti-backward device of the general column type offshore platform crane is characterized in that, the buffer rubber block is installed on the front end of the anti-backward bracket through bolts, nuts and washers.