CN110203837A - A kind of main loop wheel machine rest arm configuration of Semi-submersible type hoisting platform and lifting platform - Google Patents

Abstract

The present invention discloses a kind of main loop wheel machine rest arm configuration of Semi-submersible type hoisting platform and lifting platform, wherein main loop wheel machine rest arm configuration is for placing main loop wheel machine boom, including two main I-beams, several connection I-beams and several support pipes, two main I-beams are welded to connect by connection I-beam and support pipe；Above main I-beam, it is welded with main loop wheel machine rest arm slot；Main I-beam is made of welded connection by I-steel, A-shaped.The present invention replaces original circular tube structure using structural I-beam, increases main loop wheel machine rest arm self-strength, in a limited space, the intensity of structural I-beam is significantly stronger than the intensity of circular tube structure.

Description

A semi-submersible lifting platform main crane rest arm structure and lifting platform

technical field

The invention relates to the field of marine lifting platforms, in particular to a rest arm structure of a main crane of a semi-submersible lifting platform and a lifting platform.

Background technique

Semi-submersible lifting platforms are often equipped with one or more main cranes. For the main cranes with extra large lifting capacity, their own weight is relatively large. Due to space reasons, the rest arm of the general circular tube main crane cannot To meet its own strength requirements, a new type of rest arm structure of the main crane is needed, which is used to place the rest arm of the main crane with extra large lifting capacity to ensure that its own structure will not be deformed.

Contents of the invention

In order to solve the above-mentioned defects in the prior art, the present invention provides a rest arm structure of the main crane of the semi-submersible lifting platform, which can place a main crane arm with an extra-large lifting capacity (2,200 tons) while ensuring its own strength.

A rest arm structure of the main crane of a semi-submersible lifting platform, which is used to place the boom of the main crane, including two main I-beams, several connecting I-beams and several supporting circular pipes, the two main I-beams The beam is welded and connected by the connecting I-beam and the supporting circular pipe; above the main I-beam, a main crane rest arm groove is welded; the main I-beam is welded and connected by I-beam, It is A-shaped.

As preferably, the I-beam includes I-beam 1, I-beam 2 and I-beam 3, the size of the I-beam 1 is H644X600X22X22, the size of the I-beam 2 is H650X600X25X35, the I-beam The size of the beam 3 is H660X600X30X30; the I-beam is connected by full penetration welding. The units of the above numerical values are mm.

Preferably, the connecting I-beams are located between the main I-beams, placed horizontally, and connected with the main I-beams by full penetration welding.

Preferably, the supporting round pipe is arranged between the connecting I-beams, forming an included angle of 45-55° with the connecting I-beams, and the ends of the supporting round pipes are welded with 25mm brackets, and through the brackets Connect with connecting I-beam and main I-beam.

Preferably, the rest arm groove of the main crane is in a "U" shape, which is spliced by steel plates of different thicknesses. The bottom of the "U" shape is a box structure, which is composed of 35mm, 25mm and 20mm steel plates. Welding; both sides of the "U" shape are also box-shaped structures, composed of 15mm and 20mm steel plates, welded by full penetration; the "U" shape is equipped with sleepers inside.

The present invention also provides a semi-submersible lifting platform, including the rest arm structure of the main crane of the semi-submersible lifting platform described in any one of the above technical solutions.

Compared with the existing rest arm of the crane, the beneficial effect of the present invention is: the present invention adopts the I-beam structure instead of the original circular tube structure, which increases the strength of the rest arm of the main crane. The strength of the beam structure is significantly stronger than that of the round tube structure.

Description of drawings

Fig. 1 is the structural representation of the rest arm structure of the main crane of the semi-submersible lifting platform of the present invention;

Fig. 2 is a front view of an I-beam according to an embodiment of the present invention;

Fig. 3 is the schematic diagram of B-B section among Fig. 1;

Fig. 4 is the schematic diagram of C-C section among Fig. 1;

Fig. 5 is a partial schematic diagram of the "U"-shaped groove structure in the rest arm structure of the main crane of the semi-submersible lifting platform of the present invention;

Fig. 6 is the schematic diagram of D-D section in Fig. 5;

Fig. 7 is the schematic diagram of E-E section among Fig. 5;

Fig. 8 is a schematic diagram of the rest arm structure of the main crane of the semi-submersible lifting platform of the present invention in use.

Explanation of reference signs:

1-1 is I-beam 1, 1-2 is I-beam 2, 1-3 is I-beam 3, 2-1 is connecting I-beam 1, 2-2 is connecting I-beam 2, 3-1 For supporting the round pipe, 4-1 is a "U" groove structure, 4-2 is a sleeper, and 5 is the boom of the main crane.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

What this embodiment describes is a rest arm structure of the main crane of the semi-submersible lifting platform, which is used to place the boom of the main crane. As shown in Figure 1, it includes two main I-beams, which stand opposite to each other, and are connected together by welding a number of connecting I-beams and a number of supporting round pipes. The top of the main I-beam is provided with a rest arm groove of the main crane for holding the rest arm of the main crane.

There are two sets of main I-beams, which are connected in an A-shape and welded by I-beams, as shown in Figures 1-7. The size of the I-beam is different, the lower part adopts the thicker I-beam, and the upper one is thinner. In the figure, the size of I-beam 1 is H644X600X22X22 (EQ51), the size of I-beam 2 is H 650X600X25X35 (EH36), and the size of I-beam 3 is H660X600X30X30 (EQ51). The units here are mm. The dimensions here are for illustration only, and are not intended to limit the dimensions of the I-beam, and the dimensions can be changed as required. The thinner I-beam 1 is used to connect the two hypotenuses of the A-shape, and all I-beams are connected by full penetration welding.

Referring to Fig. 3 and Fig. 4, the two main I-beams are connected by welding the connecting I-beams and supporting circular pipes. Among them, the connecting I-beams are located between the main I-beams, arranged horizontally, and connected with the main I-beams through full penetration welding. The connecting I-beams can be of different sizes, but they are all placed horizontally, and the two ends are respectively connected to two main I-beams.

The supporting round pipe is arranged between the connecting I-beams, forming an included angle of 45~55° with the connecting I-beams, and the included angles on both sides are slightly different to match the setting to increase the rest arm of the main crane. A 25mm bracket is welded at the end of the supporting circular tube, which is connected to the connecting I-beam and the main I-beam through the bracket to increase the firmness of the entire structure. In particular, the toggle plate includes a right-angled side that fits the I-beam 1 and connects the I-beam. The opposite side of the right-angled side is provided with several arc-shaped grooves, and the opening of the groove in the middle matches the supporting circle. The diameter of the pipe 3-1 and the grooves connecting the right-angle sides on both sides can effectively transmit the force between the three metal structures to the I-beam of the main structure evenly. Alternatively, at the part not connected to the supporting circular pipe 3-1, the bracket provided there, wherein the number of the arc can also be set to one, so as to reduce the structural weight.

Referring to Fig. 5, Fig. 6 and Fig. 7, in a specific implementation manner, a rest arm slot of the main crane may also be welded above the main I-beam. The rest arm groove 4-1 of the main crane is in a "U" shape and is formed by splicing steel plates of different thicknesses. The two sides of the "U" shape are also box-shaped structures, which are composed of 15mm and 20mm steel plates, and are welded by full penetration; the "U" shape is equipped with sleepers 4-2 for placing the main body. The crane arm acts as a buffer. Among them, the steel plate at the bottom of the "U" shape close to the bending part should be made of thicker material.

In an implementation manner, the thickness direction of the box-shaped structure at the bottom of the "U"-shaped structure can be set as a trapezoidal structure as shown in the lower part of FIG. 6 or in FIG. 7 . The lower bottom of the trapezoidal structure is wider than the upper part, which can more stably bear the weight of the main crane arm and keep it stable, and evenly transmit the force of the main crane arm through its relatively wide lower part. This can make the structure of the present invention more stable.

Wherein, the sleeper 4-2 can be arranged in an L-shaped structure along the surface of the "U"-shaped groove wall. Its lower part is connected to the upper surface of the box-shaped structure at the bottom of the "U"-shaped structure through several connecting and fixing structures. The sides of which are connected to the inside surface of the structure at the sides of the "U" shaped structure by similar attachment and fixing structures. The connection and fixing structure is to realize the stable fixing of the sleeper on the bending position of the inner wall of the rest arm groove 4-1 of the main crane, which can pass through the sleeper, and directly connect one end of the sleeper to the rest arm groove 4-1 of the main crane behind the sleeper inner wall.

All parts are connected by welding in this embodiment.

With reference to the state of use shown in Figure 8, the rest arm of the main crane of the present invention can satisfy the laying of the rest arm 5 of the 2200-ton crane, without destroying the rest arm of the crane and the lowered main deck structure.

Compared with the existing rest arm of the crane, this embodiment adopts the I-beam structure instead of the original circular tube structure, which increases the strength of the rest arm of the main crane. In a limited space, the strength of the I-beam structure will be stronger. The strength of the tube structure.

The present invention also provides a semi-submersible lifting platform, including the rest arm structure of the main crane of the semi-submersible lifting platform described in any one of the above technical solutions.

The technical means disclosed in the solutions of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims (6)

1. A main crane rest arm structure of a semi-submersible lifting platform, which is used to place the main crane boom, is characterized in that: it includes two main I-beams, some connecting I-beams and some supporting circular pipes, the The two main I-beams are welded and connected by the connecting I-beam and the supporting round pipe; above the main I-beam, there is a main crane rest arm groove welded; the main I-beam is welded by the I-beam The steel is welded and connected in an A-shape. 2. The rest arm structure of the main crane of the semi-submersible lifting platform according to claim 1, wherein the I-beam comprises I-beam 1, I-beam 2 and I-beam 3, and said I-beam The size of the beam 1 is H644mmX600mmX22mmX22mm, the size of the I-beam 2 is H650mmX600mmX25mmX35mm, and the size of the I-beam 3 is H660mmX600mmX30mmX30mm; the I-beam is connected by full penetration welding. 3. The rest arm structure of the main crane of the semi-submersible lifting platform according to claim 1, characterized in that: the connecting I-beam is located between the main I-beams, placed horizontally, and connected to the main I-beam The I-beams are joined by full penetration welding. 4. The rest arm structure of the main crane of the semi-submersible lifting platform according to any one of claims 1 to 3, characterized in that: the supporting circular tube is arranged between the connecting I-beams, and is connected to the The connecting I-beam is at an included angle of 45~55°, and the end of the supporting circular pipe is welded with a 25mm bracket, which is connected to the connecting I-beam and the main I-beam through the bracket. 5. The rest arm structure of the main crane of the semi-submersible lifting platform according to claim 1, characterized in that: the rest arm groove of the main crane is in the shape of a "U" and is spliced by steel plates of different thicknesses, " The bottom of the U" is a box-shaped structure, which is composed of 35mm, 25mm and 20mm steel plates, welded by full penetration; the two sides of the "U" are also box-shaped structures, composed of 15mm and 20mm steel plates, welded by full penetration ; There are sleepers inside the "U" shape. 6. A semi-submersible lifting platform, comprising the rest arm structure of the main crane of the semi-submersible lifting platform as claimed in any one of claims 1 to 5.