Hoisting arm

Technical Field

The utility model pertains to the field of prefabricated transformer substation shell lifting tool, especially relates to a hoisting preassembled transformer substation shell with a lifting arm.

Background Art

Preframed substation of in the prior art in the process of lifting the shell, through the corresponding dimension of the rope with the hanging arm to lift. Preframed substation of different size shell needs specialized making the size of the corresponding boom, so each change different size shell to Preframed substation of a hanging arm required to be made, not only caused to a great extent the waste of steel, and has a large size of the lifting arm is also need to consume relatively large storage space.

Content of the utility model

The purpose of the utility model is to provide a lifting arm, the utility model has the advantages of simple structure, composed of a main boom and a secondary crane arm can be telescopic adjusting length, low cost, small occupied space.

The technical scheme of the utility model are as follows:

A has the lazy arm , the lifting arm of the a-arm which comprises a tube-shaped, the two ends of the main boom are provided with a clearance fit with a secondary crane arm, the arm is provided with a jack and a secondary crane arm, composed of a main boom and a secondary crane arm through the fixed pin and the jack can be detachably connected, the lifting block is provided with a fixation vice-lazy arm end , hanging block is arranged on the top of the hanging holes 1st, 2nd is arranged at the bottom of the hanging hole, which is connected to the cable hanging holes 1st, 2nd with the lifting holes is preassembled transformer substation.

Preferably, the centre of the main boom are place diameter to the solid is provided with two parallel connecting rods, each connecting rod and is connected with one end of the elastic member, the other end of the elastic member with the corresponding vice-lazy arm end part is connected.

Preferably, the elastic member is a spiral spring.

When the work, according to the required hoisting premounting transformer substation the size of the shell, the two vice-lazy arm along host hanging arm axis sliding to the proper length, the scroll spring is in the stretched state. Then the securing pin is inserted and a secondary crane arm on the main boom are the jack in order to fix the relative position of the arm and a secondary crane arm. The preassembled transformer substation shell is connected with the rope and, through cable, with the rope and suspension arm, preassembled transformer substation shell to the target position.

After loading, the lifting rope and the prefabricated substation housing, and then the fixed pin and the plug, two scroll vice-lazy arm in the reset tension of the spring, along the axial direction of the suspension arm retracted, the utility model can be placed.

Compared with the prior art, has the following advantages:

The model relates to a lifting arm also has simple structure, composed of a main boom and a secondary crane arm can be telescopic adjusting length, low cost, quick and convenient use and adjustment, and the storage space occupied by the small.

Description of drawings

Figure 1 is the structure diagram of specific embodiment a lifting arm;

Figure 2 is the structure diagram of specific embodiment a lifting arm;

Figure 3 to Figure 2 in the internal main boom structure diagram.

The marking in the picture: composed of a main boom 1, a secondary crane arm 2, hanging block 3, hanging holes 1st 4, 2nd lifting hole 5, jack 1st 6, the cable 7, the sling 8, 2nd jack 9, scroll spring 10, the connecting rod 11.

Mode of execution

In order to ensure that the purpose of the utility model, the technical scheme and more clearly understand, the following binding with photos and embodiment, the utility model relates to a further detailed description. It should be understood, as described herein for only specific examples of the interpretation of this utility model, is not used for limiting the utility model.

As shown in Figure 1-3, a has the lazy arm , with the lower arm which comprises a tube-shaped 1, composed of a main boom 1 is provided with a clearance fit with the two ends of a secondary crane arm 2, arm 1 is provided with a 1st jack 6, a secondary crane arm 2 is provided with a 2nd jack 9, composed of a main boom 1 and a secondary crane arm 2 through the fixed pin and the 1st jack 6 and 2nd jack 9 is detachably connected with the fitting, a secondary crane arm 2 is provided with a hanging block being 3, hanging block 3 is arranged on the top of the hanging holes 1st 4, is arranged at the bottom of the hanging holes 2nd 5, hanging holes 1st 4 and the cable 7 is connected, 2nd lifting hole 5 through lifting rope 8 is connected with the preassembled substation shell. Composed of a main boom 1 is the centre to place diameter is provided with two parallel connecting rods 11, each connecting rod 11 the spiral spring 10 is connected with one end of the, volute spring 10 the other end is connected with the corresponding a secondary crane arm 2 is connected with the end.

When the work, according to the required hoisting premounting transformer substation the size of the shell, the two a secondary crane arm 2 along the main suspension arm 1 axis sliding to the proper length, the volute spring 10 is in a stretched state. Then the main boom are inserted into the fixing pin 1 of jack 1st 6 and a secondary crane arm 2 of the 2nd jack 9 with the fixed arm 1 and a secondary crane arm 2 of the relative position. Then the lifting rope 8 is connected with the preassembled substation shell, through cable 7, composed of a main boom 1, a secondary crane arm 2 and the hoist cable 8 matching, preassembled transformer substation shell to the target position.

After loading, the lifting rope 8 and the prefabricated substation housing, and then the fixing pin and the 1st jack 6 and 2nd jack 9 separation, two a secondary crane arm 2 in the volute spring 10 under the reset force, along the main boom 1 retraction axis line direction, the utility model can be placed.