CN103303818A - Construction method of tower crane boom overhead extension - Google Patents

Abstract

The invention discloses a construction method of tower crane boom overhead extension. The construction method comprises the steps that: I, a herringbone lifting rod is lifted to a balance arm of the tower crane; II, a trolley is moved to a rear end of the boom; III, the rear end of the herringbone lifting rod is fixed on the trolley; IV, the trolley is moved to the front end of the boom; V, a main hoist steel rope of the tower crane passes a guide pulley at a front end of the herringbone lifting rod and penetrates a small lifting hook; and the rear end of the rope is fixed at the front end of the herringbone lifting rod; VI, the small lifting hook lifts a boom to be connected to a boom connection position; when the connection parts on lower ends of the two booms matches, connection pins on the lower ends of the booms are connected; and VII, the boom is slowly lifted, until the upper end connection part matches perfectly; and the connection pins on the upper ends are connected, such that boom overhead extension is completed. With the method, the construction cost is low, and a problem of impossibility of boom extension on ground is smoothly overcome, such that project construction requirement is satisfied.

Description

The form of construction work of the aerial spreading crane arm of a kind of tower crane

Technical field

The present invention relates to the technical field of building operation, specifically the form of construction work of the aerial spreading crane arm of a kind of tower crane, particularly its mechanical connecting structure.

Background technology

When tower crane is installed on prosperity commercial street, city center, close together around the project between existing building and the building yet to be built, so the tower crane crane arm can not once mounting put in place, according to the actual pitch between building yet to be built and the existed building, generally need to reduce 5 meters long crane arms, when treating that depth of building surpasses existing building, again tower crane crane arm spreading is arrived the project Len req.

According to the project on-site actual situations, the spreading crane arm can not use wheel crane, so need to improve form of construction work, utilizes tower crane self member, realizes the spreading crane arm in the air at height, and guarantees construction quality and construction safety.

Summary of the invention

The object of the present invention is to provide the form of construction work of the aerial spreading crane arm of a kind of tower crane, it utilizes the amplitude variation trolley of tower crane that the herringbone gib is moved to and connects the arm position, this herringbone gib and tower crane hoisting mechanism have been formed crane arm from assembling device, realize the operation of high-altitude spreading tower crane crane arm.

To achieve these goals, technical scheme of the present invention is: the form of construction work of the aerial spreading crane arm of a kind of tower crane is characterized in that: described construction procedure:

I, the chevron pointing gib winched to the equilibrium arm of tower crane from ground;

II, amplitude variation trolley moves to the crane arm root;

III, the chevron pointing gib is maneuvered into by the amplitude variation trolley, and chevron pointing gib root is fixed on the amplitude variation trolley;

IV, mobile amplitude variation trolley pass through pull bar and arrive crane arm end and fixing;

V, walk around the leading sheave of chevron pointing gib end and pass little suspension hook root with the main winch steel rope of tower crane and be fixed on chevron pointing gib end;

VI, little suspension hook are sling crane arm to be connect, and are promoted to and connect the arm position, utilize bottle gouard moved by hands mechanism that two joint crane arm bottoms are connected, and the hand adjustment bottle gouard moved by hands till the junctions for the treatment of two joint crane arm lower ends coincide, connects the connection bearing pin of crane arm lower end;

VII, slow lifting crane arm make crane arm rotate around the connection bearing pin of lower end, treat that the upper end connecting bridge fits like a glove till, the connection bearing pin of upper end is connected, finish aerial spreading crane arm.

The invention discloses the form of construction work of the aerial spreading crane arm of a kind of tower crane, this method construction cost is low, and can successfully implement the crane arm spreading problem that can't implement on the ground, and satisfied the project construction needs, won the approval of client to my technical force of company.

Description of drawings

Fig. 1 is the present invention's first construction constitution diagram.

Fig. 2 is the present invention's second construction constitution diagram.

Fig. 3 is the local enlarged diagram of Fig. 2.

Fig. 4 is the present invention's the 3rd construction constitution diagram.

Fig. 5 is the present invention's the 4th construction constitution diagram.

Fig. 6 is the present invention's the 5th construction constitution diagram.

  

The specific embodiment

With reference to the accompanying drawings, the present invention further is described.

The present invention is the form of construction work of the aerial spreading crane arm of a kind of tower crane, and it is different from prior art and is: described construction procedure:

I, chevron pointing gib 1 is winched to the equilibrium arm of tower crane, this chevron pointing gib 1 from ground; Be made of two strut bars, the front end junction is provided with a pulley, and can captive joint with amplitude variation trolley 2 in the rear end, move at the crane arm place with luffing dolly 2;

II, amplitude variation trolley 2 moves to the crane arm root;

III, the chevron pointing gib is maneuvered into by the amplitude variation trolley, and chevron pointing gib root is fixed on the amplitude variation trolley;

IV, mobile amplitude variation trolley pass through pull bar and arrive crane arm end and fixing;

V, walk around the leading sheave of chevron pointing gib end and pass little suspension hook root with the main winch steel rope of tower crane and be fixed on chevron pointing gib end;

VI, little suspension hook will be waited to connect crane arm 3 and sling, and be promoted to and connect the arm position, utilize bottle gouard moved by hands mechanism that two joint crane arm bottoms are connected the hand adjustment bottle gouard moved by hands, till treating that two junctions of saving the crane arm lower ends coincide, in the connection bearing pin connection with the crane arm lower end;

VII, slow lifting crane arm make crane arm rotate around the connection bearing pin of lower end, treat that the upper end connecting bridge fits like a glove till, the connection bearing pin of upper end is connected, finish aerial spreading crane arm.

Above content be in conjunction with concrete preferred implementation to further describing that the present invention does, can not assert that the present invention is concrete to implement to be confined to above-mentioned these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.

Claims (1)

1. the form of construction work of the aerial spreading crane arm of tower crane is characterized in that: described construction procedure:

I, the chevron pointing gib winched to the equilibrium arm of tower crane from ground;

II, amplitude variation trolley moves to the crane arm root;

III, the chevron pointing gib is maneuvered into by the amplitude variation trolley, and chevron pointing gib root is fixed on the amplitude variation trolley;

IV, mobile amplitude variation trolley pass through pull bar and arrive crane arm end and fixing;

V, walk around the leading sheave of chevron pointing gib end and pass little suspension hook root with the main winch steel rope of tower crane and be fixed on chevron pointing gib end;

VI, little suspension hook are sling crane arm to be connect, and are promoted to and connect the arm position, utilize bottle gouard moved by hands mechanism that two joint crane arm bottoms are connected, and the hand adjustment bottle gouard moved by hands till the junctions for the treatment of two joint crane arm lower ends coincide, connects the connection bearing pin of crane arm lower end;

VII, slow lifting crane arm make crane arm rotate around the connection bearing pin of lower end, treat that the upper end connecting bridge fits like a glove till, the connection bearing pin of upper end is connected, finish aerial spreading crane arm.

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