CN2701595Y - Steel structure high strength bolt and connecting plate changing tool - Google Patents

Abstract

The utility model discloses a steel structure high-strength bolt and a connecting plate replacement tool. It includes two jacks, and its characteristic is that there is a plate above and below the two jacks, and there is a square hole in the center of the plate, which is inserted into the square holes of the two plates on the side of the two jacks Tighten the two movable wedges. When the high-strength bolts and connecting plates are disassembled, because the friction force generated by the connecting plate on the steel plate is replaced by a wedge, the friction between the steel plate and the connecting plate is transferred to the jack, so that the high-strength bolts and connecting plates do not bear the force. Can be disassembled and replaced. The utility model has the advantages of simple structure, convenient operation, quickness, safety, low cost and no damage to the steel plate structure.

Description

Replacement tools for high-strength bolts and connecting plates in steel structures

technical field

The utility model relates to the replacement technology of high-strength bolts and connecting plates in large-scale steel structures.

Background technique

In a large steel structure, such as a crane steel structure, the connection between the structural steel plate and the steel plate is through the action of high-strength bolts and the connecting plate, which gives the steel plate a pre-tightening pressure, and the friction between the connecting plate and the steel plate is formed. , thereby joining the steel plates together. It can also be said that the high-strength bolt connection is a friction connection. However, the magnitude of the pretightening force of high-strength bolts gradually decreases with time. In addition, the long-term corrosion has greatly reduced the pre-tightening force of the bolts. Therefore, high-strength bolts and connecting plates must be replaced after a long period of use. However, large-scale steel structure equipment cannot be transported to the processing plant for replacement, but can only be replaced at the use site, and it is very difficult. Existing replacement of high-strength bolts and connecting plates adopts steel plate parts to be welded together with other steel components between the steel plate parts. This produces internal stress damage to the steel structure, and the cost is relatively large.

Contents of the invention

Aiming at the deficiencies in the prior art, the utility model provides a tool for replacing high-strength bolts and connecting plates of a steel structure. It enables fast and efficient replacement of high-strength bolts and connecting plates, preventing structural steel damage and performance degradation.

The utility model is realized through the following technical proposals. It includes two jacks. The disassembled half valves are connected, and two movable wedges are respectively arranged in the square holes of the two plates on one side of the two jacks.

Above-mentioned two detachable half valve plates can be connected with steel plate hook, also can be connected with steel plate, screw.

The utility model uses a simple tool structure composed of plates, jacks and wedges. Through convenient operation, the jack supports the plates, and the square holes of the plates are tightened by movable wedges. The friction force between the steel plate and the connecting plate is transferred to the jack, so that the high-strength bolts and connecting plate can be disassembled and replaced without bearing the force. The utility model has the advantages of quickness, safety, low cost and no damage to the steel plate structure.

Description of drawings

The utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a partial sectional view of the steel structure connection in the structural schematic diagram.

Detailed ways

In Fig. 1 and Fig. 2, taking a crane as an example, the high-strength bolt 1, connecting plates 2, 3 and steel plate parts 4, 5 in the label represent the connection relationship of the local steel structure of the equipment. Wedge 6,11 and plate 7,9 and jack 8,10 are the replacement tools of the present embodiment in the label. When working, the two halves of the plates 7 and 9 are respectively placed on the positions of the high-strength bolts 1 to be replaced and the steel plates 4 and 5 of the connecting plates 2 and 3, and the plates 7 and 9 are respectively connected into one body. Can be connected with steel plate hook or with steel plate, screw, present embodiment is connected with steel plate hook. Insert one side in the square hole of plate 7,9 with each two wedges 6,11, make plate 7,9 and steel plate parts 4,5 tenon tightly. Jack 8,10 is placed in the middle of plate 7,9, and places wedge 6,11 one side, allows jack 8,10 support plate, just can dismantle high-strength bolt 1 and connecting plate 2,3 near jack 8,10 one side. Because the frictional force produced by connecting plates 2,3 to steel plate parts 4,5 is replaced by wedges 6,11, that is to say, force supports steel plate parts 4,5 by wedges 6,11, and the force on wedges 6,11 is transferred to On jack 8,10, bear by jack 8,10. In this way, the high-strength bolt 1 and the connecting plates 2, 3 can be easily replaced.

Claims (2)

1. A tool for replacing high-strength bolts and connecting plates of a steel structure, comprising two jacks, characterized in that a plate is provided above and below the two jacks, a square hole is arranged in the center of the plate, and the plate is composed of two detachable Two movable wedges are respectively arranged in the square holes of the two plates on one side of the two jacks. 2. The tool for replacing high-strength bolts and connecting plates of steel structures according to claim 1, characterized in that the two detachable half-valve plates can be connected by steel plate hooks, or by steel plates and screws.

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