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Inner expansion connection device

A connection device and expansion connection technology, applied in construction, sheet pile walls, foundation structure engineering, etc., can solve the problems of small connection size, stuck, different end plate structures, etc., achieve complete self-locking function, save time, The effect of tight connection

Pending Publication Date: 2020-09-11
ZHEJIANG NANKETAI METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned structure using mechanical meshing connection construction can save time for connecting pipe piles on site, it still has the following disadvantages: 1. The cost of the connection box is relatively high, and the manufacturing process is relatively complicated; 2. The position of the positioning plate with teeth in the connection box Fixing (vertical direction) is more difficult; 3. The structure of the end plates at both ends of the pipe pile is different, and it must be distinguished before hoisting during connection, which is troublesome; 4. The size of the connection formed between the two positioning plates with teeth is small , the connecting pins must be aligned in all directions before they can be inserted smoothly, and all the connecting pins must be aligned with all the connecting ports one by one at the same time, otherwise there will be a stuck phenomenon, which will damage the connecting pins and the positioning plate with teeth , but it is difficult to align the two quickly and accurately after the entire pipe pile is lifted vertically, and it takes a long time

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0040] An internal expansion connection device, comprising:

[0041] The expansion shell 1 has a through groove running through both ends, and the through groove includes a protruding section 12 and a clamping segment 11, the internal diameter of the clamping segment 11 is larger than the internal diameter of the protruding segment 12;

[0042] A cover 4, which is arranged on one end of the expansion shell 1 corresponding to the clamping section 11;

[0043] The expansion connecting pin 3 includes a connection section 32 and an expansion section 31. The expansion section 31 is provided with an expansion groove 311. The expansion groove 311 extends axially from the end of the expansion section 31 to the direction of the connection section 32. The expansion groove 311 connects the expansion section 31 Divided into at least two parts, the expansion section 31 extends into the expansion shell 1;

[0044] The wedge 2 includes a head 21 and a tail 22, and its outer surface graduall...

Embodiment 2

[0059] In this embodiment, the expansion connecting pin 3 has a connection section 32 and two expansion sections 31, and the two expansion sections 31 are respectively located at both ends of the connection section 32, as Figure 7 As shown, at this time, the connecting section 32 may not have an external thread 321, and the rest of the technical features are the same as those in the first embodiment.

[0060] When making pipe piles, the expansion shells 1 are arranged on both end plates of the pipe piles, and there is no need to arrange bolt holes on the end plates, it is only necessary to align the through holes with the through grooves of the expansion shells 1, that is to say, at this time Both ends of the pipe pile have the same structure.

[0061] When connecting, any end of the lower pipe pile is driven into the ground, and then the upper pipe pile is lifted to the top of the lower pipe pile, and any end of the upper pipe pile can also be lifted; two wedge-shaped pieces...

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Abstract

The invention discloses an inner expansion connection device. An expansion shell, a seal cover, an expansion connecting pin and a wedged piece are included. The expansion shell is provided with a through groove penetrating through the two ends. The through groove comprises a stretching-in section and a clamping connection section, and the inner diameter of the clamping connection section is largerthan that of the stretching-in section. The seal cover is arranged at the end, corresponding to the clamping connection section, of the exterior of the expansion shell. The expansion connecting pin comprises a connection section and an expansion section. The expansion section is provided with an expansion groove. The expansion groove axially extends in the connection section direction from the end portion of the expansion section. The expansion groove divides the expansion section into at least two parts, and the expansion section stretches into the expansion shell. The wedged piece comprisesa head part and a tail part, the outer surface of the wedged piece is gradually inwards folded from the head part to the tail part, and the wedged piece stretches into the expansion section from thetail part along the expansion groove so that the expansion section can be expanded. The inner expansion connection device is simple in structure and low in cost, connection is more reliable, and usageis more convenient.

Description

technical field [0001] The invention belongs to the field of construction engineering foundation piles, and more specifically relates to an internal expansion connection device. Background technique [0002] In pile foundation projects such as underground engineering, high-rise buildings, offshore wharf platforms, cable-stayed bridges, suspension bridges, large dock floors, and static load test piles, the ground needs to be reinforced in order to balance the buoyancy of the groundwater. The main measures adopted are in the ground. Pipe piles are buried in the ground, and the ground is reinforced by the tension of the pile foundation and the concrete grouting body integrated with the pipe piles, so that the ground forms an integral structure, so as to achieve the purpose of controlling its deformation. [0003] The uplift pile occupies an important position in the whole pipe pile system and is widely used because of its advantages of balancing the buoyancy of groundwater afte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/52
CPCE02D5/526
Inventor 黄雪华
Owner ZHEJIANG NANKETAI METAL PROD