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Method for embedding precession-type backfill grouting ground source thermal energy conversion precast pile device into stratum

A technology of grouting behind the wall and ground source heat energy, applied in heat pumps, sheet pile walls, refrigerators, etc., can solve the problems of high pre-drilling cost, difficult development of ground source heat pump technology, complicated heat exchange tube process, etc. Low construction cost, convenient closed cycle conversion, and the effect of expanding the contact area of ​​heat exchange

Inactive Publication Date: 2014-11-26
CHINA JINGYE ENG TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Ground source heat pumps can provide ground source heat energy to buildings. This environmentally friendly and energy-saving method is being widely used. The way of heat pipe is to convert underground heat energy to the ground, but the cost of pre-drilling is very high, generally accounting for more than half of the total investment, and the process of embedding heat exchange tubes in boreholes is very complicated
This has caused difficulties for the development of ground source heat pump technology.

Method used

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  • Method for embedding precession-type backfill grouting ground source thermal energy conversion precast pile device into stratum
  • Method for embedding precession-type backfill grouting ground source thermal energy conversion precast pile device into stratum
  • Method for embedding precession-type backfill grouting ground source thermal energy conversion precast pile device into stratum

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Embodiment Construction

[0028] Such as figure 1 As shown, the screw-in type back-grouting ground source thermal energy conversion prefabricated pile device of the present invention includes several screw-in type back-grouting prefabricated screw piles 1 embedded in the pile holes, and each screw pile 1 is embedded with vertical Heat exchanger 2, the vertical heat exchanger 2 is a U-shaped vertical heat exchange tube, the inlet end and the outlet end of each vertical heat exchange tube protrude from the upper opening of the screw pile 1 respectively, and are connected with the horizontal liquid inlet header 3 and the horizontal liquid outlet respectively. Header 4 connections.

[0029] combine figure 2 , 3 As shown, the prefabricated screw pile 1 of screw-in type post-wall grouting includes a cylindrical hollow pile core 11, a conical pile head 12 is set at the bottom of the pile core 11, and a spiral blade 13 is set at the position 1-3m below the outer wall of the pile core 11. The grouting prefa...

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Abstract

The invention discloses a precession-type backfill grouting ground source thermal energy conversion precast pile device, which comprises a plurality of precession-type backfill grouting prefabricated screw piles respectively embedded into pile holes, wherein a vertical heat exchanger is embedded in each screw pile; the inlet end and the outlet end of each vertical heat exchanger respectively extend out of an opening at the upper end of the screw pile to be respectively connected with a horizontal liquid-feeding collecting pipe and a horizontal liquid outlet collecting pipe in a bearing platform or a cushion layer; centring brackets are arranged at an interval of 1-3 m along the length direction of each vertical heat exchanger; each precession-type backfill grouting prefabricated screw pile comprises a hollow pile core, wherein the bottom of the pile core is provided with a cone-shaped pile head; a screw blade is arranged on the position far away1-3m from the lower part of the outer wall of the pile core; and a post grouting reinforcing layer is poured between the middle upper part of the outer wall of the pile core and a pile hole wall. The precession-type backfill grouting ground source thermal energy conversion precast pile device comprises a plurality of precession-type backfill grouting prefabricated screw piles, and the vertical heat exchanger is embedded in each screw pile; the pile foundation construction and the ground source heat pump construction are integrated so as to avoid a drilling and pipe-laying program of a ground source heat pump system on the ground, greatly lower the front-end investment cost and save the land use area; and the post grouting reinforcing layer is poured between the middle upper part of the outer wall of the pile core and the pile hole wall so as to enlarge a heat conduction area, improve the heat conduction performance and simultaneously improve the pile body bearing capacity.

Description

technical field [0001] The invention relates to the technical field of ground source thermal energy prefabricated piles, in particular to a method for embedding a ground source thermal energy conversion prefabricated pile device into a ground by grouting behind a screw-in wall. Background technique [0002] Ground source heat pumps can provide ground source heat energy to buildings. This environmentally friendly and energy-saving method is being widely used. The way of heat pipe is to convert underground heat energy to the ground, but the cost of pre-drilling is very high, generally accounting for more than half of the total investment, and the process of embedding heat exchange tubes in boreholes is very complicated. All these have caused difficulties for the development of ground source heat pump technology. Pile foundation is a common form of foundation for buildings. Usually, the diameter of the pile is from 0.5 to 2.0m, and the length of the pile is ten meters, or even...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/56E02D7/22F25B30/06
Inventor 李志毅张全胜张慧东柳建国马凛
Owner CHINA JINGYE ENG TECH CO LTD
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