Extrusion steel semi-grouting sleeve and preparation method thereof

A semi-grouting sleeve and sleeve technology, applied in the direction of structural elements, building components, building reinforcements, etc., can solve the problems of easy formation of sharp corners, low elongation, low production efficiency, etc. Controllable process and fast production efficiency

Inactive Publication Date: 2018-12-11
CHONGQING QIFU MACHINERY
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing grouting sleeve manufacturing process generally adopts the ball milling cast iron process and mechanical processing technology. The disadvantages of the ball milling cast iron process are: 1. The nodularization rate ≥ 85% is controlled by the factory and the mechanical properties are unstable.
2. The elongation rate of ductile iron is low, and the elongation rate after fracture is ≥5%. Yicui is prone to internal stress
3. The pollution of ductile iron products is not conducive to environmental protection
The disadvantages of mechanical processing technology are: 1. The difficulty of mach

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Extrusion steel semi-grouting sleeve and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Example 1

[0038] A preparation method of a semi-grouting sleeve includes the following steps:

[0039] 1) Raw material steel bar inspection, the material of the steel bar is 45 steel;

[0040] 2) Tailoring;

[0041] 3) Thermal perforation;

[0042] 4) Removal of oxide scale and phosphorus saponification: immerse the sleeve capillary treated in the above steps in a pickling bath with a concentration of 20% and pH ≤ 2 for 25 minutes; drain the pickled sleeve capillary and immerse it in the first In a cleaning tank, lift it up and down repeatedly for 2-3 times to wash away the remaining acid; then immerse it in the second cleaning tank and then lift it up and down repeatedly for 2-3 times to clean; then clean it well Drain the sleeve capillary tube and immerse it in the phosphating solution pH=2, the temperature is 75℃, phosphating in the phosphating bath for 20 minutes; then drain the phosphated sleeve capillary tube and immerse it in the third cleaning tank, then lift , So li...

Example Embodiment

[0048] Example 2

[0049] A preparation method of a semi-grouting sleeve includes the following steps:

[0050] 1) Inspection of raw material steel bars, the material of the steel bars is 45 steel, and the elongation rate of the steel material is 18%;

[0051] 2) Tailoring;

[0052] 3) Thermal perforation;

[0053] 4) Removal of oxide scale and phosphorus saponification: immerse the sleeve capillary treated in the above steps in a pickling bath with a concentration of 20% and pH ≤ 2 for 25 minutes; drain the pickled sleeve capillary and immerse it in the first In a cleaning tank, lift it up and down repeatedly for 2-3 times to wash away the remaining acid; then immerse it in the second cleaning tank and then lift it up and down repeatedly for 2-3 times to clean; then clean it well Drain the sleeve capillary tube and immerse it in the phosphating solution pH=2, the temperature is 75℃, phosphating in the phosphating bath for 20 minutes; then drain the phosphated sleeve capillary tube an...

Example Embodiment

[0059] Example 3

[0060] The specific operation steps are basically the same as those in Example 2, except that the differences are:

[0061] 6) One annealing treatment: Put the cold-rolled sleeve capillary in a continuous annealing furnace for continuous annealing. The continuous annealing furnace is equipped with 7 burners, the air volume of the continuous annealing furnace is set to large, and the annealing temperature is set to 710 ℃, the heating rate of one annealing is 8.5℃ / min, the annealing time is 28min, and the related performance of the sleeve capillary after treatment will be tested;

[0062] 7) After cutting, squeeze the compressed tube, the grouting sleeve mold is composed of 8 petals, the extrusion length can reach 200mm, the extrusion diameter can be reduced by 15mm, and it is under pressure in all directions, which requires relatively high toughness of steel materials;

[0063] 8) Secondary annealing treatment: Place the cold-rolled sleeve capillary tube in a continu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Yield strengthaaaaaaaaaa
Login to view more

Abstract

The invention provides an extrusion steel semi-grouting sleeve and a preparation method thereof. The method comprises the following steps of (A) performing primary annealing treatment on a sleeve crude pipe subjected to cold milling at 700 to 720 DEG C for 25 to 30 min; then, performing extrusion for pipe shrinkage; (B) performing secondary annealing treatment on the sleeve treated in the first step at 550 to 600 DEG C for 15 to 20min; performing shaping processing. The preparation method has the advantages that the extrusion method is used for preparing the grouting sleeve; all defects of thegrouting sleeve prepared by ball milling and mechanical processing in the prior art are avoided; the quality in the production process is controllable; the mechanical performance change work procedure cannot occur; the production efficiency is high; no waste iron chip is discharged out in the production process; the cost is reduced; green and environment-friendly effects are achieved; the operation process is controllable; the prepared grouting sleeve has excellent performance in each aspects, so that the sleeve is worthy of being widely popularized and applied.

Description

technical field [0001] The invention relates to the field of grouting sleeve processing and preparation, in particular to an extruded steel semi-grouting sleeve and a preparation method thereof. Background technique [0002] Prefabricated concrete structures, as a structural form in line with industrial production methods, have the advantages of fast construction speed, low labor intensity, less noise pollution and wet work, and easy control of product quality, and have been widely used in developed countries. The construction method of prefabricated assembly can effectively save resources and energy, improve the utilization rate of materials in realizing building energy saving and structural performance, overcome the restrictions of construction site and environmental conditions on on-site construction, reduce the number of on-site construction labor, reduce construction waste and Adverse effects of construction on the environment, improving building functionality and struc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E04C5/16
CPCE04C5/165
Inventor 王明杨梁绍辉
Owner CHONGQING QIFU MACHINERY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap