Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Air speed control device used in plastic cracking test of concrete

A cracking test, wind speed control technology, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of unstable wind speed, different wind speed, deviation of test results, etc., to improve the accuracy and repeatability, solve the problem of wind speed Effects of unstable and uneven problems

Active Publication Date: 2013-03-13
JIANGSU SOBUTE NEW MATERIALS
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the wind sources provided to the surface of concrete samples are fans, but the wind speed provided by the fans is unstable, and the wind speeds at different positions of the fans are different, resulting in deviations in test results and affecting concrete. The correct evaluation of plastic cracking performance, so it is particularly important to achieve effective control of wind speed

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
  • Air speed control device used in plastic cracking test of concrete
  • Air speed control device used in plastic cracking test of concrete
  • Air speed control device used in plastic cracking test of concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The wind speed control device of the present invention includes a wind source and a loop pipe connected with the wind source. The wind source is the centrifugal blower 1. The loop pipeline includes a pipeline, a tee 3 connected to the air source, and an elbow 5 connecting the pipeline into a circuit. The pipeline is a PVC pipe 4 with a nominal outer diameter of 100-150 mm. The sky round place connector 2 is connected. There is more than one loop pipeline air outlet on the loop pipeline, and there are several evenly arranged air outlet holes on the loop pipeline air outlet. There are 2 to 6 rows of air outlet holes, and each row has a diameter of 8 to 10mm. The number is There are 5-15 large air outlet holes 8 and 5-15 small air outlet holes 7 with a diameter of 4-6mm, and the large air outlet holes 8 and the small air outlet holes 7 are arranged at intervals. An air outlet pipe 6 is connected to the air outlet of the loop pipe. The shape of the air outlet pipe 6 is Z-...

Embodiment 2

[0032] The centrifugal blower 1 in Example 1 is changed, the model and main performance parameters of the centrifugal blower are shown in Table 3, and the rest of the configuration remains unchanged. At the same time, the wind speed tester is used to test the wind speed at the outlet 9 of the air duct. The wind speed test results of the wind speed control device are shown in Table 4.

[0033]

[0034] table 3

[0035]

[0036] Table 4

[0037] Through the comparison of the wind speed in the above two methods of Example 1 and Example 2, it is found that different types of blowers have a certain influence on the wind speed, and the influence of flow rate and total pressure is dominant, so in the actual application process, you can according to your own needs. , choose different types of blowers to get the required wind speed.

Embodiment 3

[0039] In Example 2, the angle between the upper surface of the air outlet 9 of the air outlet pipe and the horizontal plane is changed to 10.5°, and other configurations remain unchanged. At the same time, the wind speed tester is used to test the wind speed at the outlet 9 of the air duct. The wind speed test results of the wind speed control device are shown in Table 5.

[0040]

[0041] table 5

[0042] Through the comparison of the wind speed in the above two ways of embodiment 2 and embodiment 3, it is found that the change of the angle between the upper surface and the lower surface of the air outlet 9 can change the wind speed and obtain the required wind speed.

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
lengthaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

The invention discloses an air speed control device used in a plastic cracking test of concrete. The device comprises an air source, wherein the air source is connected with a return pipeline for uniformly mixing air; the return pipeline is provided with more than one return pipeline air outlet; and the return pipeline air outlet is provided with a plurality of air outlet holes which are formed uniformly and is connected with an air outlet pipe (6). The air speed at the air outlet is varied by varying the model number of a centrifugal blast blower and the angle between the upper surface of the outlet of the air outlet pipe and a horizontal plane, so that effective control over the air speed is realized, the problems of instable and non-uniform air speed caused by a fan are solved and the accuracy and repeatability of a test result are enhanced. The air speed control device can be used in the plastic cracking test of the concrete and a water evaporation test of the concrete in a plastic state, such as the effects of different curing modes and curing agents on the water evaporation of the concrete.

Description

technical field [0001] The invention relates to a wind speed control device, in particular to a wind speed control device for plastic cracking test of concrete. Background technique [0002] High performance concrete (HPC) is a new type of high-tech concrete. Due to its excellent properties, such as high strength, high durability, high workability, and high fluidity, it has been used in many important projects. a wide range of applications. However, in practical engineering applications, cracks, especially early cracks, are common problems in modern concrete structures, which seriously affect the safety and durability of concrete structures. [0003] Plastic shrinkage cracks are an important part of early cracks. Fresh concrete under harsh conditions (high temperature, low humidity, strong wind and direct sunlight, etc.) is likely to cause rapid evaporation of moisture on the concrete surface, and lead to the generation of plastic shrinkage cracks in concrete. Therefore, ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N17/00
Inventor 刘建忠李长风刘加平阳知乾吕进
Owner JIANGSU SOBUTE NEW MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com