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Concrete on-site pumping vacuum stirring conveying pipe and construction technology

A vacuum mixing and concrete technology, which is applied to cement mixing devices, clay preparation devices, unloading devices, etc., can solve the problem of uncontrollable air content and achieve a high degree of controllable air content

Active Publication Date: 2022-03-11
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of this application solves the problem of uncontrollable air content in concrete pouring in the prior art by providing a concrete on-site pumping vacuum mixing delivery pipe and construction technology, and realizes the effect of controllable concrete exhaust

Method used

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  • Concrete on-site pumping vacuum stirring conveying pipe and construction technology
  • Concrete on-site pumping vacuum stirring conveying pipe and construction technology
  • Concrete on-site pumping vacuum stirring conveying pipe and construction technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 As shown, a vacuum mixing conveying pipe for concrete on-site pumping includes a feed hopper 100 and a pipe body 200 outlet 300. The feed hopper 100 is connected to the pipe body 200, and the feed hopper 100 is used to supply 200 into concrete; the discharge port 300 communicates with the end of the pipe body 200 away from the feeding place, and the discharge port 300 is used to discharge the concrete in the pipe body 200; the feed hopper 100 is provided with a feed valve 110, The material valve 110 is used to close and air-seal the channel between the feed hopper 100 and the pipe body 200; the discharge port 300 is provided with a discharge valve 310, and the discharge valve 310 is used to close and air-seal the discharge port 300 and the pipe body. The channel between the bodies 200; the two ends of the pipeline are sealed by valves to form an airtight environment, which is convenient for the subsequent vacuuming operation.

[0045] The tube body 200...

Embodiment 2

[0050] Such as Figure 2-Figure 5 As shown, if the pipe body 200 is installed horizontally, using a screw feeding device, when the concrete is being stirred, the pressure of the air bubbles wrapped in the concrete itself is higher than the air pressure in the pipe body 200, and they will quickly burst to achieve the purpose of defoaming, but The cost of vacuuming the equipment to a state where there is no air is too high, so there will still be air in the tube body during normal operation. When the concrete is mixed by the screw feeder, the concrete will cover the air in the pipe body 200. Although the air pressure is lower than the outside, there will still be a small amount of air entering the concrete, and this part of the concrete will form a small amount of air after entering the air. bubble. Therefore, in order to reduce or avoid the re-entry of air after defoaming, the equipment should be improved.

[0051] The axis of the pipe body 200 forms an included angle of 45-9...

Embodiment 3

[0057] Such as Figure 2-Figure 5 As shown, the discharge port 300 communicates with another opening of the exhaust part 270, the discharge port 300 extends downwards, and extends into the discharge tank 400, the discharge tank 400 has an inclined bottom The side wall, the bottom opening of the discharge port 300 is located above the lower side wall of the discharge tank 400, so that the concrete slides down to the bottom of the discharge tank 400 along the lower side wall; the bottom of the discharge tank 400 It has a discharge tank valve 430 which is used to open and close the discharge port of the discharge tank 400 ; The function of the discharge tank 400 is to buffer the concrete on the one hand, so that it is convenient to enter the pumping equipment continuously; The interior can always maintain a high degree of vacuum. On the one hand, further defoaming is carried out. On the other hand, after the concrete enters the discharge tank, the exhaust part and the discharge ...

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Abstract

The invention discloses a concrete on-site pumping vacuum stirring conveying pipe which comprises a feeding hopper and a pipe body discharging port, the feeding hopper is communicated with a pipe body, and the feeding hopper is used for feeding concrete into the pipe body; the discharging port is communicated with one end, far away from the feeding position, of the pipe body, and the discharging port is used for discharging concrete in the pipe body; the pipe body further comprises a feeding device, a first air pipe and a vacuum pump; the feeding device is used for forcing concrete to move and stir in the pipe body; the first air pipe is communicated with the space in the pipe body and used for being communicated with a vacuum pump, the vacuum pump sucks air in the pipe body, and the air pressure in the pipe body is lower than the air pressure outside the pipe body. Before concrete enters pumping equipment, vacuum bubble removal treatment is carried out. In this way, after the concrete is poured into a building structure, the controllable degree of the gas content is higher.

Description

technical field [0001] The invention relates to an auxiliary equipment for pumping concrete on site and a construction technique for pumping concrete using the equipment. Background technique [0002] Concrete is a gas-liquid-solid three-phase mixture, in which the gas exists in the hardened concrete structure as pores after the concrete hardens. Pores will reduce the overall continuity of the concrete, and stress concentration will form on the inner wall of the pore when the load is applied, and cracks will usually be formed at the stress concentration point, which will lead to a decrease in the strength of the concrete structure or even damage. In order to reduce the amount of air bubbles in the concrete, there are two ways, one is to add a defoamer, and the other is to vacuum mix the concrete. The first way, the effect is obvious during the mixing process, but when the concrete is mixed and transported by the mixer truck, the mixing of the concrete in the tank truck is s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28C5/34B28C7/16E04G21/04
CPCB28C5/34B28C7/168E04G21/04Y02W30/91
Inventor 欧志华
Owner HUNAN UNIV OF TECH
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