A method for preparing microporous concrete sprinklers by dry pressing combined with vacuum atomization

An irrigation and concrete technology, applied in ceramic products, manufacturing tools, other household appliances, etc., can solve the problems of high manufacturing cost and difficult agricultural promotion, and achieve the effects of excellent hydraulic performance, large flow, and low power consumption.

Inactive Publication Date: 2019-04-23
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high manufacturing cost and difficult agricultural popularization of microporous ceramic emitters in the prior art, the purpose of the present invention is to provide a method for preparing microporous concrete emitters by dry pressing combined with vacuum atomization

Method used

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  • A method for preparing microporous concrete sprinklers by dry pressing combined with vacuum atomization
  • A method for preparing microporous concrete sprinklers by dry pressing combined with vacuum atomization
  • A method for preparing microporous concrete sprinklers by dry pressing combined with vacuum atomization

Examples

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Effect test

Embodiment 1

[0025] The process of preparing microporous concrete sprinkler by dry pressing combined with vacuum atomization method in this embodiment is as follows figure 1 Shown:

[0026]The sand excavated from the sand field is passed through 12-mesh and 18-mesh sieves in turn, and the sand with a particle size range of 1.0-1.7 mm is selected. Mix the selected sand with the cement labeled P.O32.5 in a ratio of 80:20 and pour it into the ball mill tank. Add 15 to 25 alumina balls with a diameter of 8 to 12 mm per 100 grams of the mixture. The mixture was obtained by mixing for 1.0 hour using a tumble ball mill. Pour the mixture into the cement mortar mixer, and spray the silica sol with a concentration of 10% while stirring, and spray 35 grams of silica sol per 100 grams of cement. After the silica sol is sprayed, continue to stir the mixture for 15 minutes, then pour it into a mold and mold it into an emitter with a pressure of 10 MPa, and open the mold after holding the pressure for ...

Embodiment 2

[0029] The process of preparing microporous concrete sprinkler by dry pressing combined with vacuum atomization method in this embodiment is as follows figure 1 Shown:

[0030] The sand excavated from the sand field is passed through 18-mesh and 30-mesh sieves in turn, and the sand with a particle size range of 0.6-1.0 mm is selected. Mix the selected sand with the cement labeled P.O32.5 at a ratio of 82:18 and pour it into the ball mill tank. Add 15 to 25 alumina balls with a diameter of 8 to 12 mm per 100 grams of the mixture. Mixed for 0.5 hour with a roller ball mill to obtain a mixture. The mixture is poured into a cement mortar mixer, and the silica sol with a concentration of 15% is sprayed while stirring, and 30 grams of silica sol is sprayed per 100 grams of cement. After the silica sol is sprayed, continue to stir the mixture for 20 minutes, then pour it into a mold and mold it into an emitter with a pressure of 8 MPa, and open the mold after holding the pressure f...

Embodiment 3

[0033] The process of preparing microporous concrete sprinkler by dry pressing combined with vacuum atomization method in this embodiment is as follows figure 1 Shown:

[0034] The sand excavated from the sand field is passed through 30-mesh and 80-mesh sieves in turn, and the sand with a particle size range of 0.18-0.6 mm is selected. Mix the selected sand with the cement labeled P.O42.5 in the ratio of 82:18 and pour it into the ball mill tank. Add 15 to 25 alumina balls with a diameter of 8 to 12 mm per 100 grams of the mixture. Mixed for 0.5 hour with a roller ball mill to obtain a mixture. Pour the mixture into the cement mortar mixer, and spray the silica sol with a concentration of 15% while stirring, and spray 25 grams of silica sol per 100 grams of cement. After the silica sol is sprayed, continue to stir the mixture for 15 minutes, then pour it into a mold and mold it into an emitter with a pressure of 5 MPa, and open the mold after holding the pressure for 20 seco...

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Abstract

The invention discloses a method for preparing a microporous concrete emitter through combination of dry pressing and vacuum atomization. According to the method, cement and sand are adopted as raw materials, a silica sol is adopted as a mold pressing adhesive, a microporous concrete billet is prepared by using a dry pressing method, and an emitter billet is subjected to curing by using a vacuum atomization and humidification method so as to finally obtain the microporous concrete emitter. According to the present invention, by regulating the cement content in the raw materials, the particle size of the sand, and the vacuum atomization maintenance process, the opening porosity of the microporous concrete emitter can be effectively regulated so as to achieve the accurate control of the seepage amount of the emitter; the manufacturing cost is much lower than the cost of the microporous ceramic emitter, and the performance test results show that the microporous concrete emitter has the same excellent mechanical property and the same excellent water permeability as the microporous ceramic; and the method has advantages of cheap and easily-available raw materials, simple and easy-performing curing process, high opening porosity, stable mechanical property, excellent water permeability, and the like.

Description

technical field [0001] The invention belongs to the technical field of emitter preparation, and in particular relates to a method for preparing a microporous concrete emitter by dry pressing combined with vacuum atomization. Background technique [0002] Water resource crisis and food security are major issues facing our country in the 21st century. Water-saving and energy-saving irrigation methods are an inevitable choice to alleviate the water resource crisis and ensure food security. At the end of the last century, the emergence of the plastics industry led to the rapid development of various water-saving irrigation technologies. However, plastic infiltration irrigation products have their insurmountable shortcomings: (1) The manufacturing process is complicated; (2) It is easy to age and has a short service life; (3) It has poor hydrophilicity and low compatibility with soil, and it is difficult to discharge residual water. It is easy to freeze and crack in winter; (4) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/26C04B38/00C04B40/02B28B3/00B28B11/24
CPCB28B3/00B28B11/245C04B28/26C04B40/0272C04B2111/00284C04B2201/50C04B14/068C04B7/02C04B14/303C04B38/0003C04B38/0074C04B38/0054C04B40/024
Inventor 杨建国李向明许景辉甘学涛
Owner NORTHWEST A & F UNIV
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