阅读说明：本技术 粉状速凝剂一种添加方式及设备技改方案 (Adding mode and equipment technical improvement scheme of powdery accelerator ) 是由 张自翔 张振群 于 2019-03-21 设计创作，主要内容包括：本发明提供粉状速凝剂一种添加方式及配套设备技改方案,其主要目的在于克服粉状速凝剂不能用于湿式喷射混凝土施工和粉状速凝剂只能在干式喷射机加料口添加的缺陷。技术核心是：为粉状速凝剂适用于干、湿式喷射混凝土促凝提供创造性新颖技术。特别是现场配制液体速凝剂、不改变喷射机主体结构即可直接使用粉状速凝剂,进行喷射混凝土施工。该方案工艺简单、新增设备投资小,实施后具备突出的实用性,特别是在产品包装、存储、运输等方面综合收效显著。(The invention provides a technical improvement scheme of an adding mode and matched equipment of a powdery accelerator, and mainly aims to overcome the defects that the powdery accelerator cannot be used for wet sprayed concrete construction and can only be added at a charging opening of a dry sprayer. The technical core is as follows: provides a creative novel technology for the powdery accelerator suitable for accelerating the setting of dry and wet sprayed concrete. In particular, the liquid accelerator is prepared on site, and the powdery accelerator can be directly used without changing the main structure of the spraying machine for spraying concrete construction. The scheme has the advantages of simple process, small investment of newly added equipment, outstanding practicability after implementation, and remarkable comprehensive effect particularly in the aspects of product packaging, storage, transportation and the like.)

1. In order to overcome the defects that the powdery accelerator can not be directly used for wet-type sprayed concrete construction and can only be added at the charging hole of a dry-type spraying machine, the invention adopts the technical improvement scheme of the following addition mode:

firstly, modifying a liquid storage cylinder of a wet type sprayer or additionally installing a powder-liquid mixing and stirring tank, mixing a powdery accelerator with water in a field according to a proportion to prepare a suspension feed liquid, and pumping the mixed feed liquid to a spraying gun head of the wet type or dry type sprayer by an additive pump to finish the accelerator adding process; and a powder storage tank is additionally arranged on the wet-type sprayer, and the powder accelerator is conveyed to a spray gun head of the wet-type sprayer by adopting compressed air or a diaphragm pump and is mixed with sprayed concrete to play a role in accelerating coagulation.

2. The solution (1) is not limited to the type of powder-liquid mixing and stirring equipment and the mixing method.

3. The solution of claim 1 is not limited to the differences in the construction and the materials of construction of the spray tips of the wet-jet machine.

Technical Field

The invention relates to an addition mode and a matching equipment technical improvement scheme of an accelerator (hereinafter referred to as accelerator) powder product for sprayed concrete. Belongs to the field of innovation of a using method of a powdery accelerator product.

Background

The sprayed concrete is divided into a dry type operation process and a wet type operation process, the traditional dry type spraying process is simple in equipment and easy to operate, but the sprayed concrete is gradually replaced by the wet type spraying process due to the defects of more rebound, large dust, serious later strength loss and the like.

The liquid accelerator is required to be used for accelerating the coagulation of wet sprayed concrete at present, the solid content of the liquid accelerator is about 40 percent, a large amount of water is not economical to be transported from a factory to a construction site, the packaging cost is high, and the storage period is short. Therefore, how to apply the powdery accelerator to accelerating the setting of wet sprayed concrete has wide social benefits in the research and development of process technology and mechanical equipment.

Disclosure of Invention

The invention provides a technical improvement scheme of an adding mode and matched equipment of a powdery accelerator, and mainly aims to overcome the defects that the powdery accelerator cannot be used for wet sprayed concrete construction and can only be added at a charging opening of a dry sprayer.

In order to solve the defect problems, the invention adopts the technical improvement scheme of the following addition mode:

the scheme is that a liquid storage cylinder of a wet sprayer is modified or a powder-liquid mixing and stirring tank is additionally arranged, so that the powdery accelerator is mixed with water in a certain proportion on site to prepare a suspension feed liquid, and the suspension feed liquid is pumped to a spraying gun head of the wet sprayer or a dry sprayer by an additive pump to complete the accelerator adding process. The scheme is characterized in that: the liquid accelerator suspension feed liquid is prepared on site, and the powdery accelerator can be directly used without changing the main structure of the spraying machine for spraying concrete construction.

And a powder storage tank is additionally arranged on the wet-type sprayer, and the powder accelerator is conveyed to a spray gun head of the wet-type sprayer by adopting compressed air or a diaphragm pump and is mixed with sprayed concrete to play a role in accelerating coagulation. This scheme need install the powder storage tank additional and reform transform the injection machine and spray the rifle head, and the advantage is: the powdery accelerator is directly used for promoting the sprayed concrete to be solidified, the concrete rebound rate is lower, and the later strength loss is also smaller.

Detailed Description

The invention has simple technical improvement process and small investment of newly added equipment, and provides a creative novel technology for the powdery accelerator for accelerating the setting of dry and wet sprayed concrete. The scheme has outstanding practicability after popularization and implementation, and particularly has remarkable comprehensive effect in the aspects of product packaging, storage, transportation and the like. The key point of implementation and popularization of the scheme II lies in research and development of a spray gun head of a wet-type spraying machine, and the spray gun head needs to meet the process requirements of uniform addition and dosage adjustment of a powdery accelerator in sprayed concrete.