Automatic rock-like sample stirrer capable of preventing dust and uniformly stirring and stirring method

Abstract

The invention discloses an automatic rock-like sample stirrer capable of preventing dust and uniformly stirring and a stirring method. The stirrer comprises a support for supporting and fixing a cylinder body; a pressurizing / pressure-relieving valve is arranged at the top of the cylinder body; a rotating shaft is mounted on the central axis of the cylinder body; the upper end of the rotating shaftis connected with an output shaft of a rotating motor; a stirring device and a threaded stirrer are fixed to the rotating shaft from top to bottom, the inclination direction of fan blades of the threaded stirrer is opposite to that of the stirring device, a solid storage hopper is arranged at the top of the cylinder body, an annular nozzle is installed on the inner wall of the cylinder body between the threaded stirrer and the stirring device, a discharge port is formed in the bottom center of the cylinder body; and a solid particle electric control sensor is arranged at a position, close tothe stirring device, in the cylinder body. According to the stirrer, dust is prevented from escaping, the stirring uniformity can be improved in the stirring process, powder lumps are prevented, automatic integration of feeding and stirring is achieved, the sample preparation efficiency and precision are improved, sample residues are reduced, and the sample quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics test devices, and relates to a full-automatic rock sample mixer and a mixing method capable of preventing dust from stirring uniformly, which can improve the uniformity of mixing, prevent dust from escaping during the process of feeding and stirring, and prevent powder clusters from appearing in the mixture . Background technique [0002] In the process of studying the physical mechanics of rock mass, due to defects such as cracks and joints in natural rock mass, high sampling cost, low production efficiency, and great randomness, it is often used to configure rock samples to study the original by analogy. rock material. In order to be able to simulate the real rock mass with a very wide variation range of strength, it is necessary to develop a similar rock-like model material with a wide range of physical and mechanical properties and stable performance control. The key to the success of...

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Problems solved by technology

In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: due to the use of different stirring equipment in the stirring process, the problem of uneven mixing and stirring of different materials often occurs, and local over-humidity occurs in the process of adding liquid Or too dry, and the phenomenon of powder clusters appears, so that the prepared samples have congenital defects, and the obtained samples do not meet or do not meet the requirements of the experiment

No matter what kind of mixing method is used, a large number of dust particles will fly out during the mixing process. After adding liquid and stirring, a large amount of material will adhere to the mixing equipment, resulting in a certain amount of material loss; at the same time, there will be uneven mixing during the mixing process. Agglomeration and other phenomena, so the samples made must have certain differences, which directly affect the accuracy of the model test of similar materials; at the same time, during the stirring process, the quality of the feeding material, the uniformity of stirring and the stirring time cannot be accurately controlled, which affects the efficiency of sample preparation. and precision

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