Anhui Yulong New Material Technology Co., Ltd. is a company mainly engaged in new materials. Our company produces water-retaining tackifiers. This product has excellent water retention, workability, pumpability and adaptability. It can improve the water retention of concrete and mortar, avoid segregation and bleeding; improve the sensitivity of water-reducing agents and improve the anti-sag properties of accelerating agents. Used in the compounding and synthesis of water reducing agents and accelerating setting agents, it can not only improve product performance but also reduce production costs.
Working principle and structural characteristics
The concrete mixer truck (hereinafter referred to as the mixer truck) is manufactured by It is composed of two major assemblies: chassis and upper body. The upper part consists of the mixing drum, sub-frame, feeding and discharging device, control system, hydraulic system, electrical system, water supply system and guardrail. The specific structure is shown in the figure below:
(1) Working principle
Using the built-in The blades continuously forcefully stir the concrete so that it does not solidify within a certain period of time (no more than 90 minutes), so that the mixer truck can still meet the usage requirements after arriving at the construction site.
(2) Structural features
1. Mixing drum
The mixing drum is a key component of the entire mixing truck. As a container for storing concrete, it plays a decisive role in preventing it from solidifying and segregating. It consists of a mixing drum, a supporting wheel, etc.
The cylinder is welded by a front cone section, a rear cone section, a cylindrical section, a head, a blade, a feed cone, a raceway, etc. The front end is connected with the reducer, and the rear end is supported on the subframe through supporting wheels. The supporting wheel plays the role of supporting the drum body and is composed of a support, a bearing seat, a shaft, a bearing, etc.
The mixing cylinder is made of high-strength steel plates and the blades are made of high-strength fine-grained alloy steel (its wear resistance is 1.6 times that of Q345), with Higher wear resistance. The whole head is formed by spinning at one time and has sufficient rigidity and strength after welding with the reinforcing plate.
The small feeding cone directly affects the feeding speed of the entire vehicle. If the speed is too fast, segregation will occur, and if the feeding speed is too slow, it will affect the work. efficiency. Therefore, the feeding cone is designed in a funnel shape with a large diameter, and the feeding speed is maintained at 3.2m3/min, which can ensure smooth feeding and prevent concrete from overflowing.
The raceway is a forged piece and is forged as a whole. After the entire cylinder is welded, the outer ring is processed to ensure coaxiality requirements.
The optimized design of the mixing drum has reliable structural rigidity, good wear resistance, smooth inlet and outlet, extremely low residual content, and can be used for mixing It can also stir and transport ready-mixed concrete without discharging and segregation, ensuring the homogeneous performance of concrete.
2. Sub-frame
The sub-frame of the mixer truck is the main load-bearing part. Almost all the loads during operation are supported by it. In addition, the impact loads caused by road bumps and acceleration and deceleration during driving put high demands on the structure of the subframe.
The entire subframe consists of the main beam, the front support frame, and the back support frame.
The main beam adopts an overall box-shaped structural beam, which fundamentally enhances its torsion resistance, bending resistance, and tensile resistance, ensuring the rigidity requirements on both sides. Auxiliary cross beams are installed between the main beams to adjust the rigidity of each section of the main beam so that the load is more evenly distributed along the entire length of the subframe.
In the process of driving, it is inevitable to encounter special circumstances and require emergency braking. The inertia force caused by this is very large, coupled with the stirring The barrel itself has a certain inclination, so the load borne by the front stage of the subframe is relatively much greater, and this part of the load is mainly added to the six bolts connecting the reducer and the front support seat. In order to prevent the bolts from being sheared, If an accident occurs, a thrust stop should be installed on the front support platform so that the bolts are not affected by shear force and ensure the safety of the vehicle during operation.
Grouting mortar is generally special mortar, and dry mortar includes special mortar and ordinary mortar.
Grouting mortar is divided into: grouting material, self-leveling material, grouting material, etc. The salient features are fluidity and self-healing. There are many types of dry mortar. , such as: caulking agent, adhesive, putty, insulation mortar, etc.
Mortar: a binding material used in building bricks. It is made of a certain proportion of sand and cementing materials (cement, lime plaster, clay, etc.) mixed with water. It is also It’s called mortar, also called mortar.
Mortar is made of cementitious materials (cement, lime, clay, etc.) and fine aggregate (sand) mixed with water. Commonly used ones include cement mortar, mixed mortar (or cement-lime mortar), lime mortar and clay mortar.
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