The application skills of excavator loader in highway engineering
The basic working process of the excavator loader is loading, transportation, discharge and return of materials. Please choose different operating methods according to the object of the construction operation. Then, let's learn about the application skills of the excavator loader in highway engineering!
1. Load loose materials such as gravel and sand
In highway engineering, excavator loaders are mainly used to hold various loose materials such as gravel and sand in the mixing yard. Linear toothed buckets are used when installing the blades. Wisdom creation concepts such as quality buckets are needed. First place the bucket at the bottom of the pile, the bucket mouth is forward, the machine advances at low speed, and the bucket teeth are inserted into the pile. When the installation resistance of the bulldozer is large, the boom can be operated to swing the bulldozer bucket up and down. Thereby reducing the frictional resistance between the materials and speeding up the speed at which the materials enter the bucket until the bucket is full; then close the bucket, the bucket mouth is facing up, and use the boom to lift the bucket to a transfer position about 50cm from the ground, causing the machine to retreat and move to the discharge place.
2. Shovel up the soil below the ground
In road engineering, excavating loaders can be used to peel off the topsoil. In this case, the loader and the bulldozer operate in the same way, and it is preferable to use a straight bucket rod bucket. When installing the bulldozer, put down the bucket and rotate it to a certain bulldozer angle (10-30) with the ground. The shovel angle of grade and grade soil can be larger, and the shovel angle of grade and above soil can be smaller. Then the machine advances in I and cuts the bucket knife into the soil, and the depth of soil cutting is generally maintained at about 15-20cm. In soil that is difficult to shovel, in order to reduce the resistance of shoveling, the boom can be operated to vibrate the bucket up and down, or the angle of the shovel can be slightly changed until the bucket is full. The material is recycled after it is filled. Lift the bucket to the handling position, away from the work surface, and carry it to the unloading place. This method is also commonly used for river sand collection and for leveling sites in workshops.
3. Shovel soil
At present, stone-mixed stabilized soil is commonly used in the construction of the base layer of two-ash soil. When the stabilized soil is mixed, a loader can be used to add to the mound. When shoveling, according to the soil siltation situation and the different operating techniques of the driver, the following three different methods can be used：
1) Layered shovel method
Lower the bucket, approach the bottom of the slope, and advance at a low speed towards the mound; when the bucket is inserted into the soil to a certain depth, cooperate with the boom to lift the bucket; after the bucket teeth leave the mound, move the bucket to the transportation position. Because the insertion method is not deep, and there is a snap of lifting action after insertion, the insertion resistance is small and the work is smooth. In addition, due to the longer blade surface, a higher filling coefficient can be obtained. Because the characteristics are similar to the working method of a backhoe. It is also known as the excavator shovel method.
2) Layered shovel method
When working, the bucket leans forward slightly and is inserted from the bottom of the inclined plane. After inserting to a certain depth, lift the bucket. When the engine speed drops, disconnect the clutch to restore the engine to the speed; in the process of restoring the speed, the bucket continues to rise and is placed in a part of the soil; after the speed is restored, a second insertion is performed next. Repeat until the bucket is full or higher than the working surface. After filling the bucket, it is also possible to press the bucket slightly into the working surface to loosen the soil to facilitate the installation of the next blade. This method is suitable for occasions where the soil is hard. It is characterized by the fact that the engine is often kept in the rated working state to improve the working capacity. The operation of inserting and lifting the buckets in turn is complicated, the driver is easy to fatigue, and the clutch is easy to wear.
3) Cooperate with the blade installation method
First, the bucket is lowered to the bevel, and the loader performs the operation of loading the bucket according to the action of rotating the bucket or lifting the boom while advancing. In other words, if the bucket is inserted into the stack to a depth of about 0.2-0.5 buckets, while the loader is advancing, the bucket is operated intermittently to bounce it up, and the boom is raised until the bucket is full. After the bucket teeth leave the mound, move the bucket to the transportation position. According to the blade installation method, there is no need to insert the bucket deeply. With the cooperation of gear shearing movement, bucket tooth rotation and lifting movement, the resistance of gear shearing is greatly reduced, and the bucket is easy to fill; however, the driver is required to have a high level of operation. Please always pay attention to cleaning the bonded soil inside and outside the bucket when working. While not affecting the available capacity, increase the working resistance.
4. Clean up the earth and stone side of the blasting site
In the blasting construction of subgrade earth and stone, an excavation loader is used to clean up the blasting site. When the excavation loader is used to clean, the toothed bucket of the triangle belt needs to be replaced to improve the loading and excavation capacity. When cleaning, the particle size of the gravel after blasting shall not exceed the allowable capacity of the bucket. If it exceeds, the stone needs to be re-blasted. In addition, when the cleaning distance is within 40-100m, the excavation loader can be transported with a self-shovel. When the handling distance exceeds 100m, it needs to be carried out in cooperation with the dump truck. After the cleaning is over, the movement of the loader must be stopped outside the blasting cordon. To ensure the safety of mankind.
5. Lifting various operating tools and equipment
At road construction sites, if there is no special lifting equipment, excavating loaders can be used to lift various operating tools and equipment. For example, in the case of construction machinery that needs to be maintained or assembled as a construction site, an excavation loader is a lifting equipment that can disassemble and assemble various components. The public number Zhizao Grand View focuses on sharing relevant theoretical knowledge in the construction machinery manufacturing industry. When the excavation loader is used as a lifting equipment, the lifting load must be firmly tied, and the wire rope or hook is hung between the bucket teeth of the loader, and the center of the heavy object is in the same straight position as the center of the bucket. During operation, it must be commanded by a special person. The driver must operate carefully. When lifting, the boom is slowly raised after receiving the bucket, and the boom is slowly and gently placed during assembly. In addition, the lifting capacity of the excavator loader should be greater than the weight of the lifting heavy object to ensure the safety and reliability of lifting and prevent damage to personnel and machinery and equipment.
The above introduction is the application skills of excavator loaders in highway engineering. If you need to know more, you can contact us at any time!