Today, a large number of specialized equipment has been created to improve the territory, transport materials and carry out construction work. Technological capabilities can be significantly expanded through the use of powerful attachments.
Description
The hydraulic hammer on the basis of the excavator is designed for breaking rock solid rocks, frozen soil, road surfaces, structures based on reinforced concrete. In the process of translational movements, the device destroys the surface due to frequent impacts. The excavator may have a tracked or wheeled system. Due to the versatility of equipment such as a hydraulic hammer, it can be used on equipment of both domestic and foreign production, as well as mounted in addition to the bucket.
Specifications
The hydraulic hammer on the basis of the excavator is selected in accordance with the required characteristics, which include the frequency of impacts, shock energy and mass. With an increase in the strength of the structure and surface, a more powerful and heavy version of the tool is selected, while its weight should not exceed a tenth of the mass of the excavator itself.
The equipment is mounted instead of a front-end loader or excavator bucket and connected to the hydraulic system. The use in the cold season is quite common in order to simplify the excavation. A hydraulic hammer based on an excavator, the photo of which is presented above, can significantly accelerate the task, which is especially important when eliminating accidents in hidden underground utilities, when the term for the resumption of water and heat supply directly depends on the speed of work. One cannot do without a hydraulic hammer when developing frozen rocks and creating holes for mounting piles.
Design
The hydraulic hammer on the basis of the excavator consists of three blocks, which are placed in a shock-resistant, robust housing:
- peaks are a working tool that can have a different shape depending on the purpose, for example, conical or in the form of a chisel and scapula;
- a piston assembly with a working fluid that provides reciprocating movement of the piston;
- a nitrogen chamber having a valve for changing the pressure and total amount of gas.
Nitrogen is necessary for the formation of a high speed of the working tool, it is supplied under pressure to the upper chamber, after which the fluid pressure in the piston system decreases.
An hydraulic hammer based on an excavator, the technical characteristics of which are selected in accordance with the task, is subject to dynamic constant loads and works in difficult conditions. Over time, this leads to the destruction of the basic elements. An important factor is the constant effect of tensile and compressive stress on the hydraulic hammer based on the excavator. The latter has an intense effect with high surface resistance at the very beginning of the impact. Tensile stress occurs due to the large weight of the movable elements.
Features
A hydraulic hammer based on a backhoe loader is usually installed in place of a bucket or stick using an intermediate element (mounting plate or adapter), in the latter case the hammer is connected to the hydraulic line of the bucket drive. In case of insufficient cross-section of the drain line, an additional line must be laid in the tank directly from the hammer.
Mounting in place of the bucket is more rational, as this provides a greater number of connection options and an increase in operating capabilities. In the absence of a backup section, it is possible to connect to the supply line of the drive of the working part.
An increase in functionality is possible due to the use of twin hydraulic pumps that feed the working composition through distributors to the equipment drives. In this case, regardless of the selected type of connection, the drain line is bypassed the hydraulic apparatus and valves. Connection with a common line is made in front of the filters at the entrance to the tank. If this rule is not observed, hydraulic losses contribute to an increase in the temperature of the oil and a decrease in its viscosity, respectively, the number of internal overflows increases, the number of shocks and their energy drop sharply.