First, preparation before installation

Determination of the strength of the foundation: Before the equipment is in place, the strength of the concrete of the equipment is measured. Generally, the concrete strength should be more than 60%, and the equipment can be installed in place. Small and medium-sized equipment can use the steel ball impact method. Before the large and medium-sized equipment is installed, the foundation must be pre-pressed. The weight of the pre-press is 1.2-1.5 times of the total weight and the maximum weight of the workpiece. The pre-stressed weight should be evenly added to the foundation. The pre-pressing work should be carried out. Until the foundation settlement is not observed by the water level meter. The main content is whether the basic dimensions, centerline, elevation, bolt hole coordinates, depth, etc. meet the design and construction requirements. There are unqualified areas in the basic inspection process to be dealt with, usually the strategy of dealing with the underlying defects.

Foundation line: After the foundation is accepted and the surface is clean, the line can be released. The line is measured according to the axis of the building axis, and the center line of the equipment is measured and the auxiliary reference line is measured and added on the basis of the vertical and horizontal center line. Paying attention should pay attention to straightening, straightening and accurate measurement.

Second, the construction process of mechanical installation engineering

1. Mechanical equipment anchor bolt installation

The connection between the equipment and the foundation is mainly the anchor bolt connection. The equipment is leveled by adjusting the horn, and then grouting is used to fix the equipment on the equipment foundation.

The anchor bolts can be divided into fixed anchor bolts, movable anchor bolts, expansion anchor anchor bolts and bonded anchor bolts according to the buried form. Commonly used fixed anchor bolts and movable anchor bolts. Fixed anchor bolts can be divided into three types: pre-embedded anchor bolts, reserved hole anchor bolts and anchor bolts with epoxy mortar.

2. Mounting of the horn when the mechanical equipment is installed

The horn can be used to adjust the level of the equipment, and the weight of the equipment, the working load and the pre-tightening force generated by tightening the anchor bolts can be evenly transmitted to the foundation; the elevation and level of the equipment can be achieved according to the specified requirements. The secondary grout provides sufficient operating space. The horn has two kinds of cast iron horn and steel plate horn. The shape can be divided into six types: flat horn iron, diagonal horn iron, open horn iron, open horn iron, hook head paired diagonal horn, and adjustable horn.

The equipment without horn installation is currently only used when the design documents are required. The equipment is used to level the top wire or temporary horn, and the grouting is carried out after the leveling, the load-bearing effect from the grouting layer, installation and grouting construction. The process shall be performed as required by the design documents.

3. The equipment is installed when the mechanical equipment is installed.

Once the anchor bolts and horns are ready, the equipment is in place. Before the equipment is in place, the foundation should be cleaned, and the grouting layer between the base of the equipment and the foundation should be chiseled to ensure the quality of the joint between the grouting layer and the foundation, and the paint, oil and other dirt on the bottom of the base of the equipment should be cleaned. In order to ensure the quality of the combination of the grouting layer and the base.

4. Mechanical equipment installation adjustment and grouting

1, the equipment is correct. The device is precisely adjusted by the mobile device to the plane coordinate position specified by the design, that is, the deviation between the longitudinal center line and the horizontal center line and the reference line is controlled within the design or specification.

2, equipment leveling. Equipment leveling refers to adjusting the height of the horn to the level specified by the design during installation. The level deviation is within the allowable range specified by the design or specification. The level of equipment is usually measured with a level. The test should be selected on the finishing surface of the equipment.

3. The equipment is looking for elevation. Equipment elevation is defined by adjusting the height of the horn to the height specified in the design during installation. The height deviation is within the design or related specifications.

4. Equipment grouting. Grouting between the base of the equipment and the foundation is carried out after the equipment is leveled, the anchor bolts are tightened, and each test item is qualified. The grouting material is usually selected from the design, and it is preferred to use non-shrinkage concrete or micro-expansion concrete.

5, equipment cleaning and assembly

Cleaning: Cleaning can be divided into rust and rust cleaning, grease cleaning, degreasing, hydraulic and lubrication pipeline cleaning, etc.; two stages of pickling and rinsing; commissioning and operation before equipment commissioning to ensure equipment commissioning Lubrication and oil supply.

Assembly: First, in the process of mechanical equipment installation, the electromechanical equipment assembled on site includes: coupling and fastening; coupling, clutch, brake; bearing; transmission belt; chain and gear; Secondly, after the equipment is cleaned and assembled, the mating surface and the processing surface shall be free of burrs and dirt, and the oil passage shall be clean and unobstructed. In the assembly, lubrication points that need to be filled with lubricant should be filled with a qualified and appropriate amount of lubricant according to the design specifications. Finally, the assembly operation does not allow damage to the device. When assembling large and heavy-duty parts and components, adjust the levelness or verticality in the suspended state. If necessary, install guides, and the landing should be smooth and accurate. Lubricant should be applied to the surface of the fitting.

6. Machine equipment adjustment, trial operation and completion acceptance

Adjustment and trial operation are important links in the quality of comprehensive inspection equipment manufacturing and equipment installation. They involve many professions and many personnel, and must be carefully organized and unified. The trial operation of mechanical equipment is divided into three stages. The single-unit no-load test run and the no-load joint test run are organized and implemented by the construction unit. The test run must have the required conditions and the correct test run method. The load linkage test run is organized and implemented by the construction unit.

After the completion of the mechanical equipment installation project, the completion and acceptance shall be carried out. This is the last process of the installation project. When the project acceptance is qualified and meets the requirements of the contract, design requirements and acceptance specifications, the project acceptance shall be handled immediately.

The mechanical equipment installation project combines a series of equipment into one set of equipment or one production line to form a technical equipment system and finally form a production capacity. The installation accuracy of the equipment includes the positional accuracy between the individual equipments required to ensure the correct linkage of the complete set of equipment during the installation process, the equipment manufacturing precision that can be reproduced by a single equipment through a reasonable installation process and adjustment method, and the whole set (set) The accuracy of the three aspects of the running accuracy of the equipment in operation.

Third, the main points of engineering machinery and equipment maintenance

In order to smoothly implement the project construction project, the relevant construction machinery maintenance work should be done well. details as follows: 

1. Strictly implement the current mechanical maintenance system and do regular maintenance work to ensure that the mechanical equipment is always in the best working condition. If the usage rate of some mechanical equipment is high or the failure rate is high, the tracking inspection mode can be selected. When it is found that the operation is not normal, it needs to stop in time, and the professional maintenance personnel carry out detailed inspection and take effective maintenance methods for treatment. In daily work, when the mechanical equipment is in operation, the status of mechanical lubrication should be checked regularly. If there is a problem, the lubricating oil should be added immediately to avoid the mechanical failure due to lubrication problems.

2. In the process of repairing machinery, we must not only pay attention to big problems, but also neglect small problems. We should do all kinds of maintenance work, avoid mechanical disease, minimize the loss of mechanical performance, and prevent serious impact on the progress of the project. At the same time, in the process of mechanical construction, maintenance should be carried out with equal weight. According to the degree of loss of mechanical equipment components, regular inspections should be carried out to prevent and maintain the work, and prevent serious maintenance and cost waste. It is required to apply advanced maintenance to daily mechanical maintenance, so that the engineering repair vehicle can be properly configured to maintain the machinery in time, thereby achieving the purpose of reducing maintenance cost, shortening the time and extending the service life of the mechanical equipment.

3. In order to maximize the utilization rate of construction machinery and equipment, the establishment and improvement of the mechanical management system should be carried out. At the same time, the mechanical management system and management structure should be improved, and a reasonable reward and punishment system must be established. The safety operation consciousness of the mechanical operators and the sense of responsibility can better protect the equipment, reduce human error, avoid serious mechanical wear and tear, and prevent casualties and property losses.

Fourth, the conclusion

In summary, to achieve engineering quality and efficiency goals, mechanical equipment installation and maintenance must be done. It is required to make reasonable use of construction machinery and equipment, and do all kinds of maintenance and repair work in time. Only in this way can the rapid development of the engineering construction industry be promoted. During the installation and maintenance of mechanical equipment, the staff must be required to improve the technical level of their installation and maintenance, and the quality control should be carried out throughout the entire operation process. While standardizing the installation process of mechanical equipment, it is necessary to increase the intensity of maintenance and control. Only in this way can we ensure the quality of the project and promote the rapid development of the enterprise.