Pipeline Engineering Quality and Troubleshooting Methods

1、 Analysis of Quality Problems in Pipeline Engineering

China's pipeline construction enterprises have accumulated rich experience in engineering quality problems and management measures. However, in the actual quality problems and management process, many problems seriously affect the construction quality of pipeline engineering and the smooth progress of other work.

. Overall, the quality issues of pipeline engineering are mainly reflected in the following aspects. Firstly, the responsibility for quality management is unclear. Due to the complexity and long construction period of pipeline construction in construction enterprises, involving multiple departments, the quality management responsibilities are not clear or the management work overlaps. After quality management problems occur, the specific person in charge cannot be found. The management of construction enterprises attaches great importance to short-term benefits, only pursuing the maximization of enterprise profits, and neglecting the standardization of quality management construction. Secondly, the quality management system is not sound and lacks corresponding supervision mechanisms. Due to the weak awareness of quality management among the management of many construction enterprises, and even the lack of emphasis on the construction of quality management systems, the construction of quality management systems is not sound, resulting in quality management problems in the actual construction process. In addition, the lack of corresponding supervision mechanisms is also an important issue in the quality management of construction enterprises in China. Once again, the quality management of gear oil pump pipeline engineering neglects details. For example, design factors and unreasonable design can lead to problems in the connection of pipe fittings, structures, and valves, seriously affecting the quality of pipeline engineering. For example, material issues. If the material itself has defects, the pipe wall is too thin, there are sand holes, the substitute material does not meet the requirements, the sealing of valves, flanges, etc. fails, and the material ages. There are also construction operation issues. If construction personnel operate improperly or make mistakes, it often leads to problems such as overspeed, overheating, and overload operation of high-pressure materials in pipelines

2. Specific Introduction and Troubleshooting of Gear Oil Pumps

Stainless steel oil pumps are widely used for conveying lubricating media. One of the advantages of gear oil pumps is that they transport viscosity and high conveying pressure. Our company has production experience in gear oil pumps and can customize gear oil pumps suitable for different working conditions according to customer requirements.

Introduction of Gear Oil Pumps:

Gear oil pumps are suitable for conveying various lubricating liquids, with temperatures not exceeding 70 ℃. If a high temperature of 200 ℃ is required, materials can be used, with a viscosity of 5 × 10-5~1.5 × 10-3m2/S.

. This pump is not suitable for conveying corrosive, hard particle or fiber containing, highly volatile or low flash point liquids, such as gasoline, benzene, etc

Solution to gear oil pump malfunction:

(1) Add or replace lubricating oil of the required grade according to the seasonal temperature, lubricate the gear oil pump bearings or drive parts, remove foreign objects from the oil pipe, and tighten the bolts or nuts at the joints;

(2) Replace the aged or damaged gear oil pump skeleton oil seal or "O" - shaped sealing rubber ring

(3) Replace the worn gear oil pump shaft sleeve, and if there is slight wear, grind the end face flat on the flat plate. The allowable unevenness error is 0.03mm; The end face of the upper shaft sleeve is lower than the upper plane of the pump body (normal value is less than 2.5-2.6mm). If it exceeds the tolerance, a 0.1-0.2mm copper plate should be added to the lower shaft sleeve to compensate. During installation, it should be installed on the rear shaft sleeve

(4) The unloading plate and sealing ring are installed in the oil inlet chamber to maintain balance between the two shaft sleeves. The unloading plate sealing ring should have a preload of 0.5mm

(5) The guide wire elasticity of the gear oil pump should be able to simultaneously twist the upper and lower shaft sleeves towards the direction of rotation of the driven gear by a small angle, so that the machining planes of the two shaft sleeves of the main and driven gears are tightly fitted

(6) The unloading groove on the shaft sleeve of the gear oil pump is installed on one side of the low-pressure chamber, with the closed volume generated during gear meshing

(7) Before pressing in the self tightening oil seal, a layer of lubricating oil should be applied on its surface, and attention should be paid to facing the oil blocking edge towards the front cover, which cannot be installed in the opposite direction.

(8) The "right-hand" pump cannot be installed on the "left-hand" machine, otherwise it will damage the skeleton oil seal

(9) Before installing the pump cover, pour a small amount of engine oil into the pump housing and rotate the meshing gear by hand

Before installing the gear oil pump cover and tightening the bolts, the gap between the pump cover and the pump body should be checked to ensure it is between 0.3-0.6mm. If the gap is too small, the sealing ring and pressure relief component should be replaced. After installing the hydraulic oil pump, it should rotate flexibly without any jamming phenomenon

The gear oil pump is an important component that elevates the low-pressure oil in the tank to the high-pressure oil that can perform work through the rolling meshing of a pair of involute gears with the same parameters and structure. It is a power device that converts the mechanical energy of the engine into hydraulic energy. The Dongfanghong-75 tractor and Dongfanghong-60, 70T bulldozer mechanisms use CB46 gear pumps. The Dongfanghong-802/802K tractor and Dongfanghong-802KT bulldozer use CBN-E450 or CBTI-E550 gear pumps, which have high flow rate and good performance