The influencing factors of oil pipelines are the same as the operation

Firstly, factors affecting oil pipelines. Petroleum is a fundamental industry that provides supporting facilities and services for agriculture, transportation, energy, construction, and other industries, as well as people's lives. It plays an important role in the development of China's national economy and is one of the pillar industries in China. With the continuous development of China's petroleum industry, the scale of petroleum facilities is gradually expanding, and the design requirements for petroleum pipelines are becoming increasingly strict. As equipment for material transportation, oil pipelines play a role in connecting various equipment and related system facilities, making petrochemical plants a whole and providing important transportation for various fluids. However, in actual pipeline design work, various factors such as different types and operating conditions of gear oil pump pipelines greatly affect pipeline design. Therefore, pipeline designers need to design a pipeline that meets the requirements, taking into account various factors, especially paying attention to the precautions and measures taken in pipeline design

1. Corrosion Impact

Corrosion is the damage to pipeline materials caused by chemical reactions in the surrounding environment of gear oil pump pipelines, which greatly affects the pipeline.

. The manifestations of corrosion damage to pipelines include stress corrosion, uniform corrosion, localized corrosion, and atmospheric corrosion. Due to the different environments in which different pipeline materials are located, their own degree of corrosion also varies. The environment in which pipelines are located is generally complex and prone to change, coupled with defects in the materials themselves, making corrosion difficult to predict and control

2. Physical Damage

The physical damage of oil pipelines mainly manifests in two aspects: low-temperature brittle fracture and high-temperature failure.

. Under low temperature conditions, when the temperature of the pipeline material of the gear oil pump is lower than its brittle transition temperature, it is easy to cause a decrease in its impact toughness and lead to brittle fracture. The performance of pipeline materials can undergo malignant changes at high temperatures, such as creep failure, graphitization and tempering embrittlement of carbon steel and carbon phase steel, which can easily lead to the weakening and embrittlement of pipeline materials. At the same time, pipeline metal materials are prone to fatigue under alternating loads or temperature cycle changes, leading to metal deformation, damage, and even fracture, seriously affecting the performance of oil pipelines

3. Sealing Effect

Currently, oil pipeline sealing mainly adopts two methods: pipe flange sealing and valve sealing to prevent pipeline corrosion and leakage.

. The flange seal is composed of three parts: flange, bolt, and gasket (ring). The stiffness and sealing surface type of the flange, as well as the gasket type of the flange, have a direct impact on the sealing effect. If the pipeline undergoes displacement, it will also affect the sealing effect of the flange, thereby affecting the pipeline. Valve leakage can be divided into two types: internal leakage and external leakage. According to statistics, the release amount of valve and flange leakage is about 2/3, and the occurrence of leakage directly affects the pipeline, even causing serious consequences. Therefore, taking measures to prevent valve and flange leakage is of great significance for petroleum equipment

Secondly, what should be done when the gear pump suddenly decelerates or stops?

Methods to prevent hydraulic shock generated during deceleration or stop (such as hydraulic cylinders).

. a. A quick response can be set at the inlet and outlet of the hydraulic cylinder, and the pressure can be adjusted in the medium and low pressure systems, which are used in systems with higher working pressure such as hydraulic gantry planers, guide rail grinders, etc; In high-pressure systems, it is 125% of the higher working pressure, as used in hydraulic compressors. This can prevent the impact pressure from exceeding the above adjustment values. b. The gear pump uses a deceleration valve at the end of the hydraulic cylinder stroke, which mitigates hydraulic impact by slowly closing the oil circuit. c. Set a stroke throttle valve and a stroke collision block with two angles when converting from fast forward to work forward. The gear pump is designed with reasonable angles to prevent pressure impact caused by too fast a speed change when converting from fast forward to work forward; Alternatively, a dual speed conversion can be used to ensure that the speed conversion is not too fast. d. Install a buffer device (such as a one-way throttle valve) at the end of the hydraulic cylinder to control the oil discharge speed at the end of the hydraulic cylinder, so that when the hydraulic cylinder stops moving to the end of the cylinder, there is no impact. Vertical hydraulic press and back pressure valve (horizontal hydraulic press) are used to control the forward impact of descending or horizontal movement, and the back pressure is appropriately increased Using rubber hoses to absorb hydraulic impact energy. g. Install an accumulator to absorb hydraulic impact pressure at the location of the pipeline that is prone to hydraulic impact. h. Using a hydraulic directional valve with a double one-way throttle valve installed at the top, adjusting the one-way throttle valve appropriately can delay the directional time of the main valve core and reduce impact Properly reduce the lubrication pressure of the guide rail, for example, when the specified lubrication pressure of a certain grinder is 0.05-0.2MPa, and the lubrication pressure is adjusted to 0.2MPa, there is often a reverse impact; When the pressure drops to 0.15MPa, the impact immediately disappears. j. When the clearance between the holes of the hydraulic cylinder body is too large (when sealing the clearance), or when the seal is damaged and the working pressure is adjusted to a high level, it is easy to cause impact. The piston can be reconfigured or replaced with a new piston seal, and the working pressure can be appropriately reduced to eliminate any impact caused by this