The utility model relates to an equipment for injecting additives into a crude oil pipeline, in particular to an injection device for crude oil drag reducer.

Background technology:

When crude oil is transported in the pipeline, the flow of crude oil in the pipeline is limited due to the existence of friction resistance, which results in the decrease of pipeline transportation efficiency and increase of energy consumption. Crude oil drag reducer is a kind of chemical additive widely used in crude oil pipeline transportation. It can reduce the flow resistance by restraining the turbulence of oil in the flow, effectively improve the pipeline transportation, reduce the pipeline pressure, save energy, and improve the safety factor of pipeline operation.

At present, the heavy oil in some oilfields in our country has a high content of gum and asphaltene, which has the characteristics of high viscosity, high wax content, high pour point and poor fluidity, which makes the flow resistance in the transportation process larger. It is not only unable to improve the current situation, but also greatly increases the transportation cost. Because of the quick effect of crude oil drag reducer, the cost is often low Popular.

At present, there are more and more crude oil input pipelines, various oil depots and transfer battlefields are established correspondingly, and the application of crude oil drag reducer is also increasing, so it needs a kind of equipment to inject drag reducer into the crude oil pipeline. Generally, the discharge device of drag reducer has only one way, so when the equipment is damaged or needs maintenance, it needs to stop work for maintenance or replacement, which affects the work At the same time, in order to reduce the number of intermediate pump station and the area of equipment, and save the operation cost of the enterprise, it needs a device with compact structure, convenient installation, simple operation and high working efficiency.

Technical implementation elements:

The utility model aims to provide a crude oil drag reducer filling device with compact structure, convenient installation, simple operation and high working efficiency.

The technical purpose of the utility model is realized by the following technical scheme: a filling device of crude oil drag reducer, including a discharging mechanism and a feeding mechanism, a discharging mechanism including a bracket and a feeding tank fixedly connected on the bracket, the bottom end of the feeding tank fixedly connected with a discharging pipe, the end of the discharging pipe fixedly connected with a gear pump, and the gear pump fixedly connected with a conduit, The conduit is provided with a first discharge port and a second discharge port, the first discharge port and the second discharge port are fixedly connected with the same and parallel feeding mechanism, the feeding mechanism includes a feeding pipe, the feeding pipe is sequentially connected in series with a feeding ball valve, a metering pump and a control valve, and the top of the feeding pipe is connected with an injection pipe.

By adopting the above scheme, the gear pump pumps the crude oil drag reducer in the feeding tank into the conduit through the discharge pipe, closes the liquid inlet ball valve, metering pump and control valve of one of the feeding mechanisms fixed on the first discharge port and the second discharge port, and opens the liquid inlet ball valve, metering pump and control ball valve of the other feeding mechanism, so that the crude oil drag reducer in the conduit passes through the feed pipe It enters into the injection pipe and then into the oil pipeline; when the feeding mechanism in operation is damaged or needs to be repaired, close its feeding mechanism and open another feeding mechanism to inject crude oil drag reducer into the oil pipeline. At this time, there is no need to stop work for repair or replacement, which improves the working efficiency. Moreover, the equipment is compact in structure, convenient in installation and simple in operation.

The bottom end of the gear pump, the conduit and the metering pump is provided with a bench, which includes a base plate, four ends of the base plate are fixedly connected with four vertical support columns, the support column is slidably connected with a support plate, and the gear pump, the conduit and the metering pump are fixedly connected with the support plate.

By adopting the above scheme, the gear pump, conduit and metering pump are fixedly connected to the support plate, and the support plate is slidably connected to the bench, so as to facilitate the adjustment of the height of the gear pump, conduit and metering pump. A scale is arranged on the outer side of the support column.

By adopting the above scheme, a scale is arranged on the outer side of the support column, so as to check whether the adjusted support plate is on the same horizontal plane.

A wedge-shaped mechanism is arranged between the base plate and the support plate. The wedge-shaped mechanism comprises an upper wedge-shaped block and a lower wedge-shaped block. The upper surface of the upper wedge-shaped block is fixedly connected with the support plate through bolts, and the lower surface of the upper wedge-shaped block is butted with the upper surface of the lower wedge-shaped block.