Bidirectional auxiliary pump pipeline and oil supply system

Abstract

The application relates to a bidirectional auxiliary pump pipeline and an oil supply system, the bidirectional auxiliary pump pipeline comprising an auxiliary pipeline, an oil return pipeline, two four-way valves and an auxiliary pump, the auxiliary pipeline being sequentially provided with a first four-way valve, the auxiliary pump and a second four-way valve, the A interfaces and the B interfaces of the two four-way valves being communicated with the auxiliary pipeline, the oil return pipeline comprising a first half section and a second half section, the two ends of the first half section being communicated with the C interfaces of the two four-way valves, and the two ends of the second half section being communicated with the D interfaces of the two four-way valves. The oil supply system comprises a main pipeline, a communication pipeline, a main pump and the bidirectional auxiliary pump pipeline. Compared with the prior art, the bidirectional auxiliary pump pipeline provided by the application has the bidirectional oil conveying capacity of the auxiliary pipeline under the condition that the auxiliary pump can only convey oil in one direction, a small oil tank can be connected on the auxiliary pipeline for daily use, the function of the auxiliary pump is expanded, and the utilization rate of the auxiliary pump is improved.

Description

Technical Field

[0001] This invention relates to the field of oil supply technology, and in particular to a bidirectional auxiliary pump pipeline and oil supply system. Background Technology

[0002] Any enterprise or unit used to receive, store, and distribute crude oil or crude oil products is called an oil depot. Oil depots also refer to specialized equipment used for storing oilseeds, as oilseeds have specific characteristics and are stored in corresponding oil depots. Oil depots are the link coordinating crude oil production, crude oil processing, refined oil supply, and transportation; they are the base for national petroleum reserves and supply, and are of considerable importance to ensuring national defense and promoting the rapid development of the national economy.

[0003] The main pump used for oil supply currently lacks self-priming capability. Therefore, during startup, a smaller auxiliary pump is needed to evacuate the main pump to bring it to the required starting condition before it can be started. Once the main pump is running normally, the auxiliary pump can be stopped.

[0004] The existing auxiliary pump is only used to start the main pump and then becomes idle. It has a single function and low utilization rate. Summary of the Invention

[0005] In view of this, it is necessary to provide a bidirectional auxiliary pump pipeline and oil supply system to solve the technical problem that the auxiliary pump used to start the main pump in the prior art has a single function and low utilization rate.

[0006] This invention provides a bidirectional auxiliary pump pipeline and oil supply system. The bidirectional auxiliary pump pipeline includes: a secondary pipeline, a return oil pipeline, two four-way valves, and an auxiliary pump. Along the driving direction of the auxiliary pump, a first four-way valve, an auxiliary pump, and a second four-way valve are arranged sequentially on the secondary pipeline. The A and B ports of the two four-way valves are respectively connected to the secondary pipeline. The return oil pipeline includes a first half and a second half. The two ends of the first half are respectively connected to the C ports of the two four-way valves, and the two ends of the second half are respectively connected to the D ports of the two four-way valves.

[0007] Furthermore, it also includes a first valve and a second valve. Along the driving direction of the auxiliary pump, the auxiliary pipeline is sequentially arranged with the first valve, the first four-way valve, the auxiliary pump, the second four-way valve, and the second valve.

[0008] Furthermore, it also includes a refueling pipeline and a third valve. One end of the refueling pipeline is connected to the auxiliary pipeline located between the auxiliary pump and the second four-way valve, and the other end is used for external fuel supply. The third valve is arranged on the refueling pipeline to control the opening and closing of the refueling pipeline.

[0009] Furthermore, it also includes a first filter installed on the secondary pipeline, which is located between the first four-way valve and the secondary pump.

[0010] The oil supply system includes: a main pipeline, a connecting pipeline, a main pump, and a bidirectional auxiliary pump pipeline. The main pump is located on the main pipeline. One end of the connecting pipeline is connected to the auxiliary pipeline located between the first four-way valve and the auxiliary pump, and the other end of the connecting pipeline is connected to the main pipeline located between the main pump and the oil outlet of the main pipeline.

[0011] Furthermore, it also includes a fourth valve and an oil-gas separator installed on the connecting pipeline.

[0012] Furthermore, it also includes a fifth valve and a sixth valve installed on the main pipeline. The fifth valve is located between the oil inlet end of the main pipeline and the main pump, and the sixth valve is located between the connecting pipeline and the oil outlet end of the main pipeline.

[0013] Furthermore, a second filter is installed on the main pipeline, located between the fifth valve and the main pump.

[0014] Furthermore, it also includes a flow meter installed on the main pipeline, located between the connecting pipeline and the sixth valve, which is a flow regulating valve.

[0015] Furthermore, it also includes a sampler installed on the main pipeline, located between the flow meter and the sixth valve.

[0016] Compared with the prior art, the bidirectional auxiliary pump pipeline provided by the present invention, by setting two four-way valves and a return oil pipeline, enables the auxiliary pipeline to have bidirectional oil delivery capability under the condition that the auxiliary pump can only deliver oil in one direction. Small oil tanks can be connected to the auxiliary pipeline for daily use, which expands the function of the auxiliary pump and improves the utilization rate of the auxiliary pump.

[0017] The auxiliary pump of the oil supply system provided by this invention can not only be used to start the main pump, but also has an auxiliary pipeline independent of the main pipeline, and has its own oil transportation capacity, making it more comprehensive than existing auxiliary pumps.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 is a schematic diagram of an embodiment of the bidirectional auxiliary pump pipeline provided by the present invention; Figure 2 for Figure 1 Oil flow diagram when the bidirectional auxiliary pump pipeline supplies oil to the outside; Figure 3 for Figure 1 Oil flow diagram when the bidirectional auxiliary pump pipeline receives oil inwards; Figure 4 This is a schematic diagram of another embodiment of the oil supply system provided by the present invention; Figure 5 for Figure 4 Oil flow diagram during startup of the main pump of the central oil supply system; Figure 6 for Figure 4 Oil flow diagram during normal oil supply of the central oil supply system. Detailed Implementation

[0020] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0021] Please see Figure 1 and Figure 4 This invention provides a bidirectional auxiliary pump pipeline and oil supply system. This bidirectional auxiliary pump pipeline and oil supply system can be applied in the oil transportation field to expand the functionality of the auxiliary pump.

[0022] It should be noted that the bidirectional auxiliary pump pipeline and oil supply system of the present invention are used, but not limited to, the oil transportation field, and can also be applied to other liquid transportation systems that require a small auxiliary pump to start a large main pump. In this invention, only the application of the bidirectional auxiliary pump pipeline and oil supply system in the oil transportation field is described as an example. The principle of the bidirectional auxiliary pump pipeline and oil supply system applied to other liquid transportation fields is essentially the same as that applied to the oil transportation field, and will not be described in detail here.

[0023] Please see Figure 1 This bidirectional auxiliary pump pipeline includes an auxiliary pipeline 11, a return oil pipeline 12, a first four-way valve 21, a second four-way valve 22, and an auxiliary pump 3. Along the drive direction of the auxiliary pump, the first four-way valve 21, the auxiliary pump 3, and the second four-way valve 22 are sequentially arranged on the auxiliary pipeline 11. The A and B ports of the two four-way valves are respectively connected to the auxiliary pipeline 11. The return oil pipeline includes a first half-section 121 and a second half-section 122. The two ends of the first half-section 121 are respectively connected to the C ports of the two four-way valves, and the two ends of the second half-section 122 are respectively connected to the D ports of the two four-way valves.

[0024] Besides starting the main pump, the auxiliary pump 3 can also be used for other purposes using this bidirectional auxiliary pump pipeline. For example, the oil storage tanks in an oil depot are very large, and the output flow of the main pump connecting these tanks is also very large, making it unsuitable to use the main pump to refuel the working vehicles in the oil depot. Therefore, small oil storage tanks, 7000L tank trucks, or 12000L refueling trucks can be set up to store fuel for the working vehicles, and the small oil storage tanks can be connected to the left end of the auxiliary pipeline 11, while the right end of the auxiliary pipeline 11 can be connected to external refueling equipment, such as fuel dispensers or refueling trucks. Figure 2 As shown, the A and B ports of the two four-way valves are connected. Driven by the auxiliary pump 3, the fuel in the small storage tank, 7000L tanker truck, or 12000L refueling truck flows to the refueling equipment via the auxiliary pipeline 11, as indicated by the arrows, for external refueling. When it is necessary to replenish the fuel in the small storage tank, 7000L tanker truck, or 12000L refueling truck, as... Figure 3 As shown, the A and D ports of the two four-way valves are connected, and the B and C ports are connected. Driven by the auxiliary pump 3, the external oil flows in the direction shown by the arrow, flowing from the right end into the auxiliary pipeline 11, passing through the first half section 121, the middle section of the auxiliary pipeline 11, the second half section 122, and finally flowing from the left end of the auxiliary pipeline 11 into the small oil storage tank.

[0025] Under the condition that the auxiliary pump 3 can only transport oil in one direction, the auxiliary pipeline 11 is equipped with bidirectional oil transport capability. Small oil tanks can be connected to the auxiliary pipeline 11 for daily use, which expands the function of the auxiliary pump 3 and improves the utilization rate of the auxiliary pump 3.

[0026] See you again Figure 1 In some embodiments, the secondary pipeline 11 is further provided with a first valve 41 and a second valve 42. That is, along the driving direction of the secondary pump 3, the secondary pipeline 11 is sequentially arranged with a first valve 41, a first four-way valve 21, the secondary pump 3, a second four-way valve 22, and a second valve 42. The first valve 41 and the second valve 42 are used to control the opening and closing of both ends of the secondary pipeline 11, respectively.

[0027] In some embodiments, a refueling pipeline 13 and a third valve 43 are also provided. One end of the refueling pipeline 13 is connected to the auxiliary pipeline 11 located between the auxiliary pump 3 and the second four-way valve 22, and the other end is used for external oil supply. The third valve 43 is arranged on the refueling pipeline 13 to control the opening and closing of the refueling pipeline 13.

[0028] In this embodiment, by setting up the refueling pipeline 13, refueling and replenishment can be separated. That is, when refueling externally, the first valve 41 and the third valve 43 are opened, the second valve 42 is closed, and refueling is carried out through the refueling pipeline 13. When replenishing oil to the small oil storage tank located at the left end of the secondary pipeline 11, the first valve 41 and the second valve 42 are opened, the third valve 43 is closed, and replenishment is carried out through the right end of the secondary pipeline 11.

[0029] In a preferred embodiment, a first filter 51 is also provided on the secondary pipeline 11. The first filter 51 is located between the first four-way valve 21 and the secondary pump 3, and is used to filter the oil passing through the secondary pump 3 to prevent impurities from damaging the secondary pump 3.

[0030] Please see Figure 4 This oil supply system includes a main pipeline 14, a connecting pipeline 15, a main pump 6, and the aforementioned bidirectional auxiliary pump pipeline. In this application, the left end of the main pipeline 14 is described as the oil inlet, connected to a large oil storage tank, and the right end is described as the oil outlet, connected to the oil supply equipment. The main pump 6 is arranged on the main pipeline 14. One end of the connecting pipeline 15 is connected to the auxiliary pipeline 11 located between the first four-way valve 21 and the auxiliary pump 3, and the other end of the connecting pipeline 15 is connected to the main pipeline 14 located between the main pump 6 and the oil outlet of the main pipeline 14.

[0031] In some embodiments, a fourth valve 44 and an oil-gas separator 7 are also provided on the connecting pipeline 15. The fourth valve 44 is used to control the opening and closing of the connecting pipeline 15, and the oil-gas separator 7 can separate oil from air to prevent oil from being drawn out by the auxiliary pump 3.

[0032] The oil-gas separator 7 typically consists of three main parts: an exhaust valve, a housing, and a display. The outlet of the oil-gas separator 7 is connected to the inlet of the auxiliary pump 3, which in turn is connected to the system pipeline. When the auxiliary pump 3 starts operating, the oil-gas mixture in the pipeline enters the oil-gas separator 7 through its inlet. The main valve core and balance valve core of the exhaust valve open under the influence of the float's gravity, releasing the gas. When the main pump 6 draws in very little gas from the pipeline, the transported liquid also enters the oil-gas separator 7, where the gas and liquid are separated, and the gas is discharged. When the pipeline is emptied and a large amount of liquid is drawn into the oil-gas separator 7, the float rises under buoyancy, closing the exhaust valve. Simultaneously, the liquid level is displayed on the level indicator. At this point, the auxiliary pump 3 can be shut down, and the main pump 6 can be started for normal transport operations. During this process, the oil pumped by the auxiliary pump 3 can be discharged through the refueling pipeline 13 and collected in containers such as oil tanks.

[0033] In some embodiments, a fifth valve 45 and a sixth valve 46 are provided on the main pipeline 14, wherein the fifth valve 45 is located between the oil inlet end of the main pipeline 14 and the main pump 6, and the sixth valve 46 is located between the connecting pipeline 15 and the oil outlet end of the main pipeline 14. The fifth valve 45 and the sixth valve 46 are used to control the opening and closing of the oil inlet end and the oil outlet end of the main pipeline 14, respectively.

[0034] In some embodiments, a second filter 52 is also provided on the main pipeline 14, located between the fifth valve 45 and the main pump 6. The second filter 52 is used to filter the oil passing through the main pump 6 to prevent impurities from damaging the main pump 6.

[0035] In a preferred embodiment, a flow meter 8 is also installed on the main pipeline 14. The flow meter 8 is located between the connecting pipeline 15 and the sixth valve 46, and in this embodiment, the sixth valve 46 is a flow regulating valve. The operator can adjust the opening size of the sixth valve 46 according to the reading of the flow meter 8, thereby controlling the oil output flow rate of the main pipeline 14 to be within a suitable range.

[0036] In a preferred embodiment, a sampler 9 is also provided on the main pipeline 14. The sampler is located between the flow meter 8 and the sixth valve 46. The operator can first close the sixth valve 46 to reduce the flow rate of the main pipeline 14 to a range where the sampler 9 can be used, and then take a sample of the oil.

[0037] Please see Figure 5 When the main pump 6 needs to be started using the auxiliary pump 3, the first valve 41, the second valve 42, and the third valve 43 are closed, the fourth valve 44 and the fifth valve 45 are opened, and the sixth valve 46 is closed. Under the action of the auxiliary pump 3, the oil and air in the pipeline move in the direction shown by the arrows in the diagram, entering from the oil inlet of the main pipeline 14 and flowing into the auxiliary pipeline 11 through the connecting pipeline 15. After the vacuum of the main pump 6 is completed, making the main pump 6 meet the starting conditions, the fourth valve 44 is closed, the sixth valve 46 is opened, the main pump 6 is started, and the auxiliary pump 3 is closed. Under the action of the main pump 6, the oil moves in the direction shown by the arrows in the diagram, entering from the oil inlet of the main pipeline 14 and flowing into the auxiliary pipeline 11 through the connecting pipeline 15. Figure 6 The arrow shown moves along the main pipeline 14 to transport oil outwards.

[0038] Compared with the prior art, the bidirectional auxiliary pump pipeline provided by the present invention, by setting two four-way valves and a return oil pipeline, enables the auxiliary pipeline to have bidirectional oil delivery capability under the condition that the auxiliary pump can only deliver oil in one direction. Small oil tanks can be connected to the auxiliary pipeline for daily use, which expands the function of the auxiliary pump and improves the utilization rate of the auxiliary pump.

[0039] The auxiliary pump of the oil supply system provided by this invention can not only be used to start the main pump, but also has an auxiliary pipeline independent of the main pipeline, and has its own oil transportation capacity, making it more comprehensive than existing auxiliary pumps.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An oil supply system, characterized in that, It includes a main pipeline, a connecting pipeline, a main pump, and a bidirectional auxiliary pump pipeline. The main pump is arranged on the main pipeline. One end of the connecting pipeline is connected to the auxiliary pipeline located between the first four-way valve and the auxiliary pump, and the other end of the connecting pipeline is connected to the main pipeline located between the main pump and the oil outlet end of the main pipeline. The bidirectional auxiliary pump pipeline includes: a secondary pipeline, a return oil pipeline, two four-way valves, and an auxiliary pump. Along the driving direction of the auxiliary pump, a first four-way valve, the auxiliary pump, and a second four-way valve are sequentially arranged on the secondary pipeline. The A and B ports of the two four-way valves are respectively connected to the secondary pipeline. The return oil pipeline includes a first half and a second half. The two ends of the first half are respectively connected to the C ports of the two four-way valves, and the two ends of the second half are respectively connected to the D ports of the two four-way valves.

2. The oil supply system according to claim 1, characterized in that, It also includes a first valve and a second valve. Along the driving direction of the auxiliary pump, the auxiliary pipeline is sequentially arranged with the first valve, the first four-way valve, the auxiliary pump, the second four-way valve, and the second valve.

3. The oil supply system according to claim 2, characterized in that, It also includes a refueling pipeline and a third valve. One end of the refueling pipeline is connected to the auxiliary pipeline located between the auxiliary pump and the second four-way valve, and the other end is used for external fuel supply. The third valve is arranged on the refueling pipeline to control the opening and closing of the refueling pipeline.

4. The oil supply system according to claim 3, characterized in that, It also includes a first filter installed on the secondary pipeline, the first filter being located between the first four-way valve and the secondary pump.

5. The oil supply system according to claim 1, characterized in that, It also includes a fourth valve and an oil-gas separator installed on the connecting pipeline.

6. The oil supply system according to claim 1, characterized in that, It also includes a fifth valve and a sixth valve installed on the main pipeline. The fifth valve is located between the oil inlet end of the main pipeline and the main pump, and the sixth valve is located between the connecting pipeline and the oil outlet end of the main pipeline.

7. The oil supply system according to claim 6, characterized in that, It also includes a second filter installed on the main pipeline, the second filter being located between the fifth valve and the main pump.

8. The oil supply system according to claim 6, characterized in that, It also includes a flow meter installed on the main pipeline, the flow meter being located between the connecting pipeline and the sixth valve, the sixth valve being a flow regulating valve.

9. The oil supply system according to claim 8, characterized in that, It also includes a sampler installed on the main pipeline, the sampler being located between the flow meter and the sixth valve.

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