Bidirectional refueling system

Abstract

This utility model discloses a two-way refueling system installed on a liquid transport vehicle. It includes a pneumatic diaphragm pump, a first two-position three-way valve, and a second two-position three-way valve. The outlet of the pneumatic diaphragm pump is connected to port A of the first two-position three-way valve via a first pipeline. Port B of the first two-position three-way valve is connected to the inlet of the pneumatic diaphragm pump, and port P of the first two-position three-way valve is connected to the oil tank of the liquid transport vehicle. A second pipeline is connected to the first pipeline, connecting to port A of the second two-position three-way valve. Port B of the second two-position three-way valve is connected to the inlet of the pneumatic diaphragm pump, and port P of the second two-position three-way valve is used for selective connection to the refueling port of an oil drum or an explosion-proof diesel engine. The pneumatic diaphragm pump is connected to an air source. This system reduces the need for repeated plugging and unplugging of the oil tank interface in traditional refueling methods, prevents external dust, moisture, and other impurities from entering the oil, and solves the problem of oil contamination during traditional manual pouring or transfer processes.

Description

Technical Field

[0001] This utility model belongs to the field of refueling technology, specifically a two-way refueling system. Background Technology

[0002] In the field of underground coal mine transportation equipment, explosion-proof diesel engines are widely used as the power source for equipment such as monorail cranes and rack railcars due to their stable power performance and adaptability to complex working conditions. To ensure the continuous operation of explosion-proof diesel engines, they need to be refueled with diesel fuel regularly underground.

[0003] In existing technologies, downhole refueling typically relies on pneumatic diaphragm pumps: first, the pneumatic diaphragm pump draws diesel fuel from the drum into the tank of a liquid transport vehicle, and then another pneumatic diaphragm pump transfers the diesel fuel from the tank to the fuel tank of an explosion-proof diesel engine. This process requires the liquid transport vehicle as a transfer vehicle to complete two transfers: from the drum to the diesel engine fuel tank.

[0004] However, in the above refueling method, the diesel fuel tank interface needs to be plugged and unplugged multiple times during the transfer process, which makes it easy for external dust, moisture and other impurities to enter the fuel, affecting the purity of the diesel fuel, thereby aggravating the wear of the diesel engine and shortening the service life of the equipment. In addition, the two transfer processes involve multiple pipeline connection and disassembly operations, which prolongs the time of a single refueling and reduces the effective operating time of the downhole transportation equipment. Utility Model Content

[0005] The purpose of this invention is to address the above-mentioned problems by providing a two-way refueling system for liquid transport vehicles, thereby solving the problem of increased oil pollution caused by multiple transfers of diesel fuel underground in coal mines.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a two-way refueling system, installed on a mining liquid transport vehicle, including a pneumatic diaphragm pump, a first two-position three-way valve, and a second two-position three-way valve. The oil outlet of the pneumatic diaphragm pump is connected to the A port of the first two-position three-way valve through a first pipeline. The B port of the first two-position three-way valve is connected to the oil inlet of the pneumatic diaphragm pump. The P port of the first two-position three-way valve is connected to the oil tank of the liquid transport vehicle.

[0007] A second pipeline is connected to the first pipeline via a pipe joint. The second pipeline is connected to port A of the second two-position three-way valve. Port B of the second two-position three-way valve is connected to the oil inlet of the pneumatic diaphragm pump. Port P of the second two-position three-way valve is used for selective connection to the oil tank or the refueling port of the explosion-proof diesel engine. The pneumatic diaphragm pump is connected to an air source.

[0008] In one possible embodiment, a diesel filter and a flow meter are provided on the first pipeline.

[0009] In one possible embodiment, a pressure reducing valve and an air filter are provided on the third pipeline connecting the pneumatic diaphragm pump to the air source.

[0010] In one possible embodiment, the P port of the second two-position three-way valve is selectively connected to the oil tank or the refueling port of the explosion-proof diesel engine via a quick-connect fitting.

[0011] The beneficial effects of this invention are as follows: By switching between the first two-position three-way valve and the second two-position three-way valve, bidirectional transportation of oil from the drum to the tank and from the tank to the explosion-proof diesel engine is achieved. This reduces the need for multiple plugging and unplugging of the tank interface in traditional refueling methods, prevents external dust, moisture, and other impurities from entering the oil, and solves the problem of oil contamination during traditional manual pouring or transfer. Since there is no need to switch refueling methods multiple times, work efficiency is improved. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the hydraulic system of this utility model.

[0013] In the diagram: 1. Air filter; 2. Pressure reducing valve; 3. Pneumatic diaphragm pump; 4. Diesel filter; 5. Flow meter; 6. First two-position three-way valve; 7. Second two-position three-way valve. Detailed Implementation

[0014] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0015] refer to Figure 1 This embodiment provides a two-way refueling system for a liquid transport vehicle, including a pneumatic diaphragm pump 3, a first two-position three-way valve 6, and a second two-position three-way valve 7.

[0016] Among them, the pneumatic diaphragm pump 3 is driven by an air source and includes an oil inlet and an oil outlet. The oil outlet is connected to a first pipeline, which is connected to port A of the first two-position three-way valve 6. Port B is connected to the oil inlet of the pneumatic diaphragm pump 3, and port P is fixedly connected to the oil tank of the underground liquid transport vehicle in the coal mine.

[0017] In some embodiments, a second pipeline is connected to the first pipeline via a pipe fitting. The second pipeline is connected to port A of the second two-position three-way valve 7, port B is connected to the oil inlet of the pneumatic diaphragm pump 3, and port P is connected to an oil drum or an explosion-proof diesel engine.

[0018] In some possible implementations, the B ports of the first two-position three-way valve 6 and the second two-position three-way valve 7 merge and are connected to the oil inlet of the pneumatic diaphragm pump 3 through the same pipeline.

[0019] The oil drum is an independent diesel fuel container, which is set up in a fixed area above or below the coal mine. The two-way refueling system of the liquid transport vehicle is connected to the oil tank and moves with the liquid transport vehicle. When it is necessary to extract diesel fuel from the oil drum to the oil tank, the liquid transport vehicle is moved to the oil drum, the pipeline connected to the P port of the second two-position three-way valve 7 is extended into the oil drum, the second two-position three-way valve is switched to connect the P port and the B port, the first two-position three-way valve is switched to connect the P port and the A port, and the pneumatic diaphragm pump 3 is turned on. The pneumatic diaphragm pump 3 draws in diesel fuel and flows into the oil tank through the first pipeline.

[0020] When it is necessary to add diesel fuel from the tank to the explosion-proof diesel engine, move the liquid transport vehicle to the explosion-proof diesel engine, extend the pipeline connected to the P port of the second two-position three-way valve 7 into the refueling port of the explosion-proof diesel engine, switch the second two-position three-way valve to connect the P port and the A port, switch the first two-position three-way valve to connect the P port and the B port, turn on the pneumatic diaphragm pump 3, and the diesel fuel in the tank is drawn in through the oil inlet of the pneumatic diaphragm pump 3 and flows through the first pipeline and the second pipeline from the second two-position three-way valve 7 to the explosion-proof diesel engine to complete the refueling.

[0021] In some embodiments, a diesel filter 4 and a flow meter 5 are provided on the first pipeline.

[0022] In some possible implementations, the air source is connected to the pneumatic diaphragm pump 3 via a third pipeline, on which an air filter 1 and a pressure reducing valve 2 are installed.

[0023] In some embodiments, the P port of the second two-position three-way valve 7 is selectively connected to the oil tank or the refueling port of the explosion-proof diesel engine via a quick-connect fitting.

[0024] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A bi-directional refueling system, disposed on a liquid transport vehicle, characterized in that, It includes a pneumatic diaphragm pump, a first two-position three-way valve, and a second two-position three-way valve. The oil outlet of the pneumatic diaphragm pump is connected to port A of the first two-position three-way valve through a first pipeline. Port B of the first two-position three-way valve is connected to the oil inlet of the pneumatic diaphragm pump. Port P of the first two-position three-way valve is connected to the oil tank of the liquid transport vehicle. A second pipeline is connected to the first pipeline. The second pipeline is connected to port A of the second two-position three-way valve. Port B of the second two-position three-way valve is connected to the oil inlet of the pneumatic diaphragm pump. Port P of the second two-position three-way valve is used to connect to the oil tank or the filling port of the explosion-proof diesel engine. The pneumatic diaphragm pump is connected to an air source.

2. The bidirectional refueling system according to claim 1, characterized in that, A diesel filter and a flow meter are installed on the first pipeline.

3. The bidirectional refueling system of claim 1, wherein, A pressure reducing valve and an air filter are installed on the third pipeline connecting the pneumatic diaphragm pump to the air source.

4. The bidirectional refueling system of claim 1, wherein, The P port of the second two-position three-way valve is connected to the oil tank or the filling port of the explosion-proof diesel engine via a quick-connect fitting.

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