A fuel testing device for heavy oil injection system testing

Abstract

The utility model relates to diesel engine test technical field discloses a fuel test device for heavy oil injection system test, including test system, heating unit and relay oil storage unit, heating unit includes first direction control valve, first oil tank and high temperature heat pump, relay oil storage unit includes second direction control valve and second oil tank, first oil tank is connected with second oil tank of relay oil storage unit and test system through first direction control valve, second oil tank is connected with test system and first oil tank through second direction control valve, so that fuel test device can collect heavy oil in each oil circuit and workpiece to first oil tank with heating function after stopping work, avoid its condensation blockage, thereby solve the problem that fuel test device is difficult to empty heavy oil in oil circuit after test in the prior art, and further lead to the problem of oil circuit blockage.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine testing technology, and in particular to a fuel testing device for testing heavy fuel injection systems. Background Technology

[0002] Heavy oil, as a high-viscosity fuel, is widely used in large marine engines due to its low cost and high combustion efficiency. However, due to its high viscosity, its fluidity decreases significantly at low ambient temperatures, potentially causing clogging or poor atomization in the injection system, thus affecting the combustion efficiency and operational stability of the diesel engine. Therefore, the fuel temperature of heavy oil injection systems in diesel engines typically needs to be controlled between 100°C and 150°C, and fuel temperature is also a crucial factor affecting the atomization characteristics and performance of heavy oil diesel engine injection systems.

[0003] The patent application with application number CN202211179329.X describes a high-temperature fuel heating hydraulic system that uses a pneumatic three-way diverter valve to separate the high-temperature test oil circuit and the normal-temperature test oil circuit. The pneumatic three-way diverter valve is controlled by an electric proportional valve and a PLC controller, thereby realizing the rapid switching between high-temperature and normal-temperature working states of fuel. However, the system does not take into account that heavy oil may remain in the oil circuit and block the oil circuit at low temperature. Utility Model Content

[0004] The purpose of this invention is to provide a fuel testing device for testing heavy oil injection systems, which solves the problem in the prior art that it is difficult to empty the heavy oil in the fuel line after the test, thus causing the fuel line to become blocked.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: In the first aspect, this utility model provides a fuel testing device for testing heavy oil injection systems, including a testing system, a heating unit, and a relay oil storage unit; The heating unit includes a first directional control valve, a first oil storage tank, and a high-temperature heat pump. The first directional control valve includes an oil inlet and two oil outlets. The first oil inlet is connected to the oil outlet of the first oil storage tank, and the first oil outlet is connected to the first return oil outlet of the first oil storage tank. The oil storage chamber of the first oil storage tank is connected to the heating end of the high-temperature heat pump, and the second return oil outlet of the first oil storage tank is connected to the return oil outlet of the test system used for heavy oil testing. The relay oil storage unit includes a second directional control valve and a second oil storage tank. The second directional control valve includes an oil inlet and two oil outlets. The second oil inlet is connected to the oil outlet of the second oil storage tank. The third oil outlet is connected to the oil inlet of the test system used for heavy oil testing. The fourth oil outlet is connected to the second return oil outlet of the first oil storage tank. The oil inlet of the second oil storage tank is connected to the second oil outlet. In a preset state, the first oil inlet is connected only to the first oil outlet or the second oil outlet, and in a preset state, the second oil inlet is connected only to the third oil outlet or the fourth oil outlet.

[0006] As an optional solution, both the first directional control valve and the second directional control valve are two-position three-way solenoid valves, and the control circuits of the first directional control valve and the second directional control valve are independent of each other; When powered on, the first oil inlet is connected to the first oil outlet, and the second oil inlet is connected to the fourth oil outlet. In the power-off state, the first oil inlet is connected to the second oil inlet of the first directional control valve, and the second oil inlet is connected to the third oil outlet.

[0007] As an optional solution, the oil passage connecting the first oil inlet and the oil outlet of the first oil tank is the first connecting oil passage, and the oil passage connecting the second oil inlet and the oil outlet of the second oil tank is the second connecting oil passage. Both the first connecting oil circuit and the second connecting oil circuit are equipped with a booster assembly, which includes a servo fuel pump, a one-way valve and a filter; The servo fuel pump, check valve and filter on the first connecting oil line are arranged sequentially along the oil flow direction of the first connecting oil line, and the oil inlet of the check valve on the first connecting oil line is located on the side of the oil outlet of the first oil tank. The servo fuel pump, check valve and filter on the second connecting oil line are arranged sequentially along the oil flow direction of the second connecting oil line, and the oil inlet of the check valve on the second connecting oil line is located on the side of the oil outlet of the second oil tank.

[0008] As an optional solution, the first and second oil storage tanks are also equipped with functional components, including an insulation layer, an air filter, a thermometer, and a level gauge.

[0009] This utility model has the following unexpected beneficial effects: 1. This utility model sets up a heating unit and a relay oil storage unit before the test system used for heavy oil testing. The heavy oil is heated by the first oil storage tank and a high-temperature heat pump, and then transported to the test system after passing through the second oil storage tank. The first directional control valve and the second directional control valve can switch the direction of heavy oil transportation, so that after the test system stops working, the heavy oil remaining in the second oil storage tank and the oil circuit can flow back to the first oil storage tank with heating function. This solves the problem in the prior art that it is difficult to drain the heavy oil in the oil circuit after the test is completed, which leads to oil circuit blockage.

[0010] 2. The present invention utilizes a high-temperature heat pump to heat heavy oil in the oil storage chamber within the first oil storage tank, resulting in a more uniform heating process and more controllable temperature rise. This avoids safety issues such as boiling, splashing, and evaporation caused by uneven heating in traditional heating methods. Attached Figure Description

[0011] Figure 1 This is an overall schematic diagram of the fuel testing device for testing heavy oil injection systems according to an embodiment of this utility model; In the diagram, 1. Test system; 2. First fuel tank; 3. First directional control valve; 301. First fuel inlet; 302. First fuel outlet; 303. Second fuel outlet; 4. High-temperature heat pump; 5. Second fuel tank; 6. Second directional control valve; 601. Second fuel inlet; 602. Third fuel outlet; 604. Fourth fuel outlet; 7. Servo fuel pump; 8. Check valve; 9. Filter; 10. Insulation layer; 11. Air filter; 12. Thermometer; 13. Level gauge. Detailed Implementation

[0012] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0013] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0014] In the description of this utility model, it should be understood that the terms "connected," "linked," and "fixed," etc., used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or a welded connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0015] In one embodiment, such as Figure 1 As shown, in a first aspect, this utility model provides a fuel testing device for testing heavy oil injection systems, including a testing system 1, a heating unit, and a relay oil storage unit.

[0016] The heating unit includes a first directional control valve 3, a first oil storage tank 2, and a high-temperature heat pump 4. The first directional control valve 3 includes a first oil inlet 301, a first oil outlet 302, and a second oil outlet 303. The first oil inlet 301 is connected to the oil outlet of the first oil storage tank 2, the first oil outlet 302 is connected to the first return oil outlet of the first oil storage tank 2, the oil storage chamber of the first oil storage tank 2 is connected to the heating end of the high-temperature heat pump 4, and the second return oil outlet of the first oil storage tank 2 is connected to the return oil outlet of the test system 1 used for heavy oil testing.

[0017] The heating end of the high-temperature heat pump 4 used here extends directly into the oil storage chamber of the first oil storage tank 2 for direct heating. Its working method is to absorb heat from the environment and transfer it to the fuel to achieve the heating effect. This makes the heating method of this utility model more efficient and less energy-consuming than traditional electric heating.

[0018] The relay oil storage unit includes a second directional control valve 6 and a second oil storage tank 5. The second directional control valve 6 includes a second oil inlet 601, a third oil outlet 602, and a fourth oil outlet 604. The second oil inlet 601 is connected to the oil outlet of the second oil storage tank 5. The third oil outlet 602 is connected to the oil inlet of the test system 1 used for heavy oil testing. The fourth oil outlet 604 is connected to the second return oil outlet of the first oil storage tank 2. The oil inlet of the second oil storage tank 5 is connected to the second oil outlet 303.

[0019] In a preset state, the first oil inlet 301 is only connected to the first oil outlet 302 or the second oil outlet 303, and in a preset state, the second oil inlet 601 is only connected to the third oil outlet 602 or the fourth oil outlet 604.

[0020] After the heavy oil in the first oil tank 2 is heated, it flows into the second oil tank 5 through the oil outlet of the first oil tank 2 and the first directional control valve 3. At this time, due to the physical characteristics of heavy oil, not all heavy oil is at the test temperature. After the heavy oil flows into the second oil tank 5, the liquid undergoes heat conduction after standing still, so that the heavy oil in the second oil tank 5 is at the same temperature before being introduced into the test system 1 for testing.

[0021] When the first oil tank 2 malfunctions, the second oil tank 5 still contains heavy oil, which can temporarily maintain the supply of heavy oil to the test system 1, thereby ensuring the stability of the test within the test system 1.

[0022] Based on this, the fuel testing device uses the first oil storage tank 2 as the heating area for heavy oil. After heating is completed, the heavy oil flows into the second oil storage tank 5 through the second oil outlet 303, and then into the testing system 1 through the third oil outlet 602. When it is necessary to stop the entire fuel testing device, the high-temperature heat pump 4 stops working, the first oil inlet 301 is switched to be connected to the first oil outlet 302, and the second oil inlet 601 is switched to be connected to the fourth oil outlet 604. At this time, the heavy oil flowing out of the first oil storage tank 2 through the first oil outlet 302... 2. The heavy oil in the second oil tank 5 flows back into the first oil tank 2 through the fourth oil outlet 604. The heavy oil remaining in the test system 1 flows into the first oil tank 2 through the second oil return port of the first oil tank 2. This allows the fuel test device to collect the heavy oil in each oil circuit and workpiece into the first oil tank 2 with heating function after it stops working, thus preventing it from condensing and clogging. This solves the problem in the prior art that the fuel test device is difficult to empty the heavy oil in the oil circuit after the test, which leads to oil circuit blockage.

[0023] Furthermore, such as Figure 1 As shown, both the first directional control valve 3 and the second directional control valve 6 are two-position three-way solenoid valves, and the control circuits of the first directional control valve 3 and the second directional control valve 6 are independent of each other.

[0024] When powered on, the first oil inlet 301 is connected to the first oil outlet 302, and the second oil inlet 601 is connected to the fourth oil outlet 604.

[0025] In the power-off state, the first oil inlet 301 is connected to the second oil inlet 601 of the first directional control valve 3, and the second oil inlet 601 is connected to the third oil outlet 602.

[0026] The energizing and de-energizing timings of the first directional control valve 3 and the second directional control valve 6 can be switched independently. When the temperature of the heavy oil in the second oil tank 5 is too low, the second directional control valve 6 can switch its state first to allow the heavy oil in the second oil tank 5 to return to the first oil tank 2 for reheating, thereby maintaining the temperature accuracy of the heavy oil injection system test.

[0027] Furthermore, this embodiment is not shown in the accompanying drawings. The first directional control valve 3 and the second directional control valve 6 can also be manually switched by on-site personnel. The cost of manually switching the first directional control valve 3 and the second directional control valve 6 is lower than that of using a two-position three-way solenoid valve, but the timing accuracy of switching the valves cannot be compared with that of a two-position three-way solenoid valve.

[0028] Furthermore, such as Figure 1 As shown, the oil passage connecting the first oil inlet 301 and the oil outlet of the first oil tank 2 is the first connecting oil passage, and the oil passage connecting the second oil inlet 601 and the oil outlet of the second oil tank 5 is the second connecting oil passage.

[0029] Both the first connecting oil circuit and the second connecting oil circuit are equipped with a booster assembly, which includes a servo fuel pump 7, a one-way valve 8, and a filter 9.

[0030] The servo fuel pump 7, the one-way valve 8, and the filter 9 on the first connecting oil line are arranged sequentially along the oil flow direction of the first connecting oil line, and the oil inlet of the one-way valve 8 on the first connecting oil line is located on the side of the oil outlet of the first oil tank 2.

[0031] The servo fuel pump 7, the one-way valve 8, and the filter 9 on the second connecting oil line are arranged sequentially along the oil flow direction of the second connecting oil line, and the oil inlet of the one-way valve 8 on the second connecting oil line is located on the side of the oil outlet of the second oil tank 5.

[0032] The servo fuel pump 7 is used to pump the heavy oil flow in the oil circuit, the check valve 8 is used to prevent backflow in the oil circuit, and the filter 9 is used to filter the heavy oil in the oil circuit to prevent contaminants from damaging the components.

[0033] Furthermore, such as Figure 1 As shown, the first oil tank 2 and the second oil tank 5 are also equipped with functional components, including a thermal insulation layer 10, an air filter 119, a thermometer 12, and a level gauge 13.

[0034] The insulation layer 10 is used to reduce the rate of heat loss from the first oil tank 2 or the second oil tank 5. The air filter 119 is used to prevent pollutants in the air from entering the oil circuit and causing damage to the components. The thermometer 12 is used to detect the temperature of the heavy oil in the oil tank. The level gauge 13 is used to detect the amount of heavy oil remaining in the oil tank.

[0035] In summary, the test device includes a test system 1, a heating unit, and a relay oil storage unit. The heating unit's first oil storage tank 2 has a heating end of a high-temperature heat pump 4 inside its storage chamber to heat the heavy oil within. The first oil storage tank 2 is connected to the second oil storage tank 5 of the relay oil storage unit and the test system 1 via a first directional control valve 3. The second oil storage tank 5 is connected to the test system 1 and the first oil storage tank 2 via a second directional control valve 6. This allows the fuel testing device to collect the heavy oil from each oil circuit and workpiece into the heated first oil storage tank 2 after it stops working, preventing condensation and blockage. This solves the problem in the prior art where fuel testing devices struggle to empty the heavy oil from the oil circuits after testing, leading to blockages.

[0036] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A fuel testing apparatus for testing heavy fuel injection systems, characterized in that, Includes a test system (1), a heating unit, and a relay oil storage unit; The heating unit includes a first directional control valve (3), a first oil storage tank (2), and a high-temperature heat pump (4). The first directional control valve (3) includes a first oil inlet (301), a first oil outlet (302), and a second oil outlet (303). The first oil inlet (301) is connected to the oil outlet of the first oil storage tank (2), and the first oil outlet (302) is connected to the first return oil outlet of the first oil storage tank (2). The oil storage chamber of the first oil storage tank (2) is connected to the heating end of the high-temperature heat pump (4), and the second return oil outlet of the first oil storage tank (2) is connected to the return oil outlet of the test system (1) used for heavy oil testing. The relay oil storage unit includes a second directional control valve (6) and a second oil storage tank (5). The second directional control valve (6) includes a second oil inlet (601), a third oil outlet (602) and a fourth oil outlet (603). The second oil inlet (601) is connected to the oil outlet of the second oil storage tank (5). The third oil outlet (602) is connected to the oil inlet of the test system (1) used for heavy oil testing. The fourth oil outlet (603) is connected to the second return oil outlet of the first oil storage tank (2). The oil inlet of the second oil storage tank (5) is connected to the second oil outlet (303). The first oil inlet (301) is connected only to the first oil outlet (302) or the second oil outlet (303) in the preset state, and the second oil inlet (601) is connected only to the third oil outlet (602) or the fourth oil outlet (603) in the preset state.

2. The experimental apparatus according to claim 1, characterized in that, The first directional control valve (3) and the second directional control valve (6) are both two-position three-way solenoid valves, and the control circuits of the first directional control valve (3) and the second directional control valve (6) are independent of each other; When powered on, the first oil inlet (301) is connected to the first oil outlet (302), and the second oil inlet (601) is connected to the fourth oil outlet (603); In the power-off state, the first oil inlet (301) is connected to the second oil inlet (601) of the first directional control valve (3), and the second oil inlet (601) is connected to the third oil outlet (602).

3. The experimental apparatus according to claim 1, characterized in that, The oil passage connecting the first oil inlet (301) and the oil outlet of the first oil tank (2) is the first connecting oil passage, and the oil passage connecting the second oil inlet (601) and the oil outlet of the second oil tank (5) is the second connecting oil passage. Both the first connecting oil circuit and the second connecting oil circuit are equipped with a booster assembly, which includes a servo fuel pump (7), a one-way valve (8), and a filter (9). The servo fuel pump (7), check valve (8) and filter (9) on the first connecting oil line are arranged sequentially along the oil flow direction of the first connecting oil line, and the oil inlet of the check valve (8) on the first connecting oil line is located on the side of the oil outlet of the first oil tank (2). The servo fuel pump (7), check valve (8) and filter (9) on the second connecting oil line are arranged sequentially along the oil flow direction of the second connecting oil line, and the oil inlet of the check valve (8) on the second connecting oil line is located on the side of the oil outlet of the second oil tank (5).

4. The experimental apparatus according to claim 1, characterized in that, The first oil tank (2) and the second oil tank (5) are also equipped with functional components, including a heat insulation layer (10), an air filter (11), a thermometer (12), and a level gauge (13).

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