Simple test bed for low-pressure methanol ejector

Abstract

The utility model provides a simple test bed for a low-pressure methanol ejector. The simple test bed comprises a methanol box, a methanol pump, a surge tank, a first switch valve, the methanol ejector, a sealing plate and a transparent observation box, methanol is stored in the methanol box; the methanol pump is connected to the methanol box through a pipeline, and the methanol pump is also connected to the surge tank through a pipeline; the methanol pump is used for pumping methanol from the methanol box and feeding the methanol into the pressure stabilizing tank; the pressure stabilizing tank is connected to the methanol injector through a pipeline, the first switch valve is arranged on the pipeline connecting the pressure stabilizing tank and the methanol injector, the methanol injector is fixedly installed on the sealing plate, the sealing plate covers the transparent observation box, and the methanol injector injects methanol in the transparent observation box after being opened. The device is simple in structure, easy to build and comprehensive in function, and can be used for performance test, flow measurement, durability test and the like of the methanol ejector.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel injection systems of marine pure methanol engines and methanol / diesel dual-fuel engines, in particular to a simple low-pressure methanol injector test bench. Background Art

[0002] The energy transformation of the shipping industry under the goal of the "dual carbon strategy" is urgent, and the application market of new energy fuel power system technologies such as methanol is in urgent need. Dual-fuel engines that inject methanol into the intake duct, ignite pure methanol engines with spark plugs, or ignite diesel have become one of the key research technology routes in the internal combustion engine industry.

[0003] Methanol is a low-carbon, renewable new energy fuel with the characteristics of efficient combustion and clean emissions. Compared with traditional diesel and other new energy fuels with large price fluctuations, methanol is stable, low-cost and economical to use. In addition, my country also has a stable alcohol source supply capacity, which is also the key to the vigorous promotion and rapid market application of methanol ships and their engines.

[0004] At present, the technical route of injecting methanol into the intake port can be directly modified on the original diesel engine. The characteristics of this solution are short modification cycle, low cost, and excellent adaptability, which meets the current strategic requirements of the shipping industry for low-carbon emissions. As one of the key actuators of the marine engine fuel injection system, the methanol injector is used to supply methanol fuel to the engine cylinder in a timely, qualitative, and quantitative manner for full combustion, thereby completing a steady stream of power output, thereby helping the country achieve the strategic goals of "carbon peak and carbon neutrality" and promoting low-carbon and zero-carbonization in the shipping field.

[0005] The injection performance, flow rate and service life of the methanol injector need to be tested before leaving the factory. Conventional test benches are often costly, complicated to operate and have long fault repair cycles. Therefore, developing and designing a test bench that is comprehensive in functions, simple to operate, convenient to maintain, cheap and practical is crucial both for the market application of methanol fuel engines and for the smooth realization of the emission reduction targets of the entire shipping industry. Utility Model Content

[0006] The utility model aims to provide a simple low-pressure methanol injector test bench, which has the characteristics of comprehensive functions, simple operation, convenient maintenance, low cost and practicality.

[0007] The utility model is realized through the following technical solutions:

[0008] The utility model discloses a simple low-pressure methanol injector test bench, comprising a methanol tank, a methanol pump, a pressure-stabilizing tank, a first switch valve, a methanol injector, a sealing plate and a transparent observation box;

[0009] The methanol tank stores methanol; the methanol pump is connected to the methanol tank through a pipeline, and the methanol pump is also connected to a pressure stabilizing tank through a pipeline; the methanol pump pumps methanol out of the methanol tank and sends it into the pressure stabilizing tank;

[0010] The pressure stabilizing tank is connected to the methanol injector through a pipeline, the first switch valve is arranged on the pipeline connecting the pressure stabilizing tank and the methanol injector, the methanol injector is fixedly installed on a sealing plate, the sealing plate covers the transparent observation box, and after the methanol injector is opened, methanol is injected into the transparent observation box; the injection effect of the methanol injector is observed through the transparent observation box.

[0011] Optionally, it further includes a measuring cup, a second switch valve and a third switch valve;

[0012] The measuring cup is connected to the transparent observation box through a pipeline, and the second switch valve is arranged on the pipeline connecting the measuring cup and the transparent observation box;

[0013] The measuring cup is connected to the methanol tank through a pipeline, and the third switch valve is arranged on the pipeline connecting the measuring cup and the methanol tank. The recycling of methanol can be realized.

[0014] Optionally, a first one-way valve and a safety valve are installed on the pipeline connecting the methanol pump and the pressure stabilizing tank, and the safety valve is also connected to the methanol tank through a pipeline. It can ensure the one-way flow of methanol to the pressure stabilizing tank; when the pressure at the outlet end of the methanol pump or in the pressure stabilizing tank exceeds the preset safety pressure value, the safety valve automatically opens and releases the methanol back to the methanol tank to achieve rapid pressure relief, thus ensuring the safety of the test.

[0015] Optionally, a pressure regulating valve and a pressure gauge are installed at the upper end of the pressure stabilizing tank, and the pressure regulating valve is connected to the methanol tank through a pipeline. By observing the pressure gauge and manually adjusting the opening degree of the pressure regulating valve to control the methanol return flow, the pressure in the pressure stabilizing tank can be accurately regulated.

[0016] Optionally, the sealing plate and the transparent observation box are sealed. Ensure that methanol does not leak or volatilize to the outside.

[0017] Optionally, a second one-way valve is also arranged on the pipeline connecting the pressure stabilizing tank and the methanol injector. Ensure the one-way flow of methanol to the methanol injector.

[0018] Optionally, it further includes an electronic scale, and the measuring cup is placed on the electronic scale. The measuring cup is placed on the electronic scale, and by measuring the change in the mass of the measuring cup after taring, the flow rate of the methanol injector can be accurately calculated.

[0019] Optionally, exhaust fans are installed above and obliquely below the low-pressure methanol injector test bench, and a methanol concentration detector is installed near the exhaust fan obliquely below. The setting of the exhaust fan can improve air circulation and reduce the concentration of methanol; the methanol concentration detector is used to monitor the ambient methanol concentration in real time to ensure safety.

[0020] The advantages of the present utility model are as follows:

[0021] (1) Modular design, easy to assemble and maintain:

[0022] The test bench is composed of multiple independent modules (such as methanol pumps, pressure stabilizing tanks, switching valves, methanol injectors, etc.). The modules are connected by pipelines, making the whole system easy to assemble and disassemble, and convenient for maintenance and replacement of components.

[0023] (2) Stable and adjustable pressure:

[0024] The design of the pressure stabilizing tank ensures the stability of the methanol supply pressure. At the same time, the configuration of the pressure regulating valve and the pressure gauge enables the test personnel to manually adjust the pressure to meet the requirements under different test conditions.

[0025] (3) High safety performance:

[0026] A safety valve is installed in the system. When the pressure exceeds the set value, the safety valve will automatically open and release the methanol back to the methanol tank, effectively preventing the occurrence of overpressure accidents.

[0027] The sealing design between the sealing plate and the transparent observation box, as well as the installation of the one-way valve, ensure that methanol will not leak to the outside during the test, further improving the safety of the test.

[0028] (4) Convenient and intuitive observation:

[0029] The design of the transparent observation box enables the test personnel to directly observe the injection effect of the methanol injector without opening the box body, improving the convenience and accuracy of the test.

[0030] (5) Methanol recycling:

[0031] By setting components such as measuring cups and switching valves, the recycling of methanol is realized. The methanol ejected by the methanol injector can be collected in the measuring cup and returned to the methanol tank through pipelines, reducing the waste of methanol and lowering the test cost.

[0032] (6) Precise measurement:

[0033] The measuring cup is placed on a high-precision electronic scale, which can accurately measure the mass of the collected methanol, so as to calculate parameters such as the flow rate of the methanol injector, improving the accuracy of the test data.

[0034] (7) Environmentally friendly:

[0035] Exhaust fans are installed above and obliquely below the test bench, which helps to improve the test environment and reduce the methanol concentration. At the same time, the methanol concentration detector near the exhaust fan obliquely below can monitor the environmental methanol concentration in real time to ensure that the impact of the test process on the environment is minimized.

[0036] (8)Strong adaptability:

[0037] The test bench has a simple structure and complete functions, can adapt to the test requirements of methanol injectors of different models and specifications, and has strong versatility and adaptability.

[0038] (9)Comprehensive functions:

[0039] This test bench can be used for performance testing, flow measurement, durability test, etc. of methanol injectors.

[0040] In summary, the simple low-pressure methanol injector test bench fully considers multiple aspects such as safety, convenience, accuracy, environmental friendliness, simple operation, comprehensive functions, convenient maintenance, and low cost and practicality in design, and has high practical value and promotion prospects. Description of the Drawings

[0041] Figure 1 is a schematic structural diagram of the present utility model;

[0042] Figure 2 is a schematic diagram of the sealing plate in the present utility model;

[0043] In the figure: 1 - methanol pump, 2 - first check valve, 3 - safety valve, 4 - pressure stabilizing tank, 5 - pressure regulating valve, 6 - pressure gauge, 7 - second check valve, 8 - exhaust fan, 9 - first switching valve, 10 - methanol injector, 11 - sealing plate, 12 - transparent observation box, 13 - second switching valve, 14 - measuring cup, 15 - electronic scale, 16 - third switching valve, 17 - methanol concentration detector, 18 - methanol tank. Detailed Embodiments

[0044] The following will describe the embodiments of the present utility model with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be understood that the preferred embodiments are only for explaining the present utility model and not for limiting the protection scope of the present utility model.

[0045] It should be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present utility model. The illustrations only show the components related to the present utility model, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0046] As Figure 1 shown, in the embodiment of the present application, a simple low-pressure methanol injector test bench includes a methanol tank 18, a methanol pump 1, a pressure stabilizing tank 4, a first switch valve 9, a methanol injector 10, a sealing plate 11, and a transparent observation box 12. Methanol is stored in the methanol tank 18; the methanol pump 1 is connected to the methanol tank 18 through a pipeline, and the methanol pump 1 is also connected to the pressure stabilizing tank 4 through a pipeline. The methanol pump 1 is used to pump methanol out of the methanol tank 18 and send it into the pressure stabilizing tank 4. The pressure stabilizing tank 4 is connected to the methanol injector 10 through a pipeline, and the first switch valve 9 is arranged on the pipeline connecting the pressure stabilizing tank 4 and the methanol injector 10. The methanol injector 10 is installed and fixed on the sealing plate 11, and the sealing plate 11 covers the transparent observation box 12. After the methanol injector 10 is opened, methanol is injected into the transparent observation box 12, and the injection effect of the methanol injector 10 is observed through the transparent observation box 12.

[0047] As Figure 1 shown, in the embodiment of the present application, the design of the transparent observation box 12 allows the test personnel to directly observe the injection state of the methanol injector 10 without opening the box body, improving the convenience and accuracy of the test.

[0048] As Figure 1 shown, in a possible embodiment, a simple low-pressure methanol injector test bench further includes a measuring cup 14, a second switch valve 13, and a third switch valve 16. The measuring cup 14 is connected to the transparent observation box 12 through a pipeline, and the second switch valve 13 is arranged on the pipeline connecting the measuring cup 14 and the transparent observation box 12. The measuring cup 14 is connected to the methanol tank 18 through a pipeline, and the third switch valve 16 is arranged on the pipeline connecting the measuring cup 14 and the methanol tank 18. The measuring cup 14 is connected to the transparent observation box 12 and the methanol tank 18 through pipelines, the second switch valve 13, and the third switch valve 16, enabling the recycling of methanol.

[0049] As Figure 1 shown, in a possible embodiment, a first one-way valve 2 and a safety valve 3 are installed on the pipeline connecting the methanol pump 1 and the pressure stabilizing tank 4, and the safety valve 3 is also connected to the methanol tank 18 through a pipeline. The setting of the first one-way valve 2 can ensure the one-way flow of methanol to the pressure stabilizing tank 4; when the pressure at the outlet end of the methanol pump 1 or in the pressure stabilizing tank 4 exceeds the preset safety pressure value, the safety valve 3 automatically opens to release methanol back into the methanol tank 18 to achieve rapid pressure relief, thereby ensuring the safety of the test.

[0050] As Figure 1 shown, in a possible embodiment, a pressure regulating valve 5 and a pressure gauge 6 are installed at the upper end of the pressure stabilizing tank 4. The pressure regulating valve 5 is connected to the methanol tank 18 through a pipeline. By observing the pressure gauge 6 and manually adjusting the opening degree of the pressure regulating valve 5, the methanol return flow rate can be controlled, so as to realize the precise regulation of the pressure in the pressure stabilizing tank 4.

[0051] As Figure 1 shown, in a possible embodiment, a sealed connection is provided between the sealing plate 11 and the transparent observation box 12. Through the sealed connection, it can be ensured that methanol does not leak or volatilize to the outside.

[0052] As Figure 2 shown, the sealing plate 11 is also designed with a fixed installation hole position for the methanol injector 10, making the disassembly and assembly of the methanol injector 10 more convenient.

[0053] As Figure 1 shown, in a possible embodiment, a second one-way valve 7 is also provided on the pipeline connecting the pressure stabilizing tank 4 and the methanol injector 10; to ensure that methanol flows unidirectionally to the methanol injector 10.

[0054] As Figure 1 shown, in a possible embodiment, a simple low-pressure methanol injector test bench further includes an electronic scale 15, and a measuring cup 14 is placed on the electronic scale 15. When the second switch valve 13 and the third switch valve 16 are closed, by measuring the mass change of the measuring cup 14 after taring, the flow rate of the methanol injector 10 can be accurately calculated.

[0055] As Figure 1 shown, in a possible embodiment, exhaust fans 8 are installed both above and obliquely below the low-pressure methanol injector test bench, and a methanol concentration detector 17 is installed near the exhaust fan 8 obliquely below. The setting of the exhaust fan 8 can improve air circulation and reduce the methanol concentration; the methanol concentration detector 17 is used to monitor the ambient methanol concentration in real time to ensure safety.

[0056] In the embodiments of the present application, the conventional functions and usage of the simple low-pressure methanol injector test bench are as follows:

[0057] 1. Performance test and flow rate measurement of the methanol injector:

[0058] First, install and fix the methanol injector 10 on the sealing plate 11 designed with mounting holes. The methanol injector 10 is connected to the controller, and the controller is used to control the operation of the methanol injector 10. Detect whether the methanol liquid level in the methanol tank 18 meets the test requirements, check whether the connections between various parts are normal, and detect whether the safety valve 3 and the pressure gauge 6 are normal. Keep the pressure regulating valve 5 in a fully open state. After the above steps are completed, turn on the methanol pump 1. Under the action of the methanol pump 1, methanol is injected from the methanol tank 18 into the pressure stabilizing tank 4 through the first one-way valve 2 and the safety valve 3. At this time, since the pressure regulating valve 5 is in a fully open state, methanol can flow back to the methanol tank 18 through the pipeline connecting the pressure regulating valve 5 and the methanol tank 18, and the pressure at the inlet end of the methanol injector 10 is about 0. After a period of time (about 30 s), manually adjust the opening degree of the pressure regulating valve 5 to make the pressure at the inlet ends of the pressure stabilizing tank 4 and the methanol injector 10 start to rise. Read the data of the pressure gauge 6, and continue to adjust the opening degree of the pressure regulating valve 5 to adjust the pressure to the test pressure required for the methanol injector 10 (the adjustment range can reach 0 - 15 Bar). At this time, the injection performance of the methanol injector 10 can be observed through the transparent observation box 12. After the methanol injector 10 injects stably, the third switch valve 16 can be closed, the electronic scale 15 can be tared and timed, and the second switch valve 13 can be closed. The mass of methanol injected by the methanol injector 10 during the timed period can be obtained by reading the indication of the electronic scale 15. Through conversion, the flow rate of the methanol injector 10 can be measured.

[0059] 2. Durability test of the methanol injector:

[0060] Repeat the above preliminary work. The methanol injector 10 works under the set pressure, and methanol is injected into the transparent observation box 12. The flow direction of methanol is as follows:

[0061] Methanol tank 18 → Methanol pump 1 → First one-way valve 2 → Safety valve 3 → Pressure stabilizing tank 4 (→ Pressure regulating valve 5 → Methanol tank 18) → First switch valve 9 → Methanol injector 10 → Transparent observation box 12 → Second switch valve 13 → Measuring cup 14 → Third switch valve 16 → Methanol tank 18, realizing the recycling of methanol. Keep the methanol pump 1 and the methanol injector 10 always on, and the durability test of the methanol injector 10 can be carried out.

[0062] The above embodiments are the preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and are all included in the protection scope of the present utility model.

Claims

1. A simple low-pressure methanol injector test bench, characterized by: It comprises a methanol tank (18), a methanol pump (1), a pressure-stabilizing tank (4), a first switch valve (9), a methanol injector (10), a sealing plate (11) and a transparent observation box (12); The methanol tank (18) stores methanol; The methanol pump (1) is connected to the methanol tank (18) via a pipeline, and the methanol pump (1) is also connected to the pressure-surge tank (4) via a pipeline; The pressure stabilizing tank (4) is connected to the methanol injector (10) via a pipeline, the first switch valve (9) is arranged on the pipeline connecting the pressure stabilizing tank (4) and the methanol injector (10), the methanol injector (10) is mounted and fixed on a sealing plate (11), the sealing plate (11) is covered on a transparent observation box (12), and the methanol injector (10) injects methanol into the transparent observation box (12) after being turned on.

2. The simple low-pressure methanol injector test bench according to claim 1 is characterized in that: It also includes a measuring cup (14), a second switch valve (13) and a third switch valve (16); The measuring cup (14) is connected to the transparent observation box (12) via a pipeline, and the second switch valve (13) is arranged on the pipeline connecting the measuring cup (14) and the transparent observation box (12); The measuring cup (14) is connected to the methanol tank (18) via a pipeline, and the third switch valve (16) is arranged on the pipeline connecting the measuring cup (14) and the methanol tank (18).

3. The simple low-pressure methanol injector test bench according to claim 1 is characterized in that: A first one-way valve (2) and a safety valve (3) are installed on the pipeline connecting the methanol pump (1) and the pressure-stabilizing tank (4); the safety valve (3) is also connected to the methanol tank (18) through a pipeline.

4. The simple low-pressure methanol injector test bench according to claim 1 is characterized in that: A pressure regulating valve (5) and a pressure gauge (6) are installed at the upper end of the pressure stabilizing tank (4), and the pressure regulating valve (5) is connected to the methanol tank (18) through a pipeline.

5. The simple low-pressure methanol injector test bench according to claim 1 is characterized in that: The sealing plate (11) and the transparent observation box (12) are sealedly connected.

6. The simple low-pressure methanol injector test bench according to claim 1 is characterized in that: A second one-way valve (7) is also provided on the pipeline connecting the pressure-stabilizing tank (4) and the methanol injector (10).

7. The simple low-pressure methanol injector test bench according to claim 2 is characterized in that: It also includes an electronic scale (15), on which the measuring cup (14) is placed.

8. The simple low-pressure methanol injector test bench according to claim 1 is characterized in that: Exhaust fans (8) are installed above and obliquely below the low-pressure methanol injector test bench, and a methanol concentration detector (17) is installed near the exhaust fan (8) at the oblique bottom.

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