Testing device for pre-inspection of oil injector

Abstract

The utility model discloses a testing device for pre-inspection of a fuel injector, which comprises a device shell, a protective door is arranged in front of the device shell, a transparent acrylic door plate is arranged on the protective door, a workbench is arranged in the device shell, and a motor is arranged on the workbench. The workbench is provided with an oil sprayer clamp for rapidly installing and fixing an oil sprayer and an acrylic baffle for preventing the oil sprayer from spraying oil mist. According to the device, stable and reliable oil way pressure is automatically provided by the plunger pump motor set, so that people cannot be tired; the pressure transmitter is used for measuring the pressure in an oil path and transmitting the pressure data to the display, so that the pressure of the system can be accurately displayed; the universal fuel injector clamp is convenient and fast to mount and has no potential safety hazard after the protective door is closed; and after the oil sprayer is installed, the nozzle sprays oil to the personnel for atomization, and observation is clearer.

Description

Technical Field

[0001] The utility model relates to a testing device, in particular to a testing device for pre-checking a fuel injector. Background Art

[0002] The injector is an important component to maintain the operation of the diesel engine. It consists of the injector body, the injector nozzle, the support, the spring, etc. The high-pressure oil is pumped into the injector oil supply port, and the high pressure is generated in the injector body and acts on the injector nozzle cone. When the oil pressure exceeds the set value, the injector valve core opens, and the high-pressure oil is sprayed from the nozzle hole and burns in the engine cylinder in the form of mist, so that the piston reciprocates. Therefore, it is required to have a large dynamic flow range, strong anti-clogging and anti-pollution capabilities, and good spray characteristics. The spray characteristics of the injector include atomization particle size, oil mist distribution, oil beam direction, range and diffusion cone angle. These characteristics should meet the requirements of the diesel engine combustion system to make the mixture form and combustion perfect, and obtain higher power and thermal efficiency.

[0003] The fuel injector is a precision device with very high processing accuracy, so its manufacturing and sales price is also very expensive. Since the fuel injector is used very frequently in the car, it will cause wear or blockage over time, affecting its spray characteristics, causing the engine to fail to achieve the ideal power and heat conversion efficiency, so it can only be replaced or repaired. Considering its expensive price, it is generally chosen to be removed from the car for repair so that the spray characteristics of the fuel injector can reach the best state. The maintenance personnel need to hold the fuel injector to observe the spray situation. Since the system is a high-pressure device, there are safety hazards; the fuel injector is facing away from the maintenance personnel when spraying, so it is impossible to clearly observe the spray situation of the fuel injector and it is impossible to confirm whether each injection hole is spraying. Utility Model Content

[0004] The utility model provides a test device for pre-checking a fuel injector, which is used to overcome the defect in the prior art that the fuel injector is difficult to detect visually due to the installation position relationship of the fuel injector.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] The utility model discloses a test device for pre-inspection of a fuel injector, comprising a device shell, a protective door is arranged in front of the device shell, a transparent acrylic door plate is arranged on the protective door, a workbench is arranged inside the device shell, a fuel injector fixture for quickly installing and fixing the fuel injector and an acrylic baffle for blocking the fuel injector from spraying oil mist are arranged on the workbench.

[0007] Furthermore, a support foot is provided at the bottom of the device shell, which serves as a shock absorber for supporting the device. An oil drain valve is provided on the side to discharge the waste oil collected on the workbench. A refueling port is provided on the top to inject diesel into the device tank. A manual overflow valve is provided at the lower front part to manually adjust the system pipeline pressure.

[0008] Furthermore, the protective door is connected to the device housing through a hinge to isolate the internal oil mist from scattering and play a sealing and protective role. A handle is provided at the bottom to pull the device protective door upward.

[0009] Furthermore, a high-pressure oil supply connector and a mesh mist suction port are respectively provided on both sides of the injector fixture. The high-pressure oil supply connector is connected to the injector to provide high-pressure diesel to the injector. The mesh mist suction port is connected to the centrifugal fan through the rear flange A. The oil mist is sucked in and collected from the mist suction port, and the centrifugal fan absorbs the oil mist in the operating space.

[0010] Furthermore, flange B connects the centrifugal fan and an oil mist filter element located below the centrifugal fan. The oil mist filter element filters and collects the air with oil mist blown in by the centrifugal fan and discharges oil-free air.

[0011] Furthermore, an oil tank for storing diesel is provided on a side of the device housing away from the workbench, and a liquid level sensor for observing the oil level is provided on the oil tank.

[0012] Furthermore, a plunger pump motor unit and a high-pressure solenoid valve are provided on both sides above the oil tank. When the high-pressure solenoid valve is energized, the oil circuit is closed, the injector can be tested for pressure maintenance, and the plunger pump motor unit is used to provide high-pressure oil.

[0013] Furthermore, a pressure transmitter for measuring the system oil circuit pressure is provided on the top of the inner wall of the device housing, and the filter on the side wall thereof filters the oil circuit to prevent large particles from entering the injector and causing the injector to be blocked.

[0014] The beneficial effects achieved by the utility model are as follows: the device automatically provides stable and reliable oil circuit pressure by the plunger pump motor unit, and personnel will not be fatigued; the pressure in the oil circuit is measured by the pressure transmitter, and the pressure data is transmitted to the display, which can accurately display the size of the system pressure; the universal injector fixture is convenient and quick to install, and there is no safety hazard after closing the protective door; and after the injector is installed, the nozzle sprays oil atomization toward the personnel, and observation is clearer; the centrifugal fan and the oil mist filter element can suck in and filter the oil mist in the operating space, and discharge oil-free air, which will not cause respiratory damage to personnel and will not cause air pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 This is a working state diagram of the utility model. Figure 1 ;

[0018] Figure 3 This is a working state diagram of the utility model. Figure 2 ;

[0019] Figure 4 It is a rear view schematic diagram of the utility model;

[0020] Figure 5 It is a side view schematic diagram of the utility model.

[0021] In the figure: 1. Device housing; 2. Support feet; 3. Oil drain valve; 4. Transparent acrylic door panel; 5. Handle; 6. Manual overflow valve; 7. Oil filling port; 8. Protective door; 9. Hinge; 10. Acrylic baffle; 11. High-pressure oil supply connector; 12. Mesh mist suction port; 13. Injector fixture; 14. Flange A; 15. Centrifugal fan; 16. Flange B; 17. Oil mist filter element; 18. Plunger pump motor unit; 19. Oil tank; 20. Pressure transmitter; 21. Filter; 22. High-pressure solenoid valve; 23. Liquid level sensor. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0023] Example 1

[0024] like Figure 1-5 As shown, a test device for pre-inspection of an injector comprises a device housing 1, a protective door 8 is provided on the front of the device housing 1, a transparent acrylic door panel 4 is provided on the protective door 8, a workbench is provided inside the device housing 1, and an injector fixture 13 for quickly installing and fixing the injector and an acrylic baffle 10 for blocking the injector from spraying oil mist are provided on the workbench.

[0025] The bottom of the device housing 1 is provided with a support foot 2, which serves as a shock absorber for supporting the device. A drain valve 3 is provided on its side to discharge the waste oil collected on the workbench. The transparent acrylic door panel 4 facilitates observation after the protective door is closed. A handle 5 is provided at the bottom of the protective door 8 to pull the device protective door upward. A refueling port 7 is provided at the top of the device housing 1 to inject diesel into the device tank. A manual overflow valve 6 is provided at the lower part of the front to manually adjust the system pipeline pressure. The protective door 8 is connected to the device housing 1 through a hinge 9 to isolate the internal oil mist from scattering and play a sealing and protective role. The shape of the oil mist is observed on the acrylic baffle 10. A high-pressure oil supply connector 11 and a mesh mist suction port 12 are provided on both sides of the injector fixture 13, respectively. The high-pressure oil supply connector 11 is connected to the injector to provide high-pressure diesel to the injector. The mesh mist suction port 12 is connected to the centrifugal fan 15 through the rear flange A14, and the oil mist is sucked and collected from the mist suction port, and the centrifugal fan 15 absorbs the oil mist in the operating space. The flange B16 connects the centrifugal fan 15 and the oil mist filter element 17 located below it, and the oil mist filter element 17 filters and collects the air with oil mist blown in by the centrifugal fan 15, and discharges oil-free air.

[0026] A fuel tank 19 for storing diesel is provided on one side of the device housing 1 away from the workbench. A liquid level sensor 23 for observing the oil level is provided on the fuel tank 19. A plunger pump motor unit 18 and a high-pressure solenoid valve 22 are provided on both sides above the fuel tank 19. When the high-pressure solenoid valve 22 is energized, the oil circuit is closed and the injector can be tested for pressure maintenance. The plunger pump motor unit 18 is used to provide high-pressure oil. A pressure transmitter 20 for measuring the system oil circuit pressure is provided on the top of its inner wall. The filter 21 on the inner side wall of the device housing 1 filters the oil circuit to prevent larger particles from entering the injector and causing the injector to be blocked.

[0027] Steps:

[0028] 1. After the fuel injector is installed and fixed on the fuel injector fixture 13, use a high-pressure pipe to connect the fuel supply port of the fuel injector and the high-pressure fuel supply connector 11;

[0029] 2. Place the acrylic baffle 10 in front of the fuel injection port of the fuel injector;

[0030] 3. Close the protective door 8;

[0031] 4. Press the start button to start the test and observe through the transparent acrylic door panel 4 whether the injector spray is normal to determine whether the injector needs maintenance, thereby achieving the purpose of injector pre-inspection.

[0032] It should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein by equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention. The terms used in the description of this application are only for describing specific implementations, and are not intended to limit the exemplary implementations according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0034] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words 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, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

Claims

1. A test device for pre-checking a fuel injector, characterized in that: The device comprises a housing, a protective door is arranged in front of the housing, a transparent acrylic door panel is arranged on the protective door, a workbench is arranged inside the housing, a fuel injector fixture for quickly installing and fixing the fuel injector and an acrylic baffle for blocking the fuel injector from spraying oil mist are arranged on the workbench.

2. The test device for pre-testing the fuel injector according to claim 1, characterized in that: A support foot is provided at the bottom of the device shell, which serves to support the device and reduce shock. An oil drain valve is provided on the side to discharge waste oil collected on the workbench. A refueling port is provided on the top to inject diesel into the device tank. A manual overflow valve is provided at the lower front part to manually adjust the system pipeline pressure.

3. The test device for pre-testing the fuel injector according to claim 1, characterized in that: The protective door is connected to the device housing through a hinge, and is used to isolate the internal oil mist from scattering and play a sealing and protective role. A handle is provided at the bottom of the door, which is used to pull the device protective door upwards.

4. The test device for pre-checking the fuel injector according to claim 1, characterized in that: A high-pressure oil supply connector and a mesh mist suction port are respectively provided on both sides of the injector fixture. The high-pressure oil supply connector is connected to the injector to provide high-pressure diesel to the injector. The mesh mist suction port is connected to the centrifugal fan through the rear flange A. The oil mist is sucked in and collected from the mist suction port, and the centrifugal fan absorbs the oil mist in the operating space.

5. The test device for pre-checking the fuel injector according to claim 4, characterized in that: Flange B connects the centrifugal fan and an oil mist filter element located below the centrifugal fan. The oil mist filter element filters and collects the air with oil mist blown in by the centrifugal fan and discharges oil-free air.

6. The test device for pre-testing the fuel injector according to claim 1, characterized in that: An oil tank for storing diesel is arranged on one side of the device housing away from the workbench, and a liquid level sensor for observing the oil level is arranged on the oil tank.

7. The test device for pre-testing the fuel injector according to claim 6, characterized in that: A plunger pump motor unit and a high-pressure solenoid valve are respectively provided on both sides above the oil tank. When the high-pressure solenoid valve is energized, the oil circuit is closed and the injector can perform a pressure-maintaining test. The plunger pump motor unit is used to provide high-pressure oil.

8. The test device for pre-testing the fuel injector according to claim 1, characterized in that: A pressure transmitter for measuring the system oil circuit pressure is arranged on the top of the inner wall of the device housing, and a filter on the side wall thereof filters the oil circuit to prevent large particles from entering the injector and causing the injector to be blocked.

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