Test bed for detecting leakage of control valve of oil injector

Abstract

The utility model discloses a fuel injector control valve leakage detection test bench comprising a test platform, the bottom surface of the test platform is fixedly connected with a supporting column, the top surface of the test platform is provided with a limiting groove, a plurality of fuel injectors are respectively in threaded connection with a plurality of external thread connecting pipes, and a driving assembly is started to drive a lifting mechanism to rotate. Through threaded connection in the lifting mechanism, the test box and the partition plates can be driven to move downwards to enter the limiting grooves, the test box is sealed through the sealing assembly, the fuel injectors are divided into a plurality of detection spaces through the partition plates, the test mechanism is started, and the fuel injectors are filled with nitrogen through a plurality of external threaded connection pipes. By starting the plurality of nitrogen detectors, the leakage states of the plurality of oil injectors can be detected at the same time, the aim of conveniently carrying out leakage detection tests on the plurality of oil injectors at the same time is achieved, and the problem that the production detection efficiency of the oil injectors is greatly reduced due to the fact that most of existing detection test tables can only detect single oil injectors at a time is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of injector control valve detection, in particular to a detection test bench for injector control valve leakage. Background Art

[0002] The fuel injector is actually a simple solenoid valve. When the solenoid coil is energized, suction is generated, the needle valve is sucked up, the spray hole is opened, and the fuel is sprayed out at high speed through the annular gap between the needle at the head of the needle valve and the spray hole, forming a mist, which is conducive to full combustion. In the past, the fuel injector used in diesel engines was mechanically controlled. The mechanical diesel nozzle works by controlling precision parts (needle valve, needle valve body).

[0003] After the injector control valve is produced, it needs to be leak-tested on a test bench. However, the existing test benches can only test a single injector at a time, and it is difficult to perform sealing tests on multiple injectors at the same time, which greatly reduces the production inspection efficiency of the injector. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a test bench for detecting leakage of a fuel injector control valve, which is used to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A test bench for detecting leakage of an injector control valve comprises a test platform, wherein a support column is fixedly connected to the bottom surface of the test platform, a limit groove is provided on the top surface of the test platform, an external threaded connecting pipe is fixedly connected to the inner wall of the test platform, a limit bracket is fixedly connected to the top surface of the test platform, a limit slider is slidably connected to the inner wall of the limit bracket, a test box is fixedly connected to the surface of the limit slider, and the surface of the test box is slidably connected to the inner wall of the limit groove, a partition is fixedly connected to the inner wall of the test box, and the inner wall of the partition is slidably connected to the inner wall of the limit groove, a nitrogen detector is fixedly connected to the inner wall of the test box, a testing mechanism is arranged at the bottom of the test platform, a sealing assembly is arranged inside the limit groove, a lifting mechanism is arranged on the back of the limit bracket, and a driving assembly is arranged on the top surface of the limit bracket.

[0007] Preferably, the testing mechanism consists of an air intake hood, an air intake pipe and an air pump, the air intake hood is fixedly connected to the bottom surface of the test platform, the air outlet end of the air intake pipe is fixedly connected to the inner wall of the air intake hood, the air pump is fixedly connected to the inner wall of the air intake pipe, and the air pump is fixedly connected to the bottom surface of the air intake hood.

[0008] Preferably, the sealing assembly consists of a first sealing gasket and a second sealing gasket, the first sealing gasket is fixedly connected to the inner wall of the limiting groove, the second sealing gasket is fixedly connected to the bottom surface of the test box, and the second sealing gasket is fixedly connected to the bottom surface of the partition, and the second sealing gasket overlaps the first sealing gasket.

[0009] Preferably, the lifting mechanism consists of a limit ring, a threaded rod and a threaded sleeve, the limit ring is fixedly connected to the back of the limit bracket, the threaded rod is rotatably connected to the inner wall of the limit ring, and the threaded rod is rotatably connected to the inner wall of the test platform, the threaded sleeve is fixedly connected to the back of the test box, and the inner wall of the threaded sleeve is threadedly connected to the threaded rod.

[0010] Preferably, the driving assembly consists of a servo motor, a worm and a worm wheel, the servo motor is fixedly connected to the top surface of the limiting bracket, the worm is fixedly connected to the output end of the servo motor, the worm wheel is fixedly connected to the surface of the threaded rod, and the worm wheel is meshed with the worm.

[0011] Preferably, there are multiple externally threaded connecting pipes, and all of the multiple externally threaded connecting pipes are located inside the test platform.

[0012] Preferably, the air intake hood is rectangular and is made of metal material.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the detection test bench for the leakage of the injector control valve respectively connects a plurality of injectors with a plurality of external threaded connecting pipes, starts a driving component to drive the lifting mechanism to rotate, and through the threaded connection in the lifting mechanism, drives the test box and the partition to move downward into the limit groove, seals the test box through the sealing component, separates the plurality of injectors into a plurality of detection spaces through the partition, starts the test mechanism to fill nitrogen into the plurality of injectors through the plurality of external threaded connecting pipes, and starts a plurality of nitrogen detectors to simultaneously detect the leakage status of the plurality of injectors; the goal of facilitating the leakage detection test of a plurality of injectors at the same time is achieved, and the problem that the production detection efficiency of the injectors is greatly reduced because the existing detection test bench can mostly detect a single injector at a time is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the structural survey drawing of the utility model;

[0015] Figure 2 This is an enlarged view of the structure A of the utility model;

[0016] Figure 3 It is a left sectional view of the structure of the utility model;

[0017] Figure 4 This is an enlarged view of the structure B of the utility model;

[0018] Figure 5 This is an enlarged view of the structure C of the utility model.

[0019] In the figure: 1. test platform; 2. support column; 3. limit groove; 4. external threaded connecting pipe; 5. limit bracket; 6. limit slider; 7. test box; 8. partition; 9. nitrogen detector; 10. air intake hood; 11. air intake pipe; 12. air pump; 13. first sealing gasket; 14. second sealing gasket; 15. limit ring; 16. threaded rod; 17. threaded sleeve; 18. servo motor; 19. worm; 20. worm wheel. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Reference Figure 1-5 A test bench for detecting leakage of a fuel injector control valve comprises a test platform 1, a support column 2 is fixedly connected to the bottom surface of the test platform 1, a limiting groove 3 is arranged on the top surface of the test platform 1, an external threaded connecting pipe 4 is fixedly connected to the inner wall of the test platform 1, the number of the external threaded connecting pipes 4 is multiple, and the multiple external threaded connecting pipes 4 are all located inside the test platform 1, which is convenient for connecting multiple fuel injectors at the same time, thereby improving the detection efficiency of the fuel injector, a limiting bracket 5 is fixedly connected to the top surface of the test platform 1, a limiting slider 6 is slidably connected to the inner wall of the limiting bracket 5, a test box 7 is fixedly connected to the surface of the limiting slider 6, and the surface of the test box 7 is slidably connected to the inner wall of the limiting groove 3, a partition 8 is fixedly connected to the inner wall of the test box 7, and the inner wall of the partition 8 is slidably connected to the inner wall of the limiting groove 3, and a nitrogen detector 9 is fixedly connected to the inner wall of the test box 7 A test mechanism is provided at the bottom of the test platform 1, and the test mechanism consists of an air intake hood 10, an air intake pipe 11 and an air pump 12. The air intake hood 10 is rectangular and made of metal material. The air intake hood 10 made of metal material has higher strength, is not easily deformed or damaged after being subjected to gas pressure, and is more durable. The air intake hood 10 is fixedly connected to the bottom surface of the test platform 1, the air outlet end of the air intake pipe 11 is fixedly connected to the inner wall of the air intake hood 10, the air pump 12 is fixedly connected to the inner wall of the air intake pipe 11, and the air pump 12 is fixedly connected to the bottom surface of the air intake hood 10, which is used to drive nitrogen into the injector, so as to facilitate the detection of the sealing performance of the injector through the leakage state of nitrogen, thereby improving the detection efficiency. A sealing component is provided inside the limit groove 3, a lifting mechanism is provided on the back of the limit bracket 5, and a driving component is provided on the top surface of the limit bracket 5.

[0022] Specifically, the sealing assembly consists of a first sealing gasket 13 and a second sealing gasket 14. The first sealing gasket 13 is fixedly connected to the inner wall of the limiting groove 3, the second sealing gasket 14 is fixedly connected to the bottom surface of the test box 7, and the second sealing gasket 14 is fixedly connected to the bottom surface of the partition 8, and the second sealing gasket 14 overlaps the first sealing gasket 13, which is used to seal the test box 7, thereby improving the accuracy of gas sealing detection.

[0023] Specifically, the lifting mechanism is composed of a limit ring 15, a threaded rod 16 and a threaded sleeve 17. The limit ring 15 is fixedly connected to the back of the limit bracket 5, the threaded rod 16 is rotatably connected to the inner wall of the limit ring 15, and the threaded rod 16 is rotatably connected to the inner wall of the test platform 1, the threaded sleeve 17 is fixedly connected to the back of the test box 7, and the inner wall of the threaded sleeve 17 is threadedly connected to the threaded rod 16, which is used to drive the test box 7 to lift and move, so as to facilitate the disassembly and assembly of the injector.

[0024] Specifically, the driving assembly consists of a servo motor 18, a worm 19 and a worm wheel 20. The servo motor 18 is fixedly connected to the top surface of the limit bracket 5, the worm 19 is fixedly connected to the output end of the servo motor 18, the worm wheel 20 is fixedly connected to the surface of the threaded rod 16, and the worm wheel 20 is meshed with the worm 19, which is used to drive the lifting mechanism to rotate, facilitate the conversion of rotational force into lifting force, and improve the lifting stability.

[0025] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0026] When in use: first, the inner walls of the plurality of injectors are respectively threadedly connected with the surfaces of the plurality of externally threaded connecting pipes 4. After the connection is completed, the servo motor 18 is started to drive the worm 19 to rotate, and the worm 19 is meshed with the worm wheel 20 to drive the threaded rod 16 to rotate along the inner wall of the limit ring 15 and the inner wall of the test platform 1. The threaded connection between the threaded rod 16 and the threaded sleeve 17 drives the test box 7 and the partition 8 to move downward into the limit groove 3. The movement of the test box 7 drives the second sealing gasket 14 to overlap with the first sealing gasket 13 to seal the test box 7. The plurality of injectors are separated into a plurality of detection spaces by the partition 8. The intake end of the intake pipe 11 is connected to the nitrogen storage device. The air pump 12 is started to draw nitrogen through the intake pipe 11 into the intake cover 10. After the nitrogen enters the intake cover 10, it enters the plurality of injectors through the plurality of externally threaded connecting pipes 4. At the same time, the plurality of nitrogen detectors 9 are started to perform leakage detection on the plurality of injectors through the separation of the partition 8.

[0027] In summary, in the test bench for detecting leakage of the injector control valve, multiple injectors are respectively threadedly connected to multiple external threaded connecting pipes 4, and the driving component is started to drive the lifting mechanism to rotate. Through the threaded connection in the lifting mechanism, the test box 7 and the partition 8 can be driven to move downward into the limit groove 3, and the test box 7 is sealed by the sealing component. The multiple injectors are divided into multiple detection spaces by the partition 8. The test mechanism is started to fill nitrogen into the multiple injectors through the multiple external threaded connecting pipes 4, and the leakage status of the multiple injectors can be detected simultaneously by starting multiple nitrogen detectors 9, thereby achieving the goal of facilitating leakage detection tests on multiple injectors at the same time, avoiding the problem that the production detection efficiency of the injector is greatly reduced because most of the existing detection test benches can only detect a single injector at a time, and is used to solve the problems raised in the above-mentioned background technology.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test bench for detecting leakage of a fuel injector control valve, comprising a test platform (1), characterized in that: The bottom surface of the test platform (1) is fixedly connected to a support column (2), the top surface of the test platform (1) is provided with a limit groove (3), the inner wall of the test platform (1) is fixedly connected to an external threaded connecting pipe (4), the top surface of the test platform (1) is fixedly connected to a limit bracket (5), the inner wall of the limit bracket (5) is slidably connected to a limit slider (6), the surface of the limit slider (6) is fixedly connected to a test box (7), and the surface of the test box (7) is slidably connected to the inner wall of the limit groove (3), the inner wall of the test box (7) is fixedly connected to a partition (8), and the inner wall of the partition (8) is slidably connected to the inner wall of the limit groove (3), the inner wall of the test box (7) is fixedly connected to a nitrogen detector (9), the bottom of the test platform (1) is provided with a testing mechanism, the inner wall of the limit groove (3) is provided with a sealing component, the back of the limit bracket (5) is provided with a lifting mechanism, and the top surface of the limit bracket (5) is provided with a driving component.

2. The test bench for detecting leakage of a fuel injector control valve according to claim 1, characterized in that: The test mechanism is composed of an air intake hood (10), an air intake pipe (11) and an air pump (12); the air intake hood (10) is fixedly connected to the bottom surface of the test platform (1); the air outlet end of the air intake pipe (11) is fixedly connected to the inner wall of the air intake hood (10); the air pump (12) is fixedly connected to the inner wall of the air intake pipe (11); and the air pump (12) is fixedly connected to the bottom surface of the air intake hood (10).

3. The test bench for detecting leakage of a fuel injector control valve according to claim 1, characterized in that: The sealing assembly is composed of a first sealing gasket (13) and a second sealing gasket (14), wherein the first sealing gasket (13) is fixedly connected to the inner wall of the limiting groove (3), the second sealing gasket (14) is fixedly connected to the bottom surface of the test box (7), and the second sealing gasket (14) is fixedly connected to the bottom surface of the partition (8), and the second sealing gasket (14) overlaps the first sealing gasket (13).

4. The test bench for detecting leakage of a fuel injector control valve according to claim 1, characterized in that: The lifting mechanism is composed of a limit ring (15), a threaded rod (16) and a threaded sleeve (17); the limit ring (15) is fixedly connected to the back of the limit bracket (5); the threaded rod (16) is rotatably connected to the inner wall of the limit ring (15); the threaded rod (16) is rotatably connected to the inner wall of the test platform (1); the threaded sleeve (17) is fixedly connected to the back of the test box (7); and the inner wall of the threaded sleeve (17) is threadedly connected to the threaded rod (16).

5. The test bench for detecting leakage of a fuel injector control valve according to claim 1, characterized in that: The drive assembly is composed of a servo motor (18), a worm (19) and a worm wheel (20); the servo motor (18) is fixedly connected to the top surface of the limit bracket (5); the worm (19) is fixedly connected to the output end of the servo motor (18); the worm wheel (20) is fixedly connected to the surface of the threaded rod (16); and the worm wheel (20) is meshed with the worm (19).

6. The test bench for detecting leakage of a fuel injector control valve according to claim 1, characterized in that: There are multiple external threaded connecting pipes (4), and the multiple external threaded connecting pipes (4) are all located inside the test platform (1).

7. The test bench for detecting leakage of a fuel injector control valve according to claim 2, characterized in that: The air intake hood (10) is rectangular in shape, and is made of metal material.

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