Device for detecting air tightness of oil nozzle

Abstract

The utility model relates to the technical field of corrugated board processing, and discloses an oil nozzle air tightness detection device, which comprises a base, a sealing detector fixedly arranged on one side of the upper end of the base, a pressure measuring hose fixedly arranged on one side of the sealing detector, and a guide cylinder fixedly arranged on one side of the upper end of the base. A rectangular plate is fixedly arranged at the position, located at the rear end of the guide cylinder, of the upper end of the base, a fastening structure is arranged at the upper end of the rectangular plate and comprises a case, a two-way lead screw is arranged in the case, sliding blocks are arranged on the two sides of the outer wall of the two-way lead screw in a threaded mode, and clamping rods are fixedly arranged at the front ends of the sliding blocks; and an oil nozzle body is arranged in the placing cavity. The oil nozzle air tightness detection device disclosed by the utility model can quickly fasten the oil nozzle body.

Description

Technical Field

[0001] This utility model relates to the field of fuel injector testing technology, specifically a fuel injector airtightness testing device. Background Technology

[0002] Fuel injectors work by generating a magnetic field to lift a valve needle, opening the valve so that fuel can be sprayed from the injection hole. The biggest advantage of fuel injection is that the fuel supply is very precise. However, in the current production process of automotive engine fuel injectors, there is no airtightness testing device for them. The fuel injector airtightness testing device is used to check whether there is leakage during the operation of the fuel injector and ensure its sealing performance.

[0003] The existing patent with publication number CN216621655U proposes a device for testing the air tightness of automotive fuel injectors. The device uses a first cylinder to push a first pressure block and a second cylinder to push a second pressure block to seal the first and second air pipes of the automotive fuel injector, respectively. Gas is then introduced into the automotive fuel injector through the air inlet connector on the first pressure block, and the reading of the air pressure sensor is observed. If the air pressure reaches the preset value, it indicates that the automotive fuel injector has good sealing performance. If the air pressure does not reach the preset value, it indicates that there is an air leak in the automotive fuel injector.

[0004] The device requires the operation of the first and second cylinders to seal the injector body, but it cannot quickly fix the vertical injector body that is open at both ends. Therefore, the device cannot be used to perform sealing tests on vertical injector bodies that are open at both ends. Utility Model Content

[0005] The purpose of this utility model is to provide a fuel injector airtightness testing device to solve the problem that existing devices cannot quickly fix the vertical fuel injector body that is open at both ends, and that the device cannot be used to test the seal of the vertical fuel injector body that is open at both ends.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fuel injector airtightness testing device, comprising a base, a sealing tester fixedly mounted on one side of the upper end of the base, a pressure testing hose fixedly mounted on one side of the sealing tester, a guide cylinder fixedly mounted on one side of the upper end of the base, a rectangular plate fixedly mounted on the upper end of the base at the rear end of the guide cylinder, a fastening structure mounted on the upper end of the rectangular plate, the fastening structure comprising a housing, a bidirectional lead screw mounted inside the housing, sliders threaded on both sides of the outer wall of the bidirectional lead screw, a clamping rod fixedly mounted at the front end of the sliders, and a placement cavity opened inside the guide cylinder, wherein the fuel injector body is placed inside the placement cavity.

[0007] Preferably, a guide structure is provided on one side of the sealing tester located at the lower end of the pressure testing hose. The guide structure includes a fixed frame fixedly installed on one side of the sealing tester, a guide rod fixedly installed on one side of the fixed frame, a guide plate fixedly installed at the lower end of the outer wall of the pressure testing hose, and the upper end of the guide rod sliding inside the guide plate.

[0008] Preferably, a sealing gasket is fixedly provided at the lower end of the guide plate.

[0009] Preferably, a sealing ring is fixedly provided on the inner wall of the bottom end of the placement cavity.

[0010] Preferably, the base has a rectangular groove at its front end, a storage box is slidably disposed inside the rectangular groove, and a pull rod is fixedly disposed at the front end of the storage box.

[0011] Preferably, the fixing frame is provided with a screw, which passes through one side of the fixing frame and is threadedly connected to one side of the sealing tester.

[0012] Preferably, an L-plate is fixedly provided on the rear side of the upper end of the base.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1) By setting a fastening structure, when it is necessary to test the sealing performance of a vertical fuel injector body that is open at both ends, the vertical fuel injector body that is open at both ends is placed into the placement cavity, and the double-ended screw is rotated to achieve quick fastening.

[0015] 2) By setting up a guide structure, when it is necessary to send the pressure testing tube at the lower end of the pressure testing hose into the inlet at the upper end of the vertical fuel injector, the guide plate can be manually pressed down to achieve the guiding docking of the fuel injector and the pressure testing hose, thus speeding up the efficiency of manual docking by the testing personnel. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a fuel injector airtightness testing device according to an embodiment of the present utility model;

[0017] Figure 2 This is a partial cross-sectional view of the structure in an embodiment of the present utility model;

[0018] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0019] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0020] Figure 5 This is a schematic diagram of the guide plate and guide rod structure in an embodiment of this utility model.

[0021] In the diagram: 1. Base; 2. Sealing tester; 3. Pressure testing hose; 4. Rectangular plate; 5. Fastening structure; 6. Chassis; 7. Two-way lead screw; 8. Clamping rod; 9. Guide cylinder; 10. Placement cavity; 11. Injector body; 12. Sealing ring; 13. Guide structure; 14. Fixing frame; 15. Guide plate; 16. Guide rod; 17. Sealing gasket; 18. Storage box. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Combination Figures 1-5 A fuel injector airtightness testing device includes a base 1, a sealing tester 2 fixedly mounted on one side of the upper end of the base 1, a pressure testing hose 3 fixedly mounted on one side of the sealing tester 2, a guide cylinder 9 fixedly mounted on one side of the upper end of the base 1, a rectangular plate 4 fixedly mounted on the upper end of the base 1 at the rear end of the guide cylinder 9, a fastening structure 5 mounted on the upper end of the rectangular plate 4, the fastening structure 5 including a housing 6, a bidirectional lead screw 7 mounted inside the housing 6, sliders threaded on both sides of the outer wall of the bidirectional lead screw 7, a clamping rod 8 fixedly mounted at the front end of the sliders, a placement cavity 10 opened inside the guide cylinder 9, and a fuel injector body 11 mounted inside the placement cavity 10.

[0025] See Figure 1 , Figure 4 and Figure 5 Furthermore, a sealing gasket 17 is fixedly installed at the lower end of the guide plate 15, a sealing ring 12 is fixedly installed on the inner wall of the bottom end of the placement cavity 10, a rectangular groove is opened at the front end of the base 1, a storage box 18 is slidably installed inside the rectangular groove, a pull rod is fixedly installed at the front end of the storage box 18, a screw is installed inside the fixing frame 14, the screw passes through one side of the fixing frame 14 and is threadedly connected to one side of the sealing tester 2, and an L plate is fixedly installed on the rear side of the upper end of the base 1.

[0026] Specifically, when the pressure testing personnel press down on the guide plate 15, the sealing gasket 17 can ensure that the lower end of the guide plate 15 is in close contact with the upper end of the fuel injector body 11, the sealing ring 12 can ensure that the lower end of the fuel injector body 11 is tightly fitted, and the storage box 18 is used to store the tools used during the operation.

[0027] Example 2

[0028] See Figure 2 , Figure 3 , Figure 4 Furthermore, based on Embodiment 1, a guide structure 13 is provided on one side of the sealing tester 2 located at the lower end of the pressure testing hose 3. The guide structure 13 includes a fixed frame 14 fixedly installed on one side of the sealing tester 2, a guide rod 16 fixedly installed on one side of the fixed frame 14, a guide plate 15 fixedly installed at the lower end of the outer wall of the pressure testing hose 3, and the upper end of the guide rod 16 sliding inside the guide plate 15.

[0029] Specifically, the fixing bracket 14 is used to set the guide rod 16. The cooperation between the guide plate 15 and the guide rod 16 can realize the rapid guidance between the lower end of the pressure measuring hose 3 and the upper end of the fuel injector body 11.

[0030] In actual operation, the injector body 11 to be tested is vertically placed into the placement cavity 10. The injector body 11 is manually pressed down so that the lower end of the injector body 11 is in close contact with the sealing ring 12. The double screw 7 is rotated so that the two sets of sliders drive the clamping rod 8 to clamp the sides of the injector body 11, achieving quick fastening while ensuring the sealing of the lower end of the injector body 11.

[0031] Manually move the guide plate 15 down so that the guide plate 15 slides down inside the guide rod 16, so that the lower end of the pressure testing hose 3 enters the inlet at the upper end of the fuel injector body 11, keeping the guide plate 15 squeezed, and at the same time adjust the seal detector 2 to achieve the pressure testing operation.

[0032] After the pressure test is completed, manually loosen the guide plate 15 to reset the two sets of clamping rods 8, thereby removing the fuel injector body 11 from the inside of the guide cylinder 9 for the next fuel injector body 11 sealing test.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fuel injector airtightness testing device, comprising a base (1), a sealing tester (2) fixedly mounted on one side of the upper end of the base (1), and a pressure testing hose (3) fixedly mounted on one side of the sealing tester (2), characterized in that: A guide cylinder (9) is fixedly installed on one side of the upper end of the base (1). A rectangular plate (4) is fixedly installed on the upper end of the base (1) at the rear end of the guide cylinder (9). A fastening structure (5) is installed on the upper end of the rectangular plate (4). The fastening structure (5) includes a housing (6). A two-way screw (7) is installed inside the housing (6). A slider is threaded on both sides of the outer wall of the two-way screw (7). A clamping rod (8) is fixedly installed at the front end of the slider. A placement cavity (10) is opened inside the guide cylinder (9). An oil injector body (11) is installed inside the placement cavity (10).

2. The fuel injector airtightness testing device according to claim 1, characterized in that: A guide structure (13) is provided on one side of the sealing tester (2) located at the lower end of the pressure testing hose (3). The guide structure (13) includes a fixed frame (14) fixedly installed on one side of the sealing tester (2). A guide rod (16) is fixedly installed on one side of the fixed frame (14). A guide plate (15) is fixedly installed at the lower end of the outer wall of the pressure testing hose (3). The upper end of the guide rod (16) slides inside the guide plate (15).

3. The fuel injector airtightness testing device according to claim 2, characterized in that: A sealing gasket (17) is fixedly provided at the lower end of the guide plate (15).

4. The fuel injector airtightness testing device according to claim 1, characterized in that: A sealing ring (12) is fixedly installed on the inner wall of the bottom end of the placement cavity (10).

5. The fuel injector airtightness testing device according to claim 1, characterized in that: The base (1) has a rectangular groove at its front end, and a storage box (18) is slidably arranged inside the rectangular groove. A pull rod is fixedly arranged at the front end of the storage box (18).

6. The fuel injector airtightness testing device according to claim 2, characterized in that: The fixing frame (14) is equipped with a screw rod inside, which passes through one side of the fixing frame (14) and is threadedly connected to one side of the sealing tester (2).

7. The fuel injector airtightness testing device according to claim 1, characterized in that: An L-plate is fixedly installed on the rear side of the upper end of the base (1).

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