Seal detection device and method for spin-on fuel filter processing

Abstract

The invention discloses a sealing detection device and method for processing a fuel filter of a spin-on machine, comprising: pressure detection elements are provided at the ends of the inflation joint and the exhaust joint, the pressure detection elements are used to detect the change of air pressure inside the detection tank, the inflation joint is connected to an inflation pipeline, and the exhaust joint is connected to an exhaust pipeline; the inlet end of each inflation pipeline is connected to a first air pump in parallel, and the outlet end of each exhaust pipeline is connected to a second air pump in parallel; a sealing mechanism is assembled and connected at the top of the detection tank, and the sealing mechanism is used to fix the filter and seal the detection tank; the top of the sealing mechanism is connected to a pneumatic rod; the present invention can realize dry online detection by means of inflation detection, which is pollution-free and high-precision; each detection tank is equipped with a separate inflation pipeline and exhaust pipeline, so that each filter can be detected separately during transportation without interfering with each other.

Description

Technical Field

[0001] The invention belongs to the technical field of engine fuel filter processing, and in particular relates to a sealing detection device and method for processing a spin-on engine fuel filter. Background Art

[0002] During the working process of a motor vehicle, fuel is filtered through the filter element and then enters the cylinder to burn and do work. The internal combustion engine needs oil lubrication to rotate. The oil needs to be filtered by the filter to remove harmful solid particles and impurities during the circulation of the internal combustion engine. The filtering effect of fuel and oil by the filter directly affects the working state and service life of the engine.

[0003] After the filter is produced, it needs to be tested for sealing to ensure that the filter does not leak oil. The traditional testing method is to immerse the filter in water and observe whether there are bubbles in the water to determine whether the product is leaking. However, this method is inefficient and requires workers to observe one by one. Environmental factors and human factors will affect the detection accuracy. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a seal detection device for spin-on fuel filter processing, and the specific technical solution is as follows:

[0005] A sealing detection device for processing a spin-on fuel filter comprises a support mechanism, a base is installed on the top of the support mechanism, and the support mechanism is used to drive the base to rotate; the surface of the base is provided with support tubes in a ring array, and the top of each support tube is provided with a detection tank, and a gas detection element is installed on the inner wall of the detection tank, and the gas detection element is used to detect whether the detection tank is leaking, and an inflation joint and an exhaust joint are provided at the inner bottom of the detection tank, and pressure detection elements are provided at the ends of the inflation joint and the exhaust joint, and the pressure detection element is used to detect the change of air pressure inside the detection tank, and the inflation joint is connected with an inflation pipeline, and the exhaust joint is connected with an exhaust pipeline;

[0006] The inlet end of each of the inflation pipelines is connected in parallel to the first air pump, and the outlet end of each of the exhaust pipelines is connected in parallel to the second air pump; the top of the detection tank is equipped with a sealing mechanism, which is used to fix the filter and seal the detection tank; the top of the sealing mechanism is connected to a pneumatic rod.

[0007] Furthermore, the sealing mechanism includes a cover plate, an assembly tube, a spring and a clamp, the top surface of the cover plate is connected to the pneumatic rod, the bottom surface of the cover plate is provided with an assembly tube, the inner wall of the assembly tube is provided with springs distributed in a circular array, the inner end of each spring is connected to a clamp, the bottom end of the clamp is a slope structure, the filter is plugged into the inside of the clamp, and the cover plate is attached to the top surface of the test tank.

[0008] Furthermore, the sealing mechanism also includes a second sealing ring, an annular sealing groove is formed at the top of the detection tank, and the second sealing ring is embedded in the sealing groove.

[0009] Furthermore, the inflation joint and the exhaust joint have the same structure, and a first sealing ring is provided on the outer wall of the end of the inflation joint. The first sealing ring is embedded in the inflation joint, and the cross-section of the first sealing ring is truncated cone-shaped.

[0010] Furthermore, the supporting mechanism includes a base and a rotating motor. The rotating motor is installed inside the base, and the rotating motor is transmission-connected to the base.

[0011] Furthermore, a positioning ring is provided in the middle of the inner wall of the detection tank, and the filter is fitted and sleeved inside the positioning ring.

[0012] A seal detection method for spin-on fuel filter processing, the method comprising:

[0013] S1. Loading:

[0014] Install the filter in the sealing mechanism;

[0015] The pneumatic rod pushes the sealing mechanism to assemble with the detection tank, the cavity area between the filter and the detection tank is a closed detection cavity, the inlet and outlet air joints of the filter are respectively inserted into the charging joint and the exhaust joint, the pressure detection element extends into the filter, and the first air pump and the second air pump are kept normally open;

[0016] S2, inflation:

[0017] Open the inflation pipeline and close the exhaust pipeline, so that nitrogen enters the detection tank through the inflation joint, and when the pressure value detected by the pressure detection element reaches the set value, close the inflation pipeline;

[0018] S3, pressure maintenance:

[0019] Determining whether the pressure drop rate of the pressure detection element exceeds a preset value;

[0020] If yes, it means there is a gap in the filter assembly, and an alarm will sound;

[0021] If no, it means that the filter assembly is normal, and the process goes to S4;

[0022] S4. Detection:

[0023] The gas detection element detects whether there is nitrogen in the sealed chamber;

[0024] If yes, it means the filter is leaking and an alarm will be given;

[0025] If no, it means that the filter is not leaking, and the process goes to S5;

[0026] S5. Nitrogen recovery:

[0027] Open the exhaust pipeline so that nitrogen is extracted and stored through the exhaust joint;

[0028] S6, unloading:

[0029] The pneumatic rod moves upward, so that the filter leaves the detection tank.

[0030] The beneficial effects of the present invention are:

[0031] 1. Through the method of inflation detection, dry online detection can be realized, which is pollution-free and high-precision;

[0032] 2. Each test tank is equipped with a separate air filling pipeline and air extraction pipeline, so that each filter can be tested separately during the transportation process without interfering with each other;

[0033] 3. The provision of the first sealing ring and the second sealing ring can improve the overall sealing of the test tank, improve the connection sealing between the filter and the inflation joint and the exhaust joint, avoid gas leakage at the joint, and ensure the stability of the internal environment of the test tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The structural schematic diagram of the sealing detection device for spin-on fuel filter processing of the present invention is shown;

[0035] Figure 2 The figure shows the connection structure diagram of the inflation pipeline and the exhaust pipeline of the present invention;

[0036] Figure 3 A schematic diagram of the sealing mechanism assembly structure of the present invention is shown;

[0037] Figure 4 A schematic diagram of the installation structure of the inflation joint of the present invention is shown;

[0038] As shown in the figure: 1. supporting mechanism, 11. base, 12. rotating motor, 2. detection tank, 21. positioning ring, 22. sealing groove, 23. gas detection element, 24. inflation joint, 241. first sealing ring, 25. exhaust joint, 26. pressure detection element, 3. supporting tube, 4. sealing mechanism, 41. cover plate, 42. assembly tube, 43. spring, 44. splint, 45. second sealing ring, 5. pneumatic rod, 6. first air pump, 61. inflation pipeline, 7. second air pump, 71. exhaust pipeline, 8. base. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] The sealing detection device for spin-on fuel filter processing comprises a support mechanism 1, a base 9 is installed on the top of the support mechanism 1, and the support mechanism 1 is used to drive the base 9 to rotate;

[0041] The surface of the base 9 is provided with support tubes 3 in an annular array, and each of the support tubes 3 is provided with a detection tank 2 at the top. The detection tanks 2 distributed in an annular array can be convenient for loading and unloading, and multiple detection tanks 2 can be tested cyclically;

[0042] A gas detection element 23 is installed on the inner wall of the detection tank 2, and the gas detection element 23 is used to detect whether the detection tank 2 is leaking; the gas detection element 23 exemplarily adopts a high-sensitivity gas sensor: measurement range: 0-5000ppm; resolution: 0.1ppm;

[0043] An air charging joint 24 and an air extraction joint 25 are provided at the inner bottom of the detection tank 2. Pressure detection elements 26 are provided at the ends of the air charging joint 24 and the air extraction joint 25. The pressure detection elements 26 are used to detect the change of the internal air pressure of the detection tank 2. The pressure detection element 26 is used to extend into the detection tank 2 to detect the internal air pressure of the detection tank 2 and determine whether the connection at the joint is normal. Pressure sensor: measurement range: 0-0.8MPa, accuracy: 1KPa;

[0044] The inflation connector 24 is connected to an inflation pipeline 61, and the exhaust connector 25 is connected to an exhaust pipeline 71; the inlet end of each inflation pipeline 61 is connected in parallel to the first air pump 6, and the outlet end of each exhaust pipeline 71 is connected in parallel to the second air pump 7; each inflation connector 24 and exhaust connector 25 is a separate group, and is separately configured with an inflation pipeline 61 and an exhaust pipeline 71, so that each filter can be detected separately without interfering with each other;

[0045] The top of the detection tank 2 is equipped with a sealing mechanism 4, which is used to fix the filter and seal the detection tank 2; the top of the sealing mechanism 4 is connected to a pneumatic rod 5; the pneumatic rod 5 is used to drive the sealing mechanism 4 to move up and down.

[0046] As an improvement of the above technical solution, the sealing mechanism 4 includes a cover plate 41, an assembly tube 42, a spring 43 and a clamping plate 44. The top surface of the cover plate 41 is connected to the pneumatic rod 5. The bottom surface of the cover plate 41 is provided with an assembly tube 42. The inner wall of the assembly tube 42 is provided with springs 43 distributed in a circular array. The inner end of each spring 43 is connected to a clamping plate 44. The clamping plate 44 is used to clamp and fix the filter and facilitate installation and disassembly.

[0047] The bottom end of the clamping plate 44 is a sloped structure, the filter is inserted into the inside of the clamping plate 44, and the cover plate 41 is attached to the top surface of the detection tank 2; the sloped structure is used to guide the detection tank 2, making it easier to insert the detection tank 2; the cover plate 41 is used to seal the detection tank 2 to form a detection sealed space.

[0048] As an improvement of the above technical solution, the sealing mechanism 4 also includes a second sealing ring 45. An annular sealing groove 22 is opened at the top of the detection tank 2, and the second sealing ring 45 is embedded in the sealing groove 22. The second sealing ring 45 and the sealing groove 22 are arranged to further improve the sealing performance and form a multi-pass barrier structure.

[0049] As an improvement of the above technical solution, the inflation joint 24 and the exhaust joint 25 have the same structure, and a first sealing ring 241 is provided on the outer wall of the end of the inflation joint 24. The first sealing ring 241 is embedded in the inflation joint 24, and the cross-section of the first sealing ring 241 is truncated cone-shaped; the first sealing ring 241 is used to further improve the sealing of the connection between the joint and the detection tank 2, avoid nitrogen leakage at the connection, and ensure the sealing of the entire detection process; the truncated cone shape is used to ensure that when the detection tank 2 is assembled from top to bottom, the contact surface will gradually increase and the sealing will gradually increase.

[0050] As an improvement of the above technical solution, the support mechanism 1 includes a base 11 and a rotating motor 12. The base 11 is equipped with a rotating motor 12, and the rotating motor 12 is connected to the base 9 by transmission. The rotating motor 12 is used to drive the base 9 to rotate, thereby realizing the transition of each filter between the loading station and the unloading station.

[0051] As an improvement of the above technical solution, a positioning ring 21 is provided in the middle of the inner wall of the detection tank 2, and the filter is fitted inside the positioning ring 21; the positioning ring 21 is used to support the filter from the middle, so that the filter is more stable and will not shake left and right.

[0052] A seal detection method for spin-on fuel filter processing, the method comprising:

[0053] S1. Loading:

[0054] Install the filter in the sealing mechanism 4; this step is used to achieve rapid assembly and positioning;

[0055] Specifically, the filter to be tested is manually inserted from bottom to top into the assembly tube 42, with the two joints of the filter facing downward. During the insertion process, the filter moves upward along the bottom slope of the clamping plate 44. When fully inserted, the filter pushes the clamping plate 44 outward and compresses the spring 43. The spring 43 pushes the clamping plate 44 in the opposite direction and clamps the filter.

[0056] The pneumatic rod 5 pushes the sealing mechanism 4 to assemble with the detection tank 2. The cavity area between the filter and the detection tank 2 is a closed detection cavity. The inlet and outlet air joints of the filter are respectively inserted into the charging joint 24 and the exhaust joint 25. The pressure detection element 26 extends into the filter. The first air pump 6 and the second air pump 7 are kept normally open. This step is used to complete the installation of the filter and the sealing of the detection tank 2 at the same time, thereby improving the installation efficiency.

[0057] Specifically, the pneumatic rod 5 drives the sealing mechanism 4 and the filter to move downward at the same time, and the filter enters the detection tank 2. When moving a certain distance, the air inlet and outlet joints of the filter are plugged together with the charging joint 24 and the exhaust joint 25. During the plugging process, the charging joint 24 gradually enters the filter joint and gradually compresses the first sealing ring 241. The action of the exhaust joint 25 is the same as that of the charging joint 24. When the second sealing ring 45 is completely inserted into the sealing groove 22, the pneumatic rod 5 stops moving, the cover plate 41 seals the detection tank 2, and the joint of the filter is also stably plugged together with the charging joint 24 and the exhaust joint 25. The positioning ring 21 supports the filter, thereby completing the sealing of the detection tank 2 and the assembly of the filter at the same time. After the assembly is completed, the first air pump 6 and the second air pump 7 are started and kept normally open. The air pumps are kept normally open and the valves on different pipelines are controlled separately, thereby realizing the separate control of each detection component.

[0058] S2, inflation:

[0059] Open the charging pipeline 61 and close the exhaust pipeline 71, so that nitrogen enters the detection tank 2 through the charging joint 24. When the pressure value detected by the pressure detection element 26 reaches the set value, close the charging pipeline 61. This step is used to charge a sufficient amount of nitrogen for subsequent detection. Through nitrogen detection, online dry detection can be achieved without pollution.

[0060] Specifically, the valve on the inflation pipeline 61 is opened, so that the nitrogen discharged by the first air pump 6 enters the inflation pipeline 61, while the inflation pipeline whose valve is not opened is not filled with nitrogen, and the nitrogen is discharged into the filter through the inflation pipeline and the inflation joint. Since the exhaust pipeline 71 is in a closed state, the nitrogen will not be discharged from the filter; during the process of discharging nitrogen, the gas detection element will detect the air pressure in the filter in real time. When the internal air pressure reaches the set value, the inflation is stopped and the inflation pipeline is closed; the inflation time is 0.5s;

[0061] S3, pressure maintenance:

[0062] Determine whether the pressure drop rate of the pressure detection element 26 exceeds a preset value;

[0063] If yes, it means there is a gap in the filter assembly, and an alarm will sound;

[0064] If not, it means that the filter assembly is normal, and the process goes to S4; this step is used to determine whether there is a gap between the filter and the charging connector 24 and the exhaust connector 25, so as to avoid detection errors caused by nitrogen leaking into the detection tank 2;

[0065] Maintain the pressure for 1 second. During this stage, the pressure detection element 26 detects the air pressure in the filter in real time. If the pressure drop rate is ≥5% / s, it is determined that the product and the tooling are not installed properly and an external leakage has occurred, and an alarm prompt will be issued;

[0066] S4. Detection:

[0067] The gas detection element 23 detects whether there is nitrogen in the sealed chamber;

[0068] If yes, it means the filter is leaking and an alarm will be given;

[0069] If no, it means that the filter is not leaking, and the process goes to S5;

[0070] This step is used to detect the sealing of the filter;

[0071] The gas detection element 23 detects the nitrogen in the sealed chamber in real time. The gas detection element 23 is distributed as a group in a ring array. Multiple groups can be distributed up and down in the sealed chamber. The detection time is 5-8s.

[0072] S5. Nitrogen recovery:

[0073] Open the exhaust pipeline so that nitrogen can be extracted and stored through the exhaust joint 25;

[0074] Through the rapid extraction method, the gas in the tested product system is extracted cleanly, the test system environment is kept in compliance with the test standards, and the next cycle is entered;

[0075] S6, unloading:

[0076] The pneumatic rod 5 moves upward, so that the filter leaves the detection tank 2.

[0077] The high-sensitivity gas sensor exemplarily adopts the SNG1004-NO2 type; the pressure detection element exemplarily adopts a MEMS pressure sensor with an I2C interface.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seal detection device for spin-on fuel filter processing, characterized in that: The invention comprises a support mechanism (1), wherein a base (9) is installed on the top of the support mechanism (1), and the support mechanism (1) is used to drive the base (9) to rotate; support tubes (3) are installed in a circular array on the surface of the base (9), and a detection tank (2) is provided at the top of each support tube (3); a gas detection element (23) is installed on the inner wall of the detection tank (2), and the gas detection element (23) is used to detect whether the detection tank (2) is leaking; an inflation joint (24) and an exhaust joint (25) are provided at the inner bottom of the detection tank (2), and the inflation joint (24) and the exhaust joint (25) are provided. The end of the air extraction joint (25) is provided with a pressure detection element (26), and the pressure detection element (26) is used to detect the change of the internal air pressure of the detection tank (2); the inflation joint (24) is connected to an inflation pipeline (61), and the air extraction joint (25) is connected to an exhaust pipeline (71); the inlet end of each inflation pipeline (61) is connected in parallel to the first air pump (6), and the outlet end of each exhaust pipeline (71) is connected in parallel to the second air pump (7); the top of the detection tank (2) is equipped with a sealing mechanism (4), and the sealing mechanism (4) is used to fix the filter and the sealing member. The detection tank (2) is provided with a sealing mechanism (4) having a top connected to a pneumatic rod (5); the sealing mechanism (4) comprises a cover plate (41), an assembly tube (42), a spring (43) and a clamping plate (44); the top surface of the cover plate (41) is connected to the pneumatic rod (5); the bottom surface of the cover plate (41) is provided with an assembly tube (42); the inner wall of the assembly tube (42) is provided with springs (43) distributed in a circular array; the inner end of each spring (43) is connected to a clamping plate (44); the bottom end of the clamping plate (44) is an inclined structure; the filter is plugged into the clamping plate (44); Internally, the cover plate (41) is attached to the top surface of the detection tank (2); the sealing mechanism (4) further comprises a second sealing ring (45); an annular sealing groove (22) is provided at the top of the detection tank (2); the second sealing ring (45) is embedded in the sealing groove (22); the inflation joint (24) and the exhaust joint (25) have the same structure; a first sealing ring (241) is provided on the outer wall of the end of the inflation joint (24); the first sealing ring (241) is embedded in the inflation joint (24); the cross section of the first sealing ring (241) is truncated cone-shaped.

2. The sealing detection device for spin-on fuel filter processing according to claim 1, characterized in that: The support mechanism (1) comprises a base (11) and a rotating motor (12); the rotating motor (12) is installed inside the base (11), and the rotating motor (12) is connected to the base (9) in a transmission manner.

3. The sealing detection device for spin-on fuel filter processing according to claim 1, characterized in that: A positioning ring (21) is provided in the middle of the inner wall of the detection tank (2), and the filter is fitted and sleeved inside the positioning ring (21).

4. A seal detection method for spin-on fuel filter processing, characterized in that: Using the sealing detection device for spin-on fuel filter processing according to any one of claims 1 to 3, the method comprises: S1. Loading: Install the filter in the sealing mechanism (4); The pneumatic rod (5) pushes the sealing mechanism (4) to assemble with the detection tank (2); the cavity area between the filter and the detection tank (2) is a closed detection cavity; the air inlet and outlet joints of the filter are respectively inserted into the charging joint (24) and the air extraction joint (25); the pressure detection element (26) extends into the filter; and the first air pump (6) and the second air pump (7) are kept normally open; S2, inflation: Opening the gas charging pipeline (61) and closing the gas extraction pipeline (71) so that nitrogen enters the detection tank (2) through the gas charging joint (24); when the pressure value detected by the pressure detection element (26) reaches a set value, closing the gas charging pipeline (61); S3, pressure maintenance: Determining whether the pressure drop rate of the pressure detection element (26) exceeds a preset value; If yes, it means there is a gap in the filter assembly, and an alarm will sound; If no, it means that the filter assembly is normal, and the process goes to S4; S4. Detection: The gas detection element (23) detects whether nitrogen exists in the sealed detection cavity; If yes, it means the filter is leaking and an alarm will be given; If no, it means that the filter is not leaking, and the process goes to S5; S5. Nitrogen recovery: Opening the exhaust pipeline, so that nitrogen is extracted and stored through the exhaust joint (25); S6, unloading: The pneumatic rod (5) moves upward, causing the filter to leave the detection tank (2).

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