CN109186894B

CN109186894B - Umbrella valve airtight detection device and method

Info

Publication number: CN109186894B
Application number: CN201811297380.4A
Authority: CN
Inventors: 陈霆; 张巍; 刘冰; 杨朝华
Original assignee: Jiangsu Shuofan Intelligent Equipment Co ltd
Current assignee: Jiangsu Shuofan Intelligent Equipment Co ltd
Priority date: 2018-11-01
Filing date: 2018-11-01
Publication date: 2023-08-15
Anticipated expiration: 2038-11-01
Also published as: CN109186894A

Abstract

The application discloses an umbrella valve airtight detection device which comprises an upper cylinder assembly, a lower cylinder assembly, an airtight detector, a vacuum generator, a profiling and a support. The vacuum generator is in fluid communication with the profiling, the airtight detector is in fluid communication with the vacuum generator and is used for detecting air flow transmitted by the vacuum generator, the engine oil cup opening is upwards placed on the support, and the profiling is arranged below the support and is matched with the umbrella valve outer ring on the bottom surface of the engine oil cup to form a seal. The upper cylinder assembly is arranged above the engine oil cup to apply downward pressure to the engine oil cup, the lower cylinder assembly is arranged below the profiling and applies upward pressure to the profiling, and a sealed space is formed in a space defined by the profiling and the bottom of the engine oil cup through the upper cylinder assembly and the lower cylinder assembly during detection. The application uses airtight detection, so the sensitivity is high and the response speed is high.

Description

Umbrella valve airtight detection device and method

Technical Field

The application relates to the field of engine detection, in particular to an umbrella valve airtight detection device and method.

Background

The oil cup is a component part in an automobile oil supply system, fuel oil can be stored in the oil cup, and when the fuel pump works, the fuel oil rushes out of the umbrella valve from the oil tank to enter the oil cup, and then enters the oil supply pipeline. When the fuel pump stops working, the umbrella valve falls down to seal the oil cup, and fuel can be stored in the oil cup. So that the next time the fuel pump is started, fuel can be quickly supplied to the engine. Therefore, the sealing performance of the umbrella valve is very important and is an important detection index.

However, the existing technology basically uses a manual tap to pour water, and after the water is poured, whether the water drops are observed, and the water is poured out after the observation is finished. This detection using water relies mainly on visual observation, and has two problems. One problem is that there is a difference in judgment criteria for each person, and fluctuation in the work state of the worker affects judgment. Another problem is that the observation time is short, and a small amount of leakage of water, which is colorless and transparent, is not easily detected in a short time. Furthermore, the following disadvantages are present:

1, irrigation needs a certain time, and the production beat is slowed down.

2, the naked eye observation after water irrigation is dependent on the operation of workers, and the problem of missing detection is also solved, and the problem is influenced by the fluctuation of the working state of the workers.

And 3, directly pouring out water after detection to cause resource waste.

And 4, the detected product is also required to be dried, and the working procedures are increased.

Disclosure of Invention

The application aims to provide an umbrella valve airtight detection device and a method for detecting the sealing performance of an umbrella valve in an engine oil cup, so as to solve the problems in the prior art.

In order to solve the above problems, according to one aspect of the present application, there is provided an umbrella valve airtight detecting apparatus for detecting an umbrella valve sealing performance in an engine oil cup, the umbrella valve airtight detecting apparatus comprising an upper cylinder assembly, a lower cylinder assembly, an airtight detecting instrument, a vacuum generator, a profile and a support, the vacuum generator being in fluid communication with the profile, the airtight detecting instrument being in fluid communication with the vacuum generator and detecting an air flow rate transmitted from the vacuum generator, an engine oil cup opening being placed upwardly on the support, the profile being disposed below the support and forming a seal with an umbrella valve outer ring of a bottom surface of the engine oil cup, the upper cylinder assembly being mounted above the engine oil cup to apply a downward pressure to the engine oil cup, the lower cylinder assembly being mounted below the profile and applying an upward pressure to the profile, the profile forming a sealed space with a space in a bottom of the engine oil cup upon detection by an action of the upper cylinder assembly and the lower cylinder assembly.

In one embodiment, the contoured upper portion has a recess, the periphery of which mates with and seals against an umbrella valve outer ring of the engine oil cup bottom surface.

In one embodiment, the profile comprises a cylindrical body, an upper protrusion integrally extends from the upper end of the cylindrical body, a pit is formed on the upper surface of the upper protrusion, a cavity is formed in the pit, a gas inlet in fluid communication with the cavity is formed on the side wall of the cylindrical body, and the vacuum generator is connected with the gas inlet through a pipeline.

In one embodiment, the support comprises a top plate, a bottom plate and a stand column connecting the top plate and the bottom plate, a boss is arranged above the top plate, an opening matched with the outline of the engine oil cup is formed in the middle of the boss, the engine oil cup is installed in the opening, and the lower cylinder assembly is arranged on the bottom plate.

In one embodiment, the umbrella valve airtight detection device further comprises a frame, wherein the frame comprises an upper frame and a lower frame, a platform is arranged between the lower frame and the upper frame, the support is installed on the platform, and the upper cylinder assembly, the airtight detector and the vacuum generator are installed on the upper frame.

In one embodiment, the umbrella valve airtight detection device further comprises an upper cylinder mounting frame and a limiting piece, wherein the upper cylinder mounting frame is mounted on the platform, and the limiting piece is arranged on the upper cylinder mounting frame and used for limiting when the upper cylinder moves downwards to a certain position, so that the cylinder is prevented from continuously moving downwards to crush the engine oil cup.

In one embodiment, the upper cylinder assembly comprises an upper cylinder and a pressure head, wherein a piston shaft of the upper cylinder is fixedly connected with the pressure head, and the shape of the pressure head is matched with the shape of an opening of the engine oil cup, so that the engine oil cup is pressed from top to bottom when the upper cylinder operates.

In one embodiment, the lower cylinder assembly includes a lower cylinder and a connector disposed between the lower cylinder and the profile and exerting an upward force on the profile when the lower cylinder is in operation, thereby sealing the profile against the bottom of the engine oil cup.

According to another aspect of the present application there is provided a method for detecting the sealing performance of an umbrella valve in an engine oil cup, comprising the steps of:

firstly, placing an engine oil cup with an opening upwards on a platform, and using an air cylinder to drive a pressure head to press and fix the engine oil cup from top to bottom;

step two, utilizing profiling to upwards prop against an umbrella valve outer ring at the bottom of an engine oil cup and wrap the umbrella valve outer ring to form sealing;

step three, connecting a vacuum generator with the profiling through a pipeline to generate certain negative pressure;

detecting the air flow transmitted by the vacuum generator by using an airtight detector;

and fifthly, judging whether the sealing performance is good or not according to the leakage quantity.

Preferably, the method is implemented using the umbrella valve airtight detection apparatus described above.

The application uses airtight detection, so the sensitivity is high and the response speed is high. The use of the instrument gets rid of the defect of large fluctuation of manual detection and ensures the consistency of detection standards. Because of the high sensitivity, a small amount of leakage can be detected in a short time, and the inspection accuracy is improved without increasing the production time. And the water does not need to be filled again in the detection process, a step is omitted, so that the problem of resource waste does not exist due to the fact that water filling does not exist, and compared with the prior art, the method has the advantages that one procedure is omitted due to the fact that blow-drying is not needed, the production efficiency is improved, and the reliability is higher due to the fact that the detection of tightness does not depend on naked eye observation but on instruments. In addition, the umbrella valve test is carried out from the bottom of the engine oil cup by using the negative pressure method, so that the whole test device and the test sample can be tested after being installed, the test is convenient, and the test result is accurate and reliable.

Drawings

FIG. 1 is a perspective view of an engine oil cup;

FIG. 2 is a bottom view of the engine oil cup of FIG. 1;

FIG. 3 is a schematic perspective view of an umbrella valve airtight detection apparatus of the present application;

FIG. 4 is a schematic view of a portion of the assembly of the umbrella valve airtight detection apparatus of FIG. 3;

FIG. 5 is a contoured perspective view of the present application;

FIG. 6 is a perspective view of the mount of the present application;

FIG. 7 is a perspective view of the lower cylinder, connector and contoured assembly of the assembly; and

fig. 8 is a perspective view of the lower cylinder, the connector, and the assembly formed by the contoured mounting on the support.

Detailed Description

The preferred embodiments of the present application will be described in detail below with reference to the attached drawings, so that the objects, features and advantages of the present application will be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the application, but rather are merely illustrative of the true spirit of the application.

Fig. 1 is a perspective view of an engine oil cup 20 detected by using the umbrella valve airtight detecting apparatus of the present application, and fig. 2 is a bottom view of the engine oil cup 20 of fig. 1, and as shown in fig. 1-2, the bottom of the engine oil cup 20 has an umbrella valve 21. The oil cup is an important component in an automobile oil supply system, fuel can be stored in the oil cup, and when the fuel pump works, the fuel rushes out of the umbrella valve from the fuel tank to enter the oil cup, and then enters the oil supply pipeline. When the fuel pump stops working, the umbrella valve falls down to seal the oil cup, and the fuel can be stored in the oil cup, so that the fuel can be rapidly supplied to the engine when the fuel pump is started next time. The sealing performance of the umbrella valve is very important. The conventional detection method is to detect the engine oil from the inside of the engine oil cup, for example, by using a positive pressure such as water pressure.

The present inventors have found a method of detecting from the bottom of an oil cup by means of negative pressure after a lot of experiments and creative thinking, and the following detailed description will be made with reference to the accompanying drawings.

Fig. 3 is a perspective view of an umbrella valve airtight detecting apparatus 100 for detecting an airtight performance of an umbrella valve in an engine oil cup according to the present application, as shown in fig. 3, the umbrella valve airtight detecting apparatus 100 generally includes an upper cylinder assembly 50, a lower cylinder assembly 70, an airtight detecting instrument 40, a vacuum generator 30, a profile 90 and a support 80, the vacuum generator 30 is in fluid communication with the profile 90, the airtight detecting instrument 40 is in fluid communication with the vacuum generator 30 and is used for detecting an air flow rate transmitted from the vacuum generator 30, an opening of the engine oil cup 20 to be detected is upwardly placed on the support 30, the profile 90 is disposed below the support 30 and cooperates with an umbrella valve outer ring (see fig. 3) of a bottom surface of the engine oil cup 20 to form a seal, wherein the upper cylinder assembly 50 is installed above the engine oil cup 20 to apply a downward pressure to the engine oil cup, the lower cylinder assembly 70 is installed below the profile 90 and applies an upward pressure to the profile 90, so that a sealed space defined in a bottom of the engine oil cup 20 is formed by an effect of the upper cylinder assembly 50 and the lower cylinder assembly 70 upon detection, and a leak of the air flow rate is detected by the air flow rate detector, thereby judging an airtight performance of the air flow rate is bad according to the air leakage of the air valve.

In one embodiment, as shown in FIG. 1, the umbrella valve airtight detecting apparatus 100 utilizes a frame-type supporting structure, such as a frame 100, the frame 100 including a frame and a lower frame, a platform 11 provided between the lower frame and the upper frame, a support 80 mounted on the platform 11, and an upper cylinder assembly 50, an airtight detector 40, and a vacuum generator 30 mounted on the upper frame. Preferably, the umbrella valve airtight detecting device 100 of the present application further comprises a display screen 60, wherein the display screen 60 is mounted on the upper frame for assisting the airtight detecting instrument to display the air density. Rollers are further provided on four legs of the lower frame of the frame 100, thereby facilitating the transportation of the umbrella valve airtight detecting apparatus 100.

Fig. 4 is a schematic view of a part of the components of the umbrella valve airtight detecting apparatus 100 of fig. 3. As shown in fig. 3 to 4, the upper cylinder assembly 50 includes a ram 51 and an upper cylinder 52, the piston shaft of the upper cylinder 52 is fixedly connected to the ram 51, and the ram 51 is shaped to match the shape of the opening of the engine oil cup 20, so that the ram 51 can move from the upper to the lower and press against the engine oil cup when the upper cylinder 52 is operated to open, thereby pressing the engine oil cup downward.

Referring to fig. 4, in one embodiment, the umbrella valve airtight detecting apparatus 100 further includes an upper cylinder mount 13 and a stopper 14. The upper cylinder mounting bracket 13 is mounted on the platform 11, the limiting piece 14 is arranged on the upper cylinder mounting bracket 13, the limiting plate 53 is arranged above the pressure head 51 of the upper cylinder, the limiting piece 14 is provided with the limiting post 15, when the piston of the upper cylinder 52 drives the pressure head 51 to move downwards to a certain position, the limiting post 15 on the limiting piece 14 is contacted with the limiting plate 53 mounted above the pressure head 51, so that the upper cylinder 52 is prevented from continuously moving downwards to crush the engine oil cup 20.

With continued reference to fig. 4, the upper cylinder mount 13 is similar to a basketball stand with the upper cylinder assembly being bent forward and extended, the upper cylinder assembly being mounted on the bent portion, and the stopper 14 being mounted in the middle of the vertical portion of the upper cylinder mount 13. So design, make upper portion cylinder subassembly can steady operation under the circumstances of guaranteeing not taking up more space, space utilization is high, and the part is arranged compactly.

With continued reference to fig. 3-4, the lower cylinder assembly 70 includes a connector 71 and a lower cylinder 72, the connector 71 being disposed between the lower cylinder 72 and the profile 90, exerting an upward force on the profile 72 as the piston of the lower cylinder 72 moves upward, pushing the profile 72 upward against the bottom of the engine oil cup 20.

The profile 72 is described in detail below with reference to fig. 5. Fig. 5 is a perspective view of the profile 90 of the present application, as shown in fig. 5, the profile 90 includes a cylindrical body 91, an upper protrusion 92 integrally protruding from an upper end of the cylindrical body 91, a recess 93 formed on an upper surface of the upper protrusion 92, a chamber (not shown) formed in the recess 93, a gas inlet 94 formed on a sidewall of the cylindrical body 91 in fluid communication with the chamber, and the vacuum generator 30 connected to the gas inlet 94 through a pipe so as to be in fluid communication with the chamber inside the profile 90. The outer periphery of the recess 93 cooperates with the outer ring of the umbrella valve on the bottom surface of the engine cup 20 (see fig. 2) and is sealed by being pushed upward by the piston of the lower cylinder.

The mount 80 of the present application is described in detail below with reference to fig. 6. Fig. 6 is a perspective view of a support 80 according to the present application, as shown in fig. 6, the support 80 includes a top plate 81, a bottom plate 82, and a column 85 connecting the top plate 81 and the bottom plate 82, a boss 84 is provided above the top plate 81, an opening 83 is formed in the middle of the boss 84 to match the contour of the engine oil cup 20, the engine oil cup 20 is installed in the opening 83, and the lower cylinder assembly 70 is disposed on the bottom plate 82.

Fig. 7 is a perspective view of the lower cylinder 72, the connecting member 71, and the profile 90 when assembled together, and fig. 8 is a perspective view of the assembly of the lower cylinder 72, the connecting member 71, and the profile 90 mounted on the mount 80. As shown in fig. 7 to 8, the profile 90 is installed in an opening of a top plate of the top plate 81 of the support 80, the cylinder 72 is installed on the bottom plate 82 of the support 80, the connection 71 is installed on the cylinder 80, and the profile 90 is installed on the connection 71 and aligned upward with the umbrella valve 21 on the bottom surface of the engine oil cup 20, so as to be abutted upward and form a sealed space with the umbrella valve 21 when the piston of the lower cylinder 72 moves upward, thereby detecting the air tightness of the umbrella valve 21 under the action of the vacuum generator and the air tightness detector.

When detection is needed, firstly, the engine oil cup 20 is placed on the support 80 with an opening upwards, the upper cylinder 52 drives the pressure head 51 to press and fix the engine oil cup 20 from top to bottom, secondly, the profiling 90 is used for upwards supporting the outer ring of the umbrella valve 21 at the bottom of the engine oil cup 20 and wrapping the outer ring of the umbrella valve to form sealing, then the vacuum generator 30 is connected with the profiling 90 through a pipeline to generate certain negative pressure, the air flow transmitted by the vacuum generator is detected by the air tightness detector, and the sealing performance is judged according to the leakage quantity.

The application uses airtight detection, so the sensitivity is high and the response speed is high. The use of the instrument gets rid of the defect of large fluctuation of manual detection and ensures the consistency of detection standards. Because of the high sensitivity, a small amount of leakage can be detected in a short time, and the inspection accuracy is improved without increasing the production time.

While the preferred embodiments of the present application have been described in detail, it will be appreciated that those skilled in the art, upon reading the above teachings, may make various changes and modifications to the application. Such equivalents are also intended to fall within the scope of the application as defined by the following claims.

Claims

1. An umbrella valve airtight detection device is used for detecting the sealing performance of an umbrella valve in an engine oil cup and is characterized by comprising an upper cylinder assembly, a lower cylinder assembly, an airtight detector, a vacuum generator, a profile and a support, wherein an engine oil cup opening is upwards arranged on the support, the profile is arranged below the support and comprises a cylindrical main body, an upper bulge integrally extends out of the upper end of the cylindrical main body, a pit is formed on the upper surface of the upper bulge, a cavity is formed in the pit, the periphery of the pit is matched with an umbrella valve outer ring on the bottom surface of the engine oil cup and wraps the umbrella valve outer ring to form a seal under the action of the umbrella valve outer ring and the lower cylinder assembly, a gas inlet which is in fluid communication with the cavity is formed on the side wall of the cylindrical main body, the vacuum generator is connected with the gas inlet through a pipeline, the airtight detector is in fluid communication with the vacuum generator and is used for detecting the air flow transmitted by the vacuum generator, the upper cylinder assembly is arranged above the engine oil cup, a cavity is formed in the upper cylinder assembly, the cylinder assembly is arranged below the engine oil cup, the pressure is applied to the lower cylinder assembly, and the profile assembly is arranged below the cylinder assembly, and the cylinder assembly is sealed.

2. The umbrella valve airtight detection apparatus according to claim 1, wherein the support comprises a top plate, a bottom plate, and a column connecting the top plate and the bottom plate, a boss is provided above the top plate, an opening matching with a contour of the engine oil cup is formed in a middle portion of the boss, the engine oil cup is installed in the opening, and the lower cylinder assembly is provided on the bottom plate.

3. The umbrella valve airtightness detection apparatus according to claim 2, further comprising a frame including an upper frame and a lower frame, a platform being provided between the lower frame and the upper frame, the support being mounted on the platform, the upper cylinder assembly, the airtightness detector and the vacuum generator being mounted on the upper frame.

4. An umbrella valve airtight detection apparatus according to claim 3 further comprising an upper cylinder mount mounted on the platform and a stopper disposed on the upper cylinder mount for limiting when the upper cylinder moves down to a certain position to prevent the upper cylinder from continuing to move down to crush the engine oil cup.

5. The umbrella valve airtight detecting apparatus according to claim 4, wherein the upper cylinder assembly comprises an upper cylinder and a pressing head, a piston shaft of the upper cylinder is fixedly connected with the pressing head, and a shape of the pressing head is matched with an opening shape of the engine oil cup, so that the engine oil cup is pressed from top to bottom when the upper cylinder is operated.

6. The umbrella valve air tightness detection device of claim 1 wherein the lower cylinder assembly comprises a lower cylinder and a connector disposed between the lower cylinder and the profile and exerting an upward force on the profile when the lower cylinder is in operation, thereby sealing the profile against the bottom of the engine oil cup.

7. A method of detecting the sealing performance of an umbrella valve in an engine oil cup using the umbrella valve airtight detection apparatus of claim 5, the method comprising the steps of:

firstly, placing an engine oil cup with an opening upwards on a platform, and using an upper cylinder to drive a pressure head to press and fix the engine oil cup from top to bottom;