CN214334166U

CN214334166U - Flexible leakage test tool

Info

Publication number: CN214334166U
Application number: CN202023269716.1U
Authority: CN
Inventors: 贾燕雨
Original assignee: Beijing Delphi Wanyuan Engine Management System Co ltd
Current assignee: Beijing Delphi Wanyuan Engine Management System Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-10-01
Anticipated expiration: 2030-12-30

Abstract

The utility model provides a flexible leak test frock, includes the fixed frock of vacuum pipe, the universal ball of vacuum and sealed vacuum apparatus, wherein, the first end hub connection sealed vacuum apparatus's of the universal ball of vacuum cylinder, the fixed frock of vacuum pipe of second end hub connection. And the vacuum universal ball is a hollow ball, and the vacuum cylinder, the vacuum universal ball and the vacuum pipeline fixing tool form a gas communication cavity. The utility model discloses can avoid the test result unstable to effectively overcome the problem that test instrument misjudged the test result, promote detection efficiency and reduce the human cost by a wide margin.

Description

Flexible leakage test tool

Technical Field

The utility model relates to a test fixture of automobile parts especially relates to test fixture of carbon tank solenoid valve.

Background

In the prior art, the tested electromagnetic valve is mostly an injection molding part, so that the tested electromagnetic valve has certain deformability. In the test engineering after the electromagnetic valve is assembled, after the electromagnetic valve is contacted with the test tool, because the electromagnetic valve injection molding part is deformed (such as inclined), contact force is generated between the electromagnetic valve and a sealing part of the test tool, and therefore a gap is generated between the sealing part of the test tool and the tested electromagnetic valve to cause air leakage. The same vacuum tube assembly process is easy to cause the contact force of the vacuum tube relative to the cylinder, so that a gap is generated between the cylinder and the vacuum tube to cause air leakage. The air leakage can cause unstable test results, so that the test instrument can misjudge the test results.

Therefore, a product is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flexible leak test frock can eliminate and avoid producing the contact force between the seal part of solenoid valve and test fixture and between cylinder and the vacuum tube to overcome test fixture's seal part and by producing the problem that the gap caused gas leakage between the test solenoid valve and between cylinder and the vacuum tube.

In order to achieve the above object, the utility model provides a flexible leak test frock, including the fixed frock of vacuum pipe, vacuum universal ball and sealed vacuum apparatus, wherein, the first end hub connection of vacuum universal ball seals vacuum apparatus's vacuum cylinder, and the fixed frock of vacuum pipe is held to the second end hub connection. And the vacuum universal ball is a hollow ball, and the vacuum cylinder, the vacuum universal ball and the vacuum pipeline fixing tool form a gas communication cavity.

As the preferred mode, the first end and the second end of the universal ball of vacuum all are provided with the sealing washer, and this sealing washer is used for sealing the gas intercommunication chamber and prevents that the cavity from taking place gas leakage.

As the preferred mode, flexible leak test frock still includes the spring connecting rod, and wherein, the third end of the universal ball of vacuum is perpendicular to be connected with the spring connecting rod. The spring connecting rod presses the vacuum universal ball to be fixed at a preset position, so that the vacuum cylinder and the vacuum pipeline fixing tool are tightly propped against the vacuum cylinder, and gas leakage of a cavity of the gas communication cavity is prevented.

As an optimal mode, the flexible leakage testing tool further comprises a workpiece fixing tool, a horizontal universal ball of the tool and an elastic mechanism, wherein the workpiece fixing tool comprises a workpiece leveling plate and a base. The workpiece leveling plate is provided with a leveling hole. The elastic mechanism passes through the leveling hole, the upper end of the elastic mechanism is connected with the instrument, the lower end of the elastic mechanism is connected with the base, and the angle of the instrument can be adjusted by the elastic mechanism. The base is connected with the workpiece leveling plate through a horizontal universal ball, wherein the horizontal universal ball can adjust the relative angle between the workpiece and the instrument on the workpiece leveling plate.

Preferably, the workpiece fixing tool comprises a workpiece fixing table, wherein the workpiece fixing table is arranged above the workpiece leveling plate.

Preferably, the workpiece fixing table is of a slidable structure and comprises a left sliding table and a right sliding table. The left sliding table and the right sliding table can be pulled close in a sliding mode to clamp a workpiece, and the workpiece can be moved out in a sliding pulling mode.

Preferably, the workpiece fixing tool further comprises a workpiece limiting groove, wherein a left sealing head and a right sealing head are arranged in the workpiece limiting groove, the workpiece limiting groove positions the workpiece so that the workpiece does not shake, and the left sealing head and the right sealing head seal the workpiece for testing.

Preferably, the elastic mechanism comprises a first elastic mechanism and a second elastic mechanism, wherein the upper end of the first elastic mechanism is connected with the floating electrical plug, and the lower end of the first elastic mechanism is connected with the base. The upper end of the second elastic mechanism is connected with a sealing vacuum device, and the lower end of the second elastic mechanism is connected with a base.

As the preferred mode, sealed vacuum apparatus still includes test fixing base, vacuum tube, switching pair silk and flow switch valve, and wherein, the test fixing base is provided with the cylinder installation cavity, is provided with the cylinder in this cylinder installation cavity, is provided with the vacuum tube in the cylinder, and switching pair silk and flow switch valve set up respectively in vacuum tube relevant position. The first end of vacuum tube is located the work piece fixed position, and the first end of universal ball of second end hub connection vacuum.

Preferably, the vacuum universal ball drives the vacuum tube to deflect, and the deflection range is not more than 2 mm.

Compared with the prior art, the utility model discloses a contact force can be eliminated and avoided producing between the seal part of solenoid valve and test fixture and between cylinder and the vacuum tube to overcome test fixture's seal part and by producing the problem that the gap caused gas leakage between the test solenoid valve and between cylinder and the vacuum tube. Therefore, the flexible sealing structure can avoid unstable test results, effectively solves the problem that test results are misjudged by a test instrument, greatly improves the detection efficiency and reduces the labor cost.

Compared with the prior art, the utility model discloses possess following improvement:

1. the air tightness is improved: after the flexible test tool is adopted, the test head can slightly move along with the deformation position of the workpiece, so that the test head tool always has good sealing with the workpiece, and the possibility of air leakage between the workpiece and the sealed test head is reduced; and the cylinder can slightly move along with the position of the deformed vacuum tube, so that the possibility of air leakage of the vacuum tube is reduced.

2. The stability and detection efficiency of the test are improved: the test result can be prevented from being unstable, so that the problem that the test result is misjudged by the test instrument is effectively solved, and the test stability and the test efficiency of the test instrument are improved.

3. Adopt flexible seal structure to require lowly and easily realize, application scope is wide to the gas tightness part than traditional sealing means: the sealing part of the traditional tool welding and other processes can not be used after being slightly deformed, and the flexible sealing structure can be used even if the sealing part is deformed, so that the application range is wide, the service life of the part is prolonged, the tool is simple in structure and easy to produce and maintain, and the design, production and maintenance cost of the tool can be effectively reduced.

4. The sealing and testing operations are simple: the workpiece does not need to be adjusted and positioned repeatedly, air leakage between the tool and the workpiece is detected, and operation convenience is improved.

Drawings

Fig. 1 is the principle schematic diagram of the flexible leakage test tool of the utility model.

Fig. 2 is a detailed schematic diagram of the structure of the flexible leakage testing tool of the present invention.

Fig. 3 is the utility model discloses a spatial structure sketch map of flexible leak test frock.

Detailed Description

Hereinafter, embodiments of the flexible leak test fixture of the present invention will be described with reference to the accompanying drawings.

The embodiments described herein are specific embodiments of the present invention, and are intended to be illustrative of the concepts of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the embodiments and the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which employ any obvious replacement or modification of the embodiments described herein.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of the respective portions and the mutual relationships thereof. It should be noted that the drawings are not necessarily drawn to the same scale in order to clearly illustrate the structures of the various components of the embodiments of the present invention. The same reference numerals are used to designate the same or similar parts. Further, when the description is made with reference to the drawings, directional words such as "upper", "lower", etc. are employed for convenience of description, and they do not constitute specific limitations on the structure of the features.

Example one

As shown in fig. 1, in this embodiment, the flexible leakage testing tool includes a vacuum pipe fixing tool 1, a vacuum universal ball 2 and a sealing vacuum device (3, 3 '), wherein a first end shaft of the vacuum universal ball 2 is connected to a vacuum cylinder 31 of the sealing vacuum device (3, 3'), and a second end shaft is connected to the vacuum pipe fixing tool 1. The vacuum universal ball 2 is a hollow ball, and the vacuum cylinder 31, the vacuum universal ball 2 and the vacuum pipeline fixing tool 1 form a gas communication cavity 4.

The utility model discloses in, the universal ball 2 in vacuum of connecting the cylinder is hollow, therefore gaseous can be from the universal ball 2 in-flow in vacuum of connecting the cylinder to flow out to test instrument.

Further, as shown in fig. 2, the first end and the second end of the vacuum universal ball 2 are provided with sealing rings (24 ', 24 "), and the sealing rings (24', 24") are used for sealing the gas communication cavity 4 to prevent gas leakage from the cavity.

The simple testing steps for flow testing by adopting the flexible structure tool are as follows:

1. the flow switch valve 35 is opened, the negative pressure of 50KPa is started to test whether the sealing surface of the test plug and the vacuum pipe 33 from the air inlet pipe is less than 30SCCM or not through the flow tester.

2. The workpiece 64 is entered into the cylinder and is placed in a test position, wherein the airtight test end of the workpiece 64 is required to abut against the vacuum tube 33 of the cylinder.

3. The vacuum cylinder 31 for plugging test is adopted, the vacuum tube 33 is clamped by the 2S inner sealing cylinder to be vacuumized at 50KP, the balance is 1.8S, the test is carried out for 0.5S, and the workpiece 64 is waited to move out to see whether the detection result of the test instrument is that the workpiece 64 is qualified or unqualified.

The present embodiment further preferably further includes a spring link 5, wherein the third end of the vacuum universal ball 2 is vertically connected to the spring link 5. The spring connecting rod 5 presses the vacuum universal ball 2 to be fixed at a preset position, so that the vacuum cylinder 31 and the vacuum pipeline fixing tool 1 are tightly propped against each other, and gas leakage of the cavity of the gas communication cavity 4 is prevented.

Specifically, the O-rings are clamped on two sides of the vacuum universal ball 2, so that a gap between the vacuum universal ball 2 and the vacuum cylinder 31 is sealed, and a gap between the vacuum universal ball 2 and the right vacuum pipeline fixing tool 1 is sealed. In addition, the spring props against a linkage piece, namely a spring connecting rod 5, and the spring connecting rod 5 drives the vacuum universal ball 2 to tightly press the right vacuum pipeline fixing tool 1.

The utility model discloses be different from traditional test instrument-the right side stiff end can not the displacement for the left vacuum seal pipe of vacuum cylinder 31 and vacuum cylinder 31 appear the crack and cause gaseous the revealing. The utility model discloses a flexible frock makes vacuum cylinder 31 about from top to bottom when squinting vacuum universal ball 2 squints equally, drives the cylinder skew when vacuum tube 33 squints to make between vacuum seal pipe and the cylinder not appear the crack, effectively improved the gas tightness of vacuum seal pipe and cylinder, effectively avoided vacuum seal pipe and cylinder to be difficult to totally sealedly, cause the problem that test equipment design, production, maintenance cost are high and the measuring accuracy is low.

Example two

Compared with the first embodiment, as shown in fig. 2 to 3, the difference of the second embodiment is that the flexible leakage testing tool further comprises a workpiece 64 fixing tool 6, a tool horizontal universal ball 7 and an elastic mechanism.

Specifically, the workpiece 64 fixing tool 6 comprises a workpiece 64 leveling plate 62 and a base 63. The workpiece 64 leveling plate 62 is provided with leveling holes 621. The elastic mechanism passes through the leveling hole 621, the upper end is connected with the instrument, and the lower end is connected with the base 63, wherein the elastic mechanism can adjust the angle of the instrument. The base 63 is connected to the workpiece 64 screed 62 by a horizontal gimballed shaft, wherein the horizontal gimballed shaft is capable of adjusting the relative angle between the workpiece 64 on the workpiece 64 screed 62 and the instrument.

After the horizontal universal ball is adopted, the test head can slightly move along with the deformation position of the workpiece 64, so that the test head tool always has good sealing with the workpiece 64, and the possibility of air leakage between the workpiece 64 and the sealed test head is reduced.

Further, the workpiece 64 fixing tool 6 comprises a workpiece 64 fixing table 622, wherein the workpiece 64 fixing table 622 is disposed above the leveling plate 62 of the workpiece 64.

More specifically, the workpiece 64 fixing table 622 is of a slidable structure, and includes a left slide table 6221 and a right slide table 6222. The left sliding table 6221 and the right sliding table 6222 can be slidably drawn close to clamp the workpiece 64, and can be slidably drawn far to move out of the workpiece 64. That is, the workpiece 64 is caught between the left slide table 6221 and the right slide table 6222 of the workpiece 64 fixing tool 6.

Further preferably, the workpiece 64 fixing tool 6 further includes a workpiece 64 limiting groove 61, wherein a left sealing head 36 and a right sealing head 37 are disposed in the workpiece 64 limiting groove 61, and the workpiece 64 is positioned by the workpiece 64 limiting groove 61 so as not to shake and the left sealing head 36 and the right sealing head 37 seal the workpiece 64 for testing.

The present embodiment further preferably comprises a first elastic means 8 'and a second elastic means 8 ", wherein the first elastic means 8' is connected to the floating electrical plug 9 at its upper end and to the base 63 at its lower end. The upper end of the second elastic mechanism 8 'is connected with the sealed vacuum device (3, 3'), and the lower end is connected with the base 63.

The present embodiment further preferably further includes a testing fixing base 32, a vacuum tube 33, a switching pair wire 34 and a flow switch valve 35, wherein the testing fixing base 32 is provided with a cylinder mounting cavity, a cylinder is disposed in the cylinder mounting cavity, the vacuum tube 33 is disposed in the cylinder, and the switching pair wire 34 and the flow switch valve 35 are respectively disposed at corresponding positions of the vacuum tube 33. The first end of the vacuum tube 33 is located at the fixed position of the workpiece 64, and the second end shaft is connected with the first end of the vacuum universal ball 2.

The present embodiment further preferably has the vacuum universal ball 2 driving the vacuum tube 33 to deflect, and the deflection range is not more than 2 mm.

The utility model discloses improved former technology assembly methods, improved into flexonics test fixture with fixed frock, the frock can be along with the slight removal of work piece 64, falls the frock to the minimum to the influence of work piece 64, has prevented because the injection molding warp, causes the unsafe problem of test result.

The detailed flow for flow test by adopting the flexible structure tool is as follows:

1. the operator places the workpiece 64 on the workpiece 64 fixture 66 and starts the test instrument.

2. The workpiece 64 holding table 622 carries the workpiece 64 to a testing position.

3. The left sliding table 6221 and the right sliding table 6222 move simultaneously toward the workpiece 64 to be measured at the center.

4. The left and right sealing heads 36, 37 of the vacuum apparatus (3, 3') are sealed while the workpiece 64 is locked.

5. And opening the flow switch valve 35, starting to pass through the flow tester at the negative pressure of-50 KPa, and if the flow is kept at 79-89L/min within 2 seconds, determining that the workpiece 64 is a qualified workpiece 64.

6. The left 36 and right 37 sealing heads simultaneously release the workpiece 64.

7. The left slide table 6221 and the right slide table 6222 are simultaneously moved away from the workpiece 64.

8. The workpiece 64 holding table 622 carries the workpiece 64 back to the loading position.

9. The operator removes the workpiece 64 from the workpiece 64 holding fixture 66.

More specifically, the testing step comprises:

an operator puts a workpiece 64 on the workpiece fixing tool 6, the vacuum cylinder 31 pulls the sliding table (the sliding table is the workpiece fixing table 622 can slide), the workpiece fixing table 622 moves a tested product to a testing position, the left sliding table 6221 moves rightwards, the sealing vacuum device 3 tightly clamps a workpiece guide pipe after the sliding table is in place, the right sliding table 6222 moves leftwards, the sealing vacuum device 3 tightly clamps the workpiece guide pipe after the sliding table is in place, if the workpiece 64 is deformed and compressed, the spring connecting rod and the adjusting screw (5 and 51) are turned, the workpiece 64 is flexibly positioned and sealed by the free floating effect generated through the adapter 15, the sealing ring 24 and the vacuum universal ball 2, and the testing negative pressure passes through the flow switch valve 35, the adapter pair wire 34, the testing fixing seat 32, the vacuum universal ball 2, the sealing ring 24, the adapter 15 and the sealing vacuum device 3 and then reaches a flow tester (not shown). After the workpiece 64 is tested to be qualified, the clamping sliding tables of the workpiece fixing arm 622, namely the left sliding table 6221 and the right sliding table 6222, are opened, the sliding tables return to the loading position, and the workpiece 64 is manually or automatically moved out.

The principle of the utility model is realized by an elastic piece-universal ball: in particular, a plurality of gimbaled balls may be provided. For example: frock is connected to frock horizontal universal ball 7, and the cylinder is connected to universal ball 2 in vacuum, and wherein, the universal ball 2 in vacuum of connecting the cylinder is hollow, and gaseous universal ball 2 in-flow outflow to test instrument in vacuum that can follow the connection cylinder.

Compared with the prior art, the utility model discloses a contact force can be eliminated and avoided between the seal part of solenoid valve and test fixture and between cylinder and the vacuum tube 33 to flexible seal structure to overcome test fixture's seal part and by producing the problem that the gap caused gas leakage between the test solenoid valve and between cylinder and the vacuum tube 33. Therefore, the flexible sealing structure can avoid unstable test results, effectively solves the problem that test results are misjudged by a test instrument, greatly improves the detection efficiency and reduces the labor cost.

1. the air tightness is improved: after the flexible test tool is adopted, the test head can slightly move along with the deformation position of the workpiece 64, so that the test head tool always has good sealing with the workpiece 64, and the possibility of air leakage between the workpiece 64 and the sealing test head is reduced; and the cylinder will move slightly with the position of the deformed vacuum tube 33, thereby reducing the possibility of air leakage from the vacuum tube 33.

4. The sealing and testing operations are simple: the workpiece 64 does not need to be adjusted and positioned repeatedly, and air leakage between the tool and the workpiece 64 is detected, so that the operation convenience is improved.

It is right above that the embodiment of the flexible leak test fixture of the present invention has been explained, and its purpose is to explain the spirit of the present invention. Note that those skilled in the art can modify and combine the features of the above-described embodiments without departing from the spirit of the present invention, and therefore, the present invention is not limited to the above-described embodiments. The specific features of the flexible leak test fixture of the present invention, such as shape, size and position, can be specifically designed by the action of the features disclosed above, all of which can be accomplished by one skilled in the art. Moreover, the technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the invention to achieve the aim of the invention.

Claims

1. A flexible leakage test tool is characterized by comprising a vacuum pipeline fixing tool, a vacuum universal ball and a sealing vacuum device, wherein,

the first end shaft of the vacuum universal ball is connected with a vacuum cylinder of the sealed vacuum device, and the second end shaft of the vacuum universal ball is connected with the vacuum pipeline fixing tool; and the number of the first and second electrodes,

the vacuum universal ball is a hollow ball, and the vacuum cylinder, the vacuum universal ball and the vacuum pipeline fixing tool form a gas communication cavity.

2. The flexible leak test tool according to claim 1,

the first end and the second end of the vacuum universal ball are both provided with sealing rings, and the sealing rings are used for sealing the gas communication cavity to prevent the gas leakage of the cavity.

3. The flexible leak test tool of claim 2, further comprising a spring link, wherein,

the third end of the vacuum universal ball is vertically connected with the spring connecting rod;

the spring connecting rod presses the vacuum universal ball to be fixed at a preset position, so that the vacuum cylinder and the vacuum pipeline fixing tool are tightly propped against the vacuum cylinder and the vacuum pipeline fixing tool, and gas leakage of a cavity of the gas communication cavity is prevented.

4. The flexible leakage test tool of claim 1, further comprising a workpiece fixture, a horizontal universal ball of the tool, and a spring mechanism, wherein,

the workpiece fixing tool comprises a workpiece leveling plate and a base;

the workpiece leveling plate is provided with a leveling hole;

the elastic mechanism penetrates through the leveling hole, the upper end of the elastic mechanism is connected with an instrument, and the lower end of the elastic mechanism is connected with the base, wherein the angle of the instrument can be adjusted by the elastic mechanism;

the base is connected with the workpiece leveling plate through the horizontal universal ball through a shaft, wherein the horizontal universal ball can adjust the relative angle between the workpiece and the instrument on the workpiece leveling plate.

5. The flexible leak test tool of claim 4, wherein the workpiece fixture includes a workpiece fixture table, wherein,

the workpiece fixing table is arranged above the workpiece leveling plate.

6. The flexible leak test tool according to claim 5,

the workpiece fixing table is of a slidable structure and comprises a left sliding table and a right sliding table;

the left sliding table and the right sliding table can be pulled close in a sliding mode to clamp a workpiece, and the workpiece can be moved out in a sliding pulling-away mode.

7. The flexible leakage testing tool of claim 6, wherein the workpiece fixture further comprises a workpiece limiting groove, wherein,

the workpiece limiting groove is internally provided with a left sealing head and a right sealing head, wherein the workpiece limiting groove positions the workpiece so that the workpiece does not shake, and the left sealing head and the right sealing head seal the workpiece for testing.

8. The flexible leak test tool according to claim 4,

the elastic mechanism comprises a first elastic mechanism and a second elastic mechanism, wherein,

the upper end of the first elastic mechanism is connected with a floating electric plug, and the lower end of the first elastic mechanism is connected with the base;

the upper end of the second elastic mechanism is connected with a sealing vacuum device, and the lower end of the second elastic mechanism is connected with the base.

9. The flexible leak test tool according to claim 8,

the sealed vacuum device also comprises a test fixing seat, a vacuum tube, a switching pair wire and a flow switch valve, wherein,

the test fixing seat is provided with a cylinder mounting cavity, the cylinder is arranged in the cylinder mounting cavity, the vacuum tube is arranged in the cylinder, and the switching pair wire and the flow switch valve are respectively arranged at corresponding positions of the vacuum tube;

the first end of the vacuum tube is located at the workpiece fixing position, and the second end shaft is connected with the first end of the vacuum universal ball.

10. The flexible leak test fixture of claim 9,

the vacuum universal ball drives the vacuum tube to deflect, and the deflection range is not more than 2 mm.