CN220063326U

CN220063326U - Tightness testing device

Info

Publication number: CN220063326U
Application number: CN202321433052.9U
Authority: CN
Inventors: 季久飞
Original assignee: ZF Automotive Systems Shanghai Co Ltd
Current assignee: ZF Automotive Systems Shanghai Co Ltd
Priority date: 2023-06-06
Filing date: 2023-06-06
Publication date: 2023-11-21
Anticipated expiration: 2033-06-06

Abstract

The utility model provides a tightness testing device, which is used for detecting the tightness of an object to be detected, wherein the object to be detected comprises a plurality of connecting passages, and at least one electromagnetic valve is arranged on each connecting passage, and the device comprises: the gas equipment is connected with the connecting passages of the object to be detected so as to introduce gas with preset pressure into each connecting passage; the testing equipment is connected with each connecting passage to collect the air pressure in each connecting passage; the fixing clamp is used for fixing the object to be detected; and the test coil is electrically connected with each electromagnetic valve so as to control the on and off states of the electromagnetic valves on each connecting path. According to the utility model, the object to be tested is stably fixed on the test bench through the fixing clamp, the stability during testing is increased, and then the leakage position on the object to be tested is rapidly positioned through adjusting the on-off state of the electromagnetic valve on the tested connecting passage, so that the labor is saved, and the detection efficiency of the tightness test is improved.

Description

Tightness testing device

Technical Field

The utility model relates to the technical field of detection, in particular to a tightness testing device.

Background

The integrated brake control (IBC, integrated Braking Control) module replaces the electronic stability control device (ESC, electronic Stability Controller) with an integrated unit, wherein the vacuum booster and the related cables, sensors, switches, electronic controllers and the like are integrated, and the integrated brake control system has the advantages of light weight, quick brake response, short brake distance and the like, and is a more advanced and complex brake control system. However, if IBC leaks, the automobile brake is disabled, and the driving safety is endangered.

Thus, there is a complex process equipment to detect IBC leaks before the product leaves the production line to detect if the product is satisfactory in terms of leaks. The existing leakage detection system can detect assembly leakage, but cannot accurately position a specific oil way of a product and leakage of components and parts, so that further analysis problems are difficult.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model aims to provide a tightness testing device which can quickly locate the position of a leakage point when the leakage point occurs to a detection object.

An embodiment of the present utility model provides a tightness testing device, configured to detect tightness of an object to be detected, where the object to be detected includes a plurality of connection paths, and each connection path is provided with at least one electromagnetic valve, and the tightness testing device is characterized in that the device includes: the gas equipment is connected with the connecting passages of the object to be detected so as to introduce gas with preset pressure into each connecting passage; the testing equipment is connected with each connecting passage to collect the air pressure in each connecting passage; the fixing clamp is used for fixing the object to be detected; and the test coil is electrically connected with each electromagnetic valve so as to control the on and off states of the electromagnetic valves on each connecting path.

During testing, firstly, a test coil controls the on and off states of the electromagnetic valve on the connecting passage to be tested, then, the gas with preset pressure is introduced into the connecting passage to be tested, the test equipment detects whether leakage exists in the connecting passage to be tested, and the on and off states of the electromagnetic valve on the connecting passage are adjusted again according to the leakage result of the test until the position of a leakage point is detected. The device provided by the utility model is convenient for quickly positioning the position of the leakage point in the pipeline, saves labor and improves the detection efficiency of the tightness test.

In some embodiments, a triple valve is also included in communication with the gas device. In these embodiments, the gas in the gas device may be filtered and depressurized through a triple valve to provide test gases at various pressures. And various test pressure gases are provided for the object to be tested, so that the object to be tested of various types can be tested for tightness.

In some embodiments, the object to be detected is an integrated brake control module, and the integrated brake control module comprises a hydraulic block and a brake master cylinder, wherein a brake cylinder hole is formed in the hydraulic block, and the hydraulic block is arranged in the brake cylinder hole.

In these embodiments, the location of leaks in complex connection paths in an integrated brake module may be detected.

In some embodiments, the fixture includes a first positioning block disposed on a test stand; the first positioning block is provided with a containing cavity for containing the brake master cylinder and a supporting part for supporting the first position of the hydraulic block.

In these embodiments, the IBC module is fixed to the test stand by the receiving chamber and the support portion to better fix the master cylinder and the hydraulic block.

In some embodiments, the fixture further comprises a second positioning block to support the second position of the hydraulic block.

In the embodiments, the second positioning block further provides support for the hydraulic block, so that the stability of the hydraulic block on the test bench is improved.

In some embodiments, a detection pin is further included by which the piston of the master cylinder is pushed to build pressure.

In these embodiments, the test pin simulates a brake lever such that the piston pushing the master cylinder builds pressure.

In some embodiments, an end of the detection pin near the main cylinder abuts on the piston, and an end of the detection pin far from the main cylinder abuts through a pressing block of the first clamp.

In the embodiments, one end of the detection pin, which is close to the main cylinder, is abutted on the piston, and one end of the detection pin, which is far away from the piston, is abutted through the pressing block of the first clamp, so that the position of the piston in the main cylinder is fixed.

In some embodiments, the fixture further comprises a gas test dowel to seal each fluid inlet of the hydraulic block.

In the embodiments, the gas test locating pin is firstly sealed with the fluid inlet on the hydraulic block, so that the tightness of the fluid inlet of the hydraulic block is ensured, the test gas is free from leakage at the fluid inlet of the hydraulic block, and the accuracy of a detection result is ensured.

In some embodiments, the gas test locating pin is further provided with a gas inlet hole, and the connecting pipe of the gas device is communicated with the fluid inlet of the hydraulic block through the gas inlet hole.

In these embodiments, gas from the gas device is introduced into each of the connection paths tested by the hydraulic block through the gas inlet holes to test the tightness in each of the connection paths.

In some embodiments, the gas test locating pin is further provided with a detection hole, and a detection tube of the test device is communicated with a fluid inlet of the hydraulic block through the detection hole.

In these embodiments, the detecting tube of the detecting device is connected to the tested connecting passage, so as to test the pressure variation condition in the tested connecting passage and determine whether a leakage point exists in the connecting passage.

The tightness testing device provided by the utility model has the following advantages:

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings.

FIG. 1 is a schematic view of a tightness testing device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a fixture according to an embodiment of the present utility model;

fig. 3 is an equivalent schematic diagram of an IBC module according to an embodiment of the present utility model.

Reference numerals:

10. 70 IBC module of gas equipment

20. First connection of test device 71

30. First solenoid valve of fixed clamp 711

31. First positioning block 72 second connection path

311. Accommodation chamber 721 second solenoid valve

312. Third connecting passage of support portion 73

32. Second positioning block 731 third electromagnetic valve

33. Fourth connection path of the detection pin 74

34. Fourth electromagnetic valve of gas test positioning pin 741

35. Fifth connecting passage of first clamp 75

36. Second clamp 751 fifth solenoid valve

40. Sixth connection path of test coil 76

50. Power 761 sixth electromagnetic valve

60. Triple valve

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted. "or", "or" in the specification may each mean "and" or ".

In the context of the present description, reference to the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples, as well as features of various embodiments or examples, presented herein may be combined and combined by those skilled in the art without conflict.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the context of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In order to solve the problems in the prior art, the utility model provides a tightness detection device which is used for detecting the tightness of an object to be detected, wherein the object to be detected comprises a plurality of connecting passages, and at least one electromagnetic valve is arranged on each connecting passage. As shown in fig. 1, the apparatus includes:

a gas device 10 connected to the connection paths of the object to be detected, so as to introduce a gas of a preset pressure into each of the connection paths; the gas device 10 may be a gas cylinder storing nitrogen or compressed air; the preset pressure is, for example, 10 ⁵ Pa～10 ⁷ Pa, but not limited to, a person skilled in the art can introduce reasonable gas with preset pressure according to actual requirements;

a test device 20 connected to each of the connection paths to collect the air pressure in each of the connection paths; the test equipment can be leak detection equipment such as a leak detector;

a fixing jig 30 for fixing the object to be detected;

and a test coil 40 electrically connected to each of the solenoid valves to control the on and off states of the solenoid valves on each of the connection paths. The test coil 40 is electrically connected to an external power supply 50, which provides a constant voltage and a variable current to the test coil, and the electromagnetic field generated by the test coil 40 can control the conduction and closing of different electromagnetic valves on the object to be tested, so as to control the conduction and closing of each connecting passage, and facilitate the detection of whether leakage occurs in different connecting passages.

During testing, an object to be tested is stably fixed on a test board through a fixing clamp, stability during testing is improved, then a test coil controls the on and off states of an electromagnetic valve on a connecting passage to be tested, then gas with preset pressure is introduced into the connecting passage to be tested, test equipment detects whether leakage exists in the connecting passage to be tested, and the on and off states of the electromagnetic valve on the connecting passage are adjusted again according to a leakage result of the test until the position of a leakage point is detected. The device provided by the utility model is convenient for quickly positioning the position of the leakage point in the pipeline, saves labor and improves the detection efficiency of the tightness test.

As shown in fig. 1, a triple valve 60 is further provided on the device and connected to the gas device 10. The gas in the gas fixture 10 can be filtered and depressurized through a triple valve 60 to provide test gases at various pressures. For example, when the gas device is supplied with compressed air of 7bar, and after the compressed air of 7bar enters the triple valve through the pipeline and is filtered and decompressed, test gas of 7bar or 1bar can be provided, and a tester selects one of the compressed air to make the compressed air enter the connecting passage of the object to be tested. The triple valve provides various test pressure gases for the object to be tested, and can meet the requirements of the object to be tested of various types for tightness test.

In this embodiment, the object to be detected is illustrated by taking an Integrated Brake Control (IBC) module as an example. The integrated brake control module comprises a hydraulic block and a brake master cylinder, wherein a brake cylinder hole is formed in the hydraulic block, and the hydraulic block is arranged in the brake cylinder hole.

The IBC module needs to be fixed on a fixture before the tightness test is performed. FIG. 2 shows a fixture for fixing an IBC module. As shown in fig. 2, the fixing jig 30 includes a first positioning block 31 disposed on a test bench, the first positioning block 31 being provided with a receiving cavity 311 receiving the brake master cylinder and a supporting portion 312 supporting a first position of the hydraulic block. The IBC module is fixed on the test bench by the holding cavity and the supporting part to better fix the master cylinder and the hydraulic block. Further, the fixture further includes a second positioning block 32 to support the second position of the hydraulic block. The second positioning block further provides support for the hydraulic block, so that the stability of the hydraulic block on the test bench is improved.

The fixture 30 further includes a detection pin 33 simulating an actuating lever such that the piston of the master cylinder is pushed by the detection pin 33 to build pressure. The end of the detection pin 30 near the main cylinder is abutted against the piston, and the end of the detection pin 33 far from the main cylinder is abutted against the pressing block of the first clamp 35, so that the position of the piston in the main cylinder is fixed.

Further, a gas test positioning pin 34 is further disposed on the fixing fixture 30, so as to seal each fluid inlet of the hydraulic block. The fixing clamp 30 in this embodiment is provided with 3 positioning pins 34, but not limited thereto. The gas test locating pin can be in butt joint sealing with the fluid inlet on the hydraulic block, so that the tightness of the fluid inlet of the hydraulic block is ensured, and the test gas is free from leakage at the fluid inlet of the hydraulic block during detection, so that the accuracy of a detection result is ensured.

Further, the gas test positioning pin 34 is further provided with a gas inlet hole, and the connecting pipe of the gas device is communicated with the fluid inlet of the hydraulic block through the gas inlet hole. In these embodiments, gas from the gas device is introduced into each of the connection paths tested by the hydraulic block through the gas inlet holes to perform a tightness test on each of the connection paths.

Further, the gas test positioning pin 34 is further provided with a detection hole, and a detection tube of the test device is communicated with a fluid inlet of the hydraulic block through the detection hole. The detection tube of the detection device is communicated with the tested connecting passage, so that the pressure change condition in the tested connecting passage can be tested, and whether a leakage point exists in the connecting passage is judged.

With continued reference to fig. 2, the gas test positioning pin 34 in this embodiment is mounted on a fixing plate, the fixing plate is fixedly connected with the pull rod of the second clamp 36, and the handle of the second clamp 36 is rotated to drive the gas test positioning pin 34 to move towards or away from the hydraulic block, so as to mount or dismount the gas test positioning pin 34 on or from the hydraulic block.

After the IBC is fixed by the fixing jig 30, the IBC module is subjected to tightness detection. Fig. 3 shows a partial schematic view of an IBC module 70 to detect the connection path shown in fig. 3 to explain the detection principle of the detection device provided by the present utility model. As shown in fig. 3, the two fluid inlets of the hydraulic block are respectively communicated with the first brake chamber and the second brake chamber of the master cylinder, and when the gas with preset pressure is introduced into the fluid inlets, the gas enters the connecting passages through the brake chambers. Here, the connection path includes a first connection path 71 and a second connection path 72, the first connection path 71 is provided with a first solenoid valve 711, and the second connection path is provided with a second solenoid valve 721. Further, the connection paths further include a third connection path 73, a fourth connection path 74, a fifth connection path 75, and a sixth connection path 76. Wherein, when the first solenoid valve 711 is in the on state, the third connection passage 73 and the fourth connection passage 74 are communicable with the first communicable passage 71; when the second solenoid valve 721 is in the on state, the fifth and sixth connection passages 75 and 76 may communicate with the second connection passage 72. Further, the third electromagnetic valve 731 is provided in the third connection path 73, the fourth electromagnetic valve 741 is provided in the fourth connection path 74, the fifth electromagnetic valve 751 is provided in the fifth connection path 75, and the sixth electromagnetic valve 761 is provided in the sixth connection path 76. When the third electromagnetic valve 731 is in the on state, the third connection passage 73 communicates with the first fluid outlet of the hydraulic block; when the fourth solenoid valve 741 is in the on state, the fourth connecting passage 74 communicates with the second fluid outlet of the hydraulic block; when the fifth solenoid valve 751 is in the on state, the fifth connecting passage 75 communicates with the third fluid outlet of the hydraulic block; when the sixth solenoid valve 761 is in the on state, the sixth connecting passage 76 communicates with the fourth fluid outlet of the hydraulic block.

When the test is carried out, all electromagnetic valves on the IBC module are closed, and then the air source pressure is adjusted to 7bar, and then the leakage test is started. When the test result shows that the current IBC module has leakage, the leakage test is firstly carried out on each connecting passage connected at the first brake cavity. And closing all electromagnetic valves on each connecting passage which can be communicated with the first brake cavity, and performing leakage test. If the detection result is still that there is a leak, it is obtained that the first solenoid valve 711 is leaking. If there is no leak as a result of the detection, the other solenoid valve is kept closed, and the first solenoid valve 711 is opened by the test coil to perform leak detection again. If the second leakage detection result is leakage, it can be obtained that the third electromagnetic valve 731 or the fourth electromagnetic valve 741 leaks, and the leakage detection test can be continuously performed according to the above method by replacing any electromagnetic valve. The electromagnetic valves on the other connecting paths are used for detecting leakage of all positions of the IBC module in the same way, so that the positions of the leakage points can be rapidly positioned, the labor is saved, and the detection efficiency is improved.

the object to be tested is stably fixed on the test bench through the fixing clamp, stability during testing is improved, then leakage testing is conducted on each connecting passage through adjusting the conducting and closing states of the electromagnetic valve on the tested connecting passage, the leakage position on the object to be tested can be rapidly located, labor is saved, and the detection efficiency of tightness testing is improved.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims

1. A tightness testing device for detecting tightness of an object to be detected, wherein the object to be detected comprises a plurality of connecting passages, and at least one electromagnetic valve is arranged on each connecting passage, and the device is characterized by comprising:

the gas equipment is connected with the connecting passages of the object to be detected so as to introduce gas with preset pressure into each connecting passage;

the testing equipment is connected with each connecting passage to collect the air pressure in each connecting passage;

the fixing clamp is used for fixing the object to be detected;

and the test coil is electrically connected with each electromagnetic valve so as to control the on and off states of the electromagnetic valves on each connecting path.

2. The tightness testing apparatus according to claim 1, further comprising a triple valve connected to said gas device.

3. The tightness testing device according to claim 1, wherein the object to be detected is an integrated brake control module, the integrated brake control module comprises a hydraulic block and a brake master cylinder, a brake cylinder hole is formed in the hydraulic block, and the hydraulic block is arranged in the brake cylinder hole.

4. The tightness testing device according to claim 3, wherein said fixing jig comprises a first positioning block placed on a test bench; the first positioning block is provided with a containing cavity for containing the brake master cylinder and a supporting part for supporting the first position of the hydraulic block.

5. The leak tightness testing apparatus of claim 4, wherein the stationary fixture further comprises a second positioning block to support the second position of the hydraulic block.

6. The tightness testing apparatus according to claim 3, further comprising a detection pin by which a piston of said master cylinder is pushed to build up pressure.

7. The tightness testing apparatus according to claim 6, wherein an end of the detection pin close to the master cylinder abuts against the piston, and an end of the detection pin far from the master cylinder abuts against the pressing block of the first clamp.

8. The tightness testing device of claim 7 wherein said fixture further comprises a gas test dowel to seal each fluid inlet of said hydraulic block.

9. The tightness testing device according to claim 8, wherein said gas testing positioning pin is further provided with a gas inlet hole, through which a connection pipe of said gas apparatus communicates with a fluid inlet of said hydraulic block.

10. The tightness testing device according to claim 9, wherein the gas test positioning pin is further provided with a detection hole, through which a detection tube of the testing apparatus communicates with a fluid inlet of the hydraulic block.