阅读说明：本技术 一种汽车零件气密性快速检测系统和方法 (System and method for rapidly detecting air tightness of automobile part ) 是由 吴随心 李伟君 吕宁 黄启涌 于 2019-11-20 设计创作，主要内容包括：本发明提供一种汽车零件气密性快速检测系统,包括气源输入区、测量区和接口输出区；所述的气源输入区包括气压机；所述的测量区包括调压阀、单向阀、压力表；接口输出区包括用于连接待测汽车零件的接头,其中气压机通过密封管道依次连接调压阀、单向阀、压力表,压力表输出端连接接口输出区的接头的一端,接头的另一端与所测汽车零件的内部空腔连通；其中所述接头为可与各类待测零件快速连接的快速接头。本发明提供的汽车零件气密性快速检测系统,结构简单,测量读数直接,泄漏量计算简单；且不需要拆卸汽车电车,仅需根据需要选择快速接头,工作量小,且不需要破坏现状,也可用于解析找到气密泄漏点。(The invention provides a quick detection system for the air tightness of automobile parts, which comprises an air source input area, a measurement area and an interface output area, wherein the air source input area is connected with the measurement area; the gas source input area comprises a gas compressor; the measuring area comprises a pressure regulating valve, a one-way valve and a pressure gauge; the interface output area comprises a joint for connecting the automobile part to be tested, wherein the air compressor is sequentially connected with a pressure regulating valve, a one-way valve and a pressure gauge through a sealing pipeline, the output end of the pressure gauge is connected with one end of the joint of the interface output area, and the other end of the joint is communicated with the inner cavity of the automobile part to be tested; the connector is a quick connector capable of being quickly connected with various parts to be tested. The automobile part air tightness rapid detection system provided by the invention has the advantages of simple structure, direct measurement and reading, and simple calculation of leakage amount; and the automobile trolley is not required to be disassembled, the quick connector is only required to be selected according to the requirement, the workload is low, the current situation is not required to be damaged, and the method can also be used for finding an airtight leakage point by analysis.)

1. A quick detection system for the air tightness of automobile parts is characterized by comprising an air source input area, a measurement area and an interface output area; the gas source input area comprises a gas compressor (1); the measuring area comprises a pressure regulating valve (2), a one-way valve (3) and a pressure gauge (4); the interface output area comprises a joint (5) used for connecting the automobile part to be tested, wherein the air compressor (1) is sequentially connected with the pressure regulating valve (2), the one-way valve (3) and the pressure gauge (4) through a sealing pipeline, the output end of the pressure gauge (4) is connected with one end of the joint (5) of the interface output area, and the other end of the joint (5) is communicated with the inner cavity of the automobile part to be tested; the connector (5) is a quick connector (5) capable of being quickly connected with various parts to be tested.

2. The system for rapidly detecting the airtightness of an automobile part according to claim 1, wherein the measuring region further comprises a manual opening and closing valve, the manual opening and closing valve is disposed between the pressure regulating valve (2) and the check valve (3), and the manual opening and closing valve is connected with the pressure regulating valve (2) and the check valve (3) through sealed pipelines.

3. The system for rapidly detecting the airtightness of the automobile parts according to claim 1, wherein the quick joint (5) comprises one or any combination of a two-way joint, a three-way joint, a four-way joint and a five-way joint of a pipeline.

4. A method for rapidly detecting the air tightness of automobile parts is applied to the system for rapidly detecting the air tightness of the automobile parts as claimed in any one of claims 1 to 3, and is characterized by comprising the following steps:

s1, connecting and debugging an air source input area and a measurement area;

s2, according to the part to be measured, selecting a corresponding quick connector (5) to be connected with the measuring area, and communicating the other end of the quick connector (5) with an internal cavity of the automobile part to be measured to complete the connection of the air source input area, the measuring area, the interface output area and the measuring part;

s3, opening the manual opening and closing valve, starting the air compressor (1), regulating the air pressure in the system through the pressure regulating valve (2), reading the reading of the pressure gauge (4), and confirming whether the air tightness of the part meets the requirement;

and S4, after determining whether the air tightness of the part meets the requirement, analyzing the air tightness leakage point of the part of which the air tightness does not meet the requirement.

5. The method for rapidly detecting the airtightness of the automobile part according to claim 4, wherein the specific steps of S1 are as follows:

s11, connecting the input end of the measurement area with the output end of the air source input area through a sealed pipeline;

s12, adjusting the pressure regulating valve (2) to the maximum range, closing the manual opening and closing valve, and observing the pressure gauge (4) to confirm the airtightness of each interface and each valve.

6. The method for rapidly detecting the airtightness of the automobile part according to claim 4, wherein the specific steps of S3 are as follows:

s31, opening a manual opening and closing valve and starting the air compressor (1);

s32, setting the checking air pressure to be xkpa according to the air tightness checking reference of the part to be detected, and adjusting the reading of the pressure regulating valve (2) and the pressure gauge (4) to be stabilized at xkpa;

s33, closing the manual opening and closing valve, keeping the pressure for m seconds, and reading the reading ykpa, m of the pressure gauge (4) again>0，

7. The method for rapidly detecting the airtightness of the automobile part according to claim 4, wherein the specific steps of S4 are as follows:

and placing the part with the air tightness performance which does not meet the requirement in a water tank, opening a manual opening and closing valve, observing bubbles generated by the part, and determining the air tightness leakage point of the part.

8. The method for rapidly detecting the air tightness of the automobile parts according to claim 4, wherein in step S2, if the air tightness of a batch of parts to be measured is required, one or any combination of the two-way pipe joint (5), the three-way pipe joint (5) or the five-way pipe joint (5) is selected according to requirements, and is connected to a plurality of rapid joints (5), and a plurality of parts are measured at the same time to determine whether the air tightness of the parts meets the requirements.

9. The method for rapidly detecting the airtightness of automobile parts according to claim 5, wherein the maximum range of the pressure regulating valve (2) is 0.2 MPa.

10. The method for rapidly detecting the airtightness of the automobile part according to claim 6, wherein the dwell time m is in a range of 20 to 40 seconds.

Technical Field

The invention relates to the field of airtightness detection, in particular to a system and a method for quickly detecting airtightness of an automobile part.

Background

The method comprises the following specific steps that ① preliminarily judges which automobile electrical appliance is bad according to fault codes and locks specific automobile electrical appliances through interchange tests (partial bad such as large lamp fogging or water feeding can be distinguished by naked eyes), ② detaches the automobile electrical appliances and sends the automobile electrical appliances to a supplier for air tightness test (if necessary, a third-party professional testing mechanism needs to be found for carrying out water spraying or water immersion test to confirm whether the products meet the designed sealing requirements or not), ④ finally carries out power-on test for simulating the working environment of the automobile and finally carries out water disassembly test to confirm whether the internal of the electrical appliances has the relevant sealing traces or not (⑤) and finally tests for detecting the sealing traces and the sealing bad results according to national standards and the corrosion results of the electric appliances.

In the above method, in the process, the electric appliance needs to be rolled to 4 places (the site of a bad vehicle, the production line of a supplier, a third-party professional institution and an electric appliance disassembly analysis laboratory), and the sealing test cost of the third-party professional institution which can be completed in at least 1 week and is expensive is considered; in the whole analysis process, the main disadvantages are as follows: the current situation that the electric appliance is poor in the disassembling process is damaged (such as the electric appliance enters cooling liquid), further analysis cannot be conducted, the state that the electric appliance product is in a fault state after water enters due to poor sealing performance is unstable for a certain time, the electric appliance product is poor, the electric appliance product cannot reappear, online detection of a production line and a professional organization often only ignore sealing detection serving as a system on an automobile aiming at a single electric appliance product during sealing test, and therefore a true cause cannot be found.

Based on the reasons, the simple, economical and convenient automobile electrical appliance sealing detection tool is designed and manufactured, under the assistance of the detection tool, the sealing detection of an automobile electrical appliance single product or a whole automobile system can be completed within 10 minutes by 1 person holding the measurement tool, so that the bad reasons can be rapidly checked, and the equipment can meet the requirement of batch (4 or more) detection of the sealing of parts, so that the analysis and confirmation efficiency is improved.

Disclosure of Invention

The invention provides a rapid detection system for the air tightness of automobile parts, aiming at the problems that the current situation of poor electric appliances caused in the disassembly process of air tightness detection in the prior art is damaged (such as cooling liquid is fed), further analysis cannot be performed, the state of faults of electric products caused by poor tightness after water is fed is unstable for a certain time and cannot be reproduced, online detection of a production line and sealing detection of a professional organization serving as a system on an automobile can only be ignored aiming at single automobile electric appliances during sealing test, and the true cause cannot be found.

A quick detection system for the air tightness of automobile parts comprises an air source input area, a measurement area and an interface output area; the gas source input area comprises a gas compressor; the measuring area comprises a pressure regulating valve, a one-way valve and a pressure gauge; the interface output area comprises a joint for connecting the automobile part to be tested, wherein the air compressor is sequentially connected with a pressure regulating valve, a one-way valve and a pressure gauge through a sealing pipeline, the output end of the pressure gauge is connected with one end of the joint of the interface output area, and the other end of the joint is communicated with the inner cavity of the automobile part to be tested; the connector is a quick connector capable of being quickly connected with various parts to be tested.

In a preferred embodiment, the measuring region further includes a manual opening and closing valve, the manual opening and closing valve is disposed between the pressure regulating valve and the check valve, and the manual opening and closing valve, the pressure regulating valve and the check valve are connected through a sealed pipeline.

In a preferable scheme, the quick joint comprises one or any combination of a pipeline two-way joint, a pipeline three-way joint, a pipeline four-way joint and a pipeline five-way joint.

The second aspect of the invention provides a method for rapidly detecting the air tightness of an automobile part, which is applied to the system for rapidly detecting the air tightness of the automobile part and comprises the following steps:

s1, connecting and debugging an air source input area and a measurement area;

s2, according to the part to be measured, selecting a corresponding quick connector to be connected with the measuring area, and communicating the other end of the connector with the inner cavity of the measured automobile part to complete the connection of the air source input area, the measuring area, the interface output area and the measuring part;

s3, opening the manual opening and closing valve, starting the air compressor, regulating the air pressure in the system through the pressure regulating valve, reading the reading of the pressure gauge, and determining whether the air tightness of the part meets the requirement;

and S4, after determining whether the air tightness of the part meets the requirement, analyzing the air tightness leakage point of the part of which the air tightness does not meet the requirement.

In a preferred embodiment, the specific steps of S1 are as follows:

s11, connecting the input end of the measurement area with the output end of the air source input area through a sealed pipeline;

s12, adjusting the pressure regulating valve to the maximum range, closing the manual opening and closing valve, and observing the pressure gauge to confirm the airtightness of each interface and each valve.

In a preferred embodiment, the specific steps of S3 are as follows:

s31, opening a manual opening and closing valve and starting a pneumatic press;

s32, setting the checking air pressure to be xkpa according to the air tightness checking reference of the part to be detected, and adjusting the reading of a pressure regulating valve and a pressure gauge to be stabilized at xkpa;

s33, closing the manual opening and closing valve, keeping the pressure for m seconds, and reading the reading ykpa, m of the pressure gauge again>0, press

And comparing the calculated value with an air tightness inspection standard, and judging whether the air tightness performance of the part meets the requirement or not.

In a preferred embodiment, the specific steps of S4 are as follows:

and placing the part with the air tightness performance which does not meet the requirement in a water tank, opening a manual opening and closing valve, observing bubbles generated by the part, and determining the air tightness leakage point of the part.

In a preferred embodiment, in step S2, if the airtightness of a batch of parts to be measured is required, a two-way joint, a three-way joint or a five-way joint of a pipeline is selected according to the requirement, a plurality of quick joints are connected, and a plurality of parts are measured at the same time to determine whether the airtightness of the parts meets the requirement.

In a preferable scheme, the maximum range of the pressure regulating valve is 0.2 Mpa.

In a preferable scheme, the value of the dwell time m ranges from 20 seconds to 40 seconds.

Compared with the prior art, the technical scheme of the invention has the beneficial effects that:

the automobile part air tightness rapid detection system provided by the invention has the advantages of simple structure, direct measurement and reading, and simple calculation of leakage amount; and the automobile trolley is not required to be disassembled, the quick connector is only required to be selected according to the requirement, the workload is low, the current situation is not required to be damaged, and the method can also be used for finding an airtight leakage point by analysis.

Drawings

FIG. 1 is a schematic structural diagram of a system for rapidly detecting the air tightness of an automobile part provided by the invention;

FIG. 2 is a schematic flow chart of the method for rapidly detecting the air tightness of the automobile part provided by the invention;

FIG. 3 is a schematic diagram of the system for rapidly detecting the airtightness of the automobile part provided by the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and are used for illustration only, and should not be construed as limiting the patent. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.