CN102620894B - Automatic leakage-detecting machine for sealed connecting terminal of compressor - Google Patents

Automatic leakage-detecting machine for sealed connecting terminal of compressor Download PDF

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Publication number
CN102620894B
CN102620894B CN201110362080.1A CN201110362080A CN102620894B CN 102620894 B CN102620894 B CN 102620894B CN 201110362080 A CN201110362080 A CN 201110362080A CN 102620894 B CN102620894 B CN 102620894B
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pressure
solenoid valve
detecting
counterdie
detection
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CN201110362080.1A
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CN102620894A (en
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薛喜华
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RIZHAO HUIFENG ELECTRONIC CO Ltd
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RIZHAO HUIFENG ELECTRONIC CO Ltd
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Abstract

An automatic leakage-detecting machine for a sealed connecting terminal of a compressor belongs to an automatic leakage-detecting machine for detecting the sealing performance of the sealed connecting terminal of the compressor. The automatic leakage-detecting machine for the sealed connecting terminal of the compressor comprises a machine frame (10) and a workpiece clamping device, a CCD (charge coupled device) detecting device, a PLC (programmable logic controller) control device (11) and a detecting medium containing device, wherein the workpiece clamping device comprises a lower mould table (2) and an upper mould table (3), which are provided with a lower mould (9) and an upper mould (8) respectively; the lower mould and the upper mould are combined with a workpiece (13) to form a sealed cavity; a gas outlet end of a high pressure gas supply device of the detecting medium containing device is connected to a lower mould position detecting cavity (12); a low pressure liquid supply device is a sealed loop formed by a pressurized air source, a pipeline, a detecting liquid container (16) and an upper mould position detecting cavity (14). The PLC controls the workpiece clamping device, the CCD detecting device and the detecting medium containing device, so that the automatic leakage-detecting machine for the sealed connecting terminal of the compressor has the advantages of accurate detection, high degree of automatism, and reduction of labor time and production cost.

Description

The automatic air leak tester of compressor seal connection terminal
Technical field
The present invention relates to a kind of product quality checkout equipment and device, particularly belong to a kind of automatic air leak tester compressor wiring terminal being carried out to sealing property detection.
Background technology
At present in Compressor Manufacturing field, means for detecting connection terminal sealing property mainly manually detect, its principle of work is in a stationary platform, manually detected terminal is put into detection cup, again with manually detection cup being screwed, open the air that hand valve passes into specific air pressure, filling detects liquid, then has bubble-free or liquid to ooze out with visual observation.Whether leak gas owing to detecting sealed connecting terminal with twenty-twenty vision micro-leakage situation is difficult to observe, the solid and larger uncertainty of existence.In addition, described specific air pressure is that manually solenoid valve is opened, and does not have equipment pressure holding function, and thus under specific air pressure, the pressurize testing requirement of a minute is difficult to the realization of stablizing, continuing.In a word, because whole testing process all needs manually to complete, efficiency is low, and labour intensity is large, and is difficult to obtain desirable Detection results.
Summary of the invention
Namely object of the present invention is to provide a kind of compressor seal connection terminal automatic air leak tester, by optimizing the version of leak-checking apparatus and taking stored program control system, reaches and improves characterization processes, improves the object of Detection results and detection efficiency.
The automatic air leak tester of compressor seal connection terminal provided by the present invention, comprises clamping workpiece device, CCD pick-up unit, PLC control device, detection medium draw off gear that frame and frame are installed; It is characterized in that, described clamping workpiece device comprises bed die platform and mold platform, and mold platform is fixedly mounted in frame, and the expansion link of bed die platform and pneumohydraulic pressure-cylinder connects, pneumohydraulic pressure-cylinder is connected to pressure source by elevating control solenoid valve, by elevating control solenoid control; Bed die platform with mold platform is respectively arranged with the corresponding counterdie of upper-lower position and patrix, counterdie is corresponding with the size and shape of workpiece with the size and shape of patrix, and triplicity forms closed chamber; Described CCD pick-up unit is made up of CCD detection head and mobile platform, and on a mobile platform, mobile platform is arranged on mold platform by slide mechanism and sliding rail the fixed installation of CCD detection head; Described detection medium draw off gear is made up of high-pressure air feed device and low pressure liquid feed device, and wherein, high-pressure air feed device comprises high-pressure solenoid valve and band gauge pressure switch, and inlet end connects high-pressure air source, and outlet side is connected to counterdie position test chamber; Low pressure liquid feed device is the airtight loop formed by pressure air source, pipeline, detection liquid container, patrix position test chamber, pipeline is provided with the solenoid valve controlling to detect the liquid flow direction; Described PLC control device comprises counterdie to bit detector, counterdie high pressure gas detection device, PLC central processing unit, and the solenoid valve that described counterdie flows to bit detector, counterdie high pressure gas detection device and above-mentioned elevating control solenoid valve, high-pressure solenoid valve, control detection liquid is connected with PLC central processing unit respectively.
The automatic air leak tester of compressor seal connection terminal provided by the present invention, its mode of leaking hunting is that gases at high pressure are added on connection terminal side, i.e. counterdie position test chamber side, then observe the opposite side detecting connection terminal, namely whether test chamber side in patrix position has bubble.First, connection terminal is put into the counterdie of clamping workpiece device, start pneumohydraulic pressure-cylinder and drive bed die platform to rise, counterdie and patrix are combined, forms airtight chamber with connection terminal wherein.Then, the high-pressure air feed device of start detection medium draw off gear and low pressure liquid feed device, gases at high pressure are delivered to counterdie position test chamber, detect after the atmospheric pressure value of gases at high pressure meets standard, detection liquid is added to patrix position test chamber, observe each connection terminal by CCD pick-up unit and whether have gas leakage, after completing, bed die platform is dropped to original position, complete the testing process of connection terminal.In process, the startup of the lifting of pneumohydraulic pressure-cylinder, the detection of gases at high pressure atmospheric pressure value, detection medium draw off gear, all realizes automatically controlling by PLC control device.
Due to the automatic air leak tester of compressor seal connection terminal disclosed in this invention, adopt CCD pick-up unit, the picture that connection terminal can be detected position amplifies 10 times, is transferred to picture screen and observes, and greatly increases accuracy, the validity of observing gas leakage.In addition, adopt clamping workpiece device to realize robotization by counterdie and the pneumatic closed of patrix, substantially increase efficiency.Participate in controlling clamping workpiece device, CCD pick-up unit, detecting medium draw off gear owing to have employed programmable controller PLC again, whole detection operation is carried out effectively.In sum, the present invention has the good effect that detection is accurate, automaticity is high, reduce work hours and save production cost.
Accompanying drawing explanation
Accompanying drawing part discloses specific embodiment of the utility model, wherein,
Fig. 1: general structure schematic diagram of the present invention;
Fig. 2: counterdie, patrix, location of workpiece relation schematic diagram;
Fig. 3: low-pressure pneumatic fundamental diagram of the present invention;
Fig. 4: high-pressure pneumatic fundamental diagram of the present invention;
Fig. 5: PLC control device workflow diagram.
Embodiment
As shown in Figure 1, the automatic air leak tester of compressor seal connection terminal provided by the present invention, its clamping workpiece device comprises bed die platform 2 and mold platform 3, and mold platform is fixedly mounted in frame 10, and the expansion link of bed die platform and pneumohydraulic pressure-cylinder 1 connects.Two rows totally 10 counterdies 9 and the patrix 8 that bed die platform is corresponding with mold platform being respectively arranged with upper-lower position.Obviously, counterdie should be corresponding with the size and shape of workpiece 13 with the size and shape of patrix, and as shown in Figure 2, triplicity can form closed chamber.
As shown in Figure 1, CCD pick-up unit of the present invention is made up of CCD detection head 5 and mobile platform 4.On a mobile platform, mobile platform is then arranged on mold platform 3 by slide mechanism 7 and sliding rail 6 fixed installation of CCD detection head.By CCD pick-up unit, product Nonlinear magnify 10 doubly can be passed on picture screen, whether have gas leak phenomenon to facilitate each sealed connecting terminal of observation.Wherein, CCD detection head can commercially be purchased, and the design of slide mechanism and sliding rail is also easily expect and realize with installing, therefore does not do too much explanation.
Detection medium draw off gear of the present invention is made up of high-pressure air feed device and low pressure liquid feed device.As shown in Figure 3, low pressure liquid feed device is the airtight loop formed by pressure air source, pipeline, detection liquid container 16, patrix position test chamber 14.Pressure air is accessed by main pressure regulator valve 21, the pipeline in formation loop is provided with the solenoid valve 30 controlling to detect the liquid flow direction, comprises the 3rd solenoid valve 18, the 4th solenoid valve 15 and the 5th solenoid valve 23.In addition, for adjustment pressure needs, return is also provided with No. two pressure regulator valves 17 and No. three pressure regulator valves 22.Wherein, the 3rd solenoid valve 18 is connected with No. two pressure regulator valves 17, and the 5th solenoid valve 23 is connected with No. three pressure regulator valves 22, and the 4th solenoid valve 15 is placed in and detects between liquid container 16 and patrix position test chamber 14.
The pressure source of pneumohydraulic pressure-cylinder 1 of the present invention can utilize the pressure air source of above-mentioned low pressure liquid feed device, pneumohydraulic pressure-cylinder is controlled by elevating control solenoid valve 28, in an embodiment as illustrated in figure 3, elevating control solenoid valve 28 refers to the second solenoid valve 19 and the first solenoid valve 20.
As shown in Figure 4, high-pressure air feed device comprises high-pressure solenoid valve 25 and band gauge pressure switch 24, and inlet end connects high-pressure air source, and outlet side is then connected to counterdie position test chamber 12.
Below operating pneumatic principle of the present invention is described further: pressure air, after main pressure regulator valve 21 is stable, starts the first solenoid valve 20 and the second solenoid valve 19, drives pneumohydraulic pressure-cylinder action to be locked by workpiece, start high-pressure solenoid valve 25, add high pressure gas in counterdie position test chamber 12, start the 3rd solenoid valve 18, pressure air enters and detects media Containers 16 after No. two pressure regulator valves 17 reduce pressure, start the 4th solenoid valve 15 simultaneously, the liquid detected in media Containers is pressed in patrix position test chamber 14, within 2 seconds, close the 3rd solenoid valve 18 afterwards, 4th solenoid valve 15, enter pressurize program, after examinations, let out except counterdie position test chamber 12 inner high voltage gas, start the 4th solenoid valve, 5th solenoid valve, pressure air enters in patrix test chamber after No. three pressure regulator valves 22 reduce pressure, detection media fluid is pushed back and detects in media Containers, namely the one-time detection cycle is completed.
As shown in Figure 5, PLC control device 11 of the present invention comprises counterdie to bit detector 26, counterdie high pressure gas detection device 29, PLC central processing unit 27.The solenoid valve 30 that counterdie flows to bit detector 26, counterdie high pressure gas detection device 29 and above-mentioned elevating control solenoid valve 28, high-pressure solenoid valve 25, control detection liquid is connected with PLC central processing unit respectively.
The all parts forming PLC control device of the present invention commercially all can be buied, and its connection, installation, using method also easily realize, and do not do too much explanation.Its principle of work is as follows:
When counterdie put in place detecting device and counterdie high pressure gas detection device signal detected time, enabling signal and detection atmospheric pressure value are passed to PLC central processing unit, whether detection atmospheric pressure value is sent to band gauge pressure switch testing and meets the requirements by PLC central processing unit, if when detection atmospheric pressure value reaches the standard value of setting, PLC central processing unit controls clamping workpiece device, CCD pick-up unit and detects medium draw off gear, complete the pressurize to workpiece, detection, release step, complete whole testing process; If when detection atmospheric pressure value does not reach the standard value of setting, PLC central processing unit controls clamping workpiece device and detects the release of medium draw off gear to get back to the front state of startup.

Claims (3)

1. the automatic air leak tester of compressor seal connection terminal, comprises clamping workpiece device, CCD pick-up unit, PLC control device (11), detection medium draw off gear that frame (10) and frame are installed; It is characterized in that, described clamping workpiece device comprises bed die platform (2) and mold platform (3), mold platform is fixedly mounted in frame, the expansion link of bed die platform and pneumohydraulic pressure-cylinder (1) connects, pneumohydraulic pressure-cylinder is connected to pressure source, by elevating control solenoid control by elevating control solenoid valve (28); Bed die platform with mold platform is respectively arranged with the corresponding counterdie of upper-lower position (9) and patrix (8), counterdie is corresponding with the size and shape of the same workpiece of the size and shape of patrix (13), and triplicity forms closed chamber; Described CCD pick-up unit is made up of CCD detection head (5) and mobile platform (4), on a mobile platform, mobile platform is arranged on mold platform by slide mechanism (7) and sliding rail (6) fixed installation of CCD detection head; Described detection medium draw off gear is made up of high-pressure air feed device and low pressure liquid feed device, wherein, high-pressure air feed device comprises high-pressure solenoid valve (25) and band gauge pressure switch (24), inlet end connects high-pressure air source, and outlet side is connected to counterdie position test chamber (12); Low pressure liquid feed device is the airtight loop formed by pressure air source, pipeline, detection liquid container (16), patrix position test chamber (14), pipeline is provided with the solenoid valve (30) controlling to detect the liquid flow direction; Described PLC control device comprises counterdie to bit detector (26), counterdie high pressure gas detection device (29), PLC central processing unit (27), and the solenoid valve that described counterdie flows to bit detector, counterdie high pressure gas detection device and above-mentioned elevating control solenoid valve, high-pressure solenoid valve, control detection liquid is connected with PLC central processing unit respectively.
2. the automatic air leak tester of compressor seal connection terminal according to claim 1, be further characterized in that, in described low pressure liquid feed device, pressure air source is by main pressure regulator valve (21) access, pipeline is provided with the solenoid valve controlling to detect the liquid flow direction, comprise the 3rd solenoid valve (18), with the 5th solenoid valve (23), pipeline is also provided with No. two pressure regulator valves (17) and No. three pressure regulator valves (22), wherein, 3rd solenoid valve (18) is connected with No. two pressure regulator valves (17), 5th solenoid valve (23) is connected with No. three pressure regulator valves (22), 4th solenoid valve (15) is placed in and detects between liquid container (16) and patrix position test chamber (14).
3. the automatic air leak tester of compressor seal connection terminal according to claim 2, be further characterized in that, the described pressure source of pneumohydraulic pressure-cylinder (1) and the pressure air source of low pressure liquid feed device, pneumohydraulic pressure-cylinder is by elevating control solenoid control, and described elevating control solenoid valve refers to the second solenoid valve (19) and the first solenoid valve (20).
CN201110362080.1A 2011-10-31 2011-10-31 Automatic leakage-detecting machine for sealed connecting terminal of compressor Active CN102620894B (en)

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Families Citing this family (6)

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Publication number Priority date Publication date Assignee Title
CN103234705B (en) * 2013-04-10 2015-10-21 江西英龙橡胶科技股份有限公司 A kind of rubber tube pressure seal tester
CN104949802B (en) * 2015-06-17 2017-12-29 安徽江淮松芝空调有限公司 Water tank air-tightness detection tool
CN105716804A (en) * 2016-02-23 2016-06-29 朱隆娅 Leakage test tool system using CCD visual system
CN106546391A (en) * 2016-10-28 2017-03-29 深圳市奋达科技股份有限公司 A kind of semi-finished product waterproof detection device and its waterproof detection method
CN111189591A (en) * 2020-01-02 2020-05-22 上海凯斯特民防设备有限公司 Airtight valve gas tightness detecting system
CN111307381A (en) * 2020-04-13 2020-06-19 马鞍山市奈特仪表科技有限公司 Pressure gauge sealing performance detection equipment and method

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CN202420780U (en) * 2011-10-31 2012-09-05 日照汇丰电子有限公司 Automatic leak tester for hermetic connecting terminal of compressor

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CN2789747Y (en) * 2005-05-27 2006-06-21 中国石化集团胜利石油管理局钻井工艺研究院 Underwell casing valve body testing device
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CN101561337A (en) * 2009-02-13 2009-10-21 上海增欣机电设备制造有限公司 Hydraulic valve test platform
CN202420780U (en) * 2011-10-31 2012-09-05 日照汇丰电子有限公司 Automatic leak tester for hermetic connecting terminal of compressor

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