CN201293702Y

CN201293702Y - Leakage test equipment

Info

Publication number: CN201293702Y
Application number: CNU2008201663651U
Authority: CN
Inventors: 盛萌炎
Original assignee: NINGBO JOYSON AUTOMOTIVE COMPONENTS CO Ltd
Current assignee: NINGBO JOYSON AUTOMOTIVE COMPONENTS CO Ltd
Priority date: 2008-10-20
Filing date: 2008-10-20
Publication date: 2009-08-19
Anticipated expiration: 2018-10-20

Abstract

The utility model discloses a leakage tester, comprising an PLC for programmable control, inputting and outputting, which is characterized by further comprising an analog module, an indicator, a button, two pressure transformers, and a device for making gas at positive pressure or negative pressure, wherein one end of the analog module is connected with the PLC and the other end is connected with the pressure transformers; the air circuit of the device for making gas at positive or negative pressure is partly connected with the first pressure transformer and an electromagnetic valve; the other end of the electromagnetic valve is connected with the second pressure transformer and a product to be tested; the analog output ends of the first and the second pressure transformers are connected with the analog module. The leakage tester has the advantages of high detection accuracy and high detection speed.

Description

A kind of leak-testing equipment

Technical field

The utility model relates to a kind of testing apparatus, relates in particular to the testing apparatus whether a kind of testing product leaks, leaks gas.

Background technology

Before some kettle class, a jar series products dispatch from the factory, need to detect and whether leak, leak gas, current, for the impermeability of testing product, adopt water vat formula inflation checkout equipment to detect usually, exactly product to be measured is put into water, see and have or not bubble to emerge, thereby judge whether product is qualified, and the shortcoming of this checkout equipment is that accuracy of detection is low, and detection speed is slow, and the product airing will be caused time-delay to the bat printing operation before the bat printing, the production work efficiency is low.

The utility model content

The utility model provides a kind of precision height at the slow deficiency of detection speed in the prior art, and detection speed is fast, leak-testing equipment easy to detect.

In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals:

A kind of leak-testing equipment comprises PLC, is used for control able to programme and input and output, it is characterized in that, also comprises:

Analog module, analog module can read magnitude of voltage and magnitude of voltage can be converted to operand value and send PLC to,

Indicating device, indicating device can indicate distinguishing out qualified and underproof situation on the PLC,

Button starts operation with arrestment by button,

Pressure unit is exported different magnitudes of voltage when different air pressure,

Make gas produce malleation or means for applying negative, be used for the change of gaseous tension,

Wherein, the output terminal of described analog module links to each other with PLC, and input end links to each other with pressure unit,

The described air path part that makes gas produce malleation or means for applying negative is connected with pressure unit No. one, solenoid valve, the solenoid valve other end is connected with pressure unit No. two, product to be measured, and the analog quantity output terminal of a described pressure unit, No. two pressure units links to each other with analog module.

In the technique scheme, also be connected with man-machine interface on the described PCL, adopt man-machine interface can cooperate control also to show and operate with PLC.

In the technique scheme, also be connected with rain glass on the gas circuit, can observe the variation of air pressure intuitively.

In the technique scheme, described to make gas produce means for applying negative be vacuum pump.

In the technique scheme, the described device that makes gas produce malleation is an air compressor machine.

In the technique scheme, also be connected with gas-holder on the described vacuum pump, can cushion the variation of air pressure.

In the technique scheme, also be connected with on the described gas circuit and pack tightly cylinder, conveniently have the measurement of the above product to be measured in two gas outlets, in the measurement, other gas outlet is blocked, just can measure by packing tightly cylinder.

In the technique scheme, also be connected with pressure regulator valve on the described gas circuit, the convenient pressure of adjusting gas is heightened air pressure (comprising malleation and negative pressure) or turn down.

Beneficial effect: the utility model compared with prior art has following beneficial effect:

1) the utility model accuracy of detection height, and detection speed is fast;

2) adopt this leak-testing equipment to finish product to detect after, can carry out bat printing, saved the time, improved labour productivity;

3) because the utility model is provided with indicating device, can reflect the qualified and defective of product intuitively;

4) leak-testing equipment can conveniently move, and can test in each place in the workshop, and is very easy to use.

Description of drawings

Fig. 1 is the leak-testing equipment first example structure synoptic diagram

Fig. 2 is the leak-testing equipment second example structure synoptic diagram

Fig. 3 is leak-testing equipment the 3rd an example structure synoptic diagram

Wherein, dotted line is for being electrically connected circuit, and double solid line is the gas circuit connection line

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

See Fig. 1～Fig. 3:

Structural representation when wherein Fig. 1 is for the detection negative pressure;

Fig. 2 is the structural representation when detecting malleation;

The structural representation of Fig. 3 for not only can detect negative pressure but also can detect malleation the time.

Described leak-testing equipment mainly is made of PLC3, pressure unit, solenoid valve etc.

Described PLC3, it act as and utilizes PLC3 control able to programme and energy input and output.

Be connected with analog module 1 on the described PLC3, analog module 1 can read magnitude of voltage and magnitude of voltage can be converted to operand value and sends PLC3 to.

Also be connected with indicating device 6 on the described PLC3, indicating device 6 can the reactor product test result be qualified or defective, whether thereby it is qualified to judge product intuitively, easily, described indicating device 6 can be the LED lamp, hummer etc., not as limit, the utility model is set to the LED lamp.

Also be connected with button 5 on the described PLC3, start operation with arrestment by button 5.

Also be connected with on the described PLC3 and make gas produce malleation or means for applying negative, be used for variation of gas pressure, when the needs detection of negative pressure, making gas produce means for applying negative is vacuum pump 11, when needing malleation to detect, the described device that makes gas produce malleation is an air compressor machine 14.

The other end at analog module 1 is connected with pressure unit 2 No. one, and the effect of pressure unit is exportable different magnitudes of voltage when different air pressure, and sends value to analog module 1.

Preferably, also be connected with man-machine interface 4 on the described PCL, adopt man-machine interface 4 can cooperate control also to show and operate with PLC3.

The described air path part that makes gas produce malleation or means for applying negative is connected with pressure unit 2 No. one, solenoid valve 9, solenoid valve 9 other ends are connected with pressure unit 7 No. two, product 8 to be measured, a described pressure unit 2, No. two pressure units 7 link to each other with analog module 1, and described analog module 1 can read magnitude of voltage and magnitude of voltage can be converted to operand value and sends PLC3 to.

Preferably, in order to observe the variation of air pressure intuitively, also be connected with rain glass 12 on the gas circuit.

Preferably, in order to cushion the variation of air pressure, also be connected with gas-holder 10 on the vacuum pump 11.

Preferably, have the measurement of the above product to be measured 8 in two gas outlets for convenience, also be connected with on the described gas circuit and pack tightly cylinder 13, the effect that packs tightly cylinder 13 is that other gas outlet is blocked, and is convenient to measure.

Preferably, adjust the pressure of gas for convenience, air pressure (comprising malleation and negative pressure) is heightened or turned down, also be provided with pressure regulator valve on the described gas circuit.

Below its test philosophy being described in detail, is example with the detection of negative pressure:

1) test products 8 is installed on the sealing frock, and equipment has one road tracheae and frock to connect;

2) be arranged to detection of negative pressure on man-machine interface 4, PLC3 inside just obtains the detection of negative pressure signal, just exports one road electric signal to relay;

3) relay obtains electric signal meeting adhesive, and promptly the circuit of conducting vacuum pump 11 is just started working behind vacuum pump 11 circuit turn-ons, produces vacuum;

4) start button 5 under starts electric signal and passes to PLC3;

5) after the PLC3 input starts electric signal, export one road electric signal and give solenoid valve 9;

6) solenoid valve 9 obtains conducting gas circuit behind the electric signal, and promptly product 8 begins to produce negative pressure;

7) when the air pressure in the product 8 constantly changes, pressure unit is also constantly exported different magnitudes of voltage and is given analog module 1, and analog module 1 also constantly converts magnitude of voltage to numerical value, and constantly sends numerical value to PLC3;

8) man-machine interface 4 is set the test specification atmospheric pressure value and is stored PLC3 home address 1 into;

When 9) value of the numerical value that obtains from analog module 1 as PLC3 and home address 1 is the same, just stop to solenoid valve 9 output electric signal, solenoid valve 9 cuts out gas circuit;

10) after gas circuit was closed, the gas circuit in the product had also formed sealing state, and promptly atmospheric pressure value no longer changes, and the magnitude of voltage of pressure unit output simultaneously also no longer changes;

11) man-machine interface 4 is set a dwell time and is stored PLC3 home address 2 into;

12. man-machine interface 4 is set one and is allowed leakage value, and stores PLC3 home address 3 into;

12) PLC3 is when stopping to solenoid valve 9 output electric signal, and the value that reads analog module 1 input is as the benchmark atmospheric pressure value, and stores home address 4 into, picks up counting simultaneously;

13) PLC3 read the value (back is called fiducial value) that analog module 1 transmits in per 0.5 second in timing course, and compared with the value of home address 4;

14) when there is leakage in product 8, the decline that atmospheric pressure value should not stop, the variation that the magnitude of voltage of pressure unit output does not simultaneously also stop;

15) compare the atmospheric pressure value that draws with atmospheric pressure value relatively during more than or equal to the value of home address 3 when the benchmark atmospheric pressure value in timing course, PLC3 just exports defective electric signal and gives red led and warning lamp;

16) equal the value of home address 2 when PLC3 timing time value, and relatively atmospheric pressure value is compared the pressure reduction that draws less than the value of home address 3 with benchmark air pressure, PLC3 just exports qualified electric signal to green indicating lamp.

Though the utility model is described by preferred embodiment, yet the utility model is not limited to embodiment as described herein, also comprises various changes and the variation done under the situation that does not break away from the utility model scope.

Claims

1, a kind of leak-testing equipment comprises PLC (3), is used for control able to programme and input and output, it is characterized in that, also comprises:

Analog module (1), analog module (1) can read magnitude of voltage and magnitude of voltage can be converted to operand value and send PLC (3) to,

Indicating device (6), indicating device (6) can the reactor product test result be qualified or defective,

Button (5) starts operation with arrestment by button (5),

Pressure unit is exported different magnitudes of voltage when different air pressure, and shows the atmospheric pressure value of current production,

Make gas produce malleation or means for applying negative, be used for the change of gaseous tension, make it to be malleation or negative pressure,

Wherein, the output terminal of described analog module (1) links to each other with PLC (3), and input end links to each other with pressure unit,

The described air path part that makes gas produce malleation or means for applying negative is connected with a pressure unit (2), solenoid valve (9), solenoid valve (9) other end is connected with No. two pressure units (7), product to be measured (8), the analog quantity output terminal of a described pressure unit (2), No. two pressure units (7) links to each other with analog module (1).

2, leak-testing equipment as claimed in claim 1 is characterized in that, also is connected with man-machine interface (4) on the described PCL (3).

3, leak-testing equipment as claimed in claim 1 is characterized in that, also is connected with rain glass (12) on the described gas circuit.

4, leak-testing equipment as claimed in claim 1 is characterized in that, described to make gas produce means for applying negative be vacuum pump (11).

5, leak-testing equipment as claimed in claim 1 is characterized in that, the described device that makes gas produce malleation is air compressor machine (14).

6, leak-testing equipment as claimed in claim 4 is characterized in that, also is connected with gas-holder (10) on the described vacuum pump (11).

7, leak-testing equipment as claimed in claim 1 is characterized in that, also is connected with on the described gas circuit to pack tightly cylinder (13).

8, leak-testing equipment as claimed in claim 1 is characterized in that, also is connected with pressure regulator valve on the described gas circuit.