CN101271034B - Gas meter leak tightness detecting method and device thereof - Google Patents

Gas meter leak tightness detecting method and device thereof Download PDF

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Publication number
CN101271034B
CN101271034B CN2008100599101A CN200810059910A CN101271034B CN 101271034 B CN101271034 B CN 101271034B CN 2008100599101 A CN2008100599101 A CN 2008100599101A CN 200810059910 A CN200810059910 A CN 200810059910A CN 101271034 B CN101271034 B CN 101271034B
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CN
China
Prior art keywords
gas meter
cover plate
airtight container
leak tightness
flow
Prior art date
Application number
CN2008100599101A
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Chinese (zh)
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CN101271034A (en
Inventor
汤有成
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海盐美捷测试仪器有限公司
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Priority to CN2008100599101A priority Critical patent/CN101271034B/en
Publication of CN101271034A publication Critical patent/CN101271034A/en
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Publication of CN101271034B publication Critical patent/CN101271034B/en

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Abstract

The invention discloses a gas meter sealing detecting method and a detector thereof. The detector includes a sealed container, a cylinder, a cover plate, a block water sealing mechanism, an air flow guide pipe and an air flow detection opening; during detection, a gas meter to be detected is put into the sealed container; the orifice of the gas meter to be detected is sealed and connected with the air flow detection opening arranged out of the sealed container; and then the sealed container is sealed and pumped vacuum; finally the air flow detection opening observes the pressure changes in the meter, compares with a standard meter and judges the sealing. The invention puts the detected meter into the vacuum sealed container with certain pressure, manufactures a relatively vacuum environment out of the gas meter to be detected to observe the pressure changes in the gas meter, so as to judge the leakage of the detected meter. The invention makes use of the temperature transmission between the vacuum isolated detected meter and the outside environment, so as to reduce the influence of the temperature on the pressure with small temperature influence and high detecting precision, and the quality of the gas meter is not influenced by the detection.

Description

A kind of gas meter leak tightness detection method and pick-up unit thereof

Technical field

The present invention relates to a kind of instrument method for conducting leak test and pick-up unit thereof, specifically a kind of gas meter leak tightness detection method and device thereof.

Background technology

At present, gas meter leak tightness detects two kinds of methods: a kind of is that wet type detects, and just gas meter, flow meter is immersed in the water and detects, and the shortcoming of this detection method is: in testing process, water influences the quality of gas meter, flow meter possibly.Another kind is that dry type detects, and is the pressurized air that charges into certain pressure in tested table, observes tested table internal pressure by tensimeter then and changes, thereby judge the degree that tested table leaks.The shortcoming of this detection method is that temperature influence is bigger, easily erroneous judgement.

Summary of the invention

Technical matters to be solved by this invention is to propose that a kind of detection accuracy is good, the gas meter, flow meter quality can examined influence gas meter leak tightness detection method and pick-up unit thereof.

For solving the problems of the technologies described above, a kind of gas meter leak tightness detection method of the present invention places gas meter, flow meter to be checked in the airtight container when detecting; The mouth of pipe of gas meter, flow meter to be checked is airtight, and detect by the conduit air-flow that the mouth of pipe is outer with being located at airtight container and mouthful to link to each other, thereby the interior air pressure of gas meter, flow meter to be checked is drawn; Then that airtight container is airtight and be evacuated; Detect by air-flow at last and mouthful observe a table internal pressure and change, and with standard scale to recently judging its sealing.

Adopt the gas meter leak tightness pick-up unit of above-mentioned detection method to comprise that airtight container, cylinder, cover plate, pocket watch sealing mechanism, airflow duct and air-flow detect mouth, described cylinder is located at the top of described airtight container, described cover plate links to each other with the piston rod of described cylinder, described pocket watch sealing mechanism is fixedly connected on the below of described cover plate, described pocket watch sealing mechanism detects mouth by described airflow duct and described air-flow and links to each other, described airtight container is provided with opening and bleeding point, described cover plate is corresponding with described opening upper-lower position, and both are tightly connected during work.

Above-mentioned gas meter leak tightness pick-up unit, it also includes pull bar, and the bottom of described each pull bar is connected the both sides of each opening on the described airtight container, and the both sides of described each cover plate link to each other with described adjacent two pull bars respectively.

Above-mentioned gas meter leak tightness pick-up unit, the both sides of described each cover plate are respectively by countervane and described pull bar location.

Above-mentioned gas meter leak tightness pick-up unit, the opening part of described airtight container is provided with the flange circle, and described flange circle is provided with O-ring seals.

Above-mentioned gas meter leak tightness pick-up unit, described air-flow detects the upside that mouth is located at described cover plate.

Above-mentioned gas meter leak tightness pick-up unit, described pocket watch sealing mechanism comprises pocket watch plate, little cylinder, connector, cross bar and resilient seal head, the upper/lower terminal of described little cylinder links to each other with connector with described cover plate respectively, described connector links to each other with described cross bar simultaneously, and described resilient seal head is connected the two ends of described cross bar.

Because the inventive method is not inflated in tested table when detecting, but tested table is put into the vacuum-tight container of certain pressure, observe air pressure change in the gas meter, flow meter at the outside environment of making a relative vacuum of gas meter, flow meter to be checked, judge the leakiness of tested table by observing pressure difference value between tested table and the standard scale.It utilizes vacuum insulating table to be checked and extraneous temperature transfer, thereby has reduced the influence of temperature for pressure, and temperature influence is less, and accuracy of detection is higher, and the gas meter, flow meter quality can examinedly not influence yet.When operative installations detects, cylinder and airtight container are fixed in the detection stand, on table to be checked inserted pocket watch sealing mechanism under the cover plate from opening part, simultaneously pocket watch sealing mechanism (resilient seal head) down means of press seals two mouths of pipe of table to be checked, the air cylinder driven gland bonnet descends during detection, be close to the opening on the airtight container is airtight,, the air pressure in the gas meter, flow meter drawn by the through hole in the pocket watch sealing mechanism (resilient seal head).Bleed in airtight container then, the gas outlet observation table internal pressure of drawing by gas meter, flow meter changes, and with other tested table to recently judging its sealing.During detection, the upper end of pull bar can be fixed on and detect in the stand, like this, not only can strengthen the steadiness of airtight container, also be convenient to cover plate and move up and down.Countervane can be so that the location of cover plate when moving up and down do not make its double swerve or rotation skew.The flange circle of band O-ring seals can guarantee being tightly connected between itself and cover plate.Air-flow detects the upside that mouth is located at cover plate, can be convenient to detecting operation.

Description of drawings

Fig. 1 is the structural representation of pick-up unit of the present invention;

Fig. 2 is that the Zoom Side of Fig. 1 cover plate and pocket watch sealing mechanism is to structural representation;

Fig. 3 is the side direction structural representation with respect to Fig. 2.

Embodiment

As shown in Figure 1, the gas meter leak tightness pick-up unit comprises that barrel-shaped airtight container 11, cylinder 1, pull bar 2, cover plate 5, pocket watch sealing mechanism, airflow duct 8 and air-flow detect mouth 6, the top of barrel-shaped airtight container 11 is provided with three openings (number of openings can be offered by quantity that once need the inspection table), each opening part weldering is provided with flange circle 10, and flange circle 10 is provided with O-ring seals 9.The lower end of airtight container 11 is provided with bleeding point 12.Cylinder 1 is located at the top of each opening, and cover plate 5 links to each other with the piston rod of cylinder 1 by connector 4, and cover plate 5 is corresponding with the opening upper-lower position of airtight container 11, and air-flow detects the upside that mouth 6 is located at cover plate 5.The bottom of pull bar 2 is connected the both sides of each opening on the airtight container 12, and the upper end of pull bar 2 is connected to be detected on the stand 3.The both sides of each cover plate 5 link to each other with adjacent two pull bars 2 by countervane 7 respectively, and by its location.

As shown in Figures 2 and 3, the pocket watch sealing mechanism comprises pocket watch plate 14, stingy cylinder 15, connector 16, cross bar 17 and resilient seal head 19, the upper/lower terminal of stingy cylinder 15 links to each other with connector 16 with the lower end of cover plate 5 respectively, connector 16 links to each other with cross bar 17 simultaneously, and two resilient seal heads 19 are connected the two ends of cross bar 17 by bearing pin 18.Be provided with air hole in the middle of the resilient seal head 19, detect mouth 6 by airflow duct 8 and air-flow and link to each other.Two airtight linking to each other of the mouth of pipe of resilient seal head 19 and gas meter, flow meter 13 to be checked, like this, air hole that table 13 to be checked just can be by resilient seal head 19 and airflow duct 8 and air-flow detect mouthfuls 6 and link to each other.

During use, cylinder 1 and airtight container 11 be fixed on detect in the stand 3, gas meter, flow meter 13 to be checked is inserted pocket watch sealing mechanism under the cover plate 5 from opening part, resilient seal head 19 is depressed sealed two mouths of pipe of gas meter, flow meter 13 to be checked by stingy cylinder 15 work.During detection, cylinder 1 drives cover plate 5 and descends, and is close to the opening on the airtight container 11 is airtight, and gas meter, flow meter 13 to be checked is drawn the air pressures in the gas meter, flow meter 13 to be checked by the through hole of resilient seal head interior 19.In airtight container 11, bleed then, detect mouthful 6 pressure of observing in the gas meter, flow meter 13 to be checked by air-flow and change, and with other tested table to recently judging its sealing.

Claims (7)

1. a gas meter leak tightness detection method is characterized in that, during detection, gas meter, flow meter to be checked is placed in the airtight container; The mouth of pipe of gas meter, flow meter to be checked is airtight, and detect by the conduit air-flow that the mouth of pipe is outer with being located at airtight container and mouthful to link to each other, thereby the interior air pressure of gas meter, flow meter to be checked is drawn; Then that airtight container is airtight and be evacuated; Detect by air-flow at last and mouthful observe a table internal pressure and change, and with standard scale to recently judging its sealing.
2. adopt the gas meter leak tightness pick-up unit of the described detection method of claim 1, it is characterized in that, it comprises airtight container, cylinder, cover plate, the pocket watch sealing mechanism, airflow duct and air-flow detect mouth, described cylinder is located at the top of described airtight container, described cover plate links to each other with the piston rod of described cylinder, described pocket watch sealing mechanism is fixedly connected on the below of described cover plate, described pocket watch sealing mechanism detects mouth by described airflow duct and described air-flow and links to each other, described airtight container is provided with opening and bleeding point, described cover plate is corresponding with described opening upper-lower position, and both are tightly connected during work.
3. gas meter leak tightness pick-up unit as claimed in claim 2, it is characterized in that, it also includes pull bar, the quantity of described opening, cover plate and pull bar is offered by quantity that once need the inspection table, the bottom of described each pull bar is connected the both sides of each opening on the described airtight container, and the both sides of described each cover plate link to each other with described adjacent two pull bars respectively.
4. gas meter leak tightness pick-up unit as claimed in claim 3 is characterized in that, the both sides of described each cover plate are respectively by countervane and described pull bar location.
5. as claim 2,3 or 4 described gas meter leak tightness pick-up units, it is characterized in that the opening part of described airtight container is provided with the flange circle, described flange circle is provided with O-ring seals.
6. as claim 2,3 or 4 described gas meter leak tightness pick-up units, it is characterized in that described air-flow detects the upside that mouth is located at described cover plate.
7. as claim 2,3 or 4 described gas meter leak tightness pick-up units, it is characterized in that, described pocket watch sealing mechanism comprises pocket watch plate, little cylinder, connector, cross bar and resilient seal head, the upper/lower terminal of described little cylinder links to each other with connector with described cover plate respectively, described connector links to each other with described cross bar simultaneously, and described resilient seal head is connected the two ends of described cross bar.
CN2008100599101A 2008-03-04 2008-03-04 Gas meter leak tightness detecting method and device thereof CN101271034B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008100599101A CN101271034B (en) 2008-03-04 2008-03-04 Gas meter leak tightness detecting method and device thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2008100599101A CN101271034B (en) 2008-03-04 2008-03-04 Gas meter leak tightness detecting method and device thereof

Publications (2)

Publication Number Publication Date
CN101271034A CN101271034A (en) 2008-09-24
CN101271034B true CN101271034B (en) 2011-08-10

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Application Number Title Priority Date Filing Date
CN2008100599101A CN101271034B (en) 2008-03-04 2008-03-04 Gas meter leak tightness detecting method and device thereof

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101788374B (en) * 2010-02-02 2011-05-25 浙江大学 Device for detecting leaking performance of gas meter motor valve
CN102636323B (en) * 2012-05-02 2014-09-24 中国计量学院 Negative pressure method detection device for tightness of diaphragm gas meter valve body
CN103257022B (en) * 2013-04-24 2015-06-17 东莞市奇易电子有限公司 Seal testing instrument and seal testing methods
CN103674451A (en) * 2013-12-20 2014-03-26 天津力神电池股份有限公司 Leakage detection method and device for peripheral welding of lithium-ion battery
CN105547610A (en) * 2016-01-13 2016-05-04 安徽宁国晨光精工股份有限公司 Air tightness testing machine
CN106153268B (en) * 2016-08-24 2018-06-15 江苏杰士德精密工业有限公司 Wrist-watch air tightness detection equipment
CN106556430A (en) * 2016-10-17 2017-04-05 金卡高科技股份有限公司 A kind of gas Actual flow test system and method with self-calibration function

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