CN102636237B - Valve cover tightness detection device for diaphragm gas meter by using negative pressure method - Google Patents
Valve cover tightness detection device for diaphragm gas meter by using negative pressure method Download PDFInfo
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- CN102636237B CN102636237B CN 201210131679 CN201210131679A CN102636237B CN 102636237 B CN102636237 B CN 102636237B CN 201210131679 CN201210131679 CN 201210131679 CN 201210131679 A CN201210131679 A CN 201210131679A CN 102636237 B CN102636237 B CN 102636237B
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- diaphragm gas
- meter valve
- monitor station
- valve gap
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Abstract
The invention relates to a valve cover tightness detection device for a diaphragm gas meter by using a negative pressure method. The conventional device depends on the work experience of operators and has slow detection speed, low detection precision and poor reliability in addition. According to the invention, a lower base is installed on a working table, an upper base is fixed on the lower base, a detecting table is in threaded fit with the upper base; the base is hollow, and the detecting table is hollow; a bracket is fixed on the upper base, a stepping motor is fixed on the bracket, a straight bar is connected with the stepping motor through a coupler, the straight bar is equipped with a spring, and a clamping jaw is fixed on the straight bar; a pressure equalizing groove is arranged on an upper surface of the detecting table, and throttling holes are uniformly distributed in the pressure equalizing groove. The detection device provided by the invention has the advantages of fast detection speed, high detection precision and good reliability and is applied to the rapid detection of the tightness of the valve cover by operators in a workshop.
Description
Technical field
The present invention relates to a kind of gas meter, flow meter valve gap device for detecting sealability, relate in particular to a kind of diaphragm gas meter valve bonnet seal negative pressure method pick-up unit.
Background technology
Along with the continuous development of social civilization and the continuous deterioration of environment, people constantly increase the demand of clean energy resource, such as rock gas, biogas etc., this just need have point-device gas meter, flow meter to remove the combustion gas volume of stoichiometric consumption, and diaphragm gas meter is because of long service life, and compact conformation is reasonable, safe and reliable, stable performance, the characteristics of accurate measurement are most widely used general, gas meters that quantity is maximum on the current social.
The rotation diaphragm gas meter is a kind of common type in the diaphragm gas meter, switches the metering air chamber to-and-fro movement that makes diaphragm gas meter inside by the orderly relatively rotation between valve gap and the valve body, constantly circulation, thus realization is to the metering of gas.If will guarantee to rotate diaphragm gas meter accuracy of measuring height, reduce measurement shoutage, guarantee the fairness of trade settlement, then the sealing between this valve body and the valve gap is most important.In actual production, need independently the contact portion sealing between valve body and the valve gap to be detected, to guarantee production efficiency.At present, detection method and the device of more existing valve bonnet seals.Though such detection method and device are economical and practical, fall behind, and need to rely on plant operations personnel's working experience, detection speed is slow in addition, accuracy of detection is low, and reliability is bad, causes the waste of product easily.
Summary of the invention
For problem such as the reliability of the backwardness that overcomes classic method and conventional apparatus is low, the object of the present invention is to provide a kind of diaphragm gas meter valve bonnet seal negative pressure method pick-up unit.
The present invention includes worktable, lower bottom base, upper bed-plate and monitor station; Lower bottom base is installed on the worktable, and upper bed-plate is fixed on the lower bottom base, monitor station and upper bed-plate threaded engagement; The upper bed-plate inner hollow forms first cavity, and the monitor station inner hollow forms second cavity, and first cavity and second cavity connect.
Support is fixed on the upper bed-plate, and stepper motor is fixed on the support, and straight-bar links to each other with stepper motor by shaft coupling, and spring is housed on the straight-bar, and jaw is fixed on the straight-bar.
In lower bottom base, be provided with baroceptor, baroceptor is by high-speed rotary hydraulic quick coupler and the first cavity UNICOM, another one high-speed rotary hydraulic quick coupler also is set in lower bottom base, one end of this high-speed rotary hydraulic quick coupler is by pipeline and the first cavity UNICOM, and the other end connects air-extractor by tracheae.
Upper surface at monitor station has balancing slit, the shape of described balancing slit and diaphragm gas meter valve cover surfaces to be detected are complementary, when making the relative balancing slit of measured surface in the diaphragm gas meter valve gap change 90 °, measured surface in the diaphragm gas meter valve gap can be detected fully, described balancing slit is by throttle orifice and the second cavity UNICOM of the upper surface of monitor station, and described throttle orifice is evenly distributed on the balancing slit.
Register pin also is housed on monitor station, and register pin lays respectively at a side of balancing slit and the center of monitor station, and register pin is used for diaphragm gas meter valve gap location, and the jaw on the straight-bar is used for fixedly diaphragm gas meter valve gap.
Described monitor station upper surface roughness is less than 0.8
Described throttle orifice is separately positioned on the two ends of balancing slit, the midpoint of semi arch balancing slit, 1/3rd places of quadrant arc balancing slit and 2/3rds places.
Described jaw and diaphragm gas meter valve gap are complementary, and the elastic force effect straight down by the straight-bar upper spring is fixed on the diaphragm gas meter valve gap on the monitor station.
The beneficial effect that the present invention has is:
1, diaphragm gas meter valve seal negative pressure method pick-up unit of the present invention, detection speed is fast, the accuracy of detection height, good reliability is applicable to the sealing of operating personnel's fast detecting valve gap in the workshop.
2, diaphragm gas meter valve bonnet seal negative pressure method pick-up unit of the present invention is convenient to processing and operation.
The present invention is applicable to rotation diaphragm gas meter valve gap.
Description of drawings
Fig. 1 is sectional view of the present invention;
Fig. 2 is side view of the present invention;
Fig. 3 is vertical view of the present invention;
Fig. 4 is the sectional view after Fig. 1 is equipped with the diaphragm gas meter valve gap;
Fig. 5 is the side view of Fig. 4;
Fig. 6 is monitor station workplace synoptic diagram;
Fig. 7 is diaphragm gas meter valve gap front view to be measured;
Fig. 8 is the vertical view of the diaphragm gas meter valve gap to be measured of Fig. 7;
Fig. 9 is the measured surface synoptic diagram of diaphragm gas meter valve gap to be measured;
Among the figure: 1, worktable, 2, lower bottom base, 3, upper bed-plate, 4, monitor station, 5, support, 6, stepper motor, 7, shaft coupling, 8, straight-bar, 9, jaw, 10, spring, 11, baroceptor, 12, the high-speed rotary hydraulic quick coupler, 13, tracheae, 14, the M8 socket head cap screw, 15, the M12 socket head cap screw, 16, the M10 socket head cap screw, 17, diaphragm gas meter valve gap, 18, register pin, 19, pad, 20, the M6 nut, 21, throttle orifice, 22, balancing slit, 23, the M4 socket head cap screw.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5, a kind of diaphragm gas meter valve bonnet seal negative pressure method pick-up unit comprises worktable 1, lower bottom base 2, upper bed-plate 3 and monitor station 4; Lower bottom base 2 is installed on the worktable 1 by four M10 socket head cap screws 16, and upper bed-plate 3 is fixed on the lower bottom base 2 by two M12 socket head cap screws 15, monitor station 4 and upper bed-plate 3 threaded engagement, the middle sealing that guarantees both with band; Upper bed-plate 3 inner hollow form first cavity, and monitor station 4 inner hollow form second cavity, and first cavity and second cavity connect, and monitor station 4 is cylindrical, and manufactured materials is selected wrought aluminium 6061 for use.
Support 5 fixes 14 on upper bed-plate 3 by the M8 socket head cap screw, stepper motor 6 is fixed on support 5 tops by four M4 socket head cap screws 23, one end of straight-bar 8 links to each other with stepper motor 6 by shaft coupling 7, spring 10 is housed on the straight-bar 8, and jaw 9 is fixed on straight-bar 8 other ends by M6 nut 20 and pad 19;
In lower bottom base 2, be provided with baroceptor 11, baroceptor 11 is by high-speed rotary hydraulic quick coupler 12 and the first cavity UNICOM, another one high-speed rotary hydraulic quick coupler 12 also is set in lower bottom base 2, one end of this high-speed rotary hydraulic quick coupler 12 is by pipeline and the first cavity UNICOM, and the other end connects air-extractor by tracheae 13;
Upper surface at monitor station 4 has balancing slit 22, the shape of balancing slit 22 and diaphragm gas meter valve gap 17 surfaces to be detected are complementary, when making the relative balancing slit 22 of measured surface in the diaphragm gas meter valve gap 17 change 90 °, measured surface in the diaphragm gas meter valve gap 17 still can be detected fully, balancing slit 22 is by throttle orifice 21 and the second cavity UNICOM of the upper surface of monitor station 4, throttle orifice 21 is evenly distributed on the balancing slit 22, have seven throttle orifices 21, wherein four throttle orifices 21 are arranged on the two ends of balancing slit 22 on the diametric(al), a throttle orifice 21 is arranged on the midpoint of semi arch balancing slit 22, and two other throttle orifice 21 is separately positioned on 1/3rd places and 2/3rds places of quadrant arc balancing slit 22;
Register pin 18 also is housed on monitor station 4, and register pin 18 lays respectively at a side of balancing slit 22 and the center of monitor station 4, and register pin 18 is used for the location of diaphragm gas meter valve gap 17, and the jaw 9 on the straight-bar 8 is used for fixedly diaphragm gas meter valve gap 17.
As shown in Figure 6, monitor station 4 surfaces have throttle orifice 21 and balancing slit 22, are conducive to gas and evenly distribute at workplace, reduce the air film vibration, improve accuracy of detection.Monitor station 4 surfacenesses are less than 0.8
, satisfy its roughness less than diaphragm gas meter valve gap 17 measured surface roughness, these monitor station 4 surfaces need through anodized.
As Fig. 7, shown in Figure 8, the outer shape of diaphragm gas meter valve gap 17 is special, need utilize spring 10 and supporting jaw 9 to fix.
As shown in Figure 9, dash area is the measured surface of diaphragm gas meter valve gap 17.
During work, jaw 9 is fixed diaphragm gas meter valve gap 17, drive jaw 9 half-twists by stepper motor 6, be that diaphragm gas meter valve gap 17 has also rotated 90 °, stop then, bleed a period of time by tracheae 13 simultaneously in the process of half-twist, stop then bleeding, wait for after 3 seconds, read baroceptor 11 data.Because the sealing property of diaphragm gas meter valve gap 17 can impact installing inner air pressure, so the variable quantity of air pressure can detect by baroceptor 11.At first utilize this pick-up unit to detect the qualified diaphragm gas meter valve gap 17 of sealing, obtain corresponding data, formulate corresponding qualified index according to these data, detect diaphragm gas meter valve gap 17 to be measured then, according to the data of the baroceptor data of obtaining 11 and the index contrast of formulating before, thus the sealing property of judgement diaphragm gas meter valve gap 17.
The present invention establishes throttle orifice and balancing slit at workplace, adopt the negative pressure method, variation by high precision, highly sensitive baroceptor real-time monitoring device air pressure inside, judge the sealing of diaphragm gas meter valve gap, can realize effectively that detection speed is fast, precision is high, good reliability, and can realize digital visual, need not to rely on the personal experience, advanced practical, easy operating.
Claims (4)
1. a diaphragm gas meter valve bonnet seal negative pressure method pick-up unit is characterized in that: comprise worktable (1), lower bottom base (2), upper bed-plate (3) and monitor station (4); Lower bottom base (2) is installed on the worktable (1), and upper bed-plate (3) is fixed on the lower bottom base (2), monitor station (4) and upper bed-plate (3) threaded engagement; Upper bed-plate (3) inner hollow forms first cavity, and monitor station (4) inner hollow forms second cavity, and first cavity and second cavity connect;
Support (5) is fixed on the upper bed-plate (3), and stepper motor (6) is fixed on the support (5), and straight-bar (8) links to each other with stepper motor (6) by shaft coupling (7), and spring (10) is housed on the straight-bar (8), and jaw (9) is fixed on the straight-bar (8);
In lower bottom base (2), be provided with baroceptor (11), baroceptor (11) is by the first high-speed rotary hydraulic quick coupler (12) and the first cavity UNICOM, the second high-speed rotary hydraulic quick coupler (12) also is set in lower bottom base (2), one end of the second high-speed rotary hydraulic quick coupler (12) is by pipeline and the first cavity UNICOM, and the other end connects air-extractor by tracheae (13);
Upper surface at monitor station (4) has balancing slit (22), the shape of described balancing slit (22) and diaphragm gas meter valve gap (17) surface to be detected are complementary, when making the relative balancing slit of measured surface (22) in the diaphragm gas meter valve gap (17) change 90 °, measured surface in the diaphragm gas meter valve gap (17) can be detected fully, described balancing slit (22) is by the throttle orifice (21) and the second cavity UNICOM of the upper surface of monitor station (4), and described throttle orifice (21) is evenly distributed on the balancing slit (22);
Register pin (18) also is housed on monitor station (4), register pin (18) lays respectively at a side of balancing slit (22) and the center of monitor station (4), register pin (18) is used for diaphragm gas meter valve gap (17) location, and the jaw (9) on the straight-bar (8) is used for fixedly diaphragm gas meter valve gap (17).
2. a kind of diaphragm gas meter valve bonnet seal negative pressure method pick-up unit according to claim 1, it is characterized in that: described monitor station (4) upper surface roughness is less than 0.8 μ m.
3. a kind of diaphragm gas meter valve bonnet seal negative pressure method pick-up unit according to claim 1, it is characterized in that: described throttle orifice (21) is separately positioned on the two ends of balancing slit on the diametric(al) (22), the midpoint of semi arch balancing slit (22), 1/3rd places and 2/3rds places of quadrant arc balancing slit (22).
4. a kind of diaphragm gas meter valve bonnet seal negative pressure method pick-up unit according to claim 1, it is characterized in that: described jaw (9) is complementary with diaphragm gas meter valve gap (17), elastic force effect straight down by straight-bar (8) upper spring (10) is fixed on diaphragm gas meter valve gap (17) on the monitor station (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210131679 CN102636237B (en) | 2012-05-02 | 2012-05-02 | Valve cover tightness detection device for diaphragm gas meter by using negative pressure method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210131679 CN102636237B (en) | 2012-05-02 | 2012-05-02 | Valve cover tightness detection device for diaphragm gas meter by using negative pressure method |
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| CN102636237A CN102636237A (en) | 2012-08-15 |
| CN102636237B true CN102636237B (en) | 2013-09-04 |
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| CN 201210131679 Active CN102636237B (en) | 2012-05-02 | 2012-05-02 | Valve cover tightness detection device for diaphragm gas meter by using negative pressure method |
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| CN106226005B (en) * | 2016-07-22 | 2019-04-02 | 成都秦川物联网科技股份有限公司 | Gas meter, flow meter valve deck, seat leakage detection device |
| CN109731803A (en) * | 2018-12-27 | 2019-05-10 | 贵州华烽汽车零部件有限公司 | Car expansion tank valve deck automatic detection device |
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| JPS60231131A (en) * | 1984-04-28 | 1985-11-16 | Mitsubishi Heavy Ind Ltd | Method and apparatus for testing joint of piping |
| DE20015703U1 (en) * | 2000-09-11 | 2001-02-22 | Dungs Karl Gmbh & Co | Device for checking the tightness of valves in a gas section |
| CN201637555U (en) * | 2010-01-26 | 2010-11-17 | 台州环天机械有限公司 | Working table for detecting air tightness of air valve |
| CN102128707B (en) * | 2010-12-30 | 2013-05-01 | 无锡鹰贝精密轴承有限公司 | Valve element airtightness testing device |
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