CN106840298B - Anti-reverse air outlet pipe structure - Google Patents
Anti-reverse air outlet pipe structure Download PDFInfo
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- CN106840298B CN106840298B CN201710057037.1A CN201710057037A CN106840298B CN 106840298 B CN106840298 B CN 106840298B CN 201710057037 A CN201710057037 A CN 201710057037A CN 106840298 B CN106840298 B CN 106840298B
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- reverse
- ring
- outlet pipe
- air outlet
- base
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/007—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus comprising means to prevent fraud
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses an anti-reverse air outlet pipe structure, which comprises an air outlet pipe and an anti-reverse base arranged at the upper end of the air outlet pipe, wherein the inner bottom surface of the anti-reverse base is provided with a stepped annular groove, a special-shaped sealing ring and an anti-reverse pressing plate are arranged on the groove, the cross section of the special-shaped sealing ring is of a Z-shaped structure, the outer ring of the special-shaped sealing ring is arranged in the middle of the groove, the inner ring of the special-shaped sealing ring extends out of the groove, the anti-reverse pressing plate presses the outer ring of the special-shaped sealing ring to fix the outer ring of the special-shaped sealing ring, an anti-reverse cover is movably connected below the anti-reverse base, the anti-reverse cover is of an arc-shaped sheet structure with the middle part recessed upwards, and the inner ring of the special-shaped sealing ring is in contact connection with the upper surface of the anti-reverse cover. The invention realizes good reverse-proof effect, and can achieve the effect that the traditional reverse-proof air outlet pipe can not completely avoid reverse air.
Description
Technical Field
The invention relates to a structure of an anti-reverse air outlet pipe, in particular to a structure of an anti-reverse air outlet pipe.
Background
In the gas meters currently being produced and used, there are many methods for directly or indirectly preventing reverse ventilation of the gas meter, such as: there are many methods such as a backstop and a bi-directional counter, but these methods are not satisfactory in some links, or have complicated structures or are too high in cost. No matter what structure is adopted, the final purpose is to ensure that the benefits of the user and the supplier are not damaged if the gas meter is correctly used or not; therefore, the safe and reliable one-way ventilation operation of the gas meter is ensured, and the gas meter is prevented from being still ventilated and used when the gas meter is connected in the opposite direction. Under the condition of reverse ventilation, the gas meter in the current market is mostly prevented from being used for reverse ventilation.
The european union EN1359 gas meter standard clause 6.5.4 specifies that blocking the reverse gas flow means should not allow a reverse flow of more than 2.5% of its maximum flow. At present, most domestic membrane gas meters in China cannot meet the requirement, and are not completely airtight.
The Chinese patent invention discloses an aluminum shell diaphragm gas meter capable of preventing reverse flow of gas, with the application number: CN201520477260.8, comprising an upper shell combination and a lower shell combination; the upper shell combination and the lower shell combination are fixedly connected through bolts; the front end of the upper shell combination is provided with a counter combination; an air outlet pipe is arranged on one side of the upper shell assembly, a backflow prevention base is arranged at the bottom end of the air outlet pipe, and the backflow prevention base is fixedly connected with the air outlet pipe in a clamping way; the anti-countercurrent base is provided with an anti-countercurrent cover which is hinged with the anti-countercurrent base; an anti-countercurrent sealing ring is arranged between the anti-countercurrent base and the air outlet pipe. The anti-backflow base is simple in structure and reasonable in design, the anti-backflow sealing ring is arranged on the anti-backflow base, and the anti-backflow base is convenient to install and reliable in sealing. The anti-countercurrent base is arranged at one end, close to the lower shell combination, in the air outlet pipe, far away from the gas meter connection outlet and is not easy to damage. The invention has low cost, is suitable for wide use, and ensures the benefits of gas companies.
The anti-reversion structure disclosed in the patent of the invention is a commonly used anti-reversion structure on the market, but the structure can reach the standard clause 6.5.4 of the European Union EN1359 gas meter, but cannot realize complete air leakage.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anti-reverse air outlet pipe structure which can realize a completely airtight structure.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a prevent contrary outlet duct structure, includes the outlet duct and sets up the anti-contrary base in the outlet duct upper end, the interior bottom surface of anti-contrary base is provided with echelonment annular groove, the recess on install abnormal shape sealing washer and anti-contrary clamp plate, the cross section of abnormal shape sealing washer be type Z structure, the middle part at the recess is installed to the outer lane of abnormal shape sealing washer, the inner circle of abnormal shape sealing washer stretches out the recess, anti-contrary clamp plate press the outer lane of abnormal shape sealing washer on fix, the below swing joint of anti-contrary base have anti-contrary lid, anti-contrary lid be middle part undercut arc piece structure, the inner circle of abnormal shape sealing washer be connected with the upper surface contact of anti-contrary lid.
The invention further preferably comprises the following steps: the cross section of the anti-reverse base is of an inverted L-shaped structure, the upper portion of the anti-reverse base is covered on the upper surface of the air outlet pipe, the outer side face of the lower end of the anti-reverse base is attached to the inner wall of the air outlet pipe, a notch provided with an O-shaped ring is formed in the inner side of the upper end face of the air outlet pipe, and the O-shaped ring abuts against the bending part of the outer surface of the anti-reverse base. The anti-reverse base is used for installing a plurality of parts for preventing the gas from reversing. The air tightness between the anti-reverse base and the air outlet pipe is also good. Therefore, after the anti-reverse base is installed, an O-shaped ring is arranged between the air outlet pipe and the anti-reverse base, so that air tightness is ensured.
The invention further preferably comprises the following steps: the groove comprises a first step ring arranged on the outer side surface of the anti-reversion base and a second step ring arranged in the middle of the anti-reversion base, the outer ring of the special-shaped sealing ring is arranged on the second step ring, and the bottom surface of the anti-reversion base is an inclined surface inclined inwards. The base of the anti-reverse base is arranged to be an inclined plane inclined inwards, so that the bottom surface of the anti-reverse base does not obstruct the structural change of the special-shaped sealing ring.
The invention further preferably comprises the following steps: the cross section of the anti-reverse pressing plate is of an L-shaped structure, the upper end of the anti-reverse pressing plate is arranged on the first stepped ring, the lower end of the anti-reverse pressing plate is pressed on the lower bottom surface of the outer ring of the special-shaped sealing ring, and the outer ring of the special-shaped sealing ring is fixed by the anti-reverse pressing plate. The outer ring of the special-shaped sealing ring is fixed through the anti-reverse pressure plate, so that the abnormal-shaped sealing ring is ensured not to have a gap between the abnormal-shaped sealing ring and the anti-reverse base in the deformation process, and gas can pass through in a countercurrent mode.
The invention further preferably comprises the following steps: the upper end face of the special-shaped sealing ring inner ring is connected with the inner wall face of the special-shaped sealing ring outer ring through an inclined face. The inclined plane is arranged, so that the inner ring of the special-shaped sealing ring can be bent and deformed and has certain structural strength.
The invention further preferably comprises the following steps: one side of the anti-reverse cover is connected with a rotating shaft, two ends of the rotating shaft are arranged on the anti-reverse base, and the outer diameter of the anti-reverse cover is matched with the inner diameter of the air outlet pipe.
Compared with the prior art, the invention has the advantages that the structure is different from the traditional anti-reverse air outlet pipe structure, the inner bottom surface of the anti-reverse base is provided with a stepped annular groove, and the outer ring of the special-shaped sealing ring is correspondingly fixed on the groove. The cross section of the special-shaped sealing ring is in a Z-shaped structure, and the inner ring of the special-shaped sealing ring extends out of the groove. The special-shaped sealing ring is matched with the anti-reverse cover with the arc-shaped sheet structure with the middle part recessed upwards, so that the anti-reverse air effect is good, and no reverse air is realized. The invention adopts the anti-reverse cover with the arc-shaped sheet structure with the middle part recessed upwards, and normally passing gas walks from top to bottom. Therefore, the gas can easily reach the contact surface of the special-shaped sealing ring and the anti-reverse pressing plate along the upper surface. Only a small force is required, and the gas can push the arc-shaped piece downwards and pass through the gas outlet pipe. When the gas is in countercurrent, namely, the gas walks upwards from the lower part, the anti-reverse cover is arranged, the gas is concentrated in the concave part at the upper end of the anti-reverse cover, and the force is applied to the anti-reverse cover due to the gas in the concave part of the anti-reverse cover, so that the anti-reverse cover is pressed upwards, the anti-reverse cover is in closer contact with the opposite sealing ring, and the air tightness is better. So that the gas cannot pass through the gas outlet pipe from below to above. The cross section of the special-shaped sealing ring is of a Z-shaped structure, when the special-shaped sealing ring is subjected to the acting force of the anti-reverse cover, the special-shaped sealing ring is stressed to be bent and deformed, the contact surface between the bent and deformed special-shaped sealing ring and the anti-reverse pressing plate is larger, and the air tightness effect is better.
In conclusion, the invention realizes a good anti-reverse effect, and can achieve the effect that the traditional anti-reverse air outlet pipe can not completely avoid reverse air.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
fig. 2 is a partial enlarged view at a in fig. 1.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 2: the utility model provides an anti-reverse outlet duct structure, including outlet duct 1 and the anti-reverse base 2 of setting in outlet duct 1 upper end, the interior bottom surface of anti-reverse base 2 is provided with echelonment annular groove 3, install abnormal shape sealing washer 4 and anti-reverse clamp plate 5 on the groove 3, the cross section of abnormal shape sealing washer 4 is type Z structure, the middle part at groove 3 is installed to the outer lane of abnormal shape sealing washer 4, groove 3 is stretched out to the inner circle of abnormal shape sealing washer 4, anti-reverse clamp plate 5 presses on the outer lane of abnormal shape sealing washer 4 to fix the outer lane of abnormal shape sealing washer 4, the below swing joint of anti-reverse base 2 has anti-reverse lid 6, anti-reverse lid 6 is the arc piece structure of middle part undercut, the inner circle of abnormal shape sealing washer 4 will be connected with anti-reverse lid 6's upper surface contact.
The cross section of the anti-reverse base 2 is of an inverted L-shaped structure, the upper portion of the anti-reverse base 2 is covered on the upper surface of the air outlet pipe 1, the outer side face of the lower end of the anti-reverse base 2 is attached to the inner wall of the air outlet pipe 1, the inner side of the upper end face of the air outlet pipe 1 is provided with a notch provided with an O-shaped ring 7, and the O-shaped ring 7 abuts against the bending part of the outer surface of the anti-reverse base 2.
The groove 3 comprises a first step ring 21 arranged on the outer side surface of the anti-reversion base 2 and a second step ring 22 arranged in the middle of the anti-reversion base 2, the outer ring of the special-shaped sealing ring 4 is arranged on the second step ring 22, and the bottom surface of the anti-reversion base 2 is an inclined surface inclined inwards.
The cross section of the anti-reverse pressing plate 5 is of an L-shaped structure, the upper end of the anti-reverse pressing plate 5 is mounted on the first stepped ring 21, the lower end of the anti-reverse pressing plate 5 is pressed on the lower bottom surface of the outer ring of the special-shaped sealing ring 4, and the anti-reverse pressing plate 5 fixes the outer ring of the special-shaped sealing ring 4.
The upper end surface of the inner ring of the special-shaped sealing ring 4 is connected with the inner wall surface of the outer ring of the special-shaped sealing ring 4 through an inclined surface. One side of the anti-reverse cover 6 is connected with a rotating shaft 8, two ends of the rotating shaft 8 are arranged on the anti-reverse base 2, and the outer diameter of the anti-reverse cover 6 is matched with the inner diameter of the air outlet pipe 1.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The utility model provides a prevent contrary outlet duct structure, includes outlet duct and the anti-reverse base of setting in the outlet duct upper end, its characterized in that anti-reverse base's interior bottom surface is provided with echelonment annular groove, the recess on install abnormal shape sealing washer and anti-reverse clamp plate, the cross section of abnormal shape sealing washer be type Z structure, the outer lane of abnormal shape sealing washer install in the middle part of recess, the inner circle of abnormal shape sealing washer stretch out the recess, the cross section of anti-reverse clamp plate be type L structure, the lower extreme of anti-reverse clamp plate press on the lower bottom surface of abnormal shape sealing washer outer lane, anti-reverse clamp plate press on the outer lane of abnormal shape sealing washer and fix the outer lane of abnormal shape sealing washer, the below swing joint of anti-reverse base have anti-reverse lid, anti-reverse lid be the arc piece structure that the middle part upwards sunken, the inner circle of abnormal shape sealing washer will be connected with the upper surface of anti-reverse lid contact; the upper end face of the special-shaped sealing ring inner ring is connected with the inner wall face of the special-shaped sealing ring outer ring through an inclined face.
2. The structure of an anti-reverse air outlet pipe according to claim 1, wherein the cross section of the anti-reverse base is of an inverted L-shaped structure, the upper part of the anti-reverse base is covered on the upper surface of the air outlet pipe, the outer side surface of the lower end of the anti-reverse base is attached to the inner wall of the air outlet pipe, the inner side of the upper end surface of the air outlet pipe is provided with a notch provided with an O-shaped ring, and the O-shaped ring is abutted against the bending part of the outer surface of the anti-reverse base.
3. The structure of an anti-reverse air outlet pipe according to claim 1, wherein the groove comprises a first step ring arranged on the outer side surface of the anti-reverse base and a second step ring arranged in the middle of the anti-reverse base, the outer ring of the special-shaped sealing ring is arranged on the second step ring, and the bottom surface of the anti-reverse base is an inclined surface inclined inwards.
4. The structure of an anti-reverse air outlet pipe according to claim 3, wherein the upper end of the anti-reverse pressing plate is mounted on the first step ring, and the anti-reverse pressing plate fixes the outer ring of the special-shaped sealing ring.
5. The structure of an anti-reverse air outlet pipe according to claim 1, wherein one side of the anti-reverse cover is connected with a rotating shaft, two ends of the rotating shaft are arranged on the anti-reverse base, and the outer diameter of the anti-reverse cover is matched with the inner diameter of the air outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710057037.1A CN106840298B (en) | 2017-01-22 | 2017-01-22 | Anti-reverse air outlet pipe structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710057037.1A CN106840298B (en) | 2017-01-22 | 2017-01-22 | Anti-reverse air outlet pipe structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106840298A CN106840298A (en) | 2017-06-13 |
| CN106840298B true CN106840298B (en) | 2023-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710057037.1A Active CN106840298B (en) | 2017-01-22 | 2017-01-22 | Anti-reverse air outlet pipe structure |
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| Country | Link |
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| CN (1) | CN106840298B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303001A (en) * | 2000-01-05 | 2001-07-11 | 中国科学技术大学 | Antiexplosion and fire-stopping unit for domestic gasometer of pipeline gas |
| KR200388636Y1 (en) * | 2005-04-21 | 2005-06-29 | (주)대양기연 | Damper for flowing backward prevention |
| KR200423351Y1 (en) * | 2006-05-26 | 2006-08-07 | 이영춘 | Gas meter |
| CN2854521Y (en) * | 2005-06-15 | 2007-01-03 | 北京金创联合燃气表有限公司 | Anti-theft gas meter |
| CN201417159Y (en) * | 2009-04-23 | 2010-03-03 | 浙江正泰仪器仪表有限责任公司 | Reverse ventilation prevention device for gas meter |
| JP2010145174A (en) * | 2008-12-17 | 2010-07-01 | Ricoh Elemex Corp | Gas meter |
| EP2259030A1 (en) * | 2009-06-03 | 2010-12-08 | Itron France | Fluid meter, in particular of water |
| JP2014107340A (en) * | 2012-11-26 | 2014-06-09 | Toyota Motor Corp | Waterproof seal structure for case |
| CN203811224U (en) * | 2014-04-11 | 2014-09-03 | 金卡高科技股份有限公司 | Diaphragm gas meter shell structure |
| CN204788534U (en) * | 2015-07-06 | 2015-11-18 | 上海真兰仪表科技股份有限公司 | Prevent aluminum hull diaphragm type gas table of gaseous reverse flow |
| CN206420522U (en) * | 2017-01-22 | 2017-08-18 | 浙江蓝宝石仪表科技有限公司 | A kind of anti-reverse outlet duct structures |
-
2017
- 2017-01-22 CN CN201710057037.1A patent/CN106840298B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303001A (en) * | 2000-01-05 | 2001-07-11 | 中国科学技术大学 | Antiexplosion and fire-stopping unit for domestic gasometer of pipeline gas |
| KR200388636Y1 (en) * | 2005-04-21 | 2005-06-29 | (주)대양기연 | Damper for flowing backward prevention |
| CN2854521Y (en) * | 2005-06-15 | 2007-01-03 | 北京金创联合燃气表有限公司 | Anti-theft gas meter |
| KR200423351Y1 (en) * | 2006-05-26 | 2006-08-07 | 이영춘 | Gas meter |
| JP2010145174A (en) * | 2008-12-17 | 2010-07-01 | Ricoh Elemex Corp | Gas meter |
| CN201417159Y (en) * | 2009-04-23 | 2010-03-03 | 浙江正泰仪器仪表有限责任公司 | Reverse ventilation prevention device for gas meter |
| EP2259030A1 (en) * | 2009-06-03 | 2010-12-08 | Itron France | Fluid meter, in particular of water |
| JP2014107340A (en) * | 2012-11-26 | 2014-06-09 | Toyota Motor Corp | Waterproof seal structure for case |
| CN203811224U (en) * | 2014-04-11 | 2014-09-03 | 金卡高科技股份有限公司 | Diaphragm gas meter shell structure |
| CN204788534U (en) * | 2015-07-06 | 2015-11-18 | 上海真兰仪表科技股份有限公司 | Prevent aluminum hull diaphragm type gas table of gaseous reverse flow |
| CN206420522U (en) * | 2017-01-22 | 2017-08-18 | 浙江蓝宝石仪表科技有限公司 | A kind of anti-reverse outlet duct structures |
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| Publication number | Publication date |
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| CN106840298A (en) | 2017-06-13 |
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