CN201417159Y - Reverse ventilation prevention device for gas meter - Google Patents
Reverse ventilation prevention device for gas meter Download PDFInfo
- Publication number
- CN201417159Y CN201417159Y CN200920118476XU CN200920118476U CN201417159Y CN 201417159 Y CN201417159 Y CN 201417159Y CN 200920118476X U CN200920118476X U CN 200920118476XU CN 200920118476 U CN200920118476 U CN 200920118476U CN 201417159 Y CN201417159 Y CN 201417159Y
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- reverse
- gas
- gas meter
- oscillating deck
- meter
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Abstract
The utility model relates to the technical field of gas meters, particularly to a reverse ventilation prevention device for a gas meter. The reverse ventilation prevention device is arranged in a gaspassage inside the gas meter, and comprises a reverse oscillation prevention deck and a reverse oscillation prevention deck connecting sleeve, wherein the outer surface of the reverse oscillation prevention deck connecting sleeve is matched with the inner wall of the gas passage of the gas meter. The reverse oscillation prevention deck is mounted on one side in the gas outlet direction of the reverse oscillation prevention deck connecting sleeve, and the reverse oscillation prevention deck is opened under the action of the work pressure to allow the gas to pass when the gas meter is connectedin the forward direction for work; when the gas meter does not work, the reverse oscillation prevention deck is reset to the nature under the dead weight to contact the matching surface of the reverseoscillation prevention deck connecting sleeve so as to be sealed; and when the gas meter is connected in the reverse direction, the reverse oscillation prevention deck prevents the airflow to pass, and the gas meter can't be ventilated. The device provided by the utility model has simple structure, convenient installation, extensive application and low cost, and can be designed and produced according to the prior common gas meters, and no special internal structure of the gas meter needs to be designed for assembling the device.
Description
Technical field
The utility model relates to the gas meter, flow meter technical field, is the anti-reverse air-breather of a kind of gas meter, flow meter; Be used to block the gas meter, flow meter inner counter to air current flow.
Background technology
In view of the reverse gas flow meter of the EN of European Union 1359 gas meter, flow meter standard clause 6.5.4 regulation blocking-up otherwise allow by 2.5% reverse flow greater than its maximum flow, and present domestic family expenses diaphragm gas meter does not reach this requirement mostly.
Produce at present with the gas meter, flow meter that uses in, prevent that directly or indirectly the method for opposite direction ventilation of gas meter, flow meter is a lot, as: holdback is arranged, the method that bi-directional counter etc. are a lot, but these methods on some link and unsatisfactory, perhaps complex structure, perhaps cost is too high.No matter take what structure, but final purpose to make exactly gas meter, flow meter correctly whether use, and can both guarantee that user and supplier's interests do not suffer damage; Will guarantee the safe and reliable of the unidirectional ventilation work of gas meter, flow meter like this, the gas meter, flow meter use of still ventilating when stopping gas meter, flow meter and connecting in the other direction.Gas meter, flow meter is under the situation of oppositely ventilation in the market, mostly do not stop the gas meter, flow meter use of oppositely ventilating,
Summary of the invention
The purpose of this utility model is to solve above-mentioned defective of the prior art, and a kind of gas meter, flow meter is provided, and this gas meter, flow meter can make gas meter, flow meter stop air feed under situation of installing violating the regulations.
Realize that the technical scheme that above-mentioned purpose adopted is: the anti-reverse air-breather of a kind of gas meter, flow meter, this device is installed in the gas meter, flow meter gas inside passage, comprise anti-reverse oscillating deck and anti-reverse oscillating deck adapter sleeve, it is characterized in that described anti-reverse oscillating deck adapter sleeve outside surface matches with gas meter, flow meter gas passage inwall.Described anti-reverse oscillating deck is installed in a side of described anti-reverse oscillating deck adapter sleeve gas stream outgoing direction, when described anti-reverse oscillating deck is rocked to when contacting with described anti-reverse oscillating deck adapter sleeve, the sealing that cooperatively interacts of the surface of contact of described anti-reverse oscillating deck and anti-reverse oscillating deck adapter sleeve port.
The anti-reverse air-breather of gas meter, flow meter described in the utility model is installed in the gas meter, flow meter gas inside passage, when the gas forward flow, air-flow promotes described anti-reverse oscillating deck and leaves anti-reverse oscillating deck adapter sleeve port position, and anti-reverse oscillating deck is opened, and gas passes through smoothly; When gas meter, flow meter was not worked, anti-reverse oscillating deck was replied state of nature and is contacted and seal with anti-reverse oscillating deck adapter sleeve mating surface under the condition of deadweight; When gas meter, flow meter oppositely connects, anti-reverse oscillating deck will stop the air communication mistake, and gas meter, flow meter can not be ventilated.
In the utility model, described anti-reverse oscillating deck can be hinged on the anti-reverse oscillating deck adapter sleeve by pivot pin.
When preventing that air-flow is too small, air-flow thrust can't promote the problem of anti-reverse oscillating deck.As a kind of improvement of the present utility model, can on anti-reverse oscillating deck, resetting-mechanism be installed, make it under the normal condition that no stream passes through, automatically reset to described anti-reverse oscillating deck port fit-state.This resetting-mechanism can be mounted in the torsion spring on the anti-reverse oscillating deck pivot pin.Anti-reverse air-breather described in the utility model can certainly be installed in the positive draft flow locations that makes progress.When airless passed through, anti-reverse oscillating deck just can reset under the self gravitation effect so, and fitted with anti-reverse oscillating deck adapter sleeve port.This scheme need not resetting-mechanism, and it is the simplest to install this body structure, is excellent scheme of the present utility model.
The anti-reverse air-breather of gas meter, flow meter of the present utility model is provided with the position in gas meter, flow meter internal gas passage, can select the gas feed or the gas outlet of draft tube place, escape pipe place or air chamber.When selecting different installation sites, should make accommodation during the device design parameter, as adjust anti-reverse oscillating deck self gravitation, rotary damping, as described in the roughness of surface of contact of anti-reverse oscillating deck and anti-reverse oscillating deck adapter sleeve port, guaranteeing that less back draught can promote anti-reverse oscillating deck and press to anti-reverse oscillating deck adapter sleeve port, and guarantee between the surface of contact of itself and anti-reverse oscillating deck adapter sleeve port better sealing is arranged.
The anti-reverse air-breather of gas meter, flow meter of the present utility model has following advantage: one, simple in structure, and only by a plate-shaped member and hinged the forming of shell-like parts.Two, the convenient installation, during design, with the friction tight size of internal diameter that the installation position gas passage was elected and be scheduled to anti-reverse oscillating deck adapter sleeve outside dimension as, during installation, the gas passage of only anti-reverse oscillating deck adapter sleeve need being packed into firmly gets final product.Three, the utility model device can be produced according to the design of existing general gas table, need not to assembling this device specialized designs gas meter, flow meter inner structure, and wide application, and cost is low.
Description of drawings
Fig. 1 is that the anti-reverse air-breather of gas meter, flow meter described in the utility model is at gas meter, flow meter mounting structure synoptic diagram.
Fig. 2 is the gas meter, flow meter gas reversed flow synoptic diagram that the anti-reverse air-breather of gas meter, flow meter described in the utility model is installed.
Embodiment
With reference to Fig. 1, gas meter, flow meter shown in the figure comprises gas meter, flow meter shell 7, air chamber 5, and cartridge assemblies 6, meter connector 2, draft tube, escape pipe 1 is provided with anti-reverse air-breather in the described escape pipe.Described anti-reverse air-breather comprises anti-reverse oscillating deck 3 and anti-reverse oscillating deck adapter sleeve 4, and described anti-reverse oscillating deck adapter sleeve 4 outside surfaces are connected with escape pipe 1 inwall wringing fit.Described anti-reverse oscillating deck 3 is hinged on described anti-reverse oscillating deck adapter sleeve 4 upper port one side, can fit with described anti-reverse oscillating deck adapter sleeve 4 upper port to lower swing when described anti-reverse oscillating deck 3, and both binding faces seal.
During gas meter, flow meter work, anti-reverse oscillating deck 3 is under the effect of gas meter, flow meter pressure reduction, and anti-reverse oscillating deck 3 is around the junction swing of anti-reverse oscillating deck 3 with anti-reverse oscillating deck adapter sleeve 4; Anti-reverse oscillating deck 3 is opened and is had gas to pass through during gas meter, flow meter forward connection work, and anti-reverse oscillating deck 3 was not replied state of nature when gas meter, flow meter was not worked under the condition of deadweight; When gas meter, flow meter oppositely connects, anti-reverse oscillating deck 3 will oppositely be compressed and can not ventilate by the gas meter, flow meter air-flow, reach to prevent the oppositely function of ventilation, as shown in Figure 2.
What be understood that is; the foregoing description is to explanation of the present utility model and further specifies; be not the qualification to the utility model protection domain, any innovation and creation that do not exceed the utility model connotation scope all should fall within the protection domain of the present utility model.
Claims (6)
1, the anti-reverse air-breather of a kind of gas meter, flow meter, this device is installed in the gas meter, flow meter gas inside passage, comprise anti-reverse oscillating deck (3) and anti-reverse oscillating deck adapter sleeve (4), it is characterized in that described anti-reverse oscillating deck adapter sleeve (4) outside surface matches with gas meter, flow meter gas passage inwall.Described anti-reverse oscillating deck (3) is installed in a side of described anti-reverse oscillating deck adapter sleeve (4) gas stream outgoing direction, when described anti-reverse oscillating deck (3) is rocked to and described anti-reverse oscillating deck adapter sleeve (4) when contacting, the sealing that cooperatively interacts of the surface of contact of described anti-reverse oscillating deck (3) and anti-reverse oscillating deck adapter sleeve (4) port.
2, the anti-reverse air-breather of a kind of gas meter, flow meter according to claim 1 is characterized in that, described anti-reverse oscillating deck (3) is hinged by pivot pin and described anti-reverse oscillating deck adapter sleeve (4).
3, the anti-reverse air-breather of a kind of gas meter, flow meter according to claim 2 is characterized in that, this device is arranged on the position that positive draft upwards flows in the gas meter, flow meter gas passage.
4, the anti-reverse air-breather of a kind of gas meter, flow meter according to claim 3 is characterized in that, this device is arranged in the escape pipe (1) of gas meter, flow meter.
5, the anti-reverse air-breather of a kind of gas meter, flow meter according to claim 1 is characterized in that, this device also comprises the resetting-mechanism that described anti-reverse oscillating deck (3) is reclined to described anti-reverse oscillating deck adapter sleeve (4).
6, the anti-reverse air-breather of a kind of gas meter, flow meter according to claim 5 is characterized in that, described resetting-mechanism is and the coaxial mounted torch spring of turning round of described anti-reverse oscillating deck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920118476XU CN201417159Y (en) | 2009-04-23 | 2009-04-23 | Reverse ventilation prevention device for gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920118476XU CN201417159Y (en) | 2009-04-23 | 2009-04-23 | Reverse ventilation prevention device for gas meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201417159Y true CN201417159Y (en) | 2010-03-03 |
Family
ID=41793582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920118476XU Expired - Lifetime CN201417159Y (en) | 2009-04-23 | 2009-04-23 | Reverse ventilation prevention device for gas meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201417159Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527893A (en) * | 2013-11-04 | 2014-01-22 | 叶安生 | Sealing covering type gas backflow blocking device |
| CN106840298A (en) * | 2017-01-22 | 2017-06-13 | 浙江蓝宝石仪表科技有限公司 | A kind of anti-reverse outlet duct structures |
| CN113117620A (en) * | 2019-12-30 | 2021-07-16 | 湖北江田精密化学有限公司 | Reation kettle pull throughs |
-
2009
- 2009-04-23 CN CN200920118476XU patent/CN201417159Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527893A (en) * | 2013-11-04 | 2014-01-22 | 叶安生 | Sealing covering type gas backflow blocking device |
| CN106840298A (en) * | 2017-01-22 | 2017-06-13 | 浙江蓝宝石仪表科技有限公司 | A kind of anti-reverse outlet duct structures |
| CN106840298B (en) * | 2017-01-22 | 2023-08-18 | 浙江蓝宝石仪表科技有限公司 | Anti-reverse air outlet pipe structure |
| CN113117620A (en) * | 2019-12-30 | 2021-07-16 | 湖北江田精密化学有限公司 | Reation kettle pull throughs |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100303 |
|
| CX01 | Expiry of patent term |