CN203604748U - Pressure reducing and flow limiting device - Google Patents
Pressure reducing and flow limiting device Download PDFInfo
- Publication number
- CN203604748U CN203604748U CN201320769036.7U CN201320769036U CN203604748U CN 203604748 U CN203604748 U CN 203604748U CN 201320769036 U CN201320769036 U CN 201320769036U CN 203604748 U CN203604748 U CN 203604748U
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- flow limiting
- restriction orifice
- pressure reducing
- restriction
- limiting device
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Abstract
The utility model relates to a pressure reducing and flow limiting device, in particular to a concealed pressure reducing and flow limiting device. According to the technical scheme, the pressure reducing and flow limiting device comprises connecting flanges, multiple levels of flow limiting hole plates, a shell, flow limiting holes and connecting bolts. The shell is of a pipeline-shaped structure, the two sides of the shell are provided with the connecting flanges, the connecting bolts are arranged on the connecting flanges, the flow limiting holes plates are arranged in a cavity of the shell, and one or more flow limiting holes are formed in each level of flow limiting hole plate. The pressure reducing and flow limiting device has the advantages that the hole plates are welded into the pipeline to form the concealed structure, in this way, the cost of the concealed structure is lower than that of an externally clamped structure, the structure length is small, and the occupation space is small.
Description
Technical field
The utility model relates to a kind of step-down current-limiting apparatus, particularly a kind of built-in step-down current-limiting apparatus.
Background technique
The application of step-down current-limiting apparatus, has been widely used in tooling abroad: in chemical plant installations material balance system, in petrochemical industry and distillation system, in Gas Purification Factory, in the control of noble gas amount, Venting and Flare Stack System on the control of amount of natural gas, flash drum solution circulation pump outlet line etc.Domestic than also having certain gap.End is got up, and is mainly divided into following application:
1) fluid needs the place that small flow passes through continuously
2) need the occasion of step-down
3) need to reduce the occasion of noise
4) utilize the cushioning effect of throttle resistance to reduce the occasion of vibration
5) need step-down to reduce the occasion of modulating valve wearing and tearing
6) place of assurance safety operation
In engineering design, on analytical sampling pipe, on pump flush pipe, establish on the by-pass line of stand by pump, all can realize small flow with step-down current-limiting apparatus and pass through continuously.Step-down current-limiting apparatus is set after control valve, reduces pressure drop on valve, reduce the noise of valve, reduce the wearing and tearing of spool, valve seat, avoid occurring flash distillation and the cavitation phenomenon of liquid, extend the life-span of control valve.Step-down current-limiting apparatus is set in control valve bypass, while preventing manually-operable by-pass valve, causes pressure release too fast or liquid level occurs find time to wait danger.The air defence system of pipe arrangement, because pressure drop produces very large noise too greatly, available step-down current-limiting apparatus reduces noise, to improve production environment.
At present, the problem that existing flange external clamping step-down current-limiting apparatus exists is, owing to being that two flanges are clamped orifice plate sheet, easy to process, but cost is high, and for multilevel decompression current-limiting apparatus group, structure length is large, takes up an area wider.
Summary of the invention
The purpose of this utility model is exactly in view of the foregoing defects the prior art has, and a kind of step-down current-limiting apparatus is provided, and orifice plate sheet is welded in pipeline, and this mode cost is low than external clamping, and structure length is little, takes up an area than lacking.
Its technological scheme is: comprise adpting flange, multistage restriction orifice, housing, metering hole, connecting bolt, described housing is pipeline shape structure, the both sides of housing are provided with adpting flange, adpting flange is provided with connecting bolt, described housing inner chamber is provided with multistage restriction orifice, and every one-level restriction orifice is provided with one or more metering hole.
Above-mentioned multistage restriction orifice comprises one-level restriction orifice, secondary restriction orifice, three grades of restriction orifices and level Four restriction orifice, and the interval between above-mentioned four restriction orifices is greater than 250mm, and each restriction orifice is provided with one or more metering hole.
The beneficial effects of the utility model are: the utility model is welded on orifice plate sheet in pipeline, the built-in multistage flow restriction of making, and this mode cost is low compared with external clamping, and structure length is little, takes up an area than lacking.In addition, simple in structure, easy processing, low cost of manufacture, the advantage such as easy for installation, under the prerequisite that meets technological requirement, replace modulating valve with step-down current-limiting apparatus, reach the effect of step-down or current limliting, reduction investment and operation and maintenance expense that can be widely.
Accompanying drawing explanation
Accompanying drawing 2 is structural scheme of mechanism of the second embodiment of the present utility model;
In upper figure: adpting flange 1, one-level restriction orifice 2, housing 3, metering hole 4, connecting bolt 5, secondary restriction orifice 6, three grades of restriction orifices 7, level Four restriction orifice 8.
Embodiment
The utility model comprises adpting flange 1, multistage restriction orifice, housing 3, metering hole 4, connecting bolt 5, described housing 3 is pipeline shape structure, the both sides of housing 3 are provided with adpting flange 1, adpting flange 1 is provided with connecting bolt 5, described housing 3 inner chambers are provided with multistage restriction orifice, every one-level restriction orifice is provided with 3 metering holes 4, and the quantity of metering hole need to be adjusted according to scene herein.
Wherein, multistage restriction orifice comprises one-level restriction orifice 2, secondary restriction orifice 6, three grades of restriction orifices 7 and level Four restriction orifices 8, above-mentioned four restriction orifices are processed separately, are then welded on the inside of housing 3, and each restriction orifice is provided with one or more metering hole 4.
Excessive for preventing pressure drop, air-flow direct puncture aperture and weak antihypertensive effect, adopt and intersect perforate, now for the serious restriction orifice spacing at different levels that prevents from cavitating requires to be greater than 250mm.In some applications, require noise less, so for effective noise decrease, reach the effect of step-down simultaneously, adopt the restriction orifice structure of multistage porous.
Embodiment 2, and difference from Example 1 is: housing 3 inner chambers are provided with multistage restriction orifice, and every one-level restriction orifice is provided with 1 metering hole 4, and each metering hole 4 is not in same level.About determining of orifice plate progression, adopt cavitation number phase approximately principle, can reduce orifice plate progression, and can also prevent that the cavitation erosion of final stage orifice plate is serious.
Effect of the present utility model mainly contains two kinds, i.e. current limliting and step-down.For certain aperture, the flow of orifice plate of flowing through increases with the increase of pressure reduction, but in the time that exceeding a certain numerical value, pressure reduction (is called critical differential pressure), fluid reaches velocity of sound by the flow velocity of orifice plate shrinkage cavity place, at this moment no matter how pressure reduction increases, the flow of orifice plate of flowing through will maintain certain numerical value and no longer increases, and step-down current-limiting apparatus limits the flow of fluid and reduces pressure based on this principle.
The utlity model has simple in structure, easy processing, low cost of manufacture, the advantage such as easy for installation, under the prerequisite that meets technological requirement, replace modulating valve with step-down current-limiting apparatus, reach the effect of step-down or current limliting, reduction investment and operation and maintenance expense that can be widely.In addition, orifice plate sheet is welded in pipeline, the built-in multistage flow restriction of making, this mode cost is low compared with external clamping, and structure length is little, takes up an area than lacking.
Claims (2)
1. a step-down current-limiting apparatus, it is characterized in that: comprise adpting flange (1), multistage restriction orifice, housing (3), metering hole (4), connecting bolt (5), described housing (3) is pipeline shape structure, the both sides of housing (3) are provided with adpting flange (1), adpting flange (1) is provided with connecting bolt (5), described housing (3) inner chamber is provided with multistage restriction orifice, and every one-level restriction orifice is provided with one or more metering hole (4).
2. step-down current-limiting apparatus according to claim 1, it is characterized in that: described multistage restriction orifice comprises one-level restriction orifice (2), secondary restriction orifice (6), three grades of restriction orifices (7) and level Four restriction orifice (8), interval between above-mentioned four restriction orifices is greater than 250mm, and each restriction orifice is provided with one or more metering hole (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320769036.7U CN203604748U (en) | 2013-11-29 | 2013-11-29 | Pressure reducing and flow limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320769036.7U CN203604748U (en) | 2013-11-29 | 2013-11-29 | Pressure reducing and flow limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203604748U true CN203604748U (en) | 2014-05-21 |
Family
ID=50717423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320769036.7U Expired - Fee Related CN203604748U (en) | 2013-11-29 | 2013-11-29 | Pressure reducing and flow limiting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203604748U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075069A (en) * | 2014-07-19 | 2014-10-01 | 李彩云 | Throttling orifice plate component |
| CN109973745A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of pipe vibration damper based on flow fieldoptimization |
| CN111102424A (en) * | 2018-10-29 | 2020-05-05 | 宁波方太厨具有限公司 | Vibration damper and booster pump with same |
| CN111156160A (en) * | 2018-11-07 | 2020-05-15 | 宁波方太厨具有限公司 | Vibration and noise reduction structure of booster pump |
| CN111156161A (en) * | 2018-11-07 | 2020-05-15 | 宁波方太厨具有限公司 | Vibration and noise reduction structure of booster pump |
-
2013
- 2013-11-29 CN CN201320769036.7U patent/CN203604748U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075069A (en) * | 2014-07-19 | 2014-10-01 | 李彩云 | Throttling orifice plate component |
| CN109973745A (en) * | 2017-12-27 | 2019-07-05 | 核动力运行研究所 | A kind of pipe vibration damper based on flow fieldoptimization |
| CN111102424A (en) * | 2018-10-29 | 2020-05-05 | 宁波方太厨具有限公司 | Vibration damper and booster pump with same |
| CN111156160A (en) * | 2018-11-07 | 2020-05-15 | 宁波方太厨具有限公司 | Vibration and noise reduction structure of booster pump |
| CN111156161A (en) * | 2018-11-07 | 2020-05-15 | 宁波方太厨具有限公司 | Vibration and noise reduction structure of booster pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20181129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |