CN105840945A - Throttle orifice - Google Patents
Throttle orifice Download PDFInfo
- Publication number
- CN105840945A CN105840945A CN201610371558.XA CN201610371558A CN105840945A CN 105840945 A CN105840945 A CN 105840945A CN 201610371558 A CN201610371558 A CN 201610371558A CN 105840945 A CN105840945 A CN 105840945A
- Authority
- CN
- China
- Prior art keywords
- orifice plate
- sleeve pipe
- sleeve
- flanges
- hole plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/027—Throttle passages
- F16L55/02709—Throttle passages in the form of perforated plates
- F16L55/02718—Throttle passages in the form of perforated plates placed transversely
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a throttle orifice. The throttle orifice comprises two half shell bodies which are connected through flanges to form a shell. A sleeve is arranged on the inner circumferential wall of the shell. A secondary hole plate is arranged in the middle portion of the sleeve. A plurality of primary hole plates are evenly distributed on the inner wall of the sleeve with the secondary hole plate as the symmetric axis. After penetrating the sleeve, the end portions of the two ends of the secondary hole plate extend towards the gap between the two flanges. Sealing gaskets are arranged on the two side walls of extension sections of the secondary hole plate. The secondary hole plate is right opposite to the connecting end faces of the two half shell bodies. The two extension sections of the secondary hole plate are arranged between the two flanges, and meanwhile the sealing gaskets are laid on the two side walls of the extension sections. The two half shell bodies are fastened together through a bolt, the opposite end faces of the two flanges are directly and tightly pressed on the sealing gaskets, and accordingly sealing between the sleeve and the shell is finished.
Description
Technical field
The present invention relates to flow transducer field, specifically refer to a kind of restricting orifice.
Background technology
When throttling arrangement in fluid flows through pipeline, a fluid stream will form local contraction at the throttling element of throttling arrangement, so that flow velocity increases, static pressure is low, then just creating pressure drop, i.e. pressure reduction before and after throttling element, the flow of media flow is the biggest, the pressure reduction produced before and after throttling element is the biggest, it is possible to weigh the size of fluid flow by measuring pressure reduction.But the pressure at the vena contracta of the orifice plate in existing throttling arrangement drops to below the saturated vapour pressure under liquid corresponding temperature, a fluid stream just has steam and the gas effusion being dissolved in water, forming the small bubble that steam mixes with gas, pressure is the lowest, and steam bubble is the most；When the pressure in orifice plate downstream is still below the saturated vapour pressure of liquid, the pipeline in downstream is continued to produce by steam bubble, and liquid vapour two-phase mixtures exists；If downstream pressure returns to the saturated vapour pressure higher than liquid, steam bubble, under the effect of high pressure, condenses rapidly and ruptures, in the moment that steam bubble ruptures, producing hole, local, water under high pressure flows to, with high speed, the space that these former steam bubbles occupy, and forms an impulsive force；Owing to the gas in steam bubble and steam have little time all to dissolve in moment and condense, under impact force action, it is divided into again small bubble, then by water under high pressure compression, condensation, is thusly-formed the most repeatedly, orifice plate can be affected by the most serious cavitation, causes be substantially reduced its service life；And the replacing operation of orifice plate is complex, expends substantial amounts of manpower and materials, adds the use cost of throttling arrangement.
Summary of the invention
It is an object of the invention to provide a kind of restricting orifice, it is to avoid cavitation phenomenons occurs on orifice plate, simplifies the replacing flow process of orifice plate simultaneously when safeguarding, reduce the use cost of throttling arrangement.
The purpose of the present invention is achieved through the following technical solutions:
A kind of restricting orifice, including two half shells, it is respectively arranged with ring flange at described half shell end face, two half shells connect and compose housing by ring flange, described housing inner peripheral wall is provided with sleeve pipe, secondary orifice plate it is provided with in the middle part of sleeve pipe, multiple primary orifice plates are evenly distributed on internal surface of sleeve pipe with secondary orifice plate for axis of symmetry, the end, two ends of described secondary orifice plate extends through the gap location between backward two ring flanges of sleeve pipe and extends, and is provided with sealing gasket on the two side, extension of described secondary orifice plate.During use, first the two ends of sleeve pipe are respectively placed in two half shells, until multiple primary orifice plates are evenly distributed on inside two half shells, and secondary orifice plate just connecting end surface to two half shells, and two extensions of secondary orifice plate are respectively placed between two ring flanges, on the two side of extension, lay sealing gasket simultaneously, then by bolt, two half shells are tightened together, the end face making two ring flanges relative is directly pressed on sealing gasket, to complete the sealing between sleeve pipe and housing；After a fluid stream is entered by one end of half shell, now it is fastened on ring flange due to two extensions of secondary orifice plate, the most whole sleeve pipe is fastened to enclosure interior, to ensure that sleeve pipe entirety keeps stable when being impacted by a fluid stream, and multiple primary orifice plates and secondary orifice plate all have multiple round hole, a fluid stream is through the blocking-up of round hole, its pressure declines, the energy of self starts to be lost step by step, until a fluid stream is after one by one by primary orifice plate or secondary orifice plate, the pressure being positioned at primary orifice plate or secondary orifice plate is not less than the saturated vapour pressure of liquid, to reduce the generation of cavitation phenomenons, primary orifice plate and the service life of secondary orifice plate in extending sleeve pipe.
Wherein, primary orifice plate, secondary orifice plate and sleeve pipe are overall structure, when safeguarding replacing, only need to open ring flange then can this overall structure be taken out in the lump, rather than in prior art, multiple orifice plates are fixed by multiple flanges and need repeated removal flange repeatedly when dismounting, and then reach the labor intensity reducing orifice plate when installing/dismounting.
Two end faces of described sleeve pipe are connected with sealing ring, and described sealing ring external diameter is more than the external diameter of described sleeve pipe.Owing to sleeve pipe is placed in inner walls, and between inner walls and sleeve pipe, there will be minimum gap, and a fluid stream of high-speed motion can be scurried in this gap, multiply adverse current is formed in housing, affect the normal motion of a fluid stream, and sleeve pipe and inner walls cause stress raisers through fierce washing away, and i.e. cause damage occur；And on two end faces of sleeve pipe, it is connected with sealing ring, and the external diameter of this sealing ring is more than the external diameter of sleeve pipe, when half shell put into by sleeve pipe, sealing ring moves on half shell inwall with cannula tip, sealing ring is compressed and is tightly fitted on half shell inwall simultaneously, to ensure the sealing between sleeve outer wall and half shell inwall.
The axial width of described secondary orifice plate is more than the axial width of described primary orifice plate.A fluid stream flows through secondary orifice plate after sequentially passing through multiple primary orifice plate, finally again through multiple primary orifice plates, and then the momentum making a fluid stream self possess is exhausted, and during a fluid stream moves, the several primary orifice plate contacted at first with a fluid stream is impaired the most serious, and when a fluid stream moves to secondary orifice plate, the impact strength of the secondary orifice plate that axial width is relatively large is greater than primary orifice plate, i.e. can guarantee that sleeve pipe to continue in housing to use, and impaired relatively small residue several primary orifice plate, can be by releasing ring flange, by remaining several primary orifice plates and impaired serious primary orifice plate reversing of position, to extend the service life of sleeve pipe, reduce the use cost of throttling arrangement.
The present invention compared with prior art, has such advantages as and beneficial effect:
1, the primary orifice plate of the present invention, secondary orifice plate and sleeve pipe are overall structure, when safeguarding replacing, only need to open ring flange then can this overall structure be taken out in the lump, rather than in prior art, multiple orifice plates are fixed by multiple flanges and need repeated removal flange repeatedly when dismounting, and then reach the labor intensity reducing orifice plate when installing/dismounting；
2, the present invention is connected with sealing ring on two end faces of sleeve pipe, and the external diameter of this sealing ring is more than the external diameter of sleeve pipe, when half shell put into by sleeve pipe, sealing ring moves on half shell inwall with cannula tip, sealing ring is compressed and is tightly fitted on half shell inwall simultaneously, to ensure the sealing between sleeve outer wall and half shell inwall；
3, the present invention is when a fluid stream moves to secondary orifice plate, the impact strength of the secondary orifice plate that axial width is relatively large is greater than primary orifice plate, i.e. can guarantee that sleeve pipe to continue in housing to use, and impaired relatively small residue several primary orifice plate, can be by releasing ring flange, by remaining several primary orifice plates and impaired serious primary orifice plate reversing of position, to extend the service life of sleeve pipe, reduce the use cost of throttling arrangement.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes the part of the application, is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is present configuration schematic diagram；
Labelling and corresponding parts title in accompanying drawing:
1-sealing ring, 2-sleeve pipe, 3-primary orifice plate, 4-level orifice plate, 5-half shell, 6-ring flange, 7-sealing gasket.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, not as a limitation of the invention.
Embodiment 1
As shown in Figure 1, the present embodiment includes two half shells 5, it is respectively arranged with ring flange 6 at described half shell 5 end face, two half shells 5 connect and compose housing by ring flange 6, described housing inner peripheral wall is provided with sleeve pipe 2, secondary orifice plate 4 it is provided with in the middle part of sleeve pipe 2, multiple primary orifice plates 3 are evenly distributed on sleeve pipe 2 inwall with secondary orifice plate 4 for axis of symmetry, the end, two ends of described secondary orifice plate 4 extends through the gap location between backward two ring flanges 6 of sleeve pipe 2 and extends, and is provided with sealing gasket 7 on the two side, extension of described secondary orifice plate 4.
During use, first the two ends of sleeve pipe 2 are respectively placed in two half shells 5, until multiple primary orifice plates 3 are evenly distributed on two half shells 5 inside, and secondary orifice plate 4 just connecting end surface to two half shells 5, and two extensions of secondary orifice plate 4 are respectively placed between two ring flanges 6, on the two side of extension, lay sealing gasket 7 simultaneously, then by bolt, two half shells 5 are tightened together, the end face making two ring flanges 6 relative is directly pressed on sealing gasket 7, to complete the sealing between sleeve pipe 2 and housing；After a fluid stream is entered by one end of half shell 5, now it is fastened on ring flange 6 due to two extensions of secondary orifice plate 4, the most whole sleeve pipe 2 is fastened to enclosure interior, to ensure that the overall holding of sleeve pipe 2 is stable when being impacted by a fluid stream, and multiple primary orifice plates 3 and secondary orifice plate 4 all have multiple round hole, a fluid stream is through the blocking-up of round hole, its pressure declines, the energy of self starts to be lost step by step, until a fluid stream is after one by one by primary orifice plate 3 or secondary orifice plate 4, it is positioned at the pressure at primary orifice plate 3 or secondary orifice plate 4 and is not less than the saturated vapour pressure of liquid, to reduce the generation of cavitation phenomenons, primary orifice plate 3 and the service life of secondary orifice plate 4 in extending sleeve pipe 2.
Wherein, primary orifice plate 3, secondary orifice plate 4 and sleeve pipe 2 are overall structure, when safeguarding replacing, only need to open ring flange 6 then can this overall structure be taken out in the lump, rather than in prior art, multiple orifice plates are fixed by multiple flanges and need repeated removal flange repeatedly when dismounting, and then reach the labor intensity reducing orifice plate when installing/dismounting.
The present embodiment is connected with sealing ring 1 on 2 two end faces of described sleeve pipe, and described sealing ring 1 external diameter is more than the external diameter of described sleeve pipe 2.Owing to sleeve pipe 2 is placed in inner walls, and between inner walls and sleeve pipe 2, there will be minimum gap, and a fluid stream of high-speed motion can be scurried in this gap, multiply adverse current is formed in housing, affect the normal motion of a fluid stream, and sleeve pipe 2 and inner walls cause stress raisers through fierce washing away, and i.e. cause damage occur；And on two end faces of sleeve pipe 2, it is connected with sealing ring 1, and the external diameter of this sealing ring 1 is more than the external diameter of sleeve pipe 2, when half shell 5 put into by sleeve pipe 2, sealing ring 1 moves on half shell 5 inwall with sleeve pipe 2 end, sealing ring 1 is compressed and is tightly fitted on half shell 5 inwall simultaneously, to ensure the sealing between sleeve pipe 2 outer wall and half shell 5 inwall.
As preferably, the axial width of described secondary orifice plate 4 is more than the axial width of described primary orifice plate 3.A fluid stream flows through secondary orifice plate 4 after sequentially passing through multiple primary orifice plate 3, finally again through multiple primary orifice plates 3, and then the momentum making a fluid stream self possess is exhausted, and during a fluid stream moves, the several primary orifice plate 3 contacted at first with a fluid stream is impaired the most serious, and when a fluid stream moves to secondary orifice plate 4, the impact strength of the secondary orifice plate 4 that axial width is relatively large is greater than primary orifice plate 3, i.e. can guarantee that sleeve pipe 2 to continue in housing to use, and impaired relatively small residue several primary orifice plate 3, can be by releasing ring flange 6, by remaining several primary orifice plates 3 and impaired serious primary orifice plate 3 reversing of position, to extend the service life of sleeve pipe 2, reduce the use cost of throttling arrangement.
Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect are further described; it is it should be understood that; the foregoing is only the detailed description of the invention of the present invention; the protection domain being not intended to limit the present invention; all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.
Claims (3)
1. a restricting orifice, including two half shells (5), it is respectively arranged with ring flange (6) at described half shell (5) end face, two half shells (5) connect and compose housing by ring flange (6), it is characterized in that: sleeve pipe (2) is installed on described housing inner peripheral wall, sleeve pipe (2) middle part is provided with secondary orifice plate (4), multiple primary orifice plates (3) are that axis of symmetry is evenly distributed on sleeve pipe (2) inwall with secondary orifice plate (4), the end, two ends of described secondary orifice plate (4) extends through the gap location between backward two ring flanges (6) of sleeve pipe (2) and extends, and it is provided with sealing gasket (7) on the two side, extension of described secondary orifice plate (4).
A kind of restricting orifice the most according to claim 1, it is characterised in that: on (2) two end faces of described sleeve pipe, it is connected with sealing ring (1), and described sealing ring (1) external diameter is more than the external diameter of described sleeve pipe (2).
A kind of restricting orifice the most according to claim 1, it is characterised in that: the axial width of described secondary orifice plate (4) is more than the axial width of described primary orifice plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610371558.XA CN105840945A (en) | 2016-05-31 | 2016-05-31 | Throttle orifice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610371558.XA CN105840945A (en) | 2016-05-31 | 2016-05-31 | Throttle orifice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105840945A true CN105840945A (en) | 2016-08-10 |
Family
ID=56594927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610371558.XA Pending CN105840945A (en) | 2016-05-31 | 2016-05-31 | Throttle orifice |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105840945A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949333A (en) * | 2017-03-31 | 2017-07-14 | 中核核电运行管理有限公司 | A kind of ceramic chamber lining throttle orifice component of sherardizing steel |
| CN107559531A (en) * | 2017-10-27 | 2018-01-09 | 成都瞬科仪器仪表有限公司 | The restricting orifice remotely conveyed for gas field |
| CN107856565A (en) * | 2017-11-16 | 2018-03-30 | 黑冻科技有限公司 | A kind of combined air iron drive system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202733309U (en) * | 2012-07-25 | 2013-02-13 | 温州市达安仪表厂 | Multi-stage throttling orifice plate group |
| CN203273174U (en) * | 2013-06-03 | 2013-11-06 | 陕西渭河煤化工集团有限责任公司 | Multistage restriction orifice structure |
| CN203604902U (en) * | 2013-11-26 | 2014-05-21 | 江阴市宏达仪表有限公司 | Multi-stage perforated restriction orifice device |
| CN203784549U (en) * | 2013-09-27 | 2014-08-20 | 陕西渭河煤化工集团有限责任公司 | Multi-stage restriction orifice plate easy to detach, maintain and clean |
| US20150184806A1 (en) * | 2012-07-03 | 2015-07-02 | Caltec Limited | Apparatus and method for reducing the effect of joule-thomson cooling |
| CN105021239A (en) * | 2015-08-07 | 2015-11-04 | 成都国光电子仪表有限责任公司 | Clip type metering device |
| CN205745840U (en) * | 2016-05-31 | 2016-11-30 | 成都国光电子仪表有限责任公司 | A kind of porous type restricting orifice |
-
2016
- 2016-05-31 CN CN201610371558.XA patent/CN105840945A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150184806A1 (en) * | 2012-07-03 | 2015-07-02 | Caltec Limited | Apparatus and method for reducing the effect of joule-thomson cooling |
| CN202733309U (en) * | 2012-07-25 | 2013-02-13 | 温州市达安仪表厂 | Multi-stage throttling orifice plate group |
| CN203273174U (en) * | 2013-06-03 | 2013-11-06 | 陕西渭河煤化工集团有限责任公司 | Multistage restriction orifice structure |
| CN203784549U (en) * | 2013-09-27 | 2014-08-20 | 陕西渭河煤化工集团有限责任公司 | Multi-stage restriction orifice plate easy to detach, maintain and clean |
| CN203604902U (en) * | 2013-11-26 | 2014-05-21 | 江阴市宏达仪表有限公司 | Multi-stage perforated restriction orifice device |
| CN105021239A (en) * | 2015-08-07 | 2015-11-04 | 成都国光电子仪表有限责任公司 | Clip type metering device |
| CN205745840U (en) * | 2016-05-31 | 2016-11-30 | 成都国光电子仪表有限责任公司 | A kind of porous type restricting orifice |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949333A (en) * | 2017-03-31 | 2017-07-14 | 中核核电运行管理有限公司 | A kind of ceramic chamber lining throttle orifice component of sherardizing steel |
| CN107559531A (en) * | 2017-10-27 | 2018-01-09 | 成都瞬科仪器仪表有限公司 | The restricting orifice remotely conveyed for gas field |
| CN107856565A (en) * | 2017-11-16 | 2018-03-30 | 黑冻科技有限公司 | A kind of combined air iron drive system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160810 |
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| RJ01 | Rejection of invention patent application after publication |