CN105841758A - Multistage pressure-reducing throttle orifice plate - Google Patents
Multistage pressure-reducing throttle orifice plate Download PDFInfo
- Publication number
- CN105841758A CN105841758A CN201610371557.5A CN201610371557A CN105841758A CN 105841758 A CN105841758 A CN 105841758A CN 201610371557 A CN201610371557 A CN 201610371557A CN 105841758 A CN105841758 A CN 105841758A
- Authority
- CN
- China
- Prior art keywords
- orifice plate
- sleeve pipe
- expanding reach
- secondary orifice
- fluid stream
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/42—Orifices or nozzles
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a multistage pressure-reducing throttle orifice plate. The multistage pressure-reducing throttle orifice plate comprises two half shell bodies, wherein the two half shell bodies are connected by flange plates to form a shell, a sleeve is mounted on the inner circumferential wall of the shell, a secondary orifice plate is arranged at the middle part of the sleeve, multiple primary orifice plates are uniformly distributed on the inner wall of the sleeve by utilizing the secondary orifice plate as a symmetry axis, the end parts of the two ends of the secondary orifice plate extend to intervals inbetween the two flange plates after respectively penetrating through the sleeve, and sealing gaskets are arranged on the two side walls of extension sections of the secondary orifice plate. The secondary orifice plate faces to connection end faces of the two half shell bodies, and the two extension sections of the secondary orifice plate are respectively arranged between the two flange plates; and meanwhile, the sealing gaskets are paved on the two side walls of the extension sections, and the two half shell bodies are fastened together by bolts, so that the opposite end faces of the two flange plates are directly tightly pressed on the sealing gaskets to complete sealing between the sleeve and the shell.
Description
Technical field
The present invention relates to flow transducer field, specifically refer to multi-stag blood pressure lowering 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 multi-stag blood pressure lowering 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:
Multi-stag blood pressure lowering 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；Multiple perforates being arranged on described primary orifice plate include the first expanding reach, flat segments and the second expanding reach being sequentially connected with along a fluid stream direction of motion, described first expanding reach, the internal diameter of the second expanding reach are all incremented by along a fluid stream direction of motion, and the axial length of described first expanding reach is less than the axial length of the second expanding reach.
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.And 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.
Wherein, perforate on primary orifice plate includes three parts, i.e. first expanding reach, flat segments and the second expanding reach, the internal diameter of the first expanding reach and the second expanding reach being axially incremented by along perforate, the internal diameter of flat segments then keeps constant, i.e. at a fluid stream through the first expanding reach, its flow area constantly increases, the flow velocity making fluid reduces, pressure owing to initially bringing out at the first expanding reach is maximum, the fluid velocity flowed into by this initial end is maximum, and the fluid velocity that moves along the first expanding reach inwall is relatively small, in the middle part of now then being formed in the first expanding reach, flow velocity is fast, the transition flow regime that surrounding flow velocity is slow, and relatively and for the laminar condition of fluid, the transition flow regime of fluid makes to interfere between each water layer, consume self-contained kinetic energy, i.e. it is gradually lowered the pressure of fluid；After fluid flows into flat segments, make the kinestate between each water layer the most steady, can avoid fluid, along flat segments axis direction generation component velocity, primary orifice plate is being caused certain impact, and after a fluid stream enters the second expanding reach, its running status is similar in the first expanding reach, difference is that a fluid stream self-energy now is the weakest, and the axial length of the second expanding reach is more than the axial length of the first expanding reach, and then increases the attenuation rate of a fluid stream energy；I.e. by the decay step by step of three semiconvection speed energy in perforate, the impact strength formed when a fluid stream is in direct-injection to next primary orifice plate is substantially reduced, and i.e. reduces the bearing load of primary orifice plate.
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 and use.
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, and 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 and uses.
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；
Fig. 2 is the structural representation of perforate.
Labelling and corresponding parts title in accompanying drawing:
1-sealing ring, 2-sleeve pipe, 3-primary orifice plate, 31-the first expanding reach, 32-flat segments, 33-the second expanding reach, 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 depicted in figs. 1 and 2, 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；Multiple perforates being arranged on described primary orifice plate 3 include the first expanding reach 31, flat segments 32 and the second expanding reach 33 being sequentially connected with along a fluid stream direction of motion, the internal diameter of described first expanding reach the 31, second expanding reach 33 is all incremented by along a fluid stream direction of motion, and the axial length of described first expanding reach 31 is less than the axial length of the second expanding reach 33.
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.And 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.
nullWherein，Perforate on primary orifice plate 3 includes three parts，I.e. first expanding reach 31、Flat segments 32 and the second expanding reach 33，The internal diameter of the first expanding reach 31 and the second expanding reach 33 being axially incremented by along perforate，The internal diameter of flat segments 32 then keeps constant，I.e. a fluid stream through the first expanding reach 31 time，Its flow area constantly increases，The flow velocity making fluid reduces，Pressure owing to initially bringing out at the first expanding reach 31 is maximum，The fluid velocity flowed into by this initial end is maximum，And the fluid velocity that moves along the first expanding reach 31 inwall is relatively small，In the middle part of now then being formed in the first expanding reach 31, flow velocity is fast、The transition flow regime that surrounding flow velocity is slow，And relatively and for the laminar condition of fluid，The transition flow regime of fluid makes to interfere between each water layer，Consume self-contained kinetic energy，I.e. it is gradually lowered the pressure of fluid；After fluid flows into flat segments 32, make the kinestate between each water layer the most steady, can avoid fluid, along flat segments 32 axis direction generation component velocity, primary orifice plate is being caused certain impact, and after a fluid stream enters the second expanding reach 33, its running status is similar in the first expanding reach 31, difference is that a fluid stream self-energy now is the weakest, and the axial length of the second expanding reach 33 is more than the axial length of the first expanding reach 31, and then increases the attenuation rate of a fluid stream energy；I.e. by the decay step by step of three semiconvection speed energy in perforate, the impact strength formed when a fluid stream is in direct-injection to next primary orifice plate 3 is substantially reduced, and i.e. reduces the bearing load of primary orifice plate 3.
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 and use.
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. multi-stag blood pressure lowering 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)；Multiple perforates being arranged on described primary orifice plate (3) include the first expanding reach (31), flat segments (32) and the second expanding reach (33) being sequentially connected with along a fluid stream direction of motion, described first expanding reach (31), the internal diameter of the second expanding reach (33) are all incremented by along a fluid stream direction of motion, and the axial length of described first expanding reach (31) is less than the axial length of the second expanding reach (33).
Multi-stag blood pressure lowering 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).
Multi-stag blood pressure lowering 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 |
|---|---|---|---|
| CN201610371557.5A CN105841758A (en) | 2016-05-31 | 2016-05-31 | Multistage pressure-reducing throttle orifice plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610371557.5A CN105841758A (en) | 2016-05-31 | 2016-05-31 | Multistage pressure-reducing throttle orifice plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105841758A true CN105841758A (en) | 2016-08-10 |
Family
ID=56594965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610371557.5A Withdrawn CN105841758A (en) | 2016-05-31 | 2016-05-31 | Multistage pressure-reducing throttle orifice plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105841758A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606374A (en) * | 2017-10-30 | 2018-01-19 | 成都瞬科仪器仪表有限公司 | A kind of restricting orifice of achievable multi-stag decompression |
| CN108194821A (en) * | 2018-01-02 | 2018-06-22 | 武汉都市环保工程技术股份有限公司 | Garbage incinerating power plant high pressure draining system |
-
2016
- 2016-05-31 CN CN201610371557.5A patent/CN105841758A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606374A (en) * | 2017-10-30 | 2018-01-19 | 成都瞬科仪器仪表有限公司 | A kind of restricting orifice of achievable multi-stag decompression |
| CN108194821A (en) * | 2018-01-02 | 2018-06-22 | 武汉都市环保工程技术股份有限公司 | Garbage incinerating power plant high pressure draining system |
| CN108194821B (en) * | 2018-01-02 | 2024-03-26 | 中冶南方都市环保工程技术股份有限公司 | High-pressure drainage system of garbage incineration power plant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107742039A (en) | A kind of Submarine Pipeline Design method based on suspended span vortex-induced vibration fatigue life | |
| CN105841758A (en) | Multistage pressure-reducing throttle orifice plate | |
| CN105840945A (en) | Throttle orifice | |
| CN103104646B (en) | Clamp type damper capable of controlling multi-dimensional vibration of tubular structure | |
| CN210440743U (en) | Thread engagement flange | |
| CN110056737B (en) | Honeycomb rubber lining type pressure pulsation attenuator | |
| CN107606374A (en) | A kind of restricting orifice of achievable multi-stag decompression | |
| CN205679276U (en) | A kind of throttle orifice plate apparatus | |
| CN102359690B (en) | Safety anti-explosion self-sealing rotary compensator | |
| CN105909911A (en) | Pipeline pressure fluctuation damping device | |
| CN106092223A (en) | A kind of orifice throttle structure | |
| CN205745840U (en) | A kind of porous type restricting orifice | |
| CN205679277U (en) | A kind of multilevel decompression orifice plate | |
| CN109027425B (en) | High-damping alloy metamaterial pipeline vibration and noise reduction device | |
| CN203431406U (en) | Restriction orifice | |
| CN107796447A (en) | A kind of orifice throttle structure | |
| CN202383056U (en) | High pressure and corrosion resistance probe installation device | |
| Jia et al. | Attenuation of gas pulsation in the valve chamber of a reciprocating compressor using the Helmholtz resonator | |
| CN107763359A (en) | A kind of throttle orifice plate apparatus | |
| CN209925846U (en) | High combination compensation arrangement of security | |
| CN211117948U (en) | Water-impact-resistant constant flow valve | |
| CN201034449Y (en) | Sealing structure for clad steel plate air cooler bobbin carriage | |
| CN205640016U (en) | Universal pressure balance type metal expansion joint | |
| CN202266773U (en) | Split rotary joint of multi-spring structure | |
| CN203395484U (en) | Metal corrugated water hammer eliminator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20160810 |