CN101270813A - Ore pulp regulating valve - Google Patents
Ore pulp regulating valve Download PDFInfo
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- CN101270813A CN101270813A CNA2008100373783A CN200810037378A CN101270813A CN 101270813 A CN101270813 A CN 101270813A CN A2008100373783 A CNA2008100373783 A CN A2008100373783A CN 200810037378 A CN200810037378 A CN 200810037378A CN 101270813 A CN101270813 A CN 101270813A
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- valve
- valve pocket
- ore pulp
- valve chamber
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Abstract
The invention belongs to a valve. A pulp regulating valve includes a valve body, a valve seat and a valve core, which is characterized in that the valve chamber of the valve body is a mushroom-shaped segment ball valve chamber. The valve seat is arranged at the segment center of the segment ball valve chamber. The exit of the valve chamber is arranged at one side of the segment ball valve. The central line of the segment ball valve parallel to the bottom plane of the segment ball valve chamber accords with the central line of the exit of the valve chamber. The spherical diameter of the valve chamber is: D is equal to Psi Rho {8 [(f *d)<2>-H<2>]}1/2. In the formula, Psi Rho is a modified coefficient, considering the effect of the pressure difference. When the Reynolds number Red is more than or equal to 1000 and is less than 2300, Psi Rho is equal to 1. When the Reynolds number Red is less than 1000, Psi Rho is between 1.1 and 1.4. d is the nominal diameter of the valve body. f is the minimum fixing dimension coefficient of the valve seat and is between 1.13 and 1.16. H is the interception height of the valve chamber, normally equal to d/2. The invention solves the technical problems of the even distribution of the pulp flowing through the regulating valve at the exit of the valve chamber and the laminar flow at the axial direction of an exit pipe in order to reduce the erosion degree of the pulp upon the regulating valve.
Description
Technical field:
The invention belongs to valve, particularly about a kind of ore pulp regulating valve that is used in the ore pulp spontaneous evaporation system as throttling arrangement.
Background technique:
Mining activities enterprise, especially alumina producing industry, the throttling arrangement in its ore pulp spontaneous evaporation system, it is at present domestic that what generally use is outlet regulating type valve or jar integral orifice attachment.These two kinds traditional throttling arrangements that are used in the ore pulp spontaneous evaporation system, the valve pocket of orifice plate or modulating valve and the flow rate of pulp height in valve pocket outlet port owing to flow through, be turbulent condition, the initiation that this is serious the erosion of ore pulp to modulating valve, not only make spool, sealing surface of seat bad sealing, regulatory function is reduced gradually, and the replacing of maintenance and part is quite frequent, system's effective operation time is subjected to considerable influence.Everything has caused the rising of system job operating cost.
Summary of the invention:
The object of the present invention is to provide a kind of ore pulp regulating valve, the ore pulp that solves the modulating valve of flowing through is flow velocity evenly distributes, flow velocity is listed mouthful tube axial direction laminar flow to reduce the technical problem of ore pulp to the erosion degree of modulating valve in the valve pocket outlet port.
The technological scheme that the present invention solves the problems of the technologies described above is:
A kind of ore pulp regulating valve, comprise valve body, valve seat and spool, it is characterized in that: the valve pocket of this valve body is the intercept sphere valve pocket of mushroom-like, valve seat is positioned at the center, bottom section of this intercept sphere valve pocket, the outlet of valve pocket is positioned at this intercept sphere one side, the intercept sphere center line that is parallel to intercept sphere valve pocket bottom section is consistent with the center line of valve pocket outlet, and the diameter of this valve pocket is:
D＝Ψρ{8[(f×d)
2-H
2]}
1/2
In the formula: Ψ ρ is for considering the correction factor of pressure reduction influence, when reynolds number Re d 〉=1000 and＜2300 the time, Ψ ρ=1; When reynolds number Re d＜1000, Ψ ρ=1.1～1.4;
F is the minimum installation dimension coefficient of valve seat, is 1.13～1.16;
D is the valve nominal diameter;
H is valve pocket intercepting height, H=d/2 usually.
Technological scheme of the present invention also further is: the sealing surfaces surfacing or the plating of spool and valve seat have Ni-based carbide or cemented carbide.
Further, the valve pocket inwall is coated with carbide or ceramic coating with the valve stem part surface that contacts with flowing medium.
The present invention has following beneficial effect:
Because the cylindrical valve pocket that will have modulating valve commonly used on the ore pulp evaporating system now is changed into the intercept sphere valve pocket of mushroom-like, and the relation of definite valve pocket diameter and outlet diameter, make modulating valve of the present invention under various apertures of valve and operating mode pressure reduction condition, the velocity field of the valve pocket outlet that produces Peak Flow Rate is evenly distributed, and it is laminar motion that a fluid stream is listed mouthful tube axial direction, has greatly slowed down the erosion effect of ore pulp to valve.The sealing surfaces of spool, valve seat, valve pocket inwall and stem surface are provided with the protective layer of anti-ore pulp erosion or abrasion in addition.Make erosion, the abrasive acrion of ore pulp reduce to minimum degree, the frequent maintenance of modulating valve in the past and the replacing present situation of component have been changed, not only improved the stream time of ore pulp evaporating system, and saved cost of production, in 1,000,000 tons/year productivity, only this item just can be economized on the use of funds more than ten million yuan.
Description of drawings:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is a fluid flow state schematic representation of the present invention.
Embodiment:
See also shown in Figure 1ly, ore pulp regulating valve of the present invention comprises valve body 1, valve seat 4 and spool 6.It is that the D intercepting highly is the intercept sphere valve pocket 7 of H that this valve body 1 has a diameter, and the import 5 of modulating valve vertically protrudes in valve body 1 base plane, make whole valve body 1 be rendered as a mushroom object of being with umbrella handle, and its outlet 2 is offset to this intercept sphere valve pocket 7 one sides.This valve seat 4 is positioned at the valve seat orifice of intercept sphere valve pocket bottom section 3, and communicates with import 5; The spool 6 that forms the relation of keying with valve seat 4 is driven valve or is closed valve by the lifting gear (not shown) that is positioned at valve body 1 outer top by the valve rod 8 that links to each other.Import 5, valve seat 4, spool 5 and valve rod 8 have same shaft axis, and this shaft axis is consistent with the vertical center line Y-Y of this intercept sphere valve pocket 7; The horizontal center line X-X of this intercept sphere valve pocket 7 is consistent with the runner center line of outlet 2, and promptly this intercept sphere bottom section 3 is in the same plane with the runner lowest part of outlet 2, that is to say that the intercepting height H is 1/2 of outlet 2 diameter d (claiming the valve nominal diameter again).
From the fluid flow state figure of Fig. 2 as can be seen, under the constant situation of flow, the velocity field that the size of intercept sphere valve pocket 2 influences the chamber inner fluid distributes and Flow Field Distribution, and the cavity size near the recirculating zone of the approach section part of valve seat 4, vortex and the top contiguous outlet 2 relative with outlet 2 intercept sphere valve pocket 7 in is to determine that the flow velocity that exports 2 places evenly distributes, a fluid stream is listed the key that mouthful tube axial direction is laminar motion.According to reynolds experiment, when the reynolds number Re d≤Rec2300 (transition reynolds number) of outlet 2 runner sections, this fluid that exports 2 section parts flows and is laminar condition.Therefore the pass of the sphere diameter D of intercept sphere valve pocket 7 of the present invention and intercepting height H is:
D＝Ψρ{8[(f×d)
2-H
2]}
1/2；
When intercepting height H=d/2, intercept sphere diameter D also can be determined by following relationship:
D＝Ψρ{8[(f×d)
2-(d/2)
2]}
1/2
In the formula: Ψ ρ is the pressure reduction correction factor, when reynolds number Re d 〉=1000 of outlet 2 sections and＜2300 the time, Ψ ρ=1; When this reynolds number Re d＜1000, Ψ ρ=1.1～1.4;
F is the minimum coefficient of installing of valve seat, is 1.13～1.16.
When the ore pulp of fluid with V
1Flow velocity enter intercept sphere valve pocket 7 after because the expansion of cavity, the sectional area at the diameter place of its cavity is very greater than the sectional area of import 5, the velocity head hm ≈ V in the cavity
1 2/ 2g, promptly the velocity head of fluid all dissipates in intercept sphere valve pocket 7, has reduced ore pulp washing away intercept sphere valve pocket 7, spool 6 and valve rod 8.Simultaneously, ore pulp flows out from exporting 2 with laminar condition, greatly reduces ore pulp to exporting the erosion at 2 places.
Be the erosion to valve seat 4, spool 5 sealing positions of the ore pulp that reduces high flow rate, the present invention takes Ni-based carbide of above-mentioned sealing position surfacing or cemented carbide.Be further to reduce the abrasion of ore pulp to intercept sphere valve pocket 7 inwalls simultaneously, the present invention is to inner-wall spraying or the coated carbide or the ceramic coating of this intercept sphere valve pocket 7, to reach the abrasion that prevents the cavity body material.
Claims (3)
1, a kind of ore pulp regulating valve, comprise valve body, valve seat and spool, it is characterized in that: the valve pocket of this valve body is section body ball valve chamber of mushroom-like, valve seat is positioned at the section center of this intercept sphere valve pocket, the outlet of valve pocket is positioned at this intercept sphere one side, the intercept sphere center line that is parallel to intercept sphere valve pocket base plane is consistent with the center line of valve pocket outlet, and the spherical diameter of this valve pocket is: D=Ψ ρ 8[(f * d)
2-H
2]
1/2In the formula: Ψ ρ is for considering the correction factor of pressure reduction influence, when reynolds number Re d 〉=1000 and＜2300 the time, Ψ ρ=1; When reynolds number Re d＜1000, Ψ ρ=1.1～1.4; F is the minimum installation dimension coefficient of valve seat, is 1.13～1.16; D is the valve nominal diameter; H is valve pocket intercepting height, H=d/2 usually.
2, ore pulp regulating valve according to claim 1 is characterized in that: the sealing surfaces surfacing or the plating of spool and valve seat have Ni-based carbide or cemented carbide.
3, ore pulp regulating valve according to claim 1 and 2 is characterized in that: the valve pocket inwall is coated with carbide or ceramic coating with the valve stem part surface that contacts with flowing medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810037378A CN100591958C (en) | 2008-05-14 | 2008-05-14 | Ore pulp regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810037378A CN100591958C (en) | 2008-05-14 | 2008-05-14 | Ore pulp regulating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101270813A true CN101270813A (en) | 2008-09-24 |
| CN100591958C CN100591958C (en) | 2010-02-24 |
Family
ID=40004965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810037378A Expired - Fee Related CN100591958C (en) | 2008-05-14 | 2008-05-14 | Ore pulp regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100591958C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103118795A (en) * | 2010-11-03 | 2013-05-22 | Abb株式会社 | Paint filling device for cartridge and paint filling method for cartridge |
| CN113309490A (en) * | 2021-07-06 | 2021-08-27 | 成都百胜野牛科技有限公司 | Erosion-resisting structure of intelligent flow regulator of natural gas well |
| CN114072608A (en) * | 2019-07-12 | 2022-02-18 | Ksb股份有限公司 | Pipe joint device |
-
2008
- 2008-05-14 CN CN200810037378A patent/CN100591958C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103118795A (en) * | 2010-11-03 | 2013-05-22 | Abb株式会社 | Paint filling device for cartridge and paint filling method for cartridge |
| CN114072608A (en) * | 2019-07-12 | 2022-02-18 | Ksb股份有限公司 | Pipe joint device |
| CN113309490A (en) * | 2021-07-06 | 2021-08-27 | 成都百胜野牛科技有限公司 | Erosion-resisting structure of intelligent flow regulator of natural gas well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100591958C (en) | 2010-02-24 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100224 Termination date: 20110514 |