CN101440887A - Pressure and temperature reducing valve - Google Patents
Pressure and temperature reducing valve Download PDFInfo
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- CN101440887A CN101440887A CNA2008101639996A CN200810163999A CN101440887A CN 101440887 A CN101440887 A CN 101440887A CN A2008101639996 A CNA2008101639996 A CN A2008101639996A CN 200810163999 A CN200810163999 A CN 200810163999A CN 101440887 A CN101440887 A CN 101440887A
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- steam
- valve
- flap
- sleeve
- guard
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Abstract
The invention relates to a pressure and temperature reducing valve, including a valve body, wherein a steam inlet and a steam outlet are arranged on. A steam regulating mechanism is provided in the valve. The steam regulating mechanism includes a valve seat and a sleeve piece. The valve seat is arranged on communication cavity between the steam inlet and the steam outlet which are on the valve body. A sleeve piece is connected with the supper end of the valve seat. A net cover is connected to the lower end of the valve seat. A flap matched with the sleeve piece is arranged inside. The steam inlet is communicated with the steam outlet by the via hole of the sleeve piece, the inner cavity of the sleeve piece, the inner cavity of the sleeve piece, the inner cavity of the valve seat, the inner cavity of the net cover and the orifice of the net cover. The upper end surface of the flap is connected with the valve stem which drives the flap moved up and down. Nozzles components are arranged at the lower end of the flap. A water supply pipe is built in the flap. One end of the water supply pipe is communicated with the water supply flange. The other end of the water supply pipe is communicated with the inner cavity of the net cover by the nozzle components. The invention provides effective pressure and temperature reducing control to the leakage rate, flow rate or the like in a large amplitude of variation.
Description
Technical field
The present invention relates to a kind of valve, more specifically say, it relates to a kind of steam converter valve.
Background technique
Steam converter valve is extensive in sector applications such as power plant, petrochemical industry, papermaking.Have function and effects such as steam decompression, desuperheat, automatic control and adjustment, satisfy the needs of user's steam process parameter.The steam converter valve of prior art is difficult to provide effective control to aspects such as the big leakage rate of excursion, flows, and desuperheat and the decompression that changes significantly can't be provided, and can not satisfy the variable working condition needs, directly influences the adjusting function of valve.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of steam converter valve that aspects such as the big leakage rate of amplitude of variation scope, flow is provided effective pressure and temperature reducing control control is provided.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions: this steam converter valve, comprise valve body, valve body is provided with steam inlet and steam (vapor) outlet, be provided with the steam controlling mechanism in the valve body, described steam controlling mechanism comprises valve seat and sleeve, steam inlet and steam (vapor) outlet that valve seat is arranged on the valve body are communicated with the cavity place, the upper end of valve seat is connected with sleeve, the lower end of valve seat is connected with guard, be provided with the flap that is mated in the sleeve, steam inlet is by the sleeve through hole on the sleeve, the inner chamber of sleeve, the inner chamber of valve seat, the inner chamber of guard, throttle orifice on the guard is connected with steam (vapor) outlet; The flap upper-end surface is connected with making its valve rod that moves up and down, and the flap lower end is provided with nozzle assembly, is provided with supply pipe in the flap, and an end of supply pipe is connected with the feedwater flange, and the other end of supply pipe is by the intracavity inter-connection of nozzle assembly and guard.
Described nozzle assembly comprises pedestal, umbrella shape sprinkler, connecting rod and spring seat, one end of connecting rod links to each other with the umbrella shape sprinkler, the other end of connecting rod is fixed together with spring seat after passing pedestal, spring seat, spring is arranged in the spring seat and is sleeved on the connecting rod, one end of spring and spring seat butt, the end face of the other end and pedestal connects, and supply pipe is connected with the umbrella shape sprinkler by the through hole on the pedestal.
Described guard is the guard that can freely stretch with temperature.
The bottom of described valve body is connected with bottom flange, and bottom flange is provided with drain port, is provided with nut in the drain port.
Described valve body is two spherical, two ball-type chambeies respectively corresponding steam inlet and steam (vapor) outlet institute to the position.
Because adopt technique scheme, steam converter valve provided by the invention has following improvement effect:
1. the integral structure finished in same valve body of pressure and temperature reducing can reduce the structure length of whole pressure and temperature reducing;
2. adopt sleeve and guard second depressurized structural type, both reduced the valve leak amount, increase the decompression amplitude, avoid valve interior wall directly to be subjected to spary again, prolong valve working life, reduce noise simultaneously, noise≤85dBA.
3. adopt the supply pipe that changes circulation area automatically to the temperature coarse adjustment, utilize nozzle that flap is provided with to the temperature fine tuning, make the cooling water jet velocity keep constant, utilize valve seat throat steam flow rate at a high speed simultaneously, improve atomizing, improve steam quality, satisfy the needs of big variable working condition, flow adjustment range can reach 5～100%;
4. the pressure and temperature reducing valve body adopts two spheries, can reduce alternating stress, and voltage endurance capability is strong, and is simple in structure, and volume is little, and is in light weight.
Description of drawings
Fig. 1 is an embodiment of the invention structural representation.
Fig. 2 is a nozzle assembly structural representation of the present invention.
Description of reference numerals: 1 steam inlet; 2 steam (vapor) outlets; 3 valve seats; 4 sleeves; 4-1 sleeve through hole; 5 flaps; 6 valve rods; 7 nozzle assemblies; The 7-1 pedestal; 7-2 umbrella shape sprinkler; The 7-3 connecting rod; The 7-4 spring seat; The 7-5 spring; The 7-6 through hole, 8 supply pipes; 9 guards; The 9-1 throttle orifice; 10 feedwater flanges; 11 drain ports; 12 bottom flanges, 13 valve bodies, 14 nuts.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.Though the present invention will be described in conjunction with preferred embodiment, should know, do not represent to limit the invention among the described embodiment.On the contrary, the present invention will be contained alternative, modified model and the equivalent in the scope of the present invention that can be included in attached claims qualification.
Referring to Fig. 1-2, the steam converter valve of Jie Shaoing generally is used for steam decompression desuperheat here, yet should know that the present invention also can be used for others.This steam converter valve, comprise valve body 13, valve body 13 is provided with steam inlet 1 and steam (vapor) outlet 2, be provided with the steam controlling mechanism in the valve body 13, described steam controlling mechanism comprises valve seat 3 and sleeve 4, and steam inlet 1 and steam (vapor) outlet 2 that valve seat 3 is arranged on the valve body 13 are communicated with the cavity place, and the upper end of valve seat 3 is connected with sleeve 4, the lower end of valve seat 3 is connected with guard 9, and guard 9 is the guard 9 that can freely stretch with temperature.Be provided with the flap 5 that is mated in the sleeve 4, steam inlet 1 is connected with steam (vapor) outlet 2 by the inner chamber of the sleeve through hole 4-1 on the sleeve 4, sleeve 4, the inner chamber of valve seat 3, the inner chamber of guard 9, the throttle orifice 9-1 on the guard 9; Flap 5 upper-end surfaces are connected with making its valve rod that moves up and down 6, flap 5 lower ends are provided with nozzle assembly 7, be provided with supply pipe 8 in the flap 5, an end of supply pipe 8 is connected with feedwater flange 10, and the other end of supply pipe 8 is by the intracavity inter-connection of nozzle assembly 7 with guard 9.Described nozzle assembly 7 comprises pedestal 7-1, umbrella shape sprinkler 7-2, connecting rod 7-3 and spring seat 7-4, the end of connecting rod 7-3 links to each other with umbrella shape sprinkler 7-2, the other end of connecting rod 7-3 is fixed together with spring seat 7-4 after passing pedestal 7-1, spring seat 7-4, spring 7-5 is arranged in the spring seat 7-4 and is sleeved on the connecting rod 7-3, the end of spring 7-5 and spring seat 7-4 butt, the end face of the other end and pedestal 7-1 connects, and supply pipe 8 is connected with umbrella shape sprinkler 7-2 by the through hole 7-6 on the pedestal 7-1.The bottom of described valve body 13 is connected with bottom flange 12, and bottom flange 12 is provided with drain port 11, is provided with nut 14 in the drain port 11; Described valve body 13 is two spherical, two ball-type chambeies respectively corresponding steam inlet 1 and steam (vapor) outlet 2 to the position.
The working principle of decompression part:, realize once reducing pressure thereby change the circulation area of steam by steam inlet 1 by moving up and down of flap 5.Steam is realized the secondary decompression by the throttle orifice 9-1 of guard 9.Valve seat 3 is designed to two-seat structure with the seal form of flap 5, both can reduce the unbalanced force of flap 5, can realize reliable sealing again.Sealing surface weld deposit stellite is high temperature resistant, anti-washing away and corrosion resistant high hardness cemented carbide, reduces leak-down rate, increases the service life.Sleeve 4 can be made various Flow characteristics structures, satisfies the requirement such as the different operating modes of Flow characteristicss such as linear LN, equal percentage EP% and parabola.The valve body cavity of resorption is provided with guard 9, guard 9 especially as an atomizing cavity, both strengthened cooling water atomizing effect, reduce noise, strengthen the decompression amplitude, avoid valve interior wall directly to be subjected to spary again, prolonged valve working life.
The working principle of desuperheat part: supply pipe 8 is made integral form with flap 5, can realize the coarse adjustment of desuperheat.The nozzle assembly 7 that utilizes flap 5 to be provided with carries out the thin tuning of desuperheat, and this structure can realize that the cooling water jet velocity keeps constant speed under different operating modes.Umbrella shape sprinkler 7-2 is located at valve seat 3 throats, can utilize throat's steam flow rate at a high speed, further improves atomizing, improves steam quality, satisfies the needs of big variable working condition.Flow adjustment range can reach 5%-100%.Cooling water through the flow rate calculation of umbrella shape sprinkler 7-2 is
G＝10
-6×f
pk×W
pk×γ
G in the formula-cooling water flow, kg/s
W
Pk-nozzle cooling water flow velocity, m/s
f
Pk-nozzle circulation area, m
2
γ-cooling water severe, kg/m
3
Said the relation between cooling water flow, flow velocity, the area in the formula.Because umbrella shape sprinkler 7-2 circulation area was along with increase when the cooling water flow increased; When the cooling water flow reduced, the effect of spring 7-5 pulling-down reduced umbrella shape sprinkler 7-2 circulation area thereupon.The cooling water jet velocity is constant like this, helps the cooling water atomizing effect, under the variable working condition condition, has improved the desuperheat performance.
The working principle of nozzle assembly 7: when steam flow increased, the cooling water requirement increased thereupon, and feed-regulating valve flap 5 promotes, and increases circulation area.The fluid resistance of modulating valve and pressure drop Δ PT descend thereupon.If feed water pump outlet pressure Pb, the pressure drop on the modulating valve is Δ PT, spray desuperheating place pressure P 2, and other valve and delivery (pipe) line system pressure drop are Δ Pc, umbrella shape sprinkler 7-2 pressure drop Δ Ppk then has:
ΔPpk＝Pb-ΔPc-ΔPT-P2，
Pb in the formula, Δ Pc, P2 are constant, because modulating valve pressure drop Δ PT improves, the feedwater flow velocity increases, and the cooling water flow increases.Simultaneously, after Δ Ppk increases.Cooling water improves umbrella shape sprinkler 7-2 active force, and umbrella shape sprinkler 7-2 is to bottom offset, and the annular circulation area of umbrella shape sprinkler 7-2 increases, nozzle assembly 7 constant flow rate then, and cooling water can fully atomize.Otherwise when steam flow reduced, the cooling water requirement reduced.Flap 5 is toward moving down, and circulation area reduces, and the pressure on the modulating valve falls Δ PT and rises, and umbrella shape sprinkler 7-2 pressure drop Δ Ppk reduces, and the feedwater flow velocity reduces, and confluent reduces thereupon, satisfies the desuperheat demand.Simultaneously, after Δ Ppk reduced, the active force that cooling water acts on the umbrella shape sprinkler 7-2 reduced, because the active force of spring 7-5 makes umbrella shape sprinkler 7-2 up move.The ring-like circulation area of umbrella shape sprinkler 7-2 reduces, and makes nozzle assembly 7 constant flow rate, and cooling water fully atomizes, and guarantees temperature lowering effect.
Claims (5)
1, a kind of steam converter valve, comprise valve body (13), valve body (13) is provided with steam inlet (1) and steam (vapor) outlet (2), valve body is provided with the steam controlling mechanism in (13), it is characterized in that: described steam controlling mechanism comprises valve seat (3) and sleeve (4), steam inlet (1) and steam (vapor) outlet (2) that valve seat (3) is arranged on the valve body (13) are communicated with the cavity place, the upper end of valve seat (3) is connected with sleeve (4), the lower end of valve seat (3) is connected with guard (9), be provided with the flap (5) that is mated in the sleeve (4), steam inlet (1) is by the sleeve through hole (4-1) on the sleeve (4), the inner chamber of sleeve (4), the inner chamber of valve seat (3), the inner chamber of guard (9), throttle orifice (9-1) on the guard (9) is connected with steam (vapor) outlet (2); Flap (5) upper-end surface is connected with making its valve rod that moves up and down (6), flap (5) lower end is provided with nozzle assembly (7), be provided with supply pipe (8) in the flap (5), one end of supply pipe (8) is connected with feedwater flange (10), and the other end of supply pipe (8) is by the intracavity inter-connection of nozzle assembly (7) with guard (9).
2, steam converter valve according to claim 1, it is characterized in that: described nozzle assembly (7) comprises pedestal (7-1), umbrella shape sprinkler (7-2), connecting rod (7-3) and spring seat (7-4), one end of connecting rod (7-3) links to each other with umbrella shape sprinkler (7-2), the other end of connecting rod (7-3) passes pedestal (7-1), spring seat (7-4) back is fixed together with spring seat (7-4), spring (7-5) is arranged in the spring seat (7-4) and is sleeved on the connecting rod (7-3), one end of spring (7-5) and spring seat (7-4) butt, the end face of the other end and pedestal (7-1) connects, and supply pipe (8) is connected with umbrella shape sprinkler (7-2) by the through hole (7-6) on the pedestal (7-1).
3, steam converter valve according to claim 1 is characterized in that: the guard (9) of described guard (9) for can freely stretching with temperature.
4, steam converter valve according to claim 1 is characterized in that: the bottom of described valve body (13) is connected with bottom flange (12), and bottom flange (12) is provided with drain port (11), is provided with nut (14) in the drain port (11).
5, according to claim 1 or 4 described steam converter valves, it is characterized in that: described valve body (13) is for two spherical, two ball-type chambeies respectively corresponding steam inlet (1) and steam (vapor) outlet (2) to the position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101639996A CN101440887A (en) | 2008-12-30 | 2008-12-30 | Pressure and temperature reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101639996A CN101440887A (en) | 2008-12-30 | 2008-12-30 | Pressure and temperature reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101440887A true CN101440887A (en) | 2009-05-27 |
Family
ID=40725439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101639996A Pending CN101440887A (en) | 2008-12-30 | 2008-12-30 | Pressure and temperature reducing valve |
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| CN (1) | CN101440887A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625116B (en) * | 2009-08-05 | 2011-04-06 | 无锡卓尔阀业有限公司 | High-temperature and high-pressure positive action desuperheater |
| CN103244751A (en) * | 2012-02-01 | 2013-08-14 | Vat控股公司 | Arrangement with at least one valve |
| CN104676060A (en) * | 2015-02-09 | 2015-06-03 | 温州市隆潮阀门有限公司 | Decompression non-return digital control valve |
| CN105387231A (en) * | 2015-12-09 | 2016-03-09 | 杭州东辰热力辅机有限公司 | Steam conversion valve |
| CN113700874A (en) * | 2021-08-31 | 2021-11-26 | 西安西热节能技术有限公司 | Automatic opening and closing flap device for adjusting local flow velocity of pipeline and working method thereof |
-
2008
- 2008-12-30 CN CNA2008101639996A patent/CN101440887A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625116B (en) * | 2009-08-05 | 2011-04-06 | 无锡卓尔阀业有限公司 | High-temperature and high-pressure positive action desuperheater |
| CN103244751A (en) * | 2012-02-01 | 2013-08-14 | Vat控股公司 | Arrangement with at least one valve |
| CN104676060A (en) * | 2015-02-09 | 2015-06-03 | 温州市隆潮阀门有限公司 | Decompression non-return digital control valve |
| CN104676060B (en) * | 2015-02-09 | 2018-05-29 | 温州市隆潮阀门有限公司 | Pressure reduction non-return digital control valve |
| CN105387231A (en) * | 2015-12-09 | 2016-03-09 | 杭州东辰热力辅机有限公司 | Steam conversion valve |
| CN113700874A (en) * | 2021-08-31 | 2021-11-26 | 西安西热节能技术有限公司 | Automatic opening and closing flap device for adjusting local flow velocity of pipeline and working method thereof |
| CN113700874B (en) * | 2021-08-31 | 2023-08-04 | 西安西热节能技术有限公司 | Automatic opening and closing flap device for adjusting local flow velocity of pipeline and working method of automatic opening and closing flap device |
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Open date: 20090527 |