CN204739235U - Low pressure bypass valve of sealed face of protection case - Google Patents
Low pressure bypass valve of sealed face of protection case Download PDFInfo
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- CN204739235U CN204739235U CN201520369458.4U CN201520369458U CN204739235U CN 204739235 U CN204739235 U CN 204739235U CN 201520369458 U CN201520369458 U CN 201520369458U CN 204739235 U CN204739235 U CN 204739235U
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- low pressure
- valve
- guard ring
- spool
- pressure bypass
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Abstract
The utility model discloses a low pressure bypass valve of sealed face of protection case belongs to low pressure bypass valve technical field. The utility model discloses a disk seat, case, flow sleeve and guard ring are equipped with the valve seat seal face on the disk seat, be equipped with the sealed face of case on the case, and low pressure by -pass valve gate open is crossed the contact of valve seat seal face and the sealed face of case and is closed, the case outside is equipped with the flow sleeve, and the telescopic bottom of this flow is fixed on the disk seat, department on the case is fixed to the guard ring upper end, and guard ring downwardly extending covers the outside of case side, guard ring the first half is solid construction, and the equidistant orifice that is equipped with of guard ring the latter half, above -mentioned orifice are just to the case side, the lower extreme of case side is equipped with the annular arch, is equipped with the annular groove that agrees with mutually with the annular arch on the disk seat, and the annular that the annular groove holds when low pressure bypass valve is closed is protruding. The utility model discloses a thereby effectively protect the sealed face of case to avoid the function that the valve leaked.
Description
Technical field
The utility model relates to low pressure bypass valve arrangement technical field, more particularly, relates to a kind of low pressure bypass valve arrangement protecting valve core sealed cover.
Background technique
In order to coordinator stove runs, improve the characteristic of on-load under the different operating conditions of complete machine starting condition and unit, adapt to fast lifting load, strengthen the flexibility of unit, every platform steam turbine set all arranges a set of turbine bypass system.High pressure turbine by picks out from main steam house steward before steam turbine entrance, after decompression, desuperheat, be connected to reheating (cold section) steam line, and the cooling water of high pressure turbine by takes from the water supply system before economizer import isolating door.The every platform units' installation two of low voltage bypass overlaps, and before steam turbine intermediate pressure cylinder entrance, reheated steam supervisor picks out, after decompression, desuperheat, access vapour condenser.Cooling water takes from the condensate system of precision processing device of condensation water outlet.Hp and lp bypass comprises steam control valve, desuperheating spraying water valve, shut-off valve and control gear.
Open in machine process at unit, low voltage bypass participates in the adjustment of system pressure and temperature, and valve is in throttle, because initial parameters is lower, has a large amount of wet vapor to be directly flushed on spool.Due to vapor (steam) velocity very fast (reaching 100m/s), water vapour on spool washes away, spool is washed away very large (when in water vapour during the entrainment portions globule, spool is washed away more serious), often start shooting once just by valve erosion failure, after valve closing, formation is leaked.
In the applications such as power station, have a large amount of carbonated drink conveyance conduits, and be also provided with a large amount of valves.Ducted high hot water vapor is in transmitting procedure; can wash away valve formation and cause damage; therefore; must take measures to avoid directly washing away; especially the sealing surface in valve; the sealing of valve has come by valve core sealed cover and base seal face close contact, and valve opening fluid by time directly can wash away valve core sealed cover, therefore protect valve core sealed cover be valve protection a major issue.
In prior art, the existing related art scheme about protection valve core sealed cover is open, such as Chinese Patent Application No.: 2013201250768, the applying date: on March 19th, 2013, invention and created name is: a kind of valve mechanism preventing sealing surface from being washed away, this application case discloses a kind of valve mechanism preventing sealing surface from being washed away, spool is included in this valve mechanism, valve seat and flow sleeve, contacted by sealing surface when throttle down between spool and valve seat, flow sleeve is provided with in the outside of spool, the bottom of this flow sleeve is fixed on valve seat, spool is provided with the protective housing preventing fluid scouring valve core sealed cover, the outside of valve core sealed cover is located at by this protective housing, this protective housing is to cover the annular protrusion of valve core sealed cover to downward-extension, valve seat is provided with escape groove, escape groove is corresponding to annular protrusion to hold protective housing when valve body is closed.The valve mechanism of this application case can avoid the sealing surface of the direct washout valve core of carbonated drink, thus protection spool is not damaged, to improve its working life.But; also there is the following defect being difficult to overcome in this application case: although the setting of protective housing blocks carbonated drink; but but make the carbonated drink pressure around protective housing increase instantaneously; therefore in the opening process of valve; carbonated drink is inevasible after boosting around protective housing to be washed on valve core sealed cover; finally exacerbate washing away of valve core sealed cover on the contrary, so the valve mechanism of this application case is unsatisfactory for the practical function effect of protection spool.
In sum, the deficiency that when how to overcome existing valve opening, valve core sealed cover is damaged because washing away is an insoluble technical problem in prior art.
Valve sealing structure of the prior art as shown in Figure 1, according to the valve mechanism shown in Fig. 1, once can rough groove be there is on valve core sealed cover after being washed in sealing surface.Like this, when valve needs to close, due to the existence of groove, valve can be in leak condition all the time.What is more, and valve, once leak, can make leakage rate get more and more, greatly have influence on the closedown performance of valve under the pressure of medium.
Composition graphs 2, the low pressure bypass valve arrangement of the protection valve core sealed cover of the present embodiment, comprises valve seat 1, spool 2, flow sleeve 3 and guard ring 4.Valve seat 1 is provided with sealing surface of seat 101, and spool 2 is provided with valve core sealed cover 202, and low pressure bypass valve arrangement is closed with contacting of valve core sealed cover 202 by sealing surface of seat 101.Be provided with flow sleeve 3 outside spool 2, the bottom of this flow sleeve 3 is fixed on valve seat 1, and flow sleeve 3 is provided with metering orifice 301, and metering orifice 301 is arranged in the move distance of spool 2.Guard ring 4 is cylindric, and guard ring 4 upper end is fixed on spool 2 upper end, and guard ring 4 covers the outside of spool side 201 to downward-extension.Guard ring 4 upper half part is solid construction, and guard ring 4 lower half portion is equidistantly provided with throttle orifice 401, and the aperture of throttle orifice 401 is 2mm, and the distance between adjacent segments discharge orifice 401 is 1mm, and above-mentioned throttle orifice 401 is just to spool side 201.The lower end of spool side 201 is provided with annular protrusion 203, in order to not affect spool 2 and valve seat 1 closes, valve seat 1 is provided with the annular groove 102 agreed with mutually with annular protrusion 203, annular groove 102 holds annular protrusion 203 when low pressure bypass valve arrangement is closed, and the axial cross section of annular protrusion 203 and annular groove 102 is right-angled triangle.
The low pressure bypass valve arrangement of the protection valve core sealed cover of the present embodiment, guard ring 4 is provided with in the outside of spool side 201, and guard ring 4 lower half portion is equidistantly provided with throttle orifice 401, it has following effect: 1) setting of guard ring 4 can avoid carbonated drink direct washout valve seat sealing surface 101, valve core sealed cover 202 and spool side 201, serve protection sealing surface of seat 101, the effect of valve core sealed cover 202 and spool side 201, carbonated drink at a high speed is directly flushed on guard ring 4, even if guard ring 4 damages to some extent also can not affect valve seal effect, avoid valve leak, 2) throttle orifice 401 on guard ring 4 can make to be reduced by the carbonated drink pressure of guard ring 4, and carbonated drink pressure again by spool 2, substantially reduces it and washes away dynamics to spool 2, protect valve core structure after reducing, 3) can also filter out some oarse-grained impurity by throttle orifice 401, avoid the generation of valve blockage situation, reduction spool 2 is subject to the probability that impurity washes away.
The low pressure bypass valve arrangement of the protection valve core sealed cover of the present embodiment; the lower end of spool side 201 is provided with annular protrusion 203; valve seat 1 is provided with the annular groove 102 agreed with mutually with annular protrusion 203; by the stop of annular protrusion 203; avoid standard-sized sheet further or micro-ly open the carbonated drink that state lower valve core sealing surface 202 is subject to and directly wash away; block impurity washing away valve core sealed cover 202 simultaneously, effectively protect valve core sealed cover 202.
The low pressure bypass valve arrangement of the protection valve core sealed cover of the present embodiment; be provided with flow sleeve 3 outside spool 2, flow sleeve 3 is provided with metering orifice 301, and outside carbonated drink at a high speed is first entered in valve by metering orifice 301 again; alleviate the strength that carbonated drink is washed away, protect spool.
Model utility content
1. the model utility technical problem that will solve
The deficiency that when the purpose of this utility model is to overcome existing valve opening, valve core sealed cover is damaged because washing away, provides a kind of low pressure bypass valve arrangement protecting valve core sealed cover, achieves available protecting valve core sealed cover thus avoids the function of valve leak.
2. technological scheme
For achieving the above object, the technological scheme that the utility model provides is:
The low pressure bypass valve arrangement of protection valve core sealed cover of the present utility model, comprise valve seat, spool, flow sleeve and guard ring, described valve seat is provided with sealing surface of seat, and spool is provided with valve core sealed cover, and low pressure bypass valve arrangement is closed with contacting of valve core sealed cover by sealing surface of seat; Be provided with flow sleeve outside described spool, the bottom of this flow sleeve is fixed on valve seat;
Described guard ring upper end is fixed on spool upper end, and guard ring covers the outside of spool side to downward-extension; Guard ring upper half part is solid construction, and guard ring lower half portion is equidistantly provided with throttle orifice, and above-mentioned throttle orifice is just to spool side;
The lower end of described spool side is provided with annular protrusion, and valve seat is provided with the annular groove agreed with mutually with annular protrusion, the annular protrusion described in annular groove holds when low pressure bypass valve arrangement is closed.
Further improve as the utility model, described guard ring is cylindric.
Further improve as the utility model, the axial cross section of described annular protrusion and annular groove is right-angled triangle.
Further improve as the utility model, the distance between adjacent segments discharge orifice is 1 ~ 2mm.
Further improve as the utility model, the aperture of described throttle orifice is 2mm.
Further improve as the utility model, described flow sleeve is provided with metering orifice, and metering orifice is arranged in the move distance of spool.
3. beneficial effect
The technological scheme adopting the utility model to provide, compared with prior art, has following beneficial effect:
(1) low pressure bypass valve arrangement of protection valve core sealed cover of the present utility model, guard ring is provided with in the outside of spool side, and guard ring lower half portion is equidistantly provided with throttle orifice, it has following effect: 1) setting of guard ring can avoid carbonated drink direct washout valve seat sealing surface, valve core sealed cover and spool side, serve the effect of protection sealing surface of seat, valve core sealed cover and spool side, carbonated drink at a high speed is directly flushed on guard ring, even if guard ring damages to some extent also can not affect valve seal effect, avoid valve leak; 2) throttle orifice on guard ring can make to be reduced by the carbonated drink pressure of guard ring, and carbonated drink pressure again by spool, substantially reduces it and washes away dynamics to spool, protect valve core structure after reducing; 3) can also filter out some oarse-grained impurity by throttle orifice, avoid the generation of valve blockage situation, reduction spool is subject to the probability that impurity washes away.
(2) low pressure bypass valve arrangement of protection valve core sealed cover of the present utility model; the lower end of spool side is provided with annular protrusion; valve seat is provided with the annular groove agreed with mutually with annular protrusion; by the stop of annular protrusion; avoid standard-sized sheet further or micro-ly open the carbonated drink that state lower valve core sealing surface is subject to and directly wash away; block impurity washing away valve core sealed cover simultaneously, effectively protect valve core sealed cover.
(3) low pressure bypass valve arrangement of protection valve core sealed cover of the present utility model; be provided with flow sleeve outside spool, flow sleeve is provided with metering orifice, and outside carbonated drink at a high speed is first entered in valve by metering orifice again; alleviate the strength that carbonated drink is washed away, protect spool.
(4) low pressure bypass valve arrangement of protection valve core sealed cover of the present utility model, reasonable in design, principle is simple, is convenient to promote the use of.
Accompanying drawing explanation
Fig. 1 is the structural representation of valve in prior art.
Fig. 2 is the structural representation of the low pressure bypass valve arrangement of protection valve core sealed cover of the present utility model.
Label declaration in schematic diagram: 1, valve seat; 101, sealing surface of seat; 102, annular groove; 2, spool; 201, spool side; 202, valve core sealed cover; 203, annular protrusion; 3, flow sleeve; 301, metering orifice; 4, guard ring; 401, throttle orifice.
Embodiment
For understanding content of the present utility model further, in conjunction with the accompanying drawings and embodiments the utility model is described in detail.
Embodiment 1
Embodiment 2
The low pressure bypass valve arrangement of the protection valve core sealed cover of the present embodiment is substantially the same manner as Example 1, and its difference is: the distance between adjacent segments discharge orifice 401 is 2mm.
Schematically above be described the utility model and mode of execution thereof, this description does not have restricted, and also just one of the mode of execution of the present utility model shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the utility model and creating aim, design the mode of structure similar to this technological scheme and embodiment without creationary, protection domain of the present utility model all should be belonged to.
Claims (6)
1. protect the low pressure bypass valve arrangement of valve core sealed cover for one kind, comprise valve seat (1), spool (2) and flow sleeve (3), described valve seat (1) is provided with sealing surface of seat (101), spool (2) is provided with valve core sealed cover (202), and low pressure bypass valve arrangement is closed by sealing surface of seat (101) and contacting of valve core sealed cover (202); Described spool (2) outside is provided with flow sleeve (3), and the bottom of this flow sleeve (3) is fixed on valve seat (1); It is characterized in that: also comprise guard ring (4);
Described guard ring (4) upper end is fixed on spool (2) upper end, and guard ring (4) covers the outside of spool side (201) to downward-extension; Guard ring (4) upper half part is solid construction, and guard ring (4) lower half portion is equidistantly provided with throttle orifice (401), and above-mentioned throttle orifice (401) is just to spool side (201);
The lower end of described spool side (201) is provided with annular protrusion (203), valve seat (1) is provided with the annular groove (102) agreed with mutually with annular protrusion (203), the annular protrusion (203) described in annular groove (102) holds when low pressure bypass valve arrangement is closed.
2. the low pressure bypass valve arrangement of protection valve core sealed cover according to claim 1, is characterized in that: described guard ring (4) is for cylindric.
3. the low pressure bypass valve arrangement of protection valve core sealed cover according to claim 1, is characterized in that: the axial cross section of described annular protrusion (203) and annular groove (102) is right-angled triangle.
4. the low pressure bypass valve arrangement of protection valve core sealed cover according to claim 1, is characterized in that: the distance between adjacent segments discharge orifice (401) is 1 ~ 2mm.
5. the low pressure bypass valve arrangement of protection valve core sealed cover according to claim 1, is characterized in that: the aperture of described throttle orifice (401) is 2mm.
6. protect the low pressure bypass valve arrangement of valve core sealed cover according to claim 1 or 5; it is characterized in that: described flow sleeve (3) is provided with metering orifice (301), and metering orifice (301) is arranged in the move distance of spool (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520369458.4U CN204739235U (en) | 2015-05-29 | 2015-05-29 | Low pressure bypass valve of sealed face of protection case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520369458.4U CN204739235U (en) | 2015-05-29 | 2015-05-29 | Low pressure bypass valve of sealed face of protection case |
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| CN204739235U true CN204739235U (en) | 2015-11-04 |
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| CN201520369458.4U Active CN204739235U (en) | 2015-05-29 | 2015-05-29 | Low pressure bypass valve of sealed face of protection case |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090419A (en) * | 2016-08-23 | 2016-11-09 | 成都欧浦特控制阀门有限公司 | A kind of valve sealing structure of fluid erosion prevention |
| CN106499827A (en) * | 2016-11-22 | 2017-03-15 | 辽宁大唐国际锦州热电有限责任公司 | The low side valve of protection against erosion |
| WO2018058753A1 (en) * | 2016-09-29 | 2018-04-05 | 李岑文达 | Anti-erosion structure for valve sealing face |
| CN110608858A (en) * | 2019-09-04 | 2019-12-24 | 魏丽蓉 | Method for testing steam internal leakage of low-pressure bypass valve of thermal generator set |
| CN110805713A (en) * | 2019-11-26 | 2020-02-18 | 上海发电设备成套设计研究院有限责任公司 | Split type self preservation of governing valve protects sealed face structure |
-
2015
- 2015-05-29 CN CN201520369458.4U patent/CN204739235U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090419A (en) * | 2016-08-23 | 2016-11-09 | 成都欧浦特控制阀门有限公司 | A kind of valve sealing structure of fluid erosion prevention |
| WO2018058753A1 (en) * | 2016-09-29 | 2018-04-05 | 李岑文达 | Anti-erosion structure for valve sealing face |
| US10563785B2 (en) | 2016-09-29 | 2020-02-18 | Cenwenda LI | Erosion prevention structure for sealing surface of valve |
| CN106499827A (en) * | 2016-11-22 | 2017-03-15 | 辽宁大唐国际锦州热电有限责任公司 | The low side valve of protection against erosion |
| CN110608858A (en) * | 2019-09-04 | 2019-12-24 | 魏丽蓉 | Method for testing steam internal leakage of low-pressure bypass valve of thermal generator set |
| CN110608858B (en) * | 2019-09-04 | 2021-07-30 | 魏丽蓉 | Method for testing steam internal leakage of low-pressure bypass valve of thermal generator set |
| CN110805713A (en) * | 2019-11-26 | 2020-02-18 | 上海发电设备成套设计研究院有限责任公司 | Split type self preservation of governing valve protects sealed face structure |
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