CN102537647A - Antiscour draining valve - Google Patents
Antiscour draining valve Download PDFInfo
- Publication number
- CN102537647A CN102537647A CN2012100166582A CN201210016658A CN102537647A CN 102537647 A CN102537647 A CN 102537647A CN 2012100166582 A CN2012100166582 A CN 2012100166582A CN 201210016658 A CN201210016658 A CN 201210016658A CN 102537647 A CN102537647 A CN 102537647A
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- valve
- video disc
- hole
- partition wall
- antiscour
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Abstract
The invention discloses an antiscour draining valve. The antiscour draining valve is characterized in that a valve chamber is internally provided with a valve cage, the valve cage comprises at least one disc, the middle of the disc is provided with a through hole, and one side on the disc is provided with at least more than two circles of partition walls surrounding outside of the through hole; a channel is arranged between adjacent partition walls, a plurality of inlets is distributed on each partition wall, the quantity of inlets on the partition walls is equal, and inlets on the adjacent partition walls are mutually staggered; and the inlet on the partition wall of most outer ring of the dish piece is communicated with an inlet of a valve body, the through hole on the disc is communicated with a valve base, and the through hole on the disc is a channel of a valve clack sideslip valve base. According to the invention, an input media are subjected to pressure reduction through the diffluence pressure reduction action of the valve cage, the media after pressure reduction enters into a chamber in which the valve base and a valve clack are positioned, and the pressure is lower when the media contacts with the valve base and the valve clack; and working pressure of the valve base and the valve clack is effectively reduced, a sealing surface of the valve base and the valve clack is easy to damage, and the service life is long.
Description
Technical field
The present invention relates to a kind of valve.
Technical background
For a long time, the above thermal power generation unit of 300MW is in service, and the hydrophobic control of main steam line is a great problem always, and working life is generally at three months to 1 year, all can't reach usually the user to such valve working life in the requirement more than 4 years.Because there is " two high " problem (high temperature, high pressure) in the main steam drain valve in this system; Especially after and before the valve pressure reduction is big, flow velocity is fast; Upstream pressure reaches 20-30 MPa, and downstream pressure is zero pressure or negative pressure, can produce serious vapour to the drain valve of ordinary construction and wash away phenomenon.Next is that the booty that exists in the steam line all is to discharge through drain water piping, in water flows into drain valve, causes sealing surface the gap to occur, because medium temperature is high, pressure is big, the short time inner sealing surface will be washed out fully.And the main steam line drain valve is last one valve in the system, produces to leak directly to cause energy waste.
What at present, most of units used on this link mainly is the drain valve of common cut-off type and two kinds of structures of ball-valve type.
Common cut-off type drain valve: do not have effect of easing stress, adopt the mode of disposable throttle down, this can cause opening or moment of throttle down because pressure reduction is big, flow velocity is fast, produces serious vapour and washes away phenomenon; On the other hand, can push down impurity, cause sealing surface that the slit is arranged, cause then in the short time sealing surface being damaged.
The ball-valve type drain valve.In service because temperature high, pressure is big, and under worst hot case, the performance of expanding with heat and contract with cold of material can make the valve seal matching gap change, when switch valve, cause sealing surface wear and then produce and leak, sealing surface is washed out.
More than the valve of two kinds of structures can't carry out the renewal of inner body, must integral replacing in case go wrong, user cost is higher.Because each the replacing all must adopt welding technique to connect, be easy to generate welding slag in the welding process and be not easy cleaning simultaneously, valve seat easily in use weares and teares.
Summary of the invention
The technical problem that the present invention will solve is: a kind of antiscour drain valve that can reduce pressure to input media is provided, makes that pressure was lower when medium touched valve seat and flap.
In order to solve the problems of the technologies described above, the present invention includes valve body, valve seat, flap and valve rod, be provided with valve pocket in the valve body; Valve body is provided with import and the outlet that is communicated with valve pocket, and valve seat is arranged in valve pocket, is provided with valve cage in the described valve pocket; Valve cage comprises a slice video disc at least, and the middle part of video disc is provided with through hole, and the side on the video disc is provided with at least and is looped around the outer partition wall of through hole more than two circles; Be provided with passage between the adjacent partition wall, be intervally distributed with a plurality of imports on every circle partition wall, the import volume on all partition walls equates; Import on the adjacent partition wall is staggered mutually; The partition wall upper inlet of video disc outmost turns communicates with the import on the valve body, and the through hole on the video disc is connected with valve seat, and the through hole on the video disc is the passage that flap slides to valve seat.
When flap slides in the video disc through hole, between flap and the video disc through hole certain clearance is arranged, the area of passage between flap and the video disc is less than the area sum of the import of the inner ring partition wall of corresponding video disc.When switch valve, the drive that valve rod receives actuator moves up and down in valve cage, realizes that flow increases step by step or reduces, and moves to the top of valve cage up to flap, and valve is opened fully, and when flap moves to when contacting with valve base sealing, valve is closed fully.Play the effect that opens or closes valve step by step.
Be convenient in valve pocket, install and fix in order to make valve cage; Described valve cage includes a plurality of video discs; A plurality of video discs are axially closely arranged, and adjacent video disc welds mutually, and the basecoat video disc deviates from a side pressure of partition wall on valve seat; Be welded with video disc shelf on the last layer video disc, video disc shelf is provided with the valve cage gland that is threaded with valve body.
In order in use to keep in repair and change valve seat, described valve seat and valve body are split-type structural, are provided with valve seat selfsealings circle between valve seat and the valve body.
Reveal from valve rod in order to prevent medium; Described valve body is provided with Stuffing box; Valve rod interts in Stuffing box; Be filled with in the Stuffing box and be looped around the outer graphite packing of valve rod, be provided with the filler selfsealings circle of shutoff between valve rod and the Stuffing box at the filler downside, be provided with between valve rod and the Stuffing box retaining at the filler upside, be used to limit the filler gland that moves on the filler.Medium extruding filler selfsealings circle in the valve pocket makes to make graphite packing more closely contact good airproof performance with Stuffing box with valve rod by filler selfsealings circle extruded anisotropic graphite filler.
In order to reduce vibrations, described valve rod and flap are integral structure.
The invention has the beneficial effects as follows: the present invention is through the shunting decompression effect of valve cage; Input media is reduced pressure; Post-decompression medium could get into the chamber at valve seat and flap place; Make that pressure was lower when medium touched valve seat and flap, effectively reduced the working pressure of valve seat and flap, the sealing surface of valve seat and flap is not fragile.Long service life.And the number of times that can liquidate according to the shunting that operating mode designs sheet number and each video disc of video disc, pressure medium is reduced in the pressure range of working condition requirement when making in valve cage.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A partial enlarged drawing of Fig. 1;
Fig. 3 is the B partial enlarged drawing of Fig. 1;
Fig. 4 is the structural representation enlarged view of part 15 among Fig. 3;
Wherein: 1, valve body, 2, import, 3, valve seat, 4, valve cage, 5, flap; 6, valve cage gland, 7, Stuffing box, 8, valve rod, 9, outlet, 10, hold-down grid; 11, filler gland, 12, filler, 13, filler selfsealings circle, 14, video disc shelf, 15, video disc; 16, valve seat selfsealings circle, 17, through hole, 18, partition wall, 19, passage, 20, import.
Embodiment
A kind of specific embodiment shown in Fig. 1-4; It comprises valve body 1, valve seat 3, flap 5 and valve rod 8; Be provided with valve pocket in the valve body 1; Valve body 1 is provided with the import 2 and outlet 9 that is communicated with valve pocket, and valve seat 3 is arranged in valve pocket, and valve rod 8 is used for driving flap 5 and moves up and down at valve pocket and seal with valve seat 3 and contact to break away from valve seat 3 or realization.Thereby realize the opening and closing of valve.
As shown in Figure 3, be provided with valve cage 4 in the valve pocket, valve cage 4 comprises a plurality of video discs 15.As shown in Figure 4; The middle part of video disc 15 is provided with through hole 17, and the side on the video disc 15 is provided with five circles and is looped around the partition wall 18 outside the through hole 17, is provided with passage 19 between the adjacent partition wall 18; Be evenly distributed with 12 imports 20 on every circle partition wall 18, the import 20 on the adjacent partition wall 18 is staggered mutually.As shown in Figure 3; A plurality of video discs 15 are axially closely arranged, and adjacent video disc 15 welds mutually, and basecoat video disc 15 deviates from a side pressure of partition wall 18 on valve seat 3; Be welded with video disc shelf 14 on the last layer video disc 15; Video disc shelf 14 is provided with the valve cage gland 6 that is threaded with valve body 1, tightens valve cage gland 6, and valve cage 4 is fastened in the valve pocket.Partition wall 18 upper inlets 20 of all video disc 15 outmost turns communicate with the import 2 on the valve body 1, and the through hole 17 on the video disc 15 is connected with valve seat 3, and the through hole 17 on the video disc 15 slides to the passage of valve seat 3 for flap 5.
When flap 5 slides in the through hole 17 of video disc 15, between the through hole 17 of flap 5 and video disc 15 certain clearance is arranged, the area of passage between flap 5 and the video disc 15 is less than the area sum of the import of corresponding video disc 15 inner ring partition walls 18.
As shown in Figure 3, valve seat 3 is a split-type structural with valve body 1, is provided with valve seat selfsealings circle 16 between valve seat 3 and the valve body 1.
As shown in Figure 2; Valve body 1 is provided with Stuffing box 7; Valve rod 8 interts in Stuffing box 7; Be filled with the graphite packing 12 that is looped around outside the valve rod 8 in the Stuffing box 7, be provided with the filler selfsealings circle 13 of shutoff between valve rod 8 and the Stuffing box 7, be provided with the filler gland 11 of retaining between valve rod 8 and the Stuffing box 7 at filler 12 upsides at filler 12 downsides.Filler gland 11 is enclosed within on the valve rod 8, and filler gland 11 is provided with hold-down grid 10, and hold-down grid 10 is connected with Stuffing box 7 through bolt.
Working principle: Open valve, operating valve lever 8 make valve rod 8 drive the top that moves on to valve cage 4 on the flap 5, and medium is through in the valve cage 4 in the import 2 entering valve bodies 1 of valve body 1; The outermost surface partition wall 18 of video disc 15 through bump valve cage 4; Produce bidirectional shunt, get into outermost surface passage 19 from outermost surface import 20, the medium bump that each import 20 gets into one deck partition wall 18 down produces bidirectional shunt; Adjacent import 20 gets into and reduces pressure to the medium convection current that sides adjacent flows; And the import that gets into one deck partition wall 18, successively reduce pressure successively, at last through flow through valve seat 3 and flow out of through hole 17 from exporting 9.
Throttle down, operating valve lever 8 make valve rod 8 drive flap 5, and flap 5 realizes that from top to bottom successively through all video discs 15 flow reduces step by step, and when flap 5 contacted with valve seat 3 sealings, valve was closed fully.
Claims (6)
1. an antiscour drain valve comprises valve body, valve seat, flap and valve rod, is provided with valve pocket in the valve body; Valve body is provided with import and the outlet that is communicated with valve pocket, and valve seat is arranged in valve pocket, it is characterized in that: be provided with valve cage in the described valve pocket; Valve cage comprises a slice video disc at least, and the middle part of video disc is provided with through hole, and the side on the video disc is provided with at least and is looped around the outer partition wall of through hole more than two circles; Be provided with passage between the adjacent partition wall, be intervally distributed with a plurality of imports on every circle partition wall, the import volume on all partition walls equates; Import on the adjacent partition wall is staggered mutually; The partition wall upper inlet of video disc outmost turns communicates with the import on the valve body, and the through hole on the video disc is connected with valve seat, and the through hole on the video disc is the passage that flap slides to valve seat.
2. antiscour drain valve according to claim 1; It is characterized in that: when flap slides in the video disc through hole; Between flap and the video disc through hole certain clearance is arranged, the area of passage between flap and the video disc is less than the area sum of the import of the inner ring partition wall of corresponding video disc.
3. antiscour drain valve according to claim 1 and 2; It is characterized in that: described valve cage includes a plurality of video discs; A plurality of video discs are axially closely arranged, and adjacent video disc welds mutually, and the basecoat video disc deviates from a side pressure of partition wall on valve seat; Be welded with video disc shelf on the last layer video disc, video disc shelf is provided with the valve cage gland that is threaded with valve body.
4. antiscour drain valve according to claim 3 is characterized in that: described valve seat and valve body are split-type structural, are provided with valve seat selfsealings circle between valve seat and the valve body.
5. antiscour drain valve according to claim 4; It is characterized in that: described valve body is provided with Stuffing box; Valve rod interts in Stuffing box; Be filled with in the Stuffing box and be looped around the outer graphite packing of valve rod, be provided with the filler selfsealings circle of shutoff between valve rod and the Stuffing box at the filler downside, be provided with between valve rod and the Stuffing box retaining at the filler upside, be used to limit the filler gland that moves on the filler.
6. antiscour drain valve according to claim 5 is characterized in that: described valve rod and flap are integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100166582A CN102537647A (en) | 2012-01-19 | 2012-01-19 | Antiscour draining valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100166582A CN102537647A (en) | 2012-01-19 | 2012-01-19 | Antiscour draining valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102537647A true CN102537647A (en) | 2012-07-04 |
Family
ID=46345258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100166582A Pending CN102537647A (en) | 2012-01-19 | 2012-01-19 | Antiscour draining valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102537647A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626957A (en) * | 2016-03-25 | 2016-06-01 | 吴忠仪表有限责任公司 | Cavitation-resisting and pressure-lowering lamination valve cage |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2612842Y (en) * | 2003-03-26 | 2004-04-21 | 中国核工业集团公司苏州阀门厂 | Circulation opposite flushing type regulating valve |
| US20070017586A1 (en) * | 2005-07-19 | 2007-01-25 | Master Flo Valve Inc. | Reverse Flow Flow Trim for Choke Valve |
| CN201241994Y (en) * | 2008-08-21 | 2009-05-20 | 中国石油天然气股份有限公司 | Sleeve type labyrinth structure of regulating valve layer |
| CN201779292U (en) * | 2010-08-10 | 2011-03-30 | 上海阀特流体控制阀门有限公司 | Labyrinth pneumatic regulating valve |
| CN202419116U (en) * | 2012-01-19 | 2012-09-05 | 蔡天山 | Anti-washing steam trap valve |
-
2012
- 2012-01-19 CN CN2012100166582A patent/CN102537647A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2612842Y (en) * | 2003-03-26 | 2004-04-21 | 中国核工业集团公司苏州阀门厂 | Circulation opposite flushing type regulating valve |
| US20070017586A1 (en) * | 2005-07-19 | 2007-01-25 | Master Flo Valve Inc. | Reverse Flow Flow Trim for Choke Valve |
| CN201241994Y (en) * | 2008-08-21 | 2009-05-20 | 中国石油天然气股份有限公司 | Sleeve type labyrinth structure of regulating valve layer |
| CN201779292U (en) * | 2010-08-10 | 2011-03-30 | 上海阀特流体控制阀门有限公司 | Labyrinth pneumatic regulating valve |
| CN202419116U (en) * | 2012-01-19 | 2012-09-05 | 蔡天山 | Anti-washing steam trap valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626957A (en) * | 2016-03-25 | 2016-06-01 | 吴忠仪表有限责任公司 | Cavitation-resisting and pressure-lowering lamination valve cage |
| CN105626957B (en) * | 2016-03-25 | 2019-01-25 | 吴忠仪表有限责任公司 | Anti-cavitation is depressured lamination valve cage |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |