CN203770701U - Anti-locking wedge-shaped single wedge disc gate valve for ultra supercritical state - Google Patents
Anti-locking wedge-shaped single wedge disc gate valve for ultra supercritical state Download PDFInfo
- Publication number
- CN203770701U CN203770701U CN201420178982.9U CN201420178982U CN203770701U CN 203770701 U CN203770701 U CN 203770701U CN 201420178982 U CN201420178982 U CN 201420178982U CN 203770701 U CN203770701 U CN 203770701U
- Authority
- CN
- China
- Prior art keywords
- valve
- wedge
- valve rod
- gate valve
- flashboard
- 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.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000009471 action Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
Abstract
The utility model relates to an anti-locking wedge-shaped single wedge disc gate valve for an ultra supercritical state. The anti-locking wedge-shaped single wedge disc gate valve comprises a valve body, a valve seat, a wedge disc, a valve rod, a valve deck, a transmission mechanism, a sealing piece and a mounting piece. A middle cavity self-sealing device is arranged between the valve deck and the valve body, and a stuffing box is arranged between the valve rod and the valve deck. The anti-locking wedge-shaped single wedge disc gate valve is characterized in that a limiting nut is arranged at the upper end of the valve rod, the upper end of the limiting nut is fixed to the upper end of the valve rod through a fixing pin, the lower end face of the limiting nut and the upper end face of a valve rod nut are provided with annular planes matched with each other, and pressure balancing holes are formed in the side plane of an inlet of the wedge disc and the middle part of the lower end of the wedge disc. The phenomenon that the strength of a middle cavity is jeopardized due to the fact that the wedge disc is locked due to moment when the valve is closed and the pressure of media in the middle cavity is raised too high when the valve is opened is avoided. The anti-locking wedge-shaped single wedge disc gate valve has the advantages of being easy to machine, flexibly in opening and closing, reliable in sealing and the like and is suitable for a control valve for an ultra supercritical unit turbine front end main steam pipeline.
Description
Technical field
The utility model belongs to valve field, specifically about a kind of wedge action valve.The utility model is applicable to the control valve of ultra supercritical power generator turbine front end main steam line.
Background technique
Under normal circumstances, power station sluice valve generally adopts casting valve body wedge-type double-flashboard structure.Wedge type double gate board gate valve requires low to flashboard angle of wedge accuracy of manufacturing, sealability is better, easy to maintenance after sealing surface wear, but because two flashboards are that top, lower pedal is fixing, the situation that flashboard comes off usually can occur in actual use; Wedge-type rigidity single-shutter gate valve simple in structure, easily manufactured, but flashboard angle of wedge quality of fit is had relatively high expectations, temperature variation easily causes that local increase of specific pressure cause sealing surface scratch; Wedge-type elastic single disc gate valve is simple in structure, has micro-change compensating action, flashboard angle of wedge quality of fit is required lower, easily sealing, but easily make flashboard follow the string and cause valve stuck when excessive when closing moment; And when wedge-type rigidity single-shutter gate valve or wedge-type elastic single disc gate valve are opened under long-time closed condition, high temperature media raises airtight middle cavity pressure fast, causes jeopardizing lumen intensity.
Summary of the invention
The purpose of this utility model is the shortcoming existing for prior art, a kind of easy processing is provided, opens and closes flexibly, seal anti-jamming wedge shape single-shutter gate valve for high temperature resistant, high voltage bearing ultra supercritical reliably.
The technical solution of the utility model comprises valve body, valve seat, flashboard, valve rod, valve gap, driving mechanism, Sealing and assembling set, valve body adopts ASTM A182F92 material monolithic to forge, flashboard adopts wedge shape Single disc structure, valve rod lower end is fixedly connected with flashboard, valve rod upper end is connected with driving mechanism by Stem Mut, between valve gap and valve body, be provided with lumen self-seal device, between valve rod and valve gap, be provided with stuffing box; Be mainly that a stop nut is set in valve rod upper end, this stop nut upper end is fixed on valve rod upper end portion by fixing pin, and stop nut lower end surface and Stem Mut upper-end surface have the planar annular cooperatively interacting; Be shaped with pressure compensation opening in flashboard suction side plane and intermediate portion, flashboard lower end.
In above technological scheme, stuffing box is combined by upper and lower two groups of efficient sealed rings and an intermediate metal spacer ring, every group of efficient sealed ring combined by 3 low-density pure graphite central rings and 2 highdensity carbon fiber plate butt rings, and the profile of each ring is cup-and-cone shape.
In above technological scheme, stuffing box is installed by filler pressing sleeve and hold-down grid, and hold-down grid is made up of top board and press table, and combination butterfly spring is set between top board and press table.
In above technological scheme, described lumen self-seal device is made up of seal ring, pendant collet, pressing plate, seal ring inner conical surface and valve gap male cone (strobilus masculinus) cooperatively interact, and the upper-end surface of seal ring is press-fited by the lower end surface of pendant collet, and the lower end surface of pressing plate is fitted on the upper-end surface of pendant collet.
The utility model has the advantages that: a stop nut is set in valve rod upper end, prevents from causing flashboard stuck because crossing moment in the time of valve closing; Be shaped with pressure compensation opening in intermediate portion, flashboard suction side plane lower end, make valve body lumen and entrance point pressure and temperature in the situation of valve closing keep balance, prevent from when valve from opening under long-time closed condition rising so high because the rising of temperature makes airtight lumen pressure medium, jeopardize lumen intensity.There is easy processing, open and close flexibly, seal the advantages such as reliable.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Anti-jamming wedge shape single-shutter gate valve for ultra supercritical as shown in Figure 1, comprise valve body 1, valve seat 2, flashboard 3, valve rod 4, valve gap 5, driving mechanism 16, Sealing and assembling set, valve body 1 adopts ASTM A182F92 material monolithic to forge, have high temperature resistant, high voltage performance, flashboard 3 adopts wedge shape Single disc structure, the wedge-type seal face of flashboard 3 cooperatively interacts with valve seat 2 wedge-type seal faces, valve rod 4 lower ends are fixedly connected with flashboard 3, valve rod 4 upper ends are connected with driving mechanism 16 by Stem Mut 17, between valve gap 5 and valve body 1, be provided with lumen self-seal device, realize the lumen sealing between valve gap 5 and valve body 1, between valve rod 4 and valve gap 5, be provided with stuffing box 10, realize the sealing between valve rod 4 and valve gap 5, in valve rod 4 upper ends, a stop nut 18 is set, this stop nut 18 is fixed on the upper end of valve rod 4 by fixing pin 19, stop nut 18 lower end surfaces and Stem Mut 17 upper-end surfaces have the planar annular cooperatively interacting, in the time of flashboard 3 and valve seat 2 closed condition, the lower end surface of stop nut 18 and Stem Mut 17 upper-end surfaces contact, restriction valve rod 4 moves down, and prevents from causing flashboard 3 stuck because crossing moment in the time of valve closing, be shaped with pressure compensation opening 20 in flashboard 3 intermediate portions, suction side plane lower end, import medium is introduced to valve body 1 lumen, while preventing that flashboard 3 from opening, the sudden change of lumen temperature and pressure causes damage to valve body 1.
Stuffing box 10 is combined by upper and lower two groups of efficient sealed rings and an intermediate metal spacer ring 9, every group of efficient sealed ring combined by 3 low-density pure graphite central rings and 2 highdensity carbon fiber plate butt rings, the profile of each ring is cup-and-cone shape, effectively control the Radial Flow of filler, strengthen the radial deformation of filler, thereby obtain more effective sealing at filler internal diameter and outer radius.
Stuffing box 10 is installed by filler pressing sleeve 11 and hold-down grid, hold-down grid is made up of top board 14 and press table 12, combination butterfly spring 13 is set between top board 14 and press table 12, this combination butterfly spring 13 adopts two involutory modes of butterfly spring to combine, the concave surface of two butterfly springs is installed relatively, when installation, the concave surface of two butterfly springs is flattened, from live-loaded packing letter 10 sealing forces.Top board 14 and press table 12 are directly installed in the screw of valve gap 5 upper-end surfaces by bolt 15, dwindle prior art and adopt supporting frame that needed huge space is installed.
Lumen self-seal device is made up of seal ring 6, pendant collet 7, pressing plate 8, and seal ring 6 inner conical surfaces and valve gap 5 male cone (strobilus masculinus)s cooperatively interact, and the upper-end surface of seal ring 6 is press-fited by the lower end surface of pendant collet 7, and the lower end surface of pressing plate 8 is fitted on the upper-end surface of pendant collet 7.
Claims (4)
1. an anti-jamming wedge shape single-shutter gate valve for ultra supercritical, comprise valve body (1), valve seat (2), flashboard (3), valve rod (4), valve gap (5), driving mechanism (16), Sealing and assembling set, valve body (1) adopts ASTM A182F92 material monolithic to forge, flashboard (3) adopts wedge shape Single disc structure, valve rod (4) lower end is fixedly connected with flashboard (3), valve rod (4) upper end is connected with driving mechanism (16) by Stem Mut (17), between valve gap (5) and valve body (1), be provided with lumen self-seal device, between valve rod (4) and valve gap (5), be provided with stuffing box (10), it is characterized in that, in valve rod (4) upper end, a stop nut (18) is set, this stop nut (18) is fixed on the upper end of valve rod (4) by fixing pin (19), stop nut (18) lower end surface and Stem Mut (17) upper-end surface have the planar annular cooperatively interacting, be shaped with pressure compensation opening (20) in intermediate portion, flashboard (3) suction side plane lower end.
2. anti-jamming wedge shape single-shutter gate valve for ultra supercritical according to claim 1, it is characterized in that stuffing box (10) is combined by upper and lower two groups of efficient sealed rings and an intermediate metal spacer ring (9), every group of efficient sealed ring combined by 3 low-density pure graphite central rings and 2 highdensity carbon fiber plate butt rings, and the profile of each ring is cup-and-cone shape.
3. anti-jamming wedge shape single-shutter gate valve for ultra supercritical according to claim 1, it is characterized in that stuffing box (10) is by filler pressing sleeve (11) and hold-down grid installation, hold-down grid is made up of top board (14) and press table (12), combination butterfly spring (13) is set between top board (14) and press table (12), and this combination butterfly spring (13) adopts two involutory modes of butterfly spring to combine.
4. according to the anti-jamming wedge shape single-shutter gate valve for ultra supercritical described in claim 1 or 2 or 3, it is characterized in that lumen self-seal device is made up of seal ring (6), pendant collet (7), pressing plate (8), seal ring (6) inner conical surface and valve gap (5) male cone (strobilus masculinus) cooperatively interact, the upper-end surface of seal ring (6) is press-fited by the lower end surface of pendant collet (7), and the lower end surface of pressing plate (8) is fitted on the upper-end surface of pendant collet (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420178982.9U CN203770701U (en) | 2014-04-03 | 2014-04-03 | Anti-locking wedge-shaped single wedge disc gate valve for ultra supercritical state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420178982.9U CN203770701U (en) | 2014-04-03 | 2014-04-03 | Anti-locking wedge-shaped single wedge disc gate valve for ultra supercritical state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203770701U true CN203770701U (en) | 2014-08-13 |
Family
ID=51287892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420178982.9U Expired - Lifetime CN203770701U (en) | 2014-04-03 | 2014-04-03 | Anti-locking wedge-shaped single wedge disc gate valve for ultra supercritical state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203770701U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455509A (en) * | 2014-11-21 | 2015-03-25 | 苏州福润机械有限公司 | Gate valve |
| CN112963558A (en) * | 2021-03-26 | 2021-06-15 | 马鞍山钢铁股份有限公司 | Method for reducing double-gate valve faults of high-pressure steam-water system |
-
2014
- 2014-04-03 CN CN201420178982.9U patent/CN203770701U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455509A (en) * | 2014-11-21 | 2015-03-25 | 苏州福润机械有限公司 | Gate valve |
| CN112963558A (en) * | 2021-03-26 | 2021-06-15 | 马鞍山钢铁股份有限公司 | Method for reducing double-gate valve faults of high-pressure steam-water system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140813 |