CN203656355U - Combined filler structure for valve with high temperature and pressure - Google Patents
Combined filler structure for valve with high temperature and pressure Download PDFInfo
- Publication number
- CN203656355U CN203656355U CN201320880266.0U CN201320880266U CN203656355U CN 203656355 U CN203656355 U CN 203656355U CN 201320880266 U CN201320880266 U CN 201320880266U CN 203656355 U CN203656355 U CN 203656355U
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- stainless steel
- valve
- filler
- expanded graphite
- packing
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- Expired - Fee Related
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Abstract
The utility model provides a combined filler structure for a valve with high temperature and pressure. Three laps of outside-weaved stainless steel wire flexible graphite weaving fillers are respectively placed on the upper part, the middle part and the lower part of a stuffing box; there are provided four laps of stainless steel band flexible graphite reinforcing fillers; and each two laps of the stainless steel band flexible graphite reinforcing fillers are placed in the middle of the two adjacent outside-weaved stainless steel wire flexible graphite weaving fillers. Great improvements are made to an original structure in the combined filler structure to alleviate quick decrease of filler seal radial force along an axial direction and solve instant seal invalidity of a filler of a valve with high temperature and pressure in an original structure, so that great sealing performance of the valve with high temperature and pressure is guaranteed.
Description
Technical field
The utility model relates to a kind of high-temperature high pressure valve combined packing structure, can be widely used in the valve that gate valve, stop valve, three-way valve etc. adopt stem packing to seal.
Background technique
Stem packing sealability is one of leading indicator of valve overall performance, and the quality of its sealing directly determines whether valve has external leakage.The different operating modes of root Ju, select suitable filling material, and the appropriate design stuffing box degree of depth, adopts rational packing seal structure and mounting type, just can reach good valve stem seal effect.
As shown in Figure 1 be the filling-material structure of current High Temperature High Pressure power station valve, it is made up of valve rod 01, valve gap 02, Packing seat 03, filler 04, filler pressing sleeve 05, hold-down grid 06, swing bolt 07, nut 08, this kind of valve is mainly applicable to the occasion that medium is steam and water, and filler material is for strengthening Expanded graphite.
Its sealing principle is: under the axial pressure effect of filler pressing sleeve, filler produces axial compression and radial expansion, and the radial force of generation contacts it closely with valve gap with valve rod, thereby prevent that the medium such as liquid or gas from leaking.For guaranteeing gland sealed reliability, must guarantee the radial pressure of filler to valve rod.Pressure distribution situation when this kind of structured packing sealing is: along with the increase of the stuffing box degree of depth, radial pressure is pressed exponential law and is reduced, maximum radial pressure is in the superiors' filler and filler pressing sleeve contacting point, and smallest radial stress is in orlop filler and Packing seat contacting point.
Therefore this packing seal structure, in the time of filler pretension, if there is no enough large axial pressure, only has upper strata two or three to enclose filler and can produce necessary radial force, plays seal action; Packing seal effect near stuffing box bottom is very limited, and the seal action of all insertion rings is effectively performance not.And radial force is larger, between valve rod and filler, frictional force is larger, causes stem movement bite, filler and valve lever clearance to increase, and when pressure medium is high, filler is easily extruded from the gap increasing, and causes valve stem seal moment to lose efficacy.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of high-temperature high pressure valve combined packing structure is provided, and makes stem packing sealability reliable, reduces valve leakage out of steam system, improves valve overall performance.
The utility model is achieved through the following technical solutions above-mentioned purpose:
A kind of high-temperature high pressure valve is made up of valve rod, valve gap, Packing seat, the braided packing of outer volume Stainless Steel Wire Expanded graphite, the reinforcing filler of Stainless Steel Band Expanded graphite, filler pressing sleeve, hold-down grid, swing bolt, butterfly spring, nut by combined packing structure.
Described valve rod cylindrical and valve gap top endoporus form stuffing box, and Packing seat is placed in stuffing box bottommost, for supporting packing ring; The braided packing of described outer volume Stainless Steel Wire Expanded graphite is totally three circles, be placed in respectively the upper, middle and lower portion of stuffing box, the reinforcing filler of described Stainless Steel Band Expanded graphite is totally four circles, and every two circles are one group and are placed on two adjacent rings and compile outward in the middle of the braided packing of Stainless Steel Wire Expanded graphite; Described filler pressing sleeve outer spherical surface coordinates with hold-down grid inner ball surface, and described swing bolt through hold-down grid through hole, screws with nut, configures a pair of butterfly spring below nut.
The described fine and closely woven stainless steel metal wire of the outer employing of outer volume Stainless Steel Wire Expanded graphite braided packing is closely wrapped in internal production by Expanded graphite and forms, in the utility model structure, adopt this filler of three circles, wherein the superiors and lower floor adopt such filler can effectively avoid extruding of Expanded graphite under high pressure, and there is certain seal action, such filler of mesosphere plays intermal force, to pass through hold-down grid, outside filler pressing sleeve and upper strata, compile the pretightening force that the braided packing of Stainless Steel Wire Expanded graphite passes to upper strata two and enclose the reinforcing filler of Stainless Steel Band Expanded graphite, pass to lower floor two and enclose the reinforcing filler of Stainless Steel Band Expanded graphite, effectively reduce pretightening force decay, make each circle Stainless Steel Band Expanded graphite reinforcing filler stressed evenly, reach best sealing effect, on pretension swing bolt, install paired butterfly spring, by rotating nut, pretightening force is passed to filler and carries out pretension, the elastic force of butterfly spring can be continuously filler preload pressure is provided.
Combined packing structure shown in the utility model has been carried out significant improvement to original structure, reduce the phenomenon that packing seal radial force decays vertically fast, the problem that has solved the inefficacy of original structure high-temperature high pressure valve packing seal moment, can guarantee the sealability that high-temperature high pressure valve filler is good.The successful utilization of this filling-material structure, has greatly improved the sealability of high-temperature high pressure valve, for China 600MW, the high-end Valves localization fast development of 1000MW super (super-) critical thermal power generation unit provide technical support.This structure is equally applicable to the valve field such as some other oil, chemical industry, and the market demand and Technique Popularizing application prospect are very wide, and its economical, societal benefits are extremely remarkable.
Accompanying drawing explanation
Fig. 1 is existing packing seal structure schematic diagram.
Fig. 2 is structural representation of the present utility model.
Embodiment
A kind of high-temperature high pressure valve is as shown in Figure 2 made up of valve rod 1, valve gap 2, Packing seat 3, outer volume Stainless Steel Wire Expanded graphite braided packing 4, Stainless Steel Band Expanded graphite reinforcing filler 5, filler pressing sleeve 6, hold-down grid 7, swing bolt 8, butterfly spring 9, nut 10 by combined packing structure.
Described valve rod 1 cylindrical and valve gap 2 top endoporus form stuffing box, and Packing seat 3 is placed in stuffing box bottommost, for supporting packing ring; Described outer volume Stainless Steel Wire Expanded graphite braided packing 4 is totally 3 circles, be placed in respectively the upper, middle and lower portion of stuffing box, described Stainless Steel Band Expanded graphite reinforcing filler 5 is totally 4 circles, and every 2 circles are one group and are placed on two adjacent rings and compile outward in the middle of Stainless Steel Wire Expanded graphite braided packing 4; Described filler pressing sleeve 6 outer spherical surfaces coordinate with hold-down grid 7 inner ball surface, and described swing bolt 8, through hold-down grid 7 through holes, screws with nut 10, and nut 10 configures a pair of butterfly spring 9 below.
The described fine and closely woven stainless steel metal wire of outer volume Stainless Steel Wire Expanded graphite braided packing 4 outer employing is closely wrapped in internal production by Expanded graphite and forms, in the utility model structure, adopt this filler of 3 circles, wherein the superiors and lower floor adopt such filler can effectively avoid extruding of Expanded graphite under high pressure, and have certain seal action.Such filler of mesosphere plays intermal force, to pass to upper strata 2 and enclose the pretightening force of Stainless Steel Band Expanded graphite reinforcing filler 5 by compiling Stainless Steel Wire Expanded graphite braided packing 4 outside hold-down grid 7, filler pressing sleeve 6 and upper strata, pass to lower floor 2 and enclose Stainless Steel Band Expanded graphite reinforcing filler 5, effectively reduce pretightening force decay, make each circle Stainless Steel Band Expanded graphite reinforcing filler 4 stressed evenly, reach best sealing effect; On pretension swing bolt 8, install paired butterfly spring 9, by rotating nut 10, pretightening force is passed to filler and carries out pretension, the elastic force of butterfly spring 8 can be continuously filler preload pressure is provided.
Claims (1)
1. a high-temperature high pressure valve is made up of valve rod (1), valve gap (2), Packing seat (3), outer volume Stainless Steel Wire Expanded graphite braided packing (4), Stainless Steel Band Expanded graphite reinforcing filler (5), filler pressing sleeve (6), hold-down grid (7), swing bolt (8), butterfly spring (9), nut (10) by combined packing structure, it is characterized in that: described valve rod (1) cylindrical and valve gap (2) top endoporus form stuffing box, and Packing seat (3) is placed in stuffing box bottommost; Described outer volume Stainless Steel Wire Expanded graphite braided packing (4) is totally 3 circles, be placed in respectively the upper, middle and lower portion of stuffing box, described Stainless Steel Band Expanded graphite reinforcing filler (5) is totally 4 circles, and every 2 circles are one group and are placed on two adjacent rings and compile outward in the middle of Stainless Steel Wire Expanded graphite braided packing (4); Described filler pressing sleeve (6) outer spherical surface coordinates with hold-down grid (7) inner ball surface, and described swing bolt (8), through hold-down grid (7) through hole, screws with nut (10), and nut (10) configures a pair of butterfly spring (9) below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320880266.0U CN203656355U (en) | 2013-12-30 | 2013-12-30 | Combined filler structure for valve with high temperature and pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320880266.0U CN203656355U (en) | 2013-12-30 | 2013-12-30 | Combined filler structure for valve with high temperature and pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203656355U true CN203656355U (en) | 2014-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320880266.0U Expired - Fee Related CN203656355U (en) | 2013-12-30 | 2013-12-30 | Combined filler structure for valve with high temperature and pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203656355U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318097A (en) * | 2014-06-24 | 2016-02-10 | 进典工业股份有限公司 | Fluid valve and modularized mandrel sealing structure thereof |
| TWI555940B (en) * | 2014-06-24 | 2016-11-01 | 進典工業股份有限公司 | Valve and stem package module of the same |
| TWI571581B (en) * | 2014-06-24 | 2017-02-21 | 進典工業股份有限公司 | Valve and stem package structure of the same |
| US9863552B2 (en) | 2014-06-24 | 2018-01-09 | Jdv Control Valves Co., Ltd. | Fluid valve and a single shaft-sealing module thereof |
| CN108443575A (en) * | 2018-03-06 | 2018-08-24 | 宁波联博斯密封材料有限公司 | A kind of valve high pressure MULTILAYER COMPOSITE filler and its manufacturing process |
-
2013
- 2013-12-30 CN CN201320880266.0U patent/CN203656355U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105318097A (en) * | 2014-06-24 | 2016-02-10 | 进典工业股份有限公司 | Fluid valve and modularized mandrel sealing structure thereof |
| TWI555940B (en) * | 2014-06-24 | 2016-11-01 | 進典工業股份有限公司 | Valve and stem package module of the same |
| TWI571581B (en) * | 2014-06-24 | 2017-02-21 | 進典工業股份有限公司 | Valve and stem package structure of the same |
| US9863552B2 (en) | 2014-06-24 | 2018-01-09 | Jdv Control Valves Co., Ltd. | Fluid valve and a single shaft-sealing module thereof |
| CN108443575A (en) * | 2018-03-06 | 2018-08-24 | 宁波联博斯密封材料有限公司 | A kind of valve high pressure MULTILAYER COMPOSITE filler and its manufacturing process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20141230 |
|
| EXPY | Termination of patent right or utility model |