CN2931957Y - Scouring-free cut-off valve - Google Patents
Scouring-free cut-off valve Download PDFInfo
- Publication number
- CN2931957Y CN2931957Y CN 200620086380 CN200620086380U CN2931957Y CN 2931957 Y CN2931957 Y CN 2931957Y CN 200620086380 CN200620086380 CN 200620086380 CN 200620086380 U CN200620086380 U CN 200620086380U CN 2931957 Y CN2931957 Y CN 2931957Y
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- China
- Prior art keywords
- valve
- valve seat
- seat
- spool
- wash
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- 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 - Fee Related
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Abstract
The utility model relates to a washing free disconnecting valve in industry thermodynamic system, which comprises a valve body, a valve plug, a valve rod, a support, a handle wheel and a sealing device. The utility model is characterized in that, the valve body is provided with a trunk type valve seat, the lower part of the valve seat is provided with a valve seat sealing plane, the surface of the valve seat is provided with circulation window, the lower extreme of the valve seat is connected with a valve seat hole through a sealing ring pad, the upper extreme of the valve seat is connected with the valve body through a pressing cover or a bolt. The valve seat sealing plane is fixed in the valve seat and when sealing plane of the valve plug or valve seat is damaged, it is no need unloading or discarding the disconnecting valve from the system but changing valve seat and valve plug. In addition, due to the said structure, fluid entering the valve automatically hedging with each other, this will eliminate energy. When valve is closed, retentive on the valve seat sealing plane is automatically swept, which makes the utility model of long service life, convenient for fixing and adjusting flow rate function.
Description
Technical field:
The utility model relates to valve, specifically a kind of wash-free stop valve that is applied to industrial thermodynamic system.
Background technique:
We know, thermal power generation, in the thermodynamic systems such as petrochemical industry, the widespread usage wash-free stop valve, wash-free stop valve is provided with valve body, valve body is provided with import and export, valve seat orifice and valve seat, valve seat matches with spool to realize opening of stop valve, close function, spool and lower valve rod are structure as a whole, by coupling and upper valve rod link, valve body top is provided with support, handwheel, handwheel is connected with valve rod, is provided with the seal arrangement that prevents that the valve body cavity pressure from leaking in the intermediate portion of valve, and seal arrangement divides self-sealed, bolton gland seal formula, bolton support sealing etc.
Be installed in the interior spool of valve body for exempting to wash away structure, valve core sealed cover is located at cylindrical shell top, the rectangular through-flow windows two-layer about the spool cylindrical shell is provided with, that 90 degree that interlace are arranged, this valve has been avoided directly washing away of fluid in the course of the work because of spool, sealing surface of seat, solve the valve that causes because of fluid scouring effectively and damaged, prolonged working life.But the spool of this topology window can not be mediated to flow, moreover thin, the jagged stress of the bridge of two-layer window, and the normal cylindrical shell that takes place fractures in the use.Do not reach of the requirement of High Temperature High Pressure thermodynamic system to valve reliability.
The sealing surface of valve seat is by after the carbide electrode built-up welding, form metallurgy combination and become one with valve body, because overlay cladding is two kinds of metals that expansion coefficient is different with mother metal, in the very long working procedure of valve, because switch produces hot repeatedly alternation repeatedly, cause overlay cladding and mother metal hoop cracking, make valve when closing, lose leakproofness, in addition, when work, there is external comparatively hard particulate matter to be trapped in the sealing surface place once in a while, spool is when valve closing, sealing surface of seat produces squeeze and destroy relatively, make valve lose leakproofness equally when closing, its maximum deficiency is when wanting to repair, and it must be pulled down from system, again built-up welding, processing or discarded renewal, the maintenance expenses height, time is long.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of valve seat energy fast assembling-disassembling, replacing are provided, and spool can be regulated flow, the high wash-free stop valve of spool cylindrical shell bridge intensity.
The utility model can reach by following measure:
A kind of wash-free stop valve, be provided with valve body, spool, valve rod, support, handwheel and seal arrangement, structure characteristic of the present invention be valve seat be one independently, tubular, parts that can dismounting and change, in order to distinguish the valve seat of built-up welding on valve body in the prior art, we are called the tubular valve seat, the tubular valve seat is installed in the valve body, tubular valve base inner wall bottom is provided with sealing surface of seat, spool is installed in the tubular valve seat, during valve closing, valve core sealed cover and tubular sealing surface of seat fitted seal, form the blocking-up of convection cell, the barrel of tubular valve seat is provided with the through-flow window of symmetrical distribution, make and enter through-flow window fluid and entered the tubular valve seat equably, avoid fluid to cause unidirectional power to impact to spool, tubular valve seat lower end is connected with the valve block hole by seal washer, and the upper end of tubular valve seat is connected with valve body through gland or bolt.
The position that equates with the sealing surface of seat axial height on the barrel of tubular valve seat in the utility model, two window adjacent holes bridge portions, several open-works along circle tangent direction in the cylindrical shell evenly distribute, in order to being detained foreign material with working fluid cleaning sealing surface of seat place, when preventing throttle down, spool and sealing surface of seat are because the existence of foreign material produces squeeze and destroy.
In the utility model, spool lower end cylindrical shell is provided with symmetric arrangement, area is the through-flow window of equal percentage, window be shaped as isosceles triangle, divide two-layer up and down, lower floor's triangle drift angle up, upper strata triangle drift angle down, two-layer up and down leg-of-mutton center line staggers, mutually inserted arranges, with the intensity that increases the sealing surface bridge and realized continuous adjusting to flow, because the through-flow window of spool is a symmetric arrangement, fluid from spool cylindrical shell outside when entering spool, fluid liquidates mutually, has realized automatic energy dissipating, and the fluid after the energy dissipating is when entering the runner of valve outlet survey, the working medium particle that flows is even, releive, operating noise is very low.
Tubular valve seat of the present utility model is an individual components, when the sealing surface of spool and valve seat damages, needn't stop valve be pulled down from system, as long as change valve seat tube and spool again.Owing to adopt above-mentioned structure, the automatic cleaning to sealing surface during valve closing in addition has long service life, easy to maintenance, advantage such as the Flow-rate adjustment characteristic curve is level and smooth.
Description of drawings
Fig. 1 is the utility model embodiment 1 a structural representation.
Fig. 2 is the utility model embodiment 2 a structural representation.
Fig. 3 is the schematic representation of valve seat tube among the utility model embodiment 3.
Fig. 4 is the structural drawing of tubular valve seat 3 among Fig. 1.
Fig. 5 is the A-A sectional drawing of tubular valve seat 3 among Fig. 1.
Fig. 6 is the structural drawing of tubular valve seat 3 among Fig. 2.
Fig. 7 is the structural drawing of tubular valve seat 3 among Fig. 3.
Fig. 8 is the structural drawing of spool 2 among Fig. 1, Fig. 2, Fig. 3.
Fig. 9 is the unfolded drawing of spool cylindrical shell window among Fig. 8.
Embodiment
Embodiment 1: as shown in Figure 1, a kind of wash-free stop valve that has self sealing structure, by valve body 1, spool 2, tubular valve seat 3, fixedly tubular valve seat bolt 4, the valve gap 5 that floats, domatic seal ring 6, little valve gap 7, Gland 8, coupling 9, upper valve rod 10, handwheel 11, seal washer 12, place parts such as seal washer groove 13, support 14 and form.Wherein by unsteady valve gap 5, domatic seal ring 6, little valve gap 7, Deng self sealing structure and the coupling 9 formed, upper valve rod 10, handwheel 11 interconnected relationships are same as the prior art, this does not give unnecessary details, be provided with tubular valve seat 3 in the valve body 1, spool 2 is installed in the tubular valve seat 3, tubular valve seat tube 3 inwall bottoms are provided with boss, boss is through being machined to sealing surface of seat 14, have the through-flow window 15 of symmetrical distribution on the barrel of tubular valve seat 3, make the fluid that enters the tubular valve seat even, releive, tubular valve seat 3 lower end seams 17 places, place seal washer 12, the valve seat orifice groove 13 that processes by seal washer 12 and valve body cooperates, the effect of seal washer 12 is that blocking-up valve body internal pressure leaks into the outlet survey when valve closing, tubular valve seat 3 is by fixing tubular valve seat bolt 4, and it is interior and provide impacting force for seal washer 12 to be fixed on valve body.
The position that equates with sealing surface of seat 6 axial heights on the barrel of tubular valve seat 3 in the utility model, two window adjacent holes bridge portions, several open-works 19 along circle tangent direction in the cylindrical shell evenly distribute, in order to being detained foreign material with working fluid cleaning sealing surface of seat place, when preventing throttle down, spool and sealing surface of seat are because the existence of foreign material produces squeeze and destroy.
In the present embodiment, spool lower end cylindrical shell is provided with symmetric arrangement, area is the through-flow window 18 of equal percentage, so-called equal percentage, the percentage that is exactly valve opening equates with through-flow window 18 area percentages that spool exposes, window 18 be shaped as isosceles triangle, divide two-layerly up and down, lower floor's triangle drift angle up, upper strata triangle drift angle down, two-layer up and down median of a triangle staggers, mutually inserted is arranged.To increase the intensity of sealing surface bridge, and realized continuous adjusting to flow, because the through-flow window 18 of spool is symmetric arrangement, fluid from spool cylindrical shell outside when entering spool, fluid liquidates mutually, energy dissipating automatically, and the fluid after the energy dissipating is when entering the runner of valve outlet survey, the working medium particle that flows evenly, releive, operating noise is very low.
Valve seat construction in the present embodiment is applicable to that latus rectum is with the high pressure valve of self sealing structure more than DN50.
Embodiment 2:
As shown in Figure 2, a kind of bolton gland seal formula wash-free stop valve, by valve body 1, spool 2, tubular valve seat 3, valve bonnet seal packing ring 4, valve gap 5, Gland 6, support 13 parts such as grade are formed, be provided with tubular valve seat 3 in the valve body 1, spool 2 is installed in the tubular valve seat 3, the structure of tubular valve seat 3 is compared with the tubular valve seat among the embodiment 1, its characteristic difference is that the valve seat upper end in the present embodiment does not have flange, last seal ring, the impacting force of lower seal provides by the valve gap bolt, remove valve seat means of fixation in valve body, the mode that the compresses difference of seal washer, its function and principle are identical, this does not give unnecessary details, the effect of last seal ring is that blocking-up valve body internal high pressure fluid leaks, and when the effect of lower seal was valve closing, blocking-up high-pressure spray body drain was surveyed to outlet.
In the present embodiment, the structure of spool is identical with valve core structure among the embodiment 1, and this does not give unnecessary details.
Valve seat construction in the present embodiment, be applicable to latus rectum more than the DN32, below the DN50 not with the high pressure valve of self sealing structure.
Embodiment 3:
As shown in Figure 3, a kind of wash-free stop valve, be provided with valve body 1, spool 2, tubular valve seat 3, upper sealing washer 4, support and valve body connecting bolt 5, the compositions such as valve seat orifice groove 12 that cylindrical shell shoulder 6, Gland 7, support 8, bonnet 9, handwheel 10, lower sealing washer 11, valve body process.Be provided with tubular valve seat 3 in the valve body 1, spool 2 is installed in the tubular valve seat 3, and the structure characteristic of tubular valve seat 3 is that valve seat and stuffing box are overall structure.Cylindrical shell epimere inner circle is a stuffing box 13, last middle part cylindrical has a shoulder 6, seal washer 4 is placed in the bottom of shoulder, the effect of sealing packing ring is that blocking-up valve body internal pressure leaks, at cylindrical place, the bottom of cylindrical shell, one seam is arranged, be used for placing lower sealing washer 11, seal washer cooperates with the groove 12 that valve body processes.The effect of sealing packing ring is that blocking-up valve body internal pressure leaks to export when valve closing and surveys.The impacting force of upper sealing washer 4 and lower sealing washer 11 is provided by the connecting bolt 5 of support and valve body.On barrel, have the through-flow window of symmetrical distribution, the circumference place of the position that equates with inner barrel sealing surface axial height in the bottom of cylindrical shell, the open-work of several tangent directions that evenly distribute, purpose is to utilize working fluid, cleaning may be trapped in the external foreign material at sealing surface place.
In the present embodiment, the structure of spool is identical with valve core structure among the embodiment 1, and this does not give unnecessary details.
Valve seat construction in the present embodiment is applicable to the high pressure valve of latus rectum below DN25.
Claims (5)
1, a kind of wash-free stop valve, be provided with valve body, spool, valve rod, support, handwheel and seal arrangement, it is characterized in that being provided with in the valve body tubular valve seat, be provided with spool in the valve seat tube, tubular valve base inner wall bottom is provided with sealing surface of seat, the barrel of tubular valve seat is provided with through-flow window, and tubular valve seat lower end is connected with valve seat orifice by seal washer, and the upper end of valve seat tube is connected with valve body through gland or bolt.
2, a kind of wash-free stop valve according to claim 1 is characterized in that having on the barrel of valve seat tube the through-flow window of symmetrical distribution.
3, a kind of wash-free stop valve according to claim 1 is characterized in that the position that equates with the sealing surface of seat axial height on the barrel of valve seat tube, the bridge place between each window, is provided with open-work along circle tangent direction in the valve seat.
4, a kind of wash-free stop valve according to claim 1 is characterized in that the cylindrical shell of spool lower end is provided with symmetric arrangement, area is the through-flow window of equal percentage.
5, a kind of wash-free stop valve according to claim 4, it is characterized in that the spool lower end through-flow window be shaped as isosceles triangle, divide two-layerly up and down, lower floor's triangle drift angle up, upper strata triangle drift angle down, two-layer up and down median of a triangle staggers, mutually inserted is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620086380 CN2931957Y (en) | 2006-06-23 | 2006-06-23 | Scouring-free cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620086380 CN2931957Y (en) | 2006-06-23 | 2006-06-23 | Scouring-free cut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2931957Y true CN2931957Y (en) | 2007-08-08 |
Family
ID=38348456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620086380 Expired - Fee Related CN2931957Y (en) | 2006-06-23 | 2006-06-23 | Scouring-free cut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2931957Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615554A (en) * | 2013-11-22 | 2014-03-05 | 四川大学 | Anti-scouring valve sealing structure |
| CN104930197A (en) * | 2015-05-19 | 2015-09-23 | 苗蕴博 | Flow regulating valve |
| CN106763979A (en) * | 2017-01-09 | 2017-05-31 | 上海冠龙阀门自控有限公司 | A kind of short ring spray energy dissipating regulating valve |
| CN110454577A (en) * | 2019-08-02 | 2019-11-15 | 南京清研高分子新材料有限公司 | High-temperature sealing valve is used in polyether sulphone production |
-
2006
- 2006-06-23 CN CN 200620086380 patent/CN2931957Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615554A (en) * | 2013-11-22 | 2014-03-05 | 四川大学 | Anti-scouring valve sealing structure |
| CN104930197A (en) * | 2015-05-19 | 2015-09-23 | 苗蕴博 | Flow regulating valve |
| CN106763979A (en) * | 2017-01-09 | 2017-05-31 | 上海冠龙阀门自控有限公司 | A kind of short ring spray energy dissipating regulating valve |
| CN110454577A (en) * | 2019-08-02 | 2019-11-15 | 南京清研高分子新材料有限公司 | High-temperature sealing valve is used in polyether sulphone production |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070808 Termination date: 20120623 |