CN101413590A - Supporting type double-seal double-gate plate flat plate gate valve - Google Patents
Supporting type double-seal double-gate plate flat plate gate valve Download PDFInfo
- Publication number
- CN101413590A CN101413590A CNA2008101197882A CN200810119788A CN101413590A CN 101413590 A CN101413590 A CN 101413590A CN A2008101197882 A CNA2008101197882 A CN A2008101197882A CN 200810119788 A CN200810119788 A CN 200810119788A CN 101413590 A CN101413590 A CN 101413590A
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- voussoir
- wedge block
- lower wedge
- valve
- double
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Abstract
The invention provides an unfurled dual-sealing gate valve, comprising two slab valve plates which are arranged at the left side and the right side in the valve body; the lower end of a valve rod is fixedly connected with an upper wedge; two slab valve plates are fixedly arranged in the horizontal hole which is arranged at the upper and middle part of the upper wedge; a lower wedge is sleeved right below the upper wedge; the upper wedge is provided with an inclined surface which faces outwards from top to bottom; the lower wedge is also provided with an inclined surface which has the same inclined angle with the upper wedge and is corresponding to the inclined surface of the upper wedge; a compression spring is arranged between the upper wedge and the lower wedge; a non-metal sealing ring and a metal sealing ring are arranged in the vertical sealing surfaces on the valve seats at two sides of the slab valve plates corresponding to the slab valve plates; the external side sealing surface of the non-metal sealing ring is higher than the sealing surface of the metal sealing ring, thus forming a dual-sealing structure. The gate valve forms dual main sealing structure between metals and between metal and non-metal, can completely meet the medium transmission working condition at a temperature not more than 230 DEG C, and ensures no leakage.
Description
Technical field
The present invention relates to a kind of gate valve, it is specially adapted to product oil, rock gas, coal gas and temperature and is not higher than 230 ℃ medium and transports operating mode.
Background technique
The development of gate valve has long history, High Temperature High Pressure gate valve from the board-like gate valve of original water channel to the modern times, because it is little that it has a circulating resistance, advantages such as not needing directive restriction is installed, be widely used in the numerous areas of national economy, become the consumption maximum, use one of the widest valve.But, traditional gate valve also has some shortcoming, not high relatively as sealability, existing gate valve can only apply active force by handling valve rod on the direction vertical with pipeline, and it is for along the conduit axis direction, just forms the but not contribution of active force of sealing between the flashboard of gate valve and the valve seat.Have some gate valves to utilize wedge structure in the prior art, making exerts pressure on the voussoir plane of inclination when closing gate valve obtains pressure along the conduit axis direction, thereby makes and obtain better seal between flashboard and the valve seat.But it is big etc. that this class gate valve structure more complicated of the prior art, boundary dimension take up room more greatly, thereby also limited its using scope to a certain extent.And the horizontal force that gate valve of the prior art only produces by voussoir pushes the sealing surface of flashboard and valve seat, and can raise with pressure in the higher operating mode lower seal performance of pressure descends, and this is the current more scabrous problem of gate valve.
Summary of the invention:
The objective of the invention is to improve the problems referred to above of prior art, provide a kind of primary seal structure wherein can satisfy in medium transport supporting type double-seal double-gate plate flat plate gate valve fully the strict occasion of Gate-valve sealing Performance And Reliability.
Supporting type double-seal double-gate plate flat plate gate valve provided by the invention comprise be installed in the valve body about two dull and stereotyped flashboards that are parallel to each other, connect firmly voussoir in the lower end of valve rod, described two dull and stereotyped flashboards are fixedly mounted on described going up in the horizontal hole that the intermediate portion is provided with on the voussoir, on described voussoir under, be set with a lower wedge block, has an outside inclined-plane from top to bottom on the voussoir on described, on lower wedge block, also be provided with an inclined-plane that the angle of inclination is identical, it is corresponding with the described inclined-plane of going up on the voussoir, between last lower wedge block, be provided with a pressure spring, when the described described pressure spring of going up between the lower wedge block is compressed, two inclined-planes on the last lower wedge block contact and along the inclined-plane relative displacement, make to place the described dull and stereotyped flashboard of lower wedge block both sides to be strutted on the sealing surface of seat that presses to described valve body; Be provided with nonmetal seal ring and metal o-ring on vertical sealing surface corresponding with dull and stereotyped flashboard on the valve seat of described dull and stereotyped flashboard both sides, the outside sealing surface of this nonmetal seal ring exceeds the sealing surface of described metal o-ring, constitutes double sealing structure thus.
The described combining structure of going up lower wedge block can be: be provided with one in the middle of this lower wedge block and go up the voussoir receiving hole, last voussoir places in this receiving hole of lower wedge block, the corresponding hole wall of the receiving hole on the end face of last voussoir and two sides and this lower wedge block is complementary, be provided with the gap between the bottom surface of last voussoir and the corresponding hole wall of this receiving hole, described pressure spring is arranged between the corresponding hole wall of the described bottom surface of going up voussoir and receiving hole.
Supporting type double-seal double-gate plate flat plate gate valve provided by the invention can apply a horizontal component by the inclined-plane between the last lower wedge block for two dull and stereotyped flashboards when closing this gate valve, make dull and stereotyped flashboard and valve seat compress, and improves sealing.Characteristics of the present invention are the shape of lower wedge block, the horizontal hole of last voussoir is arranged on the intermediate portion of voussoir, its active force for the extrapolation of dull and stereotyped flashboard is balancedly to act on the dull and stereotyped flashboard of a side, and the characteristics of lower wedge block are that it is provided with receiving hole, it is wherein ccontaining to go up voussoir, then the area of contact of lower wedge block and contacted dull and stereotyped flashboard is just bigger, and when lower wedge block and last voussoir pushed the outside thrust of generation, this thrust can balancedly act on the dull and stereotyped flashboard.Wedge structure up and down so just can be guaranteed balancedly outwards to promote two dull and stereotyped flashboards, makes it balancedly be pressed on the sealing surface of seat, reaches good sealing effect.
Described double seal mechanism makes the sealing surface of the metal o-ring on the valve seat, sealing surface that nonmetallic material are made seal ring and the sealing surface of flashboard by metallic material and forms, nonmetal sealing between the metallic seal between the sealing surface of composition flashboard sealing surface and valve seat metal o-ring and the sealing surface of flashboard sealing surface and seal ring, totally two resealings are so be called double seal mechanism.Its action principle is: when system is full of at the beginning of medium boosts, the valve seal effect is mainly from the seal pressure that forms between flashboard and the seal ring, the sealing surface of sealing structure is less, under the less situation of pressure, can guarantee a better seal effect, and when system pressure continues to be increased to rated working pressure, increase along with valve closing moment, seal ring is compressed, the sealing of seal ring is often just not too reliable, at this moment, formed higher seal pressure between the bigger sealing surface of flashboard sealing surface and valve seat metal o-ring, made valve working in normal state.In addition, when valve or system's generation accident in a single day, nonmetal seal ring is damaged, and the seal pressure between flashboard sealing surface and the sealing surface of seat can be guaranteed the working properly of valve.
Supporting type double-seal double-gate plate flat plate gate valve provided by the invention, reach upward lower wedge block composition bracing type mechanism by two dull and stereotyped flashboards, in the valve opening and closing process, by the outside handwheel of gate valve or transmission device with force transmission to valve rod, make it to produce to-and-fro motion perpendicular to channel direction, and the last voussoir inclined-plane that is connected with valve rod, act on the corresponding with it inclined-plane of lower wedge block, and generation relatively moves, two flashboards have been strutted, make it left and right displacement to the passage axis direction, and generation sealing force, when this power acts on nonmetal seal ring of valve seat and the metal o-ring successively, make to have formed seal pressure between the sealing pair, play the double seal effect of gate valve.Therefore, supporting type double-seal double-gate plate flat plate gate valve provided by the invention, primary seal structure wherein can satisfy in medium transport the strict occasion of Gate-valve sealing Performance And Reliability fully.
Description of drawings
Fig. 1 is the structural representation of supporting type double-seal double-gate plate flat plate gate valve provided by the invention;
Fig. 2 is the main TV structure schematic representation of valve rod and last lower wedge block in the supporting type double-seal double-gate plate flat plate gate valve provided by the invention;
Fig. 3 is the side-looking structural representation of valve rod and last lower wedge block in the supporting type double-seal double-gate plate flat plate gate valve provided by the invention.
Embodiment
As shown in Figure 1, supporting type double-seal double-gate plate flat plate gate valve provided by the invention comprises valve rod 14, and its lower end connects firmly voussoir 12, also is provided with baffle plate 13 on the valve rod above the last voussoir 12.Bracing type mechanism (referring to Fig. 1) on this flashboard is made up of parts such as the dull and stereotyped flashboards 8 of two parallel types, valve rod 14, last voussoir 12, pressure spring 10, spring cushion block 9, lower wedge blocks 11 and last cushion block 3, lower cushion block 1, socket head screws 2.Connect firmly voussoir 12 in the lower end of valve rod 14, two dull and stereotyped flashboards 8 are fixedly mounted in the horizontal hole that the intermediate portion is provided with on the voussoir 14, under last voussoir 12, be set with a lower wedge block 11, be provided with one in the middle of this lower wedge block 11 and go up voussoir receiving hole (see figure 2) 110, last voussoir 12 places in this receiving hole 110 of lower wedge block 11, the corresponding hole wall of the receiving hole 110 on the end face of last voussoir 12 and two sides and this lower wedge block 11 is complementary, be provided with the gap between the bottom surface of last voussoir 12 and the corresponding hole wall of this receiving hole, set firmly a pressure spring 10 between the corresponding hole wall of the bottom surface of voussoir and receiving hole on described, on lower wedge block 11, offer a screw that props up pressure spring 10, the spring cushion block 9 that is spirally connected in the screw is to support pressure spring 10.On last voussoir 12, has an outside inclined-plane from top to bottom, correspondingly, also be provided with an inclined-plane that the angle of inclination is identical on lower wedge block, when the pressure spring between the last lower wedge block 10 was compressed, two inclined-planes on the last lower wedge block contacted and along the inclined-plane relative displacement.The angle of inclination, inclined-plane of last voussoir can be 25 °.
Its operating principle is: when throttle down, the power of closing from valve rod 14 is delivered on the voussoir 12,25 ° of ramp effect by last voussoir 12 are to the inclined-plane at lower wedge block 11 identical inclination angles, thereby produce the active force that is parallel to channel direction, this active force is pushed the dull and stereotyped flashboard 8 of two parallel types in the upper and lower voussoir outside to sealing surface of seat, obtains the seal pressure between needed flashboard and the valve seat.
In the valve closing process; be contained in pressure spring 10 between lower wedge block 11 and the last voussoir 12 along with last; relative displacement between the lower wedge block; be compressed and put aside certain elastic energy; when valve opening; the last voussoir 12 of steering force drive that is transmitted by valve rod 14 moves upward; at this moment; the pressure spring of having put aside certain elastic energy 10 in valve closing discharges elastic energy; on this energy promotes; lower wedge block produces quick relative displacement; two flashboards 8 are closed up to valve rod 14 centers; thereby make flashboard sealing surface and seal ring sealing surface; sealing surface of seat disengages fast, plays and reduces friction relatively, the effect of protection sealing surface.
Supporting type double-seal double-flashboard Flat Sluice provided by the invention is provided with valve seat bearing ring 6 on the valve seat of both sides, between itself and the valve seat Expanded graphite system seal ring 5 and O-ring seals 4 are set.On the vertical side relative with dull and stereotyped flashboard of valve seat bracing ring 6 nonmetal seal ring 7 and metal o-ring are set, the outside sealing surface of this nonmetal seal ring 7 exceeds the sealing surface of described metal o-ring, constitutes double sealing structure thus.
On the valve seat that is positioned under the Flat Sluice plate lower cushion block 1 is set, being spirally connected by socket head screw 2 thereon sets firmly cushion block 3, with this support spring cushion block 9.
Claims (2)
1. supporting type double-seal double-gate plate flat plate gate valve, it is characterized in that, comprise be installed in the valve body about two dull and stereotyped flashboards that are parallel to each other, connect firmly voussoir in the lower end of valve rod, described two dull and stereotyped flashboards are fixedly mounted on described going up in the horizontal hole that the intermediate portion is provided with on the voussoir, on described voussoir under be set with a lower wedge block, has an outside inclined-plane from top to bottom on the voussoir on described, on lower wedge block, also be provided with an inclined-plane that the angle of inclination is identical, it is corresponding with the described inclined-plane of going up on the voussoir, between last lower wedge block, be provided with a pressure spring, when the described described pressure spring of going up between the lower wedge block is compressed, two inclined-planes on the last lower wedge block contact and along the inclined-plane relative displacement, make to place the described dull and stereotyped flashboard of lower wedge block both sides to be strutted on the sealing surface of seat that presses to described valve body; The outside sealing surface that is provided with nonmetal seal ring and this nonmetal seal ring of metal o-ring on vertical sealing surface corresponding with dull and stereotyped flashboard on the valve seat of described dull and stereotyped flashboard both sides exceeds the sealing surface of described metal o-ring, constitutes double sealing structure thus.
2. supporting type double-seal double-gate plate flat plate gate valve according to claim 1, it is characterized in that, be provided with one in the middle of this lower wedge block and go up the voussoir receiving hole, last voussoir places in this receiving hole of lower wedge block, the corresponding hole wall of the receiving hole on the end face of last voussoir and two sides and this lower wedge block is complementary, be provided with the gap between the bottom surface of last voussoir and the corresponding hole wall of this receiving hole, described pressure spring is arranged between the corresponding hole wall of the described bottom surface of going up voussoir and receiving hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101197882A CN101413590A (en) | 2008-09-10 | 2008-09-10 | Supporting type double-seal double-gate plate flat plate gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101197882A CN101413590A (en) | 2008-09-10 | 2008-09-10 | Supporting type double-seal double-gate plate flat plate gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101413590A true CN101413590A (en) | 2009-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101197882A Pending CN101413590A (en) | 2008-09-10 | 2008-09-10 | Supporting type double-seal double-gate plate flat plate gate valve |
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| CN (1) | CN101413590A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454802A (en) * | 2010-10-21 | 2012-05-16 | 江苏省鑫通阀门制造有限公司 | Single-top and dual-pressure sealing device for welding gate valve |
| CN102840355A (en) * | 2012-09-27 | 2012-12-26 | 四川优机实业股份有限公司 | Flat plate gate valve gate plate guide mechanism |
| CN103216633A (en) * | 2013-04-01 | 2013-07-24 | 无锡富盛阀业有限公司 | Small-caliber gate valve |
| CN103498946A (en) * | 2013-09-26 | 2014-01-08 | 浙东高中压阀门有限公司 | Parallel double-gate-disc eccentric deslagging valve |
| CN104225757A (en) * | 2013-06-14 | 2014-12-24 | 北京谊安医疗系统股份有限公司 | Pneumatic-electric linked switch and medical device with same |
| CN104776239A (en) * | 2015-03-30 | 2015-07-15 | 苏州福润机械有限公司 | Wedge type dual gate valve |
-
2008
- 2008-09-10 CN CNA2008101197882A patent/CN101413590A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454802A (en) * | 2010-10-21 | 2012-05-16 | 江苏省鑫通阀门制造有限公司 | Single-top and dual-pressure sealing device for welding gate valve |
| CN102840355A (en) * | 2012-09-27 | 2012-12-26 | 四川优机实业股份有限公司 | Flat plate gate valve gate plate guide mechanism |
| CN103216633A (en) * | 2013-04-01 | 2013-07-24 | 无锡富盛阀业有限公司 | Small-caliber gate valve |
| CN104225757A (en) * | 2013-06-14 | 2014-12-24 | 北京谊安医疗系统股份有限公司 | Pneumatic-electric linked switch and medical device with same |
| CN103498946A (en) * | 2013-09-26 | 2014-01-08 | 浙东高中压阀门有限公司 | Parallel double-gate-disc eccentric deslagging valve |
| CN103498946B (en) * | 2013-09-26 | 2015-10-21 | 浙东高中压阀门有限公司 | The eccentric slag-off valve of double disc parallel seat |
| CN104776239A (en) * | 2015-03-30 | 2015-07-15 | 苏州福润机械有限公司 | Wedge type dual gate valve |
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Open date: 20090422 |