CN201269316Y - Metal sealing plate sluice valve for ethylene cracking furnace - Google Patents
Metal sealing plate sluice valve for ethylene cracking furnace Download PDFInfo
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- CN201269316Y CN201269316Y CNU2008201398088U CN200820139808U CN201269316Y CN 201269316 Y CN201269316 Y CN 201269316Y CN U2008201398088 U CNU2008201398088 U CN U2008201398088U CN 200820139808 U CN200820139808 U CN 200820139808U CN 201269316 Y CN201269316 Y CN 201269316Y
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Abstract
The utility model belongs to a metal sealing flat gate valve, in particular relates to a flat gate valve suitable for being used as a gas cracking valve and a decoking valve in an ethylene cracking furnace, which comprises a main valve body. One side of the main valve body is provided with an auxiliary valve body; the main valve body is connected with the auxiliary valve body through a flange; a sealing groove and a runner are arranged on the main valve body; a sealing groove and the runner are arranged on the auxiliary valve body; the upper part of the main valve body is further provided with a top cover, and the lower part thereof is provided with a bottom cover; a supporting frame is arranged on the top cover and provided with a driving device; sealing rings are arranged in the sealing groove; a valve plate is arranged between the sealing rings; the upper part of the valve plate is provided with a flow guiding hole; the valve plate is connected with a valve rod through a T-shaped groove arranged on the main valve body, and the other end of the valve rod is connected with the driving device; and the main valve body and the auxiliary valve body are connected through bolts. The flat gate valve has the advantages of having nonmetal sealing and metal sealing simultaneously due to the use of multi-layer metal compound sealing rings, reliable sealing and long service life.
Description
Technical field
The utility model belongs to a kind of metallic seal flat plate gate valve, is specifically related to a kind of plate valve of using as cracking air valve and coke cleaning valve of being suitable in the ethane cracking furnace.
Background technique
Cracking air valve and coke cleaning valve are one of key equipments of ethylene cracker, and wherein, the cracking air valve is in order to cut off the total pipeline of cracking gas, and the coke cleaning valve is in order to cut off the coke cleaning pipeline, and cracking air valve and coke cleaning valve alternately switch between three kinds of mode of operations:
1) cracking pattern: the cracking gas opening of valves, the coke cleaning valve cuts out, and pyrolysis furnace is in cracking, and cracking gas and quench oil are mixed and enter separator, and this moment, working condition pressure was 1 crust, temperature is about 250 ℃; Work one-period (about 30～60 days), after, the coking of pyrolysis furnace inwall, efficient reduces, and needs coke cleaning, and valve enters switch mode.
2) switch mode: during the cracking valve " was cutting out ", the coke cleaning valve was in " unlatching ".To cracking valve complete shut-down, coke cleaning valve full-gear enters the coke cleaning pattern.
3) coke cleaning pattern: the cracking air valve is closed, and the coke cleaning opening of valves is when pyrolysis furnace during at coke cleaning, quencher stops oil spout, and the vapor plume that contains coke grain is by the emptying of coke cleaning valve, and this moment, working condition pressure was 0.7 crust, temperature is about 500 ℃ of 400 ∽, and the coke cleaning pattern continues 1～2 day.Valve switches once more, and to cracking valve standard-sized sheet, coke cleaning valve complete shut-down enters the cracking pattern once more, so moves in circles.
A pyrolysis furnace is equipped with a cracking air valve and a coke cleaning valve usually, in recent years, in order to improve switch safety, prevents that cracking gas from flowing backwards and coke cleaning pipeline superpressure, the configuration of three valves occurred, has promptly increased a little coke cleaning valve on original basis.
The medium of cracking air valve and coke cleaning valve is cracking gas and coke cleaning gas, and its composition is very complicated, and pyrolysis product hydrocarbon, CO and CO2 gas, quench oil, water vapor etc. are arranged, and also can produce a large amount of coking particles in coke-removing procedure, is multiphase flow.The cracking gas formation coking that when temperature reduces, can regroup.Therefore as the valve type of cracking air valve and coke cleaning valve, must possess following characteristics:
1) high temperature resistant: as to be up to 600 ℃;
2) anti-particle: refer to that mainly sealing pair can be protected,, cause seal failure in order to avoid covered by particle; Want damage resistant, in order to avoid reveal;
3) anti-coking, coking are meant that cracking gas enters valve pocket, are reduced and polymerization, are solidified and form block by temperature.Anti-scorch is in switch standard-sized sheet position, complete shut-down position and " opening ", " pass " at all, prevents that cracking gas from entering valve pocket.
At present, the valve type of known cracking air valve and coke cleaning valve mainly contains following three types: soft seal plate valve, hard seal plate gate valve and seal Parallel gate valve Parallel slide valve firmly, and this valve of three types all exists certain deficiency and defective:
Soft seal plate valve as shown in Figure 1, soft seal are meant that seal ring material is nonmetal, and before the nineties in 20th century, cracking air valve that moves on China's pyrolysis furnace and coke cleaning valve are the soft seal plate valve of band pod apertures mostly.The defective of soft seal is:
1) life cycle is short.The elevated-temperature seal loop material is generally asbestos, because particle is easy to scratch sealing surface, causes seal failure, needed 1 year to change the once sealing circle, and the repair cycle of ethylene plant changes 3 years into from 1 year, did not satisfy production requirement; Asbestos are unfavorable for environmental protection simultaneously, are used by country's restriction.
2) known plate valve is the design of underlying pod apertures, pod apertures is positioned at the valve plate bottom, valve closing when valve plate descends, in closing closed procedure, the passage that seal ring and pod apertures form is positioned at the bottom, and cracking gas is under the effect of gravity, can enter valve pocket by pod apertures, form coking, gather in valve pocket, it is not in place to cause valve plate to close.
Hard seal plate gate valve as shown in Figure 2, hard sealing is meant that sealing pair is a metal, hard seal plate gate valve generally adopts the floating valve seat sealing configuration, mainly form by floating valve seat, seal ring, pressure ring, spring, the characteristics of this structure are that valve seat can move along channel direction, the main pressure of spring that relies on forms inlet seal, and the sealing of valve seat and valve body guarantees by medium power.The shortcoming of hard seal plate gate valve is:
1) solid particle easily deposits between the slit of floating valve seat, causes the floating valve seat performance failure, causes import to be leaked.
2) hard sealing, machining accuracy and surface finishment require high, are difficult for realizing;
3) friction factor is big, and dyskinesia is easy to generate " jam " phenomenon.
Hard sealing Parallel gate valve Parallel slide valve as shown in Figure 3, it is a kind of Parallel gate valve Parallel slide valve with pod apertures.After the nineties in 20th century, particularly recent years, a lot of users selects this valve type.Its principle is that two parallel valve plates and an expansion joint are installed in the valve plate frame of eyeglass type, utilizes " interior wedge " mechanism that two valve plates are pressed on respectively and imports and exports formation sealing on the valve seat.The shortcoming of this type of valve is:
1) complex structure, movable part is many, and reliability reduces.
2) volume is big, valve is heavy, and the manufacture cost height needs installing space big.
3) in the valve wide open position, expansion joint and valve seat are difficult to sealing, and cracking gas can enter valve pocket, form coking, gather in valve pocket, and it is not in place to cause valve plate to close.
4) metal seat valve is difficult for maintenance, maintenance difficult.
Summary of the invention
The purpose of this utility model is, provides a kind of and overcome soft seal plate valve, hard seal plate gate valve, sealed the metallic seal flat plate gate valve of full guide plate of the shortcoming of Parallel gate valve Parallel slide valve firmly.
The utility model is to realize like this, metallic seal flat plate gate valve for ethylene cracking furnace, it comprises main valve body, one side of main valve body is provided with auxiliary valve body, main valve body is connected by flange with auxiliary valve body, main valve body is provided with seal groove and runner, auxiliary valve body is provided with seal groove and runner, the top of main valve body also is provided with top cover, and the bottom is provided with bottom, and top cover is provided with support, support is equipped with drive unit, be provided with seal ring in the described seal groove, be provided with seal ring in the seal groove, between seal ring and seal ring, be provided with valve plate, the top of valve plate is provided with pod apertures, valve plate is connected with valve rod by the T-slot that is located on the main valve body, and the other end of valve rod is connected with drive unit, is connected by bolt between main valve body and the auxiliary valve body.
On described main valve body, also be provided with unsteady guide plate down, be provided with the guide plate that floats on the auxiliary valve body with on the corresponding position of main valve body, be provided with cluster spring between main valve body and the following unsteady guide plate, be provided with cluster spring between auxiliary valve body and the last unsteady guide plate.
Top at main valve body is provided with interface, and interface is communicated with the valve pocket of main valve body, and the bottom of main valve body is provided with interface, and connecting tube is communicated with valve pocket and passage.
Interface is connected with orifice plate, is provided with pressure gauge between interface and orifice plate, and orifice plate is provided with blow down valve, and interface is connected with escape cock with connecting valve, connecting tube pipeline connection valve pocket and the connecting tube interface that is positioned on the passage.
At least one is the multilayer metal compound seal ring for described seal ring and seal ring.Seal ring also is provided with outward and scrapes circle.
The utility model has the advantages that, use the multilayer metal compound seal ring, have concurrently nonmetal and advantage metallic seal, sealing is reliable, long service life.Overcome the short defective of soft seal plate valve life cycle, can satisfy 3 years life cycles of ethylene plant.Compare with hard seal plate gate valve, it is easier to seal.Compare with the ordinary flat gate valve, on put pod apertures design, avoided in the valve closing process, cracking gas enters valve pocket by pod apertures under the effect of gravity, reduced the coking possibility.When valve plate moved, unsteady guide plate made and is in isolation between valve pocket and the passage all the time, had overcome plate valve in switch " opening " " pass ", and cracking gas enters the defective that valve pocket forms coking.Compare with hard sealing Parallel gate valve Parallel slide valve and to have obvious advantage: simple in structure, reliability height, low cost of manufacture; Maintenance without bedding-in valve plate and valve seat, gets final product the steam blowing system as long as replace seal ring easily.Valve pocket feeds and purges steam, and sets up between valve pocket and passage " sealing gland ".Flowing steam purges continuously, guarantees the valve pocket cleaning; Realize " double seal " " dual discharging ".
Description of drawings
Fig. 1 is known soft seal plate valve schematic representation;
Fig. 2 is known hard seal plate gate valve schematic representation;
Fig. 3 is known hard sealing Parallel gate valve Parallel slide valve schematic representation;
Fig. 4 is a kind of metallic seal flat plate gate valve for ethylene cracking furnace schematic representation provided by the utility model;
Fig. 5 is that the E-E of Fig. 4 is to sectional view;
Fig. 6 is the cross sectional representation of first kind of deformable seal;
Fig. 7 is the cross sectional representation of second kind of deformable seal;
Fig. 8 is the cross sectional representation of the third deformable seal;
Fig. 9 is the cross sectional representation of the 4th kind of deformable seal;
Figure 10 is main valve body and last float plate and the cluster spring structural representation in a kind of metallic seal flat plate gate valve for ethylene cracking furnace provided by the utility model.
Among the figure, the guide plate that floats on 5,6 times unsteady guide plates, 7 bolts, 8 drive units, 9 Stem Muts, 10 main valve bodies, 11 seal grooves, 12 runners, 13 flanges, 15 valve pockets, 16 interfaces, 17 interfaces, 18 valve pockets bottom, 19 stiffening ribs, 20 auxiliary valve bodies, 21 seal grooves, 22 runners, 23 pads, 24 spacers, 28 cluster spring, 30 seal rings, 31 pressure gauges, 32 orifice plates, 33 blow down valves, 34 connecting valves, 35 escape cocks, 36 connecting tube pipeline, 38 connecting tube interface, 40 valve plates, 41 pod apertures, 60 top covers, 61 pads, 70 bottoms, 71 pads, 80 supports, 81 scales, 90 valve rods, 91 pointers, 100 scraping rings, first kind of combining form of 101 scraping rings and seal ring, second kind of combining form of 102 scraping rings and seal ring, the third combining form of 103 scraping rings and seal ring, the 4th kind of combining form of 104 scraping rings and seal ring.
Embodiment
As shown in Figure 4, metallic seal flat plate gate valve for ethylene cracking furnace, it comprises main valve body 10, one side of main valve body 10 is provided with auxiliary valve body 20, main valve body 10 is connected by flange 13 with auxiliary valve body 20, main valve body 10 is provided with seal groove 11 and runner 12, auxiliary valve body 20 is provided with seal groove 21 and runner 22, the top of main valve body 10 also is provided with top cover 60, and the bottom is provided with bottom 70, and top cover 60 is provided with support 80, support 80 is equipped with drive unit 8, be provided with seal ring 30A in the described seal groove 11, be provided with seal ring 30B in the seal groove 21, between seal ring 30A and seal ring 30B, be provided with valve plate 40, the top of valve plate 40 is provided with pod apertures 41, valve plate 40 is connected with valve rod 90 by the T-slot that is located on the main valve body 10, and the other end of valve rod 90 is connected with drive unit 8, is connected by bolt 7 between main valve body 10 and the auxiliary valve body 20.On described main valve body 10, also be provided with unsteady guide plate 5 down, be provided with the guide plate 6 that floats on the auxiliary valve body 20 with on the main valve body 10 corresponding positions, be provided with cluster spring 28 between main valve body 10 and the following unsteady guide plate 5, be provided with cluster spring 28 between auxiliary valve body 20 and the last unsteady guide plate 6.Be provided with interface 16 on the top of main valve body 10, interface 16 is communicated with the valve pocket 15 of main valve body 10, and the bottom of main valve body 10 is provided with interface 17, and connecting tube 36 is communicated with valve pocket 15 and passage 12.Interface 16 is connected with orifice plate 32, is provided with pressure gauge 31 between interface 16 and orifice plate 32, and orifice plate 32 is provided with blow down valve 33, and interface 17 is connected with escape cock 35 with connecting valve 34, connecting tube pipeline 36 be communicated with valve pockets 15 and be positioned at connecting tube interface 38 on the passage 12.At least one is the multilayer metal compound seal ring for described seal ring 30A and seal ring 30B.Metallic seal flat plate gate valve for ethylene cracking furnace as claimed in claim 5, seal ring also are provided with outward and scrape circle.
The technological scheme that the utility model adopted comprises valve body, seal ring, top cover, bottom, valve plate, guide plate, valve rod, drive unit and Sealing.The valve body cross section is ellipse or rectangle, is made up of main valve body, auxiliary valve body, and major and minor valve body connects with bolt; All be processed with seal groove on the major and minor valve body, in seal groove, be inlaid with seal ring, form the double seal of main valve body seal ring and valve plate, auxiliary valve body seal ring and valve plate, sealing force between two seal rings and the valve plate is provided by the connecting bolt of major and minor valve body, and the big I of sealing force is adjusted by the height of spacer on the auxiliary valve body.Valve rod adopts T type groove to be connected with valve plate, and drive unit drives the Stem Mut rotation, valve rod is moved up and down, switch valve.
Seal ring adopts the multilayer metal compound seal ring, and this kind seal ring was described in detail in patent ZL200620148479.4, comprised nonmetal band of multilayer and multiple layer metal band, and nonmetal band and metal tape are glued together by binder.Metal tape is " skeleton ", makes composite sealing ring have certain intensity and rigidity, guarantees wear resistance and working life, protects nonmetal band not scratched, tear or blow mistake by medium.Nonmetal band is " sealing ", makes composite sealing ring have suitable elasticity, guarantees sealing, is the main body of sealing.The metal composite seal ring has concurrently nonmetal and advantage metallic seal, promptly seals reliable, wear-resistant, long service life.Be particularly suitable for high temperature, contain crystal, bad working environments such as particle.
Different with known plate valve underlying pod apertures design, the utility model valve plate top is provided with pod apertures, and the bottom is a sealing surface, the diameter of pod apertures is identical with valve seat, valve opening when valve plate descends, valve closing when valve plate rises is in the valve closing process, the passage that seal ring and pod apertures form is positioned at top, avoided cracking gas under the effect of gravity, entered valve pocket, formed coking by pod apertures, in valve pocket, gather, cause valve plate to close risk not in place.
Two unsteady guide plates are installed on the valve body, there is axis pin of the spring mounting spring group (to be known technology on it, not shown), under the effect of spring force, the guide plate that floats is close to valve plate all the time when valve plate moves, and valve plate is motion seamlessly in two guide plates, all the time be in isolation between valve pocket and the passage, cracking gas can not enter valve pocket, forms coking, gathers in valve pocket.
Valve body top is provided with the inlet that purges steam, and valve body lower portion is provided with connecting port, is communicated with valve pocket and passage, makes flow of steam.Valve pocket feeds and purges steam, the high at least 0.5bar of vapour pressure ratio pressure medium, and vapor (steam) temperature is higher than the setting temperature of medium.The effect of steam is:
1) set up " sealing gland " between valve pocket and passage, because the pressure of steam is higher than pressure medium, the mass exchange between valve pocket and the passage can only be the steam flow channel in the valve pocket, can not be that the medium in the passage flows into valve pocket.As the cracking air valve, particularly in " unlatching " process, prevent that cracking gas from entering valve pocket and forming coking;
2) temperature of maintenance valve body prevents that the cracking gas that enters valve pocket from solidifying, coking;
3) cleaning valve pocket, the cracking gas with valve pocket purges away through discharge pipe;
As shown in Figure 4, metallic seal flat plate gate valve comprises main valve body 10, is processed with seal groove 11 on it, and seal groove is inlaid with seal ring 30A.Seal ring is preferentially selected the metal composite seal ring for use, also can select the seal ring of other material for use.One end of main valve body 10 is runners 12, and the other end is a flange 13, in order to auxiliary valve body 20 to be installed, runner 22 and seal groove 21 is arranged on the auxiliary valve body, and seal groove is inlaid with seal ring 30B.It also can be welding that valve body can be cast, and schematic structure in order to guarantee the strength and stiffness of valve body, has designed several stiffening ribs 19 for welding on the valve body.
The upper and lower part of main valve body 10 is equipped with top cover 60 and bottom 70 respectively, all with being spirally connected, pad 21, pad 61 and pad 71 is housed in the middle of three and the main valve body between auxiliary valve body, top cover, bottom and the main valve body, in order to sealing valve pocket 15.Support 80 is set on the top cover, and in order to drive unit 8 to be installed, drive unit can be handwheel, cylinder, fluid cylinder or Electric actuator etc.
Valve plate 40 is housed between seal ring 30A, the 30B, and valve plate 40 tops have pod apertures 41, and the diameter of pod apertures 41 and runner 12, runner 22 are identical, the bottom is a sealing surface, valve opening when valve plate 40 descends, valve closing when valve plate rises is in the valve closing process, the passage that seal ring and pod apertures form is positioned at top, avoided medium under the effect of gravity, entered valve pocket, formed coking by pod apertures, in valve pocket, gather, cause valve plate to close risk not in place.
Valve rod 90 and valve plate 40 are connected by T-slot, and valve rod 90 is by driving at this unspecified drive unit 8, and drive unit can be handwheel, cylinder, fluid cylinder or Electric actuator etc., drive unit drives Stem Mut 9 rotations, the drive valve plate moves up and down, switch valve
When valve was in fully open position, pod apertures 41 and runner 12, runner 22 were coaxial, and seal degree is with to close the position consistent, and seal ring is protected by valve plate fully, can not be subjected to the erosion of fluid.
When valve is in the complete shut-down position, runner 22 is blocked by valve plate fully, and same seal ring is protected by valve plate fully, can not be subjected to the erosion of fluid.
Sealing force between two seal rings and the valve plate is provided by bolt 7, and bolt is provided with spacer 24, and the decrement of control seal ring in case valve plate is held tension, influences valve event.
Be separately installed with down unsteady guide plate 5 on main valve body 10 and the auxiliary valve body 20, with last unsteady guide plate 6, cluster spring 28 is set on the valve body both sides, under the effect of spring force, the guide plate that floats is close to valve plate all the time when valve plate moves, valve plate is motion seamlessly in two guide plates, is in isolation between valve pocket 15 and the medium channel all the time.
Valve body top is provided with interface 16, feeds steam by 16 to valve pocket 15, and vapor pressure should be than the high at least 0.5bar of the pressure in the runner, and valve body lower portion is provided with interface 17, and connecting tube 36 is communicated with valve pocket 15 and passage 12.The steam that flows constantly purges valve pocket, will accumulate in the medium of valve pocket bottom 18, and purging is gone out, and keeps the valve pocket cleaning.
Typical purge system by pressure gauge 31, orifice plate 32, blow down valve 33, connecting valve 34, escape cock 35 and connecting tube pipeline 36 form.Orifice plate 32 controls enter the vapor pressure and the flow of valve pocket, and escape cock is in order to blowdown.
The purging amount should change according to the state of valve, and typical purging process is:
1) valve is in the standard-sized sheet position: blow down valve 33 and escape cock 35 are closed, and connecting valve 34 is opened, and this moment, steam flow was controlled by orifice plate 32, and steam consumption is low dose of the purging seldom.Because vapor pressure is higher than the pressure medium in the passage in the valve pocket, medium can not enter valve pocket, opens the position and realizes " double seal ", " dual discharging "
2) valve is in the complete shut-down position: blow down valve 33 and escape cock 35 are closed, and connecting valve 34 is opened, and this moment, steam flow was controlled by orifice plate 32, and steam consumption also is low dose of the purging seldom.Pressure medium is pressed to the outlet side seal ring with valve plate, has strengthened the outlet side sealing, and suction side, because the vapor pressure in the valve pocket is higher than the pressure medium in the passage, the medium of inlet passage can not enter valve pocket.Off-position is realized " double seal ", " dual discharging "
3) valve is in switching: blow down valve 33 and escape cock 35 are opened, and connecting valve 34 is closed, and this moment, steam flow was controlled by blow down valve 33, absolutely purged, and flowed into runner from valve pocket through pod apertures because the valve pocket vapor pressure, forms steam greater than operation pressure; Put the pod apertures design on adding, avoided medium under the effect of gravity, to enter valve pocket; And the guide plate that floats makes and is in isolation between valve pocket and the medium channel all the time, has avoided condensation product such as tar to enter in the valve pocket, more than three kinds of measures, solved plate valve to greatest extent when switching, medium enters the critical defect that valve pocket forms coking.
Four kinds of distortion of sealing as shown in Figure 5, the something in common of four kinds of distortion is: the metal composite seal ring is the main body of sealing, in each case, sealing all is embedded in the valve seal groove, and the sealing force between itself and the valve plate is provided by the connecting bolt of major and minor valve body.
Fig. 6～Fig. 9 is the cross sectional representation of four kinds of deformable seals.Fig. 6 is a basic model; Fig. 7, Fig. 8, Fig. 9 are the combination seal type; form by metal composite seal ring and scraping ring; the height of scraping ring is generally low than metal composite seal ring end face; its effect is the protection composite sealing ring, and as " scraper ", " scraping " falls particle in the medium, coking etc.; increase the service life, be easy to install, change.
Fig. 6 is a basic model, has only the metal composite seal ring, is applicable to the medium of comparison cleaning;
Fig. 7 metal composite seal ring is embedded in scrapes ring outer surface, is applicable to the medium of light pollution.
Fig. 8 metal composite seal ring is embedded in the groove of scraping ring, is applicable to the medium of heavily contaminated, i.e. particle, the more operating mode of dust are such as cracking air valve and coke cleaning valve.
Fig. 9 metal composite seal ring is embedded in the groove of scraping ring, and the bottom of metal ring includes sealing gasket, is applicable to the operating mode higher to seal request.
The utility model, also can be used for high temperature, contains particle or crystallization takes place, solidifies operating mode with cracking air valve, coke cleaning valve applicable to ethane cracking furnace.Also can be used for high temperature, contain particle or crystallization takes place, solidify operating mode.
Claims (6)
1. metallic seal flat plate gate valve for ethylene cracking furnace, it comprises main valve body (10), one side of main valve body (10) is provided with auxiliary valve body (20), main valve body (10) is connected by flange (13) with auxiliary valve body (20), main valve body (10) is provided with seal groove (11) and runner (12), auxiliary valve body (20) is provided with seal groove (21) and runner (22), the top of main valve body (10) also is provided with top cover (60), the bottom is provided with bottom (70), top cover (60) is provided with support (80), support (80) is equipped with drive unit (8), it is characterized in that: be provided with seal ring (30A) in the described seal groove (11), be provided with seal ring (30B) in the seal groove (21), between seal ring (30A) and seal ring (30B), be provided with valve plate (40), the top of valve plate (40) is provided with pod apertures (41), valve plate (40) is connected with valve rod (90) by the T-slot that is located on the main valve body (10), the other end of valve rod (90) is connected with drive unit (8), is connected by bolt (7) between main valve body (10) and the auxiliary valve body (20).
2. a kind of metallic seal flat plate gate valve for ethylene cracking furnace as claimed in claim 1, it is characterized in that: on described main valve body (10), also be provided with unsteady guide plate (5) down, be provided with the guide plate (6) that floats on auxiliary valve body (20) and on the corresponding position of main valve body (10), be provided with cluster spring (28) between main valve body (10) and the following unsteady guide plate (5), be provided with cluster spring (28) between auxiliary valve body (20) and the last unsteady guide plate (6).
3. a kind of metallic seal flat plate gate valve for ethylene cracking furnace as claimed in claim 1, it is characterized in that: be provided with interface (16) on the top of main valve body (10), interface (16) is communicated with the valve pocket (15) of main valve body (10), the bottom of main valve body (10) is provided with interface (17), and connecting tube pipeline (36) is communicated with valve pocket (15) and is positioned at connecting tube interface (38) on the passage (12).
4. a kind of metallic seal flat plate gate valve for ethylene cracking furnace as claimed in claim 3, it is characterized in that: interface (16) is connected with orifice plate (32), between interface (16) and orifice plate (32), be provided with pressure gauge (31), orifice plate (32) is provided with blow down valve (33), interface (17) is connected with escape cock (35) with connecting valve (34), also is connected with connecting tube (36) between connecting valve (34) and the escape cock (35).
5. a kind of metallic seal flat plate gate valve for ethylene cracking furnace as claimed in claim 1 is characterized in that: at least one is the multilayer metal compound seal ring for described seal ring (30A) and seal ring (30B).
6. a kind of metallic seal flat plate gate valve for ethylene cracking furnace as claimed in claim 5 is characterized in that: seal ring also is provided with scraping ring (100) outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201398088U CN201269316Y (en) | 2008-10-16 | 2008-10-16 | Metal sealing plate sluice valve for ethylene cracking furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201398088U CN201269316Y (en) | 2008-10-16 | 2008-10-16 | Metal sealing plate sluice valve for ethylene cracking furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201269316Y true CN201269316Y (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201398088U Expired - Lifetime CN201269316Y (en) | 2008-10-16 | 2008-10-16 | Metal sealing plate sluice valve for ethylene cracking furnace |
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| Country | Link |
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| CN (1) | CN201269316Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725722B (en) * | 2008-10-16 | 2011-09-21 | 北京航天石化技术装备工程公司 | Metallic seal flat plate gate valve for ethylene cracking furnace |
| CN104315173A (en) * | 2014-08-18 | 2015-01-28 | 洪元生 | Double-segment seal gate valve |
| CN110540859A (en) * | 2019-08-16 | 2019-12-06 | 中国石油化工股份有限公司 | Coke discharging assembly of single-gate cracking air valve and coke discharging method |
| WO2020034599A1 (en) * | 2018-08-16 | 2020-02-20 | 北京航天动力研究所 | Double-disc gate valve and use |
-
2008
- 2008-10-16 CN CNU2008201398088U patent/CN201269316Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725722B (en) * | 2008-10-16 | 2011-09-21 | 北京航天石化技术装备工程公司 | Metallic seal flat plate gate valve for ethylene cracking furnace |
| CN104315173A (en) * | 2014-08-18 | 2015-01-28 | 洪元生 | Double-segment seal gate valve |
| WO2020034599A1 (en) * | 2018-08-16 | 2020-02-20 | 北京航天动力研究所 | Double-disc gate valve and use |
| US11131395B2 (en) | 2018-08-16 | 2021-09-28 | Beijing Aerospace Propulsion Institute | Double-plate gate valve and use of the same |
| CN110540859A (en) * | 2019-08-16 | 2019-12-06 | 中国石油化工股份有限公司 | Coke discharging assembly of single-gate cracking air valve and coke discharging method |
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Granted publication date: 20090708 Effective date of abandoning: 20081016 |