CN201666367U - High-pressure sealing cover structure without bending moment - Google Patents
High-pressure sealing cover structure without bending moment Download PDFInfo
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- CN201666367U CN201666367U CN2009201507215U CN200920150721U CN201666367U CN 201666367 U CN201666367 U CN 201666367U CN 2009201507215 U CN2009201507215 U CN 2009201507215U CN 200920150721 U CN200920150721 U CN 200920150721U CN 201666367 U CN201666367 U CN 201666367U
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Abstract
The utility model relates to a high-pressure container sealing cover structure without bending moment, which comprises the main parts such as a flange at the container end, a gasket, a sealing cover, a connecting bolt and a nut, and the key part is a sealing bowl or a sealing cylinder on the cover without bending moment. A first type of sealing bowl structure can be formed by the gasket at the periphery and an arched cover in the middle; the sealing gasket is bowl-shaped, namely the shape of a disk with an arched seal head, instead of the traditional annular circle or ring shape. A second type of sealing bowl structure can be formed by only the arched cover in the middle, without the gasket at the periphery; and the gasket is still in the type of the traditional gasket. The sealing cylinder is formed by the deformation of the arched seal head of the sealing bowl. Both the two types of structures can comprise a multi-layer plate or be provided with reinforcing ribs. The high-pressure container sealing cover structure not only can prevent bending moment caused by the high-pressure medium acting on the circular sealing cover of the traditional flat plate, and improve the stress of a sealing system so as to be capable of reducing the thickness of the sealing cover and improving the sealing effect, but also can play the role of the traditional gasket, and ensure the safe operation of large-sized high-pressure equipment with an opening.
Description
1, technical field
The utility model is about the no moment of flexure structure of high pressure sealing lid, belongs to mechanized equipment engineering mesohigh container particularly material internals import and export sealing cover, the manhole cover of all kinds of reactors, is applicable to the end seal of high pressure heat exchanger channel structure simultaneously.Specifically can be used in the High Temperature High Pressure opening sealing of petroleum refining and chemical industry, Coal Chemical Industry, chemical fertilizer, nuclear power institution or the like, the normal temperature that also can be used for the overvoltage test operation of these device fabrication checkout procedures seals.
2, background technique
Any pressurized container is equipped with material or internals are imported and exported, for overhaul, work such as cleaning, overwhelming majority pressurized container also is provided with manhole (lowest calibre 450mm) with convenient turnover, and the sealing of these perforates generally is made up of main parts size such as flange, pad, sealing cover and connecting bolt and nuts.Band bobbin carriage high pressure tube bank shown in Figure 1.Wherein sealing cover is the circular dull and stereotyped of a peripheral band bolt hole, and the manhole sealing cover thickness of middle and low-pressure vessel is little, but the thickness of high-pressure bottle manhole sealing cover is very big.
By contrast, the end seal of high pressure heat exchanger channel structure lid is because of the minimum 800mm of its diameter, generally reach 1200mm, and is big more than manhole, so its thickness is bigger, have in addition have to abandon common sealing cover structure and adopt other complicated sealing configurations.
The operation medium overwhelming majority of petroleum refining and chemical industry, Coal Chemical Industry, chemical fertilizer plant high temperature and high pressure containers and heat exchanger is inflammable and explosive, and whether its opening sealing can examine is the key of equipment and device safe operation.
(1) structure function of existing high pressure sealing
Since steamer is the mechanical revolution of representative, the mankind did not stop high-pressure bottle treatment process and sealing technique thereof, several typical high pressure seal structure with hydrogenation plant in petroleum refining and the chemical industry is representative: common big flange type heat exchanger sealing, threaded collar locking heat exchanger shown in Figure 2, the sealing of Ω shown in Figure 3 ring, shown in Figure 4 be the generalized section of a typical tube still type floating head heat exchanger, its bobbin carriage end seal is formed by ellipse head and bobbin carriage pipe nipple assembly welding, is not easy to the maintenance to tube bank.The opening sealing configuration of high temperature and high pressure containers should reasonably be selected according to different service conditions, selects for use threaded collar locking and Ω ring sealing configuration pattern comparatively reasonable.
Existing several sealing configuration abbreviated functional description is as follows.
1) threaded collar locking heat exchanger bobbin carriage sealing
Main structure characteristics:, then be applicable to the maintenance of High Temperature High Pressure heat exchanger if Fig. 4 and Fig. 5 bobbin carriage end ellipse head are changed into Fig. 6 and threaded collar locking sealing configuration shown in Figure 7.
Advantage is: a) sealability is reliable; (b) metal consumption is few; (c) compact structure, floor space is little.Specifically, bolt load is little, so bolt is little, is convenient to tighten; On-stream have the means of stopping a leak as the string leakage takes place between the shell journey; The flange interface is few, but has reduced many leakage points.Compare its advantage with Steel Washer sealing configuration (octangonal ring, oval ring): sealing reliability is good, can bolt at the operation operation type and in time get rid of medium and outside leakage, and metal consumption is less.Contrast situation with other different structure heat exchanger bolt sizes: under the design condition of pressure 17.65MPa, 430 ℃ of temperature, internal diameter 900mm, bolt specification * the quantity of blind flange type sealing is M85 * 20 piece, and the bolt specification * quantity of threaded collar locking sealing is M38 * 40 piece.
Shortcoming is: the structure more complicated, and Common Difference ﹠ Cooperation require tighter, and designing and calculating is loaded down with trivial details, and machined piece is more, and the dismounting complexity involves great expense; Accurately leak in the medium between the drain shell side; The field-strip complexity, the tube head leak test needs independent pressure testing housing, not only maintenance inconvenience, and increase equipment investment cost.Generally also only when pressure is higher than 10MPa, just consider employing abroad.
The problem that should note in design, the use: because its complex structure must carry out careful calculating in design; Guarantee that enough bobbin carriage end thread engagement height (being not less than 6 millimeters) reach the variation that as far as possible limits the thread engagement height; The tube bank dismounting will be used special clamping apparatus, to protect the bobbin carriage king-bolt; Using process must guarantee that the pressure reduction between the shell journey is no more than the design code value; In maintenance, when finding the distortion of relevant part or damaging, must in time change above specified value.
2) Ω ring sealing configuration
This is a kind of novel high pressure heat exchanger sealing configuration, has used the hydrogenation heat exchanger of this structure in 1,200,000 tons of/year hydrogenation plants of Fushun No.3 Petroleum Factory.With five hydrogenation heat exchangers of oil three factories is example, adopts Ω ring sealing configuration to compare with the screw-threaded coupling ring structure, and 3,600,000 yuan of one-time investments are saved in 53.38 tons of weight savings, reach 26.7%.
This structure and flange metal ring pad sealing configuration appearance similar, different is with the metal ring replacement plain carbon steel packing ring of sectional shape as omega, see schematic representation 8, Fig. 9 is the Ω ring sealing configuration 1 between Fig. 8 middle shell, and Figure 10 is the Ω ring sealing configuration 2 of bobbin carriage end among Fig. 8.
Structural feature: Ω ring sealing configuration equipment kingbolt has less pretension and operation load, has reduced the size and the weight of vessel flange and kingbolt.Because the special Connecting format of Ω ring sealing configuration has guaranteed the cocksure sealing of high pressure-temperature heat exchanger.
Compare with the Steel Washer sealing configuration (octangonal ring, oval ring), the thread-locking ring sealing configuration that generally adopt, Ω ring sealing configuration has both advantages concurrently: field-strip is convenient, the absolute characteristics such as reliable of sealing, have simultaneously make simple, cost is low and diameter, pressure, the wide advantage of temperature applicable range.
3) common big flange type sealing
Figure 11 and shown in Figure 12 be the sealing of common big flange type manhole or heat exchanger, its packing ring is the metal octangonal ring.
4) cover plate soldering and sealing formula heat exchanger
The welding close joint often as the supplementary means of other main sealing configurations, does not generally use separately.Combined by two and half C shapes ring counterpart as Fig. 9 and Ω ring sealing configuration shown in Figure 10, the combination mouth at its top just needs by the welding close joint.
(2) problem of conventional high-tension sealing configuration existence
Though people have done long-term effort at high temperature and high pressure containers opening seal aspect, the strengthening effect of conventional construction especially along with the going deep into of application in practice, it is found that also there are some disadvantageous places in these structures itself not enough.Subject matter is two aspects.
The first, complex structure: as the sealing of threaded collar locking heat exchanger bobbin carriage, outer depression bar, seal disc and the top fastening bolt among Fig. 7 all is easily damaged partss.Need manually bolt on when leaking appears in sealing and regulate compensation.
The second, need high-caliber welding: as the seal weld of thin-walled Ω ring structure.
The 3rd, structure is huge: as common big flange type sealing, flange and cover plate are very thick, and not temperature compensated adjusting.
The 4th, structure often ftractures, and is dangerous, difficult in maintenance.
Complicated or the huge structure manufacturing cycle is long, operating cost is high, assembly and disassembly trouble, inconvenient maintenance.Particularly install during the overhaul, can shorten 1 day repair time can both produce remarkable benefit.
Figure 11 is the common big flange type sealing of container manhole opening, and its packing ring is the metal octangonal ring.Figure 12 is the common big flange seals in heat exchanger tube sheet both sides, and the packing ring of its both sides all is metal octangonal rings.Figure 13 is the another kind of traditional structural type that is used for manhole sealing, usefulness be plain cushion.All opening seal groove structures of high temperature and high pressure containers all have strict manufacturing technology requirement, there are many problems in the trapezoidal seal groove of hydrogenator flange in the engineering reality, even manhole cover seal groove bottom intensive crackle (reference: Li Rongrong, Chen XueDong, Li Pingjin etc. to field test and genetic analysis () thereof in labour hydrogenator defective---the crackle [J] in the big lid inwall of reactor wall and manhole, pressurized container, 26 (3): 30-36).
In to the hydrofining reactor third pary certification, find in April, 2000, in manhole flange T type seal groove and manhole cover T type seal groove, exist a large amount of dendroids and netted radial cracking along the radial distribution in the manhole center of circle, circumferential crack is also arranged, after reprocessing crackle, the repair scheme of working out by original manufacturer puts into operation, the surface crack of hoop has appearred again being mainly in same area behind the 2a, be dendroid and netted (reference: Wu Yuxin, hydrofining reactor seal groove Cracking analysis and man-rate [J], petrochemical equipment, 2004,33 (3): 69-70).
At the beginning of 2009 4 months, China's offshore oil Huizhou oil refining hydrocracking unit 106-R-101B smithwelding reactor (φ 4400mm), carry out air tightness test again after the on-the-spot hydrostatic test passed examination through being not less than 34MPa pressure, find the many places leak source when pressure is slightly larger than 13MPa in the airtight process of nitrogen, comprise the flange ring joint of the thermocouple socket of the discharge opening of 4 φ 200 bores and 4 φ 150 bores.Careful detection finds that the dovetail groove sealing surface is all more coarse, and indivedual groove faces have very small cut, influence the sealing of flange.Wherein have the dovetail groove centre distance of two φ 200 bores bigger than normal, knuckle is bigger than normal at the bottom of the dovetail groove of φ 200 bores, has influenced the fit quality with the metal octangonal ring.The same period, in the aromatic device equipment installation process, check to find that a collection of T shape sealing groove faces such as the DN750 opening of the DN600 opening of 111-R-502 disproportionation reactor (φ 5300mm) and DN800 opening, R-701 isomerization reactor (φ 4700mm) and DN950 opening are coarse or in various degree scar is arranged.
As seen the generality of such problem, seriousness and intractable, the further improvement of the opening sealing configuration of conventional high-temperature high pressure harm pressure medium container has become problem demanding prompt solution in the current petroleum chemical engineering construction development.
(3) technique direction of solution conventional high-tension sealing configuration problem
About the opening sealing of reactor, people are making great efforts to improve the fit quality of sealing system element always, mainly comprise precision and surfacing quality, but the artificer think that this not enough.Analyze above-mentioned sealing configuration, all be not converted into the load of drawing of bolt acting on interior pressure on the end cap, end cap bears than macrobending load under interior pressure effect, the flexural load of end cap becomes the flexural load of bolt again, bolt bears load and the two kinds of effects of flexural load of drawing simultaneously, because bolt is elongated rod shaped structure and surface the screw thread that causes the concentrated fracture of stress is easily arranged, bear the flexural load weakness of bolt just.Therefore end cap must design very thickly, and bolt must design very slightly.
This shows, should improve the force-bearing situation of seal plate dome on the structure at all, particularly change the sealing cover structure, avoid this moment of flexure corner at the bottom of seal groove to cause and open effect, avoid cracking to reduce the moment of flexure that pressure causes in it.Improve in conjunction with the problem that the conventional high-tension sealing configuration exists, the new structure that development structure is simple, easy to loading and unloading has very strong engineering significance.
3, summary of the invention
The utility model is about the no moment of flexure structure of a kind of high pressure sealing lid, and purpose is to overcome the shortcoming of existing high pressure sealing technology and structure with not enough.The sealing cover sealing configuration is made up of main parts size such as container end portion flange, pad, sealing cover and connecting bolt and nuts, and its critical component is seal bowl or the sealing drum that no square covers.Seal bowl (no square lid) structure a kind of can be covered two-part structure by the arch of the pad (circle) of periphery and centre and form, and gasket seal is not that traditional circle is circular, but bowl-type, i.e. discoid with the arch end socket.Second kind of pad (circle) that can only not have periphery of seal bowl (no square lid) structure by the intermediate arches lid, pad (circle) is still independent pad (circle) form of tradition, and sealing drum then is the distortion of seal bowl arch end socket.The novel seal dish can be avoided high-pressure medium to act on causing moment of flexure on the sealing cover, improve the stressed of sealing system, thereby the thickness of energy attenuate sealing cover improves sealing effect, may play the effect of conventional spacers (circle) again, guarantees the safe operation of large scale opening high-tension apparatus.Figure 14, Figure 15 and Figure 16 are respectively one of seal bowl (no square lid) structural type, and its principle of work and power is seen accompanying drawing and relevant explanation.
Specify as follows:
(1) the peripheral pad (circle) and the intermediate arches lid of composition seal bowl (no square lid) can be the manufacturings of whole raw material, process by forging blank or a very thick steel plate turning, also can be pressed into the arch lid in the middle of the thicker steel plate, pad (circle) is processed in peripheral turning, can also be that the thin sheet pack of several layers is pressed into that the multilayer arch covers, periphery welds turning together and is processed into pad (circle) in the middle of together.
(2) the peripheral pad (circle) and the intermediate arches lid of composition seal bowl (no square lid) can be that separately two identical or different raw materials are made, but the pad (circle) of seal bowl (no square lid) periphery is a metal base, can make by same block of material disjunctor with the arch lid of centre, weld together with the arch of centre lid again after also can making separately, its structural type can be smooth flat, the ripple flank of tooth, lines sealing surface, also can be the combination of other non-metallic fillers such as these sealing surfaces and graphite.
(3) the peripheral pad (circle) and the intermediate arches lid of composition seal bowl (no square lid) can be that separately two identical or different raw materials are made, but the arch lid in the middle of the seal bowl (no square lid) is a metal base, can make by same block of material disjunctor with the pad (circle) of periphery, can weld with the pad (circle) of periphery again after also can making separately, its structural type can be spherical cap, oval lid, round barrel cover, also can be the combination of several structural types; Can be the individual layer arch lid that a very thick steel plate is pressed into, also can be the multilayer arch lid that the thin sheet pack of several layers is pressed into together.
(4) reinforcement not in the arch of seal bowl (no square lid) intermediate arches lid, but also reinforcement, but rib generally contact with the sealing cover inner side surface, if the arch lid is highly greater than the cylindric lid of diameter, then rib can weld together with the sealing cover inner side surface.
(5) pad (circle) of seal bowl (no square lid) periphery and middle arch lid two-part are welded to form the fusion structure that one becomes seamless defective, perhaps seal bowl (no square lid) intermediate arches lid and circular dull and stereotyped end cap two-part are welded to form the fusion structure that one becomes seamless defective, in the high pressure sealing of two kinds of structural types lid is suffered the arch lid of pressure effect by the centre to around passed to peripheral pad (circle), no longer occur in the sealing cover or the only very small moment of flexure effect of appearance, become no moment of flexure sealing.
(6) if after the pad (circle) of seal bowl (no square lid) periphery and middle arch lid two-part are welded to form one, both become the fusion structure of seamless defective, suffered inner pressure medium is covered in high pressure sealing can't be penetrated into sealing cover by the arch lid of centre, dielectric leakage no longer appears in the sealing between pad (circle) and the sealing cover, and the two sides sealability that original pad (circle) is necessary is changed into the single face sealing of only satisfying between pad (circle) and the container end portion flange and got final product.
(7) to compare variation bigger when the design temperature of container or operating temperature and the room temperature of seal bowl (no square lid) when installing, when the confined space that forms between the arch lid of seal bowl (no square lid) and the sealing cover is also big, need duct that this confined space design is connected with container or atmosphere conditionally, but perhaps in this confined space filling be subjected to the little foamed plastics of influence of temperature change to reduce the air that expanded by heating produces pressure.
(8) seal bowl (no square lid) intermediate arches lid can not be the shape of similar ellipse head or bowl-type end socket, cover two part assembly weldings and forms but be decomposed into little cylindrical shell and sealing arch, and promptly arch covers to become and is cover.
(9) seal bowl (no square lid) but in the middle of the arch lid be subjected to the influence of temperature change expanded by heating to produce the trend that radially increases, produce the trend that radially increases with perforated container flange or end flange expanded by heating and be consistent.
Acting on draw load and the easy manufacturing process thereof that interior pressure on the end cap is converted into bolt is the greatest feature of present technique innovation.With traditional comparing, owing to end cap no longer bears than macrobending load under interior pressure effect, so end cap can design thinlyyer; After bolt no longer bears the flexural load of end cap, also can design carefullyyer; Bobbin carriage end cylinder thickness or flange thickness be obvious attenuate also.
The conventional high-tension heat exchanger is extensively used in heat exchangers such as various oil refining, chemical industry, chemical fertilizer, air cooling muchly, and has produced huge economic benefit.Seal bowl (no square lid) this new structural principle and manufacturing technology will also produce remarkable economic efficiency.In recent years, along with crude oil poor qualityization and energy crisis, country strengthened the management to energy-saving and emission-reduction, and enterprise pays much attention to high efficient heat exchanging new technology and application thereof in enhancing efficiency by relying on tapping internal latent power, and this application for this patented technology provides good condition.
4, description of drawings
Fig. 1 is a typical tube still type floating head heat exchanger, forms tube bank 23 by heat exchanging tube 22, forms integral body with housing 24, bobbin carriage 25 etc. again, and its bobbin carriage end seal is formed by ellipse head and bobbin carriage pipe nipple assembly welding.
Threaded collar locking bobbin carriage sealing configuration shown in Figure 2,1-bobbin carriage housing; The 2-fixing bolt; The 3-fixing bolt; The 4-channel cover; 5-pad pressing plate; The 6-retaining ring; The 7-thread-locking ring; The 8-hold-down ring; 9-tube side pad; 10-three cyclizations; The 11-inner flange; 12-tube side opening is taken over; The 13-seal arrangement; The 14-tube sheet; The 15-heat-transfer pipe; The 16-housing; 17-shell side opening is taken over; 18-shell side pad; The 19-pass partition; 20-internal fixation bolt; The 21-inner sleeve.
Fig. 3 is a Ω ring sealing configuration, owing to the sectional shape of sealed eyelet is gained the name as omega.Ω ring sealing configuration 26 between the figure middle shell sees schematic representation for details, and the Ω ring sealing configuration 27 of bobbin carriage end sees schematic representation 5 for details.
Fig. 4 is the Ω ring sealing configuration enlarged view between Fig. 3 middle shell, and 28 is Ω rings among the figure.
Fig. 5 is the Ω ring sealing configuration enlarged view of bobbin carriage end among Fig. 3, and 28 is Ω rings among the figure, the 29th, and bobbin carriage end, the 30th, sealing cover, the 31st, double-screw bolt, the 32nd, nut.
Fig. 6 is the common big flange type sealing of heat exchanger bobbin carriage end or container manhole opening, and 29 is bobbin carriage ends among the figure, the 30th, and sealing cover, the 31st, double-screw bolt, the 32nd, nut, 33 packing rings are metal octangonal rings.
Shown in Figure 7 is the common big flange seals in heat exchanger tube sheet both sides, and the packing ring of its both sides all is metal octangonal rings, and 31 is double-screw bolts among the figure, the 32nd, and nut, 33 packing rings are metal octangonal rings, the 34th, heat exchanger tube sheet.
Fig. 8 is the another kind of traditional structural type schematic representation that is mainly used in the manhole sealing, form the moment M effect of pressing P to cause in the inner side surface BD section of sealing cover 30 is born by flange 29, sealing cover 30 and connecting bolt 31 and main parts size such as nut 32, pad 35.
Fig. 9 is one of seal bowl (no square lid) the sealing configuration form half of schematic representation of axisymmetric, form by main parts size such as flange 29, sealing cover 30 and connecting bolt 31 and nut 32, pad 35, ellipse heads 36, be mainly used in the shell end sealing, because of the structure shape of ellipse head 36 resembles a bowl, cause and obscure for avoiding bearing the same name, so be referred to as seal bowl (no square covers) easy-to-understandly with the ellipse head of shell end.
After figure Intermediate gasket 35 expanded to seal bowl (no square lid) ABC by original width AB, the moment M of pressing P to cause in the inner side surface BD of sealing cover 30 bore originally just no longer existed, and the thickness of sealing cover 30 is attenuate greatly; BD bore originally, and interior pressure P changes by the BC section of seal bowl (no square covers) bears, and finally form the B point place that a concentrated load acts on sealing cover 30 inboards, because the B point is very near from the distance of bolt 31, lacked radius R than center line from the distance of bolt 31, so the bending moment that bolt is subjected to is very little, and bolt also can design carefullyyer; The thickness of the flange 29 that equity matches (or bobbin carriage end cylinder) is obvious attenuate also.
Figure 10 is the half of schematic representation of the axisymmetric of seal bowl (no square lid) another form of sealing configuration, is that seal bowl (no square covers) is not that metallic shim semi-finished product with periphery weld mutually with unique difference of Fig. 9, but welds mutually at the B place with flat cover.
Figure 11 uses that the utility model know-why is improved Fig. 8 manhole sealing configuration or the distortion innovation form of Fig. 9 and Figure 10, cover main parts size such as 38 by flange 29, sealing cover 30 and connecting bolt 31 and nut 32, pad 35, shell 36, the little cylindrical shell 37 of sealing cover, sealing arch and forms, clog in the little cylindrical shell of normal conditions lower sealing cover and be subjected to the little foamed plastics of influence of temperature change (just having duct 39 on the little cylindrical shell 37 of special circumstances lower sealing cover) with the container perforation.The sealing arch covers 38 effects of bearing the interior P of pressure, because the length of little cylindrical shell 37 is not less than its diameter, the effect of interior pressure P can not cause moment M on sealing cover.
5, embodiment
The utility model is to replace sealing gasket by seal bowl (no square lid) to reach the purpose of simplifying the thin sealing configuration of letter, below in conjunction with embodiment and accompanying drawing, the utility model is further described, but mode of execution of the present utility model is not limited thereto.
At first, original sealing structure is carried out new force analysis, by the function of seal bowl (no square lid) structure, after calculating reduction or eliminating moment of flexure, the thickness of seal plate dome.According to GB150-1998 " Steel Pressure Vessels " standard, originally the dull and stereotyped dome thickness of sealing configuration needs by following formula and chooses COEFFICIENT K and calculate from the table 7-7 of this standard
The artificer thinks that the dull and stereotyped dome periphery of seal bowl (no square lid) structure needs to pass through Bolt Connection with flange, and its thickness can calculate by full face flange thickness formula in the GB150 standard
The second, the arch lid in the middle of the design seal bowl (no square lid) is exactly the designing and calculating of piece number 36 ellipse heads among Fig. 9, for internal pressure vessel, this bowl is equivalent to be subjected to the external pressure effect, looks the concrete structure shape, can be by the calculating of ellipse head in the GB150 standard or bowl-type end socket.For the thickness of further attenuate end socket or improve the rigidity of end socket, can add gusset at the concave surface of end socket (promptly bowl in).
The 3rd, arch lid in the middle of the seal bowl (no square lid) both can have been colded pressing also, and hot pressing is shaped, weld mutually with peripheral metallic shim semi-finished product the qualified on inspection back of arch lid of the centre that is shaped, and postwelding butt welded seam again carries out non-destructive inspections such as PT, detects again the metallic shim semi-finished product to be processed into finished product after qualified.
The 4th, press the original process step of flat cover and continue structures such as relevant front cover of processing and bolt hole.
The 5th, press original step assembling flat cover of flat cover and seal bowl (no square lid) to pressurized container.
Present embodiment is except that following technical characteristics, and other are with embodiment 1:
(1) seal bowl of Cheng Xinging (no square lid) intermediate arches lid is not to weld mutually with the metallic shim semi-finished product of periphery after qualified on inspection, but welds mutually with flat cover as shown in figure 10, and postwelding butt welded seam again carries out non-destructive inspections such as PT.
(2) seal bowl (no square lid) should design the pressure testing ozzle, by this custom-designed pressure testing ozzle intermediate arches lid and the bowl-type Seal cage that flat cover forms are carried out pressure test and air tightness test, to check the intensity and the tightness of bowl-type Seal cage, the pressure testing ozzle is sealed with plug and by seal weld in qualified back.
Present embodiment is except that following technical characteristics, and other are with embodiment 1:
Seal bowl (no square lid) intermediate arches lid is not piece number 36 ellipse heads or a bowl-type end socket among Fig. 9, forms but the little cylindrical shell 37 of sealing cover, the sealing arch that are decomposed into Figure 11 covers 38 two parts, and promptly arch covers to become and is cover.The little cylindrical shell 37 of capping, sealing arch cover 38 two parts all presses design by the outer part that bears in the GB150 standard.
The foregoing description is the utility model preferred implementation; wherein embodiment 1 is preferred embodiment; but mode of execution of the present utility model is not restricted to the described embodiments (for example the utility model is used for middle and low-pressure vessel or uses this structure in non-occasion of improving force-bearing situation or the like); other any do not deviate from change, the modification done under spirit of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.
Claims (18)
1. no moment of flexure structure is covered in a high pressure sealing, and the sealing cover sealing configuration is made up of main parts size such as container end portion flange, pad, sealing cover and connecting bolt and nuts, and its critical component is seal bowl or the sealing drum that no square covers; It is characterized in that: no moment of flexure seal bowl structure is made up of the pad of periphery and middle arch lid two-part structure, and gasket seal is not that traditional circle is circular, but bowl-type, i.e. discoid with the arch end socket.
2. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: no moment of flexure seal bowl structure is made up of with the peripheral pad that separates the intermediate arches lid, pad is still the independent shim form of tradition, and sealing drum then is the distortion of seal bowl arch end socket.
3. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: peripheral pad and the intermediate arches lid of forming no moment of flexure seal bowl are that whole raw material is made, and are processed by forging blank or a very thick steel plate turning.
4. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: form the peripheral pad of seal bowl and intermediate arches lid and be and be pressed in the middle of the thicker steel plate that arch covers, pad is processed in peripheral turning.
5. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: forms the peripheral pad of no moment of flexure seal bowl and intermediate arches lid and is the thin sheet pack of several layers middle together be pressed into multilayer encircle cover, periphery welds turning together and is processed into pad.
6. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: peripheral pad and the intermediate arches lid of forming no moment of flexure seal bowl are to be made by same block of material disjunctor, but its structural type of the pad of seal bowl periphery is smooth flat, the ripple flank of tooth, lines sealing surface.
7. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: peripheral pad and the intermediate arches lid of forming no moment of flexure seal bowl are that separately two identical or different raw materials are made, but the pad of seal bowl periphery is to weld together with the arch of centre lid after being made separately by metal again, and its structural type is smooth flat, the ripple flank of tooth, lines sealing surface.
8. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: its structural type of pad of no moment of flexure seal bowl periphery is the combination that the graphite of filling is smeared on smooth flat, the ripple flank of tooth, lines sealing surface and its surface.
9. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: intermediate arches lid and the peripheral pad of forming no moment of flexure seal bowl are that separately two identical or different raw materials are made, but the lid of the arch in the middle of the seal bowl is a metal base.
10. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: after the intermediate arches lid of forming no moment of flexure seal bowl is made separately again with the pad welding of periphery, intermediate arches is covered structural type and is comprised that spherical cap, ellipse cover, round barrel cover.
11. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: the intermediate arches lid of forming no moment of flexure seal bowl is the combination of spherical cap, oval lid, several structural types of round barrel cover.
12. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: the intermediate arches lid of forming no moment of flexure seal bowl is the individual layer arch lid that a very thick steel plate is pressed into.
13. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: the intermediate arches lid of forming no moment of flexure seal bowl is the multilayer arch lid that the thin sheet pack of several layers is pressed into together.
14., it is characterized in that: reinforcement not in the arch that no moment of flexure seal bowl intermediate arches is covered according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1.
15. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: be added with rib in the arch of no moment of flexure seal bowl intermediate arches lid, if the arch lid is the cylindric lid of height greater than diameter, then rib and sealing cover inner side surface weld together.
16. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: no moment of flexure seal bowl intermediate arches lid and circular dull and stereotyped end cap two-part are welded to form the fusion structure that one becomes seamless defective.
17. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: filling is subjected to the little foamed plastics of influence of temperature change in the confined space that forms between the arch lid of no moment of flexure seal bowl and the sealing cover.
18. according to the no moment of flexure structure of the described a kind of high pressure sealing lid of claim 1, it is characterized in that: no moment of flexure seal bowl intermediate arches lid covers two part assembly weldings by little cylindrical shell and sealing arch and forms, and encircles to cover to become to be cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201507215U CN201666367U (en) | 2009-04-26 | 2009-04-26 | High-pressure sealing cover structure without bending moment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201507215U CN201666367U (en) | 2009-04-26 | 2009-04-26 | High-pressure sealing cover structure without bending moment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201666367U true CN201666367U (en) | 2010-12-08 |
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ID=43267327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201507215U Expired - Lifetime CN201666367U (en) | 2009-04-26 | 2009-04-26 | High-pressure sealing cover structure without bending moment |
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| Country | Link |
|---|---|
| CN (1) | CN201666367U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538559A (en) * | 2012-02-29 | 2012-07-04 | 茂名重力石化机械制造有限公司 | Tube header of tube-type heat exchanger |
| CN102564170A (en) * | 2012-02-29 | 2012-07-11 | 茂名重力石化机械制造有限公司 | Tube type heat exchanger |
| CN103063075A (en) * | 2013-02-26 | 2013-04-24 | 茂名重力石化机械制造有限公司 | Tube box structure of tube type heat exchanger |
| CN103542761A (en) * | 2013-10-31 | 2014-01-29 | 茂名重力石化机械制造有限公司 | Sealing gasket for tube box of tube type heat exchanger |
| CN108763686A (en) * | 2018-05-17 | 2018-11-06 | 哈尔滨电气股份有限公司 | Reinforcement seals flat cover strength check methods |
-
2009
- 2009-04-26 CN CN2009201507215U patent/CN201666367U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538559A (en) * | 2012-02-29 | 2012-07-04 | 茂名重力石化机械制造有限公司 | Tube header of tube-type heat exchanger |
| CN102564170A (en) * | 2012-02-29 | 2012-07-11 | 茂名重力石化机械制造有限公司 | Tube type heat exchanger |
| CN103063075A (en) * | 2013-02-26 | 2013-04-24 | 茂名重力石化机械制造有限公司 | Tube box structure of tube type heat exchanger |
| CN103063075B (en) * | 2013-02-26 | 2014-09-17 | 茂名重力石化机械制造有限公司 | Tube box structure of tube type heat exchanger |
| CN103542761A (en) * | 2013-10-31 | 2014-01-29 | 茂名重力石化机械制造有限公司 | Sealing gasket for tube box of tube type heat exchanger |
| CN108763686A (en) * | 2018-05-17 | 2018-11-06 | 哈尔滨电气股份有限公司 | Reinforcement seals flat cover strength check methods |
| CN108763686B (en) * | 2018-05-17 | 2022-02-25 | 哈尔滨电气股份有限公司 | Method for checking strength of reinforced sealing flat cover |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 525024 Guangdong City, Maoming Province Ring West Road, No. 91 Patentee after: Maoming gravity Petrochemical Equipment Co Ltd Address before: 525024 Guangdong City, Maoming Province Ring West Road, No. 91 Patentee before: The Challenge Petrochemical Machinery Corporation |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101208 |