CN1288369C - Sealer of liquid state alloy multiring connectopr composed by valve cover and valve seat - Google Patents
Sealer of liquid state alloy multiring connectopr composed by valve cover and valve seat Download PDFInfo
- Publication number
- CN1288369C CN1288369C CN 03112451 CN03112451A CN1288369C CN 1288369 C CN1288369 C CN 1288369C CN 03112451 CN03112451 CN 03112451 CN 03112451 A CN03112451 A CN 03112451A CN 1288369 C CN1288369 C CN 1288369C
- Authority
- CN
- China
- Prior art keywords
- valve
- sealed
- present
- liquid state
- valve seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 48
- 239000000956 alloy Substances 0.000 title claims abstract description 48
- 239000007788 liquid Substances 0.000 title claims abstract description 44
- 238000005485 electric heating Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 230000001050 lubricating effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 36
- 238000007789 sealing Methods 0.000 description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000012530 fluid Substances 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 229910001338 liquidmetal Inorganic materials 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000012856 packing Methods 0.000 description 4
- 238000005476 soldering Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Details Of Valves (AREA)
Abstract
The present invention relates to a sealed device of a liquid state alloy multi-ring communicating vessel composed of a valve cover and a valve seat, which belongs to the technical field of a sealed device with functions of energy saving and environmental protection. Because at present, a plurality of valve gates has the sealed principle that positive pressure on two sealed surfaces is enlarged, high-temperature, multi-dust and pressure loading liquid runs off from a valve gate or the rotary sealed point for a long time is a ubiquitous difficult problem. The present invention has the technical scheme that a valve cover with a ring plate is matched with a valve seat with liquid state alloy and the ring plate so as to form a sealed device with structures of a first stage liquid state alloy communicating vessel or a multi-stage liquid state alloy communicating vessel, and the periphery of the valve seat is provided with a heating device. The present invention solves the puzzle that at present, the sealed surfaces of the valve gates are not suffered from the long-term abrasion of dust particles, and the liquid is lost; the present invention has the advantages of simple and convenient manufacture, installation, use and maintenance for the sealed device. Because the viscosity of the liquid state alloy, the present invention can also reduce the frictional resistance of the rotating sealed surfaces without lubricating maintenance.
Description
Technical field: the invention belongs to energy-conserving and environment-protective seal arrangement technical field, form the seal arrangement that liquid alloy encircles connecting vessels by valve gap and valve seat more more specifically.
Background technique: for a long time, following problem is failed to satisfactorily resolve: high temperature, many dirt, pressurized fluid are ubiquitous hard nut to cracks from the long-term loss of valve or rotary seal.This is because the sealing principle of the present overwhelming majority's valve, be by strengthening the positive pressure on two sealing surfaces, make two point of contact between the sealing surface be linked to be curve of sealing when sealing surface (hard-hard) or the thick line of a sealing (the sealing anchor ring that easier formation width differs between soft-hard sealing surface), stop the fluid leakage in the valve.Do not have to stand high temperature, soft sealing material that can be wear-resisting again just can not adopt the seal form of effectively soft-hard sealing surface; And when adopting the seal form of hard-hard sealing surface; as long as once valve fail to close tight (or because of the nonconcentricity of valve gap and valve seat excessive; or because of between sealing surface, being embedded with solid sundries; or the like); pressurized fluid will carried grit secretly from flowing out at a high speed between the sealing surface of valve; the grit of high speed outflow can unevenly wash away, the sealing surface of grinding valve, gradually sealing surface is ground radially rill, groove, makes the fluid leakage amount increasing.The seal arrangement of existing other sealing principles is not suitable for the sealing of high temperature, many dirt, pressurized fluid yet.So this problem fails to solve for a long time, has not only missed the energy, has also polluted environment.
Summary of the invention:, the objective of the invention is to invent and a kind of form the seal arrangement that liquid alloy encircles connecting vessels more by valve gap and valve seat for overcoming above-mentioned shortcoming.Its technological scheme is: the valve gap of ring plate is formed the seal arrangement of one or more levels liquid alloy connecting vessels structure with being cooperatively interacted by the valve seat of liquid alloy and ring flat-plate, and is provided with heating equipment at the valve seat periphery.Advantage of the present invention is: effected a radical cure that present valve sealing face cannot stand the grit long term wear and a difficult problem of missing fluid; The manufacturing of this seal arrangement, install, use and keep in repair and all greatly simplify and make things convenient for; Because the less surface friction drag that can also reduce rotary seal face of viscosity of liquid alloy, and do not need lubricated maintenance; Explosion-proof Non-return Valve is thoroughly sensitive especially; The sealing device can be used on many cloud of dust of high temperature gas, also can be used for can not making in the sealing of many dirt liquid that liquid alloy is difficult to keep liquid; Long service life durable in use.
Description of drawings: Fig. 1 diffuses the valve arrangement schematic representation for multistage connecting vessels, Fig. 2 diffuses the valve arrangement schematic representation for the one-level connecting vessels, and Fig. 3 is the rotary seal structure schematic representation, and Fig. 4 is the Explosion-proof Non-return Valve structural representation, Fig. 5 is the selector valve structural representation, and Fig. 6 is the stop valve structure schematic representation.
Embodiment: this valve base 9 is positioned on the upper end of top gas asending pipe 4, the bottom of this valve base 9 becomes 8 * 45 ° of uniform reinforcement fins 6 to support by 8, the different concentric circle ring flat-plate 16 of three loop diameters is arranged on this valve base 9, on base plate, be welded with temperature measuring tube 29, can in time measure and on the instrument of blast furnace night shift room, demonstrate the temperature of liquid alloy 27 in this valve base 9.Outer shroud at this valve base 9, it is the steam jet ring casing 11 that is welded into by steam jet ring flat-plate 10 and outer shroud, when liquid alloy 27 has solidified and again during this valve of open and close, can shift to an earlier date the valve of opening steam jet ring casing 11 supply steam in tens minutes at tuyere platform, the steam of sending here from steam tube 5 is just from the ring flat-plate surface that is sprayed onto its opposite of the hole high speed of steam jet ring flat-plate 10, carry out the higher jet flow of efficient and give heat for heat and vapor condensation, the temperature of the solid alloy in this valve base 9 is elevated to more than the fusing point of liquid alloy 27 faster; Three concentric circle ring flat-plates 26 that diameter is different are arranged at the bottom of ring flat-plate in this valve valve gap 13, when this valve gap is tight, form three grades of connecting vessels shapes that link to each other shown in the accompanying drawing 1 with this valve base 9.The Shang Jiaochu of ring flat-plate is welded with steam jet endless tube 12 in this valve gap 13, when tuyere platform is opened to steam jet ring casing 11 supply steam, just simultaneously to steam jet endless tube 12 supply steam, high pressure steam and solid alloy carry out the bigger condensation of heat transfer coefficient and give heat, the temperature of solid alloy is raise faster and be molten into liquid alloy 27.Because the outside between this valve valve gap 13 and this valve base 9, the stock gas that may the have the short time once in a while phenomenon of catching fire, so water spray endless tube 25 is installed in the outside of the piston rod 7 of position in the drawings, become the angle more than 60 ° with horizontal plane, the surface sprinkling of the piston rod 7 above it, prevent that furnace roof from burning bending deformation to piston rod 7 once catching fire, and makes Hydraulic Power Transmission System can't continue proper functioning.Thick-wall seamless 15 between valve gap intermediate plate 14 and the valve gap top board 17 and the outer reinforcement fin of pipe, it all is the Driving force that is mutually 2 pairs of hydraulic cylinder piston rods 7 of oil hydraulic cylinder of 180 ° of layouts for two, ears connecting pin 18 through piston rod 7 upper ends, two channel-section steel crossbeams 20, beam-ends key seat 21, key seat 22 between beam, valve gap key seat 23 and taper key 24, accurately, pass to this valve valve gap 13 reliably, so also be convenient to when blast furnace staying, taper key 24 is got between beam behind the key seat 22 and valve gap key seat 23, channel-section steel crossbeam 20 is raise, this valve valve gap 13 can be hung down integral replacing, so that the wearing and tearing breach accurately on the soldering valve gap 13 3 circle ring flat-plates.For the center line lifting by design that this valve valve gap 13 can be similar to, one is that two oil hydraulic cylinders 2 adopt servocontrol formula synchronizing circuit, guarantees two oil hydraulic cylinders, 2 energy synchronization liftings, prevents channel-section steel crossbeam 20 and tilts or stuck phenomenons.The 2nd, be welded with in the outside of stock gas asending pipe 4 and become 90 ° horizontal channel-section steel 8 (can form a center line positioning hole by two static pulley) between 4 adjacent two in its outer end, near the center line positioning hole, fix 4 horizontal channel-section steels 8 by 4 angle steel welding, two center line positioning pipes that link to each other with oil hydraulic cylinder 2 not, will two pairs of static pulley below this valve mountion plate 1 reach this valve mountion plate 1 below, the centerline deviation≤4mm when guaranteeing 13 liftings of this valve valve gap.The bar section outside that directly contacts at hydraulic cylinder piston rod 7 and oil hydraulic cylinder 2 is with the dirt-proof boot 3 that can stretch.This valve is not when only blast furnace is not out-of-blast opening this valve valve gap 13 (for example blast furnace leak informaton will open this valve valve gap 1 to 5 minute when sitting material); can make the upper end of each layer ring flat-plate in this valve base 9 and the lower end of this valve valve gap 13 each layer ring flat-plate that temporary transient wearing and tearing take place; (this moment, the gas flow of blast furnace furnace roof reduced more than 60% than normal flow rate; impacting the gas speed that respectively encloses ring flat-plate reduces greatly; and square being directly proportional of the flow velocity of the impact kinetic energy of grit and grit); for what prevent that this regular meeting takes place this valve base 9 is respectively enclosed the wearing and tearing on ring flat-plate top and the wearing and tearing of this valve valve gap 13 respectively being enclosed the ring flat-plate bottom; in the top of each circle valve seat ring flat-plate and the bottom of valve gap ring flat-plate; be with and handle the abrasionproof sheath 28 make by the sheet metal punching press and through surface hardening; the local worn out abrasionproof sheath 28 of integral replacing rapidly when blast furnace plan damping down; when wearing and tearing too much in the ring flat-plate bottom of respectively enclosing of this valve valve gap 13; need soldering everywhere during breach; this valve valve gap 13 integral body can be hung down; after changing good this valve valve gap 13 of soldering; not during damping down, under cooperating, finishes special-purpose loose tool soldering at blast furnace accurately then to this valve valve gap 13.
In accompanying drawing 3, be welded with valve seat 49 in the fixed tube upper end, connecting vessels with the valve gap 54 composition liquid alloys 50 that are welded in swivelling pipe 55 lower ends, owing to have pressure difference Δ P between fluid in the pipeline and atmosphere, in connecting vessels, formed the liquid alloy height difference with Δ P balance, thereby the interface of counterrotating two segment pipes has been formed the dynamic seal (packing) that can not leak gas.Electric heating appliance 53 is in order to make liquid alloy 50 often keep liquid (if the normal temperature of pipeline inner fluid is higher than the fusing point of alloy, then not needing often to heat with Electric heating appliance 53) when proper functioning, and temperature measuring tube 52 is in order to monitor alloy temperature.
In accompanying drawing 4, pressure is P
1,＜450 ℃ inflammable gas (can be dusty gas) enters this valve from suction tude 70, is h through valve gap 65 with the degree of depth
3Liquid heavy metal 68 between, highly be h
1The annular space flow to steam outlet pipe 63, the inflammable gas pressure in steam outlet pipe 63 ingress is P
2When proper functioning, the weight G of valve gap 65
1With the buoyancy F of inflammable gas to valve gap 65
1[=S (P
1-P
2), S is the horizontal sectional area of this valve gap 65], the weight G of balancer weight fast 58
2Following relation: G is arranged
1≤ F
1+ G
2Regulate rope capacity by double thread screw pipe 56, counterweight block 58 is dropped on the platform 59, and make the down suction on valve gap 65 bottoms and liquid metal 68 surfaces equal h
1As valve gap 65 decline slightly, counterweight block 58 and F
1Make valve gap 65 rise to counterweight block 58 immediately with joint efforts to drop on again on the platform 59.When with the distant place combustible gas explosion time, the pressure P at steam outlet pipe 63 mouth of pipe places taking place at steam outlet pipe 63
2' increase severely to P in moment
1Several times more than because P
2' 〉=P
1, can form downward pressure F to valve gap 65
2[=S (P
2'-P
1)], make (G
1+ F
2The G of)＞＞
2, valve gap 65 is descended immediately immerses in the liquid metal 68, simultaneously because P
2'-P
1＞＞0 pressure difference, in the connecting vessels of between valve gap 65 and valve seat 72 ring flat-plates, forming, the liquid-column height that produces liquid metal 68 is poor, stop the explosion gas backflow of High Temperature High Pressure to enter suction tude 70, temperature resistant encapsulation packing ring 67 in the valve gap 65 (all can be≤450 ℃ of work as silicone rubber, expanded graphite packing ring) also compresses with the mouth of pipe of suction tude 70, the ring flat-plate upper end of valve seat 72 in addition, prevents that liquid metal 68 is pressed in the suction tude 70.Steam inlet pipe 61 and steam stuffing box 62 be in the box wire rope hole outside formation greater than P
1The zone of high pressure, do not allow inflammable gas from the wire rope hole atmosphere that bleeds, adopting steam tight that wire rope is moved up and down does not have surface friction drag, more is applicable to the usage requirement (will prevent from time, rapidly, delicately the to explode high temperature, the pressurized gas that produce are back in the suction tude 70 and go) of Explosion-proof Non-return Valve than packing seal.Valve seat 72 external annulus are provided with the steam heating volute, by steam inlet pipe 66 admission, go out vapour, water outlet by steam outlet pipe 69, can begin automatically valve seat 72 is carried out steam heating according to the alloy temperature of temperature measuring equipment 71 demonstrations, make liquid metal 68 remain on liquid state all the time.(if alloy melting point is higher than 100 ℃, should use Electric heating appliance instead,, outside volute, fill the thermoinsulation material of insulation simultaneously) as on the water flowing volute, heating by high frequency or electric current of intermediate frequency.
This valve is specially adapted to many dirt inflammable gas, also can be used for the Explosion-proof Non-return Valve of many dirt inflammable gas of 450 ℃-900 ℃, and this moment, valve gap 65 and valve seat 72 can use that heat-resisting steel sheet and plate is welded into or the ceramet global formation instead.Wire rope also will be used heat-resistant steel wire rope or refractory steel chain instead.
Selector valve is seen accompanying drawing 5.In accompanying drawing 5, many dirt of≤450 ℃ or few dirt gas enter this valve from suction port 78, because the fluid column difference that liquid alloy 82 forms has been offset the gas pressure difference inside and outside left valve gap 80, left air outlet 86 is in closed state.When making gas by 89 flowing out and change into when flow out left air outlet 86 from right air outlet, roll the wire rope of process leading block 74 by electric reel 75, left valve gap 80 is mentioned, and right valve gap 90 is put down fall into right valve seat 88 simultaneously, between the ring flat-plate of right valve gap 90 and right valve seat 88, the fluid column that forms liquid metal 82 immediately is poor, and is the same with the sealing mechanism of left air outlet, makes right valve gap 90 inside and outside gases lose mobile power and be sealing state.[∑ (Δ h)
1-n* γ
m=(P
1-Pa) * 10 meter water columns * γ
mThe time, in the formula: ∑ (Δ h)
1-nAlloy fluid column difference sum in the-n utmost point connecting vessels, m; γ
m, γ
wThe severe of-alloy, water, kgf/m
3P
1, Pa-valve inner fluid, the pressure of atmosphere, kgf/m
2] pressurization flue gas or superheated vapor inlet tube 76 and pressure-tight box 77, be to miss gas in this valve (or suck in the atmosphere gas) from wire rope hole to atmosphere in order to prevent.In order to make liquid alloy 82 keep liquid state not solidify, can send into superheated vapor from volute inlet tube 83 and discharge (steam+water), and outside volute, be full of liquid alloy 82 from outer pipe 84; If the insulation and thermal insulation material is then filled (as hollow Al in fusing point＞100 of liquid alloy 82 ℃ outside volute
2O
3Bead or the like), volute transmission intermediate frequency or the high frequency current with water flowing heats liquid alloy 82.Because after being subjected to tension for a long time, wire rope can produce the elongation increment, with the double-screw bolt at double thread screw pipe 73 and two ends thereof, can transfer short length of stretching out the double-screw bolt at double thread screw pipe 73 two ends timely, keep sensitive, timely for a long time with the switch operation that guarantees this valve.
In accompanying drawing 6, during this valve opening, gas (or high temperature, dusty gas) enters this valve from inlet tube 109, flows out these valves from outer pipe 110, and valve gap 103 is in position shown in the dotted line among the figure.Alloy in this valve has been heated as liquid alloy 105 at this moment.When will be by high-temperature gas when flowing through this valve, transmission device makes drive link 91 descending, and displacement distance is by the lower-limit point control of position limit switch 96, and is locked on the lower-limit point position with transmission device is chain.Valve gap 103 is when its lower position, the ring flat-plate of valve gap 103 immerses in the liquid alloy 105, and form multistage (or one-level) liquid alloy connecting vessels, the liquid-column height difference sum ∑ (Δ h) of the liquid alloys at different levels 105 that in this multistage connecting vessels, produce with the ring flat-plate of valve seat 108
M1-n* γ
m=(P
1-Pa) * γ
wDuring * 10 meter water columns, (γ
m, γ
wWater-column P when the severe of-alloy, water, 10 meter water columns-1 technical atmosphere of generation
1, the gas in this valve of Pa-, the pressure of atmosphere), the inside and outside gas of this valve will form sealing because of losing mobile Driving force, after a while because the heat radiation of valve seat 53 is solidified liquid alloy 105, valve gap 103 is dead with valve seat 108 welderings, thoroughly ended flowing of high-temperature gas.In the time of will opening this valve again, inlet tube 104 by volute feeds superheated vapor earlier, inlet tube 106 discharge waters and the steam of volute, solid alloy in the valve seat 108 is fused into liquid alloy 105, by transmission device drive link 91 is risen again, by the up terminal point of position limit switch 96 controls and locking valve gap 103.Between drive link 91 and valve gap 103, be connected by double link 92, pivot pin 95, water cold sleeve 100 and bearing pin 102, there are intake pipe 93 and outlet pipe 94 in water cold sleeve 100 upper ends, and water cold sleeve 100 can at high temperature be worked indeformable for a long time.Be lined with the sheet-steel cover 112 of refractory heat-insulating pad 111 (as fire-retardent fiber felt-rug etc.), can after laying down the bolt that covers the limit, nut, open integral replacing valve gap 103 above this valve.In order to prevent gas in this valve atmosphere that bleeds, there is suction tude 99 in pressure-tight box 97, to supply steam, keep in the box vapor pressure greater than the gas pressure in this valve, stop in this valve gas from pressure-tight box 97 atmosphere that bleeds.Two positioning and guiding pulleys 98 are in order to reduce the nonconcentricity that valve gap 103 center line when descending departs from the vertical center line of valve seat 108.
＜450 ℃ the gas if only circulate in this valve can be without water cold sleeve 100 and double link 92, bearing pin 95 etc., and directly being linked to each other with valve gap 103 by drive link 91 gets final product.
Claims (1)
1, forms the seal arrangement that liquid alloy encircles connecting vessels more by valve gap and valve seat, it is characterized in that: the valve gap of ring plate is formed the seal arrangement of one or more levels liquid alloy connecting vessels structure with being cooperatively interacted by the valve seat of liquid alloy and ring flat-plate, and is provided with steam heater or Electric heating appliance at the valve seat periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03112451 CN1288369C (en) | 2003-06-27 | 2003-06-27 | Sealer of liquid state alloy multiring connectopr composed by valve cover and valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03112451 CN1288369C (en) | 2003-06-27 | 2003-06-27 | Sealer of liquid state alloy multiring connectopr composed by valve cover and valve seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1472452A CN1472452A (en) | 2004-02-04 |
| CN1288369C true CN1288369C (en) | 2006-12-06 |
Family
ID=34152434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03112451 Expired - Fee Related CN1288369C (en) | 2003-06-27 | 2003-06-27 | Sealer of liquid state alloy multiring connectopr composed by valve cover and valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1288369C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629380A (en) * | 2013-12-04 | 2014-03-12 | 西峡龙成特种材料有限公司 | Gas pipeline sealing valve for high-temperature environment |
-
2003
- 2003-06-27 CN CN 03112451 patent/CN1288369C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1472452A (en) | 2004-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI93895C (en) | Flap valve for consumable fluid flows | |
| CN102162532A (en) | Low-temperature high pressure balancing plug valve | |
| CN1288369C (en) | Sealer of liquid state alloy multiring connectopr composed by valve cover and valve seat | |
| CN2916113Y (en) | Polish rod sealing device for oil pumping well head | |
| CN206902173U (en) | A kind of prosthetic appliance of the online leak stopping of water tube for cooling wall of blast furnace | |
| CN105757268B (en) | Ash valve | |
| CN2622493Y (en) | High-temp. dust gas releasing valve for liquid alloy multi-ving connecting vessel | |
| CN202612926U (en) | Anti-falling wellhead thermal expansion compensator | |
| CN201884324U (en) | Pressure-bearing horizontally split pump combined type sealing device | |
| CN205639851U (en) | Sodium valves | |
| CN206572002U (en) | A kind of high temperature expansion valve | |
| CN212251235U (en) | Parallel double-gate valve | |
| CN115758624A (en) | Methods of Improving the Service Life of Blast Furnace Waist and Bosh Stave | |
| CN207455023U (en) | A kind of double flange bendings | |
| CN108087658A (en) | A kind of oil-gas pipeline fast plugging device | |
| CN100451425C (en) | Expansion joint for pipeline | |
| CN203083815U (en) | Pneumatic target plate device | |
| CN206068550U (en) | One kind coalings, fills ore deposit interlocking hopper | |
| CN219866592U (en) | Sealing and air leakage preventing structure for valve rod of hot air valve | |
| CN222824818U (en) | A water-cooled furnace cover adjusting device and boiler equipment | |
| CN207470882U (en) | Soft seal abrasion-proof slag-discharging valve | |
| CN206816220U (en) | A kind of polished rod of pumping well self-lubricating protection device | |
| CN216143535U (en) | Lubricating device for piston of cold air blow-off valve | |
| CN205534790U (en) | Spherical compensator seal structure | |
| CN109161625B (en) | A blast furnace airtight box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061206 Termination date: 20140627 |
|
| EXPY | Termination of patent right or utility model |