CN2095972U - Shaft seal device - Google Patents
Shaft seal device Download PDFInfo
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- CN2095972U CN2095972U CN 89207846 CN89207846U CN2095972U CN 2095972 U CN2095972 U CN 2095972U CN 89207846 CN89207846 CN 89207846 CN 89207846 U CN89207846 U CN 89207846U CN 2095972 U CN2095972 U CN 2095972U
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Abstract
The utility model relates to a sealing device used for rotating shafts, reciprocating shafts or composite moving shafts, which is composed of filling materials, a tightening structure of shafts, a static sealing structure and an elastic buffering structure of each ring. The utility model solves the problems that the sealing radial vibration resistance of the existing stuffing box shaft is extremely bad, and the filling materials are not in the optimal sealing state. The utility model has extremely strong capability of radial vibration (swing) resistance and axial towing resistance, and has the advantages of good sealing effect, long use period, little maintenance, easy manufacture and low sealing expense. The utility model is suitable for all media and the operating conditions of most sealing parts and is extensively used for centrifugal pumps, agitator tanks, valves and mechanical equipment of reciprocating pumps.
Description
The utility model provides a kind of running shaft, reciprocating shaft or compound motion shaft seal of being used for.Be widely used in having stuffing box structure in the industries such as chemical industry, chemical fertilizer, petrochemical industry, iron and steel, generating, agricultural or similar structure need carry out shaft sealing to prevent various machineries, the equipment of dielectric leakage to running shaft, reciprocating shaft or compound motion axle.For example: centrifugal pump, agitator tank, valve, reciprocating pump etc.
Need machinery, the equipment great majority that running shaft, reciprocating shaft or compound motion axle carry out shaft sealing be had stuffing box structure and adopt various filler shaft sealings now.Used filler has various soft packings, hard packing, elastic filler etc.The different shaft sealing effect of their performances is also different.Totally say through long term investigation: use above-mentioned filler all to exist axle in various degree and leak; Life cycle is short; Need the operator often to safeguard; The filler utilization ratio is low; Problems such as sealing expense height.
Number of patent application 88 1 05015 Woven elastic seal packings and manufacture method technology, require from improving the filler self performance according to sealing position applying working condition, for example: elasticity, wear resistance, corrosion resistance, anti-pressure ability reach the raising sealing, and the purpose of the long life cycle in edge has certain effect.Home and abroad many fillers factory and Research on Seal mechanism mostly continue to use this traditional concept research and improve the filler self performance, for example: improve elasticity, ductility, wear resistance, corrosion resistance etc., trying hard to improving sealing, is that main aspect obtains than quantum jump along long life cycle.The Woven elastic seal packing that above-mentioned inside and outside material differs is with abroad some are used for utilizing the characteristic of various soft packings under the more complicated operating conditions the special-purpose stuffing box packing that is used in combination; Combined type soft packing seal part etc. is exactly the illustration of this traditional concept.Therefore the different various fillers of performance emerge in an endless stream, and cost improves constantly, yet aspects such as sealing effect life cycle improve slowly.This is because traditional concept is only noted improving the filler self performance, has ignored how to make filler be in the best or near this importance of optimal seal state.Below from using soft packing that the failure analysis of rotation axis seal is illustrated this problem.Some circle soft packings pack in the stuffing box compress with gland after because filler is subjected to the axial pressure of gland just to produce plastic deformation or resiliently deformable.Therefore obtained the radial pressure (an initial specific pressure) of filler to the sealing part axial plane, this moment, filler and stuffing box and axial plane all constituted static seal.When axle rotate reach rated revolution after because the imbalance of impeller; The gap of bearing, particularly bearing use the gap in later stage; Act on the impulse force of medium on the impeller; The factors such as amount of deflection of axle make the sealing part axle produce radial vibration (swing) and axial float.To the lateral extrusion effect (its frequency is generally by the decision of axle revolution, and revolution high amplitude is more little more) that has produced certain frequency with the soft packing of touching of being coupling.Because filler is to be closed in the annulus that stuffing box, axle and gland form,, make filler can not adapt to or not have the lateral extrusion effect of this frequency of spatial adaptation synchronously owing to the solid property or the semi-solid property of various fillers determines.Particularly more obvious for the very big stirring shaft lateral extrusion effect of the amount of radially wobbling.This has just changed aforementioned effectively initial specific pressure, makes filler be radial vibration frequency change state to the axial plane specific pressure.See that with practical conditions pressured lid place filler is bigger to the axial plane specific pressure, successively decrease inside.Along with the factors such as distortion of the passing of service time, wearing and tearing, filler reduce specific pressure gradually, occur leaking along axial plane until medium with certain inside and outside pressure reduction.When keeping an effective specific pressure again after the gland once more, so repeatedly until must more renewing filler, elastic filler is than general soft packing tracing ability, anti-radial vibration ability is strong, but ability must compete is limited as particularly very big the radially wobbling of its long-time anti-radial vibration of resilience space owing to the above-mentioned reason that is closed in the stuffing box only depends on space in filler self and the filler.Therefore existing most fillers comprise the tracing ability of all can not the long period stable maintenance of combined packing to axle.And after the filler wearing and tearing, there is not collocation structure again to keep an effective specific pressure.Between every in addition circle filler; Every circle filler jointing; Be full of medium in the stuffing box in feasible actual use the in space in the braided packing, formed full infiltration leakage based on the axial plane leakage.
In sum, from this routine shaft sealing failure analysis: not changing existing stuffing box structure, is under the main situation to use existing filler, how to make the filler long period, stable maintenance to the tracing ability of axle and compensatory be to improve anti-radial vibration, axially towing; The long life cycle in considerable raising sealing and edge; Reduce the sealing expense; Improve the direction of total economic effect.And only note improving and improving filler self performance effect is limited.
The purpose of this utility model will provide a kind of shaft sealer exactly, and it is applicable to running shaft, reciprocating shaft or compound motion axle.Extremely strong anti-radial vibration (swing) and anti-axial towing ability are arranged.Has good sealing property; Long life cycle; Medium adaptability widely; Be applicable to most sealings position operating mode, and cost is very low that lower sealing expense arranged.
Task of the present utility model is finished like this: figure one is the general structure of this shaft sealer; Figure two is that this device is used for centrifugal pump structure; Figure three is structures that this device is used for agitator tank; Figure four is structures that this device is used for stop valve.
Among the figure one, (1) axle, (2) stuffing box, (3) packing ring, (4) main seal ring, (5) shrink-ring, (6) seal gease, (7) gland, (8) elastic component, (9) metal washer, (10) gland bolt.Figure axis (1) can be centrifugal pump shaft, stirring shaft, reciprocal pump shaft, valve rod etc.Packing ring (3) is to select appropriate filler for use according to medium kind and sealing position working condition requirement: soft packing, hard packing, elastic filler, the filler after softening or the mixed fillers of above-mentioned certain several filler.And according to the radial dimension between stuffing box and the axle and girth with cross section appropriate filler intercepting plurality of sections looped-shaped bending, interface is that the axial slope angle at 30 ° of-40 ° of angles is made.The main effect of packing ring (3) is the static seal that constitutes the stuffing box internal diameter, and axle is constituted more weak motive sealing.It installs other rings with this and mixes this shaft sealer that uses the dynamic and static sealing of formation appropriately to take into account.The distribution of packing ring (3) is: ordinary circumstance stuffing box the inside and outermost should be put this ring, and the centre is alternately put or do not put.
Constitute the axle contracted structure by main seal ring (4) and shrink-ring (5).Wherein main seal ring (4) constitutes the motive sealing to axle, has been that main seal action prevents the parts that axle leaks.Shrink-ring (5) can be that hoop is at main seal ring (4) external diameter; Be set in main seal ring (4) the inside; Be woven in main seal ring (4) the inside; Or main seal ring (4) and shrink-ring (5) are elastic ring, the semisolid dope of one.Shrink-ring (5) by self elasticity or inelastic action in main seal ring (4) make its with suitable tightness hoop on axle.Formation is to the contracted structure of axle.Should leave between shrink-ring (5) or main seal ring (4) external diameter and the stuffing box enough annuluses as the diameter of axle to the vibration (swing) buffer space.This annulus generally should be filled or not fill and leave this space with seal gease (6) according to medium kind and sealing position operating mode.Buffer space by main seal ring (4) and shrink-ring (5) formation to axle contracted structure and external diameter.Be can the long period stable maintenance of this device to the following and compensating action of axle, the key structure of extremely strong anti-radial vibration (swing) and axial towing ability is arranged.Main seal ring (4) should be selected following material for use according to medium kind and sealing position operating mode: 1. various stuffing box packing, for example: rubber asbestos packing, anticorrosive asbestos packing, carbon fiber packing.2. various sealing materials, for example: teflon, filled polytetrafluoroethylene, phenolic plastic.3. metallic material, for example: low carbon steel, cast iron, brass.4. semisolid dope, for example: the mixture of lubricated high temperature grease and short asbestos fiber.Mix in the ratio that reaches cone penetration 160-180 degree after mixing.Wherein: 1. various stuffing box packing are applicable to running shaft, reciprocating shaft or compound motion axle equipment, are particularly useful for higher line speed operating mode.2. various sealing materials are applicable to running shaft, reciprocating shaft or compound motion axle equipment, are applicable to middle Constant Linear Velocity operating mode, and select for use according to the medium kind.3. metallic material and 4. the semisolid dope only be applicable to running shaft, the compound motion axle equipment of low linear velocity, for example: agitator tank, valve etc.Shrink-ring (5) should be selected for use according to device category, sealing position operating mode: 1. elasticity constriction, for example: extension spring, steel rim of spring.2. non-resilient constriction, for example: special-purpose larynx hoop, steel ring.They all are applicable to running shaft, reciprocating shaft or compound motion axle equipment.But the axle contracted structure had stronger following and compensating action by what elasticity constriction and main seal ring (4) were formed.So be applicable to higher line speed operating mode and bigger radial vibration (swing) situation.The contracted structure of being made up of non-resilient constriction only is applicable to low linear velocity operating mode and less radial vibration (swing) situation.
Seal gease (6) should be selected suitable semisolid dope for use according to medium kind and sealing position operating mode, for example: 1. various lubricating grease.2. the mixture of lubricating grease and inorfil or organic fiber is filled or is not filled.When having too high surpassing on any optional seal gease (6) serviceability temperature of obvious destruction or medium temperature to seal gease (6), medium just can not use seal gease (6) to fill in limited time.Seal gease (6) also should be coated with skim sealing fat when other being installed respectively encircling except that the space of filling between contracted structure outside and the stuffing box.
Elastic component (8) is installed between gland (7) and the metal washer (9) or the stuffing box the inside.The axial pressure of the interruption that gland bolt (10) is applied by self elastic reaction is comparatively stable acts on whole shaft sealer.Radial vibration (swing) and axial motion for axle also play the elastic buffer effect.Obviously improved whole device following and compensating action to axle.For the axle that radially wobbles more greatly, also can swing with axle and alleviated the lateral extrusion effect of axle each ring and gland because of gland.So the use of elastic component (8), particularly alleviates the operator to along long this device life cycle the maintenance of this device had important function.Elastic component (8) should be selected pressure spring, extension spring, cushion for use or not use elastic component (8) according to device category.Less for radial vibration (swing) amount, gland (7) the outside equipment that axial space is very little and the inside and outside pressure reduction of sealing part medium is bigger should adopt cushion, or does not adopt elastic component (8).For example: valve, some centrifugal pump, some reciprocating pump.For the bigger equipment of the amount of radially wobbling, for example: agitator tank should adopt pressure spring or extension spring.Wherein cushion should be the rubber pad or the metallic elastic pad of shore hardness 55-65 degree.
Packing ring in this device (3), main seal ring (4) and shrink-ring (5) form to the axle contracted structure, the usage quantity of each ring and distribute and should select an optimum according to device category, sealing position operating mode.Less to the stuffing box degree of depth, institute's filler number of turns of putting is less, for example: centrifugal pump, by what main seal ring (4) and shrink-ring (5) were formed the axle contracted structure is answered two groups of installations of putting together.And when the sealing part axle has higher line speed these two groups can be installed to stuffing box the inside to utilize medium cooling, heat radiation (seeing embodiment one).To the equipment that stuffing box is dark, the sealing part axial velocity is lower.For example: agitator tank, should per two circle packing ring (3) folder one group of shrink-ring (5) and main seal ring (4) installations (seeing embodiment two).
This device is owing to the contracted structure that has adopted axle; The static seal structure of each interannular and to the elastic buffer structure of each ring, so obviously improved this device following and compensating action to axle.Have extremely strong anti-radial vibration (swing) and anti-axial towing ability.Especially anti uneven, very big radially wobble ability be existing packing box seal and common mechanical sealing can not compare.This device sealing effect is fabulous; Life cycle is long; Do not need the operator often to safeguard in the use, for example: the gland bolt; Easy to use, needn't can install and use by dismounting equipment; Make easily, cheap, the factory with general machining ability all can make by oneself, and can select for use less expensive filler, material to reach reasonable effect, so have very low sealing expense.This device is applicable to All Media and most sealings position operating mode.Be wherein three kinds of embodiments that this device is used for centrifugal pump, agitator tank, stop valve below.
Embodiment one: figure two is that this device is used for centrifugal pump structure.(1) pump shaft, (2) stuffing box, (3) packing ring, (4) main seal ring, (5) extension spring, (6) seal gease, (7) gland, (8) rubber pad, (9) metal washer, (10) gland bolt among the figure.
Pump shaft among the figure (1) is the axle sleeve concentric with axle also.Packing ring (3) is to select for use the length of side to equal or be slightly smaller than the stuffing box radial dimension, the XS250 rubber asbestos packing of standard, and be that 30 ° of-40 ° of axial slope angle looped-shaped bendings are made by stuffing box girth intercepting fracture.Main seal ring (4) is to select above-mentioned rubber asbestos packing for use equally, intercept plurality of sections as stated above and be dipped to that softening back goes out with protruding rolling or make filler after softening simultaneously hit the groove of a dark about 2mm with one section diameter 3mm of hammering iron rod with hot machine oil, while thickness is also more flat slightly.Two grooves of this filler are bent outwards be enclosed within axle circlewise and go up as main seal ring (4).Extension spring (5) for the sealing part diameter of axle in 30-55mm centrifugal pump base dimension commonly used is: spring outer diameter D=2.5mm; Spring thread diameter d=0.5mm; The spring length L equals (1.2-1.3) times sealing part axle girth.Spring one end has taper, and circle head and the tail connection on axle earlier is screwed into the other end with taper one end and forms a ring-spring during installation.This ring-spring (shrink-ring) hoop is constituted one group to the axle contracted structure in the above-mentioned main seal ring external diameter groove that has been enclosed within on the axle.Seal gease (6) is to make in the ratio that reaches cone penetration 160-170 degree after mixing with short asbestos fiber with No. 4 high temperature soda greases.Installation of each ring should be staggered each fracture by the order of figure two in the stuffing box, and fills space between main seal ring external diameter and the stuffing box and each space between encircling with seal gease (6).Each ring should fill after installing stuffing box and with the gland compacting extrude wherein air and excessive seal gease.Rubber pad (8) is that elastic component should be selected shore hardness 50-65 degree for use for sealing part diameter of axle 30-55mm centrifugal pump commonly used, thick about 10-15mm, internal diameter is a bit larger tham gland bolt (10) diameter, and external diameter is the rubber pad (two in every cover) of 0.7 times of sealing part diameter of axle.A thick about 2-2.5mm is put in rubber pad (8) outside, and the metal washer (9) that inside and outside footpath all is a bit larger tham the inside and outside footpath of rubber pad (8) is depressed into suitable tightness with gland bolt (10).Its tightness is about former gland to filler normal pressure 0.6-1 doubly.
Present embodiment is applicable to most centrifugal pumps and most of neutrality, alkalescent, subacidity, contains a large amount of solid particle mediums.Applicable working condition: temperature-30-120 ℃; Pressure＜8kg//cm
2Axial plane linear velocity＜15M/S.If replace above-mentioned rubber asbestos packing with anticorrosive asbestos packing, present embodiment will be applicable to most of neutrality and Korrosionsmedium.Present embodiment also has cost except that having aforementioned device superior characteristic extremely low, and the characteristics that the sealing expense is extremely low are very economic shaft sealers.
Embodiment two: figure three is structures that this device is used for agitator tank.(1) stirring shaft, (2) stuffing box, (3) packing ring, (4) main seal ring, (5) extension spring, (6) seal gease, (7) gland, (8) pressure spring, (9) metal washer, (10) gland bolt among the figure.
Stirring shaft among the figure (1) is the axle sleeve concentric with axle also.Packing ring (3) and main seal ring (4) all are the XS250 rubber asbestos packing of selection standard as embodiment one.Method for making respectively with embodiment one in packing ring (3) with identical through softening main seal ring (4).Extension spring (5) is that shrink-ring is spring outer diameter D=2.7mm(± 0.2 for sealing part diameter of axle 50-100mm agitator tank base dimension commonly used and structure); Spring thread diameter d=0.7mm(± 0.06); The spring length L equals (1.2-1.3) times sealing part axle girth.Spring one end has taper, during installation earlier circle link at head and the tail on the axle and taper one end be screwed into the other end and form a ring-spring such as embodiment one and this ring-spring (shrink-ring) hoop is being enclosed within rubber asbestos packing main seal ring (4) the external diameter groove on the stirring shaft, constitute one group to the axle contracted structure.Seal gease (6) is to adopt No. 4 high temperature soda greases, needn't with various fiber blends.The use of seal gease (6) and the installation of each ring and embodiment are together.Difference is that the distribution of each ring is per two circle packing ring (3) folder one group of contracted structure (main seal ring (4) and shrink-ring (5) are seen figure), and outermost should be put one group of contracted structure.This be normal conditions be used for that the dynamic and static sealing of this shaft sealer of agitator tank takes into account respectively encircle best distribution.Pressure spring (8) is that elastic component (8) is for sealing part diameter of axle 50-100mm agitator tank base dimension commonly used and structure: spring outer diameter D=25mm(± 0.5); Spring thread diameter d=2.8mm(± 0.08); Spring height H=30-45mm; The 3-6 circle; The cold coiling spring steel; Four in every cover.Put metal washer (9) that an external diameter is a bit larger tham the spring outer diameter D above pressure spring during installation (8) and compress with the gland bolt (10) that extends, decrement is 1/2-2/3 by above-mentioned stirring diameter of axle scope.
Present embodiment is applicable to agitator tank equipment most standards or off-gauge.Be applicable to most neutrality, alkalescent, subacidity, weak oxide gas or liquid medium.Applicable working condition: temperature-30-130 ℃; Pressure＜16kgf/cm
2Axial plane linear velocity＜5M/S.If replace above-mentioned rubber asbestos packing with anticorrosive asbestos packing, present embodiment will be applicable to most gases or liquid medium.Present embodiment also has the greatly anti-ability that radially wobbles except that having aforementioned device superior characteristic; Need the operator to go to safeguard in the use hardly; Cost is low; The characteristics that the sealing expense is extremely low.It is a very economic shaft sealer.
Embodiment three: figure four is structures that this device is used for stop valve.(1) valve rod, (2) stuffing box, (3) packing ring, (4) main seal ring, (5) extension spring, (6) seal gease, (7) gland among the figure.
Packing ring among the figure (3) is the XS250 rubber asbestos packing of selection standard as embodiment one, its method for making also with embodiment together.Main seal ring (4) is a polytetrafluoroethylene ring, for nominal diameter Dg=100mm by the base dimension of valve collar be: outer diameter D=30mm; Inner diameter d=24mm; High H=13mm.Interface is 30 ° of axial slope angle, and external diameter has the groove of two dark about 1mm, wide about 2mm, and two extension springs (5) are that lock ring is in groove.Extension spring (5) is that shrink-ring is for above-mentioned nominal diameter Dg=100mm stop valve base dimension and structure: spring outer diameter D=1.6mm(± 0.1), and spring thread diameter d=0.3mm(± 0.04); Spring length L=68mm; The iron wire that two ends respectively are connected with φ=0.4mm, a long L=20mm needn't be dismantled valve body when installing just can be with extension spring (5) lock ring on main seal ring (4).Seal gease (6) is to adopt 7602 elevated-temperature seal fat (SY4009-81).All should be with above-mentioned elevated-temperature seal fat filling between space and each ring between (4) external diameter of main seal ring during installation and the stuffing box (2), and with the gland compacting extrude wherein air and unnecessary seal gease.
Present embodiment is applicable to most of valves and most medium.Applicable working condition: temperature-20-225 ℃; Pressure＜16kgf/cm
2Present embodiment also has medium except that having aforementioned device superior characteristic applied widely; Life cycle is long; Cheap characteristics.
Claims (8)
1, a kind of shaft sealer, it is made up of packing ring (3), main seal ring (4), shrink-ring (5), seal gease (6), elastic component (8), it is characterized in that described device adopted main seal ring (4) and shrink-ring (5) to the axle contracted structure, the static seal structure of seal gease (6), elastic component (8) to each ring resilience buffer structure.
2, shaft sealer as claimed in claim 1 is characterized in that: shrink-ring (5) can be that hoop is at main seal ring (4) external diameter; Be set in main seal ring (4) the inside; Be woven in main seal ring (4) the inside; Main seal ring (4) and shrink-ring (5) are that elastic ring, the semisolid dope of one constitutes the contracted structure to axle.
3, as claim 1 and 2 described shaft sealers, it is characterized in that: fill with seal gease (6) in the space between contracted structure outside and the stuffing box.
4, as claim 1 and 2 described shaft sealers, it is characterized in that: seal gease (6) should be selected the semisolid dope for use.
5, as claim 1 and 2 described shaft sealers, it is characterized in that: the material that main seal ring (4) is selected for use is: stuffing box packing; Sealing material; Metallic material; The semisolid dope.
6, as claim 1 and 2 described shaft sealers, it is characterized in that: shrink-ring (5) should be selected the elasticity constriction for use; Non-resilient constriction.
7, as claim 1 and 2 described shaft sealers, it is characterized in that: the material that packing ring (3) is selected for use is: soft packing; Hard packing; Elastic filler; Filler after softening; Mixed fillers.
8, as claim 1 and 2 described shaft sealers, it is characterized in that: use elastic component (8), described elastic component applied compression spring, extension spring, cushion for gland (7) the outside big equipment of axial space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89207846 CN2095972U (en) | 1989-05-28 | 1989-05-28 | Shaft seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89207846 CN2095972U (en) | 1989-05-28 | 1989-05-28 | Shaft seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2095972U true CN2095972U (en) | 1992-02-12 |
Family
ID=4864635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89207846 Expired - Lifetime CN2095972U (en) | 1989-05-28 | 1989-05-28 | Shaft seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2095972U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064438C (en) * | 1996-01-08 | 2001-04-11 | 肥城市磷铵厂 | Novel sealing structure of roots blower |
| CN102022544A (en) * | 2011-01-06 | 2011-04-20 | 武汉理工大学 | Mechanical seal friction pair material and preparation method thereof |
| CN102705259A (en) * | 2012-05-25 | 2012-10-03 | 南京长江涂料有限公司 | Filler sealing device |
| CN103352985A (en) * | 2013-07-19 | 2013-10-16 | 合肥艾普拉斯环保科技有限公司 | Translational sealing device |
| CN104696514A (en) * | 2015-02-03 | 2015-06-10 | 杭州金舟科技股份有限公司 | Double-layer thermal insulated composite sealing device for feed opening |
| CN105134952A (en) * | 2015-07-29 | 2015-12-09 | 贵州天福化工有限责任公司 | Rotating shaft filler leakage online processing method |
| CN108815981A (en) * | 2018-08-30 | 2018-11-16 | 大连惠川环保科技有限公司 | A kind of elevated-temperature seal distributing device |
-
1989
- 1989-05-28 CN CN 89207846 patent/CN2095972U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064438C (en) * | 1996-01-08 | 2001-04-11 | 肥城市磷铵厂 | Novel sealing structure of roots blower |
| CN102022544A (en) * | 2011-01-06 | 2011-04-20 | 武汉理工大学 | Mechanical seal friction pair material and preparation method thereof |
| CN102705259A (en) * | 2012-05-25 | 2012-10-03 | 南京长江涂料有限公司 | Filler sealing device |
| CN103352985A (en) * | 2013-07-19 | 2013-10-16 | 合肥艾普拉斯环保科技有限公司 | Translational sealing device |
| CN104696514A (en) * | 2015-02-03 | 2015-06-10 | 杭州金舟科技股份有限公司 | Double-layer thermal insulated composite sealing device for feed opening |
| CN104696514B (en) * | 2015-02-03 | 2017-01-25 | 杭州金舟科技股份有限公司 | Double-layer thermal insulated composite sealing device for feed opening |
| CN105134952A (en) * | 2015-07-29 | 2015-12-09 | 贵州天福化工有限责任公司 | Rotating shaft filler leakage online processing method |
| CN108815981A (en) * | 2018-08-30 | 2018-11-16 | 大连惠川环保科技有限公司 | A kind of elevated-temperature seal distributing device |
| CN108815981B (en) * | 2018-08-30 | 2023-08-08 | 大连惠川环保科技有限公司 | High-temperature sealing distributing device |
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