CN104056589B - A kind of shaft sealing device and reacting furnace - Google Patents
A kind of shaft sealing device and reacting furnace Download PDFInfo
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- CN104056589B CN104056589B CN201410315584.1A CN201410315584A CN104056589B CN 104056589 B CN104056589 B CN 104056589B CN 201410315584 A CN201410315584 A CN 201410315584A CN 104056589 B CN104056589 B CN 104056589B
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- flange
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- reacting furnace
- sealing plate
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Abstract
The invention discloses a kind of shaft sealing device, including the first and second flanges and compensation device, wherein, the first flange is sealedly and fixedly connected with shaft；Second flange is fixedly connected on the first flange by sealing lowering or hoisting gear, and the edge of the second flange extends to reacting furnace direction and forms boss；Compensation device includes elastic telescopic pipe and is arranged on first and second annular seal plates at elastic telescopic pipe two ends；First annular sealing plate embeds in the groove that the end face of the second flange side and boss surround and is rotatably connected with the second flange, it is provided with one in seal wear-resistant layer, seal wear-resistant layer and the second flange and first annular sealing plate between second flange and first annular sealing plate to removably connect；Second annular seal plate is sealedly and fixedly connected with the bell of reacting furnace, simple in construction, it is simple to makes, is not easy to come off, improves sealing effectiveness, improve the reliability of sealing in whipping process.The invention also discloses a kind of reacting furnace.
Description
Technical field
The present invention relates to technical field of chemical, particularly to a kind of shaft sealing device and reaction
Stove.
Background technology
The reaction with agitating device is often used in multiple fields such as oil refining, chemical industry, metallurgy, medicine
Stove 9 equipment, and the gas great majority reacting generation have feature inflammable and explosive, that zest is strong, this will
Ask shaft and reacting furnace body to seal reliable, prevent gas from leaking.Current mechanical seal or filler are close
Envelope is owing to there being unvanquishable shortcoming cannot meet the requirement of use, and such as mechanical seal is to shaft
And the concentricity requirement of encapsulant processing and installation is high, otherwise the slight oscillatory of shaft will be quickly
Abradable seal accessory, causes seal failure；Packing seal due in rotary course wear and tear filler and make close
Envelope property is deteriorated, it has to often changes filler, is unfavorable for the carrying out of consecutive production.
In prior art, some researcheres are had for disadvantages mentioned above, sealing device to be improved, such as
Patent CN202942850U discloses a kind of shaft sealing device, and its specific embodiments is: shaft
On be welded with annular seal plate, the end cap of retort is provided with the through hole more than the shaft diameter of axle, simultaneously
Being fixed with annular water tank on end cap, the edge of annular seal plate extends downward in annular water tank, so that
Air seal is in annular water tank, and this device uses water-stop, although be prevented from gas in air
Leakage, but the water having dissolved gas needs could discharge through special handling, brings to commercial production
Trouble, adds workload and production cost, and is difficult to ensure that the gas of spilling is all dissolved in water
In, reliability is poor, in addition, due to moisture evaporation and the dissolving of gas, needs often to supplement
Or the water in replacing tank, otherwise will affect sealing effectiveness.
Patent CN201526672U discloses a kind of new type high temperature sealing device, and it is mainly rotation base
Seat, unicast corrugated tube and rotation ring seat are integrally welded, and rotating basis is fixed in retort, rotating ring
Tungsten carbide button's sheet in seat slot, use interference fit, when shaft processing or install with retort not
Time with one heart, rotating ring seat can make rotating ring be close to rotating shaft all the time with corrugated tube automatic capturing, thus
Reach the purpose sealed.But this matching requirements rotates ring seat and hard alloy has the most close thermal expansion
Coefficient, the most at high temperature easily causes alloy sheet and comes off, and the situation of seal failure, reliability is relatively low.
Therefore, how a kind of shaft sealing device is provided, makes its simple in construction, it is simple to making same
Time, improve sealing effectiveness, improve its reliability, become the important skill that those skilled in the art are urgently to be resolved hurrily
Art problem.
Summary of the invention
In view of this, the invention provides a kind of shaft sealing device and reacting furnace, to reach to make
Its simple in construction, it is simple to while making, improves sealing effectiveness, improves the purpose of its reliability.
For achieving the above object, the present invention provides following technical scheme:
A kind of shaft sealing device, between bell upper surface and the shaft being arranged on reacting furnace,
It is characterized in that, including:
First flange, is sealedly and fixedly connected with described shaft；
Second flange, is set on described shaft and is fixedly connected on described the by sealing lowering or hoisting gear
One flange is near the side of described reacting furnace, and the edge of described second flange extends to described reacting furnace direction
Form boss；
Compensation device, is set on described shaft, including elastic telescopic pipe and be separately positioned on described
The first annular sealing plate at elastic telescopic pipe two ends and the second annular seal plate；Described first annular sealing plate
Embed in the groove that described second flange end face near described reacting furnace side and described boss surround and with
Described second flange is rotatably connected, and described second flange is provided with between described first annular sealing plate
Seal wear-resistant layer, in described seal wear-resistant layer and described second flange and described first annular sealing plate
Individual removably connect；Described second annular seal plate is sealedly and fixedly connected with the bell of described reacting furnace.
Preferably, described sealing lowering or hoisting gear is sleeve expansion joint.
Preferably, described sleeve expansion joint includes the first inner sleeve, outer sleeve and the second inner sleeve, institute
State and be provided with sealant between the first inner sleeve and described second inner sleeve and described outer sleeve, described
First inner sleeve and described second inner sleeve are respectively slidably arranged on the two ends of described outer sleeve, institute
State the first inner sleeve and described first Flange joint, described second inner sleeve and described second Flange joint；
Or, described second inner sleeve and described second Flange joint, described first inner sleeve and described first method
Blue connection.
Preferably, described seal wear-resistant layer is connected by threaded fastener with described second flange.
Preferably, between described seal wear-resistant layer and described first annular sealing plate and described groove
Gap matches, including annulate lamella and the annular protrusion that is arranged on described annulate lamella edge, described annulate lamella
It is positioned at described first annular sealing plate upper surface and described second flange end face near described reacting furnace side
Between, described annular protrusion at described first annular sealing plate between side and described boss.
Preferably, described boss is provided with boss tapped through hole, on the position that described annular protrusion is corresponding
Being provided with annular protrusion screwed hole, described threaded fastener is through described boss tapped through hole and described annular
Raised thread hole coordinates to get up described annular protrusion with described second Flange joint.
Preferably, described annular protrusion screwed hole is through hole, and described threaded fastener one end is provided with smooth
Sphere, the other end is provided with the mating groove coordinated for screwdriver, arranges on described first annular sealing plate
Having and the annular groove of described smooth sphere matched in clearance, described threaded fastener is provided with smooth sphere
One end coordinates through described boss tapped through hole and described annular protrusion screwed hole with described annular groove.
Preferably, described annulate lamella and described shaft interference fit.
Preferably, between described first flange and described shaft and described second annular seal plate and institute
State to be between the bell of reacting furnace and be welded to connect.
A kind of reacting furnace, including body of heater, is provided with the bell of through hole, is located in described through hole rotationally
In shaft and the shaft sealing device that is arranged between described bell and described shaft, described
Shaft sealing device is as above shaft sealing device described in any one.
From technique scheme it can be seen that the present invention provide shaft sealing device, including the first method
Orchid, the second flange and compensation device, wherein, the first flange is sealedly and fixedly connected with shaft；Second
Flange sleeve is located on shaft and is fixedly connected on the first flange near reacting furnace by sealing lowering or hoisting gear
Side, the edge of the second flange extends to reacting furnace direction and forms boss；Compensation device is set in shaft
On, the first annular sealing plate including elastic telescopic pipe and being separately positioned on elastic telescopic pipe two ends and
Second ring sealing plate；First annular sealing plate embeds second flange end face near reacting furnace side and boss
Being rotatably connected in the groove surrounded and with the second flange, the second flange sets between first annular sealing plate
It is equipped with in seal wear-resistant layer, seal wear-resistant layer and the second flange and first annular sealing plate removable
Unload connection；Second annular seal plate is sealedly and fixedly connected with the bell of reacting furnace；
This shaft sealing device structure is simple, it is simple to make, in use, when shaft revolves
When turning, the first flange being secured to connect rotates with it simultaneously and drives the second flange to rotate, now,
Second flange rotates relative to first annular sealing plate, owing to being provided with boss on the second flange and with first
It is provided with seal wear-resistant layer between annular seal plate, is lifted by sealing between the first flange and the second flange
Device is tightly connected, therefore, during the second flange and first annular sealing plate relatively rotate, the
One annular seal plate upper surface and side and the lower surface of the second flange and the inner side of the second flange boss
Face and seal wear-resistant layer have cooperatively formed two sealing surfaces, and sealing effectiveness is preferable, it is not easy to occur gas to let out
Leakage, and it is arranged on the compensation device between the second flange and bell, it is possible to compensate due to processing, install by mistake
The shaft differing from or stirring and cause and the axiality generation deviation of reacting furnace, so that first annular sealing
Close contact is remained between plate and seal wear-resistant layer and between seal wear-resistant layer and the second flange, and
And seal wear-resistant layer removably connects with in first annular sealing plate and the second flange, in stirring
During be not easy to come off, improve sealing effectiveness, improve the reliability of sealing.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the shaft sealing device that Fig. 1 provides for the embodiment of the present invention.
Detailed description of the invention
The invention provides a kind of shaft sealing device and reacting furnace, to reach make its simple in construction,
While being easy to make, improve sealing effectiveness, improve the purpose of its reliability.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Refer to the structural representation of the shaft sealing device that Fig. 1, Fig. 1 provide for the embodiment of the present invention.
A kind of shaft sealing device that the present invention provides, for being arranged on the bell upper surface of reacting furnace 9
And between shaft 1, including first flange the 2, second flange 5 and compensation device.
Wherein, the first flange 2 is sealedly and fixedly connected with shaft 1；Second flange 5 is set in shaft 1
Upper and be fixedly connected on the first flange 2 near the side of reacting furnace 9 by sealing lowering or hoisting gear 4, second
The edge of flange 5 extends to reacting furnace 9 direction and forms boss；Compensation device is set on shaft 1,
Including elastic telescopic pipe 7 and first annular sealing plate 6 He that is separately positioned on elastic telescopic pipe 7 two ends
Second annular seal plate 8；First annular sealing plate 6 embeds second flange 5 end near reacting furnace 9 side
Being rotatably connected in the groove that face and boss surround and with the second flange 5, the second flange 5 is with first annular
Seal wear-resistant layer 11, seal wear-resistant layer 11 and the second flange 5 and the first ring it is provided with between sealing plate 6
One in shape sealing plate 6 removably connects；Second annular seal plate 8 seals with the bell of reacting furnace 9
Fixing connection.
Compared with prior art, the shaft sealing device that the present invention provides, simple in construction, it is simple to make,
In use, when shaft 1 rotates, the first flange 2 being secured to connect turns with it simultaneously
Moving and drive the second flange 5 to rotate, now, the second flange 5 rotates relative to first annular sealing plate 6,
Due to be provided with on the second flange 5 boss and and first annular sealing plate 6 between be provided with seal wear-resistant layer
11, it is tightly connected by sealing lowering or hoisting gear 4 between the first flange 2 and the second flange 5, therefore,
During second flange 5 relatively rotates with first annular sealing plate 6, first annular sealing plate upper surface
And the medial surface of side and the lower surface of the second flange and the second flange boss coordinates with seal wear-resistant layer
Defining two sealing surfaces, sealing effectiveness is preferable, it is not easy to gas leakage occurs, and is arranged on the second method
Compensation device between blue 5 and bell, it is possible to compensate and cause due to processing, alignment error or stirring
The axiality generation deviation of shaft 1 and reacting furnace 9 so that first annular sealing plate 6 is resistance to sealing
Close contact is remained between mill layer 11 and between seal wear-resistant layer 11 and the second flange 5, and
Seal wear-resistant layer 11 removably connects with in first annular sealing plate 6 and the second flange 5,
Whipping process is not easy come off, improves sealing effectiveness, improve the reliability of sealing.
Sealing lowering or hoisting gear 4 can use various structures to realize close with the second flange 5 for the first flange 2
Envelope connects, and in embodiments of the present invention, sealing lowering or hoisting gear 4 is sleeve expansion joint, and sleeve expansion joint is
A kind of common attachment means, is mainly used in compensating axial displacement.
Preferably, in embodiments of the present invention, sleeve expansion joint include the first inner sleeve, outer sleeve and
It is provided with sealant between second inner sleeve, the first inner sleeve and the second inner sleeve and outer sleeve, the
One inner sleeve and the second inner sleeve are respectively slidably arranged on the two ends of outer sleeve, the first inner sleeve with
First flange 2 connects, and the second inner sleeve and the second flange 5 connect；Or, the second inner sleeve and second
Flange 5 connects, and the first inner sleeve and the first flange 2 connect.This Complicator for bidirectional sleeve has bigger
Nose balance amount, it is possible to meet the requirement to sealing when shaft 1 lifts.
Seal wear-resistant layer 11 can in several ways with in the second flange 5 and first annular sealing plate 6
One removably connect, in embodiments of the present invention, seal wear-resistant layer 11 and the second flange 5 pass through spiral shell
Stricture of vagina securing member 10 connects.
Seal wear-resistant layer 11 can use various structures, in embodiments of the present invention, seal wear-resistant layer 11
Match with the gap between first annular sealing plate 6 and groove, including annulate lamella and be arranged on ring
The annular protrusion at shape layer edge, annulate lamella is positioned at first annular sealing plate 6 upper surface and leans on the second flange 5
Between the end face of proximal response stove 9 side, annular protrusion is positioned at side and the boss of first annular sealing plate 6
Between, the seal wear-resistant layer 11 of this structure can be by between first annular sealing plate 6 and the second flange 5
Space be fully filled with, it is ensured that sealing effectiveness.
Seal wear-resistant layer 11 can have multiple material to make, in embodiments of the present invention, and seal wear-resistant layer 11
It is made up of graphite.
When seal wear-resistant layer 11 uses above-mentioned structure, can be by the boss on the second flange 5 with close
Envelope wearing layer 11 annular protrusion realizes removably connecting, and wherein, boss is provided with boss tapped through hole,
Being provided with annular protrusion screwed hole on the position that annular protrusion is corresponding, threaded fastener 10 is through boss screw thread
Through hole coordinates with annular protrusion screwed hole and annular protrusion and the second flange 5 is coupled together.
In order to further improve sealing effectiveness, compensation device is enable to compensate timely, at this
In bright embodiment, annular protrusion screwed hole is through hole, and threaded fastener 10 one end is provided with smooth sphere,
The other end is provided with the mating groove coordinated for screwdriver, and first annular sealing plate 6 is provided with smooth
The annular groove that Spherical Clearance coordinates, threaded fastener 10 is provided with one end of smooth sphere through boss spiral shell
Stricture of vagina through hole and annular protrusion screwed hole and annular groove matched in clearance, so, when shaft 1 deviates instead
When answering the axis of stove 9, coordinate with annular groove owing to threaded fastener 10 is provided with one end of smooth sphere,
First annular sealing plate 6 can be applied active force, be allowed to keep laminating with seal wear-resistant layer 11 at any time,
Sealing effectiveness is more preferable.
In order to ensure the stability that seal wear-resistant layer 11 is connected with the second flange 5, in embodiments of the present invention,
Boss tapped through hole is provided with at least two, is evenly distributed on the second flange 5, corresponding,
The annular protrusion screwed hole of equal number, and boss spiral shell it is also equipped with on the position of seal wear-resistant layer 11 correspondence
Axis and the axis of annular protrusion screwed hole of stricture of vagina through hole intersect vertically with the axis of shaft.
Further, in order to the sealing effectiveness making seal wear-resistant layer 11 is more preferable, in embodiments of the present invention,
Annulate lamella and shaft 1 interference fit, by this structure, the annulate lamella in seal wear-resistant layer 11 can
The gas risen in reacting furnace 9 is intercepted, for the first time when the side grinding that annulate lamella contacts with shaft 1
During damage, gas enters in the cavity that the first flange 2, sealing lowering or hoisting gear 4 and shaft 1 surround, right
Gas carries out second time and intercepts, and further ensure that sealing effectiveness.
Between first flange 2 and shaft 1 and the second annular seal plate 8 and reacting furnace 9 bell it
Between can be accomplished in several ways and be sealedly and fixedly connected, in embodiments of the present invention, for the ease of making
Install, between the first flange 2 and shaft 1 and the bell of the second annular seal plate 8 and reacting furnace 9
Between be and be welded to connect.
Shaft sealing device can use multiple material to make, in embodiments of the present invention, and first
Flange the 2, second flange 5, sealing lowering or hoisting gear 4, first annular sealing plate 6 and the second ring packing
Plate 8 all uses 310S rustless steel to make, naturally it is also possible to use other high-temperature alloys to make.
In embodiments of the present invention, elastic telescopic pipe is corrugated tube.
Present invention also offers a kind of reacting furnace, including body of heater, be provided with the bell, rotationally of through hole
Wear shaft 1 in through-holes and the shaft sealing device being arranged between bell and shaft 1,
Wherein, shaft sealing device is the shaft sealing device of as above any one.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
See, generic principles defined herein can without departing from the spirit or scope of the present invention,
Realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein,
And it is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (8)
1. a shaft sealing device, is used for being arranged on bell upper surface and the stirring of reacting furnace (9)
Between axle (1), it is characterised in that including:
First flange (2), is sealedly and fixedly connected with described shaft (1)；
Second flange (5), is set in described shaft (1) upper and solid by sealing lowering or hoisting gear (4)
Surely described first flange (2) side near described reacting furnace (9), described second flange (5) it are connected to
Edge to described reacting furnace (9) direction extend formed boss；
Compensation device, is set on described shaft (1), including elastic telescopic pipe (7) and difference
It is arranged on first annular sealing plate (6) and second annular seal plate at described elastic telescopic pipe (7) two ends
(8)；Described first annular sealing plate (6) embeds described second flange (5) near described reacting furnace (9)
It is rotatably connected in the groove that the end face of side and described boss surround and with described second flange (5), institute
State and between the second flange (5) and described first annular sealing plate (6), be provided with seal wear-resistant layer (11),
Described seal wear-resistant layer (11) and described second flange (5) and described first annular sealing plate (6)
In one removably connect；Described second annular seal plate (8) and the bell of described reacting furnace (9)
It is sealedly and fixedly connected；
Described seal wear-resistant layer (11) is connected by threaded fastener (10) with described second flange (5)；
Between described seal wear-resistant layer (11) and described first annular sealing plate (6) and described groove
Match in gap, including annulate lamella and the annular protrusion that is arranged on described annulate lamella edge, described annular
Layer is positioned at described first annular sealing plate (6) upper surface with described second flange (5) near described reaction
Between the end face of stove (9) side, described annular protrusion is positioned at the side of described first annular sealing plate (6)
Between face and described boss.
Shaft sealing device the most according to claim 1, it is characterised in that described sealing lifts
Device (4) is sleeve expansion joint.
Shaft sealing device the most according to claim 2, it is characterised in that described compensating sleeve
Device includes the first inner sleeve, outer sleeve and the second inner sleeve, described first inner sleeve and described second
Sealant it is provided with, in described first inner sleeve and described second between inner sleeve and described outer sleeve
Sleeve is respectively slidably arranged on the two ends of described outer sleeve, described first inner sleeve and described first method
Blue (2) connect, and described second inner sleeve is connected with described second flange (5).
Shaft sealing device the most according to claim 1, it is characterised in that set on described boss
It is equipped with boss tapped through hole, the position that described annular protrusion is corresponding is provided with annular protrusion screwed hole, institute
State threaded fastener (10) to coordinate institute through described boss tapped through hole with described annular protrusion screwed hole
State annular protrusion to couple together with described second flange (5).
Shaft sealing device the most according to claim 4, it is characterised in that described annular protrusion
Screwed hole is through hole, and described threaded fastener (10) one end is provided with smooth sphere, and the other end is provided with
The mating groove coordinated for screwdriver, described first annular sealing plate (6) is provided with and described smooth ball
The annular groove of face matched in clearance, described threaded fastener (10) is provided with one end of smooth sphere and passes
Described boss tapped through hole and described annular protrusion screwed hole coordinate with described annular groove.
Shaft sealing device the most according to claim 1, it is characterised in that described annulate lamella with
Described shaft (1) interference fit.
Shaft sealing device the most according to claim 1, it is characterised in that described first flange
(2) and between described shaft (1) and described second annular seal plate (8) and described reacting furnace (9)
Bell between be and be welded to connect.
8. a reacting furnace, including body of heater, be provided with through hole bell, rotationally be located in described logical
Shaft (1) in hole and the shaft being arranged between described bell and described shaft (1) are close
Seal apparatus, it is characterised in that described shaft sealing device is stirring as described in any one of claim 1-7
Mix shaft sealer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410315584.1A CN104056589B (en) | 2014-07-03 | 2014-07-03 | A kind of shaft sealing device and reacting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410315584.1A CN104056589B (en) | 2014-07-03 | 2014-07-03 | A kind of shaft sealing device and reacting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104056589A CN104056589A (en) | 2014-09-24 |
| CN104056589B true CN104056589B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410315584.1A Active CN104056589B (en) | 2014-07-03 | 2014-07-03 | A kind of shaft sealing device and reacting furnace |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201526672U (en) * | 2009-07-28 | 2010-07-14 | 沈阳北碳密封有限公司 | Novel high-temperature sealing rotary ring |
| CN202942850U (en) * | 2012-12-19 | 2013-05-22 | 余姚市兴友金属材料有限公司 | Reaction kettle stirring shaft sealing structure |
| CN203641514U (en) * | 2013-12-19 | 2014-06-11 | 马鞍山市荣亿密封材料有限责任公司 | Rotating shaft sealing device |
| CN203955224U (en) * | 2014-07-03 | 2014-11-26 | 湖南万通科技有限公司 | A kind of shaft sealing device and reacting furnace |
-
2014
- 2014-07-03 CN CN201410315584.1A patent/CN104056589B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201526672U (en) * | 2009-07-28 | 2010-07-14 | 沈阳北碳密封有限公司 | Novel high-temperature sealing rotary ring |
| CN202942850U (en) * | 2012-12-19 | 2013-05-22 | 余姚市兴友金属材料有限公司 | Reaction kettle stirring shaft sealing structure |
| CN203641514U (en) * | 2013-12-19 | 2014-06-11 | 马鞍山市荣亿密封材料有限责任公司 | Rotating shaft sealing device |
| CN203955224U (en) * | 2014-07-03 | 2014-11-26 | 湖南万通科技有限公司 | A kind of shaft sealing device and reacting furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104056589A (en) | 2014-09-24 |
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Address after: 410100 Changsha Province Economic and Technological Development Zone, Changsha, No. 99 Tong Tong Road, Hunan Applicant after: HUNAN WANTONG TECHNOLOGY CO., LTD. Address before: 410138, Changsha economic and Technological Development Zone, Hunan, Tong Tong Road, No. 99 Applicant before: Hunan Wan Tong Science and Technology Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Stirring shaft sealing device and reaction furnace Effective date of registration: 20220524 Granted publication date: 20160824 Pledgee: Hunan Xingsha Rural Commercial Bank Co.,Ltd. quantang sub branch Pledgor: HUNAN WANTONG TECHNOLOGY Co.,Ltd. Registration number: Y2022980005184 |