CN102877796B - Guide sleeve for drill rod of rotary drill - Google Patents
Guide sleeve for drill rod of rotary drill Download PDFInfo
- Publication number
- CN102877796B CN102877796B CN201210410733.3A CN201210410733A CN102877796B CN 102877796 B CN102877796 B CN 102877796B CN 201210410733 A CN201210410733 A CN 201210410733A CN 102877796 B CN102877796 B CN 102877796B
- Authority
- CN
- China
- Prior art keywords
- overcoat
- rolling bearing
- clamp nut
- inner sleeve
- spacer
- 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.)
- Active
Links
Landscapes
- Rolling Contact Bearings (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to a kind of guide sleeve for drill rod of rotary drill, large and can only nonrecoverable technical problem to solve life-span short, operating noise that existing guide pin bushing exists.The guide sleeve for drill rod of rotary drill that the present invention relates to comprises overcoat, described overcoat endoporus be two sections stepped, the inside is provided with inner sleeve, inner sleeve and overcoat diameter of bore smaller part matched in clearance; The rolling bearing being close to overcoat endoporus cascaded surface, the clamp nut be threaded with overcoat diameter of bore larger portion openend are installed between described inner sleeve with overcoat diameter of bore larger portion, are against the first spacer between rolling bearing and clamp nut; The inner ring interference fit of described inner sleeve and rolling bearing, the outer ring of described rolling bearing and overcoat interference fit, described inner sleeve and clamp nut matched in clearance; The outer face of described clamp nut is provided with the disassembly mechanism of clamp nut for convenience detach.
Description
Technical field
The present invention relates to a kind of guide sleeve for drill rod of rotary drill.
Background technology
As shown in accompanying drawing 7 and accompanying drawing 8, the drilling rod guide pin bushing that the rotary drill in the existing mine of China uses is the stepped sleeve of the overall outer circumference surface manufactured of hardening agent steel, and this sleeve diameter larger portion is radially centrosymmetric has two shape of a hoof grooves.During rotary drill boring, drilling rod guide pin bushing is fixed by this horseshoe type groove on chain-wales, then starts rig and drilling rod is rotated in drilling rod guide pin bushing.Be matched in clearance between drilling rod and drilling rod guide pin bushing, therefore can produce sliding friction between them.This sliding friction can produce very large noise, produces larger impact to the occupational safety and health of surrounding enviroment and workman.And increasing along with rotary drill drilling hole amount, the wearing and tearing causing drilling rod and drilling rod guide pin bushing to produce by this sliding friction, the gap of drilling rod and drilling rod guide pin bushing can be caused constantly to expand, and the dust that deslagging is caused escapes into outside guide pin bushing from this gap.These dust parts of escaping out are fallen in other operating mechanism of rotary drill, and bring very large difficulty to the maintenance of these operating mechanisms, another part then floats in air, produces bad impact to the occupational safety and health of surrounding enviroment and workman.Those dusts be trapped in drilling rod and drilling rod guide pin bushing gap of not escaping out, then can strengthen the wearing and tearing between drilling rod and drilling rod guide pin bushing further, reduces the application life of drilling rod and drilling rod guide pin bushing.Such guide sleeve for drill rod of rotary drill may wear to a certain degree will entirety scrap, and belongs to disposable component.
Summary of the invention
The object of this invention is to provide that a kind of life-span is long, operating noise is smaller and can repeatedly change reusable guide sleeve for drill rod of rotary drill.
The guide sleeve for drill rod of rotary drill that technical solution of the present invention relates to comprises overcoat, described overcoat endoporus be two sections stepped, the inside is provided with inner sleeve, inner sleeve and overcoat diameter of bore smaller part matched in clearance; The rolling bearing being close to overcoat endoporus cascaded surface, the clamp nut be threaded with overcoat diameter of bore larger portion openend are installed between described inner sleeve with overcoat diameter of bore larger portion, be against the 3rd spacer between rolling bearing and clamp nut, inner sleeve outer circumference surface between rolling bearing and clamp nut is provided with bulge loop, and the axial length of described bulge loop is slightly less than the 3rd spacer length; The cascaded surface of overcoat endoporus is divided into two sections, near the convex annular table top of rolling bearing inner ring, and should a little less than the contact anchor ring of housing washer; The inner ring of described rolling bearing and inner sleeve interference fit, the outer ring of described rolling bearing and overcoat interference fit, described overcoat and the 3rd spacer matched in clearance, described inner sleeve and clamp nut matched in clearance, the outer face of described clamp nut is provided with the disassembly mechanism of convenient mounting or dismounting clamp nut.
After adopting technical scheme of the present invention, matched in clearance between the endoporus of inner sleeve and drill rod of blast-hole drill, all then interference fit between inner sleeve outer circumference surface and rolling bearing inner ring, between the outer ring of rolling bearing and overcoat endoporus, therefore rotary drill is when boring a hole, drilling rod drives rolling bearing inner ring to rotate by inner sleeve under the effect of frictional force, so just change the friction between drilling rod and guide pin bushing into rolling friction by original sliding friction, decrease frictional force, extend the application life of guide pin bushing and drilling rod.And rolling bearing generally has certain play, and be all injected with grease, these can slow down the impact between drilling rod and guide pin bushing, and the noise that rotary drill is operationally produced is also smaller.Due to clamp nut being provided with mounting mechanism, clamp nut can be installed and removed, when being arranged on any one damage of components between jacket and inner sleeve like this, they can be installed and removed, timely quick-replaceable, to extend the whole service life of guide pin bushing.
The further technical scheme of the present invention is: the cascaded surface of described overcoat endoporus has through hole, is provided with the plug of this through hole of sealing in described through hole.
During rotary drill boring, guide pin bushing is axially perpendicular to ground, and that one end of overcoat diameter of bore smaller part is towards landing, the dust in such external world and water capacity The book of Changes cross the gap between clamp nut and inner sleeve, enter the rolling bearing between overcoat diameter of bore larger portion and inner sleeve, increase the internal friction of rolling bearing.Install this through hole and with sealing this through hole plug after, dust can not enter rolling bearing through this through hole at ordinary times, when needed, removing sealing plug can go out emissions such as the muddy water entered between overcoat and diameter of bore larger portion in time, extends the life-span of rolling bearing.
Because rolling bearing and inner sleeve and overcoat are all interference fit, after rolling bearing damages, the demounting tools such as iron can be stretched in this through hole and prop up rolling bearing, then with hammer iron, rolling bearing is disassembled, or screw in this through hole with bare headed screw and back down rolling bearing, then with drawing the special tools such as horse rolling bearing dismounting to be come, the dismounting of rolling bearing is facilitated.
The further technical scheme of the present invention is: the through hole being positioned at overcoat endoporus cascaded surface faces the outer ring of rolling bearing.
When rolling bearing damages very serious, after such as retainer destroys, the inner ring of rolling bearing can be separated with outer ring, due to inner ring and inner sleeve interference fit, outer ring and the overcoat interference fit of rolling bearing, if the through hole being positioned at overcoat endoporus cascaded surface faces toward the inner ring of rolling bearing retainer or rolling bearing, then iron can not arrive to the outer ring of rolling bearing, also just end thrust can not be applied to housing washer, thus the outer ring of rolling bearing can not be disassembled, adopt this technical scheme then can pull down the outer ring of rolling bearing in this case easily.The inner ring of rolling bearing due to inner sleeve interference fit, inner sleeve can be beaten after dismounting clamp nut and along band, the inner ring of rolling bearing be disassembled.
The further technical scheme of the present invention is: the through hole on described overcoat endoporus cascaded surface is divided into screwed hole section and unthreaded hole section, is threaded with described plug, and the diameter of described through hole whorl hole section is greater than the diameter of unthreaded hole section.
Adopt this technical scheme, because the screwed hole section diameter of through hole is greater than unthreaded hole section diameter, like this when dismantling rolling bearing, putting in the instruments such as the iron of through hole and being just not easy to encounter screw thread, avoiding the damage to screwed hole section in through hole.
The further technical scheme of the present invention is that described rolling bearing is 1, the outer circumference surface being positioned at overcoat inner peripheral surface in the middle part of rolling bearing and inner sleeve is provided with the annular groove of guide angle.
When drill pipe diameter is larger, because drilling rod runout is relatively little in this case, can select 1 rolling bearing, the general axial dimension of certain this rolling bearing is larger, such as needle bearing.Number of parts can be reduced like this, and compared with the rolling bearing equal with race diameter, needle bearing inner ring diameter is larger, and the inner sleeve diameter coordinated with needle bearing inner ring accordingly can more greatly, also just in time can hold the larger drilling rod of diameter when overcoat diameter the same.After overcoat inner peripheral surface in the middle part of rolling bearing and the outer circumference surface of inner sleeve are provided with the annular groove of guide angle, rolling bearing is easy to the annular groove through this guide angle when installing and removing, facilitate the mounting or dismounting of rolling bearing.
The further technical scheme of the present invention is: described rolling bearing has individual more than 2, the first spacer and the second spacer that prop up their outer rings and inner ring are respectively installed between described rolling bearing, the outer circumference surface being positioned at overcoat inner peripheral surface in the middle part of the first spacer and the second spacer and inner sleeve is provided with the annular groove of guide angle, described first spacer and overcoat, described second spacer and inner sleeve are matched in clearance.
When drill pipe diameter is smaller, because drilling rod runout is relatively large, corresponding guide pin bushing length is also larger, and a rolling bearing is inadequate, generally will select 2 bearings or 3 bearings, and the axial length of the rolling bearing in this case selected can be less than normal.Then lay spacer between rolling bearing, cause roller bearing shop inner ring or outer ring axial location difficulty to avoid rolling bearing directly to connect, and the direct shock produced.Overcoat inner peripheral surface in the middle part of first spacer and the second spacer and the outer circumference surface of inner sleeve are provided with the annular groove of guide angle, then more can facilitate the mounting or dismounting of the rolling bearing that in this case selected axial length is less.First spacer and overcoat, described second spacer and inner sleeve are matched in clearance, also more can facilitate their mounting or dismounting.
The further technical scheme of the present invention is: it is the blind hole or the boss that are arranged on circumference place in the middle part of outer face that the outer face of described clamp nut is provided with the convenient disassembly mechanism installing and removing clamp nut.
Adopt this technical scheme, when installing and removing clamp nut, iron can be stretched into blind hole or be against on boss, such mounting or dismounting tools there has been the point of application, conveniently installs and removes guide pin bushing; And blind hole and boss structure are simple, easily process.
The further technical scheme of the present invention is: clamp nut, overcoat diameter of bore smaller part are provided with seal respectively and between inner sleeve.
Preferably, described seal can be O-ring seals, or the cross section made by wool felt etc. is the sealing ring of rectangle.
Installing seal can effectively prevent extraneous dust and the gap of water between clamp nut, jacket and inner sleeve from entering rolling bearing, reduces the internal friction of rolling bearing, extends the life-span of rolling bearing.O-ring seals, or the cross section made by wool felt etc. is that the sealing ring of rectangle belongs to working standard part, easily obtain, and effect is also pretty good.
Accompanying drawing explanation
The lateral view of Fig. 1 guide pin bushing of the present invention
What Fig. 2 only installed 2 rolling bearing guide pin bushings along Fig. 1 shape of a hoof groove center line partly cuts open figure
Inner sleeve shown in Fig. 3 Fig. 2 is near the openend enlarged drawing of clamp nut
Overcoat shown in Fig. 4 Fig. 2 is near the enlarged drawing at the 3rd spacer place
The enlarged drawing of through hole shown in Fig. 5 Fig. 2
What Fig. 6 only installed 1 rolling bearing guide pin bushing along shape of a hoof groove center line partly cuts open figure
The guide pin bushing lateral view of Fig. 7 prior art
The guide pin bushing that Fig. 8 does along Fig. 7 shape of a hoof groove center line partly cuts open figure
Detailed description of the invention
As described in Figure 1, guide pin bushing of the present invention comprises the overcoat 1 of tubular, and the outer circumference surface of described overcoat 1 is stepped, the end face of the larger one end of diameter radially has two horseshoe shaped recess for fixing guide pin bushing.
As shown in Figure 2, the endoporus of described overcoat 1 be two sections stepped, the inside is provided with the inner sleeve 2 that runs through whole overcoat 1 endoporus.The outside diameter of described inner sleeve 2 is slightly less than the diameter of overcoat 1 diameter of bore smaller part, with overcoat 1 diameter of bore smaller part matched in clearance, thus between overcoat 1 diameter of bore larger portion and inner sleeve 2, forms the blind hole of a ring-type.Be provided with the first rolling bearing 31, second rolling bearing 32 and clamp nut 4 inside this blind hole successively, as shown in Figure 3, inner sleeve 2 cylindrical two ends are equipped with the little guide angle taper seat 22 being convenient to load.
The end face of described first rolling bearing 31 is close to the cascaded surface of overcoat 1 endoporus, is provided with the first spacer 51 and the second spacer 52 of the cycle surface propping up the first rolling bearing 31 and the second rolling bearing 32 respectively and inner ring end face between the first rolling bearing 31 and the second rolling bearing 32.Be provided with the 3rd spacer 53 between described second rolling bearing 32 and clamp nut 4, described 3rd spacer 53 one end props up clamp nut 4 inner face, and the other end props up the cycle surface of the second rolling bearing 32.The outer circumference surface of described clamp nut 4 has screw thread, the openend of overcoat 1 diameter of bore larger portion is provided with internal thread, be threaded between clamp nut 4 and overcoat 1, as shown in Figure 4, the openend internal thread of overcoat 1 diameter larger portion is neighbouring is provided with the 3rd spacer 53 cooperation place the little guide angle taper seat 11 being convenient to load.Rotatably compress nut 4 and just can compress the 3rd spacer 53, second rolling bearing 32, first spacer 51 and the second spacer 52 and the first rolling bearing 31 being arranged on overcoat 1 endoporus.Inner sleeve 2 outer circumference surface between rolling bearing 32 and clamp nut 4 is provided with bulge loop 21, and an end face of bulge loop 21 is near the inner face of clamp nut 4, and the other end of bulge loop 21 is near the inner ring end face of the second rolling bearing 32.The axial length of bulge loop 21 is slightly less than the 3rd spacer 53 length, and bulge loop 21 both can ensure rotating freely of rolling bearing 32, can limit again the axially-movable of the second rolling bearing 32 inner ring, inner sleeve 2 can also be stoped to come off under the effect of drilling rod axial force; For convenience of mounting or dismounting, the endoporus matched in clearance of the first spacer 51 and the 3rd spacer 53 and overcoat 1, the second spacer 52 endoporus and inner sleeve 2 are also matched in clearance.
The inner peripheral surface of overcoat 1 between first rolling bearing 31 and the second rolling bearing 32 and the outer circumference surface of inner sleeve 2 also arrange the annular recess 6 that guide angle is housed, like this when mounting or dismounting first rolling bearing 31 and the first spacer 51 and the second spacer 52, they are easily via this position.
The cascaded surface of overcoat 1 endoporus is provided with several through holes 7 uniform, the plug 8 of this through hole of sealing is provided with in through hole 7, this plug 8 can be the part of rubber stopper and so on, but is preferably screw, now has the screw thread with this screw fit near overcoat 1 endoporus end bottom.Turn on screw just by emissions such as the muddy water that enters between overcoat 1 and inner sleeve 2 out, this screw to be tightened and then can prevent dust from entering the first rolling bearing 31 and the second rolling bearing 32 by through hole 7.Simultaneously when dismantling guide pin bushing, the demounting tools such as iron can be stretched in this through hole 7 and propping up the first rolling bearing 31, then beaing iron gently with hammer, the component between overcoat 1 and inner sleeve 2 are taken apart.Through hole 7 is generally facing to outer ring or the retainer of the first rolling bearing 31, shown in Fig. 2 is a kind of preferred version, namely through hole 7 faces the outer ring of the first rolling bearing 31, like this first rolling bearing 31 damage more severe, namely, when fall apart in the inner ring of the first rolling bearing 31 and outer ring, the outer ring of the first rolling bearing 31 can also be pulled down easily.For ensureing that rolling bearing 31 inner ring rotates freely, the cascaded surface of overcoat 1 endoporus is divided into two sections, near the convex annular table top of rolling bearing 31 inner ring, and should a little less than the contact anchor ring of rolling bearing 31 outer ring.
On clamp nut 4, in the middle part of clamp nut 4 outer face, circumference place is along the circumferential direction provided with uniform several blind hole 9 or boss, like this when installing and removing clamp nut 4, iron can be propped up blind hole 9 or boss, then impact iron gently with instruments such as hammers, clamp nut 4 is installed and removed.
Described inner sleeve 2 outer circumference surface respectively and clamp nut 4 inner peripheral surface, the minimum portion of overcoat 1 diameter of bore inner peripheral surface between be provided with seal.Described seal can be O-ring seals 10, or the cross section made by wool felt etc. is rectangular ring sealing ring.
As shown in Figure 5, the through hole 7 on overcoat 1 endoporus cascaded surface is divided into screwed hole section 71 and unthreaded hole section 72, and be threaded with described plug 8, the diameter of described through hole whorl hole section 71 is greater than the diameter of unthreaded hole section 72.
As shown in Figure 6, also a rolling bearing 3 only can be established in the blind hole by the ring-type formed between overcoat 1 diameter of bore larger portion and inner sleeve 2, certainly such rolling bearing 3 axial length is larger, be positioned at the groove 6 inner peripheral surface of the overcoat 1 in the middle part of this rolling bearing 3 and the outer circumference surface of inner sleeve 2 be provided with the ring-type of guide angle, to facilitate the mounting or dismounting of rolling bearing 3.The structure being provided with all the other aspects of rotary drill guide pin bushing of 1 rolling bearing can be the same with the rotary drill guide pin bushing arranging more than 2 rolling bearings.
Claims (9)
1. a guide sleeve for drill rod of rotary drill, comprises overcoat, it is characterized in that: described overcoat endoporus be two sections stepped, the inside is provided with inner sleeve, the diameter of bore smaller part matched in clearance of inner sleeve and overcoat;
The rolling bearing being close to overcoat endoporus cascaded surface, the clamp nut be threaded with overcoat diameter of bore larger portion openend are installed between described inner sleeve and the diameter of bore larger portion of overcoat, be against the 3rd spacer between rolling bearing and clamp nut, inner sleeve outer circumference surface between rolling bearing and clamp nut is provided with bulge loop, and the axial length of described bulge loop is slightly less than the length of the 3rd spacer;
Overcoat endoporus cascaded surface is divided into two sections, near the convex annular table top of rolling bearing inner ring, a little less than the contact anchor ring of housing washer;
The inner ring of described rolling bearing and inner sleeve interference fit, the outer ring of described rolling bearing and overcoat interference fit, described 3rd spacer and overcoat matched in clearance, described inner sleeve and clamp nut matched in clearance;
The outer face of described clamp nut is provided with the disassembly mechanism of clamp nut for convenience detach.
2. guide sleeve for drill rod of rotary drill according to claim 1, the cascaded surface of described overcoat endoporus has through hole, is provided with the plug of this through hole of sealing in described through hole.
3. guide sleeve for drill rod of rotary drill according to claim 2, described in be positioned at overcoat endoporus cascaded surface through hole face the outer ring of rolling bearing.
4. the guide sleeve for drill rod of rotary drill according to Claims 2 or 3, the through hole on described overcoat endoporus cascaded surface is divided into screwed hole section and unthreaded hole section, is threaded with described plug, and the diameter of described through hole whorl hole section is greater than the diameter of unthreaded hole section.
5. guide sleeve for drill rod of rotary drill according to claim 1, described rolling bearing is 1, the outer circumference surface being positioned at overcoat inner peripheral surface in the middle part of rolling bearing and inner sleeve is provided with the annular groove of guide angle.
6. guide sleeve for drill rod of rotary drill according to claim 1, described rolling bearing has more than 2, the first spacer and the second spacer that prop up their outer rings and inner ring are respectively installed between described rolling bearing, the outer circumference surface being positioned at overcoat inner peripheral surface in the middle part of the first spacer and the second spacer and inner sleeve is provided with the annular groove of guide angle, described first spacer and overcoat, described second spacer and inner sleeve are matched in clearance.
7. guide sleeve for drill rod of rotary drill according to claim 1, described in be positioned at the clamp nut for convenience detach of clamp nut outer face disassembly mechanism be the blind hole or the boss that are arranged on circumference place in the middle part of outer face.
8. guide sleeve for drill rod of rotary drill according to claim 1, described clamp nut, overcoat diameter of bore smaller part are provided with seal respectively and between inner sleeve.
9. guide sleeve for drill rod of rotary drill according to claim 8, is characterized in that, described in the seal be arranged between clamp nut, the diameter smaller part of overcoat endoporus and inner sleeve be O-ring seals, or the cross section made by wool felt is the sealing ring of rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410733.3A CN102877796B (en) | 2012-10-24 | 2012-10-24 | Guide sleeve for drill rod of rotary drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210410733.3A CN102877796B (en) | 2012-10-24 | 2012-10-24 | Guide sleeve for drill rod of rotary drill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102877796A CN102877796A (en) | 2013-01-16 |
| CN102877796B true CN102877796B (en) | 2015-07-29 |
Family
ID=47479286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210410733.3A Active CN102877796B (en) | 2012-10-24 | 2012-10-24 | Guide sleeve for drill rod of rotary drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102877796B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4062412A (en) * | 1976-01-29 | 1977-12-13 | The United States Of America As Represented By The Secretary Of The Interior | Flexible shaft drilling system |
| DE3743817C2 (en) * | 1987-12-23 | 1995-11-02 | Hilti Ag | Rock, drill and chisel tools |
| CN2251037Y (en) * | 1996-01-05 | 1997-04-02 | 唐山钢铁集团有限责任公司 | Tri-cone rotary drilling rod |
| CN201021605Y (en) * | 2007-03-08 | 2008-02-13 | 滨州市天福石化机械有限责任公司 | Piston deviated friction preventive oil pumping pole |
| CN201588561U (en) * | 2009-11-26 | 2010-09-22 | 刘峻 | Well drilling rod with spiral guide sleeve |
| CN203114185U (en) * | 2012-10-24 | 2013-08-07 | 中钢集团衡阳重机有限公司 | Drill rod guide sleeve for rotary drill |
-
2012
- 2012-10-24 CN CN201210410733.3A patent/CN102877796B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102877796A (en) | 2013-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206054555U (en) | A kind of electric dynamometer intermediate support | |
| CN202612387U (en) | Split self-aligning sliding bearing | |
| CN201016365Y (en) | Readily detachable bearing support structure | |
| CN102877796B (en) | Guide sleeve for drill rod of rotary drill | |
| CN203114185U (en) | Drill rod guide sleeve for rotary drill | |
| RU174332U1 (en) | Wellhead rotary sealant | |
| CN202108881U (en) | Work roll thrust bearing | |
| CN202825713U (en) | Inner bore oilless bearing dismounting device | |
| CN204984297U (en) | Non -rotating stabilizer | |
| CN203868103U (en) | Guide pulley device | |
| CN204253626U (en) | Full coverage formula shield bearing | |
| CN208203784U (en) | Hinging pin shaft | |
| CN108798666B (en) | Underground maintenance-free travelling mechanism of low seam coal mining machine and underground maintenance method thereof | |
| CN105756578B (en) | A kind of drilling tool rotation supporting structure for raise boring machine | |
| CN105275980A (en) | Conical roller bearing | |
| CN205350060U (en) | Tandem type bearing for drilling tool | |
| CN203570238U (en) | New type single action mechanism of drill | |
| CN203140431U (en) | Roller structure of support mandril | |
| CN201851670U (en) | Magnetic mechanical oil seal | |
| CN204122170U (en) | A kind of roll squeezer roller assembly | |
| CN108302114A (en) | Hinging pin shaft | |
| CN102418743A (en) | Rolling bearing unit | |
| CN203796272U (en) | Disc cutter | |
| CN203604418U (en) | Embedded main shaft mechanism with damping function | |
| CN111975287B (en) | Mounting process for hub cap of impeller of nuclear main pump |
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 | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180627 Address after: No. 1, Dongfeng Road, Zhu Hui District, Hengyang, Hunan Patentee after: China Steel Group Hengyang Machinery Co., Ltd. Address before: No. 1, Dongfeng Road, Zhu Hui District, Hengyang, Hunan Patentee before: Sinosteel Hengyang Machinery Co., Ltd. |