CN110513482A - A kind of great-leap-forward sealing structure - Google Patents
A kind of great-leap-forward sealing structure Download PDFInfo
- Publication number
- CN110513482A CN110513482A CN201810494286.1A CN201810494286A CN110513482A CN 110513482 A CN110513482 A CN 110513482A CN 201810494286 A CN201810494286 A CN 201810494286A CN 110513482 A CN110513482 A CN 110513482A
- Authority
- CN
- China
- Prior art keywords
- sealing
- rack
- joint strip
- collecting container
- liquid collecting
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 171
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 238000007689 inspection Methods 0.000 claims abstract description 31
- 210000004534 cecum Anatomy 0.000 claims abstract description 17
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000009659 non-destructive testing Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention belongs to core industry and other industry technical field of nondestructive testing, and in particular to a kind of great-leap-forward sealing structure, it is therefore an objective to solve the sealing problem that lower small diameter pipeline section is realized across major diameter pipeline section.It is characterised in that it includes liquid collecting container and rack, drop bar, sealing joint strip, sealing driving cylinder and emergency Return spring.The present invention is cooperated by shape and the deformation of sealing joint strip itself realizes the sealing function that lower small diameter pipeline section is realized across major diameter pipeline section；For cecum pipeline at the top of up big and down small, vertical state, liquid implementation inspection, the work of maintenance activity need to be used to provide solution.
Description
Technical field
The invention belongs to core industry and other industry technical field of nondestructive testing, and in particular to a kind of great-leap-forward sealing knot
Structure.
Background technique
Nuclear power station has the pipeline of many vertical top cecums, and outer dia is in up big and down small special shape, and
Lower small diameter section is provided with butt weld.
For the core first-order weld of nuclear power station, code requirement need to carry out surface and volume inspection, and above-mentioned weld seam is only capable of from outer
Portion is checked close to implementation, and fluid coupling ultrasonic examination and water-washing type liquid need to be generally used for existing detection method
Penetration inspection.Therefore just it is faced with the problem of sealing and collection for checking liquid used.
The present invention solves the sealing problem that lower small diameter pipeline section is realized across major diameter pipeline section aiming at the demand.
Summary of the invention
Present invention aim to address the sealing problems that lower small diameter pipeline section is realized across major diameter pipeline section, provide one
Kind great-leap-forward sealing structure.
The present invention is implemented as follows:
A kind of great-leap-forward sealing structure, including liquid collecting container and rack, drop bar, sealing joint strip, sealing driving
Cylinder and emergency Return spring；Liquid collecting container and rack play carrying, and undertake liquid is collected, detected object is axial,
The purposes that circumferential initial position determines；Sealing driving cylinder is fixed on the lower end of liquid collecting container and rack, close for driving
It is radially movable to seal slide plate；Drop bar is located at the lower section of liquid collecting container and rack, is fixed on sealing driving cylinder cylinder
The inside of bar, for driving sealing joint strip radially movable；Sealing joint strip is fixed on the inside of drop bar, for realizing with by
Examine the sealing between pipeline external path seal section, liquid collecting container and rack；One end of emergency Return spring and sealing are driven
It takes offence the cylinder body connection of cylinder, the end face outside of the other end and drop bar connects, in case of emergency by drop bar edge
Radially outward layback goes out.
The hollow cylindrical of liquid collecting container and rack generally upper and lower opening as described above；Liquid is collected
The lower part of container and rack outer wall is provided with annular connecting flange, for being fixedly connected with sealing driving cylinder；Liquid, which is collected, to be held
The diameter of device and rack lower ending opening is less than upper end opening diameter, and the diameter of lower ending opening is greater than to be examined by inspection cecum pipeline
The outer diameter at the above maximum gauge position in weld seam present position, it is ensured that this structure can smoothly across；In liquid collecting container and machine
Frame lower ending opening position is provided with annular protrusion axially downward, realizes sealing for being fitted close with sealing joint strip.
The upper end of sealing driving as described above cylinder block part and liquid collecting container and the connecting flange of rack are solid
Fixed connection；The inner side end of sealing driving cylinder cylinder rod is fixed on the outside of drop bar.
The generally fan-shaped plate of drop bar as described above, cross section is L shape, on the inner sidewall of L shape vertical edge
It is disposed radially fluted, for installing sealing joint strip, is disposed radially fluted, is used on the inner sidewall of L shape horizontal edge
Sealing joint strip is installed；Drop bar is close to liquid collecting container and rack lower surface along its diameter under the driving of sealing driving cylinder
Sealing, resigning movement are realized to moving back and forth.
The generally hollow fanning strip of sealing joint strip as described above；Sealing joint strip sector Inner arc is mounted on drop bar
In the groove of the inner sidewall of L shape horizontal edge；The Inner arc of sealing joint strip sector and radius side along the vertical direction setting upwards,
Downward protrusion；The inner wall of Inner arc position protrusion is by inspection part path seal section sealing surface, for small with examining pipeline outside
Diameter seal section, which is in close contact, realizes sealing；The inner wall of radial location protrusion be contiguous seal face, for adjacent sealing joint strip
Realize sealing；Upward inverted "L" shape is respectively arranged with external arc intersection position in two radiuses of sealing joint strip sector to connect
Section, is attached close to the end face of center of circle side by arc-shaped interconnecting piece two connecting pins；The arc-shaped interconnecting piece
Inner side end is liquid collecting container sealing surface, is sealed for realizing with the outer wall of liquid collecting container and rack annular protrusion；
The end face outside of the arc-shaped interconnecting piece has been disposed radially arc convex, is mounted on the inside of drop bar L shape vertical edge
In the groove of wall.
As above when sealing driving cylinder is in retracted state, sealing joint strip is inscribed diameter of a circle and is greater than liquid collecting container
And the diameter of bore of frame lower, it is ensured that can be smoothly across maximum more than by inspection weld seam present position by inspection cecum pipeline
Outer diameter position.
The corresponding sealing driving cylinder of emergency Return spring described in two as above and slide plate sealing together, when unexpected feelings
When condition occurs, by directly cutting off sealing driving cylinder pipeline, drop bar carries sealing joint strip in the work of emergency Return spring
With lower recycling, enable the safe escape of this structure by inspection cecum pipeline.
The invention also includes liquid delivery port, liquid delivery port is arranged on the outer wall of drop bar, for receiving liquid
Collect container and machine frame inside accommodates liquid discharge.
Sealing driving cylinder, slide plate sealing together and adhesive tape sealing together as described above are one group, and two are arranged altogether
It is more than group, uniformly distributed along liquid collecting container and rack connecting flange lower end.
Sealing joint strip as described above integrally uses rubber material to realize.
The beneficial effects of the present invention are:
The present invention includes that liquid collecting container and rack, drop bar, sealing joint strip, sealing driving cylinder, emergency are pulled back
Spring.It is realized by shape cooperation and the deformation of sealing joint strip itself across major diameter pipeline section and realizes lower small diameter pipeline section
Sealing function；For cecum pipeline at the top of up big and down small, vertical state, liquid implementation inspection, the work of maintenance activity need to be used to mention
Solution is supplied.
Detailed description of the invention
Fig. 1 is a kind of main view of great-leap-forward sealing structure of the invention；
Fig. 2 is a kind of bottom view of great-leap-forward sealing structure of the invention；
Fig. 3 is a kind of structural schematic diagram of the sealing joint strip of great-leap-forward sealing structure of the invention.
Wherein: 1. by inspection cecum pipeline, and 2. by inspection weld seam present position, 3. examining pipelines outside path seal section, 4. liquid
Body collection vessel and rack, 5. drop bars, 6. sealing joint strips, 7. sealing driving cylinders, 8. emergency Return springs, 9. liquid discharges
The mouth of a river, 10. liquid collecting container sealing surfaces, 11. contiguous seal faces, 12. by inspection part path seal section sealing surface.
Specific embodiment
The present invention is described further with reference to the accompanying drawings and examples.
As depicted in figs. 1 and 2, a kind of great-leap-forward sealing structure, including liquid collecting container and rack 4, drop bar 5,
Sealing joint strip 6, sealing driving cylinder 7 and emergency Return spring 8.Liquid collecting container and rack 4 play carrying, and undertake liquid
The purposes that body is collected, axial, the circumferential initial position of detected object determines.Sealing driving cylinder 7 be fixed on liquid collecting container and
The lower end of rack 4, for driving drop bar 5 radially movable.Drop bar 5 is located under liquid collecting container and rack 4
Side is fixed on the inside of sealing driving 7 cylinder rod of cylinder, for driving sealing joint strip 6 radially movable.Sealing joint strip 6 is fixed
In the inside of drop bar 5, for realizing between examining pipeline outside path seal section, liquid collecting container and rack 4
Sealing.One end of emergency Return spring 8 is connect with the cylinder body of sealing driving cylinder 7, the end face outside of the other end and drop bar 5
Connection, in case of emergency radially layback to go out by drop bar 5.
The hollow cylindrical of liquid collecting container and the generally upper and lower opening of rack 4.Liquid collecting container and rack
The lower part of 4 outer walls is provided with annular connecting flange, for being fixedly connected with sealing driving cylinder 7.Liquid collecting container and rack 4
The diameter of lower ending opening is less than upper end opening diameter, and the diameter of lower ending opening is greater than by inspection cecum pipeline 1 by inspection weld seam institute
Locate 2 or more maximum gauge position of position outer diameter, it is ensured that this structure can smoothly across.Under liquid collecting container and rack 4
End opening position is provided with annular protrusion axially downward, realizes sealing for being fitted close with sealing joint strip 6.
The upper end of sealing driving 7 cylinder part of cylinder is fixedly connected with the connecting flange of liquid collecting container and rack 4.It is close
The inner side end of envelope driving 7 cylinder rod of cylinder is fixed on the outside of drop bar 5.
The generally fan-shaped plate of drop bar 5, cross section is L shape, is disposed radially on the inner sidewall of L shape vertical edge
It is fluted, for installing sealing joint strip 6, be disposed radially on the inner sidewall of L shape horizontal edge it is fluted, for installing sealant
Item 6.Drop bar 5 is close to liquid collecting container under the driving of sealing driving cylinder 7 and 4 lower surface of rack is radially reciprocal
Sealing, resigning movement are realized in movement.
As shown in figure 3, the fanning strip that sealing joint strip 6 is generally hollow.The fan-shaped Inner arc of sealing joint strip 6 is mounted on sealing and slides
In the groove of the inner sidewall of 5 L shape horizontal edge of plate.The fan-shaped Inner arc of sealing joint strip 6 and radius side be arranged along the vertical direction to
Upper, downward protrusion.The inner wall of Inner arc position protrusion be by inspection part path seal section sealing surface 12, for outside examining pipeline
Portion's path seal section 3, which is in close contact, realizes sealing.The inner wall of radial location protrusion is contiguous seal face 11, for it is adjacent close
Seal strip 6 realizes sealing.Upward fall is respectively arranged in two fan-shaped radiuses of sealing joint strip 6 and external arc intersection position
L shape linkage section is attached close to the end face of center of circle side by arc-shaped interconnecting piece two connecting pins.It is described arc-shaped
The inner side end of interconnecting piece is liquid collecting container sealing surface 10, for outer with 4 annular protrusion of liquid collecting container and rack
Wall realizes sealing.The end face outside of the arc-shaped interconnecting piece has been disposed radially arc convex, is mounted on drop bar 5 " L "
In the groove of the inner sidewall of shape vertical edge.When sealing driving cylinder 7 is in retracted state, sealing joint strip 6 is inscribed diameter of a circle and answers
Greater than the diameter of bore of 4 lower part of liquid collecting container and rack, it is ensured that can smoothly across by inspection cecum pipeline 1 by inspection weld seam
The maximum outer diameter position in 2 or more present position.
Preferably, as shown in Fig. 2, this structure further includes liquid delivery port 9, drop bar 5 is arranged in liquid delivery port 9
On outer wall, for liquid collecting container and a certain amount of liquid of 4 inner containment of rack to be discharged.
In the present embodiment, sealing joint strip 6 is whole is realized using rubber material.
When sealing driving cylinder 7 inwardly squeezes, drop bar 5 carries sealing joint strip 6 and synchronizes inside movement, until being adjacent to
Path seal section 3 outside examining pipeline；At this time sealing joint strip 6 by inspection part path seal section sealing surface 12 and examining pipeline outside
Path seal section 3 fits closely realization sealing；The liquid collecting container sealing surface 10 and liquid collecting container and machine of sealing joint strip 6
The outer circle of 4 lower step section of frame fits closely realization sealing；Be pressurized close patch between the contiguous seal face 11 of adjacent seals adhesive tape 6
It closes and realizes sealing；To realize all sealing surfaces between liquid collecting container and rack 4 and examining pipeline outside path seal section 3
Sealing.
7 stroke of cylinder and other factors are driven according to by inspection 1 periphery situation of cecum pipeline and sealing, it can be by drop bar 5
And sealing joint strip 6 is set as N number of, restrictive condition are as follows:
1. diameter of a circle, which is inscribed, in sealing joint strip 6 should be greater than liquid collecting container and rack when sealing driving cylinder 7 is withdrawn
The diameter of bore of 4 lower parts, it is ensured that can smoothly across by inspection cecum pipeline 1 by inspection the maximum outer diameter position in 2 or more position；
2. sealing joint strip 6 is constituted one by inspection part path seal section sealing surface 12 when sealing driving cylinder 7 inwardly squeezes
A full circle simultaneously fits closely realization sealing with path seal section 3 outside examining pipeline；The liquid collecting container of sealing joint strip 6 seals
Face 10 constitutes a full circle and fits closely realization sealing with the outer circle of 4 lower step section of liquid collecting container and rack；And phase
It is pressurized between the contiguous seal face 11 of adjacent sealing joint strip 6 and fits closely realization sealing.
Two emergency Return springs 8 when the unexpected happens can for a sealing driving cylinder 7 and drop bar 5
By directly cutting off sealing driving 7 pipeline of cylinder, drop bar 5 carries sealing joint strip 6 and returns under the action of meeting an urgent need Return spring 8
It receives, enables the safe escape of this structure by inspection cecum pipeline 1.
After realizing sealing, liquid collecting container and a certain amount of liquid of 4 inner containment of rack, and internal liquid can be passed through
Liquid delivery port 9 is discharged.
When sealing driving cylinder 7 is withdrawn, drop bar 5 carries sealing joint strip 6 and is moved to outermost end the present invention, this is tied
Structure is by, by inspection 2 or more maximum gauge position of position, being reached maintenance position, sealing driving cylinder 7 is inside by inspection cecum pipeline 1
When extruding, drop bar 5 carries sealing joint strip 6 and synchronizes inside movement, and sealing joint strip 6, which is pressurized, realizes that path is close outside examining pipeline
Envelope section 3 seals between the outer circle and adjacent seals adhesive tape 6 of 4 lower step section of liquid collecting container and rack, makes sealing structure
Completely, reach sealing purpose.The present invention includes liquid collecting container and rack, drop bar, sealing joint strip, sealing driving gas
Cylinder, emergency Return spring.It is realized by shape cooperation and the deformation of sealing joint strip itself across major diameter pipeline section and realizes lower part
The sealing function of minor diameter pipeline section；For cecum pipeline at the top of up big and down small, vertical state, liquid need to be used to implement to check, repair
The work of operation provides solution.
Claims (10)
1. a kind of great-leap-forward sealing structure, it is characterised in that: it include liquid collecting container and rack (4), drop bar (5),
Sealing joint strip (6), sealing driving cylinder (7) and emergency Return spring (8)；Liquid collecting container and rack (4) play carrying,
And undertake the purposes that liquid is collected, axial, the circumferential initial position of detected object determines；Sealing driving cylinder (7) is fixed on liquid
The lower end of collection vessel and rack (4), for driving drop bar (5) radially movable；Drop bar (5) is located at liquid collection
The lower section of container and rack (4) is fixed on the inside of sealing driving cylinder (7) cylinder rod, for driving sealing joint strip (6) along diameter
To movement；Sealing joint strip (6) is fixed on the inside of drop bar (5), for realizing with path seal section, liquid outside examining pipeline
Sealing between body collection vessel and rack (4)；One end of emergency Return spring (8) and the cylinder body of sealing driving cylinder (7) connect
Connect, the other end is connect with the end face outside of drop bar (5), in case of emergency by drop bar (5) radially
Layback goes out.
2. great-leap-forward sealing structure according to claim 1, it is characterised in that: the liquid collecting container and rack
(4) the generally hollow cylindrical of upper and lower opening；The lower part of liquid collecting container and rack (4) outer wall is provided with annular
Connecting flange, for being fixedly connected with sealing driving cylinder (7)；The diameter of liquid collecting container and rack (4) lower ending opening is small
In upper end opening diameter, the diameter of lower ending opening is greater than by inspection cecum pipeline (1) more than by inspection weld seam present position (2) most
The outer diameter at major diameter position, it is ensured that this structure can smoothly across；On liquid collecting container and rack (4) lower ending opening position edge
It is axially downwardly provided with annular protrusion, realizes sealing for being fitted close with sealing joint strip (6).
3. great-leap-forward sealing structure according to claim 2, it is characterised in that: the sealing drives cylinder (7) cylinder body
Partial upper end is fixedly connected with the connecting flange of liquid collecting container and rack (4)；Sealing drives the interior of cylinder (7) cylinder rod
Side end face is fixed on the outside of drop bar (5).
4. great-leap-forward sealing structure according to claim 2, it is characterised in that: the drop bar (5) is generally fanned
Shape plate, cross section are L shape, be disposed radially on the inner sidewall of L shape vertical edge it is fluted, for installing sealing joint strip
(6), be disposed radially on the inner sidewall of L shape horizontal edge it is fluted, for installing sealing joint strip (6)；Drop bar (5) is close
Be close under the driving of envelope driving cylinder (7) liquid collecting container and rack (4) lower surface radially moves back and forth realization seal,
Resigning movement.
5. great-leap-forward sealing structure according to claim 4, it is characterised in that: the sealing joint strip (6) generally in
Empty fanning strip；In the groove for the inner sidewall that sealing joint strip (6) sector Inner arc is mounted on drop bar (5) L shape horizontal edge；In
Upward, downward protrusion is arranged in the Inner arc of sealing joint strip (6) sector and radius side along the vertical direction；Inner arc position protrusion
Inner wall be by inspection part path seal section sealing surface (12), it is real for being in close contact with path seal section (3) outside examining pipeline
Now seal；The inner wall of radial location protrusion is contiguous seal face (11), is sealed for realizing with adjacent sealing joint strip (6)；In
Two radiuses of sealing joint strip (6) sector and external arc intersection position are respectively arranged with upward inverted "L" shape linkage section, at two
Connecting pin is attached close to the end face of center of circle side by arc-shaped interconnecting piece；The inner side end of the arc-shaped interconnecting piece is
Liquid collecting container sealing surface (10) is sealed for realizing with the outer wall of liquid collecting container and rack (4) annular protrusion；It is described
The end face outside of arc-shaped interconnecting piece has been disposed radially arc convex, is mounted on the inner sidewall of drop bar (5) L shape vertical edge
Groove in.
6. great-leap-forward sealing structure according to claim 5, it is characterised in that: be in and withdraw in sealing driving cylinder (7)
When state, the diameter of bore that diameter of a circle is greater than liquid collecting container and rack (4) lower part is inscribed in sealing joint strip (6), it is ensured that energy
It is enough smoothly across by inspection cecum pipeline (1) more than by inspection weld seam present position (2) maximum outer diameter position.
7. great-leap-forward sealing structure according to claim 1, it is characterised in that: emergency Return spring (8) described in two
Corresponding sealing driving cylinder (7) and slide plate sealing together (5) are driven by directly cutting off sealing when the unexpected happens
It takes offence cylinder (7) pipeline, drop bar (5) carries sealing joint strip (6) and recycles under the action of meeting an urgent need Return spring (8), makes this knot
Structure can safe escape by inspection cecum pipeline (1).
8. great-leap-forward sealing structure according to claim 1, it is characterised in that: it further includes liquid delivery port (9), liquid
Water outlet (9) is arranged on the outer wall of drop bar (5), for arranging liquid collecting container and rack (4) inner containment liquid
Out.
9. great-leap-forward sealing structure according to claim 5, it is characterised in that: described sealing driving cylinder (7),
Slide plate (5) sealing together and adhesive tape sealing together (6) are one group, be arranged altogether it is more than two, along liquid collecting container and rack (4)
Connecting flange lower end is uniformly distributed.
10. great-leap-forward sealing structure described in -10 any one according to claim 1, it is characterised in that: the sealing joint strip
(6) whole to be realized using rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810494286.1A CN110513482B (en) | 2018-05-22 | 2018-05-22 | Crossing type sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810494286.1A CN110513482B (en) | 2018-05-22 | 2018-05-22 | Crossing type sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110513482A true CN110513482A (en) | 2019-11-29 |
| CN110513482B CN110513482B (en) | 2024-10-18 |
Family
ID=68622140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810494286.1A Active CN110513482B (en) | 2018-05-22 | 2018-05-22 | Crossing type sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110513482B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3934952A (en) * | 1975-01-24 | 1976-01-27 | Waukesha Bearings Corporation | Leakproof seal for bearings |
| US5611546A (en) * | 1994-05-17 | 1997-03-18 | Siemens Aktiengesellschaft | Labyrinth seal having a pressure inducing fan means |
| CN103726409A (en) * | 2013-12-19 | 2014-04-16 | 云南中烟昆船瑞升科技有限公司 | End face sealing device of reconstituted tobacco coating machine |
| CN104074491A (en) * | 2014-07-09 | 2014-10-01 | 中国石油集团渤海钻探工程有限公司 | Oil pipe bridge plug |
| CN208503479U (en) * | 2018-05-22 | 2019-02-15 | 核动力运行研究所 | A kind of great-leap-forward sealing structure |
-
2018
- 2018-05-22 CN CN201810494286.1A patent/CN110513482B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3934952A (en) * | 1975-01-24 | 1976-01-27 | Waukesha Bearings Corporation | Leakproof seal for bearings |
| US5611546A (en) * | 1994-05-17 | 1997-03-18 | Siemens Aktiengesellschaft | Labyrinth seal having a pressure inducing fan means |
| CN103726409A (en) * | 2013-12-19 | 2014-04-16 | 云南中烟昆船瑞升科技有限公司 | End face sealing device of reconstituted tobacco coating machine |
| CN104074491A (en) * | 2014-07-09 | 2014-10-01 | 中国石油集团渤海钻探工程有限公司 | Oil pipe bridge plug |
| CN208503479U (en) * | 2018-05-22 | 2019-02-15 | 核动力运行研究所 | A kind of great-leap-forward sealing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110513482B (en) | 2024-10-18 |
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