CN106439013B - A kind of ring pipe sealing ring and its processing method for ultralow temperature dynamic sealing - Google Patents
A kind of ring pipe sealing ring and its processing method for ultralow temperature dynamic sealing Download PDFInfo
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- CN106439013B CN106439013B CN201610709967.6A CN201610709967A CN106439013B CN 106439013 B CN106439013 B CN 106439013B CN 201610709967 A CN201610709967 A CN 201610709967A CN 106439013 B CN106439013 B CN 106439013B
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- 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
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/068—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing swelling under working conditions
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a kind of ring pipe sealing ring for ultralow temperature dynamic sealing, including the pipe equipped with hollow cavity, and one group of air admission hole being arranged on pipe, the pipe in a ring, and are equipped with supporting item in its hollow cavity.The sealing ring of this design can be made of relatively flexible low temperature material, while ensureing sealing effect, the static sealing that can be used under ultralow-temperature operation conditions and the dynamic sealing for being slidingly sealed and being used under ultralow-temperature operation conditions；When inner cavity does not have Fluid pressure, the pipe of stable support force support thin-walled is provided by internal support, prevents pipe conquassation, failure；When high-pressure fluid, which enters tube cavity, produces pressure difference, the pipe of thin-walled has enough deformabilities, can be fitted closely with metal surface, and sealing effect is good；And when two seal face relative separations, sealing ring has enough intensity to bear pressure difference alone, will not break, bursts, fail.
Description
Technical field
It is more particularly to a kind of for ultralow temperature dynamic sealing the present invention relates to the technical field of the sealing of very low temperature flow
Ring pipe sealing ring.
Background technology
Ultralow temperature sealing ring is mainly used for very low temperature flow, such as the sealing of LNG, liquid hydrogen, liquid oxygen and liquid nitrogen etc., Ke Yiyong
In the sealing of LNG automobiles, the extremely low temperature tank of steamer and filler, rocket, the liquid fuel storage tank and cartridge of space shuttle
The sealing on road, and other occasions for needing to use ultralow temperature sealing.
The shortcomings that existing ultralow temperature sealing ring in market, most conventional is O-ring seal, this sealing ring is, seals
The good material of effect, such as fluorubber, nitrile rubber or sealing ring made of silica gel material, all can not resistance to ultralow temperature, its
Elasticity and mechanical mechanics property under ultralow-temperature operation conditions significantly decay, easily damage failure；It is and current international common low temperature resistant
Material, mainly PTFE and PCTFE and derivative modified material, these materials stable mechanical property under ultralow-temperature operation conditions,
But compared with rubber and silica gel, its poor flexibility, hardness are high, are not enough to produce enough deformation after stress close to realize
Envelope.
In order to overcome the above problem, there is a kind of ultralow temperature sealing ring of half opening built-in metal spring ring in foreign countries, such as
Shown in Fig. 1, including material for the outer ring 101 of the half opening of low-temperature resistant plastic such as PTFE or PCTFE and sheet metal winding and
Into metal spring inner ring 102.This structure provides the support of stabilization using metal spring inner ring 102 under ultralow-temperature operation conditions
Power, protects outer ring 101, prevents outer ring 101 from destructive deformation occurs after being pressed；It is relatively soft using relatively thin outer ring 101 at the same time
Soft, the characteristics of being easily deformed, when open side has gases at high pressure or liquid into fashionable, using pressure difference, strut outer ring 101, make
Press against on sealing surface tightly of outer ring 101, substantially increases sealing performance.
But the ultralow temperature sealing ring of this half opening built-in metal spring ring has the following disadvantages：It is primarily adapted for use in static state
Seal and be slidingly sealed, it may not apply to dynamic sealing.Because when two seal faces separate in opposite directions, be open cavity pressure
More than the pressure at the sealing back side, two lips 103 of outer ring 101 can by pressure tightly be fitted in seal face, with sealed end
The opposite separation in face, two lips 103 of outer ring 101 are burst, are torn, and cause sealing ring to fail.
Above-mentioned being slidingly sealed refers to that two sealing surfaces do the parallel or similar sealing moved in parallel relatively, once graininess
Dust or other foreign matters enter sealing mating surface, permanent scratch can be caused to sealing surface, so as to lead during being slidingly sealed
Serious leakage failure is caused, causes security risk；Above-mentioned dynamic sealing refers to the sealing separated in opposite directions of two seal faces, by
Slided between sealing surface without opposite, avoid scuffing and abrasion of the foreign matter to sealing surface.
The content of the invention
The purpose of invention：The present invention discloses a kind of ring pipe sealing ring for ultralow temperature dynamic sealing, this design
Sealing ring can be made of relatively flexible low temperature material, the static sealing that can be used under ultralow-temperature operation conditions and be slidingly sealed,
The dynamic sealing that can be used for again under ultralow-temperature operation conditions；When inner cavity does not have Fluid pressure, stable branch is provided by internal support
Support force supports the pipe of thin-walled, prevents pipe conquassation, failure；When high-pressure fluid, which enters tube cavity, produces pressure difference, the pipe of thin-walled has foot
Enough deformabilities, can fit closely with metal surface, and sealing effect is good；It is and close when two seal face relative separations
Seal has enough intensity to bear pressure difference alone, will not break, bursts, fail.
Technical solution：In order to realize the above object the invention discloses a kind of ring pipe for ultralow temperature dynamic sealing
Sealing ring, including the pipe equipped with hollow cavity, and one group of air admission hole being arranged on pipe, the pipe in a ring, and wherein
Supporting item is equipped with cavity body.When inner cavity does not have Fluid pressure, supporting item provides stable support force, supports the pipe of thin-walled, prevents
Only pipe conquassation, failure；When high-pressure fluid, which enters tube cavity, produces pressure difference, the pipe of thin-walled is more soft, it has enough deformation
Ability, can closely be bonded with metal surface, have good sealing effect；Though sealing ring is provided with air admission hole, it is still one
A overall pipe, when high-pressure fluid, which enters pipe, produces pressure difference and two seal face relative separations, integral tube has enough
Intensity bears alone pressure difference, will not burst, fail；The sealing ring of this design can be made of the low temperature material of flexible relative,
While ensureing sealing effect, the static sealing that can be used under ultralow-temperature operation conditions and it is slidingly sealed and is used for ultralow temperature work
Dynamic sealing under condition.
Further, above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic sealing, the supporting item are low temperature resistant
Annular rod or ring pipe, the material diameter of annular rod or ring pipe are less than the bore of pipe made of material.This design structure
Simply, processing cost is low；Annular rod or ring pipe can provide support force protection pipe, and can gentle with pipe, comprehensively be bonded,
Its support effect is good；And do not influence the pliability and sealing performance of pipe.
Further, above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic sealing, the supporting item are metal foil
The spring ring that piece spiral winding forms, or be the metal light wall pipe equipped with opening, spring ring or the metal light wall pipe is in a ring.This
Supporting piece structure stabilization, the service life length of kind design, there is provided stable support force protection pipe；After high-pressure fluid enters pipe, energy
The hollow cavity of pipe is rapidly filled with, sealing speed is fast, effect is good.
Further, above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic sealing, the pipe are equipped with annular in shape
Bearing, the bearing are connected with the exterior mounting surface for installing annular seal of tube circle.The installation of this design sealing ring is stable, can
Lean on, sealing ring is not easy to tilt, shifted.
Further, above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic sealing, one group of air inlet hole number
No less than 2, and circular array shape is distributed.Sealing ring is in installation and in use, air admission hole faces that of high-pressure fluid
Side sets and is uniformly distributed so that intake process is stable, quick, uniform, and air inlet effect is good.
The processing method of above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic sealing, using 3D printing technique one
Secondary shaping, either uses welding technique to bond the docking of supporting item both ends, the docking of pipe both ends to realize welding fabrication or use
Technology docks supporting item both ends, pipe both ends are docked to realize molding bonded.
Further, the processing method of above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic sealing, step is such as
Under：1）Pipe is obtained in a manner of extrusion molding；2）Punching forms one group of air admission hole on pipe；3）Cut, pipe is cut into setting
Length；4）By the pipe cut movement and it is set on supporting item；5）Pipe is inconjunction with supporting item and is put into togerther sealing ring pair
Connect in the annular groove of mould, mold；6）Supporting item both ends are connected using welding procedure or bonding process；7）Use welding procedure
Or bonding process connects pipe both ends.This process steps are simple, reduce processing cost.
Further, the processing method of above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic sealing, the pipe
（2）The welding procedure of both ends connection melts welding for electromagnetism, and either laser melts welding or infrared thawing welding.It is this to set
Meter can ensure the precision and intensity of pipe weld, not influence the sealing performance of pipe.
Further, the processing method of above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic sealing, the sealing
Circle docking mould includes upper die and lower die and mobile mould, its intermediate annular groove includes the half slot for being separately positioned on upper die and lower die, with
And the tubular housing inside mobile mould is arranged on, welder is arranged on mobile mould；Pipe is inconjunction with supporting item to be put into togerther
Sealing ring docking mould comprises the following steps that：1）Pipe is inconjunction with supporting item to bend and be put into the half slot of lower die together,
Upper die and lower die are molded；2）The both ends of pipe and supporting item are respectively put into the both ends of mobile mould；3）Mobile mould movement, and with it is upper
The overall molding of mould, lower die.This design can docking in place, ensures its docking essence well by the both ends of pipe and supporting item
Degree.
Above-mentioned technical proposal can be seen that the present invention and have the advantages that：It is of the present invention a kind of for ultralow
The ring pipe sealing ring of warm dynamic sealing, the sealing ring of this design can be used for the static sealing under ultralow-temperature operation conditions and slip
Sealing, and the dynamic sealing that can be used under ultralow-temperature operation conditions；When inner cavity does not have Fluid pressure, there is stable support force support thin-walled
Pipe, prevents pipe conquassation, failure；When high-pressure fluid, which enters tube cavity, produces pressure difference, the Guan Nengyu metal surfaces of thin-walled are close
Fitting, has good sealing effect；It is whole when high-pressure fluid, which enters pipe, produces pressure difference and two seal face relative separations
Body pipe has enough intensity to bear pressure difference alone, will not break, bursts, fail；Its stable structure, service life length, sealing speed
Degree is fast, effect is good；Process steps are simple, reduce processing cost, improve the precision and intensity of pipe weld.
Brief description of the drawings
Fig. 1 is a kind of structure chart of the ultralow temperature sealing ring of half opening built-in metal spring ring in the prior art；
Fig. 2 is of the present invention a kind of for the first embodiment of the ring pipe sealing ring of ultralow temperature dynamic sealing
Structure chart；
Fig. 3 is the sectional structure chart of A-A in Fig. 2；
Fig. 4 is the detailed structure view in B portions in Fig. 3；
Fig. 5 is a kind of second of embodiment of ring pipe sealing ring for ultralow temperature dynamic sealing of the present invention
Sectional structure chart；
Fig. 6 is the detailed structure view in C portions in Fig. 5；
Fig. 7 is of the present invention a kind of for the third embodiment of the ring pipe sealing ring of ultralow temperature dynamic sealing
Sectional structure chart；
Fig. 8 is the detailed structure view in D portions in Fig. 7；
Fig. 9 is a kind of the 4th kind of embodiment of ring pipe sealing ring for ultralow temperature dynamic sealing of the present invention
Sectional structure chart；
Figure 10 is the detailed structure view in E portions in Fig. 9；
Figure 11 is the structure chart that a kind of sealing ring of the present invention docks mould；
In figure：1- hollow cavities, 2- are managed, 3- air admission holes, 4- supporting items, 5- bearings, 6- sealing rings docking mould, on 61-
Mould, 62- lower dies, 63- movement moulds, 7- welders, 101- outer rings, 102- metal spring inner rings, 103- lips.
Embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the invention is described in detail.
Embodiment 1
A kind of the first embodiment of ring pipe sealing ring for ultralow temperature dynamic sealing of the present invention, such as Fig. 2 extremely
Shown in Fig. 4, including the pipe 2 equipped with hollow cavity 1, and one group of air admission hole 3 being arranged on pipe 2, the pipe 2 in a ring, and
And it is equipped with supporting item 4 in its hollow cavity 1；Supporting item 4 annular rod, material diameter of annular rod made of low temperature material is small
In the bore of pipe 2；Pipe 2 is equipped with bearing 5 annular in shape, and bearing 5 is connected with the exterior mounting surface for installing annular seal of tube circle,
Bearing 5 is arranged on the inner ring surface of pipe 2；One group of 3 quantity of air admission hole is no less than 2, and circular array shape is distributed, it is according to height
The direction of pressure fluid is arranged on side or the outer ring surface of pipe 2；Pipe 2 is made using PTFE or PCTFE or its derivative modified material.
A kind of processing method of ring pipe sealing ring for ultralow temperature dynamic sealing of the present invention, step are as follows：
1）Pipe 2 is obtained in a manner of extrusion molding；
2）Punching forms one group of air admission hole 3 on pipe 2；
3）Cut, pipe 2 is cut into the length of setting；
4）The pipe 2 cut is moved and is arranged on the support 4；
5）Pipe 2 is inconjunction with supporting item 4 to be put into togerther in the annular groove of sealing ring docking mould 6；As shown in figure 11, it is described
Sealing ring docking mould 6 includes upper mold 61, lower die 62 and mobile mould 63, its intermediate annular groove includes being separately positioned on upper mold 61 with
The half slot of mould 62, and the tubular housing inside mobile mould 63 is arranged on, adhering device is arranged on mobile mould 63；By pipe 2
It is inconjunction with supporting item 4 and is put into togerther comprising the following steps that for sealing ring docking mould 6：
a）Pipe 2 is inconjunction with supporting item 4 to bend and be put into the half slot of lower die 62 together, upper mold 61 and lower die 62 are closed
Mould；
b）The both ends of pipe 2 and supporting item 4 are respectively put into the both ends of mobile mould 63；
c）Mobile mould 63 moves, and is molded with upper mold 61, the overall of lower die 62；
6）4 both ends of supporting item are connected using bonding process；
7）2 both ends of pipe are connected using bonding process.
Embodiment 2
The present invention a kind of ring pipe sealing ring for ultralow temperature dynamic sealing second of embodiment, as Fig. 5 with
Shown in Fig. 6, including the pipe 2 equipped with hollow cavity 1, and one group of air admission hole 3 being arranged on pipe 2, the pipe 2 in a ring, and
And it is equipped with supporting item 4 in its hollow cavity 1；Supporting item 4 is annular brace pipe made of low temperature material, the material of annular brace pipe
Expect that diameter is less than the bore of pipe 2, the pipe 2 is pipe, and material diameter（The outside diameter of pipe cross section）For 60mm, ring pipe
The outside diameter of sealing ring is 2m, and the unilateral gap between annular brace Guan Yuguan 2 is 5.5mm；Pipe 2 is equipped with bearing 5 annular in shape, institute
State bearing 5 with the exterior mounting surface for installing annular seal of tube circle to be connected, bearing 5 is arranged on the side of pipe 2；One group of air inlet
3 quantity of hole is no less than 2, and circular array shape is distributed, it is arranged on another side of pipe 2 according to the direction of high-pressure fluid
Or outer ring surface or inner ring surface.
The processing method of a kind of ring pipe sealing ring for ultralow temperature dynamic sealing of the present invention, using 3D printing technique
One-pass molding.
Embodiment 3
The present invention a kind of ring pipe sealing ring for ultralow temperature dynamic sealing the third embodiment, as Fig. 7 with
Shown in Fig. 8, including the pipe 2 equipped with hollow cavity 1, and one group of air admission hole 3 being arranged on pipe 2, the pipe 2 in a ring, and
And supporting item 4 is equipped with its hollow cavity 1, supporting item 4 is the spring ring in a ring that sheet metal spiral winding forms；It is described
Pipe 2 is pipe, and material diameter（The outside diameter of pipe cross section）For 4mm, the outside diameter of ring pipe sealing ring is 6mm, spring ring with
Unilateral gap between pipe 2 is 0.05mm；Pipe 2 is equipped with bearing 5 annular in shape, the bearing 5 and the annular seal of tube of exterior installation
The mounting surface of circle is connected, and bearing 5 is arranged on the outer ring surface of pipe 2；One group of air admission hole, 3 quantity is no less than 2, and is in ring
Shape array-like is distributed, it is arranged on side or the inner ring surface of pipe 2 according to the direction of high-pressure fluid.
A kind of processing method of ring pipe sealing ring for ultralow temperature dynamic sealing of the present invention, step are as follows：
1）Pipe 2 is obtained in a manner of extrusion molding；
2）Punching forms one group of air admission hole 3 on pipe 2；
3）Cut, pipe 2 is cut into the length of setting；
4）The pipe 2 cut is moved and is arranged on the support 4；
5）Pipe 2 is inconjunction with supporting item 4 to be put into togerther in the annular groove of sealing ring docking mould 6；As shown in figure 11, it is described
Sealing ring docking mould 6 includes upper mold 61, lower die 62 and mobile mould 63, its intermediate annular groove includes being separately positioned on upper mold 61 with
The half slot of mould 62, and the tubular housing inside mobile mould 63 is arranged on, welder 7 is arranged on mobile mould 63；By pipe 2
It is inconjunction with supporting item 4 and is put into togerther comprising the following steps that for sealing ring docking mould 6：
a）Pipe 2 is inconjunction with supporting item 4 to bend and be put into the half slot of lower die 62 together, upper mold 61 and lower die 62 are closed
Mould；
b）The both ends of pipe 2 and supporting item 4 are respectively put into the both ends of mobile mould 63；
c）Mobile mould 63 moves, and is molded with upper mold 61, the overall of lower die 62；
6）4 both ends of supporting item are connected using welding procedure；
7）2 both ends of pipe are connected using welding procedure, wherein welding procedure melts welding for electromagnetism, or laser melts weldering
Connect, or infrared thawing welding.
Embodiment 4
The present invention a kind of ring pipe sealing ring for ultralow temperature dynamic sealing the 4th kind of embodiment, as Fig. 9 with
Shown in Figure 10, including the pipe 2 equipped with hollow cavity 1, and one group of air admission hole 3 being arranged on pipe 2, the pipe 2 in a ring, and
And it is equipped with supporting item 4 in its hollow cavity 1；Supporting item 4 is the metal light wall pipe in a ring equipped with opening；One group of air admission hole
3 quantity are no less than 2, and circular array shape is distributed, it is arranged on side or the inner ring of pipe 2 according to the direction of high-pressure fluid
Face or outer ring surface.
The above is only the preferred embodiment of the present invention, it should be noted that for those skilled in the art
For, without departing from the principle of the present invention, some improvement can also be made, these improvement also should be regarded as the guarantor of the present invention
Protect scope.
Claims (7)
- A kind of 1. processing method of ring pipe sealing ring for ultralow temperature dynamic sealing, it is characterised in that：Ring pipe sealing ring Including equipped with hollow cavity（1）Pipe（2）, and it is arranged on pipe（2）On one group of air admission hole（3）, the pipe（2）In a ring, And its hollow cavity（1）It is interior to be equipped with supporting item（4）, the processing method of the ring pipe sealing ring comprises the following steps：1）Pipe is obtained in a manner of extrusion molding（2）；2）In pipe（2）Upper punching forms one group of air admission hole（3）；3）Cut, will manage（2）Cut into the length of setting；4）The pipe that will have been cut（2）Move and be set in supporting item（4）On；5）Will pipe（2）It is inconjunction with supporting item（4）It is put into togerther sealing ring docking mould（6）Annular groove in, molding；6）Using welding procedure or bonding process by supporting item（4）Both ends connect；7）It will be managed using welding procedure or bonding process（2）Both ends connect.
- 2. a kind of processing method of ring pipe sealing ring for ultralow temperature dynamic sealing according to claim 1, it is special Sign is：The pipe（2）The welding procedure of both ends connection melts welding for electromagnetism, and either laser melts welding or infrared melts Change welding.
- 3. a kind of processing method of ring pipe sealing ring for ultralow temperature dynamic sealing according to claim 1, it is special Sign is：The sealing ring docks mould（6）Including upper mold（61）, lower die（62）With mobile mould（63）, its intermediate annular groove includes It is separately positioned on upper mold（61）And lower die（62）Half slot, and be arranged on mobile mould（63）Internal tubular housing, welding Device（7）It is arranged on mobile mould（63）On；Will pipe（2）It is inconjunction with supporting item（4）It is put into togerther sealing ring docking mould（6）Tool Body step is as follows：1）Will pipe（2）It is inconjunction with supporting item（4）Bend together and be put into lower die（62）Half slot in, by upper mold（61）And lower die （62）Molding；2）Will pipe（2）And supporting item（4）Both ends be respectively put into mobile mould（63）Both ends；3）Mobile mould（63）It is mobile, and and upper mold（61）, lower die（62）Overall molding.
- 4. a kind of processing method of ring pipe sealing ring for ultralow temperature dynamic sealing according to claim 1, it is special Sign is：The supporting item（4）For annular rod or ring pipe, the material diameter of annular rod or ring pipe made of low temperature material Less than pipe（2）Bore.
- 5. a kind of processing method of ring pipe sealing ring for ultralow temperature dynamic sealing according to claim 1, it is special Sign is：The supporting item（4）The spring ring formed for sheet metal spiral winding, or be the metal light wall pipe equipped with opening, Spring ring or the metal light wall pipe is in a ring.
- 6. a kind of processing method of ring pipe sealing ring for ultralow temperature dynamic sealing according to claim 1, it is special Sign is：The pipe（2）Equipped with bearing annular in shape（5）, the bearing（5）With the exterior installation for installing annular seal of tube circle Face is connected.
- 7. a kind of processing method of ring pipe sealing ring for ultralow temperature dynamic sealing according to claim 1, it is special Sign is：One group of air admission hole（3）Quantity is no less than 2, and circular array shape is distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610709967.6A CN106439013B (en) | 2016-08-24 | 2016-08-24 | A kind of ring pipe sealing ring and its processing method for ultralow temperature dynamic sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610709967.6A CN106439013B (en) | 2016-08-24 | 2016-08-24 | A kind of ring pipe sealing ring and its processing method for ultralow temperature dynamic sealing |
Publications (2)
| Publication Number | Publication Date |
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| CN106439013A CN106439013A (en) | 2017-02-22 |
| CN106439013B true CN106439013B (en) | 2018-05-04 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798360A (en) * | 2019-01-08 | 2019-05-24 | 苏州中宝复合材料股份有限公司 | A kind of large-scale low-temperature sealing element and its manufacturing method |
| CN115163831A (en) * | 2022-07-03 | 2022-10-11 | 国镓芯科(深圳)半导体科技有限公司 | Reaction kettle seal for growing gallium nitride by ammonothermal method and manufacturing method |
| CN118602054A (en) * | 2024-08-07 | 2024-09-06 | 万向钱潮股份公司 | Self-tightening sealing ring, sealing structure and air spring |
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| CN1066107A (en) * | 1991-04-26 | 1992-11-11 | 刘基农 | Gas-filled type rubber seal and sealing configuration thereof |
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| JP2002089724A (en) * | 2000-09-12 | 2002-03-27 | Kitz Corp | Sealing member and valve using it |
| EP2213915B1 (en) * | 2007-11-20 | 2018-05-23 | Eagle Industry Co., Ltd. | Mechanical seal and tandem seal |
| CN202012686U (en) * | 2011-03-09 | 2011-10-19 | 唐山唐钢气体有限公司 | Air-discharging quick-mounting device for low-temperature liquid tank wagon |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1066107A (en) * | 1991-04-26 | 1992-11-11 | 刘基农 | Gas-filled type rubber seal and sealing configuration thereof |
| CN2784675Y (en) * | 2005-07-13 | 2006-05-31 | 王蕾 | Sealing device for ship model shafting |
| CN102168757A (en) * | 2011-02-01 | 2011-08-31 | 宁波天生密封件有限公司 | C-shaped cladding sealing ring of built-in spring and manufacturing method thereof |
| CN202280842U (en) * | 2011-11-01 | 2012-06-20 | 南车二七车辆有限公司 | Sealing ring having square cross section |
| CN104019239A (en) * | 2014-06-25 | 2014-09-03 | 北京市城南橡塑技术研究所 | Air inflation sealing device for rod-shaped part |
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|---|---|
| CN106439013A (en) | 2017-02-22 |
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