CN106439013A - Annular pipe sealing ring used for ultralow-temperature dynamic sealing and machining method thereof - Google Patents
Annular pipe sealing ring used for ultralow-temperature dynamic sealing and machining method thereof Download PDFInfo
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- CN106439013A CN106439013A CN201610709967.6A CN201610709967A CN106439013A CN 106439013 A CN106439013 A CN 106439013A CN 201610709967 A CN201610709967 A CN 201610709967A CN 106439013 A CN106439013 A CN 106439013A
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- pipe
- sealing ring
- ring
- support member
- sealing
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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 an annular pipe sealing ring used for ultralow-temperature dynamic sealing. The annular pipe sealing ring comprises a pipe and a group of air inlet holes, wherein the pipe is provided with a hollow cavity, and the air inlet holes are formed in the pipe. The pipe is annular, and the hollow cavity of the pipe is internally provided with a supporting piece. The sealing ring with the design can be made of a relatively flexible low-temperature-resistant material, and the sealing effect is ensured; meanwhile, the annular pipe sealing ring not only can be used for static sealing and sliding sealing under an ultralow-temperature working condition but also can be used for dynamic sealing under the ultralow-temperature working condition; when no fluid pressure exists in the inner cavity, the thin-wall pipe is supported through stable supporting force provided by the supporting piece inside the inner cavity, and crushing and failure of the pipe are prevented; when high-pressure fluid enters the inner cavity of the pipe and the pressure difference is produced, the thin-wall pipe has enough deformation capability, can be closely attached to the metal surface and is good in sealing effect; and in addition, when the two sealing end surfaces are relatively separated, the sealing ring has enough strength to bear the pressure difference alone, and breaking caused by pulling, bursting and failure are avoided.
Description
Technical field
The present invention relates to the technical field of the sealing of very low temperature flow, particularly to a kind of for ultralow temperature dynamic seal (packing)
Ring pipe sealing ring.
Background technology
Ultralow temperature sealing ring is mainly used in very low temperature flow, the sealing of such as LNG, liquid hydrogen, liquid oxygen and liquid nitrogen etc., Ke Yiyong
In the sealing of LNG automobile, the extremely low temperature tank of steamer and filler, rocket, the liquid fuel storage tank of space shuttle and cartridge
The sealing on road, and other need use ultralow temperature seal occasion.
Market existing ultralow temperature sealing ring, the most conventional is O RunddichtringO, this sealing ring disadvantageously, seal
The sealing ring that the good material of effect, such as fluorubber, nitrile rubber or silica gel material are made, all cannot resistance to ultralow temperature, its
Elasticity under ultralow-temperature operation conditions and mechanical mechanics property significantly decay, and easily damage and lose efficacy；And it is current international conventional low temperature resistant
Material, mainly PTFE and PCTFE and derivative material modified, these materials stable mechanical property under ultralow-temperature operation conditions,
But comparing with rubber and silica gel, its poor flexibility, hardness are high, be not enough to produce enough deformation and realize close after stress
Envelope.
In order to overcome the problems referred to above, abroad occur in that the ultralow temperature sealing ring of a kind of half opening built-in metal turn, as
Shown in Fig. 1, including the outer ring 101 of the half opening that material is the low-temperature resistant plastics such as PTFE or PCTFE and sheet metal be wound around and
The metal spring inner ring 102 becoming.This structure utilizes metal spring inner ring 102 to provide stable support under ultralow-temperature operation conditions
Power, protects outer ring 101, prevents outer ring 101 from after being pressed, destructive deformation occurring；Utilize relatively thin outer ring 101 relatively soft simultaneously
Feature soft, that be easily deformed, when open side, to have gases at high pressure or liquid to enter fashionable, utilizes pressure reduction, outer ring 101 is strutted, makes
Outer ring 101 tightly press against on sealing surface, substantially increase sealing property.
But the ultralow temperature sealing ring of this half opening built-in metal turn suffers from the drawback that：It is primarily adapted for use in static state
Sealing and slipper seal, it may not apply to dynamic seal (packing).During because two seal faces separate in opposite directions, opening cavity pressure
More than the pressure sealing the back side, two lips 103 of outer ring 101 can by pressure tightly be fitted in seal face, with sealed end
The separation in opposite directions in face, two lips 103 of outer ring 101 are burst, are torn, and cause sealing ring to lose efficacy.
Above-mentioned slipper seal refers to that two sealing surfaces do the parallel or similar sealing moving in parallel, once graininess relatively
Dust or other foreign matters enter the cooperation face of sealing, can cause permanent scratch to sealing surface, thus lead during slipper seal
Cause serious leakage failure, cause potential safety hazard；Above-mentioned dynamic seal (packing) refers to the sealing that two seal faces separate in opposite directions, by
Relatively do not slide between sealing surface, it is to avoid foreign matter is to the scuffing of sealing surface and abrasion.
Content of the invention
The purpose of invention：The present invention discloses a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing), this design
Sealing ring can be made by the low temperature material of relative flexibility, can be used for the static sealing under ultralow-temperature operation conditions and slipper seal,
The dynamic seal (packing) under ultralow-temperature operation conditions can be used for again；When inner chamber does not has fluid pressure, internal support is relied on to provide stable propping up
Support force supports the pipe of thin-walled, prevents pipe conquassation, inefficacy；When high-pressure fluid enters tube cavity generation pressure reduction, the pipe of thin-walled has foot
Enough deformabilities, can fit tightly with metal surface, good sealing effect；And it is when two seal face relative separation, close
Seal has enough intensity to bear alone pressure reduction, will not break, bursts, lose efficacy.
Technical scheme：In order to realize object above, the invention discloses a kind of ring pipe for ultralow temperature dynamic seal (packing)
Sealing ring, including be provided with the pipe of hollow cavity, and the one group of air admission hole being arranged on pipe, described pipe ringwise, and wherein
It is provided with support member in cavity body.When inner chamber does not has fluid pressure, support member provides stable support force, supports the pipe of thin-walled, anti-
Only pipe conquassation, inefficacy；When high-pressure fluid enters tube cavity generation pressure reduction, the pipe of thin-walled is more soft, and it has enough deformation
Ability, can fit closely with metal surface, has good sealing effectiveness；Though sealing ring has air admission hole, but it is still one
Individual overall pipe, when high-pressure fluid enters pipe generation pressure reduction and two seal face relative separation, integral tube has enough
Intensity bears alone pressure reduction, will not burst, lose efficacy；The sealing ring of this design can be made by the low temperature material of flexible relative,
While ensureing sealing effectiveness, the static sealing under ultralow-temperature operation conditions and slipper seal can be used for, ultralow temperature work can be used for again
Dynamic seal (packing) under condition.
Further, above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing), described support member is low temperature resistant
The annular excellent or ring pipe that material is made, the material diameter of annular rod or ring pipe is less than the bore of pipe.This design structure
Simply, processing cost is low；Annular rod or ring pipe can provide support force protection pipe, and can mild with pipe, comprehensively fit,
Its support effect is good；And do not affect pliability and the sealing property of pipe.
Further, above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing), described support member is metal foil
The turn of piece spiral winding, or be the metal light wall pipe being provided with opening, described turn or metal light wall pipe are ringwise.This
The supporting piece structure of kind of design is stable, service life is long, provides stable support force protection pipe；After high-pressure fluid enters pipe, energy
Being rapidly filled with the hollow cavity of pipe, speed is fast, effect good in sealing.
Further, above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing), described pipe is provided with in the form of a ring
Bearing, the installed surface that described bearing installs annular seal of tube circle with outside is connected.The installation of this design sealing ring is stable, can
Lean on, make sealing ring be difficult to, shift.
Further, above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing), described one group of air admission hole quantity
No less than 2, and the distribution of circular array shape.Sealing ring is when installing and use, and air admission hole faces that of high-pressure fluid
Side arranges 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 seal (packing), uses 3D printing technique one
Secondary shaping, or use solder technology to dock to realize welding fabrication by the docking of support member two ends, pipe two ends, or use bonding
Support member two ends are docked by technology, pipe two 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 seal (packing), step is such as
Under：1）Managed in the way of extrusion molding；2）Punching on pipe forms one group of air admission hole；3）Cut, pipe is cut into setting
Length；4）The pipe cutting is moved and is set on support member；5）Pipe is inconjunction with support member and puts into sealing ring pair together
Connect in the cannelure of mould, matched moulds；6）Welding procedure or bonding process is used to connect support member two ends；7）Use welding procedure
Or pipe two ends are connected by bonding process.This process steps is simple, reduces processing cost.
Further, the processing method of above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing), described pipe
（2）The welding procedure that two ends connect is that electromagnetism melts welding, or laser melts welding, or infrared thawing welding.This set
Meter can ensure that precision and the intensity of pipe weld, does not affect the sealing property of pipe.
Further, the processing method of above-mentioned a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing), described sealing
Circle docking mould includes upper die and lower die and mobile mould, and its intermediate annular groove includes the half slot being separately positioned on upper die and lower die, with
And it is arranged on tubular housing within mobile mould, welder is arranged on mobile mould；Pipe is inconjunction with support member put into together
Comprising the following steps that of sealing ring docking mould：1）Pipe is inconjunction with support member bend together and put in the half slot of lower mold,
By upper die and lower die matched moulds；2）The two ends of pipe and support member are respectively put into the two ends of mobile mould；3）Mobile mould moves, and with upper
Mould, the overall matched moulds of lower mold.The two ends of pipe and support member can well be docked and be put in place by this design, it is ensured that it docks essence
Degree.
Technique scheme is it can be seen that the present invention has the advantages that：One of the present invention is used for ultralow
The ring pipe sealing ring of temperature dynamic seal (packing), the sealing ring of this design can be used for static sealing and slip under ultralow-temperature operation conditions
Seal, the dynamic seal (packing) under ultralow-temperature operation conditions can be used for again；When inner chamber does not has fluid pressure, stable support force is had to support thin-walled
Pipe, prevents pipe conquassation, inefficacy；When high-pressure fluid enters tube cavity generation pressure reduction, the Guan Nengyu metal surface of thin-walled is close
Laminating, has good sealing effectiveness；When high-pressure fluid enters pipe generation pressure reduction and two seal face relative separation, whole
Body pipe has enough intensity to bear alone pressure reduction, will not break, bursts, lose efficacy；Its Stability Analysis of Structures, service life are long, seal speed
Degree is fast, effect is good；Process steps is simple, reduces processing cost, improves precision and the intensity of pipe weld.
Brief description
Fig. 1 is the structure chart of the ultralow temperature sealing ring of a kind of half opening built-in metal turn in prior art；
Fig. 2 is the structure of a kind of ring pipe the first embodiment of sealing ring for ultralow temperature dynamic seal (packing) of the present invention
Figure；
Fig. 3 is the sectional structure chart of A-A in Fig. 2；
Fig. 4 is the detailed structure view in B portion in Fig. 3；
Fig. 5 is the section of a kind of ring pipe sealing ring the second embodiment for ultralow temperature dynamic seal (packing) of the present invention
Structure chart；
Fig. 6 is the detailed structure view in C portion in Fig. 5；
Fig. 7 is the section of a kind of ring pipe the third embodiment of sealing ring for ultralow temperature dynamic seal (packing) of the present invention
Structure chart；
Fig. 8 is the detailed structure view in D portion in Fig. 7；
Fig. 9 is the section of a kind of the 4th kind of embodiment of ring pipe sealing ring for ultralow temperature dynamic seal (packing) of the present invention
Structure chart；
Figure 10 is the detailed structure view in E portion in Fig. 9；
Figure 11 is the structure chart of a kind of sealing ring of the present invention docking mould；
In figure：1-hollow cavity, 2-manages, 3-air admission hole, 4-support member, 5-bearing, 6-sealing ring docking mould, 61-upper mold,
62-lower mold, 63-moves mould, 7-welder, 101-outer ring, 102-metal spring inner ring, 103-lip.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the specific embodiment of the invention is described in detail.
Embodiment 1
The first embodiment of a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) of the present invention, such as Fig. 2 to Fig. 4 institute
Show, including be provided with the pipe 2 of hollow cavity 1, and the one group of air admission hole 3 being arranged on pipe 2, described pipe 2 ringwise, and wherein
It is provided with support member 4 in cavity body 1；The annular rod that support member 4 is made for low temperature material, the material diameter of annular rod is less than pipe 2
Bore；Pipe 2 is provided with bearing 5 in the form of a ring, and the installed surface that bearing 5 installs annular seal of tube circle with outside is connected, bearing 5
It is arranged on the inner ring surface of pipe 2；One group of air admission hole 3 quantity is no less than 2, and the distribution of circular array shape, and it is according to high-pressure spray
The direction of body is arranged on side or the outer ring surface of pipe 2；Pipe 2 use PTFE or PCTFE or its derivative material modified make.
The processing method of a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) of the present invention, step is as follows：
1）Obtain pipe 2 in the way of extrusion molding；
2）Punching on pipe 2 forms one group of air admission hole 3；
3）Cut, pipe 2 is cut into the length of setting；
4）The pipe 2 cutting is moved and sheathed on the support 4；
5）Pipe 2 is inconjunction with in the cannelure that support member 4 puts into sealing ring docking mould 6 together；As shown in figure 11, described sealing
Circle docking mould 6 includes upper mold the 61st, lower mold 62 and mobile mould 63, and its intermediate annular groove includes being separately positioned on upper mold 61 and lower mold 62
Half slot, and be arranged on the tubular housing within mobile mould 63, adhering device is arranged on mobile mould 63；By related for pipe 2
Support member 4 and put into comprising the following steps that of sealing ring docking mould 6 together：
a）Pipe 2 is inconjunction with support member 4 bend together and put in the half slot of lower mold 62, by upper mold 61 and lower mold 62 matched moulds；
b）The two ends of pipe 2 and support member 4 are respectively put into the two ends of mobile mould 63；
c）Mobile mould 63 moves, and the overall matched moulds with upper mold the 61st, lower mold 62；
6）Bonding process is used to connect support member 4 two ends；
7）Bonding process is used to connect pipe 2 two ends.
Embodiment 2
The second embodiment of a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) of the present invention, such as Fig. 5 and Fig. 6 institute
Show, including be provided with the pipe 2 of hollow cavity 1, and the one group of air admission hole 3 being arranged on pipe 2, described pipe 2 ringwise, and wherein
It is provided with support member 4 in cavity body 1；The annular brace pipe that support member 4 is made for low temperature material, the material diameter of annular brace pipe
Less than the bore of pipe 2, described pipe 2 is pipe, and material diameter（The external diameter of pipe cross section）For 60mm, ring pipe sealing ring
External diameter be 2m, the unilateral gap between annular brace tube and tube 2 is 5.5mm；Pipe 2 is provided with bearing 5 in the form of a ring, described bearing
5 are connected with the installed surface of outside installation annular seal of tube circle, and bearing 5 is arranged on the side of pipe 2；Described one group of air admission hole 3 number
Amount is no less than 2, and the distribution of circular array shape, and it is arranged on another side of pipe 2 or outer according to the direction of high-pressure fluid
Anchor ring or inner ring surface.
The processing method of a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) of the present invention, uses 3D printing technique
One-shot forming.
Embodiment 3
The third embodiment of a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) of the present invention, such as Fig. 7 and Fig. 8 institute
Show, including be provided with the pipe 2 of hollow cavity 1, and the one group of air admission hole 3 being arranged on pipe 2, described pipe 2 ringwise, and wherein
It is provided with support member 4, the turn ringwise that support member 4 is sheet metal spiral winding in cavity body 1；Described pipe 2 is
Pipe, and material diameter（The external diameter of pipe cross section）For 4mm, the external diameter of ring pipe sealing ring is 6mm, turn and pipe 2 it
Between unilateral gap be 0.05mm；Pipe 2 is provided with bearing 5 in the form of a ring, described bearing 5 and outside installation annular seal of tube circle
Installed surface is connected, and bearing 5 is arranged on the outer ring surface of pipe 2；Described one group of air admission hole 3 quantity is no less than 2, and circular array
Shape is distributed, and it is arranged on side or the inner ring surface of pipe 2 according to the direction of high-pressure fluid.
The processing method of a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) of the present invention, step is as follows：
1）Obtain pipe 2 in the way of extrusion molding；
2）Punching on pipe 2 forms one group of air admission hole 3；
3）Cut, pipe 2 is cut into the length of setting；
4）The pipe 2 cutting is moved and sheathed on the support 4；
5）Pipe 2 is inconjunction with in the cannelure that support member 4 puts into sealing ring docking mould 6 together；As shown in figure 11, described sealing
Circle docking mould 6 includes upper mold the 61st, lower mold 62 and mobile mould 63, and its intermediate annular groove includes being separately positioned on upper mold 61 and lower mold 62
Half slot, and be arranged on the tubular housing within mobile mould 63, welder 7 is arranged on mobile mould 63；By related for pipe 2
Support member 4 and put into comprising the following steps that of sealing ring docking mould 6 together：
a）Pipe 2 is inconjunction with support member 4 bend together and put in the half slot of lower mold 62, by upper mold 61 and lower mold 62 matched moulds；
b）The two ends of pipe 2 and support member 4 are respectively put into the two ends of mobile mould 63；
c）Mobile mould 63 moves, and the overall matched moulds with upper mold the 61st, lower mold 62；
6）Welding procedure is used to connect support member 4 two ends；
7）Using welding procedure to connect pipe 2 two ends, wherein welding procedure is that electromagnetism melts welding, or laser melts welding,
Or infrared thawing is welded.
Embodiment 4
4th kind of embodiment of a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) of the present invention, such as Fig. 9 and Figure 10
Shown in, including be provided with the pipe 2 of hollow cavity 1, and the one group of air admission hole 3 being arranged on pipe 2, described pipe 2 ringwise, and its
It is provided with support member 4 in hollow cavity 1；Support member 4 is the metal light wall pipe ringwise being provided with opening；Described one group of air admission hole 3 number
Amount is no less than 2, and the distribution of circular array shape, and it is arranged on side or the inner ring surface of pipe 2 according to the direction of high-pressure fluid
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, under the premise without departing from the principles of the invention, some improvement can also be made, these improve the guarantor that also should be regarded as the present invention
Protect scope.
Claims (9)
1. the ring pipe sealing ring for ultralow temperature dynamic seal (packing), it is characterised in that：Including：It is provided with hollow cavity（1）'s
Pipe（2）, and it is arranged on pipe（2）On one group of air admission hole（3）, described pipe（2）Ringwise, and its hollow cavity（1）Inside set
There is support member（4）.
2. a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) according to claim 1, it is characterised in that：Described
Support member（4）The annular rod made for low temperature material or ring pipe, the material diameter of annular rod or ring pipe is less than pipe（2）'s
Bore.
3. a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) according to claim 1, it is characterised in that：Described
Support member（4）For the turn of sheet metal spiral winding, or be the metal light wall pipe being provided with opening, described turn or
Metal light wall pipe is ringwise.
4. a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) according to claim 1, it is characterised in that：Described
Pipe（2）It is provided with bearing in the form of a ring（5）, described bearing（5）The installed surface installing annular seal of tube circle with outside is connected.
5. a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) according to claim 1, it is characterised in that：Described
One group of air admission hole（3）Quantity is no less than 2, and the distribution of circular array shape.
6. the processing of a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) according to claim 1-5 any one
Method, it is characterised in that：Use 3D printing technique one-shot forming, or use solder technology by support member（4）Two ends docking, pipe
（2）Two ends dock to realize welding fabrication, or use bonding technology by support member（4）Two ends docking, pipe（2）Two ends docking with
Realize molding bonded.
7. the processing method of a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) according to claim 6, it is special
Levy and be：The step of described welding fabrication or molding bonded is as follows：
1）Managed in the way of extrusion molding（2）；
2）At pipe（2）Upper punching forms one group of air admission hole（3）；
3）Cut, will pipe（2）Cut into the length of setting；
4）The pipe that will cut（2）Move and be set in support member（4）On；
5）Will pipe（2）It is inconjunction with support member（4）Put into sealing ring docking mould together（6）Cannelure in, matched moulds；
6）Use welding procedure or bonding process by support member（4）Two ends connect；
7）Welding procedure or bonding process is used to manage（2）Two ends connect.
8. the processing method of a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) according to claim 7, it is special
Levy and be：Described pipe（2）The welding procedure that two ends connect is that electromagnetism melts welding, or laser melts welding, or infrared melts
Change welding.
9. the processing method of a kind of ring pipe sealing ring for ultralow temperature dynamic seal (packing) according to claim 7, it is special
Levy and be：Described sealing ring docks mould（6）Including upper mold（61）, lower mold（62）With mobile mould（63）, its intermediate annular groove includes
It is separately positioned on upper mold（61）And lower mold（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 support member（4）Put into sealing ring docking mould together（6）Tool
Body step is as follows：
1）Will pipe（2）It is inconjunction with support member（4）Bend together and put into lower mold（62）Half slot in, by upper mold（61）And lower mold
（62）Matched moulds；
2）Will pipe（2）And support member（4）Two ends be respectively put into mobile mould（63）Two ends；
3）Mobile mould（63）Mobile, and and upper mold（61）, lower mold（62）Overall matched moulds.
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 |
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| 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 |
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| CN106439013A true CN106439013A (en) | 2017-02-22 |
| CN106439013B CN106439013B (en) | 2018-05-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| 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 |
| CN206017714U (en) * | 2016-08-24 | 2017-03-15 | 苏州先创流体控制技术有限公司 | A kind of ultralow temperature ring pipe sealing ring |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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