CN106764180B - A kind of quick joint for metal pipes - Google Patents
A kind of quick joint for metal pipes Download PDFInfo
- Publication number
- CN106764180B CN106764180B CN201611268125.8A CN201611268125A CN106764180B CN 106764180 B CN106764180 B CN 106764180B CN 201611268125 A CN201611268125 A CN 201611268125A CN 106764180 B CN106764180 B CN 106764180B
- Authority
- CN
- China
- Prior art keywords
- grip
- stinging
- fixator
- wall
- lock chambers
- 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
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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/088—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a split elastic ring
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls or other movable or insertable locking members
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L37/00—Couplings of the quick-acting type
- F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
- F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
- F16L37/091—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of a ring provided with teeth or fingers
Abstract
The present invention relates to a kind of quick joint for metal pipes, the structure for stinging grip is improved, stinging grip is the ring-shaped article with opening, and the one end for stinging grip is provided with catching, the outer wall of the other end is provided with cyclic annular positioning seat, middle part inner wall is provided with latch, and flexible positioning piece, which is arranged in, stings between grip and limit fixator and be located at the outside for stinging grip, and the present invention has double locking mechanism, flexible positioning piece has abundant extendable room, with structurally reasonable, locking effect is good, reliable and stable feature.
Description
Technical field
The present invention relates to quick coupling, specifically a kind of quick joint for metal pipes.
Background technique
Notification number are as follows: 204358309 U of CN discloses a kind of locking type quick coupling, including is arranged in the fast quick access
The first sealing element and elastic device in head, further include being arranged between first sealing element and the elastic device
Second sealing element;The elastic device is waveform spring, is equipped with the bushing connecting with the second sealing element in quick coupling,
Holding set is provided in the bushing, the holding, which is put on, is provided with locking member;The elastic device is arranged in the bushing
And it covers and connects with the holding.
Current this structure latches are to lock metal tube by keeping set inner lock piece, and locking member coupling mechanism force is to pass through bullet
Property device provides, once coupling mechanism force deficiency metal tube leads to the problem of position and is likely to out leak, reliability is to be improved.
The content of present invention
The purpose of the present invention is to provide a kind of quick joint for metal pipes, improve to the structure for stinging grip, sting grip
For the ring-shaped article with opening, the one end for stinging grip is provided with catching, and the outer wall of the other end is provided with cyclic annular positioning seat, middle part inner wall
It is provided with latch, flexible positioning piece, which is arranged in, stings between grip and limit fixator and be located at the outside for stinging grip, present invention tool
There is a double locking mechanism, flexible positioning piece has abundant extendable room, has structurally reasonable, and locking effect is good, reliable and stable
Feature.
Following technical scheme is used to achieve the above object:
A kind of quick joint for metal pipes, including quick coupling ontology, quick coupling ontology include middle interconnecting piece and end,
It is characterized by: the end inwardly respectively includes lock chambers and seal chamber by port, pass through between lock chambers and seal chamber
Step structure transition, also by step structure transition between seal chamber and middle interconnecting piece, beam mouth, beam mouth is arranged in lock chambers port
Internal diameter is slightly larger than the outer diameter of pipeline, and sealing ring is arranged in the seal chamber;It is provided with limit fixator in the lock chambers, limits
It is provided on the inside of the fixator of position and stings grip, stung setting twice locking mechanism, the limit fixator inner wall in grip and be provided with
Make the inclined-plane for stinging grip tightening, described stinging is additionally provided with elastic positioner between grip and limit fixator, and elasticity is fixed
Position device, which is in, stings the outside of grip, and elastic positioner 4 is in the outside for stinging grip and keeps to stinging grip to port direction
Active force.
Described to sting the ring-shaped article that grip is band opening, the one end for stinging grip is provided with several catchings, the other end outside
Wall is provided with cyclic annular positioning seat, and the inner wall of middle part or the other end is provided with several latches.
The limit fixator includes external fixator and internal fixation device, and external fixator one end is contacted with beam mouth, the other end
Connect with internal fixation device, the other end of internal fixation device is against on the step between lock chambers and seal chamber, the external fixator
It is provided with outer inclined-plane on inner wall, outer inclined-plane is provided on internal fixation device inner wall, outer inclined-plane and cyclic annular positioning seat outer rim cooperate, interior oblique
Face and catching outer rim cooperate.
The elastic positioner is a spring, and spring one end is placed in cyclic annular positioning seat, and the other end withstands on interior fixation
On the end face of device.
It is additionally provided at the lock chambers port and unloads set, the one end extroversion for unloading set, which sells off to be formed, unloads end surfaces, described
The end surfaces that unload be placed in external fixator and matched with grip end face is stung.
The sealing ring side is stopped by the step between seal chamber and middle interconnecting piece, and the other side is hindered by catching
Gear.
Outer seal sleeve is socketed with outside the quick coupling ontology, the outer seal sleeve includes body and connection spiral shell
Set, the body include seal receptacle and connector sleeve, and sealing ring, internal diameter of the seal ring and outer diameter tube phase is arranged on the inside of seal receptacle
Match, described connector sleeve one end is linked together with seal receptacle, other end port be arranged with connect swivel nut connect interconnecting piece;It is described
Quick coupling end bosses outer diameter be greater than quick coupling in the middle part of outer diameter, step structure is formed between end and middle part, it is described
Connector sleeve end can integrally be wrapped up.
The connection swivel nut is composed of seperated rosette, and swivel nut internal diameter is connected after combination and is slightly larger than quick coupling
The external screw thread connecting with interconnecting piece is arranged in middle part outer diameter and the outer end diameter for being less than protrusion, connection swivel nut one end.
The seal receptacle includes external groove sidevall, internal groove side wall and accommodation groove, and the external groove sidevall height is in greater than internal groove side wall, institute
The sealing ring stated includes holding part, interior sealing and lateral seal portion, and holding part is placed in accommodation groove for fixed seal ring,
Interior sealing internal diameter matches with outer diameter tube, and internal groove side wall bead is wrapped up in the lateral seal portion.
What the present invention used band opening stings grip, stings catching in grip and latch under the action of the spring, cooperation is outer admittedly
The outer inclined-plane and outer inclined-plane for determining device and internal fixation device inner wall to sting grip automatic tightening thus by the quick coupling of acting pipe locking
It is interior, due to using catching and latch double locking, while the cyclic annular positioning seat of the outer wall setting fixed spring of grip end is stung, together
When limit fixator fission external fixator and internal fixation device, this setting is spring so that be located at the outside that spring stings grip
Elastic deformation provides sufficient space, so as to avoid the elastic component of existing quick coupling since limited space is easy to appear
Stuck problem, to greatly promote the reliability and stability of product, the present invention has structurally reasonable, and locking effect is good, can
By stable feature.
Detailed description of the invention
Fig. 1 is schematic diagram of internal structure of the invention;
Fig. 2 is the schematic perspective view that the present invention stings grip;
Fig. 3 is the structural schematic diagram that the present invention adds outer seal sleeve.
Specific embodiment
As shown in Figure 1, 2, a kind of quick joint for metal pipes, including quick coupling ontology 1, during quick coupling ontology 1 includes
Between interconnecting piece and end, it is characterised in that: the end is inwardly respectively included lock chambers 11 and seal chamber 12 by port, locking
By step structure transition between chamber 11 and seal chamber 12, also by step structure mistake between seal chamber 12 and middle interconnecting piece
It crosses, beam mouth 13 is arranged in 11 port of lock chambers, and 13 internal diameter of beam mouth is slightly larger than the outer diameter of pipeline 9, and sealing is arranged in the seal chamber 12
Circle 3;It is provided with limit fixator 2 in the lock chambers 11, is provided on the inside of limit fixator 2 and stings grip 5, stings in grip 5
Twice locking mechanism is set, and 2 inner wall of limit fixator is provided with the inclined-plane for making to sting the tightening of grip 5, and described stings grip 5
Elastic positioner 4 is additionally provided between limit fixator 2, and elastic positioner 4 is in the outside for stinging grip 5 and holding pair
Sting active force of the grip 5 to port direction.
The grip 5 of stinging is with the ring-shaped article of opening 51, and the one end for stinging grip 5 is provided with several catchings 52, another
The outer wall at end is provided with cyclic annular positioning seat 53, and the inner wall of middle part or the other end is provided with several latches 55.
The limit fixator 2 includes external fixator 21 and internal fixation device 22, and 21 one end of external fixator connects with beam mouth 13
Touching, the other end connect with internal fixation device 22, and the other end of internal fixation device 22 is against the step between lock chambers 11 and seal chamber 12
On, it is provided with outer inclined-plane 23 on 21 inner wall of external fixator, outer inclined-plane 25, outer inclined-plane are provided on 22 inner wall of internal fixation device
23 cooperate with cyclic annular 53 outer rim of positioning seat, and outer inclined-plane 25 and 52 outer rim of catching cooperate.
The elastic positioner 4 is a spring, and spring one end is placed in cyclic annular positioning seat 53, and the other end withstands on interior solid
On the end face for determining device 22.
It is additionally provided at 11 port of lock chambers and unloads set 6, the one end extroversion for unloading set 6, which sells off to be formed, unloads end surfaces
61, the end surfaces 61 that unload are placed in external fixator 21 and match with 5 end face of grip is stung.
3 side of sealing ring is stopped by the step between seal chamber 12 and middle interconnecting piece, and the other side is by catching
52 stop.
The present invention is mainly characterized by the structure using locking, while elastic positioner relative to existing quick coupling
4 positioned at 5 outside of grip is stung rather than end, and internal structure is more reasonable, and such elastic positioner 4 has abundant deformation space, avoids
There is stuck problem, improves the reliability of product;The effect of catching 52 and latch 55 and inside and outside inclined-plane in elastic positioner 4
Realize double locking, the stability of locking is more preferable, the present invention have it is structurally reasonable, locking effect is good, reliable and stable feature.
As shown in figure 3, being also socketed with outer seal sleeve 8 outside the quick coupling ontology 1, it is characterised in that: described
Outer seal sleeve 8 includes body 81 and connection swivel nut 82, and the body 81 includes seal receptacle 83 and connector sleeve 84, in seal receptacle 83
Sealing ring 85 is arranged in side, and 85 internal diameter of sealing ring matches with 9 outer diameter of pipeline, and described 84 one end of connector sleeve is linked as with seal receptacle 83
The interconnecting piece 86 that one setting at other end port and connect the connection of swivel nut 82;The 1 end bosses outer diameter of quick coupling ontology
Greater than the outer diameter in the middle part of quick coupling ontology, step structure is formed between end and middle part, the connector sleeve 84 can be by end
Whole package.
The connection swivel nut 82 is composed of seperated rosette, and swivel nut internal diameter is connected after combination and is slightly larger than fast quick access
The external screw thread 87 connecting with interconnecting piece is arranged in head ontology middle part outer diameter and the outer end diameter for being less than protrusion, connection 82 one end of swivel nut.
The seal receptacle 83 includes external groove sidevall 831, internal groove side wall 832 and accommodation groove, and 831 height of external groove sidevall is in big
In internal groove side wall 832, the sealing ring 85 includes holding part 851, interior sealing 852 and lateral seal portion 853, holding part 851
It is placed in for fixed seal ring 85 in accommodation groove, interior 852 internal diameter of sealing matches with 9 outer diameter of pipeline, the lateral seal
832 bead of internal groove side wall is wrapped up in portion 853.
Body 81 is socketed on pipeline 9 when use, then by pipeline 9 and 1 plug connection of quick coupling ontology, the company of completion
Connection swivel nut 82 is combined after connecing and is connect with body 81, with being screwed on for connection swivel nut 82, the interior sealing 852 of body 81
And lateral seal portion 853 forms sealing between pipeline and quick coupling end face respectively, the utility model provides for quick coupling
Second sealing, improves the reliability of quick coupling, while playing dustproof effect, has structurally reasonable, practical feature.
Claims (4)
1. a kind of quick joint for metal pipes, including quick coupling ontology (1), quick coupling ontology (1) include middle interconnecting piece and
End, it is characterised in that: the end is inwardly respectively included lock chambers (11) and seal chamber (12), lock chambers (11) by port
By step structure transition between seal chamber (12), also by step structure mistake between seal chamber (12) and middle interconnecting piece
It crosses, beam mouth (13) are arranged in lock chambers (11) port, and beam mouth (13) internal diameter is slightly larger than the outer diameter of pipeline (9), the seal chamber
(12) sealing ring (3) are set;It is provided with limit fixator (2) in the lock chambers (11), setting on the inside of limit fixator (2)
Grip (5) are stung, sting setting twice locking mechanism on grip (5), the limit fixator (2) inner wall, which is provided with, to be made to sting grip
(5) inclined-plane tightened, described stinging is additionally provided with elastic positioner (4) between grip (5) and limit fixator (2), and bullet
Property locator (4) be in the outside for stinging grip (5) and keep to stinging active force of the grip (5) to port direction;Described stinging is grabbed
Part (5) is the ring-shaped article with opening (51), and the one end for stinging grip (5) is provided with several catchings (52), and the outer wall of the other end is set
It is equipped with cyclic annular positioning seat (53), the inner wall of middle part or the other end is provided with several latches (55);The limit fixator
(2) include external fixator (21) and internal fixation device (22), external fixator (21) one end is contacted with beam mouth (13), the other end with it is interior solid
Determine device (22) to connect, the other end of internal fixation device (22) is against on the step between lock chambers (11) and seal chamber (12), described
External fixator (21) inner wall on be provided with outer inclined-plane (23), be provided with outer inclined-plane (25) on internal fixation device (22) inner wall, it is outer tiltedly
Face (23) and cyclic annular positioning seat (53) outer rim cooperate, and outer inclined-plane (25) and catching (52) outer rim cooperate.
2. a kind of quick joint for metal pipes as described in claim 1, it is characterised in that: the elastic positioner (4) is one
Spring, spring one end are placed in cyclic annular positioning seat (53), and the other end is withstood on the end face of internal fixation device (22).
3. a kind of quick joint for metal pipes as described in claim 1, it is characterised in that: described sealing ring (3) side is by close
The step sealed between chamber (12) and middle interconnecting piece stops, and the other side is stopped by catching (52).
4. a kind of quick joint for metal pipes as described in claims 1 to 3 any one, it is characterised in that: the lock chambers
(11) it is additionally provided at port and unloads set (6), the one end extroversion for unloading set (6), which sells off to be formed, unloads end surfaces (61), and described unloads pipe
End face (61) is placed in limit fixator (2) and matches with grip (5) end face is stung.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811199340.6A CN109253336B (en) | 2016-12-31 | 2016-12-31 | Quick joint for metal pipe |
CN201611268125.8A CN106764180B (en) | 2016-12-31 | 2016-12-31 | A kind of quick joint for metal pipes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201611268125.8A CN106764180B (en) | 2016-12-31 | 2016-12-31 | A kind of quick joint for metal pipes |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811199340.6A Division CN109253336B (en) | 2016-12-31 | 2016-12-31 | Quick joint for metal pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
CN106764180A CN106764180A (en) | 2017-05-31 |
CN106764180B true CN106764180B (en) | 2019-05-24 |
Family
ID=58952628
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811199340.6A Expired - Fee Related CN109253336B (en) | 2016-12-31 | 2016-12-31 | Quick joint for metal pipe |
CN201611268125.8A Active CN106764180B (en) | 2016-12-31 | 2016-12-31 | A kind of quick joint for metal pipes |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811199340.6A Expired - Fee Related CN109253336B (en) | 2016-12-31 | 2016-12-31 | Quick joint for metal pipe |
Country Status (1)
Country | Link |
---|---|
CN (2) | CN109253336B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110307406A (en) * | 2019-06-28 | 2019-10-08 | 邓权塑业科技(湖南)有限公司 | A kind of super-silent drainpipe and its production technology |
CN110778827B (en) * | 2019-12-06 | 2024-01-19 | 上汽红岩车桥(重庆)有限公司 | Quick-change connector for sealing and inflating unthreaded hole |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4009896A (en) * | 1976-05-10 | 1977-03-01 | General Motors Corporation | Quick connect coupling |
EP2567135A2 (en) * | 2010-05-04 | 2013-03-13 | Norma U.S. Holding LLC | Connector assembly |
DE102011121089A1 (en) * | 2011-12-15 | 2013-06-20 | Schell Gmbh & Co. Kg | Device for supporting and sealing pipe in pipe outlet or fitting, has mounting sleeve which overlaps and corresponds to nut in screwing or positive-locking direction and enables freewheel in opposite direction |
CN204358309U (en) * | 2014-12-22 | 2015-05-27 | 浙江雨龙管业科技有限公司 | A kind of locking rapid pipe joint |
CN204420414U (en) * | 2015-01-19 | 2015-06-24 | 宁波华平金属制品有限公司 | Lead-free reflow quickly jointed tubular workpieces |
CN206338523U (en) * | 2016-12-31 | 2017-07-18 | 缪灵军 | A kind of quick joint for metal pipes |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1008174C2 (en) * | 1998-01-30 | 1999-08-02 | Flamco Bv | Coupling for connecting two pipe sections together. |
JP2006258145A (en) * | 2005-03-15 | 2006-09-28 | Tokai Rubber Ind Ltd | Air bleeding pipe joint |
JP5864164B2 (en) * | 2011-08-30 | 2016-02-17 | 株式会社モリタホールディングス | Fire hose coupling fittings |
AT512772B1 (en) * | 2012-09-10 | 2013-11-15 | Ke Kelit Kunststoffwerk Gmbh | Plug-in coupling for a metallic pipe, in particular for water pipes |
JP2015197195A (en) * | 2014-04-03 | 2015-11-09 | ニッタ株式会社 | Narrow place piping joint |
CN205136871U (en) * | 2015-10-30 | 2016-04-06 | 郑仕杰 | Tap connecting piece |
-
2016
- 2016-12-31 CN CN201811199340.6A patent/CN109253336B/en not_active Expired - Fee Related
- 2016-12-31 CN CN201611268125.8A patent/CN106764180B/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4009896A (en) * | 1976-05-10 | 1977-03-01 | General Motors Corporation | Quick connect coupling |
EP2567135A2 (en) * | 2010-05-04 | 2013-03-13 | Norma U.S. Holding LLC | Connector assembly |
CN103180650A (en) * | 2010-05-04 | 2013-06-26 | 诺玛美国控股有限责任公司 | Connector assembly |
DE102011121089A1 (en) * | 2011-12-15 | 2013-06-20 | Schell Gmbh & Co. Kg | Device for supporting and sealing pipe in pipe outlet or fitting, has mounting sleeve which overlaps and corresponds to nut in screwing or positive-locking direction and enables freewheel in opposite direction |
CN204358309U (en) * | 2014-12-22 | 2015-05-27 | 浙江雨龙管业科技有限公司 | A kind of locking rapid pipe joint |
CN204420414U (en) * | 2015-01-19 | 2015-06-24 | 宁波华平金属制品有限公司 | Lead-free reflow quickly jointed tubular workpieces |
CN206338523U (en) * | 2016-12-31 | 2017-07-18 | 缪灵军 | A kind of quick joint for metal pipes |
Also Published As
Publication number | Publication date |
---|---|
CN109253336A (en) | 2019-01-22 |
CN106764180A (en) | 2017-05-31 |
CN109253336B (en) | 2020-03-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN101756785B (en) | Luer lock adapter | |
CN106764180B (en) | A kind of quick joint for metal pipes | |
CN203585614U (en) | Pipe joint | |
CN206338523U (en) | A kind of quick joint for metal pipes | |
CN205669638U (en) | A kind of external screw thread snap joint | |
CN205560092U (en) | Clamping sleeve type pipe joint | |
CN201401516Y (en) | Novel butterfly valve | |
CN204829001U (en) | Locking quick -operation joint device that takes off of auto -lock | |
WO2019235930A3 (en) | Pipe coupling with seal | |
CN205956589U (en) | Nylon tube seals head | |
CN111750182A (en) | Pipeline sealing structure | |
CN204420411U (en) | A kind of ready-package pipe joint | |
CN209084214U (en) | A kind of stainless steel combined snap ring connector | |
CN108240516A (en) | A kind of limiting auto-locking suspension metal tube fast connecting joint | |
CN208703414U (en) | A kind of hydraulic cylinder connected pipes | |
JP3181246U (en) | Pressure pipe joint structure | |
CN203190038U (en) | Connecting structure of cylinder mouth and cylinder valve of gas cylinder | |
CN210092467U (en) | Cam anti-loosening structure | |
CN104989893A (en) | Self-locking anti-loosening quick connector device | |
CN213452204U (en) | Assembled stainless steel water pipe pipeline mechanism of plugging into | |
KR200481462Y1 (en) | Connection device for refrigerator refrigerant injection | |
CN212480459U (en) | Improved structure of pipe joint | |
CN208204255U (en) | A kind of sleeve | |
CN205449403U (en) | Getter device suitable for heat -transfer pipe helium leak test | |
CN204512707U (en) | Self-packing pipe coupling |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |