CN109373079A - A kind of non-dismountable connector slotting fastly of pipeline - Google Patents
A kind of non-dismountable connector slotting fastly of pipeline Download PDFInfo
- Publication number
- CN109373079A CN109373079A CN201811520881.4A CN201811520881A CN109373079A CN 109373079 A CN109373079 A CN 109373079A CN 201811520881 A CN201811520881 A CN 201811520881A CN 109373079 A CN109373079 A CN 109373079A
- Authority
- CN
- China
- Prior art keywords
- pipe fitting
- ring
- fixed area
- elastic seal
- bellmouth
- 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.)
- Pending
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
- F16L37/091—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
-
- 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
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses a kind of non-dismountable connectors slotting fastly of pipeline, comprising: the integrally formed connector at pipe port and with pipe fitting, the connector inside being made of socket joint area, fixed area form pipe fitting bellmouth；Elastic seal ring and retaining ring are equipped in the fixed area, elastic seal ring inner ring is inwardly projecting in pipe fitting bellmouth inner wall wall surface；The retaining ring is made of ring body and locking tooth, and the locking tooth is located in ring body in comb teeth structural arrangement；The locking tooth bottom is inwardly projecting in pipe fitting bellmouth inner wall wall surface.The present invention provides a kind of pipeline non-dismountable connector slotting fastly, and structure is simple, and pipe fitting connection sealing is strong, fixed and non-dismountable.
Description
Technical field
The present invention relates to pipelines to be connected and fixed technical field more particularly to a kind of non-dismountable connector slotting fastly of pipeline.
Background technique
Pipeline is connected into pipe, pipe fitting and valve etc. for conveying gas, liquid or with the fluid of solid particle
Device.Having many uses for pipe fitting is general, be used primarily in water supply, draining, heat supply, give gas, long distance delivery oil and natural gas,
In agricultural irrigation, hydraulic engineering and various commercial plants.
In modern society, the use of pipeline is more universal, and applies in various fields, for delivery of fuel gas, water etc.
Substance.It is fixedly connected currently, the connection between two pipelines mainly passes through welding or is bolted, but welding or bolt connect
It connects and is fixedly connected with all inconveniences, time-consuming for installment work, and working efficiency is low.
Summary of the invention
It is excellent it is an object of the invention to solve at least the above problems and/or defect, and provide at least to will be described later
Point.
In order to solve the deficiencies in the prior art, the present invention provides a kind of pipeline non-dismountable connector slotting fastly, comprising:
The connector integrally formed positioned at pipe port, the connector inside being made of socket joint area, fixed area form pipe fitting bellmouth；
Elastic seal ring and retaining ring are equipped in the fixed area, elastic seal ring inner ring is inwardly projecting in pipe fitting bellmouth inner wall wall
Face；The retaining ring is made of ring body and locking tooth, and the locking tooth is located in ring body in comb teeth structural arrangement；It is described to stop
It is inwardly projecting in pipe fitting bellmouth inner wall wall surface to move back bottom of the tooth portion.
Preferably, the elastic seal ring uses rubber seal.
Preferably, socket joint area and fixed area use integral structure.
Preferably, the fixed area is using both ends to pipe fitting bellmouth outer projection and middle part is to pipe fitting bellmouth inner recess
Bent, the elastic seal ring are installed on inside one end high spot that fixed area is connect with socket joint area, and retaining ring is fixed on
Determine inside area's other end high spot, the recess in the middle part of fixed area separates elastic seal ring and retaining ring.
Preferably, the fixed area port is provided with isolation blocking portion, in the isolation blocking portion internal diameter and pipe fitting bellmouth
One of diameter is consistent, and isolation blocking portion can be used the bending part integrally formed with fixed area, stop circle.
Preferably, the internal diameter of the recess inner surface in the middle part of the fixed area is not less than the internal diameter of pipe fitting bellmouth.
Preferably, the fixed area uses the shape to pipe fitting bellmouth outer projection, the elastic seal ring and retaining ring
Between fixed area be internally provided with bracing ring, the bracing ring two sides are connect with the ring body of elastic seal ring, retaining ring respectively；
Bracing ring is equipped with movable part towards the side of locking tooth；Seal ring, the seal ring side are installed at the fixed area port
Face is connect with ring body side.
Preferably, the internal diameter of the bracing ring is not less than the internal diameter of pipe fitting bellmouth.
Preferably, the socket joint area and pipe port junction are equipped with the changeover portion of projection shape, changeover portion large port with
The connection of socket joint area, changeover portion portlet are connect with pipe fitting；Matched positioning seat, the pipe of corresponding internal diameter are provided in the changeover portion
The end face of part is equipped with cricoid seal receptacle, and the positioning seat is provided with several diametrically equidistant towards a side surface of pipe fitting
The locating slot of annular from arrangement；It is convex that the sealed seat surface is equipped with the sealing to match with locating slot to the end face of pipe fitting side
Shoulder.
Preferably, the locating slot sidewall surfaces are provided with rubber pad.
The present invention is include at least the following beneficial effects:
1, the non-dismountable fast slotting connection header structure of pipeline of the invention is simple, is easy installation, installation efficiency is high, and after installation
It is non-dismountable, the case where it is safe to guarantee that pipe uses, avoids the occurrence of malice disassembly, damage pipe fitting；
2, the correspondence internal diameter pipe in elastic seal ring lock ring insertion pipe fitting bellmouth to be sealed, prevent by retaining ring fixing tube
Only pipe is given up the throne phenomenon, and enhance pipe fitting and pipe is connected and fixed stability, avoids pipe fitting and pipe by certain work
Make to fall off when pressure effect, leak, guarantees the stability and leakproofness of connection.
Detailed description of the invention
Fig. 1 is fast slotting a kind of fixed area structural schematic diagram of connector of the invention.
Fig. 2 is a kind of pipe insert structure schematic diagram of fast slotting fixed area of connector of the invention.
Fig. 3 is the partial enlargement structural representation of A in Fig. 2 of the invention.
Fig. 4 is fast slotting connector another kind fixed area structural schematic diagram of the invention.
Fig. 5 is the pipe insert structure schematic diagram of fast slotting connector another kind fixed area of the invention.
Appended drawing reference: 1- pipe fitting, 2- connector, 21- socket joint area, 22- fixed area, 3- pipe fitting bellmouth, 4- elastic seal ring,
5- retaining ring, 51- ring body, 52- locking tooth, 6- isolation stop circle, 7- bracing ring, 71- movable part, the free gap 8-, 9- sealing
Circle, 10- changeover portion, 11- positioning seat, 111- locating slot, 12- seal receptacle, 121- seal convex shoulder, 13- rubber pad, 14- pipe.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of a other elements or combinations thereof.
Fig. 1 ~ 5 show a kind of non-dismountable connector slotting fastly of pipeline of the invention, comprising:
The connector 2 integrally formed positioned at 1 port of pipe fitting forms pipe inside the connector 2 being made of socket joint area 21, fixed area 22
Part bellmouth 3；
It is equipped with elastic seal ring 4 and retaining ring 5 in the fixed area 22,4 inner ring of elastic seal ring is inwardly projecting in pipe fitting bellmouth 3
Inner wall wall surface；The retaining ring 5 is made of ring body 51 and locking tooth 52, and the locking tooth 52 is located in comb teeth structural arrangement
In ring body 51；52 bottom of locking tooth is inwardly projecting in 3 inner wall wall surface of pipe fitting bellmouth.
In this technical solution, the non-dismountable fast connection header structure of inserting of pipeline is simple, is easy installation, installation efficiency
Height, and it is non-dismountable after installation, it is safe to guarantee that pipe uses, avoids the occurrence of malice disassembly, damage the case where pipe fitting；Use external force
By in the pipe insertion pipe fitting bellmouth 3 of corresponding internal diameter, pipe, which is crossed locking tooth 52 and pushed ahead to compressing, crosses elastic seal ring
4, elastic seal ring 4 after elastic deformation occurs for external force reaction force compress lock ring pipe to being sealed, retaining
The locking tooth 52 of ring 5 resists outer tube surface, and pipe is prevented to be reversed a phenomenon, and enhancing pipe fitting 1 is connected and fixed with pipe
Stability is avoided falling off when being acted on by certain operating pressure, be leaked, and guarantees the stability that pipe fitting 1 is connect with pipe
With leakproofness.
In the above-mentioned technical solutions, the elastic seal ring 4 uses rubber seal.Using this scheme, rubber has
Good elasticity, resistance to ag(e)ing and corrosion resistance, water absorption rate is low, is conducive to elastic seal ring 4 and obtains more preferably sealing effect.
In the above-mentioned technical solutions, socket joint area 21 and fixed area 22 use integral structure.Using this scheme, enhancing connects
The integral strength of fitting 2.
In another example, the fixed area 22 is using both ends are to 3 outer projection of pipe fitting bellmouth and middle part is held to pipe fitting
The bent of 3 inner recess of mouth, the elastic seal ring 4 are installed in one end high spot that fixed area 22 is connect with socket joint area 21
Portion, retaining ring 5 are fixed on inside 22 other end high spot of fixed area, the recess at the middle part of fixed area 22 by elastic seal ring 4 with
Retaining ring 5 separates.
In this technical solution, the recess at 22 middle part of fixed area separates elastic seal ring 4 with retaining ring 5 same
When further stable elastic seal ring 4, guarantee the stability of elastic seal ring 4 to guarantee its leakproofness.
In the above-mentioned technical solutions, 22 port of fixed area, which is provided with, is isolated blocking portion 6, in the isolation blocking portion 6
Diameter is consistent with 3 internal diameter of pipe fitting bellmouth, and isolation blocking portion 6 can be used the bending part integrally formed with fixed area 22, stop in circle
It is a kind of.Using this scheme, blocking portion 6 is isolated and keeps out isolation retaining ring 5, avoids artificially inwardly pushing retaining using tool easily
Tooth 52 is further ensured that pipe fitting is connect reliably with pipe to take out pipe backward.
In the above-mentioned technical solutions, the internal diameter of the recess inner surface at 22 middle part of fixed area is not less than pipe fitting bellmouth 3
Internal diameter.Using this scheme, the recess at 22 middle part of fixed area is avoided to hinder the insertion of the pipe of corresponding internal diameter.
In another example, the fixed area 22 is using the shape to 3 outer projection of pipe fitting bellmouth, the elastic packing
Fixed area 22 between circle 4 and retaining ring 5 is internally provided with bracing ring 7,7 two sides of bracing ring respectively with elastic seal ring 4,
The ring body 51 of retaining ring 5 connects；Bracing ring 7 is equipped with movable part 71 towards the side of locking tooth 52；At 22 port of fixed area
Seal ring 9 is installed, 9 one side of seal ring is connect with 51 side of ring body.
In this technical solution, bracing ring 7 further consolidates elastic seal ring 4, and bracing ring 7 stops with the fixation of seal ring 9
Ring 5 is moved back, elastic seal ring 4, retaining ring 3 is avoided to loosen, guarantees the stability of elastic seal ring 4 and retaining ring 3, to protect
It demonstrate,proves locking tooth 32 to act on the retaining of pipe, guarantees the sealing effect of elastic seal ring 4；While seal ring 9 fixes retaining ring 5
Retaining ring 5 is isolated, avoids artificially pushing locking tooth 52 inwardly using tool easily to take out pipe backward.Movable part 71 with only
It moves back between tooth 52 there are free gap 8, free gap 8 avoids bracing ring 7 from hindering the activity of locking tooth 52, holds to pipe fitting insertion pipe fitting
After mouth 3, free gap 8 is not present between movable part 71 and locking tooth 52.
In the above-mentioned technical solutions, the internal diameter of the bracing ring 7 is not less than the internal diameter of pipe fitting bellmouth 3.Using this side
Case, so that bracing ring 7 avoids hindering while realizing fixed elastic seal ring 4, retaining ring 3 the insertion peace of corresponding internal diameter pipe
Dress.
In another example, the socket joint area 21 is equipped with the changeover portion 10 of projection shape, mistake with 1 port junction of pipe fitting
It crosses 10 large port of section to connect with socket joint area 21,10 portlet of changeover portion is connect with pipe fitting 1；Matching is provided in the changeover portion 10
Positioning seat 11, the end face of the pipe fitting of corresponding internal diameter is equipped with cricoid seal receptacle 12, the positioning seat 11 towards pipe fitting one
Side surface is provided with the locating slot 111 of several annulars being diametrically spaced substantially equidistant；The seal receptacle 12 is towards 1 side of pipe fitting
End face be equipped with the sealing convex shoulder 121 that matches with locating slot 111.
In this technical solution, pipe fitting 1 radially, the sealing of the locating slot 111 of positioning seat 11 and seal receptacle 12
The occlusion of convex shoulder 121 forms more bent barriers path, so that fluid overflows leakage from the gap of pipe fitting 1 Yu pipe junction outward
When be hindered, avoid leaking, more bents barrier paths and elastic seal ring 4 constitute dual-seal and guarantee, further enhance
Leakproofness, while positioning seat 11 can realize that the positioning function of pipe fitting, the depth and positioning seat 11 of pipe insertion arrive outside fixed area 22
The distance of port is consistent, so that the depth of pipe insertion is controllable, avoids because of the difference in operation of staff pipe being inserted into
It is too deep or too short.
In the above-mentioned technical solutions, 111 sidewall surfaces of locating slot are provided with rubber pad 13.Using this scheme, rubber
Rubber mat 13 further hinders fluid to leak out, and further enhances leakproofness.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of non-dismountable connector slotting fastly of pipeline characterized by comprising
The connector (2) integrally formed positioned at pipe fitting (1) port, the connector (2) being made of socket joint area (21), fixed area (22)
Inside forms pipe fitting bellmouth (3)；
Be equipped in the fixed area (22) elastic seal ring (4) and retaining ring (5), elastic seal ring (4) inner ring it is inwardly projecting in
Pipe fitting bellmouth (3) inner wall wall surface；The retaining ring (5) is made of ring body (51) and locking tooth (52), and the locking tooth (52) is in
Comb teeth structural arrangement is located on ring body (51)；Locking tooth (52) bottom is inwardly projecting in pipe fitting bellmouth (3) inner wall wall
Face.
2. a kind of non-dismountable connector slotting fastly of pipeline according to claim 1, which is characterized in that the elastic seal ring
(4) rubber seal is used.
3. a kind of non-dismountable connector slotting fastly of pipeline according to claim 1, which is characterized in that socket joint area (21) and solid
Area (22) are determined using integral structure.
4. a kind of non-dismountable connector slotting fastly of pipeline according to claim 1, which is characterized in that the fixed area (22)
Bent using both ends to pipe fitting bellmouth (3) outer projection and from middle part to pipe fitting bellmouth (3) inner recess, the elastic packing
Circle (4) is installed on inside one end high spot that fixed area (22) is connect with socket joint area (21), and retaining ring (5) is fixed on fixed area
(22) inside other end high spot, the recess in the middle part of fixed area (22) separates elastic seal ring (4) and retaining ring (5).
5. a kind of non-dismountable connector slotting fastly of pipeline according to claim 4, which is characterized in that the fixed area (22)
Port is provided with isolation blocking portion (6), and isolation blocking portion (6) internal diameter is consistent with pipe fitting bellmouth (3) internal diameter, and blocking portion is isolated
(6) it can be used and one of fixed area (22) integrally formed bending part, blocking circle.
6. a kind of non-dismountable connector slotting fastly of pipeline according to claim 4, which is characterized in that the fixed area (22)
The internal diameter of the recess inner surface at middle part is not less than the internal diameter of pipe fitting bellmouth (3).
7. a kind of non-dismountable connector slotting fastly of pipeline according to claim 1, which is characterized in that the fixed area (22)
Using the shape to pipe fitting bellmouth (3) outer projection, in the fixed area (22) between the elastic seal ring (4) and retaining ring (5)
Portion is provided with bracing ring (7), bracing ring (7) two sides ring body (51) with elastic seal ring (4), retaining ring (5) respectively
Connection；Bracing ring (7) is equipped with movable part (71) towards the side of locking tooth (52)；Envelope is installed at fixed area (22) port
Mouth circle (9), seal ring (9) one side are connect with ring body (51) side.
8. a kind of non-dismountable connector slotting fastly of pipeline according to claim 7, which is characterized in that the bracing ring (7)
Internal diameter be not less than the internal diameters of pipe fitting bellmouth (3).
9. a kind of non-dismountable connector slotting fastly of pipeline according to claim 1, which is characterized in that the socket joint area (21)
The changeover portion (10) of projection shape is equipped with pipe fitting (1) port junction, changeover portion (10) large port is connect with socket joint area (21),
Changeover portion (10) portlet is connect with pipe fitting (1)；It is provided with matched positioning seat (11) in the changeover portion (10), corresponding internal diameter
The end face of pipe fitting be equipped with cricoid seal receptacle (12), the positioning seat (11) is provided with several edges towards a side surface of pipe fitting
The locating slot (111) for the annular that diametrical direction is spaced substantially equidistant；The seal receptacle (12) towards pipe fitting side end face be equipped with
The sealing convex shoulder (121) that locating slot (111) matches.
10. a kind of non-dismountable connector slotting fastly of pipeline according to claim 9, which is characterized in that the locating slot
(111) sidewall surfaces are provided with rubber pad (13).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811520881.4A CN109373079A (en) | 2018-12-12 | 2018-12-12 | A kind of non-dismountable connector slotting fastly of pipeline |
| PCT/CN2019/106133 WO2020119203A1 (en) | 2018-12-12 | 2019-09-17 | Non-detachable quick insertion connector of pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811520881.4A CN109373079A (en) | 2018-12-12 | 2018-12-12 | A kind of non-dismountable connector slotting fastly of pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109373079A true CN109373079A (en) | 2019-02-22 |
Family
ID=65374003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811520881.4A Pending CN109373079A (en) | 2018-12-12 | 2018-12-12 | A kind of non-dismountable connector slotting fastly of pipeline |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109373079A (en) |
| WO (1) | WO2020119203A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020119203A1 (en) * | 2018-12-12 | 2020-06-18 | 成都共同管业集团股份有限公司 | Non-detachable quick insertion connector of pipeline |
| CN111536331A (en) * | 2020-04-27 | 2020-08-14 | 浙江正同管业有限公司 | Sealing assembly for pipe fitting joint |
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| CN2498434Y (en) * | 2001-08-09 | 2002-07-03 | 李富春 | Pipe connector with fastening screw nut |
| CN101482209A (en) * | 2009-02-06 | 2009-07-15 | 伍婧绫 | Connector of pipe |
| CN102705621A (en) * | 2012-06-21 | 2012-10-03 | 常州升腾管业有限公司 | Pipe connection device |
| US20140312616A1 (en) * | 2012-11-27 | 2014-10-23 | Charlotte Pipe And Foundry Company | Mechanical pipe coupling assembly without adhesive or bonding agent |
| US20150285420A1 (en) * | 2011-06-24 | 2015-10-08 | Mueller Industries, Inc. | Coupling and joint for fixedly and sealingly securing components to one another |
| CN108019566A (en) * | 2018-01-24 | 2018-05-11 | 成都共同管业集团股份有限公司 | A kind of casing head cover and the casing with the head cover |
| CN208138645U (en) * | 2018-03-20 | 2018-11-23 | 常州市武进第二法兰锻造有限公司 | A kind of pipe flange fixing seal structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004007291U1 (en) * | 2004-05-07 | 2005-09-15 | Viega Gmbh & Co Kg | Press connector assembly |
| CN203363485U (en) * | 2013-06-25 | 2013-12-25 | 浙江安弘水暖器材有限公司 | Pipe fast connecting structure |
| CN109373079A (en) * | 2018-12-12 | 2019-02-22 | 成都共同管业集团股份有限公司 | A kind of non-dismountable connector slotting fastly of pipeline |
-
2018
- 2018-12-12 CN CN201811520881.4A patent/CN109373079A/en active Pending
-
2019
- 2019-09-17 WO PCT/CN2019/106133 patent/WO2020119203A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2498434Y (en) * | 2001-08-09 | 2002-07-03 | 李富春 | Pipe connector with fastening screw nut |
| CN101482209A (en) * | 2009-02-06 | 2009-07-15 | 伍婧绫 | Connector of pipe |
| US20150285420A1 (en) * | 2011-06-24 | 2015-10-08 | Mueller Industries, Inc. | Coupling and joint for fixedly and sealingly securing components to one another |
| CN102705621A (en) * | 2012-06-21 | 2012-10-03 | 常州升腾管业有限公司 | Pipe connection device |
| US20140312616A1 (en) * | 2012-11-27 | 2014-10-23 | Charlotte Pipe And Foundry Company | Mechanical pipe coupling assembly without adhesive or bonding agent |
| CN108019566A (en) * | 2018-01-24 | 2018-05-11 | 成都共同管业集团股份有限公司 | A kind of casing head cover and the casing with the head cover |
| CN208138645U (en) * | 2018-03-20 | 2018-11-23 | 常州市武进第二法兰锻造有限公司 | A kind of pipe flange fixing seal structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020119203A1 (en) * | 2018-12-12 | 2020-06-18 | 成都共同管业集团股份有限公司 | Non-detachable quick insertion connector of pipeline |
| CN111536331A (en) * | 2020-04-27 | 2020-08-14 | 浙江正同管业有限公司 | Sealing assembly for pipe fitting joint |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020119203A1 (en) | 2020-06-18 |
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