CN109519622A - A kind of spigot-and-socket steel push pipe connector - Google Patents
A kind of spigot-and-socket steel push pipe connector Download PDFInfo
- Publication number
- CN109519622A CN109519622A CN201811604871.9A CN201811604871A CN109519622A CN 109519622 A CN109519622 A CN 109519622A CN 201811604871 A CN201811604871 A CN 201811604871A CN 109519622 A CN109519622 A CN 109519622A
- Authority
- CN
- China
- Prior art keywords
- socket
- annular
- bellmouth
- tube coupling
- connector
- 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
- F16L25/00—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
- F16L25/10—Sleeveless joints between two pipes, one being introduced into the other
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Joints Allowing Movement (AREA)
Abstract
The present invention relates to a kind of spigot-and-socket steel push pipe connectors, bellmouth connector and socket connection including being respectively welded at steel pipe tube coupling both ends, socket connection inner surface is smooth and internal diameter is identical as steel pipe tube coupling, the multiple tapered ridges of appearance EDS maps of socket connection, the multiple tapered ridge form the first zigzag joint face in socket connection inner surface;Bellmouth connector smooth outer surface and outer diameter is identical as steel pipe tube coupling, the inner surface of bellmouth connector are spaced apart the multiple tapered ridges matched with socket connection, and the multiple tapered ridge forms the second zigzag joint face in bellmouth connector outer surface.Technical characterstic of the invention is: 1, the welding of the interface is completed in factory, and jacking construction scene is transported to after the completion of welding and is directly assembled, can preferably guarantee the quality of welding, and the construction period at the scene of can reducing.2, after the completion of the interface, interface internal diameter and outer diameter and smooth degree are substantially consistent with standard tube coupling, are convenient for jacking construction.
Description
Technical field:
The invention patent is a kind of spigot-and-socket steel push pipe connector, can be used for the connection of aqueduct and other conveyance conduits.
Background technique:
Currently, the enlarging of China's water conveyance pipeline project, reparation and replacement are frequently necessary to especially exist using trenchless technology
City and environmentally sensitive area, non-excavating construction process do not need large area excavated pavement, can be by social influence and environment shadow
Sound minimizes.Compared to traditional digging mode, there are many advantages for no-dig technique mode, and not with technical level and mechanical equipment
Break and develops and become more cost effective.
Push pipe is one kind of the most common aqueduct trenchless technology, and the selection of tubing can be mainly from following aspects
Selection: mechanical property, interface connection type and performance, service life, difficulty of processing, difficulty of construction, transport difficulty.There are commonly
Steel pipe, ductile iron pipe, Prestressed concrete cylinder pipe.
Traditional steel push pipe generally uses the connection type of site welding, although although the mechanical property of steel pipe is preferable,
Tubing convenient transportation, but Steel Welded Joint can expend a large amount of human and material resources, financial resources and time cost, the quality of welding
Difficult to control, the anti-corrosion way service life not up to standard that also will be greatly reduced tubing, and since connector is rigidity, flexible leeway
Smaller, i.e., the leeway that can be rectified a deviation in construction is smaller.
Since traditional steel push pipe has the above deficiency, with the raising of engine request, occurs novel spheroidal graphite casting in the market
Iron push pipe and PCCP push pipe.Novel spheroidal graphite cast-iron push pipe need to increase reinforced concrete in outer layer since interface is to extend out bell and spigot
Native surrounding layer is consistent to guarantee entire body diameter, and that there are intensity is lower for the tubing, substance is big, tube coupling is short, interface is more, surrounding layer reinforcing bar
The problems such as concrete quality is difficult to guarantee, large diameter pipeline (>=1000) cost is high, rigid connector docking difficulty is big.And PCCP
Pipe equally exists above-mentioned similar problems, and in addition PCCP pipe is used for for many years in the U.S., but since nineteen ninety, the U.S.
PCCP pipeline is frequently occurred since high tensile steel wire is broken caused pipe explosion accident, and U.S.'s regulatory authorities are proposed in this problem
Before solution, pressure pipeline is not recommended to select PCCP pipe.
Compared to the country, the steel pipe of external bayonet joint is used for more than 60 years, for the spigot-and-socket of pipe-jacking project
Joint steel pipe had also been used more than 20 years, equal operational excellence.In recent years, research of the China for the spigot-and-socket joint of steel pipe
It is at the early-stage, but in small-scale test and improve the stage, also without corresponding design specification and standard, and it is directed to
The research of spigot-and-socket steel push pipe is even more fewer and fewer.
In conclusion it is domestic it is necessary to carry out the application study to novel spigot-and-socket steel push pipe, and following skill should be met
Art requirement:
1, the live concatenation of tube coupling connector should facilitate, efficiently.
2, connector, which is connected under the various load cases combinations such as external water and soil load, interior water ballast(ing), push pipe thrust, should be able to meet by force
The design requirements such as degree, deformation, watertightness.
3, the jointing between adjacent tube coupling need to have a smooth and continuous outer surface, to reduce in jack-in process
The gap between frictional force on tube coupling outer surface, and the outer surface and drill hole inner wall of reduction tube coupling is acted on, to avoid push pipe
Obvious surface subsidence occurs above route, this is also the basic demand of trenchless technology.
4, the jointing between adjacent tube coupling need to have a smooth and continuous inner surface, to avoid fluid in pipeline
Middle generation turbulent flow or cavitation phenomenon.
5, the jointing between adjacent tube coupling need to meet certain watertightness, should specifically meet design requirement.
6, the jointing between adjacent tube coupling should be able to reach certain bending angle, and can transmit between adjacent tubular segments
Moment of flexure, should specifically meet design requirement.
Summary of the invention:
It is an object of the invention to overcome the shortcomings of current various push pipes, provide a kind of safe, economical, applicable, efficient
Spigot-and-socket steel push pipe connector.
The present invention be by the following technical programs solution above-mentioned technical problem: a kind of spigot-and-socket steel push pipe connector, including
It is respectively welded at the bellmouth connector and socket connection at steel pipe tube coupling both ends, it is characterised in that socket connection inner surface is smooth
And internal diameter is identical as steel pipe tube coupling, the multiple tapered ridges of appearance EDS maps of socket connection, the multiple tapered ridge connects in socket
Fitting inner surface forms the first zigzag joint face;Bellmouth connector smooth outer surface and outer diameter is identical as steel pipe tube coupling, bellmouth
The inner surface of connector is spaced apart the multiple tapered ridges matched with socket connection, and the multiple tapered ridge is connected in bellmouth
Part outer surface forms the second zigzag joint face.
Further, when two neighboring steel pipe tube coupling connects, the socket connection of a steel pipe tube coupling is pressed into another steel
In the bellmouth connector of pipe tube coupling, to complete the connection of two sections of steel pipes, each tapered ridge of bellmouth connector and socket connection
Tapered ridge is bonded to each other, to guarantee that the steel pipe tube coupling connecting node can transmit certain axial compressive force, moment of flexure.
Further, the inner surface of the outer surface of the socket connection and bellmouth connector smears sealing material or setting
Sealing joint strip has reached the effect of sealing.
Further, the socket connection includes the socket welding ends for joint steel pipe tube coupling, and for connecting
The socket end of another steel pipe tube coupling, the first zigzag joint face are located at socket end, and the first zigzag joint face includes
Several sections are disconnected, and along socket welding ends to socket extreme direction, disconnected each section includes sequentially connected annular concave plane, annular vertical
Face, convex annular plane, annular slope, and connection end annular is recessed flat after the annular slope for end of breaking near socket end segment
Face;And along socket welding ends to socket extreme direction, save disconnected annular concave plane, annular vertical surface, convex annular plane section half
Diameter is gradually reduced;
The bellmouth connector includes the bellmouth welding ends for joint steel pipe tube coupling, and for connecting another steel pipe
The female end of section, the second zigzag joint face are located at female end, and the second zigzag joint face includes that several sections are disconnected,
Along bellmouth welding ends to bellmouth extreme direction, each section is disconnected including sequentially connected annular slope, annular concave plane, annular vertical
Face, convex annular plane, and recessed flat near the disconnected starting point setting of bellmouth welding end segment and the end annular of socket connection
The starting point convex annular plane that face matches, and along bellmouth welding ends to bellmouth extreme direction, save disconnected annular concave plane, annular is hung down
It faces directly, the section radius of convex annular plane is gradually increased.
Further, socket annular solder inclined-plane, socket annular welds are cut on the outside of the socket welding ends of socket connection
It connects inclined-plane and passes through solder design to the end of steel pipe tube coupling;Bellmouth annular welds are cut on the outside of the bellmouth welding ends of bellmouth connector
Inclined-plane is connect, bellmouth annular solder inclined-plane passes through solder design to the end of steel pipe tube coupling.
Of the invention is technically characterized in that
1, this interface is made of bellmouth connector and socket connection component.Bellmouth connector and socket connection can be in factories
Steel pipe tube coupling to be spliced together both ends are welded to, can be directly assembled at the scene after being transported to scene, or combine push pipe jacking device
Spliced, reduces the artificial of site welding work generation, equipment cost and time cost, can preferably guarantee the matter of welding
Amount, and the construction period at the scene of can reducing.
2, the socket connection inner surface in this interface is smooth and internal diameter is the same as steel pipe tube coupling, bellmouth connector smooth outer surface
And outer diameter is with steel pipe tube coupling, after the completion of bellmouth connector and socket connection splicing, that is, formed inner and outer surfaces it is smooth and
Inside and outside diameter jointing identical with steel pipe tube coupling.After the completion of the interface, interface internal diameter and outer diameter and smooth degree are basic
It is consistent with standard tube coupling, it is convenient for jacking construction.
3, before connector is assembled, sealing material (such as organic sealed silicone) is applied to the socket connection
The inner surface of outer surface and bellmouth connector, or setting sealing joint strip, can not only play the lubricating action during assembly, but also can be
Sealing function is played after sealing material solidification, and according to design requirement, examination water test is carried out before jacking, it is ensured that watertightness.
4, after the completion of bell socket connection, each tapered ridge of bellmouth connector and the tapered ridge of socket connection are answered
It is bonded to each other, to guarantee that the node can transmit certain axial compressive force, moment of flexure.
Detailed description of the invention:
Fig. 1 is the perspective view of spigot-and-socket joint operating environment of the present invention;
Fig. 2 is the A-A partial sectional view of the spigot-and-socket joint of the present invention in Fig. 1;
Fig. 3 is the partial sectional view after the completion of spigot-and-socket joint of the present invention is assembled.
It include: the 1, first steel pipe tube coupling, the 2, second steel pipe tube coupling, 3, socket connection, 4, bellmouth connector, 5, top in figure
Pipe hole, 6, upper pipe working well, the 7, first cylindrical outer surface, the 8, first cylindrical form interior surface, 9, bellmouth connector cylinder
Outer surface, 10, bellmouth connector cylindrical form interior surface, the 11, first zigzag joint face, the 12, second zigzag joint face, 13,
Second zigzag joint face right side, the 14, first zigzag joint face right side, the 15, second zigzag joint face left side,
16, the first zigzag joint face left side, 17, socket welding ends, the 18, first steel pipe tube coupling end, 19, socket annular solder it is oblique
Face, 20, weld seam, 21, bellmouth welding ends, the 22, second steel pipe tube coupling end, 23, bellmouth annular solder inclined-plane, 24, weld seam, 25,
The first annular concave plane of socket connection, 35, the annular concave plane of socket connection second, 45, socket connection third annular it is recessed
Plane, 55, socket connection end annular concave plane, 26, the annular first convex flat face of socket connection, 36, socket connection the
Second ring convex flat face, 46, socket connection third convex annular plane, 27, the first annular vertical plane of socket connection, 37, socket
Connector ring the second shape vertical plane, 47, socket connection third annular vertical surface, 28, the first annular inclined-plane of socket connection,
38, the second annular slope of socket connection, 48, socket connection third annular slope, 31, bellmouth connector starting point convex annular
Plane, 41, the first annular convex flat face of bellmouth connector, 51, bellmouth connector the second convex annular plane, 61, bellmouth connector
Three annular convex flat faces, 32, the first annular inclined-plane of bellmouth connector, 42, the second annular slope of bellmouth connector, 52, bellmouth connection
Part third annular slope, 33, the first annular concave plane of bellmouth connector, 43, the annular concave plane of bellmouth connector second, 53, hold
Mouth connector third annular concave plane, 44, the first annular vertical plane of bellmouth connector, 54, the second annular vertical of bellmouth connector
Face, 64, bellmouth connector third annular vertical surface.
Specific embodiment:
The present invention is described in further detail with reference to the accompanying drawings of the specification.
Fig. 1 is operating environment when spigot-and-socket joint of the present invention is applied to jacking construction, the first steel pipe tube coupling 1 and the second steel
Pipe tube coupling 2 is spliced in upper pipe working well 6 by the different types of socket connection 3 in its both ends, bellmouth connector 4, and
It heads into the soil body.It should be noted that this operating environment only represents one of various engineer applications of the present invention in Fig. 1,
It is contemplated that the present invention may be use with the connector of digging direct-buried steel pipe or as vertical jointing of load-bearing tubular pole etc..
Connection component of the invention is made of socket connection 3 and bellmouth connector 4.Connector preferentially selects carbon steel,
The steel of the various grades such as stainless steel can also be selected, but the load actions such as connector splicing internal force, jacking forces in pipe-jacking should be able to be born.
Bellmouth connector and socket connection can be welded to steel pipe tube coupling to be spliced together both ends in factory, can be after being transported to scene
It is live directly assembled, or spliced in conjunction with push pipe jacking device, reduce artificial, equipment cost that site welding work generates
And time cost, specifically the production method is as follows:
As shown in figure 3, radially, socket connection 3 is with table in the first cylindrical outer surface 7, the first cylinder
Face 8 and the first zigzag joint face 11, the diameter in these three faces and the first steel pipe tube coupling 1 welded therewith it is identical.Along axis
To direction, socket connection 3 has the socket welding ends 17 for joint steel pipe tube coupling, and for connecting another steel pipe tube coupling
Socket end 16, be cut into socket annular solder inclined-plane 19, socket annular solder on the outside of the socket welding ends 17 of socket connection 3
The socket welding ends 17 of socket connection 3 is connected to the first steel pipe tube coupling end 18, the Welder by weld seam 20 by inclined-plane 19
Work can be completed in factory.
Socket connection 3 has the first zigzag joint face 11, extends to the from the first zigzag joint face right side 14
One zigzag joint face left side 16.It can be seen in the drawings that being distributed the different cone of multiple sizes in zigzag joint face 11
Shape ridge, size is gradually reduced from right to left, and foring multiple annular concave planes, (the first annular concave plane 25 of socket connection is inserted
Mouth connector second annular concave plane 35, socket connection third annular concave plane 45, socket connection end annular concave plane
55, diameter is sequentially reduced), convex annular plane (the annular convex flat of the first socket connection convex annular plane 26, socket connection second
Face 36, socket connection third convex annular plane 46, diameter is sequentially reduced), annular vertical surface (socket connection it is first annular hang down
Face the second annular vertical surface of 27, socket connection 37, socket connection third annular vertical surface 47 directly, diameter is sequentially reduced), ring
Shape inclined-plane (the first annular inclined-plane 28 of socket connection, the second annular slope of socket connection 38, socket connection third circular slanting
Face 48).
Bellmouth connector 4 has the second cylindrical outer surface 9, the second cylindrical form interior surface 10 and the connection of the second zigzag
Face 12, the diameter in these three faces and the second steel pipe tube coupling 2 welded therewith it is identical.Outside the bellmouth welding ends of bellmouth connector 4
Lateral incision is cut into bellmouth annular solder inclined-plane 23, and bellmouth annular solder inclined-plane 23 is connected the end of bellmouth connector 4 by weld seam 24
It is connected to the second steel pipe tube coupling end 22, which can complete in factory.
Bellmouth connector 4 has the second zigzag joint face 12, extends to second from the second zigzag joint face left side
Zigzag joint face right side.It can be seen in the drawings that second is distributed the different cone of multiple sizes in zigzag joint face 12
Shape ridge, from left to right size is gradually reduced, and foring multiple annular slopes, (the first annular inclined-plane 32 of bellmouth connector, bellmouth connect
The second annular slope of fitting 42, bellmouth connector third annular slope 52), convex annular plane (bellmouth connector starting point annular
Convex flat face 31, the first annular convex flat face 41 of bellmouth connector, the second convex annular of bellmouth connector plane 51, bellmouth connector third
Convex annular plane 61, diameter is sequentially reduced), annular concave plane (the first annular concave plane 33 of bellmouth connector, bellmouth connector the
Second ring concave plane 43, bellmouth connector third annular concave plane 53, diameter is sequentially reduced), annular vertical surface (it is first annular hang down
Face the 44, second annular vertical surface 54, third annular vertical surface 64 directly, diameter is sequentially reduced).
The tapered ridge of bellmouth connector is slightly less than the tapered ridge of socket connection, i.e., between two neighboring steel pipe tube coupling
Tight fit is formed between socket connection and bellmouth connector, therefore two connectors can be completed by needing to apply certain pressing force
Connection, the application process of pressing force, two connector steel are in elastic limits, are completed when the bell socket connects
Afterwards, each tapered ridge of bellmouth connector and the tapered ridge of socket connection are bonded to each other, it is ensured that the node can transmit certain
Axial compressive force, moment of flexure.
After the completion of this pipe joint is assembled, the of the first zigzag joint face 11 of socket connection 3 and bellmouth connector 4
The anchor ring that each tapered ridge of two zigzag joint face 12 is formed should be bonded to each other, to guarantee that the node can transmit certain axial pressure
Power, moment of flexure, for example, the bellmouth of the corresponding fitting bellmouth connector 4 in the socket connection third annular concave plane 45 of socket connection 3
The first annular convex flat face 41 of connector, concrete condition is as shown in the table:
Table 1 holds, socket connection mapping table
Note: two faces of same row are bonded to each other after the completion of representing bell and spigot interface docking.
Due to holding, the manufacturing process of socket connection can have a certain error, may between the face being bonded to each other in upper table
There can be minim gap, need that sealing material is taken to be filled.Before connector docking, connected in the zigzag of socket connection
Uniformly smear sealing material on the zigzag joint face of face and bellmouth connector, for example, room temperature vulcanized organosilicon sealant or other
Sealing material, the sealing material can play lubricating action in docking operation, can seal after hardening.
Claims (5)
1. a kind of spigot-and-socket steel push pipe connector, the bellmouth connector including being respectively welded at steel pipe tube coupling both ends is connected with socket
Part, it is characterised in that socket connection inner surface is smooth and internal diameter is identical as steel pipe tube coupling, the appearance EDS maps of socket connection
Multiple tapered ridges, the multiple tapered ridge form the first zigzag joint face in socket connection inner surface;Outside bellmouth connector
Surface is smooth and outer diameter is identical as steel pipe tube coupling, the inner surface of bellmouth connector be spaced apart matched with socket connection it is more
A tapered ridge, the multiple tapered ridge form the second zigzag joint face in bellmouth connector outer surface.
2. the spigot-and-socket steel push pipe connector according to claim 1, it is characterised in that when two neighboring steel pipe tube coupling connects,
The socket connection of one steel pipe tube coupling is pressed into the bellmouth connector of another steel pipe tube coupling, to complete the company of two sections of steel pipes
It connects, each tapered ridge of bellmouth connector and the tapered ridge of socket connection are bonded to each other, to guarantee the steel pipe tube coupling connecting node
Certain axial compressive force, moment of flexure can be transmitted.
3. the spigot-and-socket steel push pipe connector according to claim 1, it is characterised in that the outer surface of the socket connection
Sealing material or setting sealing joint strip are smeared with the inner surface of bellmouth connector, to achieve the effect that sealing.
4. the spigot-and-socket steel push pipe connector according to claim 2, it is characterised in that the socket connection includes being used for
The socket welding ends of joint steel pipe tube coupling, and the socket end for connecting another steel pipe tube coupling, the first zigzag connection
Face is located at socket end, and the first zigzag joint face includes that several sections are disconnected, along socket welding ends to socket extreme direction, each
Disconnected section includes sequentially connected annular concave plane, annular vertical surface, convex annular plane, annular slope, and near socket end
End annular concave plane is connected after saving the annular slope of disconnected end;And disconnected annular is saved to socket extreme direction along socket welding ends
Concave plane, annular vertical surface, convex annular plane section radius be gradually reduced;
The bellmouth connector includes the bellmouth welding ends for joint steel pipe tube coupling, and for connecting another steel pipe tube coupling
Female end, the second zigzag joint face are located at female end, and the second zigzag joint face includes that several sections are disconnected, and edge is held
For mouth welding ends to bellmouth extreme direction, each section is disconnected including sequentially connected annular slope, annular concave plane, annular vertical surface, ring
Shape convex flat face, and match near the end annular concave plane of the disconnected starting point setting of bellmouth welding end segment and socket connection
The starting point convex annular plane of conjunction, and along bellmouth welding ends to bellmouth extreme direction, save disconnected annular concave plane, annular vertical surface,
The section radius of convex annular plane is gradually increased.
5. the spigot-and-socket steel push pipe connector according to claim 4, it is characterised in that the socket welding ends of socket connection
Outside is cut into socket annular solder inclined-plane, and socket annular solder inclined-plane passes through solder design to the end of steel pipe tube coupling;Bellmouth
Bellmouth annular solder inclined-plane is cut on the outside of the bellmouth welding ends of connector, bellmouth annular solder inclined-plane passes through solder design to steel
The end of pipe tube coupling.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811604871.9A CN109519622A (en) | 2018-12-26 | 2018-12-26 | A kind of spigot-and-socket steel push pipe connector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811604871.9A CN109519622A (en) | 2018-12-26 | 2018-12-26 | A kind of spigot-and-socket steel push pipe connector |
Publications (1)
Publication Number | Publication Date |
---|---|
CN109519622A true CN109519622A (en) | 2019-03-26 |
Family
ID=65798260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811604871.9A Pending CN109519622A (en) | 2018-12-26 | 2018-12-26 | A kind of spigot-and-socket steel push pipe connector |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN109519622A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110081249A (en) * | 2019-06-14 | 2019-08-02 | 章龙彬 | A kind of self-locking socket joint pipe joint of flexibility double containment |
CN112797229A (en) * | 2021-03-04 | 2021-05-14 | 中建三局安装工程有限公司 | Pipe jacking construction auxiliary facility |
-
2018
- 2018-12-26 CN CN201811604871.9A patent/CN109519622A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110081249A (en) * | 2019-06-14 | 2019-08-02 | 章龙彬 | A kind of self-locking socket joint pipe joint of flexibility double containment |
CN112797229A (en) * | 2021-03-04 | 2021-05-14 | 中建三局安装工程有限公司 | Pipe jacking construction auxiliary facility |
CN112797229B (en) * | 2021-03-04 | 2022-05-31 | 中建三局安装工程有限公司 | Pipe jacking construction auxiliary facility |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104405975A (en) | Steel pipe with bell and spigot joints | |
ATE481203T1 (en) | DEVICE WITH A TUBE/CONNECTOR WELD JOINT | |
CN204062233U (en) | The cold connection set of a kind of pipeline | |
CN109519622A (en) | A kind of spigot-and-socket steel push pipe connector | |
CN105546215B (en) | A kind of jacking method of assembled curve steel pipe jacking section header | |
CN209524205U (en) | A kind of spigot-and-socket steel push pipe connector | |
CN202580486U (en) | Electric-welding connecting flare-type joint of small-bore plastic-coated steel pipe | |
CN104896218A (en) | Bimetal composite pipe end connecting device | |
CN105356407B (en) | Phytal zone Waterproof connector of cable and connection method | |
CN106337970B (en) | Submarine pipeline construction method | |
KR101344183B1 (en) | Transition fitting and connecting method therewith for gas pipes | |
CN212480442U (en) | Hydraulic engineering protector | |
CN204647602U (en) | A kind of composite bimetal pipe pipe end linkage structure | |
CN208917888U (en) | No-welding direct insertion sound detecting pipe | |
KR20100134425A (en) | Coupling apparatus for divergence of pipe and method for coupling pipe of divergence using the coupling apparatus | |
KR20120007452U (en) | Gasket having metal ring using pipe connecting device | |
CN202972253U (en) | Reinforced water drainage pipe connector and connection structure thereof | |
CN207298164U (en) | A kind of socket joint type pipeline socket connecting elements | |
CN202247967U (en) | Spiral connection embedded pipe | |
CN206779730U (en) | The spherical spigot-and-socket welding point of steel pipe | |
CN104482346B (en) | Sealed pipe link | |
CN104633359A (en) | Socket connection type bend | |
CN203431414U (en) | Variable-diameter-pipeline excavation-free repair device | |
CN203880262U (en) | Delivery pipe and pumping device | |
CN202274216U (en) | Double-socket flexible casing |
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 |