CN204284748U - A kind of hose coupling - Google Patents
A kind of hose coupling Download PDFInfo
- Publication number
- CN204284748U CN204284748U CN201420783634.4U CN201420783634U CN204284748U CN 204284748 U CN204284748 U CN 204284748U CN 201420783634 U CN201420783634 U CN 201420783634U CN 204284748 U CN204284748 U CN 204284748U
- Authority
- CN
- China
- Prior art keywords
- joint
- sleeve
- connecting head
- flexible pipe
- fixed end
- 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
Landscapes
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
A kind of hose coupling of the utility model, its drip irrigation device comprises the passage axially arranged in sleeve, connecting head and connecting head, described connecting head one end is provided with the joint for connecting hose, the end of described joint is outward-dipping tapered structure, the outer wall radial direction of described joint is provided with bulge loop, and the other end of described joint its end face relative is provided with outside thread; Described sleeve comprises penetrating to be held and fixed end, penetrate end and fixed end lays respectively at the two ends of sleeve, fixed end inwall is provided with the internal thread mated with outside thread, the wall thickness of described fixed end is less than the wall thickness penetrating end, when described sleeve is connected with connecting head, position between the end of the inwall corresponding connection parts of sleeve and bulge loop is provided with sphenoid surface, described sphenoid surface self-retaining end is obliquely installed to penetrating end, describedly penetrate the gap being provided with between end with joint and penetrating for flexible pipe, described fixed end is also provided with stuffing box gland.Feature of the present utility model is that sealing is high, Drop-proof, and convenient installation.
Description
Technical field
The utility model relates to a kind of pipe joint, and more particularly it relates to a kind of hose coupling.
Background technique
Existing hose coupling mainly includes two kinds, a kind of is the band hose coupling of sleeve and the hose coupling not with sleeve, only by rubber hose is overlapped on the socket end with hose coupling usually when hose coupling not with sleeve is connected with rubber hose, this Placement is the most common, as being placed on water tap by water pipe in family, although dismounting is all more convenient, airtight performance is poor, especially, when in pipe, pressure is excessive, flexible pipe easily comes off; And the advantage of the hose coupling of existing band sleeve to utilize sheathed sleeve outside flexible pipe, sleeve is connected with the body of hose coupling, increase the junction surface with flexible pipe, enlarged contact areas, make flexible pipe difficult drop-off, sealability also increases, but there is the very inconvenient problem of dismounting in this hose coupling, existing flexible pipe mostly is rubber material, friction factor is large, when flexible pipe is placed on hose coupling, sleeve conflict with flexible pipe together be difficult to install, need the time strength of at substantial can by sleeve fix in position.
Model utility content
For the deficiency that prior art exists, it is high that the purpose of this utility model is to provide a kind of sealing, Drop-proof, the convenient hose coupling installed.
For achieving the above object, the utility model provides following technological scheme: a kind of hose coupling, comprises the passage axially arranged in sleeve, connecting head and connecting head,
Described connecting head one end is provided with the joint for connecting hose, and the end of described joint is outward-dipping tapered structure, and the outer wall radial direction of described joint is provided with bulge loop, and the other end of described joint its end face relative is provided with outside thread;
Described sleeve comprises penetrating to be held and fixed end, penetrate end and fixed end lays respectively at the two ends of sleeve, fixed end inwall is provided with the internal thread mated with outside thread, the wall thickness of described fixed end is less than the wall thickness penetrating end, when described sleeve is connected with connecting head, position between the end of the inwall corresponding connection parts of sleeve and bulge loop is provided with sphenoid surface, and described sphenoid surface self-retaining end is obliquely installed to penetrating end, described in penetrate the gap being provided with between end with joint and penetrating for flexible pipe;
The side panel at the outside thread place place of described joint is also provided with the caulking groove of annular, and one end is sealedly attached to the stuffing box gland in caulking groove, and described stuffing box gland is placed between the outer surface of fixed end and caulking groove, and described caulking groove is made can be routed up from inside to outside by elastic material.
By adopting technique scheme, this hose coupling comprises sleeve and connecting head, the passage axially arranged in connecting head is circulation passage, connecting head one end is that joint is for connecting hose, flexible pipe is fixing for being placed on joint, the feature of this joint is that its end is provided with outward-dipping conical surface, and the rear of conical surface is also provided with a bulge loop, this design effectively strengthens the fixation of flexible pipe and joint, conical surface being mutually arranged so that joint is easier and piercing in the opening of flexible pipe of joint smooth surface is than ever set in joint end, and conical surface is owing to outwards strutting, stronger to the fastening effect of flexible pipe, it is more firm when flexible pipe is fixed on joint, difficult drop-off, the bulge loop arranged then further strengthens above-mentioned fastening effect, when only only have conical surface to flexible pipe play strut effect time, joint pierces in flexible pipe, the outer radius of conical surface is only only had to abut with hose inner wall, the softened front end of flexible pipe can lack fixing, when flexible pipe is subject to power more outside, still easily come off, as firmly flexible pipe outwards pulled.By the setting of bulge loop, joint penetrates after in flexible pipe, and flexible pipe is strutted by conical surface, continues joint to push in flexible pipe, the softened part in flexible pipe front end is placed on bulge loop again, the surface of contact of flexible pipe and joint is increased further, and by flexible pipe softened after elastic reaction, be placed on tightly on joint, fixed effect is strengthened further, and effectively improve the tightness of joint, can not there is seepage in joint, convenient and practical.
Sleeve in addition in this programme coordinates with connecting head and can play the protections such as more fully fixing, sealing to flexible pipe, and is easier to install than sleeve in the past.Sleeve cylindrically, one end is provided with internal thread, for coordinating fixed muffle with the outside thread of joint, the fixed end wall thickness of sleeve is less than the wall thickness penetrating end, therefore the internal diameter of its fixed end is greater than the internal diameter penetrating end, and the inwall of sleeve is provided with sphenoid surface, and namely this sphenoid surface is positioned at the transition portion penetrating end and fixed end, and the position of sphenoid surface just in time corresponds to the position between conical surface and bulge loop, is mainly part softened when flexible pipe is placed on joint herein.When flexible pipe is installed, first flexible pipe is held through sleeve from penetrating, again joint is filled in flexible pipe, and then again sleeve is promoted toward connecting head direction, the action of accompanying rotation sleeve can be moved toward connecting head direction, initially, wall thickness due to fixed end is less than and penetrates end, the inwall of fixed end does not contact with hose surface, surface of contact less dragging sleeve is lighter, when sleeve fixed end moves to the conical surface place of joint, flexible pipe is strutted by conical surface, the contact internal walls of flexible pipe and fixed end, because the internal diameter of fixed end is greater than penetrate end, it is greater than the inner-diameter portion whose penetrating end and is just being used on the softened part of tolerance sleeve, and the setting of sphenoid surface, sleeve still can be twisted to connecting head by the mode rotated and be connected with connecting head by sleeve easily, and when sleeve is connected with connecting head, the sphenoid surface of sleeve lining and the outer wall compact siro spinning technology of flexible pipe, flexible pipe is fixed, the fixed effect of flexible pipe is more firm, difficult drop-off.
Simultaneously in order to further strengthen the sealing of this novel hose connector, the utility model is also provided with a stuffing box gland, one end of stuffing box gland is sealedly attached in caulking groove, the body of stuffing box gland is then placed between the fixed end outer wall of sleeve and caulking groove, because fixed end is for being threaded with joint, be threaded and easily there is gap, therefore at the other caulking groove arranging annular in the side of threaded connection place, in one end of sleeve is sealedly attached to, the other end is placed on the outer wall of fixed end, thus make sleeve be wrapped in stuffing box gland by the connection part of fixed end and joint, the structure of suit makes sealing surface effectively increase, and reach better sealing effect by the elastic reaction of stuffing box gland, and in order to avoid affecting the installation of flexible pipe, sealing is placed on when flexible pipe is installed and can digs from inside to outside, turn over the opposite side to joint, turn back again after flexible pipe installs, thus reach enhanced leaktightness but do not affect flexible pipe install effect.
Comprehensive such scheme, the remarkable result of the phase of this novel hose connector hose coupling is than ever that sealing is high, Drop-proof, conveniently installs.
The utility model is set to further: the opposite side of described joint its end relative is provided with the flanging extended radially outwardly, when described sleeve is connected with connecting head, the end of fixed end and flanging are fitted and are arranged, and the outer wall of the inwall of fixed end near its end and joint is fitted and arranged.
By adopting technique scheme; the flanging width arranged and the thickness of fixed end just coincide; when sleeve is connected with connecting head; the end wall of fixed end is contacted at here; and the outer wall of the inwall of fixed end and joint is fitted; by the mode that end wall and the inwall of fixed end are fitted with flanging, joint outer wall respectively; the tightness at further this place of reinforcement; also the threaded connection place of available protecting sleeve and joint; make its not with extraneous contact; effectively prevent its corrosion, prevent joint failure, strengthen the stability that it uses.
The utility model is set to further: described in penetrate end inwall be provided with some annular grooves.
By adopting technique scheme, penetrate some annulars that end is arranged, when penetrating flexible pipe, due to the setting of groove, reduce the surface of contact with sleeve pipe, flexible pipe is pierced into more convenient, when hose coupling and flexible pipe come into operation, be full of fluid in flexible pipe, by the pressure effect of fluid, and flexible pipe band is flexible, the part that flexible pipe is arranged in groove sinks into groove slightly by fluid pressure action, form with groove walls and necessarily conflict, the fixation of reinforced hose, prevent flexible pipe from coming off further.
The utility model is set to further: the outer wall of described sleeve is provided with frosting.
By adopting technique scheme, the matte surface that flexible pipe is arranged strengthens sleeve surface roughness, and make not easily to skid during installing sleeve, grip feeling is comfortable, facilitates the installation of sleeve.
The utility model is set to further: the other end of described connecting head opposing connections is provided with ready-packaged joint.
By adopting technique scheme, ready-packaged joint is standardized component, one end of connecting head is arranged to the structure of ready-packaged joint, facilitates the installation of hose coupling and other part standard.
Accompanying drawing explanation
Fig. 1 is the sectional view one of this practical a kind of hose coupling embodiment;
Fig. 2 is the sectional view two of this practical a kind of hose coupling embodiment;
Fig. 3 is the structural representation of this practical a kind of hose coupling embodiment;
Fig. 4 is the explosive view of this practical a kind of hose coupling sleeve and connecting head;
Fig. 5 is the internal structural map of this practical a kind of hose coupling embodiment;
Fig. 6 is the part A enlarged view of Fig. 5.
Description of reference numerals: 1, connecting head; 2, sleeve; 3, threaded connection place; 4, stuffing box gland; 11, joint; 12, conical surface; 13, bulge loop; 14, flanging; 15, ready-packaged joint; 16, caulking groove; 21, end is penetrated; 22, fixed end; 23, sphenoid surface; 24, groove.
Embodiment
Referring to figs. 1 through Fig. 6, a kind of hose coupling embodiment of the utility model is described further.
A kind of hose coupling described in the present embodiment, comprise the passage axially arranged in sleeve 2, connecting head 1 and connecting head 1, described connecting head 1 one end is provided with the joint 11 for connecting hose, the end of described joint 11 is outward-dipping tapered formation conical surface 12, conical surface 12 rear end is circular arc, the outer wall radial direction of described joint 11 is provided with bulge loop 13, and the other end of described joint 11 its end face relative is provided with outside thread; Described sleeve 2 comprises and penetrates end 21 and fixed end 22, penetrate the two ends that end 21 and fixed end 22 lay respectively at sleeve 2, fixed end 22 inwall is provided with the internal thread mated with outside thread, the wall thickness of described fixed end 22 is less than the wall thickness penetrating end 21, when described sleeve 2 is connected with connecting head 1, position between the end of the inwall corresponding connection parts 11 of sleeve 2 and bulge loop 13 is provided with sphenoid surface 23, described sphenoid surface 23 self-retaining end 22 is obliquely installed to penetrating end 21, described in penetrate the gap being provided with between end 21 and joint 11 and penetrating for flexible pipe.
Below this hose coupling is described further, this hose coupling comprises sleeve 2 and connecting head 1, the passage axially arranged in connecting head 1 is circulation passage, connecting head 1 one end is that joint 11 is for connecting hose, flexible pipe is fixing for being placed on joint 11, the feature of this joint 11 is that its end is provided with outward-dipping conical surface 12, and the rear of conical surface 12 is also provided with a bulge loop 13, this design effectively strengthens the fixation of flexible pipe and joint 11, conical surface 12 phase being arranged so that joint 11 is easier and piercing in the opening of flexible pipe of joint 11 smooth surface is than ever set in joint 11 end, and conical surface 12 is owing to outwards strutting, stronger to the fastening effect of flexible pipe, it is more firm when flexible pipe is fixed on joint 11, difficult drop-off, the bulge loop 13 arranged further strengthens above-mentioned fastening effect, when only only having conical surface 12 pairs of flexible pipes to play to strut effect, joint 11 pierces in flexible pipe, the outer radius of conical surface 12 is only only had to abut with hose inner wall, the softened front end of flexible pipe can lack fixing, when flexible pipe is subject to power more outside, still easily come off, as firmly flexible pipe outwards pulled.By the setting of bulge loop 13, joint 11 penetrates after in flexible pipe, and flexible pipe is strutted by conical surface 12, continues joint 11 to push in flexible pipe, the softened part in flexible pipe front end is placed on bulge loop 13 again, the surface of contact of flexible pipe and joint 11 is increased further, and by flexible pipe softened after elastic reaction, be placed on joint 11 tightly, fixed effect is strengthened further, and effectively improve the tightness of joint, can not there is seepage in joint, convenient and practical.
Sleeve 2 in addition in this programme coordinates with connecting head 1 and can play the protections such as more fully fixing, sealing to flexible pipe, and is easier to install than sleeve 2 in the past.Sleeve 2 cylindrically, one end is provided with internal thread, for coordinating fixed muffle 2 with the outside thread of joint 11, fixed end 22 wall thickness of sleeve 2 is less than the wall thickness penetrating end 21, therefore the internal diameter of its fixed end 22 is greater than the internal diameter penetrating end 21, and the inwall of sleeve 2 is provided with sphenoid surface 23, namely this sphenoid surface 23 is positioned at the transition portion penetrating end 21 and fixed end 22, and the position of sphenoid surface 23 just in time corresponds to the position between conical surface 12 and bulge loop 13, is mainly part softened when flexible pipe is placed on joint 11 herein.When flexible pipe is installed, first flexible pipe is passed sleeve 2 from penetrating end 21, again joint 11 is filled in flexible pipe, and then again sleeve 2 is promoted toward connecting head 1 direction, the action of accompanying rotation sleeve 2 can be moved toward connecting head 1 direction, initially, wall thickness due to fixed end 22 is less than and penetrates end 21, the inwall of fixed end 22 does not contact with hose surface, surface of contact less dragging sleeve 2 is lighter, when sleeve 2 fixed end 22 moves to conical surface 12 place of joint 11, flexible pipe is strutted by conical surface 12, the contact internal walls of flexible pipe and fixed end 22, because the internal diameter of fixed end 22 is greater than penetrate end 21, it is greater than the inner-diameter portion whose penetrating end 21 and is just being used on the softened part of tolerance sleeve 2, and the setting of sphenoid surface 23, sleeve 2 still can be twisted to connecting head 1 by the mode rotated and is connected with connecting head 1 by sleeve 2 easily, and when sleeve 2 is connected with connecting head 1, the sphenoid surface 23 of sleeve 2 inwall and the outer wall compact siro spinning technology of flexible pipe, flexible pipe is fixed, the fixed effect of flexible pipe is more firm, difficult drop-off.
Simultaneously in order to further strengthen the sealing of this novel hose connector, the utility model is also provided with a stuffing box gland 4, with reference to Fig. 1, one end of stuffing box gland 4 is sealedly attached in caulking groove 16, the body of stuffing box gland 4 is then placed between the fixed end outer wall of sleeve and caulking groove 16, because fixed end is for being threaded with joint, be threaded and easily there is gap, therefore at the other caulking groove 16 arranging annular in the side of threaded connection place, in one end of sleeve is sealedly attached to, the other end is placed on the outer wall of fixed end, thus make sleeve be wrapped in stuffing box gland 4 by the connection part of fixed end and joint, the structure of suit makes sealing surface effectively increase, and reach better sealing effect by the elastic reaction of stuffing box gland 4, and in order to avoid affecting the installation of flexible pipe, herein with reference to shown in Fig. 2, sealing cover 4 can be dug from inside to outside when flexible pipe is installed, turn over the opposite side to joint, turn back again after flexible pipe installs, thus reach enhanced leaktightness but do not affect flexible pipe install effect, above-mentioned stuffing box gland 4 is made for adopting rubber material, caulking groove 16 arranges the structure in interior band limited location, as being set to circular structure in reference Fig. 6, or as dovetail shaped, T-shaped shape also can, mainly better consider based on sealing drum fixed effect, certainly general groove structure also can, stuffing box gland 4 to be embedded in caulking groove 16 and is fixed with caulking groove 16 by bonding.
Comprehensive such scheme, the remarkable result of the phase of this novel hose connector hose coupling is than ever that sealing is high, Drop-proof, conveniently installs.
With reference to shown in Fig. 4, Fig. 5, the opposite side of described joint 11 its end relative is provided with the flanging 14 extended radially outwardly, when described sleeve 2 is connected with connecting head 1, the end of fixed end 22 and flanging 14 are fitted and are arranged, and the outer wall of the inwall of fixed end 22 near its end and joint 11 is fitted and arranged.Flanging 14 width arranged and the thickness of fixed end 22 just coincide; when sleeve 2 is connected with connecting head 1; the end wall of fixed end 22 is contacted at here; and the outer wall of the inwall of fixed end 22 and joint 11 is fitted; by the mode that end wall and the inwall of fixed end 22 are fitted with flanging 14, joint 11 outer wall respectively; the tightness at further this place of reinforcement; also the threaded connection place of available protecting sleeve 2 and joint 11; make its not with extraneous contact; effectively prevent its corrosion; prevent joint failure, strengthen the stability that it uses.
Further, the described inwall penetrating end 21 is provided with some annular grooves 24, penetrate some annulars that end 21 is arranged, when penetrating flexible pipe, due to the setting of groove 24, reduce the surface of contact with sleeve pipe, flexible pipe is pierced into more convenient, when hose coupling and flexible pipe come into operation, in flexible pipe, be full of fluid, by the pressure effect of fluid, and flexible pipe band is flexible, the part that flexible pipe is arranged in groove 24 sinks into groove 24 slightly by fluid pressure action, forms necessarily conflict with groove 24 wall, the fixation of reinforced hose, prevents flexible pipe from coming off further.
The outer wall of described sleeve 2 is provided with frosting, and the matte surface that flexible pipe is arranged strengthens sleeve 2 surface roughness, and make not easily to skid during installing sleeve 2, grip feeling is comfortable, facilitates the installation of sleeve 2.
The other end of described connecting head 1 opposing connections 11 is provided with ready-packaged joint 15, and ready-packaged joint 15 is standardized component, one end of connecting head 1 is arranged to the structure of ready-packaged joint 15, facilitates the installation of hose coupling and other part standard.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, all within design concept of the present utility model, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. a hose coupling, comprises the passage axially arranged in sleeve, connecting head and connecting head, it is characterized in that:
Described connecting head one end is provided with the joint for connecting hose, and the end of described joint is outward-dipping tapered structure, and the outer wall radial direction of described joint is provided with bulge loop, and the other end of described joint its end face relative is provided with outside thread;
Described sleeve comprises penetrating to be held and fixed end, penetrate end and fixed end lays respectively at the two ends of sleeve, fixed end inwall is provided with the internal thread mated with outside thread, the wall thickness of described fixed end is less than the wall thickness penetrating end, when described sleeve is connected with connecting head, position between the end of the inwall corresponding connection parts of sleeve and bulge loop is provided with sphenoid surface, and described sphenoid surface self-retaining end is obliquely installed to penetrating end, described in penetrate the gap being provided with between end with joint and penetrating for flexible pipe;
The side panel at the outside thread place place of described joint is also provided with the caulking groove of annular, and one end is sealedly attached to the stuffing box gland in caulking groove, and described stuffing box gland is placed between the outer surface of fixed end and caulking groove, and described caulking groove is made can be routed up from inside to outside by elastic material.
2. a kind of hose coupling according to claim 1, it is characterized in that: the opposite side of described joint its end relative is provided with the flanging extended radially outwardly, when described sleeve is connected with connecting head, the end of fixed end and flanging are fitted and are arranged, and the outer wall of the inwall of fixed end near its end and joint is fitted and arranged.
3. a kind of hose coupling according to claim 1 and 2, is characterized in that: described in penetrate end inwall be provided with some annular grooves.
4. a kind of hose coupling according to claim 3, is characterized in that: the outer wall of described sleeve is provided with frosting.
5. a kind of hose coupling according to claim 4, is characterized in that: the other end of described connecting head opposing connections is provided with ready-packaged joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420783634.4U CN204284748U (en) | 2014-12-11 | 2014-12-11 | A kind of hose coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420783634.4U CN204284748U (en) | 2014-12-11 | 2014-12-11 | A kind of hose coupling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204284748U true CN204284748U (en) | 2015-04-22 |
Family
ID=52867909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420783634.4U Active CN204284748U (en) | 2014-12-11 | 2014-12-11 | A kind of hose coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204284748U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322018A (en) * | 2016-11-10 | 2017-01-11 | 南京九致信息科技有限公司 | Adapter assembly capable of preventing hoses from shedding accidentally |
| CN113713494A (en) * | 2016-11-30 | 2021-11-30 | 东丽株式会社 | Water purifier |
| CN114544111A (en) * | 2022-04-21 | 2022-05-27 | 深圳市星芯顶科技有限公司 | Testing device for communication cable |
-
2014
- 2014-12-11 CN CN201420783634.4U patent/CN204284748U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322018A (en) * | 2016-11-10 | 2017-01-11 | 南京九致信息科技有限公司 | Adapter assembly capable of preventing hoses from shedding accidentally |
| CN113713494A (en) * | 2016-11-30 | 2021-11-30 | 东丽株式会社 | Water purifier |
| CN114544111A (en) * | 2022-04-21 | 2022-05-27 | 深圳市星芯顶科技有限公司 | Testing device for communication cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204284750U (en) | Novel hose connector | |
| CN205806474U (en) | A kind of pipeline connects sealing structure | |
| CN204300568U (en) | Waterproof anti-dropping type bellows joint member | |
| CN204284748U (en) | A kind of hose coupling | |
| CN205013929U (en) | Quick -operation joint and pipeline subassembly | |
| CN207334027U (en) | Pipeline clamp | |
| CN207989949U (en) | A kind of biting connecions pipe clamp connector | |
| CN203585681U (en) | Water pipe connector | |
| CN109458505A (en) | Pipeline clamp | |
| CN102494213A (en) | Out-wall joint and assembly method thereof for embedded metal hose | |
| KR101820939B1 (en) | Pipe freezing prevention apparatus | |
| CN207921556U (en) | The quick sealing rubber ring of circular hole take over road spigot-and-socket | |
| CN207298173U (en) | A kind of TBM pipelines quick coupling device | |
| CN216590461U (en) | Quick connector, assembly and special wrench connected with steel wire framework hose | |
| CN215111168U (en) | Sleeve connecting device and shaped universal water pipe for water supply appliance | |
| CN205991253U (en) | A kind of pipe joint | |
| CN205012416U (en) | Embedded type shower nozzle | |
| CN204647667U (en) | A kind of water knockout drum joint | |
| CN211083245U (en) | Spliced plastic pipeline convenient to assemble | |
| CN110107760B (en) | Corrugated pipe with sleeve self-locking function | |
| CN103453248A (en) | Anti-dropping hermetically-connecting structure of pipelines | |
| CN203404516U (en) | Anti-disengaging sealing connecting structure of pipeline | |
| CN207999557U (en) | A kind of connection structure for drain-pipe | |
| CN204829007U (en) | Socket joint pipeline | |
| CN205503031U (en) | Adapter sleeve for oil drilling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |