CN110307436A - A kind of PVC pipeline tail portion end-sealing device - Google Patents

A kind of PVC pipeline tail portion end-sealing device Download PDF

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Publication number
CN110307436A
CN110307436A CN201910626740.9A CN201910626740A CN110307436A CN 110307436 A CN110307436 A CN 110307436A CN 201910626740 A CN201910626740 A CN 201910626740A CN 110307436 A CN110307436 A CN 110307436A
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China
Prior art keywords
plectane
pressure
pipeline
tail
sealing
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CN201910626740.9A
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CN110307436B (en
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周纯
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周纯
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10Means for stopping flow from or in pipes or hoses
    • F16L55/11Plugs

Abstract

The present invention provides a kind of PVC pipeline tail portion end-sealing device, including pipeline body and tail end end socket, tail end end socket is mounted on the tail portion of pipeline body, tail end end socket includes managing outer potential dividing ring, annular slot, sealing ring pad and the interior deformation of pipe to divide mechanism, the outer surface of the inner wall and pipeline body of managing outer potential dividing ring is socketed, the surface of outer potential dividing ring and the inner wall grafting of annular slot are managed, PVC pipeline field is related to.The plugging structure of PVC pipeline tail portion end-sealing device design can act on simultaneously inside and outside pipeline, by the effect of the impact force enhancing sealing of water flow and the tightness of connection, the impact force of Multilevel partial-pressure decrease structure, service life extends, it simultaneously can quick detaching structure by simple mode, to which the general end socket of effective solution needs to bear biggish impact force when in use, the ability that force part disperses pressure is poor, the case where being easy to happen leakage, and end socket damage is affected to pipeline, it has not been convenient to the problem of encapsulating again.

Description

A kind of PVC pipeline tail portion end-sealing device
Technical field
The present invention relates to PVC pipeline technical field, specially a kind of PVC pipeline tail portion end-sealing device.
Background technique
PVC pipeline be processed into produce during to be processed into both ends be in perforation shape, facilitate pipeline by attachment device with The connection docking of other pipelines, also facilitates to the unimpeded water delivery of pipeline, have in the duct some pipelines be as main pipeline, can be at it Surface, which is connected to several, to be in charge of and carries out to different directions water delivery, this main pipeline needs to fix one for blocking in tail end at this time End-sealing device, currently used end-sealing device is mainly one and opens wide and be similarly the pipeline of PVC material, it is close with main pipeline Envelope docking, this pipeline need to bear the impact of water flow in use, and the terminal of pipeline is born always when in use Surge, so the end socket of pipeline needs whether frequent maintenance leaks, since current connection type is more dead Plate is not bolted, and is exactly to pass through welding or strength glue sticking, out of question in the short time, uses end socket for a long time Damage can be damaged together with pipeline, and just extremely inconvenient when encapsulation again, general end socket needs when in use Bear biggish impact force, the ability that force part disperses pressure is poor, the case where being easy to happen leakage, and end socket damage is to pipe Road is affected, it has not been convenient to encapsulate again, so needing a kind of PVC pipeline tail portion end-sealing device.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of PVC pipeline tail portion end-sealing device, general envelope is solved Head needs to bear when in use biggish impact force, and the ability that force part disperses pressure is poor, is easy to happen leakage Situation, and end socket damage is affected to pipeline, it has not been convenient to the problem of encapsulating again.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: a kind of PVC pipeline tail portion end socket dress It sets, including pipeline body and tail end end socket, the tail end end socket is mounted on the tail portion of pipeline body, and the tail end end socket includes pipe Outer potential dividing ring, annular slot, sealing ring pad and in managing deformation divide mechanism, the inner wall of the outer potential dividing ring of the pipe and pipeline body Outer surface is socketed, the surface of the outer potential dividing ring of the pipe and the inner wall grafting of annular slot, and deformation partial pressure mechanism is located in the pipe The inside of pipeline body.
Preferably, deformation partial pressure mechanism includes pressure plectane, gas transmission steel in the plectane that meets water, back pressure plectane, two in the pipe Pipe, three sections of corrugated steel tubes, rotation is restricted and cavity limiting mechanism, and the material of plectane is pressed in the plectane that meets water, back pressure plectane and two Material includes spring steel, and pressure plectane is in side recess side convex shape in the plectane that meets water, back pressure plectane and two, and two Medium pressure plectane is described to meet water between plectane and middle pressure plectane and back pressure plectane between back pressure plectane and the plectane that meets water It is provided between middle pressure plectane between elasticity partial pressure chamber, two medium pressure plectanes and flexible extrusion chamber is set, it is described defeated Gas steel pipe and three sections of corrugated steel tubes are integrally formed, and the surface of the plectane that meets water, back pressure plectane and middle pressure plectane is provided with axis It holds, the surface of the gas transmission pipe is fixedly connected with the inner ring of bearing, and three sections of corrugated steel tubes are located at two elasticity point The surface of the inside for pressing chamber and elastic extrusion chamber, the corrugated steel tube inside the elastic extrusion chamber offers inflating port.
Preferably, the surface that the corrugated steel tube in intracavitary portion is divided positioned at elasticity is fixedly connected with one end of rotation rope, described The surface of rotation rope is fixedly connected with several solid partial pressure steel balls, and the convex of plectane is pressed in two in the convex surface of the plectane that meets water Face and the convex surface of back pressure plectane are provided with center circular groove, press plectane in the surface of the plectane that meets water, back pressure plectane and two Surface be fixedly connected with the inner wall of sealing ring pad, the surface of the sealing ring pad is fixedly connected with two sections of elastic packing rubber Pad, two sections of elastic packing rubber pads are located at the inside of two different elasticity partial pressure chambers, and the annular slot opens up On the concave face of back pressure plectane.
Preferably, the material of the outer potential dividing ring of the pipe includes stainless steel, and the side view of the outer potential dividing ring of the pipe is in circular ring shape The cross-sectional view of shape, the outer potential dividing ring of the pipe is V-shaped, and the material of the gas transmission pipe and three sections of corrugated steel tubes includes spring Steel, the surface of bearing are socketed with sealing shroud, the concave face and water slug direction face of the plectane that meets water, the back pressure plectane Concave face faces the outside of pipeline body, and the raised face of the back pressure plectane and the raised face for the plectane that meets water face two respectively The raised face of a middle pressure plectane.
Preferably, the cavity limiting mechanism is located at the inside of elastic extrusion chamber, and the cavity limiting mechanism includes rubber Ball, solid steel ball and partial pressure spring, the solid steel ball are located at the inside of ball, the both ends for dividing spring respectively with reality The surface of heart steel ball is fixedly connected with the inner wall of ball, and the surface inserting of the ball has several balls, several institutes The spacing distance stated between ball is identical, and the ball, solid steel ball and partial pressure spring inside cavity limiting mechanism on the one hand can To play the role of sharing pressure, another aspect solid steel ball can prevent to press plectane that excessive deformation occurs in two, several Spacing distance between the ball is identical, and ball, which can play, facilitates ball in intracavitary movement.
Preferably, the surface of the gas transmission pipe is fixedly connected with limited change, and the surface of the limit change is threaded with One end of caging bolt, the caging bolt is threadedly coupled with the surface of back pressure plectane.
(3) beneficial effect
(1) internal diameter of tail end end socket self-adapting pipe ontology when in use of the invention snaps onto the interior of pipeline body Portion, the plectane that meets water meet water impact, and water impact is bigger, and the plectane that meets water, back pressure plectane and middle pressure plectane deformation degree are got over Greatly, the shape guidance by the plectane that meets water, back pressure plectane and middle pressure plectane, pressure can towards transmitting on the inner wall of pipeline body, Sealing structure is less susceptible to fall off, while the unstable structure in pipe in deformation partial pressure mechanism can also play deformation and share pressure Effect, on the one hand can play that water flow is bigger, connection it is just all the more close, leakproofness is stronger, and another aspect Multilevel partial-pressure avoids Local pressure.
(2) present invention is by being arranged outer potential dividing ring, and deformation partial pressure mechanism will drive outer point in pipe when deformation occurs Deformation occurs is pressed downward for the inner ring of pressure ring, and the inner ring of outer potential dividing ring is pressed downward meeting so that outer potential dividing ring and pipeline body appearance surface cover The part connect more tightly downwards pressing against pipeline body, on the one hand in pipe deformation partial pressure mechanism match common extrusion pipe Ontology can prevent inside and outside pipeline that there is a situation where booster generations for discontinuity, on the other hand can play by deformation pressure Reinforcement is closely connect with pipeline body.
(3) present invention is when needing to take out plugging structure, it is only necessary to cut off the water, plugging structure not by water flow pressure, Outer potential dividing ring is taken out out of annular slot, then making the interior partial pressure deformation mechanism of pipe by inner inflatable, deformation occurs, specifically That deformation occurs is contrary for deformation and water impact pressure, and elastic extrusion chamber expands so that middle pressure plectane extruding force decrease, and in Deformation occurs can squeeze solid partial pressure steel ball for pressure plectane, and solid partial pressure steel ball will meet water plectane and backwater plectane squeezes inclination, crowded Pressure weakens, and directly takes out plugging structure.
(4) plugging structure that designs of the present invention inside and outside pipeline while can act on, by the impact force enhancing of water flow The effect of sealing and the tightness of connection, Multilevel partial-pressure weaken the impact force of structure, and service life extends, while by simple Mode can quick detaching structure, so that the general end socket of effective solution needs to bear biggish punching when in use Hit power, the ability that force part disperses pressure is poor, the case where being easy to happen leakage, and end socket damage is affected to pipeline, The problem of inconvenience encapsulates again.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention;
Fig. 2 is tail end end enclosure structure cross-sectional view of the present invention;
Fig. 3 is schematic enlarged-scale view at A in Fig. 2 of the present invention;
Fig. 4 is cavity limiting mechanism cross-sectional view of the present invention.
Wherein, interior deformation is managed in 1 pipeline body, 2 tail end end sockets, 21 outer potential dividing rings, 22 annular slots, 23 sealing ring pads, 24 Partial pressure mechanism, 241 meet water plectane, 242 back pressure plectanes, plectane, 244 gas transmission pipes, 245 corrugated steel tubes, 246 rotations are pressed in 243 Rope, 247 cavity limiting mechanisms, 2471 balls, 2472 solid steel balls, 2473 partial pressure springs, 2474 balls, 248 elasticity partial pressures Chamber, 249 elastic extrusion chambers, 2410 inflating ports, 2411 solid partial pressure steel balls, 2412 center circular grooves, 2413 elastic packing rubber pads, 3 limit changes, 4 caging bolts.
Specific embodiment
Below in conjunction with attached drawing of the invention, technical scheme in the embodiment of the invention is clearly and completely described, Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the scope of protection of the invention.
As shown in Figs 1-4, the embodiment of the present invention provides a kind of PVC pipeline tail portion end-sealing device, including pipeline body 1 and tail End seal head 2, tail end end socket 2 are mounted on the tail portion of pipeline body 1, tail end end socket 2 include manage outer potential dividing ring 21, annular slot 22, Deformation divides mechanism 24 in sealing ring pad 23 and pipe, manages the outer surface socket of the inner wall and pipeline body 1 of outer potential dividing ring 21, and pipe is outer The inside that interior deformation partial pressure mechanism 24 is located at pipeline body 1, pipe are managed in the inner wall grafting on the surface of potential dividing ring 21 and annular slot 22 The material of outer potential dividing ring 21 includes stainless steel, and the side view for managing outer potential dividing ring 21 is in annulus shape, manages the section view of outer potential dividing ring 21 Scheme V-shaped.
Deformation partial pressure mechanism 24 is including pressing plectane 243, gas transmission steel in the plectane 241 that meets water, back pressure plectane 242, two in managing 244, three sections of corrugated steel tubes 245 of pipe, rotation rope 246 and cavity limiting mechanism 247, the plectane 241 that meets water, back pressure plectane 242 and two The material of a middle pressure plectane 243 includes spring steel, and pressure plectane 243 is in the plectane 241 that meets water, back pressure plectane 242 and two Side is recessed side convex shape, and pressure plectane 243 is located at back pressure plectane 242 between the plectane 241 that meets water in two, and meet water plectane 241 concave face and water slug direction face, the concave face of back pressure plectane 242 face the outside of pipeline body 1, back pressure plectane The raised face of 242 raised face and the plectane 241 that meets water faces the raised face that plectane 243 is pressed in two respectively, and meet water plectane 241 It is provided between middle pressure plectane 243 and between back pressure plectane 242 and middle pressure plectane 243 in elasticity partial pressure 248, two, chamber Flexible extrusion chamber 249 is set between pressure plectane 243, and gas transmission pipe 244 and three sections of corrugated steel tubes 245 are integrally formed, and meet water circle The surface of plate 241, back pressure plectane 242 and middle pressure plectane 243 is provided with bearing, the surface of gas transmission pipe 244 and bearing it is interior Circle is fixedly connected, and the material of gas transmission pipe 244 and three sections of corrugated steel tubes 245 includes spring steel, and the surface of bearing is socketed with close Big envelope, three sections of corrugated steel tubes 245 are located at the inside of two elasticity partial pressure chambers 248 and elastic extrusion chamber 249, are located at elasticity and squeeze The surface of corrugated steel tube 245 inside pressure chamber 249 offers inflating port 2410, and the surface of gas transmission pipe 244 is fixedly connected limited Change 3, the surface of limit change 3 are threaded with caging bolt 4, one end of caging bolt 4 and the surface screw thread of back pressure plectane 242 Connection.
The surface of corrugated steel tube 245 inside elasticity partial pressure chamber 248 is fixedly connected with one end of rotation rope 246, is revolved The surface for turning rope 246 is fixedly connected with several solid partial pressure steel balls 2411, and plectane is pressed in two in the convex surface for the plectane 241 that meets water 243 convex surface and the convex surface of back pressure plectane 242 are provided with center circular groove 2412, the surface for the plectane 241 that meets water, back pressure plectane 242 and two in press the surface of plectane 243 to be fixedly connected with the inner wall of sealing ring pad 23, the surface of sealing ring pad 23 is fixed to be connected Two sections of elastic packing rubber pads 2413 are connected to, two sections of elastic packing rubber pads 2413 are located at two different elasticity partial pressure chambers 248 inside, annular slot 22 are provided on the concave face of back pressure plectane 242.
Cavity limiting mechanism 247 is located at the inside of elastic extrusion chamber 249, cavity limiting mechanism 247 include ball 2471, Solid steel ball 2472 and partial pressure spring 2473, solid steel ball 2472 are located at the inside of ball 2471, divide the two of spring 2473 End is fixedly connected with the inner wall on the surface of solid steel ball 2472 and ball 2471 respectively, if the surface inserting of ball 2471 has A ball 2474 is done, the spacing distance between several balls 2474 is identical.
In use, cutting off the water inside pipeline body 1, deformation partial pressure mechanism 24 in pipe is tucked into the inside of pipeline body 1, outside Potential dividing ring 21 is inserted into inside annular slot 22, and the surface of 21 inner wall of outer potential dividing ring and pipeline body 1 is socketed, sealing ring pad 23 It is fitted in elastic packing rubber pad 2413 on the inner wall of pipeline body 1, rotates gas transmission pipe 244, gas transmission pipe 244 drives rotation Turning 246 winding of rope, rotation rope 246 drives solid partial pressure steel ball 2411 to ramp up and suit and enters in center circular groove 2412, Then caging bolt 4 is threadedly coupled with back pressure plectane 242, in 1 inside water flowing of pipeline body, water impact meets water plectane 241, It meets water and 241 stress and deformation of plectane and pressure, middle pressure plectane 243 pressure is transmitted to middle pressure plectane 243 by solid partial pressure steel ball 2411 Contract elastic extrusion chamber 249, and middle pressure plectane 243 squeezes back pressure plectane 242,242 He of back pressure plectane by solid partial pressure steel ball 2411 The middle pressure equal deformation of plectane 243 simultaneously tightly presses sealing ring pad 23 and pressure is passed to the inner wall of pipeline body 1 from inside, with The back pressure plectane 242 of this concurrent deformation squeezes outer potential dividing ring 21, and the inner wall of outer potential dividing ring 21 is tightly pressed down against pipeline body 1 Outer surface cut off the water inside pipeline body 1 when needing to separate in device, outer potential dividing ring 21 and annular slot 22 are divided From, it is only necessary to caging bolt 4 is separated with back pressure plectane 242, rotates gas transmission pipe 244, solid partial pressure steel ball 2411 hangs folded It is added in elasticity partial pressure 248 bottom of chamber, by gas transmission pipe 244 and inflating port 2410 to elastic 249 inner inflatable of extrusion chamber, cavity Limiting mechanism 247 expands deformation reduction to the pressure of sealing ring pad 23 from inside to outside, while the middle pressure plectane 243 expanded is by folding The solid partial pressure steel ball 2411 added squeezes inclination in will meet water plectane 241 and back pressure plectane 242 of the bottom of elasticity partial pressure chamber 248, Back pressure plectane 242 and the plectane 241 that meets water weaken 23 pressure of sealing ring pad, then can easily take out device, thus complete At the use process of entire PVC pipeline tail portion end-sealing device.

Claims (6)

1. a kind of PVC pipeline tail portion end-sealing device, it is characterised in that: including pipeline body (1) and tail end end socket (2), the tail End seal head (2) is mounted on the tail portion of pipeline body (1), and the tail end end socket (2) includes managing outer potential dividing ring (21), annular slot (22), sealing ring pad (23) and the interior deformation of pipe divide mechanism (24), the inner wall of the outer potential dividing ring (21) of the pipe and pipeline body (1) Outer surface socket, the inner wall grafting on the surface of the outer potential dividing ring (21) of the pipe and annular slot (22), deformation point in the pipe Press mechanism (24) is located at the inside of pipeline body (1).
2. a kind of PVC pipeline tail portion end-sealing device according to claim 1, it is characterised in that: deformation divides in the pipe Mechanism (24) is including pressing plectane (243), gas transmission pipe (244), three sections in the plectane (241) that meets water, back pressure plectane (242), two Corrugated steel tube (245), rotation rope (246) and cavity limiting mechanism (247), the plectane that meets water (241), back pressure plectane (242) With two in press plectane (243) material include spring steel, in the plectane that meets water (241), back pressure plectane (242) and two Press plectane (243) in side recess side convex shape, two medium pressure plectanes (243) are located at back pressure plectane (242) and meet Between water plectane (241), between the plectane that meets water (241) and middle pressure plectane (243) and back pressure plectane (242) and middle pressure circle It is provided between plate (243) between elasticity partial pressure chamber (248), two medium pressure plectanes (243) and flexible extrusion chamber is set (249), the gas transmission pipe (244) and three sections of corrugated steel tubes (245) are integrally formed, the plectane that meets water (241), back pressure plectane (242) and the surface of middle pressure plectane (243) is provided with bearing, and the surface of the gas transmission pipe (244) and the inner ring of bearing are solid Fixed connection, three sections of corrugated steel tubes (245) are located at the interior of two elasticity partial pressures chamber (248) and elasticity extrusion chamber (249) Portion, the surface for being located at the internal corrugated steel tube (245) of the elastic extrusion chamber (249) offer inflating port (2410).
3. a kind of PVC pipeline tail portion end-sealing device according to claim 2, it is characterised in that: be located at elasticity partial pressure chamber (248) surface of internal corrugated steel tube (245) is fixedly connected with one end of rotation rope (246), the table of the rotation rope (246) Face is fixedly connected with several solid partial pressure steel balls (2411), and plectane is pressed in two in the convex surface of the plectane that meets water (241) (243) convex surface on convex surface and back pressure plectane (242) is provided with center circular groove (2412), the table of the plectane that meets water (241) The surface of plectane (243) is pressed to be fixedly connected with the inner wall of sealing ring pad (23) in face, back pressure plectane (242) and two, it is described The surface of sealing ring pad (23) is fixedly connected with two sections of elastic packing rubber pads (2413), two sections of elastic packing rubber pads (2413) it is located at the inside of two different elasticity partial pressures chamber (248), the annular slot (22) is provided with back pressure plectane (242) on concave face.
4. a kind of PVC pipeline tail portion end-sealing device according to claim 3, it is characterised in that: the outer potential dividing ring of the pipe (21) material includes stainless steel, and the side view of the outer potential dividing ring (21) of the pipe is in annulus shape, the outer potential dividing ring (21) of the pipe Cross-sectional view it is V-shaped, the material of the gas transmission pipe (244) and three sections of corrugated steel tubes (245) includes spring steel, bearing Surface is socketed with sealing shroud, the concave face and water slug direction face of the plectane that meets water (241), the back pressure plectane (242) Concave face face the outside of pipeline body (1), the raised face of the back pressure plectane (242) and the plectane (241) that meets water it is prominent Appear to face the raised face that plectane (243) are pressed in two respectively.
5. a kind of PVC pipeline tail portion end-sealing device according to claim 4, it is characterised in that: the cavity limiting mechanism (247) it is located at the inside of elastic extrusion chamber (249), the cavity limiting mechanism (247) includes ball (2471), solid steel ball (2472) and partial pressure spring (2473), the solid steel ball (2472) are located at the inside of ball (2471), the partial pressure spring (2473) both ends are fixedly connected with the inner wall on the surface of solid steel ball (2472) and ball (2471) respectively, the ball (2471) surface inserting has several balls (2474), and the spacing distance between several described balls (2474) is identical.
6. a kind of PVC pipeline tail portion end-sealing device according to claim 1, it is characterised in that: the gas transmission pipe (244) Surface be fixedly connected limited change (3), it is described limit change (3) surface be threaded with caging bolt (4), the limit spiral shell One end of bolt (4) is threadedly coupled with the surface of back pressure plectane (242).
CN201910626740.9A 2019-07-11 2019-07-11 PVC pipeline afterbody head device Active CN110307436B (en)

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Application Number Priority Date Filing Date Title
CN201910626740.9A CN110307436B (en) 2019-07-11 2019-07-11 PVC pipeline afterbody head device

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Application Number Priority Date Filing Date Title
CN201910626740.9A CN110307436B (en) 2019-07-11 2019-07-11 PVC pipeline afterbody head device

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CN110307436B CN110307436B (en) 2021-06-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112944096A (en) * 2021-02-05 2021-06-11 陈琼 Pipeline end socket device for energy-saving and environment-friendly equipment

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US20130048130A1 (en) * 2011-08-22 2013-02-28 Philip L. Lundman Dual inflatable plug assembly
CN103174907A (en) * 2013-03-21 2013-06-26 中国华冶科工集团有限公司 Pipeline built-in sealing device
CN203847907U (en) * 2014-05-19 2014-09-24 永新电气设备有限公司 Flexible blocking device for pipeline
EP2793011A1 (en) * 2013-04-05 2014-10-22 Ipm S.R.L. Testing system for the operation of the tightness seal and bell of a pvc-type plastic material pipe, obtained by a forming process with integrated seal
CN205824474U (en) * 2016-07-21 2016-12-21 傅迪 Buckle-type pipe end socket
CN208753934U (en) * 2018-07-25 2019-04-16 国家电网有限公司 A kind of seal for pipe joints plug

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201293164Y (en) * 2008-10-27 2009-08-19 上海梅山钢铁股份有限公司 Quickly connecting and plugging pipe joint
US20130048130A1 (en) * 2011-08-22 2013-02-28 Philip L. Lundman Dual inflatable plug assembly
CN103174907A (en) * 2013-03-21 2013-06-26 中国华冶科工集团有限公司 Pipeline built-in sealing device
EP2793011A1 (en) * 2013-04-05 2014-10-22 Ipm S.R.L. Testing system for the operation of the tightness seal and bell of a pvc-type plastic material pipe, obtained by a forming process with integrated seal
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112944096A (en) * 2021-02-05 2021-06-11 陈琼 Pipeline end socket device for energy-saving and environment-friendly equipment

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