CN110836297A - Hose connector and collision connecting method for repairing old pipeline - Google Patents
Hose connector and collision connecting method for repairing old pipeline Download PDFInfo
- Publication number
- CN110836297A CN110836297A CN201810934551.3A CN201810934551A CN110836297A CN 110836297 A CN110836297 A CN 110836297A CN 201810934551 A CN201810934551 A CN 201810934551A CN 110836297 A CN110836297 A CN 110836297A
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- inner core
- hoop
- hose
- core
- groove
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 23
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 239000002657 fibrous material Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 17
- 238000010276 construction Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229920006231 aramid fiber Polymers 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
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- 238000009941 weaving Methods 0.000 description 1
Images
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
- F16L33/00—Arrangements for connecting hoses to rigid members; Rigid hose connectors, i.e. single members engaging both hoses
- F16L33/02—Hose-clips
Abstract
According to the invention, a hose connector is proposed, comprising: the inner core is constructed into a tubular inner core with a central pore passage, and a plurality of inner core clamping grooves are arranged on the outer wall of the inner core and are symmetrically distributed about the central cross section of the inner core; the hoop is used for being mounted on the inner core to press and connect the hose, the hoop is constructed to comprise at least two hoop bodies with the same petal structures, and the hoop bodies can be fastened and connected through fasteners; the inner wall of the hoop body is provided with a plurality of hoop clamping grooves matched with the inner core clamping grooves, and the hose is pressed between the inner core clamping grooves and the hoop clamping grooves. The invention also provides a butt joint method for repairing an old pipeline by using the hose connector.
Description
Technical Field
The invention relates to the technical field of trenchless repair of pipelines, in particular to a hose connector. The invention also relates to a butt joint method for repairing an old pipeline by using the hose connector.
Background
The high-pressure continuous composite hose comprises a three-layer structure of an inner liner layer, an outer protection layer and a reinforcing layer. The inner liner layer and the outer protective layer are made of polyurethane, polyethylene or other high polymer materials, and the reinforcing layer is made of polyester industrial filaments, aramid fibers or other fiber reinforcing materials. The high-pressure continuous composite hose has high pressure-bearing capacity, and products with different pressure-bearing capacities can be prepared by optimizing the type, weaving mode and thickness of the reinforcing layer material according to different working conditions. At present, the pipe is mainly applied to the fields of fire water conveying, shale gas development fracturing fluid conveying and the like. Meanwhile, the pipe has the characteristics of high bearing performance, good temperature resistance, long single pipe, good bending performance, reusability and the like, and is widely applied to the field of trenchless restoration of old pipelines. Various hoses need to be connected in a sealing and fastening mode in the using process, and in the prior art, hose joints are usually used for connection. However, the prior art hose connector has many problems in practical use. For example, when a hose joint is used in a ground formation, the operation is difficult and the construction efficiency is low. And conventional hose nipple is mostly through threaded connection, and the leakproofness and the stability of hose connection department can't effectively be guaranteed to this kind of threaded connection structure, and it leads to hose nipple sealing performance to reduce because of becoming flexible easily in the use, and then can lead to the gas or the liquid in the hose to reveal.
In addition, the trenchless repairing technology for the old pipeline adopts proper pipes or anticorrosive materials, and the old pipeline is repaired through the lining of the original pipeline under the condition of no or little excavation of the earth surface, so that the purpose of prolonging the service life of the pipeline is achieved. At present, common trenchless repairing methods for old pipelines include an in-situ curing method, a PE (polyethylene) in-pipe inserting method and a pipeline coating curing method. The non-excavation repair technology for the old pipeline has the advantages of environmental protection, concealed process, high construction efficiency, low cost and the like, so that the application prospect is wide. At present, the maximum construction distance of one time of the in-situ curing method is 0.3 km; the maximum construction distance of one time of the PE in-pipe penetration method is 1.2km, and the elbow with the elbow less than or equal to 1.5D needs to be subjected to independent pipe breaking treatment. The maximum construction distance of the pipeline coating and curing method is 1.5km once, but the construction quality control difficulty is large, and the application range is limited.
At present, the technology for repairing the old pipeline of the hose lining is in a just starting stage. Most of hose joints used for repairing old pipelines of hose linings in the prior art have the hidden trouble problems of complex structure, high processing and manufacturing cost, poor safety performance, unstable connection of broken old pipelines, running, overflowing, dripping, leaking and the like of media conveyed in the pipelines at the joint.
Disclosure of Invention
In view of the above technical problems, the present invention is directed to a hose connector, which can effectively ensure a tight connection between the hose connector and a hose through a clamping groove structure, and can effectively ensure a sealing performance of the hose at a connection position. Meanwhile, the hose joint is simple in structure, low in price, safe, reliable, reusable, simple and convenient to operate and capable of remarkably improving the installation efficiency of hose connection.
The invention also provides a method for repairing the end-to-end connection of an old pipeline, which uses the hose connector. The method for repairing the old pipeline by using the collision connection can effectively ensure that the connection effect of the broken pipe of the old pipeline is stable and reliable, and is simple and rapid to operate and high in construction efficiency.
To this end, according to a first aspect of the invention, a hose connector is proposed, comprising: the inner core is constructed into a tubular inner core with a central pore passage, and a plurality of inner core clamping grooves are arranged on the outer wall of the inner core and are symmetrically distributed about the central cross section of the inner core; the hoop is used for being mounted on the inner core to press and connect the hose, the hoop is constructed to comprise at least two hoop bodies with the same petal structures, and the hoop bodies can be fastened and connected through fasteners; the inner wall of the hoop body is provided with a plurality of hoop clamping grooves matched with the inner core clamping grooves, and the hose is pressed between the inner core clamping grooves and the hoop clamping grooves.
In a preferred embodiment, a protrusion is arranged in the middle of the inner core, and the inner core clamping groove comprises a first inner core groove and a plurality of second inner core grooves, wherein the first inner core groove is arranged at two ends of the protrusion and extends radially inwards, and the second inner core grooves are axially outside the first inner core groove and are uniformly distributed along the axial direction.
In a preferred embodiment, the first core groove is formed in a rectangular shape in cross section, and the second core groove is formed in a trapezoidal shape in cross section.
In a preferred embodiment, two ends of the inner core are chamfered, and the chamfers are arranged to form an obtuse angle from inside to outside.
In a preferred embodiment, the number of the second core grooves is not less than 6.
In a preferred embodiment, the hoop clamping groove is configured to include a first hoop protrusion matched with the first inner core groove, and a plurality of second hoop protrusions matched with the second inner core groove.
In a preferred embodiment, the hoop body is provided with mounting holes for mounting the fasteners to fasten the hoop body.
According to a second aspect of the present invention, there is provided a butt connection method for repairing an old pipe using the hose connector as described above, characterized by comprising the steps of:
installing the hose connector at the connection of the old pipe;
arranging a sleeve at the joint of the old pipeline, and placing the hose joint in the sleeve;
filling the sleeve with a sealing mixture to form a seal at the joint of the old pipe;
and after the sealing mixture is solidified, performing anticorrosion and heat preservation treatment on the joint of the old pipeline.
In a preferred embodiment, the sleeve is provided with an injection hole for filling the sealing compound.
In a preferred embodiment, the sealing compound is a mixture of an epoxy resin and a fibrous material.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described below with reference to the accompanying drawings.
Fig. 1 shows the structure of a hose coupler according to the present invention.
Fig. 2 and 3 show the structure of the inner core in the hose connector shown in fig. 1.
Fig. 4 and 5 show the construction of the anchor ear in the hose connector shown in fig. 1.
Fig. 6 is a schematic view showing a coupling structure of a butt coupling method for repairing an old pipe using a hose coupler according to the present invention.
In the present application, the drawings are all schematic and are used only for illustrating the principles of the invention and are not drawn to scale.
Detailed Description
The invention is described below with reference to the accompanying drawings.
Fig. 1 shows the structure of a hose coupler 100 according to the present invention. As shown in fig. 1, the hose coupler 100 includes an inner core 110. The inner core 110 is configured in a tubular shape, and the inner core 110 is provided with a central bore 115, the central bore 115 being for conveying a gaseous or liquid medium. The tubular inner core 110 has a simple structure, is easy to install and connect, and can ensure effective circulation at the pipe joint.
Fig. 2 and 3 show the structure of the inner core 110 in the hose coupler 100 according to the present invention. As shown in fig. 2 and 3, a plurality of core slots are formed on the outer wall of the core 110. The plurality of core pockets are symmetrically distributed about a central cross-section of the core 110. The inner core slots are uniformly spaced from the middle of the inner core 110 to the two ends, and include a first inner core slot 111 and a second inner core slot 112. In the embodiment shown in fig. 2 and 3, a cylindrical protrusion protruding radially outward is provided at the middle of the inner core 110, a first inner core groove 111 is provided at each of both ends of the cylindrical protrusion, the first inner core groove 111 is recessed radially inward along the cylindrical protrusion, and the cross-sectional shape of the first inner core groove 111 is set to be rectangular. A plurality of second inner core grooves 112 are respectively formed on the axial outer sides of the inner core 110 at the two ends of the cylindrical protrusion. According to the present invention, the number of the second core recesses 112 at one end of the core 110 is not less than 3. For example, in the embodiment shown in fig. 2 and 3, 4 second core grooves 112 are provided on the axially outer side of the inner core 110 at the end of the cylindrical protrusion. The second core grooves 112 are uniformly spaced apart in the axial direction, the cross-sectional shape of the second core grooves 112 is a trapezoid, and the short base of the trapezoid is the base of the second core grooves 112. In one embodiment, the trapezoid is arranged as an isosceles trapezoid. Thus, a plurality of core catching grooves are formed on the core 110 by the first core groove 111 and the second core groove 112. The core slots are adapted to fit with anchor ear slots (mentioned below) in the hose anchor ear to tightly connect the hose 130.
In this embodiment, both ends of the inner core 110 are chamfered, and the chamfers are configured to be obtuse angles from the inside to the outside at the ends. This structure of the inner core 110 can reduce the flow resistance of the medium in the hose at the hose connector 100, and improve the connection effect of the hose connector 100.
According to the present invention, the hose connector 100 further comprises a hoop 120 for pressing the connection hose 130. In one embodiment, hose 130 is a high pressure continuous composite hose. In the embodiment shown in fig. 3, the hoop 120 is constructed in a three-piece construction and is fastened by fasteners. The hoop 120 is cylindrical and includes a hoop body 125 with the same three-piece structure. It is understood, of course, that the hoop 120 may be configured in a two-piece, four-piece, or other multi-piece configuration. The hoop body 125 is provided with a mounting hole 126 for mounting a fastener to be fastened and mounted on the inner core 110, so that the high-pressure continuous composite hose 130 is pressed between the inner core clamping groove and the hoop clamping groove to be tightly connected with the hose connector 100. In one embodiment, the fastener may be a hose hoop bolt and nut assembly.
In the present embodiment, the mounting holes 126 are provided at the circumferential connection of the hoop body 125. As shown in fig. 3, the mounting hole 126 extends in a direction perpendicular to a radial direction of the hoop body 125, and a distance from a center line of the mounting hole 126 to a center line of the installed hoop 120 is greater than an inner diameter of the hoop 120 and smaller than an outer diameter of the hoop 120. In the illustrated embodiment, two axially spaced mounting holes are provided at the radial connection of the hoop body 125. Therefore, four mounting holes are formed in each hoop body 125. When the hose connector 100 is connected and installed, the installation holes on the two adjacent sections of the hoop bodies 125 are correspondingly installed, and the fasteners are installed in the installation holes 126, so that the hoop 120 and the inner core 110 are pressed on the high-pressure continuous composite hose.
According to the present invention, a plurality of hoop slots are provided on the inner wall of the hoop 120. As shown in fig. 1 and 4, the hoop engaging groove is configured to be a concave-convex engaging groove structure that can be matched with the inner core engaging groove, and includes a first hoop protrusion 121 and a plurality of second hoop protrusions 122. The first hoop protrusion 121 is disposed at one end of the hoop body 125, and the cross-sectional shape of the first hoop protrusion 121 is rectangular and is adapted to the first inner core groove 111 of the inner core 110. The plurality of second hoop protrusions 122 are disposed on the axial inner side of the first hoop protrusion 121 and are distributed at equal intervals along the axial direction. The second hoop protrusions 122 have a trapezoidal cross-sectional shape, which is adapted to the second core protrusions 112 of the core 110. In one embodiment, 4 second hoop protrusions 122 are provided on the inner wall of the hoop 120. In the actual installation process of the hose connector 100, when the hoop 120 and the inner core 110 are fastened and installed by the fastening member 126, the first inner core groove 111 and the second inner core groove 112 on the inner core 110 are respectively engaged with the first hoop protrusion 121 and the second hoop protrusion 122 on the hoop 120 to compress the high-pressure continuous composite hose 130, so that the hose connector 100 and the high-pressure continuous composite hose 130 are tightly connected. The structure of the inner core clamping groove and the hoop clamping groove can especially ensure the stability and the sealing property of the connection between the hose connector 100 and the high-pressure continuous composite hose 130, and the hose connector 100 is simple and convenient to install and operate, thereby being beneficial to improving the installation efficiency of the connection of the high-pressure continuous composite hose 130.
During installation and connection, two sections of high-pressure continuous composite hoses 130 to be connected are respectively sleeved at the inner core clamping grooves at two ends of the inner core 110 of the hose connector 100, two ends of the inner core 110 are respectively provided with one hoop 120, the hoop clamping grooves on the hoops 120 are engaged with the inner core clamping grooves on the inner core 110 for installation, and the hoops 120 are fastened through fasteners, so that the high-pressure continuous composite hoses 130 are tightly connected.
According to the hose connector 100 of the present invention, the tight connection between the hose connector 100 and the high-pressure continuous composite hose 130 is effectively ensured by the concave-convex groove structure, and the sealing performance at the connection position of the high-pressure continuous composite hose 130 is effectively ensured. Meanwhile, the hose connector 100 has the advantages of simple structure, low price, safety, reliability, reusability and simple and convenient operation, and can remarkably improve the installation efficiency of the connection of the high-pressure continuous composite hose 130.
In another aspect of the present invention, a method of repairing an old pipe 140 using the hose coupler 100 according to the present invention is provided.
Fig. 6 is a schematic view showing a coupling structure of a butt coupling method for repairing an old pipe using a hose coupler according to the present invention. The process of repairing an old pipe using the hose coupler 100 according to the present invention is briefly described below by means of fig. 6.
First, the hose connector 100 is installed at the broken portion of the old pipe, and the high-pressure continuous composite hoses 130 in the old pipe 140 are respectively fitted over both ends of the inner core 110 of the hose connector 100. Then, the anchor ear 120 is fittingly installed on the inner core 110, and the anchor ear 120 is fastened to fasten and press-fit the high-pressure continuous composite hose 130, thereby achieving the connection. The stability and the sealing performance of the joint of the old pipeline are effectively ensured under the matching installation action of the inner core 110 and the hoop 120. Thereafter, the sleeve 50 is placed over the joint of the old pipe 140 and the hose joint 100 is placed within the sleeve 50. The side wall of the sleeve is provided with a grease injection hole 51 for filling and injecting sealing mixture 52 into the annular space between the sleeve 50 and the pipeline, and the sealing of the joint of the old pipeline is realized after the sealing mixture 52 is solidified. When the sealing compound 52 solidifies, the grease injection hole 51 is closed. Thus, the sealing performance of the old pipeline joint can be further ensured. Finally, the joint of the old pipeline 140 is subjected to subsequent treatment, such as external corrosion protection treatment and heat preservation treatment, so that the repair effect and the connection tightness of the joint of the old pipeline are further enhanced. Thereby, the repaired connection of the old pipe 140 is completed.
In one embodiment, the sealing compound 52 is a mixture of epoxy and short fibers. Preferably, the short fiber is one or more of fiber reinforced materials such as glass fiber, carbon fiber, aramid fiber and polyester industrial filament, and the length of the short fiber is not more than 5 mm.
The butt joint method for repairing an old pipe with a lining according to the present invention effectively ensures the fastening and sealing performance of the joint of the old pipe by using the hose joint 100 according to the present invention. And by placing the sleeve 50 with the hose connector 100 in the sleeve 50, the sealing compound 52 is injected into the annular space between the sleeve 50 and the old pipe 140, further enhancing the sealing performance at the connection between the old pipe and the old pipe. Meanwhile, the joint of the old pipeline 140 is subjected to external anti-corrosion treatment and heat preservation treatment, so that the repair effect and the connection tightness of the joint of the old pipeline are effectively guaranteed. In addition, the hose connector 100 and the sleeve 50 are simple in structure, low in price, safe, reliable, and recyclable, and the hose connector 100 enables quick connection between the high-pressure continuous composite hoses 130. Meanwhile, according to the method for repairing the old pipeline by using the lining, the stable and reliable connecting effect of the repaired broken pipe can be effectively ensured, and the hidden danger problems of 'running, overflowing, dripping, leaking' and the like of the pipe conveying medium at the hose joint can be effectively avoided.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and do not limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A hose coupler (100) comprising:
a tubular inner core (110) configured with a central bore (115), a plurality of inner core slots being provided on the outer wall of the inner core, which are symmetrically distributed about the central cross-section of the inner core;
a hoop (120) for mounting on the inner core to compress a connection hose (130), the hoop being configured to include a hoop body (125) having at least two identical lobes, the hoop body being fastenable by fasteners;
the inner wall of the hoop body is provided with a plurality of hoop clamping grooves matched with the inner core clamping grooves, and the hose is pressed between the inner core clamping grooves and the hoop clamping grooves.
2. The hose connector according to claim 1, wherein the inner core has a protrusion at the middle portion, and the inner core locking groove comprises a first inner core groove (111) disposed at both ends of the protrusion and extending radially inward, and a plurality of second inner core grooves (112) axially outward of the first inner core groove and uniformly distributed in the axial direction.
3. The hose coupling of claim 2, wherein the first core groove is formed in a rectangular cross-sectional shape and the second core groove is formed in a trapezoidal cross-sectional shape.
4. A hose connector according to any one of claims 1 to 3, wherein the inner core is chamfered at both ends, and the chamfer is provided at an obtuse angle from the inside to the outside.
5. The hose coupling according to any one of claims 2 to 4, wherein the number of the second core grooves is not less than 6.
6. The hose connector according to any one of claims 1 to 5, characterized in that the hoop clamping groove is configured to comprise a first hoop protrusion (121) adapted to the first core groove, and a plurality of second hoop protrusions (122) adapted to the second core groove.
7. The hose coupling according to claim 6, characterized in that the anchor ear body is provided with mounting holes (126) for mounting the fasteners to fasten the anchor ear body.
8. A method of repairing a butt connection of a used pipe (140) using a hose connector according to any one of claims 1 to 7, comprising the steps of:
installing the hose connector at the connection of the old pipe;
-providing a sleeve (50) at the joint of the old pipe and placing the hose joint inside the sleeve;
filling the sleeve with a sealing compound (52) to form a seal at the joint of the old pipe;
and after the sealing mixture is solidified, performing anticorrosion and heat preservation treatment on the joint of the old pipeline.
9. The method of claim 8, wherein the sleeve is provided with an injection hole (51) for filling the sealing compound.
10. The method of claim 8 or 9, wherein the sealing compound is a mixture of epoxy resin and fiber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810934551.3A CN110836297A (en) | 2018-08-16 | 2018-08-16 | Hose connector and collision connecting method for repairing old pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810934551.3A CN110836297A (en) | 2018-08-16 | 2018-08-16 | Hose connector and collision connecting method for repairing old pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN110836297A true CN110836297A (en) | 2020-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810934551.3A Pending CN110836297A (en) | 2018-08-16 | 2018-08-16 | Hose connector and collision connecting method for repairing old pipeline |
Country Status (1)
| Country | Link |
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| CN (1) | CN110836297A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113803546A (en) * | 2021-08-13 | 2021-12-17 | 宁波联润流体机械制造有限公司 | Fast-insertion hose connector with good sealing performance |
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|---|---|---|---|---|
| CN113803546A (en) * | 2021-08-13 | 2021-12-17 | 宁波联润流体机械制造有限公司 | Fast-insertion hose connector with good sealing performance |
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