CN109347026A - A kind of self-tightening type plastic cord box line pipe interconnection method - Google Patents
A kind of self-tightening type plastic cord box line pipe interconnection method Download PDFInfo
- Publication number
- CN109347026A CN109347026A CN201811340420.9A CN201811340420A CN109347026A CN 109347026 A CN109347026 A CN 109347026A CN 201811340420 A CN201811340420 A CN 201811340420A CN 109347026 A CN109347026 A CN 109347026A
- Authority
- CN
- China
- Prior art keywords
- box
- spool
- wire box
- wire
- self
- 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
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/12—Distribution boxes; Connection or junction boxes for flush mounting
- H02G3/128—Distribution boxes; Connection or junction boxes for flush mounting in plinths, channels, raceways or similar
Abstract
The present invention discloses a kind of self-tightening type plastic cord box line pipe interconnection method, fix including wire box and wall-box connect with wire box fix-spool and wire box connection-Quick-action type elbow type box connect-the straight box of Quick-action type connects-Quick-action type elbow type box wire barrel and spool technique for fixing step, being inserted directly into box body can fix, the mounting box in narrow box body is not needed to connect, it installs more convenient, fixed effect is preferable, saves this link working hour, improves the efficiency of work；It does not need to install the more remaining box in wire box again to connect, wire box is made to simplify the structure, and a large amount of artificial and materials can be saved；Solve the problem of that site operation floor built-in line cassette bottom portion outlet pipe does not have connector；The position that spool is limited by stop collar in connector, when spool rotation in directly, small steel disc carves curved groove on spool, spool and will be directly secured together, can not directly extract, and does not need brushing glue, avoids personal injury caused by glue noxious material.
Description
Technical field
The present invention relates to wire box spool interconnection method technical fields, and in particular to a kind of self-tightening type plastic cord box line pipe docking
Method.
Background technique
In the home decoration, wire box is one of electrical accessories, because electric wire for decoration is across conduit, and in electricity
The joint area (for example route is long or conduit wants corner) of line just using terminal box as transition use, conduit with
Terminal box connects, and the electric wire inside spool links up in terminal box, plays the role of protecting electric wire and connects electric wire, this is just
Wire box, in the home decoration, terminal box is one of electrical accessories because electric wire for decoration be across conduit, and
The joint area (for example route is long or conduit wants corner) of electric wire is just used using terminal box as transition, conduit
It being connect with terminal box, the electric wire inside spool links up in terminal box, and play the role of protecting electric wire and connects electric wire, this
It is exactly terminal box, the connection between traditional plastic cord pipeline box has disadvantages that, requires PVC glue, spool connection first
Quality is brushed quality by pvc glue and is affected, secondly, needing to install tapered end fixed spool from tray interior, hand gos deep into wire box
Installation space is limited, installation is inconvenient.Because of above-mentioned reason, it is extra that pre-buried wire box is frequently necessary to reserve in four side walls of wire box
Traditional box connect, the pre-buried wire box of conventional floors, the spool of cassette bottom portion connection is using directly deep because lacking connecting bend all
The mode of wire box does not carry out any type of fixation, the case where falling off, spillage, to solve the above-mentioned problems, Wo Menti occurs
This self-tightening type plastic cord box line pipe interconnection method out.
Summary of the invention
The purpose of the present invention is to provide a kind of self-tightening type plastic cord box line pipe interconnection method, simple installations, with traditional box
It connects compared to that can be installed outside wire box, being inserted directly into box body can fix, and do not need the mounting box in narrow box body and connect, and pacify
Fill more convenient, fixed effect is preferable, saves this link working hour, improves the efficiency of work；It does not need to install in wire box again more
Extra box connects, and wire box is made to simplify the structure, and can save a large amount of artificial and materials；Quick-action type elbow type box connects, and solves
Site operation floor built-in line cassette bottom portion outlet pipe, does not have the problem of connector；Quick-action type directly solves the problems, such as to facilitate in-site installation, lead to
The position of spool can be limited by crossing stop collar in connector, will not be insecure because of the cause of fixed too short-range missile when docking spool, also not
Too many spool can be fixed to cause to waste, when spool is in directly interior rotation, small steel disc carves curved groove on spool, along steel disc
Installation direction is threaded into direct inside, and by spool be directly secured together, can not directly extract, not need to brush glue
Water avoids personal injury caused by glue noxious material.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of self-tightening type plastic cord box line pipe interconnection method, including wire box and wall fix-box connects and fixes-line with wire box
Pipe and wire box connection-Quick-action type elbow type box connect-and the straight box of Quick-action type connects-spool and spool technique for fixing step are specific to walk
It is rapid as follows:
(1) wire box is fixed with wall: wire box is fixedly mounted on the place that route in wall needs disagreement or steering；
(2) box connects fixes with wire box: box being connect to the inside for being mounted on wire box, facilitates the connection of spool and wire box；
(3) spool is connect with wire box: spool is connect by box and is fixed together with wire box
(4) Quick-action type elbow type box connects: being provided with guide bevel, limiting card, is mainly used for wire box bottom pore and spool
Docking；
(5) the straight box of Quick-action type connects: mainly with the installation docking of box side wall spool；
(6) spool is fixed with spool: using Quick-action type it is direct, be directly internally provided with small steel disc, mainly with spool it
Between rapid abutting joint.
Further improvement of the present invention scheme is: the distance between conducting wire oblique angle and limiting card described in step (4) are big
In the wall thickness for being equal to wire box.
Further improvement of the present invention scheme is: step (6) the small steel disc, is arranged symmetrically directly interior, oblique peace
Dress.
Further improvement of the present invention scheme is: spool described in step (5) includes guide bevel, and box connected guiding
Oblique angle enters inside wire box, and the upper end of the spool is provided with limiting card close to the side of guide bevel, and it is oblique that box connected guiding
Angle, limiting card are fixed on wire box side wall, and the limiting card is fixedly connected with spool, described to be fixedly connected with spool, described to lead
Quantity to oblique angle and limiting card is two groups, and guide bevel, limiting card are symmetrical about the centerline axis of spool, the line
Pipe is internally provided with deformation joint, and the deformation joint is fixedly connected with spool.
Further improvement of the present invention scheme is: step (6) the direct inner wall is provided with stop collar in connector, institute
It states stop collar in connector to be fixedly connected with spool, the inside of spool side of stop collar in connector is provided with small steel
Piece, the small steel disc are fixedly connected with spool, equal two groups of the quantity of stop collar in the connector, in the connector stop collar about
The centerline axis of spool is symmetrical, and the outer surface of the small steel disc is coated with erosion shield.
Further improvement of the present invention scheme is: step (1) described wire box one end outer surface is provided with wire box side and connects
Pore, wire box side adapter tube hole are fixedly connected with wire box, and the wire box bottom is provided with wire box bottom nozzles hole, the line
Box bottom nozzles hole is fixedly connected with wire box, and the quantity in wire box bottom nozzles hole is four groups, and wire box bottom nozzles hole is in
Rectangular array arrangement.
Further improvement of the present invention scheme is: box, which is provided with, between the guide bevel and limiting card connects limiting slot,
Box connects limiting slot as D1, and the height of the guide bevel and limiting card is D2, and one end of the spool is provided with port, the limit
Position card the distance away from port be D3, the spool with a thickness of D6.
Further improvement of the present invention scheme is: the height of stop collar is the thickness phase of D4, D4 and D6 in the connector
Together, the height that the small steel disc is entered inside directly is that the half of D5, D5 and D6 thickness is identical.
Further improvement of the present invention scheme is: the height of the deformation joint is D7, and the width of the limiting card is D8,
The direct diameter is D, D8 be greater than or wait with direct perimeter 1/8th, the width of the deformation joint is D9, D9 and D2 phase
Together.
Further improvement of the present invention scheme is: wire box wall thickness described in step (1) is D10.
Beneficial effects of the present invention:
(1) simple installation can be installed outside wire box compared with traditional box connects, and being inserted directly into box body can fix, no
The mounting box in narrow box body is needed to connect, installation is more convenient, and fixed effect is preferable, saves this link working hour, improves work
The efficiency of work.
(2) it does not need to install the more remaining box in wire box again to connect, so that wire box is simplified the structure, and a large amount of people can be saved
Work and material.
(3) Quick-action type elbow type box connects, and solves the problem of that site operation floor built-in line cassette bottom portion outlet pipe does not have connector.
(4) Quick-action type directly solves the problems, such as to facilitate in-site installation, and the position of spool can be limited by stop collar in connector,
Will not be insecure because of the cause of fixed too short-range missile when docking spool, too many spool will not be fixed and cause to waste, when spool is straight
When connecing interior rotation, small steel disc carves curved groove on spool, is threaded into direct inside along steel disc installation direction, and by spool
Be directly secured together, can not directly extract, do not need brush glue, avoid personal injury caused by glue noxious material.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of self-tightening type plastic cord box line pipe interconnection method flow chart of the present invention.
Fig. 2 is the side view that the straight box of Quick-action type connects in a kind of self-tightening type plastic cord box line pipe interconnection method of the present invention.
Fig. 3 is the cross-sectional view that the straight box of Quick-action type connects in a kind of self-tightening type plastic cord box line pipe interconnection method of the present invention.
Fig. 4 is the top view that the straight box of Quick-action type connects in a kind of self-tightening type plastic cord box line pipe interconnection method of the present invention.
Fig. 5 is the cross-sectional view that Quick-action type elbow type box connects in a kind of self-tightening type plastic cord box line pipe interconnection method of the present invention.
Fig. 6 is the side view that Quick-action type elbow type box connects in a kind of self-tightening type plastic cord box line pipe interconnection method of the present invention.
Fig. 7 is the top view that Quick-action type elbow type box connects in a kind of self-tightening type plastic cord box line pipe interconnection method of the present invention.
Fig. 8 is the direct side view of Quick-action type in a kind of self-tightening type plastic cord box line pipe interconnection method of the present invention.
Fig. 9 is the direct cross-sectional view of Quick-action type in a kind of self-tightening type plastic cord box line pipe interconnection method of the present invention.
Figure 10 is the direct top view of Quick-action type in a kind of self-tightening type plastic cord box line pipe interconnection method of the present invention.
Figure 11 is that a kind of self-tightening type plastic cord box line pipe interconnection method midline box of the present invention docks full-page proof cross-sectional view.
Figure 12 is a kind of self-tightening type plastic cord box line pipe interconnection method midline box side view of the present invention.
Figure 13 is a kind of self-tightening type plastic cord box line pipe interconnection method midline box top view of the present invention.
Fig. 2-13 attached drawing mark: 1, guide bevel；2, limiting card；3, deformation joint；4, stop collar in connector；5, small steel disc；
6, hole 7, wire box bottom nozzles hole are taken in wire box side.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figure 1, a kind of self-tightening type plastic cord box line pipe interconnection method, including wire box and wall fix-box connects and line
Box fixes-and spool and wire box connection-Quick-action type elbow type box connect-the straight box of Quick-action type connects-spool and spool technique for fixing
Step, the specific steps are as follows:
(1) wire box is fixed with wall: wire box is fixedly mounted on the place that route in wall needs disagreement or steering；
(2) box connects fixes with wire box: box being connect to the inside for being mounted on wire box, facilitates the connection of spool and wire box；
(3) spool is connect with wire box: spool is connect by box and is fixed together with wire box
(4) Quick-action type elbow type box connects: being provided with guide bevel, limiting card, is mainly used for wire box bottom pore and spool
Docking；
(5) the straight box of Quick-action type connects: mainly with the installation docking of box side wall spool；
(6) spool is fixed with spool: using Quick-action type it is direct, be directly internally provided with small steel disc, mainly with spool it
Between rapid abutting joint
Embodiment 2
As shown in Fig. 2-13, spool described in step (5) includes guide bevel 1, and box connected guide bevel 1 into wire box
The upper end of inside, the spool is provided with limiting card 2 close to the side of guide bevel 1, and box connected guide bevel 1, limiting card 2
It is fixed on wire box side wall, the limiting card 2 is fixedly connected with spool, and described 1 is fixedly connected with spool, the guide bevel 1
Quantity with limiting card 2 is two groups, and guide bevel 1, limiting card 2 are symmetrical about the centerline axis of spool, the spool
Be internally provided with deformation joint 3, the deformation joint 3 is fixedly connected with spool.
Further improvement of the present invention scheme is: step (6) the direct inner wall is provided with stop collar 4 in connector,
Stop collar 4 is fixedly connected with spool in the connector, and the inside of spool side of stop collar 4 in connector is provided with small
Steel disc 5, the small steel disc 5 are fixedly connected with spool, equal two groups of the quantity of stop collar 4 in the connector, limit in the connector
Ring 4 is symmetrical about the centerline axis of spool, and the outer surface of the small steel disc 5 is coated with erosion shield.
Further improvement of the present invention scheme is: step (1) described wire box one end outer surface is provided with wire box side and connects
Pore 6, wire box side adapter tube hole 6 are fixedly connected with wire box, and the wire box bottom is provided with wire box bottom nozzles hole 7, institute
It states wire box bottom nozzles hole 7 to be fixedly connected with wire box, the quantity in wire box bottom nozzles hole 7 is four groups, and wire box bottom connects
The arrangement of 7 rectangular array of pore.
Further improvement of the present invention scheme is: being provided with box between the guide bevel 1 and limiting card 2 and connects limit
Slot, it is D1 that box, which connects limiting slot, and the guide bevel 1 and the height of limiting card 2 are D2, and one end of the spool is provided with port,
The distance of the limiting card 2 away from port be D3, the spool with a thickness of D6.
Further improvement of the present invention scheme is: the height of stop collar 4 is the thickness phase of D4, D4 and D6 in the connector
Together, the height that the small steel disc 5 is entered inside directly is that the half of D5, D5 and D6 thickness is identical.
Further improvement of the present invention scheme is: the height of the deformation joint 3 is D7, and the width of the limiting card 2 is
D8, the direct diameter are D, D8 be greater than or wait with direct perimeter 1/8th, the width of the deformation joint 3 is D9, D9 with
D2 is identical.
Further improvement of the present invention scheme is: wire box wall thickness described in step (1) is D10.
The working principle of this self-tightening type plastic cord box line pipe interconnection method: straight with Quick-action type being connect using Quick-action type elbow box
When formula box connects, spool takes over hole and wire box bottom nozzles hole by wire box side and is inserted into wire box, then connects spool directly by box
It patches inside wire box, facilitates box to tap into inside wire box by guide bevel, capable limit is tapped into box by limiting card, is passed through
Box can be connect and is fixed on wire box side wall by the cooperation of guide bevel and limiting card, when direct using Quick-action type, pass through connector
Interior stop collar can limit the position of spool, and small steel disc carves curved groove on spool, be threaded into along steel disc installation direction
It is directly internal, and by spool be directly secured together.
Simple installation of the present invention can be installed outside wire box compared with traditional box connects, and being inserted directly into box body can fix,
It does not need the mounting box in narrow box body to connect, installation is more convenient, and fixed effect is preferable, saves this link working hour, improves
The efficiency of work；It does not need to install the more remaining box in wire box again to connect, so that wire box is simplified the structure, and a large amount of people can be saved
Work and material；Quick-action type elbow type box connects, and solves the problem of that site operation floor built-in line cassette bottom portion outlet pipe does not have connector；Fastly
Fast formula directly solves the problems, such as to facilitate in-site installation, the position of spool can be limited by stop collar in connector, when docking spool
Will not because fixed too short-range missile cause it is insecure, too many spool will not be fixed and cause to waste, when spool directly in rotation when, it is small
Steel disc carves curved groove on spool, is threaded into direct inside along steel disc installation direction, and by spool be directly anchored to
Together, it can not directly extract, not need to brush glue, avoid personal injury caused by glue noxious material.
The above content is just an example and description of the concept of the present invention, affiliated those skilled in the art
It makes various modifications or additions to the described embodiments or is substituted in a similar manner, without departing from invention
Design or beyond the scope defined by this claim, be within the scope of protection of the invention.
Claims (10)
1. a kind of self-tightening type plastic cord box line pipe interconnection method, it is characterised in that: fix including wire box and wall-box connects and line
Box fixes-and spool and wire box connection-Quick-action type elbow type box connect-the straight box of Quick-action type connects-spool and spool technique for fixing
Step, the specific steps are as follows:
(1) wire box is fixed with wall: wire box is fixedly mounted on the place that route in wall needs disagreement or steering；
(2) box connects fixes with wire box: box being connect to the inside for being mounted on wire box, facilitates the connection of spool and wire box；
(3) spool is connect with wire box: spool is connect by box and is fixed together with wire box
(4) Quick-action type elbow type box connects: being provided with guide bevel, limiting card, is mainly used for pair of wire box bottom pore and spool
It connects；
(5) the straight box of Quick-action type connects: mainly with the installation docking of box side wall spool；
(6) spool is fixed with spool: it is direct using Quick-action type, it is directly internally provided with small steel disc, mainly between spool
Rapid abutting joint.
2. a kind of self-tightening type plastic cord box line pipe interconnection method according to claim 1, it is characterised in that: step (4) institute
The distance between conducting wire oblique angle and limiting card for stating are more than or equal to the wall thickness of wire box.
3. a kind of self-tightening type plastic cord box line pipe interconnection method according to claim 1, it is characterised in that: step (6) institute
Small steel disc is stated, is arranged symmetrically directly interior, it is diagonally-installed.
4. a kind of self-tightening type plastic cord box line pipe interconnection method according to claim 1, it is characterised in that: step (5) institute
The spool stated includes guide bevel (1), and box was connected guide bevel (1) and entered inside wire box, and the upper end of the spool is close to lead
It being provided with limiting card (2) to the side of oblique angle (1), box connected guide bevel (1), limiting card (2) is fixed on wire box side wall,
The limiting card (2) is fixedly connected with spool, and (1) is fixedly connected with spool, the guide bevel (1) and limiting card (2)
Quantity be two groups, and guide bevel (1), limiting card (2) are symmetrical about the centerline axis of spool, the inside of the spool
It is provided with deformation joint (3), the deformation joint (3) is fixedly connected with spool.
5. a kind of self-tightening type plastic cord box line pipe interconnection method according to claim 1, it is characterised in that: step (6) institute
It states direct inner wall to be provided with stop collar in connector (4), stop collar (4) is fixedly connected with spool in the connector, the spool
Inside be provided with small steel disc (5) side of stop collar (4) in connector, the small steel disc (5) is fixedly connected with spool, institute
Equal two groups of quantity for stating stop collar in connector (4), stop collar (4) is symmetrical about the centerline axis of spool in the connector, described
The outer surface of small steel disc (5) is coated with erosion shield.
6. a kind of self-tightening type plastic cord box line pipe interconnection method according to claim 1, it is characterised in that: step (1) institute
It states wire box one end outer surface and is provided with wire box side adapter tube hole (6), wire box side adapter tube hole (6) is fixedly connected with wire box,
The wire box bottom is provided with wire box bottom nozzles hole (7), and wire box bottom nozzles hole (7) is fixedly connected with wire box, described
The quantity in wire box bottom nozzles hole (7) is four groups, and wire box bottom nozzles hole (7) rectangular array is arranged.
7. a kind of self-tightening type plastic cord box line pipe interconnection method according to claim 4, it is characterised in that: the guiding is oblique
It is provided with box between angle (1) and limiting card (2) and connects limiting slot, it is D1, the guide bevel (1) and limiting card that box, which connects limiting slot,
(2) height is D2, and one end of the spool is provided with port, and the distance of the limiting card (2) away from port is D3, the spool
With a thickness of D6.
8. a kind of self-tightening type plastic cord box line pipe interconnection method according to claim 5, it is characterised in that: in the connector
The height of stop collar (4) is that the thickness of D4, D4 and D6 are identical, and the small steel disc (5) direct internal height of entering is D5, D5 with
The half of D6 thickness is identical.
9. a kind of self-tightening type plastic cord box line pipe interconnection method according to claim 4, it is characterised in that: the deformation joint
(3) height is D7, and the width of the limiting card (2) is D8, and the direct diameter is D, and D8 is greater than or waits and direct perimeter
1/8th, the width of the deformation joint (3) is D9, and D9 is identical as D2.
10. a kind of knife with three edges according to claim 1, it is characterised in that: wire box wall thickness described in step (1) is D10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811340420.9A CN109347026A (en) | 2018-11-12 | 2018-11-12 | A kind of self-tightening type plastic cord box line pipe interconnection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811340420.9A CN109347026A (en) | 2018-11-12 | 2018-11-12 | A kind of self-tightening type plastic cord box line pipe interconnection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109347026A true CN109347026A (en) | 2019-02-15 |
Family
ID=65314769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811340420.9A Pending CN109347026A (en) | 2018-11-12 | 2018-11-12 | A kind of self-tightening type plastic cord box line pipe interconnection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109347026A (en) |
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| CN1590828A (en) * | 2004-06-17 | 2005-03-09 | 章根友 | Connecting structure of pipes |
| KR20090130819A (en) * | 2008-06-16 | 2009-12-24 | 김경복 | Joint fx |
| CN202402874U (en) * | 2011-11-28 | 2012-08-29 | 北华航天工业学院 | Self-threading type co-diameter pipe joint |
| CN202884304U (en) * | 2012-11-04 | 2013-04-17 | 孔凡荣 | Plastic combining structure for metal pipes |
| CN206023108U (en) * | 2016-08-17 | 2017-03-15 | 海宁市许村镇顺昌五金厂 | Novel line pipe joint |
| CN206401827U (en) * | 2016-10-19 | 2017-08-11 | 北京欧康科技有限公司 | A kind of novel flame-retardant insulation disjunctor spool and its connector and pipe connecting piece |
| CN108700240A (en) * | 2016-01-14 | 2018-10-23 | Ccg大洋洲控股有限公司 | The tubular corner of angle adjustable |
-
2018
- 2018-11-12 CN CN201811340420.9A patent/CN109347026A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1590828A (en) * | 2004-06-17 | 2005-03-09 | 章根友 | Connecting structure of pipes |
| KR20090130819A (en) * | 2008-06-16 | 2009-12-24 | 김경복 | Joint fx |
| CN202402874U (en) * | 2011-11-28 | 2012-08-29 | 北华航天工业学院 | Self-threading type co-diameter pipe joint |
| CN202884304U (en) * | 2012-11-04 | 2013-04-17 | 孔凡荣 | Plastic combining structure for metal pipes |
| CN108700240A (en) * | 2016-01-14 | 2018-10-23 | Ccg大洋洲控股有限公司 | The tubular corner of angle adjustable |
| CN206023108U (en) * | 2016-08-17 | 2017-03-15 | 海宁市许村镇顺昌五金厂 | Novel line pipe joint |
| CN206401827U (en) * | 2016-10-19 | 2017-08-11 | 北京欧康科技有限公司 | A kind of novel flame-retardant insulation disjunctor spool and its connector and pipe connecting piece |
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Application publication date: 20190215 |