CN203718250U

CN203718250U - Pipeline joint with disengagement prevention function

Info

Publication number: CN203718250U
Application number: CN201420071156.4U
Authority: CN
Inventors: 武峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-02-19
Filing date: 2014-02-19
Publication date: 2014-07-16
Anticipated expiration: 2024-02-19

Abstract

The utility model relates to a pipe fitting. A pipeline joint with a disengagement prevention function comprises a hollow plastic casing, wherein the plastic casing is provided with an interface end, and the interface end is provided with a threaded embedding element made of metal. The pipeline joint is characterized by also comprising a metal disengagement prevention sleeve, one end of the metal disengagement prevention sleeve is embedded in the end surface of the interface end, the disengagement prevention sleeve divides the interface end into an inner ring and an outer ring, the threaded embedding element is provided with a step, the outer end of the disengagement prevention sleeve is fixedly connected with a stop ring, the radial inner end of the stop ring is in lap joint on the step, the stop ring is fixedly connected with the threaded embedding element, and the inner ring is positioned in a space defined by the threaded embedding element, the disengagement prevention sleeve and the stop ring. The utility model aims at providing the pipeline joint with the disengagement prevention function and with the advantages that the disengagement phenomenon cannot easily occur between the embedding element and a plastic case, and the problem that the embedding element and the plastic case in the existing pipeline joint can be separated during heat expansion and cold retraction is solved.

Description

There is the pipe coupling of anti-drop function

Technical field

The utility model relates to pipe fitting, relates in particular to a kind of pipe coupling with anti-drop function.

Background technique

Pipeline is a kind of conventional article.The connection of pipeline realizes by pipe coupling.China Patent No. be 201120485894X, notice of authorization day are July 11 in 2012 day, in being called the patent documentation of " a kind of insulation feedwater piping and insulation water supply piping system ", a kind of pipeline is disclosed.The material of making pipe coupling has a lot, wherein the pipe coupling of plastic material lightweight owing to having, can, by corrosion, low cost and other advantages, not apply very extensively weary.

The pipe coupling of plastic material has threaded and not threaded two kinds of structural types.Not threaded pipe coupling is by with glue, pipe coupling being connected and sealed together with pipe bonding, and this Placement exists the deficiency that can not dismantle.Threaded pipe coupling has overcome the not non-removable deficiency of threaded permanent joint, but because the intensity of plastics is lower, threaded pipe coupling easily produces in assembly process the phenomenon being torn.In China Patent No., be 2008200849386, notice of authorization day be February 14 in 2009 day, be called in the patent documentation of " water pipe adapter " and disclose a kind of threaded pipe coupling.

In order to overcome the deficiency being easily torn in threaded pipe coupling assembly process, designed the pipe coupling of threaded inserts.The basic structure form of the pipe coupling of threaded inserts, for the interface end interlocking inserts in pipe coupling, inserts adopt on Design of Screw Thread that metallic material (being generally copper) was made, the connected use inner peripheral surface or outer circumferential face at inserts, produces and tears phenomenon while avoiding connecting.In China Patent No., be 2007100696821, within open day, be that the patent document that November 28 in 2007, day, were called " water pipe adapter " discloses a kind of pipe coupling that is provided with threaded insert.

But the existing pipe coupling that is provided with threaded insert has the following disadvantages: because the expansion coefficient of metal and plastics is inconsistent, time generation layering break-off between metal and plastics while expanding with heat and contract with cold, causes inserts to come off or the joint of plastics and metal produces leakage phenomenon; During connection, by interface end end face (parts of plastics), contact, and plastics are because hardness is low, are easily scratched and occur unevenly, produce that both to have affected planarization attractive in appearance, while also causing docking after uneven poor; During use, inserts inner peripheral surface bare area is large, easily produces corrosion phenomena, and for fear of producing corrosion phenomena, inserts can only adopt the metallic material that is not easy corrosion to make as copper, makes to make the kind generic restriction of the material of inserts.

Model utility content

First object of the present utility model aims to provide the pipe coupling with anti-drop function that is not easy to produce break-off between a kind of inserts and plastic casing, solved can be separated while expanding with heat and contract with cold between inserts in existing pipe coupling and plastic casing problem.

The pipe coupling with anti-drop function that second object of the present utility model contacts by metalwork while being intended to further to provide a kind of connection on the basis of first object, the poor problem of planarization while having solved existing pipe coupling docking.

The little pipe coupling with anti-drop function of inserts internal surface bare area when the 3rd object of the present utility model is intended to further to provide a kind of use on the basis of first object, has solved existing pipe coupling large and problem of the easy corrosion that causes of inserts internal surface exposed part area while using.

Above technical problem solves by following technical proposal: a kind of pipe coupling with anti-drop function, the plastic casing that comprises hollow, described plastic casing is provided with interface end, described interface end is provided with the threaded insert that metal is made, it is characterized in that, also comprise that one end is embedded the metal anti-avulsion cover in described interface end end face, described anti-avulsion cover is divided into inner ring and outer ring by described interface end, described threaded insert is provided with step, the outer end of described anti-avulsion cover is connected with baffle ring, the radial inner end of described baffle ring is overlapped on described step, described baffle ring and described threaded insert are fixed together, described inner ring is positioned at described threaded insert, in the space that anti-avulsion cover and baffle ring surround.Because anti-avulsion cover is fixed together to play with threaded insert, hold interface section tightly effect on threaded insert, when expanding with heat and contract with cold, cause interface end when producing separation trend between inserts, make the threaded insert can not be separated with interface end.

As preferably, the inner of described anti-avulsion cover is provided with along the barb of anti-avulsion cover bent radial.Can effectively prevent that anti-avulsion cover from coming off from interface end vertically.

As preferably, described barb is along the bending of anti-avulsion cover radially outward.In working process, plastics can conveniently enter between anti-avulsion cover and threaded insert unobstructedly, thereby play the effect that improves production convenience.Anti-avulsion cover produces outer while moving the power coming off, barb can produce along the footpath of threaded insert, inwardly push away inner ring power and now because threaded insert is supported in inner ring, so inner ring is not easy to produce cracked phenomenon, therefore Drop-proof is effective.

As preferably, described anti-avulsion cover and threaded insert are fixed together by bonding or friction tight mode.Convenient and firm during connection, especially friction tight means of fixation is more convenient and reliable.

As preferably, described baffle ring protrudes from the end face of described outer ring.During connection, be that the end face by baffle ring contacts, realized second goal of the invention.

As preferably, described threaded insert interior edge face is provided with the annular capillary groove circumferentially extending along threaded insert, and described housing is provided with the falling-resistant ring being filled in described capillary groove.While expanding with heat and contract with cold, the inner of inserts is with also not producing segregation phenomenon between shell, thereby can effectively prevent leakage phenomenon.

As preferably, described housing is provided with the lining that simultaneously covers described threaded insert interior edge face and inner peripheral surface, and described lining and described housing are structure as a whole.Can reduce the bare area of inserts internal surface while using, realize the 3rd goal of the invention.

As preferably, described threaded insert is inner screw thread insert, and the span between the screw thread on described lining and described threaded insert is less than 2 millimeters.If lining has covered on screw thread, represent that the span between the screw thread on lining and described threaded insert is negative.In the time of can either making inserts use the bare area of internal surface little, can not interfere again the use of the screw thread in inserts.

Preferred as another, described threaded insert is external screw thread insert, and the length of described lining is the more than 1/2nd of described threaded insert length.Can take into account the convenience while making.

As preferably, the length of described anti-avulsion inserting incoming interface end is the more than 1/2nd of length of described anti-avulsion cover.Can improve anti-avulsion cover with the connection effect of interface end.

The utlity model has following advantage: by anti-avulsion cover, interface end is held tightly on threaded insert, while expanding with heat and contract with cold, inserts is not easy come off or separately, connect reliable and leakage-preventing effective from shell; One end of anti-avulsion cover is embedded in interface end, and the connection reliability between interface end and anti-avulsion cover is good; Anti-avulsion Analysis of Nested Design baffle ring and be fixed in threaded insert, can prevent that threaded insert is with producing and relatively move between anti-avulsion cover, the reliability while having improved anticreep; Baffle ring is connected on step, convenient while threaded insert being overlapped to relative being fixed together with anti-avulsion in working process; By making baffle ring protrude from interface end end face, can improve the planarization while connecting; By the lining covering with inserts internal surface is set, can delay the corrosion of inserts internal surface.

Accompanying drawing explanation

Fig. 1 is the utility model embodiment one schematic diagram.

Fig. 2 is the utility model embodiment two schematic diagram.

Fig. 3 is the utility model embodiment three schematic diagram.

Fig. 4 is the utility model embodiment four schematic diagram.

Fig. 5 is the utility model embodiment five schematic diagram.

The schematic diagram of another mode of execution of press-offing till Fig. 6.

In figure: span L3, the length L 4 of lining, threaded insert length L 5 between the screw thread on the length L 1 of the screw thread 23 on the bottom surface 211 of the end face 1121 of housing 1, interface end 11, inner ring 111, outer ring 112, outer ring, lining 12, falling-resistant ring 13, threaded insert 2, step 21, step, capillary groove 22, threaded insert, the screw thread 24 on threaded insert, anti-avulsion cover 3, barb 31, baffle ring 32, anti-avulsion inserting incoming interface end, length L 2, lining and the threaded insert of anti-avulsion cover.

Embodiment

Below in conjunction with accompanying drawing and embodiment, the utility model is further described.

Embodiment one, and referring to Fig. 1, a kind of pipe coupling with anti-drop function, comprises plastic casing 1, anti-avulsion cover 3 and the threaded insert 2 of hollow.

Plastic casing 1 is provided with interface end 11.The inside of interface end 11 is provided with lining 12 and falling-resistant ring 13.The outer end of interface end 11 is provided with inner ring 111 and outer ring 112.Interface end 11, inner ring 111, outer ring 112, lining 12 and falling-resistant ring 13 5 are structure as a whole.

Anti-avulsion cover 3 is embedded between inner ring 111 and outer ring 112, be also that inner ring 111 and outer ring 112 are split to form by anti-avulsion cover 3.Anti-avulsion cover 3 is made for metal./ 2nd of a length L 2 of press-offing till the length L 1 of anti-avulsion inserting incoming interface end.The inner of anti-avulsion cover 3 is provided with along the barb 31 of retaining cover radially outward bending.Barb 31 is loop configuration.The outer end of anti-avulsion cover 3 is provided with baffle ring 32.Press-off till baffle ring 32 3 outer end bends inwards and forms.Baffle ring 32 protrudes from the end face 1121 of outer ring.

Threaded insert 2 is made by metal.Threaded insert 2 is inner screw thread insert.Threaded insert 2 is embedded at interface end 11.The outer surface of threaded insert 2 is provided with step 21.Step 21 and threaded insert 2 link together in the mode of integrative-structure.The radial inner end of baffle ring 32 is overlapped on step 21.Baffle ring 32 and threaded insert 2 are fixed together, certainly by gluing between first step and baffle ring, are bonded together and be also fine by friction tight mode.Inner ring 111 is filled the space that full threaded insert 2, anti-avulsion cover 3 and baffle ring 32 surround.Threaded insert 2 interior edge faces are provided with capillary groove 22.Capillary groove 22 is the circular groove circumferentially extending along threaded insert 2.Falling-resistant ring 13 is filled in capillary groove 22.Falling-resistant ring 13 is sealed connected together with capillary groove 22.Lining 12 covers the inner of interior edge face and the internal surface of threaded insert 2.Span L3 between screw thread on lining and threaded insert equals 2 millimeters.

Embodiment two, referring to Fig. 2, are: the span between the screw thread 23 on lining 12 and threaded insert equals 0 with embodiment one difference.7/8ths of the length L 2 of press-offing till the length L 1 of anti-avulsion inserting incoming interface end.

Embodiment three, referring to Fig. 3, with embodiment two difference, are: threaded insert 2 is external screw thread insert.The length L 4 of lining is 1/2nd of threaded insert length L 5.The diameter of the cylinder at 211 places, bottom surface of step is equal and coaxial with the large footpath of the screw thread 24 on threaded insert.

Embodiment four, referring to Fig. 4, with embodiment three difference, are: the length of lining 12 and threaded insert 2 equal in length.

Embodiment five, referring to Fig. 5, with embodiment four difference, are: the diameter of the cylinder at 21 places, bottom surface of step 21 is greater than the large footpath of the screw thread 24 on threaded insert and coaxial.Convenience in the time of can improving assembling.

In above each embodiment, barb is all loop configuration, and certainly as shown in Figure 6, barb 31 can be designed as a plurality of, and overlaps 3 circumferential distribution along anti-avulsion.

Claims

1. a pipe coupling with anti-drop function, the plastic casing that comprises hollow, described plastic casing is provided with interface end, described interface end is provided with the threaded insert that metal is made, it is characterized in that, also comprise that one end is embedded the metal anti-avulsion cover in described interface end end face, described anti-avulsion cover is divided into inner ring and outer ring by described interface end, described threaded insert is provided with step, the outer end of described anti-avulsion cover is connected with baffle ring, the radial inner end of described baffle ring is overlapped on described step, described baffle ring and described threaded insert are fixed together, described inner ring is positioned at described threaded insert, in the space that anti-avulsion cover and baffle ring surround.

2. the pipe coupling with anti-drop function according to claim 1, is characterized in that, the inner of described anti-avulsion cover is provided with along the barb of anti-avulsion cover bent radial.

3. the pipe coupling with anti-drop function according to claim 2, is characterized in that, described barb is along the bending of anti-avulsion cover radially outward.

4. according to the pipe coupling with anti-drop function described in claim 1 or 2 or 3, it is characterized in that, described anti-avulsion cover and threaded insert are fixed together by bonding or friction tight mode.

5. according to the pipe coupling with anti-drop function described in claim 1 or 2 or 3, it is characterized in that, described baffle ring protrudes from the end face of described outer ring.

6. according to the pipe coupling with anti-drop function described in claim 1 or 2 or 3, it is characterized in that, described threaded insert interior edge face is provided with the annular capillary groove circumferentially extending along threaded insert, and described housing is provided with the falling-resistant ring being filled in described capillary groove.

7. according to the pipe coupling with anti-drop function described in claim 1 or 2 or 3, it is characterized in that, described housing is provided with the lining that simultaneously covers described threaded insert interior edge face and inner peripheral surface, and described lining and described housing are structure as a whole.

8. the pipe coupling with anti-drop function according to claim 7, is characterized in that, described threaded insert is inner screw thread insert, and the span between the screw thread on described lining and described threaded insert is less than 2 millimeters.

9. the pipe coupling with anti-drop function according to claim 7, is characterized in that, described threaded insert is external screw thread insert, and the length of described lining is the more than 1/2nd of described threaded insert length.

10. according to the pipe coupling with anti-drop function described in claim 1 or 2 or 3, it is characterized in that, the length of described anti-avulsion inserting incoming interface end is the more than 1/2nd of length of described anti-avulsion cover.