CN2463648Y

CN2463648Y - Sealing connecting piece for plastic pipeline

Info

Publication number: CN2463648Y
Application number: CN 01207093
Authority: CN
Inventors: 纪耀宗
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-02-22
Filing date: 2001-02-22
Publication date: 2001-12-05
Anticipated expiration: 2011-02-22

Abstract

The utility model discloses a sealing connecting piece for plastic pipelines, which comprises a joint with an internal thread and a joint with an external thread. An O-shaped sealing ring is arranged between the joints. The joint with the internal thread can be composed of a pipe joint and an insert with the internal thread, and the joint with the external thread can be composed of a pipe joint and an insert with the external thread. The pipeline connecting piece can be a connecting piece which has a through, a three-way, a four-way or a telescoped pipeline. The sealing connecting piece for plastic pipelines has strict sealing and can not leak. Because the insert with the internal thread and the insert with the external thread are made from engineering plastic, the mechanical strength of the insert is similar with common copper materials, and the expense is only one fifth of common copper materials. Therefore, the cost is low, the plastic dose not need electroplating, and the sealing connecting piece for plastic pipelines can be conveniently produced with large quantity.

Description

The plastic piping seal connector

The utility model relates to a kind of line seal link, relates in particular to a kind of seal connector of plastic piping.

Because three type polypropylene (PP-R) the polyolefin pipe pipes of etc.ing are except that with the thermofussion welding connection, the connection of living of the available pipe fitting that has internal and external threads is so that pipeline maintenance and dismounting; And pipe fittings such as three type polypropylene not only can be used for water supply pipeline but also can be used for carrying hot water below 95 ℃, so obtain extensive use as the indoor heating pipeline, but because mechanical strengths such as three type polypropylene own are relatively poor, and hardness is lower, so directly making internal and external screw thread with three type polypropylene etc. connects, its screw strength is not good enough, and resiliently deformable is big.Being extensive use of at present both at home and abroad is pipe fitting threaded connectors such as three type polypropylene, all uses screw thread embedding (edge) part behind the copper electrochromism (nickel), and embedding (edge) is made into the link that is threaded connection in pipe fittings such as three type polypropylene.Be that this is because distortion, asphyxia by external pressure on the chest and abdomen gap can be squeezed with fiber crops or raw meal belt more firmly in the copper surface with its sealing of realization in fiber crops and lead oil or the polytetrafluoroethylraw raw material band embedding thread pitch during thread seal.But copper screw thread embedding (edge) part processing technology complexity is single piece production, and will electroplate, and it is than great, so cost is higher.

The purpose of this utility model provides the seal connector of a kind of good seal performance, plastic piping that cost is low.

The purpose of this utility model is achieved in that it comprises the joint that has internal thread, has externally threaded joint, and it is characterized in that having the joint of internal thread and having has the O RunddichtringO between the externally threaded joint.

The quantity of above-mentioned O RunddichtringO can be two;

The above-mentioned joint that has internal thread is by pipe joint and have the internal thread inserts and forms, have externally threaded joint by pipe joint with have the outside thread inserts and form, the internal and external screw thread inserts is embedded in respectively on two pipe joints;

Its cross-sectional profile of projection of inlaying part of above-mentioned internal and external screw thread inserts is circle or polygonal, and its recessed portion promptly colludes groove, and its cross-section area also should be polygonal or circle mutually, and perhaps the both is a polygonal;

The cross section of the boss of inlaying the part outer end of above-mentioned internal and external screw thread inserts is the even number polygonal.

Above-mentioned outside thread inserts is embedded in the outside of a joint, and the internal thread inserts is embedded in the inside of nut, and other has a joint to match with the joint of inlaying the outside thread inserts and nut.

Pipeline connecting parts can be lead directly to, the link of threeway, four-way, elbow or tapered pipeline.

The utility model compared with prior art has following advantage:

1. by there being the O RunddichtringO can guarantee that sealing is tight between the joint of plastic piping seal connector and the joint, can not leak.

2. owing to adopt engineering plastics with, outside thread inserts, manufacture as the nylon glass fiber material, its mechanical strength is similar with general copper material, and hardness is higher, and weight only is the sixth of copper, expense only be its 1/5th, so cost is low.

3. do not manufacture and need electroplate,,, produce in enormous quantities very convenient so copper spare needs electrochromism coating because copper influential to three type polypropylene material intensity.

4. structure of the present utility model can be used for the pipeline of various materials.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is the structural representation of first kind of embodiment of the present utility model

Fig. 2 is the structural representation of second kind of embodiment of the present utility model

Fig. 3 is the structural representation of the third embodiment of the present utility model

Fig. 4 is the structural representation of the 4th kind of embodiment of the present utility model

Fig. 1 has provided the structure of first kind of seal connector, and having the joint of internal thread and having has O RunddichtringO 2 or O RunddichtringO 4 between the externally threaded joint.

Fig. 2 has provided the structure of second kind of seal connector, 1 pipe joint, the 2nd, and O RunddichtringO, the 3rd, internal thread inserts, the 4th, O RunddichtringO, the 5th, outside thread inserts, the 6th, pipe joint, the 7th is inlayed projection, the 8th, inlays the groove that colludes of part.Internal and external screw thread inserts the 3, the 5th is produced with the mold injects forming method with engineering plastics such as nylon glass fiber material, and then

inserts

3 and 5 is placed respectively in three type polypropylene, the polyolefin pipe joint 1 and 6 with injecting method, the part of inlaying of internal and external

screw thread inserts

3,5 has projection 7 and colludes groove 8, projection 7 its cross-sectional profile of inlaying part of internal and external

screw thread inserts

3,5 are circle or polygonal, and its recessed portion promptly colludes groove 8, its cross-section area also should be polygonal or circle mutually, and perhaps the both is a polygonal.Internal and external

screw thread inserts

3,5 can not produce radially or axial motion with respect to joint 1,6 respectively like this, in order to guarantee sealing, has increased O RunddichtringO 2 and 4 between joint 1 and 6.There is an O RunddichtringO to get final product generally speaking, can adopts two seal rings when high temperature, high pressure.For good seal, on the internal and external screw thread inserts, be provided with O RunddichtringO groove 9,10.That the utility model can also be made into is straight-through, threeway, four-way or elbow and reducing are two logical, the link of threeway, four-way and elbow.

Fig. 3 has provided the structure of the third seal connector, and internal and external

screw thread inserts

3,5 respectively has a

hexagonal boss

11,12, and instrument easy to use comes fit sealing spare, and all the other are with second kind of structure.

Fig. 4 has provided the structure of the 4th kind of seal connector, and outside thread inserts 5 is embedded in the outside of joint 6, and threaded insert 3 is embedded in the inside of nut 13, and other has a joint 14 to match with joint 6 and nut 13.

Claims

1. plastic piping seal connector, it comprises the joint that has internal thread, has externally threaded joint, it is characterized in that described have the joint of internal thread and have an O RunddichtringO (2 or 4) is arranged between the externally threaded joint.

2. a kind of plastic piping seal connector as claimed in claim 1, it is characterized in that described have the joint of internal thread and have O RunddichtringO (2,4) is arranged between the externally threaded joint.

3. a kind of plastic piping seal connector as claimed in claim 1 or 2, it is characterized in that the described joint that has an internal thread is by pipe joint (1) with have internal thread inserts (3) and form, have externally threaded joint by pipe joint (6) with have outside thread inserts (5) and form, interior line inserts (3) is embedded on the pipe joint (1), and outside thread inserts (5) is embedded on the pipe joint (6).

4. a kind of plastic piping seal connector as claimed in claim 3, it is characterized in that described internal and external screw thread inserts (3,5) the part of inlaying has projection (7) and colludes groove (8), its cross-sectional profile of projection (7) is circle or polygonal, and its cross-section area that colludes groove (8) also should be polygonal or circle mutually, and perhaps the both is a polygonal.

5. a kind of plastic piping seal connector as claimed in claim 3 is characterized in that the part outer end of inlaying of described internal and external screw thread inserts (3,5) has boss (11,12) respectively, and the cross section of boss (11,12) is the even number polygonal.

6. a kind of plastic piping seal connector as claimed in claim 3 is characterized in that described internal thread inserts (3) or outside thread inserts (5) have seal groove (9) or (10).

7. a kind of plastic piping seal connector as claimed in claim 1 or 2 is characterized in that describedly having externally threaded joint by pipe joint (6) with have outside thread inserts (5) and form; Outside thread inserts (5) is embedded in the outside of pipe joint (6), and internal thread inserts (3) is embedded in the inside of nut (13), and other has a joint (14) to match with pipe joint (6) and nut (13).

8. a kind of plastic piping seal connector as claimed in claim 1 or 2, it is characterized in that it be lead directly to, the seal connector of threeway, four-way or elbow.

9. a kind of plastic piping seal connector as claimed in claim 1 or 2 is characterized in that it is that reducing is straight-through, the seal connector of threeway, four-way, elbow.