CN201028219Y

CN201028219Y - Pipe joint for connecting polythene or polyvinyl chloride pipes

Info

Publication number: CN201028219Y
Application number: CNU2007200101544U
Authority: CN
Inventors: 韩宝元
Original assignee: Fushun Zhengmei Research & Technology Development Co Ltd
Current assignee: Fushun Zhengmei Research & Technology Development Co Ltd
Priority date: 2007-01-13
Filing date: 2007-01-13
Publication date: 2008-02-27
Anticipated expiration: 2017-01-13

Abstract

The utility model belongs to the pipe connecting piece technical field, in particular to a tube union used to connect the pipe fittings made from polythene and polyvinyl chloride. The tube union is suitable for the large transportation project such as pipes for gas drainage and gas supply. The tube union comprises a set of pipe clips provided with a fixed lug hole respectively at the two ends buckled together, the interior side of each pipe clip is provided with a sealing slot and a pipe-end positioning slot. The end of the pipe fitting coordinating with the tube union is provided with a positioning clip head protruding outward, when the positioning clip heads of the two pipe fittings are in butt joint, the tube union is used to arrange the set of the pipe clips into the sealing ring and then buckles the pipe clips onto the positioning clip heads of the pipe fittings in butt joint, so that the positioning clip slot on the pipe end inside the pipe clip properly contains the protruding positioning clip head of the pipe fitting to be connected and then bolts and nuts are used for fixation to accomplish the assembly of the pipeline. Compared with the prior flange connection, the utility model with reasonable design can not only absorb axial force, flexural moment and torsional moment due to outside force acting on the pipes and ensure safety of the pipeline, but also accomplish the economized cost of raw materials by 20 percent and increased construction efficiency by 5-10 percent.

Description

Polyethylene, polychloroethylene pipes connect uses pipe joint

One, technical field

The utility model belongs to the pipe joint technical field, is specifically related to a kind of polyethylene, polychloroethylene pipes and connects and use pipe joint, is applicable in the large-scale transmission engineerings such as the colliery draws out methane, combustion gas conveying and uses.

Two, background technique

The pipeline of existing use polyethylene, polychloroethylene pipes connects the main two kinds of modes that adopt: the instant heating crack connects with flange and is connected.The sweat soldering method can not be used under inflammable and explosive environment.And there is following defective in the flange connecting means: two side flange screws are to the positive justification difficulty when 1, installing; 2, bolt quantity is many, needs radially corresponding bolt fastening synchronously during clamping bolt, inconvenient operation; 3, owing to variation of ambient temperature, pipeline and connecting bolt produce the phenomenon of expanding with heat and contract with cold, and cause bolt looseness, cause the pipeline connection part to leak.

Three, summary of the invention

The purpose of this utility model provides a kind of polyethylene, polychloroethylene pipes connection pipe joint, this pipe joint can overcome sweat soldering and be connected deficiency and the defective that exists with flange, and can on sealability and Safety performance, be guaranteed, and can save raw material, also can improve efficiency of construction simultaneously.

The utility model is the pipe joint that cooperates polyethylene, polyvinyl chloride pipeline to use.This pipe joint by two end bands fixedly one group of pipe clamp of earhole snap together and constitute, its pipe clamp inboard is provided with seal groove and pipe end locating groove.Should there be the location dop of evagination its end of tubing that is used with this pipe joint, when the location card head end of 2 tubing evaginations docks, adopt the utility model pipe joint, one group of pipe clamp packed into be fastened on the dop place, location of butt joint tubing behind the seal ring, make the pipe end locating groove in the pipe clamp of splitting just in time contain the evagination location dop that docks tubing, and then bolt is penetrated the fixedly earhole of the pipe clamp that snaps together, connect with the fastening installation that can finish pipeline of nut.

The utility model is reasonable in design, is connected with present flange and compares, and can not only absorb because of axial force that the external force effect produces pipeline, moment of flexure, moment of torsion etc., has ensured the safety of pipeline, but economical with materials expense 20% also, and improve work efficiency 5-10 doubly.

Four, description of drawings

Fig. 1 is the structural representation of pipe clamp of the present utility model;

Fig. 2 is the plan view of Fig. 1;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is the worm's eye view of Fig. 1;

Enforcement illustration when Fig. 5 is used for piping erection for the utility model;

Fig. 6 (a) is the sealability schematic representation of the utility model installment state;

Fig. 6 (b) is the distortion comparison diagram of the utility model at fastening front and back sealing rings;

Fig. 6 (c) is the pipeline that install to connect with the utility model at the sealing state figure of positive pressure during in inner chamber;

Fig. 6 (d) is the pipeline that install to connect with the utility model at the sealing state figure of suction function during in inner chamber.

Five, embodiment

Fig. 1 to Fig. 4 has provided pipe clamp structure of the present utility model, it is to be snapped together by one group of pipe clamp 1 to constitute that the utility model---polyethylene, polychloroethylene pipes connect with pipe joint, the quantity of pipe clamp 1 should be according to the size decision of pipe diameter, when 300mm is following, can select 2 lobe pipe clamps as pipe diameter, pipe diameter is when 300mm is above, can select 3-6 lobe pipe clamp according to actual needs, promptly the quantity of one group of pipe clamp 1 is the 2-6 lobe, and the fastening back wall is circular.Two ends of pipe clamp 1 are provided with fixedly earhole 2.The inboard of pipe clamp 1 is provided with seal groove 3 and pipe end locating groove 4, and seal groove 3 is positioned on the pipe end locating groove 4, is ladder-like arranged.

As can be seen from Figure 5, when the utility model pipe joint was adopted in the pipeline connection, should there be the location dop 5 of evagination the butt joint end of its tubing.After using the utility model pipe joint to carry out the piping erection connection, can produce gap E between the tubing butt end, the connection part of one group of pipe clamp 1 can be brought into play movable performance flexible, crooked, rotation by this gap; This performance can make the utility model pipe joint that tubing body axial force, moment of flexure, the torque that produces because of external force absorbed, thereby ensures the safety of pipeline.

Fig. 6 (a) is the sealability schematic representation of the utility model installment state; Fig. 6 (b) is the distortion comparison diagram of the utility model at fastening front and back sealing rings; Fig. 6 (c) is the pipeline that install to connect with the utility model at the sealing state figure of positive pressure during in inner chamber; Fig. 6 (d) is the pipeline that install to connect with the utility model at the sealing state figure of suction function during in inner chamber.From each figure of Fig. 6 as can be seen, one group of pipe clamp of the present utility model packed into is fastened on location dop 5 places of the tubing (road) of butt joint behind the seal ring 6, and through after bolt, nut fastening, seal ring 6 produces distortion and presses to pipe end, will play seal action.Therefore the selection of seal ring 6 is very important, and the height of seal ring 6 should be higher than the height of pipe clamp 1 seal groove 3, can produce compressing to pipe clamp when clamping bolt, nut, makes the lip limit of seal ring 6 tightly press to the sealing surface of pipe end.When fluid pressure action during in the inner chamber of fastened seal ring 6, the interior pressure that produces will be dispersed throughout the whole inner face of seal ring 6, the interior pressure that acts on the lip limit can produce bigger pressure to sealing surface, consequently, interior effect of pressing is big more, the performance of sealability is just good more, thereby has prevented the leakage of fluid.When suction function during in seal ring 6 inner chambers, by the sealing surface of the pressure reduction extruded tube end between barometric pressure and the negative pressure, under this state, the effect of negative pressure is big more, and the performance of sealability is just good more, thereby prevents the intrusion of extraneous gas.

Claims

1. a polyethylene, polychloroethylene pipes connect and use pipe joint, it is characterized in that: this pipe joint by two end bands fixedly one group of pipe clamp (1) of earhole (2) snap together formation, its pipe clamp (1) inboard is provided with seal groove (3) and pipe end locating groove (4).

2. polyethylene according to claim 1, polychloroethylene pipes connect uses pipe joint, and it is characterized in that: the quantity of described one group of pipe clamp (1) is the 2-6 lobe, and the fastening back wall is circular.

3. polyethylene according to claim 1 and 2, polychloroethylene pipes connect uses pipe joint, and it is characterized in that: described seal groove (3) is positioned at the inboard of pipe end locating groove (4), is stepped shaft and arranges.