CN201028216Y

CN201028216Y - Metal pipe joint for connecting polythene or polyvinyl chloride pipes

Info

Publication number: CN201028216Y
Application number: CNU2007200120865U
Authority: CN
Inventors: 韩宝元; 孙英华
Original assignee: FUSHUN KOSHUHA FOUNDRY Co Ltd
Current assignee: FUSHUN KOSHUHA FOUNDRY Co Ltd
Priority date: 2007-05-11
Filing date: 2007-05-11
Publication date: 2008-02-27
Anticipated expiration: 2017-05-11

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 made from metal and suitable for the large transportation project such as pipes for gas drainage and gas supply. The tube union is a set of pipe clips provided with a fixed lug hole respectively at the two ends buckled together, and a sealing slot cavity is arranged in the interior side of the pipe clip. The tube union is characterized in that teeth are arranged on the contacting surface of the pipe clip with the connected pipe fittings made from polythenes and polyvinyl chloride. Two lug holes are symmetrically arranged on the two ends of the pipe clip, so that the teeth on the pipe clip can be pressed fixedly into the pipe fittings after the fixation through the bolt so as to accomplish better positioning and sealing effect. Compared with the hot-melt welding and flange connection, the utility model can not only absorb the axial force, flexural moment and torsional moment due to outside force acting on the pipes with ensured sealing effect and ensured safety of the pipes, but also accomplish the economized cost of raw materials by 20 percent and increased construction efficiency by 5-10 percent.

Description

The metallic pipe coupling that connection polyethylene, polychloroethylene pipes are used

One, technical field

The utility model belongs to the pipe joint technical field, is specifically related to a kind of pipe joint that is used to connect polyethylene and polychloroethylene pipes.This pipe joint is a metal material, applicable to coal gas draw out methane, in the large-scale transmission engineering such as fuel gas transportation pipeline.

Two, background technique

In the prior art, three kinds of modes are mainly adopted in the connection of polyethylene, polychloroethylene pipes: sweat soldering, flange connect and application number is that 200720010154.4 disclosed use polyethylene, polychloroethylene pipes connect the connection with pipe joint.The tubing sweat soldering is not only needed to use special device and can not adopt in the occasion that flammable explosive gas is arranged.And the flange connecting means is many owing to bolt quantity when mounted, and the screw of two side flanges is relatively more difficult to positive justification; When clamping bolt, also need radially corresponding bolt fastening synchronously, inconvenient in the operation; Particularly owing to the variation of ambient temperature, pipeline and connecting bolt produce the phenomenon of expanding with heat and contract with cold, and easily cause bolt looseness, cause the leakage of pipeline connection part.Request for utilization number is that the butt end that 200720010154.4 polyethylene, polychloroethylene pipes connect with pipe joint its tubing when connecting polyethylene, polyvinyl chloride pipeline must be welded into the pipe end dop that has flange, therefore to the butt end of the tubing special processing of need also.

Three, summary of the invention

The purpose of this utility model is that developing a kind of is non-sweat soldering, and also non-flange connects, and need not make the pipe joint of any processing with regard to a kind of metal material applicatory to the butt end of polyethylene, polychloroethylene pipes.

The utility model pipe joint is to be the improvement of 200720010154.4 polyethylene, polychloroethylene pipes connection usefulness pipe joint to application number.This pipe joint is the link of metal material, be by two end bands fixedly one group of pipe clamp of earhole snap together and constitute, the pipe clamp inboard is provided with the sealing vallecular cavity.The characteristics of this pipe joint are to be provided with teeth at the surface of contact place of pipe clamp and connected polyethylene, polychloroethylene pipes.When 2 polyethylene, when polychloroethylene pipes connects, adopt the utility model pipe joint, one group of pipe clamp is fastened on the joint of 2 tubing of suit seal ring, then bolt is penetrated the fixedly earhole of the pipe clamp that snaps together, tightening nut can be finished the connection of pipeline.Because the utility model is a metalwork, its pipe clamp has teeth, and the material of polyethylene, polychloroethylene pipes is softer relatively, therefore in the installation that pipeline connects, tightening nut, just more the teeth on its pipe clamp are pressed on the tubing, promptly played positioning action, has sealing effect again, the synergy of seal ring make the pipeline butt end of adopting the utility model to connect can sustain the interior positive and negative pressure of pipeline, and interior pressure is big more in addition, the performance of sealability is just good more, thereby prevents the leakage of pipeline inner fluid.

The utility model is reasonable in design, compares with three kinds of Placements in the background technique, can absorb the axial force that pipeline is produced because of the external force effect, and moment of flexure, moment of torsion etc. are guaranteed on sealability and Safety performance, have ensured the safety of pipeline; Do not need again the connecting end of polyethylene, polychloroethylene pipes is done any processing, install very convenient; And can save cost of raw and processed materials 20%, improve efficiency of construction 5-10%.

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 is the schematic representation of the utility model sealability.

Five, embodiment

Fig. 1-Fig. 4 has provided pipe clamp structure of the present utility model.The utility model pipe joint is to be snapped together by one group of pipe clamp 1 to constitute.The quantity of pipe clamp 1 should can be selected 2 lobe pipe clamps as pipe diameter according to the size decision of pipe diameter when 300mm is following, pipe diameter can be selected 3-6 lobe pipe clamp according to actual needs when 300mm is above, and the fastening back wall is circular.As can be seen from Figure 3, the inboard of pipe clamp 1 is provided with seal groove 3, and the shape of seal groove 3 should be determined according to seal ring 6.Two ends at pipe clamp 1A-A section promptly are provided with teeth 5 with surface of contact 4 places that are connected tubing, fixedly earhole 2 at two side ends of pipe clamp 1 is symmetrically arranged ears holes, can be pressed into tubing firmly with the teeth on the pipe clamp after the bolton 15 like this, make the meeting of location and sealing effect better.

As can be seen from Figure 5, in the piping erection engineering, adopt the utility model pipe joint, do not need any processing (as weldering location dop) is done in the butt end of tubing, convenient, practical especially.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 moment of torsion that produces because of external force absorbed, thereby ensures the safety of pipeline.

Shown in Figure 6 is the utility model pipe joint sealing condition in use.1. the sealability schematic representation of the utility model installment state among Fig. 6; 2. the distortion comparison diagram of the utility model among Fig. 6 at fastening front and back sealing rings; 3. the pipeline that install to connect with the utility model among Fig. 6 at the sealing state figure of positive pressure during in inner chamber; 4. the pipeline that install to connect with the utility model among Fig. 6 at the sealing state figure of suction function during in inner chamber.From each figure of Fig. 6 as can be seen, be fastened on the joint in tubing (road) behind the seal ring 6 of will one group of pipe clamp of the present utility model packing into, through after bolt, nut fastening, seal ring 6 produces to be out of shape 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. one kind connects the metallic pipe coupling that polyethylene, polychloroethylene pipes are used, by two end bands fixedly one group of pipe clamp (1) of earhole (2) snap together formation, pipe clamp (1) inboard is provided with seal groove (3), it is characterized in that locating to be provided with teeth (5) at the pipe clamp (1) and the surface of contact (4) of connected tubing.

2. the metallic pipe coupling that connection polyethylene according to claim 1, polychloroethylene pipes are used is characterized in that described fixedly earhole (2) is that two side ends at pipe clamp (1) are symmetrical arranged the ears hole.