CN204267960U

CN204267960U - A kind of direct insertion fast-assembling joint for plastic tube

Info

Publication number: CN204267960U
Application number: CN201420670719.1U
Authority: CN
Inventors: 孔凡荣; 李志明
Original assignee: GUIZHOU QIANNAN TECHNOLOGY PLASTIC INDUSTRY Co Ltd
Current assignee: GUIZHOU QIANNAN TECHNOLOGY PLASTIC INDUSTRY Co Ltd
Priority date: 2014-11-11
Filing date: 2014-11-11
Publication date: 2015-04-15
Anticipated expiration: 2024-11-11

Abstract

The utility model discloses a kind of direct insertion fast-assembling joint for plastic tube, belong to plumbing pipe interconnection technique field, comprise end cap and body, described end cap is connected with body port activity, seal ring A, pipe box and bullet pad is provided with from inside to outside successively between step in end cap and body, in described end cap, step is also provided with seal ring B, for being threaded between end cap with body.The technical program is threaded with body by end cap, makes the fit up gap between pipe and pipe fitting very little, good stability during installation, not easily rocks wearing and tearing or gets loose; And this joint is quick in installation process, time saving and energy saving, be convenient to self-maintain and replacing in family's using process; By arranging double-layer seal rings, sealing effect is stablized, sealing is more reliable, is applicable to the larger pipeline of internal pressure and connects.

Description

A kind of direct insertion fast-assembling joint for plastic tube

Technical field

The utility model belongs to plumbing pipe interconnection technique field, relates to the Placement of a kind of plastic pipe and plastic pipe, especially relates to a kind of direct insertion fast-assembling joint for plastic tube.

Background technique

At present, the pipe fitting kind in domestic hot-water heating market is varied, and the Placement of pipe and pipe fitting is also varied, and generally more common is direct insertion, namely be pipe is directly inserted in plastics or metal pipe element, then carry out fastening and sealing by inner or external structure; When pipeline needs maintenance or changes, then need pipe to disassemble from pipe fitting, to overhaul or more to renew pipe.But the direct insertion connection of pipeline of the prior art exists some problems, be that the sealing effect after connecting is not good enough on the one hand, occur the phenomenon of fluid seepage sometimes; Be on the other hand after connecting for various reasons, the factors such as such as place spatial constraints, pipe are excessive, very hard when causing pipe and pipe fitting or joint to be taken apart, assistant tool must be used to assist, even usually dismounted badly, or directly cannot be taken apart, cut-out process can only be carried out.

Application number be 200820116654.0 utility model patent disclose a kind of pipe fitting joint, adopt direct insertion connection, by the back-off structure in pipe fitting joint, to realize between pipe fitting joint with pipe quick is connected, and for convenience detach.But this structure exists some defects, be Spielpassung between active ring and pipe on the one hand, also have gap between active ring and retainer, easily relative movement occurs, thus easily cause tube wear and get loose; Be that the inner O of employing RunddichtringO individual layer seals on the other hand, sealing effect is not good enough.

Model utility content

In order to solve the problem, the utility model provides a kind of direct insertion fast-assembling joint for plastic tube, thus reaches and can fast grafting remove with convenient, and reliable sealing prevents the effect of seepage flow.

The utility model is achieved by following technical solution.

A kind of direct insertion fast-assembling joint for plastic tube, comprise end cap and body, described end cap is connected with body port activity, seal ring A, pipe box and bullet pad is provided with from inside to outside successively between step in end cap and body, in described end cap, step is also provided with seal ring B, for being threaded between end cap with body.

Described seal ring A is bowl-type rubber seal; Described seal ring B is rubbery flat gasket circle; Described end cap external cylindrical surface sectional shape is Hexagon or quadrilateral; Described bullet pad adopts stainless steel material to make, and bullet pad inner ring shell fragment tilts to tubular body direction.

The beneficial effects of the utility model are:

The direct insertion fast-assembling joint for plastic tube of one described in the utility model, is threaded connection between end cap and body, makes the fit up gap between pipe and pipe fitting very little, good stability during installation, not easily rocks wearing and tearing or gets loose; And this joint is quick in installation process, time saving and energy saving, be convenient to self-maintain and replacing in family's using process, only need simple tool to assist, without the need to professional and technical personnel and special device; By establishing seal ring between step end face in pipe end face and body, realize first layer sealing; Sealed by bowl-type rubber seal, sealing effect is stablized, particularly when sealing load is large, seal ring inner ring more will fit tightly with pipe under fluid pressure effect, sealing effect is strengthened thereupon, it is more reliable that two-layer sealing configuration makes pipe and pipe fitting joint seal, and is applicable to the larger pipeline of internal pressure and connects.

Accompanying drawing explanation

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

Fig. 2 is assembly structure schematic diagram of the present utility model;

Fig. 3 is the shape assumption diagram of the utility model when being used in valve;

Fig. 4 is the end-face structure schematic diagram of Fig. 3.

In figure: 1-end cap, 2-bullet pad, 3-pipe box, 4-seal ring A, 5-body, 6-seal ring B, 7-pipe.

Embodiment

The technical solution of the utility model is further described below in conjunction with accompanying drawing, but described in claimed scope is not limited to.

As shown in Figure 1 and Figure 2, the direct insertion fast-assembling joint for plastic tube of one described in the utility model, comprise end cap 1 and body 5, described end cap 1 is connected with body 5 port activity, seal ring A4, pipe box 3 and bullet pad 2 is provided with from inside to outside successively between step in end cap 1 and body 5, in described end cap 1, step is also provided with seal ring B6, described seal ring A4 is bowl-type rubber seal; Described seal ring B6 is rubbery flat gasket circle; For being threaded between end cap 1 with body 5.

Described end cap 1 external cylindrical surface sectional shape is Hexagon or quadrilateral or spline teeth, so that dismounting; Described bullet pad 2 adopts stainless steel material to make, and bullet pad 2 inner ring shell fragment tilts to body 5 internal direction.

During Product Assembly, first seal ring B6 is installed on the stage casing step end face in body 5, then be arranged on uncovered for seal ring A4 outwardly on port first order step, then install pipe box 3, seal ring A4 pushes down by pipe box 3, prevent it from moving axially, install bullet pad 2 in pipe box 3 outer end, the shell fragment of bullet pad 2 inner ring all tilts to body 5 internal direction, is finally connected fastening by end cap 1 with body 5 port, realize bullet pad 2 axially locating, complete pipe fitting assembling.When pipe 7 is installed, directly by pipe 7 one end from end cap 1 center hole inserting pipe elements, until pipe 7 end face is close to seal ring B6 end face, now, the seal ring B6 in pipe 7 end face and body 5 between step end face forms first and seals; Meanwhile, seal ring A4 struts by pipe 7, and outer wall and seal ring A4 fit, and forms second sealing; And the shell fragment of bullet pad 2 inner ring is also pushed open by pipe 7, shell fragment, by unidirectional for pipe 7 clamping, reaches the effect of retaining, and pipe 7 is not easily got loose; During dismounting pipe 7, only end cap 1 need be backed out, taken out from body 5 by pipe 7, now bullet pad 2, pipe box 3 and seal ring A4 can be enclosed within pipe 7 outer wall and together be taken out, and seal ring A4, pipe box 3 and bullet pad 2 are taken off successively.

As shown in Figure 3, Figure 4, the utility model structure can be used in the products such as pipeline valve.

Claims

1. a direct insertion fast-assembling joint for plastic tube, comprise end cap (1) and body (5), described end cap (1) is connected with body (5) port activity, seal ring A (4), pipe box (3) and bullet pad (2) is provided with from inside to outside successively between step in end cap (1) and body (5), it is characterized in that, described end cap (1) interior step is also provided with seal ring B (6), for being threaded between end cap (1) with body (5).

2. the direct insertion fast-assembling joint for plastic tube of one according to claim 1, is characterized in that: described seal ring A (4) is bowl-type rubber seal.

3. the direct insertion fast-assembling joint for plastic tube of one according to claim 1, is characterized in that: described seal ring B (6) is rubbery flat gasket circle.

4. the direct insertion fast-assembling joint for plastic tube of one according to claim 1, is characterized in that: described end cap (1) external cylindrical surface sectional shape is Hexagon or quadrilateral.

5. the direct insertion fast-assembling joint for plastic tube of one according to claim 1, is characterized in that: described bullet pad (2) adopts stainless steel material to make, and bullet pad (2) inner ring shell fragment tilts to body (5) internal direction.