CN2341003Y

CN2341003Y - Mechanical structure for locking pipe joint

Info

Publication number: CN2341003Y
Application number: CN 98225279
Authority: CN
Inventors: 金永俭; 胡希伦; 刘湘林; 金建国; 陈朝荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-10-07
Filing date: 1998-10-07
Publication date: 1999-09-29
Anticipated expiration: 2008-10-07

Abstract

The utility model relates to a mechanical structure for locking pipe joints, comprising a pipe joint body, a sealing body, a locking and propelling ring and a screw cup. Because an O-shaped sealing ring is changed into the sealing body and a fixed ring and a propelling ring are combined into a whole in the utility model, the sealing property of the connection of joints is improved and elements are reduced. The utility model has the advantages of easy operation and easy installation.

Description

Pipe joint locking mechanical structure

The utility model relates to a kind of improvement structure of pipe joint.

Along with progress of science and technology, be extensive use of plastic water supply pipe at present and replaced zinc-plated water supply steel tube, but no matter which kind of supply pipe all will use pipe joint whenever and wherever possible, and, not only use pipe joint during professional workforce's pipe laying, and the common people also can use pipe joint in daily life at home, therefore, and to the requirement of pipe joint, the one, series reaches easy to use; The one, low price.And be connected the pipe joint of plastic pipe at present, generally include members such as pipe joint body, O type ring, pushing ring, retaining ring and nut cap, wherein, the structural type of pipe joint body has straight pipe type, threeway, CONCENTRIC REDUCER, T type CONCENTRIC REDUCER or 90 degree, one eighth bend etc. multiple, has following shortcoming in the use:

1. because pipe joint body and other member are separated from each other independence, and operation is many when not only implementing, and has increased cost, and easily cause the part loss.

2. construction and installation bother, and must be carried out according to the order of sequence by five steps: a. puts nut cap, pushing ring, O type ring in regular turn from pipe one end earlier, pipe is placed in the pipe joint body again; B. smear soap solution in this pipe periphery and give lubriciously, make to be beneficial to pushing ring to push O type ring in the pipe joint body as far as possible; C. use Chain wrench that nut cap is locked as far as possible, the driving fit of use closely, reliably lock pushing ring and O type ring connects, with anti-leak; D, the nut cap that must use Chain wrench to have locked unclamps and withdraws from, again at the retaining ring of packing in abutting connection with this pushing ring position, in case pipe end gets loose; E. last, must use Chain wrench that nut cap is locked again, and must be locked to and be exposed to outside screw thread and be less than two teeth, till determining absolute locking.

As above-mentioned, it serves to show that there is the complicated procedures in the construction and installation in existing pipe joint structure, time-consuming, effort influences works progress, and efficient is low, the construction cost height.

The purpose of this utility model provides a kind of pipe joint locking mechanical structure, and the member of pipe joint is reduced, and is easy to implement, and is easy to install, and locking is reliable, and good leak tightness is not leaked.

The utility model is to realize like this, it comprises that the body end has the pipe joint body of outer pitch thread, the seal with the port driving fit of this pipe joint body, the locking pushing ring of fastening sealing body, and the nut cap that fits the connection of this locking pushing ring and this pipe joint body, the outer pitch thread of pitch thread and this pipe joint body was screwed in this nut was stamped; The ring body of this locking pushing ring has vertical crack, is characterized in: the inner tubal wall of this pipe joint body dwindles as two-part from port its internal diameter of two fixed positions inwardly and forms the rim of a bowl inclined plane part and backstop convex shoulder siphonata; The sealing body is that an outer circumferential face is meshed with the rim of a bowl inclined plane part of the end inwall of this pipe joint body and inwall is the elastomer of tubular shape, and its rim of a bowl top end is a planar rings; The outer circumferential face of this locking pushing ring is successively ring part, convex shoulder and the tapered portion that connects, and the footpath is slightly less than the port internal diameter of this pipe joint body outside this ring part, and the rim of a bowl top end of its port toroidal surface and sealing body is contact mutually; The footpath is slightly larger than the port internal diameter of this pipe joint body and forms the blocked part outside this convex shoulder; And the inner tubal wall face is provided with the oblique burr of some circles and be the dentation shape of setting one's teeth on edge, and become to fit connection with externally connected pipe; In the in addition end of this nut cap without leave port increase inwardly and form the taper inner tube surface that is meshed with the tapered portion of this locking pushing ring, this taper inner tube surface with should in pitch thread adjoiner formation internal shoulder.

Further, in the utility model, the outer circumferential face of this nut cap longitudinally is provided with some ribs.

From above-mentioned, the utlity model has following progressive effect:

Easy for installation, the layman also can carry out attaching very easily, and pipe joint is connected with the driving fit of external tube ten minutes, sealed reliable, in the utility model, original O type seal ring is changed into seal, the inner tubal wall of its outer circumferential face and pipe joint body is meshed with the inclined-plane, the tight compacted the rim of a bowl top end pushing tow driving fit of closing and being locked pushing ring of backstop convex shoulder institute of its biend receiver pipe connection main body inner wall respectively connects, and its inwall is supported by week outside the external tube to squeeze, this externally connected pipe is again by the inwall backstop convex shoulder institute backstop of pipe joint body, sealing body itself is again an elastomer, therefore, pipe joint body and externally connected pipe reach very good driving fit and are connected with seal; In fact this locking pushing ring possesses the pushing ring in the prior art and the function of retaining ring, be integrated in the utility model, and the one, make convenient for productionly, provide cost savings, another is to make easy for installationly, can not cause the installation quality accident owing to direction is mistaken.

Accompanying drawing of the present utility model is simply described as follows:

Fig. 1 is a half section schematic representation of the present utility model.

Fig. 2 is the half section schematic representation of locking pushing ring of the present utility model.

Fig. 3 is the half section schematic representation of seal of the present utility model.

Below we provide better embodiment of the utility model according to Fig. 1～Fig. 3, and, further provide ins and outs of the present utility model by to this embodiment's description.

See also Fig. 1, Fig. 2, Fig. 3, as shown in the figure, the pipe joint of the utility model system is used to connecting tube and is communicated with driving fit between the pipeline, it comprises pipe joint body 4, driving fit body 3, locking pushing ring 2 and nut cap 1, this pipe joint body 4 can be with the footpath, threeway, CONCENTRIC REDUCER, T type CONCENTRIC REDUCER or 90 degree, the pipe joint body of structural types such as one eighth bend, but pitch thread 41 outside establish the body end, inner tubal wall is then from port two fixed positions inwardly, its internal diameter dwindles as two-part, and formation the rim of a bowl inclined plane part 42 and backstop convex shoulder siphonata 43, in the present embodiment, the material that constitutes pipe joint body 4 is a high density polyethylene (HDPE).

The outer circumferential face of sealing body 3 is the rim of a bowl slope surface that is meshed with end inwall the rim of a bowl inclined plane part 42 of this pipe joint body 4, inwall then is a tubular type, and match with the external diameter of external pipe 5, the rim of a bowl top end 34 of sealing body 3 is a planar rings, in the present embodiment, it is to be made by rubber material.The periphery of this locking pushing ring 2 is the ring part 21 that connects successively, convex shoulder 22 and tapered portion 23, and on ring body, open a vertical crack 24, the external diameter of this ring part 21 is slightly less than the port internal diameter of this pipe joint body 4, the rim of a bowl top end 34 of its port toroidal surface and above-mentioned seal 3 is contact mutually, the external diameter of this convex shoulder 22 is slightly larger than the port internal diameter of this pipe joint body 4 and forms the blocked part, and being provided with the oblique burr 25 of some circles and its, its content wall is the dentation shape of setting one's teeth on edge, can not slide so that can form sealed connection with the outer circumferential face of external pipe 5 during integral installation because of the external force effect, in the present embodiment, use high density polyethylene (HDPE) to make.

It has the interior pitch thread 12 that matches with the outer pitch thread 41 of this adapter body 4 this nut cap 1, whole tapered shape, the end that its bore is big is established interior pitch thread 12, and in the little end of bore without leave port increase inwardly and form the taper inner tube surface 10 that is meshed with the tapered portion 23 of above-mentioned locking pushing ring 2, this taper inner tube surface 10 with should in the adjoiner formation internal shoulder 11 of pitch thread 12, its push-tight should be locked the convex shoulder 22 that advances collar extension, thereby the ring part 21 that makes this locking pushing ring 2 holds out against the rim of a bowl top end 34 of sealing body 3, in the present embodiment also outside nut cap 1 side face establish some ribs 13, with the endurance strength that improves structure be convenient to the application of force.

Claims

1, a kind of pipe joint locking mechanical structure, comprise that the body end has the pipe joint body of outer pitch thread (41) (4), the seal (3) with the port driving fit of this pipe joint body (4), the locking pushing ring (2) of fastening sealing body (3), and the nut cap (1) that fits the connection of this locking pushing ring (2) and this pipe joint body (4), this nut cap (1) has interior pitch thread (12) and the outer pitch thread (41) of this pipe joint body (4) to be screwed; The ring body of this locking pushing ring (2) has vertical crack (24), it is characterized in that:

A. the inner tubal wall of this pipe joint body (4) dwindles as two-part from port its internal diameter of two fixed positions inwardly and forms the rim of a bowl inclined plane part (42) and backstop convex shoulder siphonata (43);

B. sealing body (3) is that an outer circumferential face is meshed with the rim of a bowl inclined plane part (42) of the end inwall of this pipe joint body (4) and inwall is the elastomer of tubular shape, and its rim of a bowl top end (34) is a planar rings;

C. the periphery of this locking pushing ring (2) is ring part (21), convex shoulder (22) and the tapered portion (23) that connects successively, the footpath is slightly less than the port internal diameter of this pipe joint body (4) outside this ring part (21), and the rim of a bowl top end (30) of its port toroidal surface and sealing body (3) is contact mutually; The footpath is slightly larger than the port internal diameter of this pipe joint body (4) and forms the blocked part outside this convex shoulder (22); And the inner tubal wall face is provided with the oblique burr of some circles (25), and it is the dentation shape of setting one's teeth on edge, and becomes to fit connection with externally connected pipe (5);

D. in the in addition end of this nut cap (1) without leave port increase inwardly and form the taper inner tube surface (10) that is meshed with the tapered portion (23) of this locking pushing ring (2), this taper inner tube surface (10) with should in pitch thread (12) adjoiner formation internal shoulder (11).

2, pipe joint locking mechanical structure according to claim 1 is characterized in that the outer circumferential face of this nut cap (1) longitudinally is provided with some ribs (13).