CN100436921C

CN100436921C - Calipers type pipe joint

Info

Publication number: CN100436921C
Application number: CNB2007100681794A
Authority: CN
Inventors: 何星灯; 何星祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-23
Filing date: 2007-04-23
Publication date: 2008-11-26
Anticipated expiration: 2027-04-23
Also published as: CN101038058A

Abstract

The present invention discloses a press-fitting pipe joint which includes a pipe body, a sealing ring and a steel sleeve. The two ends of the outer surface of the pipe body connection part are distributed with sawtooth, and the rear outer surface of the pipe body connection part is disposed with a clamping protruding ring which is matched with the inner diameter of the steel sleeve, the surface of the pipe body is opened with an annular groove for mounting the sealing ring and an annular groove for press-fitting connection. The pipe joint is characterized in that it has a position shield ring which is a circular ring with an inner diameter larger than the outer diameter of the rear pipe of the pipe connection part and smaller than the inner diameter of the steel sleeve. The circular ring is disposed with several openings, the end edge of the steel sleeve is inward unciform and opened with several gaps, the hook hand on the end edge of the steel sleeve is matched with the several arc shape openings. The present invention has the following effect: saving labour in mounting, more firmly in fixing, low cost and convenient in machining.

Description

A kind of calipers type pipe joint

Technical field

The present invention relates to a kind of pipe joint, relate in particular to a kind of calipers type pipe joint.

Background technique

The steel bushing of general calipers type pipe joint and body connection part generally all do not have crooked to the inside, but straight being connected on the body, fixation is played with an injection molding gum cover in the outside, such fixed effect is not obvious and be easy to cause steel bushing to come off when pipe fitting is installed, common fixedly gum cover adopts annular plastics circle simple in structure to make, though simple in structurely be easy to cause gum cover to be connected with steel bushing that shaped design does not match and fixed effect is not good; Outer surface of pipe fittings has many close-connected sawtooth in addition, and the pipe joint of this structure is processed complex, cost height not only, and inconvenience during mounting pipe; Moreover the pipe joint that presses for sealed card, generally also need offer many grooves at outer surface of pipe fittings, to lay seal ring, improved processed complex degree and cost again.

Summary of the invention

The present invention overcomes above-mentioned deficiency, purpose is to provide a kind of calipers type pipe joint, the calipers type pipe joint of this structure is by being provided with a circular positioning retainer ring, the circular-arc opening that forms by the hollow out positioning retainer ring mates with the hook palmistry on the end limit of steel bushing, thereby the hook hand on the end limit of steel bushing can pass circular-arc opening, with chucking raised ring chucking, positioning retainer ring can make steel bushing end dilatating and deformable within the specific limits, be convenient to the easier outer rim that enters the chucking projection of steel bushing, form drive fit, steel bushing and pipe fitting body are easy for installation, seal more reliable, and positioning retainer ring can also prevent that steel bushing from keeping lock state along the peripheral direction rotation, can prevent that its external force by anything unexpected from causing rotates in a circumferential direction, and installs more laborsaving, fixing more firm, solved the deficiencies in the prior art part.

The present invention achieves the above object by the following technical programs: a kind of calipers type pipe joint, comprise the pipe fitting body, seal ring, steel bushing, outer surface two ends, pipe fitting body attachment portion are distributed with sawtooth, on the outer surface of rear end, pipe fitting body attachment portion, be provided with the chucking raised ring, described chucking raised ring and steel bushing internal diameter coupling, the pipe fitting body surface has the annular groove of laying seal ring and presses the annular groove that is connected usefulness with card, be characterized in also including a location back-up ring, described positioning retainer ring is an annulus, the internal diameter of annulus is greater than the external diameter of rear end, pipe fitting body attachment portion pipe fitting, internal diameter less than steel bushing, on described annulus, be provided with several circular-arc openings, the end limit of described steel bushing is hook-shaped and have several breach in being, and the hook hand on the end limit of steel bushing mates with several circular-arc openings.

As preferably, described several circular-arc openings are four, and several breach on the end limit of the steel bushing that matches and hook hand also are four.

As preferably, the seal groove of laying seal ring on the outer surface of pipe fitting body attachment portion is one.

As preferably, between the sawtooth on the outer surface of pipe fitting body attachment portion equidistant interval is arranged.

As preferably, the cross section of laying the annular groove of seal ring is a rectangle.

As preferably, described positioning retainer ring is the plastics positioning retainer ring.

Beneficial effect of the present invention:

1) the present invention is by being provided with a location plastics back-up ring, can prevent that steel bushing from keeping lock state along the peripheral direction rotation, can prevent that its external force by anything unexpected from causing rotates in a circumferential direction, this positioning retainer ring adopts lightweight, environmentally-friendly plastic to make, this is not to take general simple solid body structure, but take hollow multi-annular labyrinth, can prevent that like this back-up ring that the expansion owing to using process pipe and steel bushing causes from expanding, also can reduce its deformation quantity, in light, also have beautiful outward appearance and make that its product also is difficult for copying.

2) the present invention only is provided with one at the body connection part and lays the annular groove of seal ring and a card and press to be connected and use annular groove, like this can be in the assurance sealing effect consumption of saving seal ring.

3) the present invention at the two ends of body connection part uniform respectively sawtooth, one closely-spaced ring is arranged between sawtooth and sawtooth, the sawtooth total length accounts for the stem total length and makes an appointment with half, such flexuose distributed architecture, easier and more firm in the time of can making tubulature, prevent leakage phenomenon thereby also can in use reduce becoming flexible of tubing to greatest extent.

4) the present invention is provided with the flanged ring of chucking stainless steel sleeve in body connection part the other end, and the manufacturing flange helps with fastening steel bushing when assembling steel bushing and prevents to come off.

5) the present invention is having four breach on the steel bushing with on the protruding connecting end of the chucking limit, when this not only makes external aluminium-plastic composite pipe install, can observe to insert whether by this breach and put in place, install, seal all more reliable, and can also make steel bushing end dilatating and deformable within the specific limits, be convenient to the easier outer rim that enters the chucking projection of steel bushing, form drive fit and be assemblied on the pipe fitting, avoid coming off.

6) the present invention is applied widely, can be used for pipe fittings such as above two logical, the threeway of an any end or an end, elbow, and install more laborsaving, fixing more firm, cost is low, easy to process.

Description of drawings

Fig. 1 is the sectional structure schematic representation that pipe fitting body of the present invention attachment portion, seal ring, steel bushing, positioning retainer ring and aluminium-plastic composite pipe are linked and packed;

Fig. 2 is that pipe fitting body of the present invention connects decomposition sectional structure schematic representation;

Fig. 3 be among Fig. 2 pipe fitting body attachment portion A-A to structural representation;

Fig. 4 be among Fig. 2 steel bushing part B-B to structural representation;

Fig. 5 is positioning retainer ring portion C-C sectional view among Fig. 2.

Embodiment

The present invention is further elaborated by embodiment below in conjunction with accompanying drawing:

Embodiment 1: as shown in the figure, a kind of calipers type pipe joint, by pipe fitting body 1, seal ring 11, steel bushing 2, plastics positioning retainer ring 3 constitutes, pipe fitting body 1 is made for metallic copper, the outer surface two ends distribution sawtooth 6 of pipe fitting body 1 attachment portion, equidistant interval 5 is arranged between sawtooth and the sawtooth, the sawtooth total length accounts for the stem total length and makes an appointment with half, on the outer surface of rear end, pipe fitting body 1 attachment portion, be provided with chucking raised ring 9, described chucking raised ring 9 and steel bushing 2 internal diameters coupling, pipe fitting body 1 surface has an annular groove 8 of laying seal ring 11 and presses the annular groove 7 that is connected usefulness with card, the cross section of annular groove 8 is a rectangle, described positioning retainer ring 3 is an annulus, the internal diameter of annulus less than the internal diameter of steel bushing 2, is provided with 4 circular-arc openings 13 greater than the external diameter of rear end, pipe fitting body 1 attachment portion pipe fitting on described annulus, hook-shaped and symmetrical 4 breach 10, the hook hand on the end limit of

steel bushing

2 and 4 circular-arc opening 13 couplings of having in the end limit of described steel bushing 2 is.

Described plastics positioning retainer ring adopts lightweight, environmentally-friendly plastic to make, this is not to take general simple solid body structure, but take hollow multi-annular labyrinth, can prevent that like this back-up ring that the expansion owing to using process pipe and steel bushing causes from expanding, also can reduce its deformation quantity, in light, also have beautiful outward appearance and make that its product also is difficult for copying.

When aluminium-plastic composite pipe 4 inserts the appearance of pipe fitting body 1 attachment portion and the space between the steel bushing 2, and by this breach 10 observe its inserted put in place after, be the tight steel bushings of available special tool pincers pincers, the rib of projection is out of shape on the aluminium-plastic composite pipe 4 that is fixed under it steel bushing 2 on the jaw corresponding position, driving it simultaneously is out of shape together, aluminium-plastic composite pipe 4 crushed elements snap in card and press in the annular groove 7 that connects usefulness, thereby form a fastening integral body, to locate plastics back-up ring 3 after steel bushing 2 installs and be contained in its outside, Stationary Steel Bushing 2 increases sealing effect simultaneously.

Given example can not be interpreted as limiting the scope of the invention, thereby the nonessential improvement done according to above-mentioned actual content and design philosophy of professional and technical personnel and adjust and also belong to protection scope of the present invention.

Claims

1, a kind of calipers type pipe joint, comprise pipe fitting body (1), seal ring (11), steel bushing (2), the outer surface two ends of pipe fitting body (1) attachment portion are distributed with sawtooth (6), on the outer surface of pipe fitting body (1) rear end, attachment portion, be provided with chucking raised ring (9), described chucking raised ring (9) and steel bushing (2) internal diameter coupling, pipe fitting body (1) surface has the annular groove (8) of laying seal ring (11) and presses the annular groove (7) that is connected usefulness with card, it is characterized in that also including a location back-up ring (3), described positioning retainer ring (3) is an annulus, be hollow multi-annular structure, the internal diameter of annulus is greater than the external diameter of pipe fitting body (1) rear end, attachment portion pipe fitting, internal diameter less than steel bushing (2), on described annulus, be provided with several circular-arc openings (13), the end limit of described steel bushing (2) is hook-shaped and have several breach (10) in being, and the hook hand on the end limit of steel bushing (2) mates with several circular-arc openings (13).

2, calipers type pipe joint according to claim 1 is characterized in that described several circular-arc openings (13) are four, and several breach (10) and the hook hand on the end limit of the steel bushing that matches (2) also are four.

3, calipers type pipe joint according to claim 2, the seal groove (8) that it is characterized in that laying on the outer surface of pipe fitting body (1) attachment portion seal ring (11) is one.

4, calipers type pipe joint according to claim 3 is characterized in that between the sawtooth (6) on the outer surface of pipe fitting body (1) attachment portion equidistant interval (5) being arranged.

5, according to claim 1 or 2 or 3 or 4 described calipers type pipe joints, the cross section that it is characterized in that laying the annular groove (8) of seal ring (11) is a rectangle.

6,, it is characterized in that described positioning retainer ring (3) is a plastics positioning retainer ring (3) according to claim 1 or 2 or 3 or 4 described calipers type pipe joints.

7, calipers type pipe joint according to claim 5 is characterized in that described positioning retainer ring (3) is a plastics positioning retainer ring (3).