CN102758984A

CN102758984A - Rapid insertion and pulling pipe joint

Info

Publication number: CN102758984A
Application number: CN2011101026791A
Authority: CN
Inventors: 乔坤; 黎新
Original assignee: HUBEI OUBO AUTO PARTS CO Ltd
Current assignee: HUBEI OUBO AUTO PARTS CO Ltd
Priority date: 2011-04-25
Filing date: 2011-04-25
Publication date: 2012-10-31

Abstract

The invention provides a rapid insertion and pulling pipe joint which structurally comprises a pipe joint body. Four step holes are sequentially arranged in the pipe joint body from small to big; a bush, a V-shaped sealing ring and a supporting ring are respectively arranged; the bush is fixed through welding; the upper end face of the supporting ring is abutted against the lower end face of the V-shaped sealing ring; a fixed ring is arranged under the supporting ring; two O-shaped sealing rings with different sizes are respectively arranged inside and outside the fixing ring; a clamp ring is arranged under the fixing ring; a hold-down ring is arranged under the clamp ring; and a plastic tube is inserted into a joint body and is clamped under the elasticity of the clamp ring. Compared with the prior art, the rapid insertion and pulling of the joint and a pipeline (and a body with a similar structure) in an automobile pipeline system can be realized; and the rapid insertion and pulling pipe joint has the characteristics of reasonable design, simple structure, good sealing performance, high pressure resistance, firmness for connection, shock resistance, safety, reliability and the like and can be used in different environments and under different working conditions.

Description

The fast insert-pull pipe joint

Technical field

The present invention relates to a kind of pipe joint that is used to connect plastic tube; Comprise fast insert-pull pipe joint in many industries such as lathe, engineering machinery, boats and ships, mould manufacturing, household electrical appliances, medical apparatus, precision type instrument, Aero-Space; A kind of fast insert-pull pipe joint that is applied to the automobile pipe-line system especially is provided, and working medium relates to gas and liquid.

Background technique

The numerous areas of pipe connection system in industry born important effect, automobile pipeline requisite system in the vehicle especially particularly, and it has occupied crucial status in chassis braking system and steering system; Wherein the good of pipe joint is the important indicator of the whole vehicle safety of influence, and what generally adopt in the present commercial car system at home all is regular screw threads jointing type pipe joint, promptly is commonly called as " three-piece "; It is made up of joint body, gland nut, lining and fixed cover, when assembling, need lining, fixed cover and plastic tube be pre-assembled the gland nut of packing into then; Gland nut is connected with joint body, this pipe seal only depends on the rigidity conical surface seal between fixed cover and the joint body again, through use after a while; Screw thread can become flexible; And then cause poorly sealed and leak gas, so need frequent fastening gland nut, simultaneously; This technology assembling is complicated, and receives the low labor intensity of assembly space restriction efficiency of assembling big.Also there is a kind of quick inserting joint in existing technology; It is made up of fittings body, male connector, snap ring, swivel nut, different in nature seal ring; It is to be parent with the fittings body, and different in nature seal ring is put into fittings body, puts into snap ring then; Screw in fittings body with the swivel nut that has seal ring, insert in the fittings body after male connector is connected nylon tube.This technology only can realize inserting soon but can not realize pulling out soon, and nylon tube is connected very complicated with male connector simultaneously, and sealing is poor.More than two kinds of technology all fundamentally do not solve the sealing problem of pipe joint, and complex structure, efficiency of assembling is low, processing cost is high, vibration resistance, reliability and anti-performance of operating condition are all lower, the user changes relatively difficulty.

Summary of the invention

The object of the present invention is to provide a kind of novel fast insert-pull pipe joint; Utilize air pressure selfsealings principle, adopt V-shaped seal ring and O RunddichtringO double sealing structure, fundamentally solve the deficiency on the existing technology; Thoroughly solve the three leakage problems that existing pipe joint exists (gas leakage, leakage of oil, leak); Increase working pressure of pipeline, change the fit of existing automobile pipeline simultaneously, nylon tube is inserted gently the assembling that can realize nylon tube and joint in the fittings body; Improve the assembling work efficient of automobile pipe-line system, saved human cost.The fast insert-pull process can guarantee the insertion of pipe repeated multiple times or extract.Effectively solve the predicament that the terminal use can't change joint voluntarily; Simultaneously this technical products good airproof performance, withstand voltage height, be connected firmly, safety, antivibration, reliability is high; Different operating modes under the suitable varying environment, and assembling simply do not receive spatial limitation, reduced the car load overall cost.

Technological scheme of the present invention is: a kind of fast insert-pull pipe joint comprises a pipe joint body, a lining, a V-shaped seal ring, a support ring, an outer O RunddichtringO, an interior O RunddichtringO, a retaining ring, a snap ring and a hold-down ring.Four step holes are from small to large arranged in described pipe joint body successively, in the pipe joint body, lining is housed, adopt welding fixing between lining and the fittings body; The V-shaped seal ring of packing into then, the lower end surface that utilizes the upper-end surface of support ring to withstand V-shaped seal ring, outer O RunddichtringO and interior O RunddichtringO are contained in respectively in two step holes of retaining ring; Then retaining ring is packed in the joint body; Snap ring and hold-down ring are assembled together, and wherein the male cone (strobilus masculinus) of snap ring matches with the inner conical surface of hold-down ring, then snap ring are packed in the fittings body with hold-down ring; The hold-down ring top contacts with the step surface of retaining ring, at last joint body and hold-down ring employing is press-fitted encapsulation.During use, plastic tube directly inserted in the fittings body get final product.

Beneficial effect:

Ingenious air pressure selfsealings principle and the product self structure characteristics utilized of the present invention through triple seal, can realize the quick connection and the disconnection of various (the connection plastic tube) pipe joint; Simple in structure, plug is steady, good airproof performance; Efficient is high, is convenient to the dismounting of pipeline.

Description of drawings

Below in conjunction with accompanying drawing and instance the present invention is further specified;

Fig. 1 is a kind of structural front view of fast insert-pull pipe joint;

Fig. 2 is a kind of structural front view of joint body of fast insert-pull pipe joint;

Fig. 3 is a kind of structural front view of retaining ring of fast insert-pull pipe joint;

Fig. 4 is a kind of structural front view of V-shaped seal ring of fast insert-pull pipe joint;

Fig. 5 is a kind of structural front view of hold-down ring of fast insert-pull pipe joint

Fig. 6 is a kind of structural front view of snap ring of fast insert-pull pipe joint;

Fig. 7 is a kind of user mode figure (curved logical) of fast insert-pull pipe joint;

Fig. 8 is a kind of user mode figure (threeway) of fast insert-pull pipe joint.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the present invention is described further, but not as to qualification of the present invention.Provide a most preferred embodiment below:

Shown in accompanying drawing 1, a kind of fast insert-pull pipe joint comprises pipe joint body 1; Four step holes are from small to large arranged in the said pipe joint body 1 successively; Lining 2, V-shaped seal ring 3, support ring 4 are set respectively, and said lining 2 adopts welding fixing with joint body 1, and the lower end surface of V-shaped seal ring 3 is withstood in the upper-end surface of said support ring 4; The below of said support ring 4 is provided with retaining ring 7; O RunddichtringO 6 and outer O RunddichtringO 5 in the inside and outside step hole place of retaining ring 7 is provided with respectively, retaining ring 7 belows are provided with snap ring 9 and hold-down ring 8, and hold-down ring 8 contacts fixing with the interior male cone (strobilus masculinus) of snap ring 9 employings; Between described lining 2, V-shaped seal ring 3 and snap ring 9, the gap that holds nylon tube is arranged.Retaining ring 7 is assemblied in and utilizes hold-down ring 8 fixing in the body; Utilize both conical surfaces to fix between snap ring 9 and the hold-down ring 8; And the conical surface 74 tops contact with snap ring inner conical surface 92 under the retaining ring, adopt between last hold-down ring male cone (strobilus masculinus) 84 and this body cone of pipe joint 12 to be press-fitted encapsulation; Said lining 2 is contained in step 13 places in the fittings body 1; Main plaing a part led and supports, and V-shaped seal ring 3 installs to step 14 places in the joint 1, after gas or liquid get into the V-type groove; Utilize the selfsealings principle under pressure, V-shaped seal ring plays the effect of sealing to the both sides extruding.Support ring 4 installs to step 15 places in the fittings body 1, plays the effect of supporting V-shaped seal ring; Outer O RunddichtringO 5 and interior O RunddichtringO 6 install to the

step hole

71 and 72 places of retaining ring 7 respectively, play secondary seal and dust-tight effect.Snap ring 9 is packed in the hold-down ring 8, then snap ring is packed in the fittings body with hold-down ring, and snap ring is locked plastic tube with hold-down ring.At first plastic tube 10 is inserted in the snap ring 9 in use, the inner conical surface of snap ring 9 will contact with the following conical surface 74 of retaining ring under thrust, and retaining ring 7 will make snap ring 9 opened with certain angle; Plastic tube will be inserted into fittings body interior step 14 places always; Under the pretightening force effect, the tapered tooth of snap ring is automatically with plastic tube locking, when plastic tube 10 outwards moves under external force; Snap ring 9 and the hold-down ring 8 one generation contractile force that works, plastic tube 10 is tightly locked.During plastic tube, forward touch snap ring 9 with extracting tool in dismounting, make the inner conical surface 92 of snap ring withstand the following conical surface 74 of retaining ring, let snap ring 9 opened with certain angle, can extract plastic tube 10 fast out this moment;

This technological scheme good airproof performance, to bear pressure big, is connected firmly, safety, antivibration, reliability is high, and different operating modes under the suitable varying environment, and assembling simply do not receive spatial limitation, and efficiency of assembling is high; The user changes conveniently.

Above-described embodiment, the present invention embodiment a kind of more preferably just, common variation that those skilled in the art carries out in technological scheme scope of the present invention and replacement all should be included in protection scope of the present invention.

Claims

1. a fast insert-pull pipe joint comprises joint body (1), lining (2), V-shaped seal ring (3), support ring (4), outer O type circle (5), interior O type circle (6), retaining ring (7), hold-down ring (8) and snap ring (9) composition; It is characterized in that four center step holes (13), (14), (15), (16) are from small to large arranged in the said joint body successively; Lining (2) is a hollow cylinder; V-shaped seal ring (3) is a ring bodies, is respectively arranged with four conical surfaces (31), (32), (33), (34); Retaining ring (7) is a ring bodies, is provided with three steps (71), (72), (73), and wherein the bottom outside wall of step (73) is the conical surface (74); Hold-down ring (8) is a hollow cylinder, and the cylindrical body top inner surface has a step (81), and the conical surface (82) is arranged at the step bottom, and a ring shaped step (83) is arranged at the cylindrical body bottom, and the cylindrical body outer surface has the conical surface (84); Snap ring (9) is a hollow cylinder; One step (91) is arranged at the cylindrical body top; The step inner side surface is the conical surface (92), and the step lower surface is the conical surface (93), and the cylindrical body outer surface has the conical surface (94); One protruding circular ring (95) is arranged at conical surface bottom, from the top to cylindrical body 2/3 6-10 equally distributed opening slot (96) is arranged; Lining (2) is contained in fittings body (1) step hole (13) and locates; V-shaped seal ring (3) is contained in fittings body (1) step hole (14) and locates; Support ring (4) is contained in fittings body (1) step hole (15) and locates; Outer O type circle (5) is contained in retaining ring (7) step hole (71) and locates, and interior O type circle (6) is contained in retaining ring (7) step hole (72) and locates, and retaining ring (7) is contained in fittings body (1) step hole (16) and locates; Snap ring (9) is assembled together with hold-down ring (8); Wherein the male cone (strobilus masculinus) (95) of snap ring (9) matches with the inner conical surface (82) of hold-down ring (8), then snap ring (9) is packed in the fittings body (1) with hold-down ring (8), and hold-down ring (8) top contacts with the step surface (73) of retaining ring (7); During use, the step hole (14) that plastic tube (10) directly inserts in the fittings body (1) is located.

2. a kind of fast insert-pull pipe joint according to claim 1 is characterized in that, the male cone (strobilus masculinus) angle of said snap ring (9) is 30 °-49 °, and said hold-down ring (8) inner conical surface angle is 30 °-49 °.

3. a kind of fast insert-pull pipe joint according to claim 1 is characterized in that, the front end of said joint body (1) is tapered thread or regular screw threads (11).