CN2420483Y

CN2420483Y - Clasp type pipe joint

Info

Publication number: CN2420483Y
Application number: CN 00219966
Authority: CN
Inventors: 韩建国
Original assignee: SANLI SPECIAL STEEL PRODUCTS C
Current assignee: SANLI SPECIAL STEEL PRODUCTS C
Priority date: 2000-04-13
Filing date: 2000-04-13
Publication date: 2001-02-21
Anticipated expiration: 2010-04-13

Abstract

The utility model relates to a clamping ring type pipe joint, which is suitable for connecting pipes of water or gas. The utility model comprises a joint body 1 and a nut 4. The utility model is characterized in that a clamping ring 3 and a sealing ring 2 are inserted between the inner wall surfaces of inner holes of the joint body 1 and the nut 4 and the outer wall surfaces of pipes 5 which need to be connected. The back end of an outer wall of the clamping ring 3 is provided with an outer conical surface 3-2; the front end of an inner hole of the sealing ring 2 is provided with an inner conical surface 2-1; the outer conical surface 3-2 at the back end of the clamping ring is connected with the inner conical surface 2-1 at the front end of the sealing ring; the inner wall surface of the clamping ring 3 clasps with the outer wall surface of the pipes 5 which need to be connected. The utility model has the advantages of stable sealing performance, reasonable nut anti-loosing mechanism and convenient disassembly and assembly.

Description

The clasp type pipe joint

The utility model relates to a kind of pipeline connecting parts, specifically a kind of pipe joint.Be applicable to that the water of nominal pressure Pa≤1.6MPa, the pipeline of gas connect.

The key of pipe joint is that sealing is reliable, the join strength height, and anti-loosening property is good, is convenient to mounting or dismounting.A kind of Bite type fittings commonly used at present adopts the cutting ferrule sealing.Its major defect is: the sealability instability, and nut does not have locking characteristic during vibration, the matching requirements height, because of cutting ferrule cutting edge incision pipe produces in the nut screwing clamping process, the incision situation is subjected to the influence of screw-down torque size.

The purpose of this utility model is to provide a kind of sealability stable, has rational nut anti-looseness mechanism, the pipe joint that helps installing and removing.

The purpose of this utility model is achieved in that a kind of clasp type pipe joint, comprise the nut on fittings body and the fittings body, be inlaid with snap ring and seal ring between the internal face of fittings body and nut inner hole and the outer wall of connected tube, snap ring rear end outer wall is shaped on male cone (strobilus masculinus), seal ring front end endoporus is shaped on inner conical surface, snap ring rear end male cone (strobilus masculinus) engages with seal ring front end inner conical surface, and the obvolvent of snap ring internal face is on the outer wall of connected tube.

Snap ring front end of the present utility model is shaped on male cone (strobilus masculinus), and rear end endoporus inner peripheral surface is shaped on cutting edge, and nut front end endoporus is shaped on inner conical surface, and snap ring front end male cone (strobilus masculinus) engages with nut front end inner conical surface.

Fittings body front end endoporus of the present utility model is shaped on inner conical surface, and seal ring rear end outer wall is shaped on male cone (strobilus masculinus), and fittings body front end inner conical surface engages with seal ring rear end male cone (strobilus masculinus).

Seal ring of the present utility model is composited by front end eyelet and rear end rubber ring, and the periphery of eyelet has a thin rubber layer again, and rubber ring is the rubber conical ring that protrude the rear end.

During use, the snap ring predetermined fixed is on connected tube, and the axially locating that forms snap ring is with fixing.Snap ring rear end male cone (strobilus masculinus) engages with seal ring front end inner conical surface.It is fashionable that nut is twisted, and seal ring rises under the effect of the power of snap ring greatly, the screw thread path of outer circumferential face gland nut, and realization nut locking, inner peripheral surface compresses snap ring and helps snap ring and fix.The rubber conical ring of compound seal ring rear end is installed the back and is compressed by connected tube periphery and fittings body front end inner conical surface appropriateness, forms good sealing.

Compare with Bite type fittings, the utlity model has following advantage:

1, sealing is reliable.Sealing is realized by the rubber conical ring that is compounded in the eyelet end face.Rubber conical ring appropriateness under the extruding of connected tube periphery and fittings body inner conical surface in back is installed to be compressed.Because the effect of eyelet, the extruding force of rubber conical ring only depends on the physical dimension of rubber seal ring and fittings body associated, and is irrelevant with the size of the screw-down torque of nut, makes the cone seal ring keep the better elastic state for a long time, realizes sealing reliably.

2, join strength height.Because the snap ring Inner Front End has cutting edge, snap ring is on connected tube fixedly the time, the cutting edge of snap ring endoporus inner peripheral surface is in the nut axial force and compress under the radial force effect of frock inner conical surface and cut pipe, and produce certain plastic deformation, make the snap ring lock ring on connected tube, after the seal ring fastening nut is installed, snap ring rear end male cone (strobilus masculinus) is subjected to the obvolvent of gold ring front end inner conical surface, make snap ring can bear very big axial force and do not come off from connected tube, this power of test result reaches 26KN, has guaranteed the join strength of fittings body and pipe way.

3, locking mechanism is reasonable.Strengthen the most effective locking this kind principle that adopted just of anti-loose ability of nut.Between snap ring and fittings body, increase a seal ring that is embedded with eyelet, between eyelet periphery and screw thread path one deck rubber is arranged, increased the friction factor between eyelet and nut path, eyelet rises under the snap ring thrust greatly, periphery gland nut path, thus the anti-loose ability of nut improved effectively.

4, mounting or dismounting are convenient.Since the clasp type joint can with the turnable joint, multiple textural association such as articulation uses, and can simplify installation, makes more flexible, the more compact structure of Placement.

Fig. 1 is a general structure schematic representation of the present utility model.

Fig. 2 is a snap ring structural representation of the present utility model.

Fig. 3 is a seal ring structure schematic representation of the present utility model.

Fig. 4 is a scheme of installation of the present utility model.

Fig. 5 is the pipe joint erection drawing that clasp type and turnable are combined into.

Fig. 6 is the pipe joint erection drawing that clasp type and hinge are combined into.

Below in conjunction with accompanying drawing the utility model being done one describes in detail:

As Fig. 1, a kind of clasp type pipe joint mainly is made up of fittings body 1, nut 4, snap ring 3 and seal ring 2.Snap ring 3 and seal 2 and be embedded between the outer wall of the internal face of fittings body 1 and nut 4 endoporus and connected tube 5.Snap ring 3 internal face obvolvents are on the outer wall of connected tube 5.

As Fig. 2, snap ring 3 rear end outer wall are shaped on male cone (strobilus masculinus) 3-2, and the endoporus inner peripheral surface is shaped on cutting edge 3-3, and the front end outer wall is shaped on male cone (strobilus masculinus) 3-1.The axial angle α of male cone (strobilus masculinus) 3-2 is 10-16 °, and the axial angle β of male cone (strobilus masculinus) 3-1 is 40-50 °.

As Fig. 3, seal ring 2 is composited by front end eyelet 2-1 and rear end rubber ring 2-2.The compound thin rubber layer 2-3 of the periphery of eyelet 2-1, eyelet 2-1 front end endoporus is shaped on inner conical surface 2-4.Rubber ring 2-2 is the rubber conical ring that protrude the rear end.

As Fig. 4, fittings body 1 front end endoporus is shaped on inner conical surface 1-1, and the axial angle gamma of inner conical surface 1-1 is 12-16 °.Nut 4 front ends are shaped on inner conical surface 4-1.

During cooperation, snap ring 3 is fixed on the connected tube 5, and snap ring rear end male cone (strobilus masculinus) 3-2 engages with seal ring front end inner conical surface 2-4, and seal ring rear end male cone (strobilus masculinus) 2-2 engages with fittings body front end inner conical surface 1-1; Snap ring front end male cone (strobilus masculinus) 3-1 engages with nut 4 front end inner conical surface 4-1.

As Fig. 4, during assembling, nut 4 snap rings 3 are contained on the connected tube 5 successively, adopt special frock that snap ring 3 rear end male cone (strobilus masculinus) 3-2 are executed radial force, 3 front end male cone (strobilus masculinus) 3-1 execute axial force to snap ring, and this moment, the cutting edge 3-3 of snap ring cut connected tube 5 peripheries, and plastic deformation takes place the rear end male cone (strobilus masculinus) 3-2 of snap ring simultaneously, (degree of depth is 0.1～0.15mm), forms the axially locating of snap ring 3 on connected tube 5 and fixing to make cutting edge embed connected tube 5 peripheries securely.Seal ring 2 fastening nuts 4 are installed, this moment, snap ring 3 rear end male cone (strobilus masculinus) 3-2 engaged with the eyelet 2-1 front end inner conical surface 2-4 of seal ring 2, eyelet elasticity under snap ring axially promotes rises greatly, form obvolvent on the one hand, guaranteed the axial restraint between snap ring and connected tube snap ring rear end male cone (strobilus masculinus) 3-2; The elasticity screw thread path that rises eyelet periphery gland nut big on the other hand, the thin rubber layer 2-3 of its eyelet periphery increased friction factor again, makes nut have good anti-loosening property.The appropriateness of the rubber conical ring 2-2 of seal ring 2 rear ends compresses, and forms sealing reliably.

The utility model also can be used in combination with the fittings body of other form such as the turnable joint of Fig. 5, the articulation of Fig. 6.

The turnable joint part of Fig. 5 is formed 4, baffle ring 6 and seal ring 7 is housed between fittings body and nut by fittings body 1, nut, and the cone angle of its male cone (strobilus masculinus) is consistent with the inner conical surface of clasp type fittings body, and the turnable joint is directly linked to each other with the clasp type joint.

The utility model can be applied in the interface of all parts (as valve, container etc.) that pipe-line system is connected with pipeline.

Claims

1, a kind of clasp type pipe joint, comprise fittings body (1) and nut (4), it is characterized in that being inlaid with snap ring (3) and seal ring (2) between the outer wall of the internal face of fittings body (1) and nut (4) endoporus and connected tube (5), snap ring (3) rear end outer wall is shaped on male cone (strobilus masculinus) (3-2), seal ring (2) front end endoporus is shaped on inner conical surface (2-4), snap ring rear end male cone (strobilus masculinus) (3-2) engages with seal ring front end inner conical surface (2-4), and snap ring (3) inwall obvolvent is on the outer wall of connected tube (5).

2, a kind of clasp type pipe joint according to claim 1, it is characterized in that snap ring (3) front end outer wall is shaped on male cone (strobilus masculinus) (3-1), rear end endoporus inner peripheral surface is shaped on cutting edge (3-3), nut (4) front end is shaped on inner conical surface (4-1), and snap ring front end male cone (strobilus masculinus) (3-1) engages with nut front end inner conical surface (4-1).

3, a kind of clasp type pipe joint according to claim 1, it is characterized in that fittings body (1) front end endoporus is shaped on inner conical surface (1-1), seal ring (2) rear end outer wall is shaped on male cone (strobilus masculinus) (2-2), and fittings body front end inner conical surface (1-1) engages with seal ring rear end male cone (strobilus masculinus) (2-2).

4, according to one of them described a kind of clasp type pipe joint of claim 1-3, it is characterized in that seal ring (2) is composited by front end eyelet (2-1) and rear end rubber ring (2-2), the periphery of eyelet (2-1) is compounded with a thin rubber layer (2-3), the rubber conical ring that rubber ring (2-2) protrudes for the rear end.

5, a kind of clasp type pipe joint according to claim 1 and 2, the axial angle α that it is characterized in that snap ring rear end male cone (strobilus masculinus) (3-2) is 10～16 °.

6, a kind of clasp type pipe joint according to claim 2, the axial angle β that it is characterized in that snap ring front end male cone (strobilus masculinus) (3-1) is 40～50 °.

7, a kind of clasp type pipe joint according to claim 3, the axial angle gamma that it is characterized in that fittings body front end inner conical surface (1-1) is 12～16 °.