CN214405009U

CN214405009U - Corrugated pipe connecting joint

Info

Publication number: CN214405009U
Application number: CN202022633067.2U
Authority: CN
Inventors: 黄伟; 林爱素
Original assignee: Ningbo Tianxin Metal Hose Co ltd
Current assignee: Ningbo Tianxin Metal Hose Co ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-10-15
Anticipated expiration: 2030-11-13

Abstract

The utility model relates to a bellows attach fitting, this attach fitting include main joint, vice joint, and main joint one end is equipped with the external screw thread interface to through the internal screw thread interface screw thread locking connection of external screw thread interface with vice joint one end, the vice joint other end is equipped with the tube hole that is used for the cross-under bellows. The design key points are that a section of guide hole with gradually reduced caliber is formed from an internal thread interface to a tube hole in the auxiliary joint, a clamping ring component with one side opposite to the end part of the external thread interface of the main joint is arranged in the guide hole, and when the main joint is in locking connection with the auxiliary joint, the clamping ring component slides along the guide hole and the caliber of the clamping ring component is reduced to be limited by clamping with an annular groove of the corrugated tube in the auxiliary joint. Above-mentioned structure utilizes the extrusion deformation of snap ring subassembly to block the bellows to the anticreep performance is comparatively reliable.

Description

Corrugated pipe connecting joint

Technical Field

The utility model relates to a quick-operation joint is a bellows attach fitting.

Background

The quick connector is a connector for quickly connecting or disconnecting pipelines, and is widely applied to the field of gas-liquid conveying. The existing joints of some gas pipelines need frequent replacement or repair and replacement, so the joints are basically connected by adopting quick joints. The existing quick connector usually comprises a connector sleeve, a sealing sleeve and a locking sleeve, wherein the sealing sleeve inside the connector sleeve and a butted pipeline form expansion sealing by screwing the connector sleeve and the locking sleeve, and when the butted pipeline is a corrugated pipe, the sealing sleeve can effectively expand the corrugated pipe when being extruded and expanded in the connector sleeve, so that the aim of preventing disengagement is fulfilled. However, the anti-dropping capability of the quick connection mode is limited, and when the gas-liquid pressure in the pipe is slightly higher, the risk of disengagement still exists. Therefore, the existing anti-falling structure of the quick joint needs to be improved.

Disclosure of Invention

In order to overcome the defects, the utility model aims to provide a corrugated pipe connecting joint for the field, which solves the technical problem that the reliability of the anti-disengaging structure of the existing similar corrugated pipe joint is not good enough. The purpose is realized by the following technical scheme.

The utility model provides a bellows attach fitting, this attach fitting includes main joint, vice joint, and main joint one end is equipped with the external screw thread interface to through the internal screw thread interface screw thread locking connection of external screw thread interface with vice joint one end, the vice joint other end is equipped with the tube hole that is used for the cross-under bellows. The auxiliary joint is internally provided with a guide hole with a section of gradually-reduced caliber from an internal thread interface to a pipe hole, a clamping ring component with one side opposite to the end part of the external thread interface of the main joint is arranged in the guide hole, and when the main joint is in locking connection with the auxiliary joint, the clamping ring component slides along the guide hole and the caliber of the clamping ring component is reduced to be limited by clamping with an annular groove of the corrugated pipe in the auxiliary joint. Above-mentioned structure utilizes the extrusion deformation of snap ring subassembly to block the bellows to the anticreep performance is comparatively reliable.

The snap ring subassembly includes the jump ring of open type to and along jump ring annular distribution and for the annular gliding at least two arc fixture blocks of snap ring, the external diameter of arc fixture block is equipped with the draw-in groove that inlays mutually with the jump ring slip, and each arc fixture block is equipped with the slip clearance along annular circumference under the initial condition. Through this kind of structure, rely on the slip of arc fixture block edge jump ring to the shrink deformation of cooperation jump ring, thereby can guarantee snap ring subassembly deformation range, make snap ring subassembly and bellows have sufficient card to stop the contact, guarantee the anticreep effect, also guarantee simultaneously that snap ring subassembly easily deforms, and is not fragile increase of service life.

The clamp spring is an elastic steel wire. Through this structure, the assembly is comparatively convenient, and the cost is lower.

The clamp spring is in a flat open-type annular sheet shape. Through this structure, have bigger area of contact between jump ring and the arc fixture block, guarantee that each arc fixture block reliably distributes along the annular.

And one side of the clamping groove of the arc-shaped clamping block is bent to limit the clamping spring in the clamping groove. Through this structure, prevent that the jump ring from deviating from the arc fixture block, guarantee the reliability of deformation.

The outer diameter of the arc-shaped clamping block is provided with a guide surface matched with the gradual change of the guide hole in the auxiliary joint, the inner diameter of the arc-shaped clamping block is provided with an arc-shaped flange protruding along the radial direction, and the arc-shaped flange is clamped and limited with the annular groove of the corrugated pipe in the auxiliary joint when the diameter of the clamping ring assembly is reduced. Through this structure, further improve the reliability that arc fixture block and bellows stopped.

The arc-shaped flange of the arc-shaped clamping block is a tooth-shaped flange. Through the structure, the arc-shaped clamping block has better bending deformation performance, so that the clamping reliability of the arc-shaped clamping block and the corrugated pipe is improved.

The main joint is characterized in that a first sealing ring is arranged in the external thread connector of the main joint, the end face of the first sealing ring extends out of the end part of the external thread connector and is abutted against the end part of the snap ring assembly, and a stroke gap used for extruding the first sealing ring and expanding the end part of the sealing corrugated pipe is arranged between the snap ring assembly and the end part of the external thread connector in an initial state. Through the structure, reliable sealing connection is formed when the main joint and the auxiliary joint are connected with the corrugated pipe.

And an annular sealing groove is formed in the inner diameter of the pipe hole of the auxiliary joint, and a second sealing ring used for sealing a protective sleeve sleeved outside the corrugated pipe is arranged in the annular sealing groove. Through this structure, further improve the sealed effect that the bellows is connected.

The utility model discloses overall structure is comparatively simple, connects and uses comparatively convenient, efficiency, and anticreep performance preferred, long service life is fit for the quick-operation joint use as all kinds of bellows, or the institutional advancement of like product.

Drawings

Fig. 1 is a schematic sectional view of the connecting bellows according to the present invention.

Fig. 2 is a schematic view of the split structure of the snap ring assembly of the present invention.

Fig. 3 is a schematic structural diagram of the snap ring assembly of the present invention.

The sequence numbers and names in the figure are: 1. the main joint, 101, the external screw thread interface, 2, the auxiliary joint, 201, the internal screw thread interface, 202, the tube hole, 203, the guiding hole, 3, arc fixture block, 301, arc flange, 302, draw-in groove, 4, jump ring, 5, first sealing washer, 6, bellows, 7, second sealing washer, 8, protective case.

Detailed Description

The invention will now be further described with reference to the accompanying drawings.

As shown in fig. 1-3, the bellows joint connection includes a main joint 1, a sub-joint 2, a snap ring assembly, and a first seal ring 5, where one end of the main joint is an equipment connection end or a pipe connection end of an internal thread or an external thread, and the other end of the main joint is provided with an external thread interface 101 and is in thread locking connection with an internal thread interface 201 of one end of the sub-joint through the external thread interface, the other end of the sub-joint is provided with a pipe hole 202 for penetrating a bellows 6, an annular seal groove is formed in the inner diameter of the pipe hole, and a second seal ring 7 for sealing a protective sleeve 8 of an outer sleeve of the bellows is arranged in the seal groove. A section of guide hole 203 with a gradually-reduced caliber is formed from the internal thread interface to the pipe hole in the auxiliary joint, a snap ring component with one side opposite to the end part of the external thread interface of the main joint is arranged in the guide hole, and when the main joint is connected with the auxiliary joint in a locking mode, the snap ring component slides along the guide hole and the caliber of the snap ring component is reduced to be limited by clamping with an annular groove of the corrugated pipe in the auxiliary joint. The specific structure of snap ring subassembly does: the snap ring subassembly includes the jump ring 4 of open type, and the jump ring is the elasticity steel wire or is flat open type ring piece form to and distribute and for two piece at least arc fixture block 3 of snap ring annular slip along the jump ring annular, the external diameter of arc fixture block is equipped with the convex draw-in groove 302 that inlays mutually with the jump ring slip, and after the arc fixture block was packed into the draw-in groove, draw-in groove one side was buckled and is spacing the jump ring in the draw-in groove, and each arc fixture block was equipped with the slip clearance along annular circumference under the initial condition. The outer diameter of the arc-shaped clamping block is provided with a guide surface matched with the gradual change of the guide hole in the auxiliary joint, the inner diameter of the arc-shaped clamping block is provided with an arc-shaped flange 301 protruding along the radial direction, and the arc-shaped flange is clamped and limited with the annular groove of the corrugated pipe in the auxiliary joint when the diameter of the clamping ring assembly is reduced. When connecting the bellows, be equipped with first sealing washer 5 in the external screw thread interface of main joint, and first sealing washer terminal surface stretches out external screw thread interface tip and offsets the snap ring subassembly, under the initial condition, be equipped with the stroke clearance that is used for extrudeing first sealing washer and expands tight sealed bellows tip between snap ring subassembly and the external screw thread interface tip, when the first sealing washer of snap ring subassembly extrusion promptly, form reliable sealedly between the external screw thread interface of main joint and the bellows.

In order to further improve the deformation capability of the arc-shaped fixture block 3, the arc-shaped flange 301 of the arc-shaped fixture block is changed into a tooth-shaped flange, and a tooth-shaped gap is utilized, so that the arc-shaped fixture block has a better deformation effect.

The use method of the corrugated pipe connecting joint comprises the following steps: the end part of the corrugated pipe 6 is inserted along the pipe hole 202 of the auxiliary joint 2 and is tightly abutted to the first sealing ring 5 in the internal thread connector 101 of the main joint 1, then the main joint and the auxiliary joint are screwed, so that the clamping ring assembly is contracted to clamp the arc-shaped groove of the corrugated pipe, the first sealing ring is extruded to realize reliable sealing of the corrugated pipe, and the operation and the use are convenient and efficient.

The above contents are intended to illustrate the technical means of the present invention, and do not limit the technical scope of the present invention. Obvious modifications or substitutions for the present invention by a person of ordinary skill in the art in combination with the prior art also fall within the protection scope of the present invention.

Claims

1. A corrugated pipe connecting joint comprises a main joint (1) and an auxiliary joint (2), wherein one end of the main joint is provided with an external thread interface (101) and is in threaded locking connection with an internal thread interface (201) at one end of the auxiliary joint through the external thread interface, and the other end of the auxiliary joint is provided with a pipe hole (202) for connecting a corrugated pipe (6) in a penetrating manner; the anti-theft pipe joint is characterized in that a guide hole (203) with a gradually-reduced caliber is formed in the auxiliary joint (2) from the internal thread connector (201) to the pipe hole (202), a clamping ring component with one side opposite to the end part of the external thread connector (101) of the main joint (1) is arranged in the guide hole, and when the main joint is connected with the auxiliary joint in a locking mode, the clamping ring component slides along the guide hole and the caliber of the clamping ring component is reduced to be limited by the clamping of an annular groove of the corrugated pipe (6) in the auxiliary joint.

2. The corrugated pipe joint according to claim 1, wherein the snap ring assembly comprises an open-type snap spring (4) and at least two arc-shaped clamping blocks (3) which are distributed annularly along the snap spring and slide annularly relative to the snap ring, the outer diameter of each arc-shaped clamping block is provided with a clamping groove (302) which is slidably embedded with the snap spring, and each arc-shaped clamping block is provided with a sliding gap circumferentially along the ring in an initial state.

3. Bellows connection joint according to claim 2, wherein the circlip (4) is an elastic steel wire.

4. Bellows connection joint according to claim 2, wherein the circlip (4) is in the form of a flat open ring.

5. The corrugated pipe connecting joint according to claim 2, wherein one side of the clamping groove (302) of the arc-shaped clamping block (3) is bent to limit the clamping spring (4) in the clamping groove.

6. The corrugated pipe connecting joint according to claim 2, wherein the outer diameter of the arc-shaped fixture block (3) is provided with a guide surface gradually matched with the guide hole (203) in the secondary joint (2), the inner diameter of the arc-shaped fixture block is provided with an arc-shaped flange (301) which is protruded along the radial direction, and the arc-shaped flange is clamped and limited with the annular groove of the corrugated pipe (6) in the secondary joint when the diameter of the arc-shaped flange is reduced along with the diameter of the clamp ring assembly.

7. Bellows connection joint according to claim 6, wherein the arc-shaped flanges (301) of the arc-shaped dogs (3) are toothed flanges.

8. The corrugated pipe connecting joint according to claim 1, wherein a first sealing ring (5) is arranged in the external threaded connector (101) of the main joint (1), the end face of the first sealing ring extends out of the end of the external threaded connector and abuts against the snap ring assembly, and in an initial state, a stroke gap for extruding the first sealing ring and expanding and sealing the end of the corrugated pipe is arranged between the snap ring assembly and the end of the external threaded connector.

9. The bellows joint according to claim 1, wherein the bore (202) of the secondary joint (2) has an inner diameter provided with an annular seal groove, and a second seal ring (7) for sealing against a protective sleeve (8) of the bellows jacket is provided in the annular seal groove.