CN114893629A

CN114893629A - Dual-function composite pipe joint

Info

Publication number: CN114893629A
Application number: CN202210532741.9A
Authority: CN
Inventors: 董明
Original assignee: Dalian Xingang Hydraulic Pipe Fitting Co ltd
Current assignee: Dalian Xingang Hydraulic Pipe Fitting Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-08-12

Abstract

The invention discloses a dual-function composite pipe joint, and particularly relates to the technical field of pipe joints, which comprises a joint body, an O-shaped rubber sealing ring, an extrusion clamping sleeve and an extrusion nut, wherein the O-shaped rubber sealing ring is arranged on the inner wall of the joint body, the extrusion clamping sleeve is arranged at one end of the joint body, one end of the extrusion clamping sleeve extends into the joint body, the outer side surface of one end, extending into the joint body, of the extrusion clamping sleeve is attached to the inner wall of one end of the joint body, the extrusion clamping sleeve is arranged on one side of the O-shaped rubber sealing ring, the extrusion nut is sleeved on the outer side of one end of the joint body, and the extrusion clamping sleeve is arranged in the extrusion nut. The invention has the advantages that the extrusion clamping sleeve plays a role in extruding and sealing the joint body and the pipe, the O-shaped rubber sealing ring is tightly attached to the outer end of the pipe for sealing, the two sealing forms are combined together, and the sealing effect is improved.

Description

Dual-function composite pipe joint

Technical Field

The invention relates to the technical field of pipe joints, in particular to a dual-function composite pipe joint.

Background

In fluid transfer and control systems, the most common method of connecting pipes to various components is by using pipe joints that are pressure resistant, tight, and oil and gas tight.

The common welding type pipe joint realizes elastic sealing by the elastic action of an O-shaped rubber ring, the pipe and the pipe joint need to be welded together when in use, the operation is troublesome, and the joint is not suitable for places where fire is not allowed particularly.

The ferrule type pipe joint is a pipe joint which has the advantages of simple operation, convenient use, no need of welding, high pressure resistance and long service life. The cutting edge of the cutting sleeve is used for occluding the outer diameter of the steel pipe and the outer edge of the cutting sleeve is used for extruding and sealing the inner conical surface of the joint, so that the cutting sleeve type pipe joint is particularly suitable for hydraulic pipelines. However, the air tightness of the extrusion seal is poor, pressure can not be always kept in airtight experiments, air mixed in a fluid pipeline is leaked due to the situation, and the phenomenon that the pipe joint leaks slowly in the later period is accompanied. Thus, a dual-function composite pipe joint is provided.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the dual-function composite pipe joint, the extrusion clamping sleeve has the extrusion sealing effect on the joint body and the pipe, the O-shaped rubber sealing ring is tightly attached to the outer end of the pipe for sealing, the two sealing forms are combined together, and the sealing effect is improved.

In order to achieve the purpose, the invention provides the following technical scheme: difunctional combined type coupling, including the joint body, O type rubber seal, extrusion cutting ferrule and squeeze nut, O type rubber seal establishes on the internal wall of joint body, the extrusion cutting ferrule is established in joint body one end, and extrudees cutting ferrule one end and extends into the internal portion that connects, the one end lateral surface that the extrusion cutting ferrule extends into in the joint body laminates mutually with joint body one end inner wall, the extrusion cutting ferrule is established in O type rubber seal one side, the squeeze nut cover is established in the external side of joint body one end, and extrudees the cutting ferrule and establish inside the squeeze nut.

In a preferred embodiment, the joint body is internally provided with a first cavity, a second cavity and a third cavity which are communicated with each other in sequence, the inner diameter of the second cavity is larger than that of the first cavity, the inner wall of the joint body is provided with a sealing ring mounting groove, the sealing ring mounting groove is arranged on the outer side of the second cavity and communicated with the second cavity, and the O-shaped rubber sealing ring is mounted inside the sealing ring mounting groove, so that the O-shaped rubber sealing ring can be mounted conveniently.

In a preferred embodiment, the third cavity inner wall is processed into the slope periphery that is 12 contained angles with joint body axial direction, extrude cutting ferrule one end and locate inside the third cavity, and extrude the one end lateral surface that the cutting ferrule is in the third cavity and process into the slope periphery that is 12 contained angles with extrusion cutting ferrule axial direction, third cavity inner wall and extrusion cutting ferrule one end lateral surface phase-match and laminating, extrude the cutting ferrule to play extrusion sealing effect between joint body and the pipe, sealed effect is good.

In a preferred embodiment, communicating first cavity, second cavity, third cavity have been seted up in proper order to extrusion nut inside, first cavity, second cavity, third cavity internal diameter reduce in proper order, joint body one end is established inside first cavity, and the joint body one end outside and first cavity inner wall threaded connection, the laminating of extrusion cutting ferrule other end outside and second cavity inner wall, extrusion nut extrusion cutting ferrule makes the extrusion cutting ferrule play the extrusion sealing effect to between joint body and the pipe.

In a preferred embodiment, one end of the pipe passes through the third cavity and is arranged in the second cavity, and the O-shaped rubber sealing ring, the extrusion clamping sleeve and the extrusion nut are sleeved at the outer end of the pipe.

The invention has the technical effects and advantages that:

the pipe is inserted into the joint body, the extrusion clamping sleeve is sleeved on the pipe, the extrusion nut is sleeved on the pipe and screwed on the joint body, the extrusion nut extrudes the extrusion clamping sleeve to enable the outer end of the extrusion clamping sleeve to move axially along the inner wall of the third cavity to be embedded into the outer wall of the pipe, the extrusion clamping sleeve plays a role in extruding and sealing between the joint body and the pipe, the pressure bearing capacity is high, the pipe cannot be pulled out, meanwhile, the O-shaped rubber sealing ring in the joint body clings to the outer end of the pipe, the elastic sealing effect of the O-shaped rubber sealing ring is good, particularly, the air-tight effect is better, and the only leakage point of the joint body and the pipe can be thoroughly blocked.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a block diagram of the fitting body of the present invention;

FIG. 3 is a diagram of the extrusion ferrule of the present invention;

fig. 4 is a structural view of a pressing nut of the present invention.

The reference signs are: 1, a connector body, 11 a first cavity, 12 a second cavity, 13 a third cavity and 14 sealing ring mounting grooves;

2O-shaped rubber sealing rings;

3, extruding the cutting sleeve;

4 extruding the nut, 41 a first cavity, 42 a second cavity and 43 a third cavity;

5, a pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the invention provides a dual-function composite pipe joint designed by combining two sealing forms, which comprises a joint body 1, an O-shaped rubber sealing ring 2, an extrusion clamping sleeve 3 and an extrusion nut 4, wherein the O-shaped rubber sealing ring 2 is arranged on the inner wall of the joint body 1, the extrusion clamping sleeve 3 is arranged at one end of the joint body 1, one end of the extrusion clamping sleeve 3 extends into the joint body 1, the outer side surface of one end of the extrusion clamping sleeve 3 extending into the joint body 1 is attached to the inner wall of one end of the joint body 1, the extrusion clamping sleeve 3 is arranged on one side of the O-shaped rubber sealing ring 2, the extrusion nut 4 is sleeved on the outer side of one end of the joint body 1, and the extrusion clamping sleeve 3 is arranged in the extrusion nut 4.

As shown in fig. 2, a first cavity 11, a second cavity 12 and a third cavity 13 which are communicated with each other are sequentially formed in the joint body 1, the inner diameter of the second cavity 12 is larger than that of the first cavity 11, in order to facilitate installation of the O-shaped rubber seal ring 2, a seal ring installation groove 14 is formed in the inner wall of the joint body 1, the seal ring installation groove 14 is formed in the outer side of the second cavity 12 and communicated with the second cavity 12, the O-shaped rubber seal ring 2 is installed in the seal ring installation groove 14, and the O-shaped rubber seal ring 2 is sleeved on the outer end of the pipe 5; the joint body 1 is arranged on preassembly equipment, the pipe 5 with the end surface cleaned and the burr removed passes through the third cavity 13 of the joint body 1 and is inserted into the second cavity 12 and is inserted to the bottom, the O-shaped rubber sealing ring 2 is tightly attached to the outer end of the pipe 5, the O-shaped rubber sealing ring 2 has good elastic sealing effect, particularly better air-tight effect, and can completely block the only leakage point of the joint body 1 and the pipe 5, which is a sealing mode of the invention.

As shown in fig. 1-3, the pressing ferrule 3 is disposed on one side of the O-shaped rubber seal ring 2, the pressing ferrule 3 is disposed at the outer end of the pipe 5, one end of the pressing ferrule 3 is disposed inside the third cavity 13, the inner wall of the third cavity 13 is processed into an inclined circumferential surface having an angle of 12 ° with the axial center line of the connector body 1 (as shown in the front plan view of the connector body 1 in fig. 2, an auxiliary line a is formed along the inner wall of the third cavity 13, an acute angle between a and B is 12 °), the outer side surface of one end of the pressing ferrule 3 in the third cavity 13 is processed into an inclined circumferential surface having an angle of 12 ° with the axial center line of the pressing ferrule 3 (as shown in the front plan view of the pressing ferrule 3 in fig. 3, an auxiliary line C is formed along the outer side of one end of the pressing ferrule 3, and an acute angle between C and D is 12 °), the inner wall of the third cavity 13 is matched and attached with the outer side surface of one end of the extrusion clamping sleeve 3; the extrusion cutting sleeve 3 plays a role in extrusion sealing between the connector body 1 and the pipe 5, bears high pressure and prevents the pipe 5 from being pulled out, and the extrusion cutting sleeve is another sealing form of the invention.

As shown in fig. 1 and 4, a first cavity 41, a second cavity 42 and a third cavity 43 which are communicated with each other are sequentially arranged inside the extrusion nut 4, the inner diameters of the first cavity 41, the second cavity 42 and the third cavity 43 are sequentially reduced, one end of the connector body 1 is arranged inside the first cavity 41, the outer side of one end of the connector body 1 is in threaded connection with the inner wall of the first cavity 41, the outer side of the other end of the extrusion clamping sleeve 3 is attached to the inner wall of the second cavity 42, one end of the pipe 5 penetrates through the third cavity 43 and the third cavity 13 and is arranged in the second cavity 12, the extrusion nut 4 is arranged at the outer end of the pipe 5 in a sleeved mode, after the pipe 5 is inserted into the connector body 1, the extrusion nut 4 is sleeved on the pipe 5 and screwed on the connector body 1, and the extrusion nut 4 extrudes the extrusion clamping sleeve 3 to enable the extrusion clamping sleeve 3 to play a role in extrusion sealing between the connector clamping sleeve body 1 and the pipe 5.

The working principle is as follows: when in use, the joint body 1 is arranged on pre-assembly equipment, the pipe 5 with the end surface cleaned and the burr removed passes through the third cavity 13 of the joint body 1 and is inserted into the second cavity 12 and is inserted to the bottom, then the extrusion cutting sleeve 3 is sleeved on the pipe 5, one end of the extrusion cutting sleeve 3 is inserted into the third cavity 13, then the extrusion nut 4 is sleeved on the pipe 5 and is screwed on the joint body 1, the extrusion nut 4 extrudes the extrusion cutting sleeve 3 to enable the outer end of the extrusion cutting sleeve 3 to move axially along the inner wall of the third cavity 13 and be embedded into the outer wall of the pipe 5, the extrusion cutting sleeve 3 plays a role in extrusion sealing between the joint body 1 and the pipe 5, the pressure bearing capacity is high, the pipe 5 is not pulled out, meanwhile, the O-shaped rubber sealing ring 2 in the joint body 1 is tightly attached to the outer end of the pipe 5, the elastic sealing effect of the O-shaped rubber sealing ring 2 is good, particularly, the air-tight effect is better, the only leakage point of the joint body 1 and the pipe 5 can be thoroughly blocked, the invention combines two sealing forms together, thereby improving the sealing effect.

And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. The double-function composite pipe joint is characterized in that: including joint body (1), O type rubber seal (2), extrusion cutting ferrule (3) and extrusion nut (4), establish on joint body (1) inner wall O type rubber seal (2), extrusion cutting ferrule (3) are established in joint body (1) one end, and extrude cutting ferrule (3) one end and extend into and connect inside body (1), one end lateral surface that extrusion cutting ferrule (3) extend into and connect in body (1) is laminated with joint body (1) one end inner wall mutually, establish in O type rubber seal (2) one side extrusion cutting ferrule (3), extrusion nut (4) cover is established in the body (1) one end outside that connects, and extrudees cutting ferrule (3) and establish inside extrusion nut (4).

2. The dual function composite pipe joint according to claim 1, wherein: connect body (1) inside and seted up communicating first cavity (11), second cavity (12), third cavity (13) in proper order, second cavity (12) internal diameter is greater than first cavity (11) internal diameter, connect body (1) inner wall and seted up sealing washer mounting groove (14), and sealing washer mounting groove (14) establish in the second cavity (12) outside and with second cavity (12) intercommunication, O type rubber seal (2) are installed inside sealing washer mounting groove (14).

3. The dual function composite pipe joint of claim 2, wherein: the inner wall of the third cavity (13) is processed into an inclined circumferential surface which forms an included angle of 12 degrees with the axial center line of the joint body (1).

4. The dual function composite pipe joint according to claim 3, wherein: inside third cavity (13) was located to extrusion cutting ferrule (3) one end, and extrusion cutting ferrule (3) are in the one end lateral surface in third cavity (13) and process into and extrude cutting ferrule (3) axial direction and be the slope periphery of 12 contained angles, third cavity (13) inner wall and extrusion cutting ferrule (3) one end lateral surface phase-match and laminating.

5. The dual function composite pipe joint according to claim 4, wherein: communicating first cavity (41), second cavity (42), third cavity (43) have been seted up in proper order to extrusion nut (4) inside, first cavity (41), second cavity (42), third cavity (43) internal diameter reduce in proper order, connect body (1) one end to establish inside first cavity (41), and connect the body (1) one end outside and first cavity (41) inner wall threaded connection, the laminating of extrusion cutting ferrule (3) other end outside and second cavity (42) inner wall.

6. The dual function composite pipe joint according to claim 5, wherein: one end of the pipe (5) penetrates through the third cavity (43) and the third cavity (13) to be arranged in the second cavity (12), and the O-shaped rubber sealing ring (2), the extrusion clamping sleeve (3) and the extrusion nut (4) are all sleeved at the outer end of the pipe (5).