CN101303098A - Seal structure of joint for pipe fittings - Google Patents
Seal structure of joint for pipe fittings Download PDFInfo
- Publication number
- CN101303098A CN101303098A CNA2008100619336A CN200810061933A CN101303098A CN 101303098 A CN101303098 A CN 101303098A CN A2008100619336 A CNA2008100619336 A CN A2008100619336A CN 200810061933 A CN200810061933 A CN 200810061933A CN 101303098 A CN101303098 A CN 101303098A
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- sealing
- ring
- pipe fitting
- fitting joint
- seal ring
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Abstract
The invention provides a sealing structure for pipe joints, which belongs to the mechanical technical field. The sealing structure solves the problems of rather bad universality and troublesome installation that existing sealing structure can not be used universally in angle sealing and plane sealing and sealing fittings need to be replaced. The sealing structure of the pipe joint is arranged between the pipe joint and a connector; external screw thread is grooved at the connecting end of the pipe joint which is connected with the connector through thread; a shoulder is arranged at the root of the external screw thread of the pipe joint and the connecting place of the connector is provided with a sealing end face; a seal ring and a bead flange are sheathed on the pipe joint, which are arranged between the sealing end face and the shoulder, and the seal ring is positioned at the inner side of the bead flange. The sealing structure adopts double-sealing structure of seal ring and bead ring in plane sealing, with good sealing effect; in angle sealing, only the bead flange needs to be taken down and no other sealing parts need to be replaced, thereby having simple structure, convenient installation, strong universality and wide application range.
Description
Technical field
The invention belongs to field of mechanical technique, relate to a kind of pipe fittings, particularly a kind of sealing configuration when being used for pipe fitting and connecting.
Background technique
Sealing configuration especially when various pipe fittings connect, can prevent phenomenons such as joint leaks, leakage of oil, gas leakage, so be widely used because can play seal action in various connection procedures in daily life or commercial Application.
Sealing configuration when at present common pipe fitting connects, for being connected with seal ring between the two pipe fittings or between pipe fitting joint and the pipe fitting, seal ring forms sealing after being squeezed into.The Chinese patent application application number be 03210617.3 authorize publication number be CN2639662Y patent disclosure " a kind of fast holding pipe joint assembly of lubrication system ", comprise joint, O RunddichtringO, lining, pad, pawl card; Be contained in and be connected in the outer joint of nylon pipe, the end face that lining, lining are housed on the step surface of O RunddichtringO, joint interior edge face is housed from left to right successively to be equipped with its inner ring of separating with pad and to have five equilibrium outwards to protrude the pawl card of spring sheet, the nylon pipe external diameter is greater than the control diameter of spring sheet free state, the joint external port extruding of pawl card one end is closed up, joint near pawl card one end has screw thread outward, is with another O RunddichtringO in the undercut groove of screw thread.
The pipe joint of this structure has made things convenient for the pipe fitting with internal thread and has cooperated, but the pipe joint of this structure is suitable for the angle sealing, and during for the needs plane sealing, its sealing is relatively poor.For making two pipe fittings that connect when connecting, have close better envelope effect, usually select the method for changing Sealing for use, as select flat packing ring for use, so this sealing configuration versatility in practical operation is relatively poor, be not easy to the switching between angle sealing and the plane sealing, production and application that influence is actual.
Summary of the invention
The objective of the invention is the problems referred to above, the sealing configuration of the pipe fitting joint of a kind of simple in structure, easy for installation, highly versatile and applied range is provided at existing sealing configuration.
Purpose of the present invention can realize by following technical proposal: a kind of sealing configuration of pipe fitting joint, be located between pipe fitting joint and the connecting body, connecting end at pipe fitting joint has outside thread, pipe fitting joint is connected with described connecting body by screw thread, the outside thread root of described pipe fitting joint is provided with convex shoulder, the joint of described connecting body has seal face, it is characterized in that, be with seal ring and back-up ring on the described pipe fitting joint, above-mentioned seal ring and back-up ring all are arranged between described seal face and the described convex shoulder, and seal ring is positioned at the inboard of back-up ring.
The sealing configuration of this pipe fitting joint, be used for improving the sealability of pipe fitting joint and connecting body, be located at pipe fitting joint and with pipe fitting joint by between the connecting body that is threaded, need before pipe fitting joint and connecting body connection, earlier seal ring is enclosed within the pipe fitting joint thread root, be resisted against on the convex shoulder of pipe fitting joint, again with the outside of shield ring sleeve at seal ring.After seal ring and back-up ring all set, the externally threaded connecting end of having of pipe fitting joint is assembled on the connecting body, make the seal face of seal ring and connecting body form sealing.The back-up ring that is located at the seal ring outside plays a supportive role to seal ring, and the amount of deformation of seal ring can be controlled at optimum range, and pipe fitting joint and connecting body are played the double seal effect.
In the sealing configuration of above-mentioned pipe fitting joint, the thickness of described back-up ring is less than the thickness of seal ring.Amount of deformation and sealing effect according to seal ring, the thickness of back-up ring is arranged to thickness less than seal ring, and when making the compacted sealing of seal ring, back-up ring forms metallic packing ring, play the double seal effect, make this sealing configuration have inner preferably bearing capacity.
In the sealing configuration of above-mentioned pipe fitting joint, be provided with circular groove between the convex shoulder of described pipe fitting joint and the thread root, above-mentioned seal ring is enclosed within on this circular groove.This circular groove adds at screw thread and not only plays the withdrawing effect man-hour, also seal ring is played the role of positioning, and prevents that seal ring is in axial sliding on pipe joint.
In the sealing configuration of above-mentioned pipe fitting joint, described seal ring is an O-ring seals.Adopt the seal ring and the back-up ring of O shape to be used, have the better seal effect when making plane sealing; And when taking off back-up ring, can directly carry out the angle sealing easily with O-ring seals.
Compared with prior art, the sealing configuration of pipe fitting joint of the present invention has following advantage:
1, adopt O-ring seals to add the double-sealing technology of back-up ring, in O-ring seals pressurized tightening seal, back-up ring forms metallic packing ring, so when plane sealing, have dual sealing effect, makes this sealing configuration have better inner bearing capacity.
2, this sealing configuration has the dual functions of angle sealing and plane sealing, when plane sealing, can directly seal use, need only take down back-up ring when sealing and get final product, so sealing configuration highly versatile, the applied range of this pipe fitting joint are easy to the installation of daily various pipe fittings at the angle.
3, the sealing configuration of this pipe fitting joint is made up of back-up ring and O-ring seals, and both can independently produce in enormous quantities, and cost of production are lower for independently individual.
Description of drawings
Fig. 1 is the three-dimensional exploded perspective view of the sealing configuration of pipe fitting joint of the present invention.
Fig. 2 be pipe fitting joint of the present invention sealing configuration be used for plane sealing the time cross-sectional view.
Fig. 3 be pipe fitting joint of the present invention sealing configuration be used for the angle cross-sectional view in when sealing.
Among the figure, 1, pipe fitting joint; 2, connecting body; 3, seal ring; 4, back-up ring; 5, convex shoulder; 6, seal face; 61, internal conical surface; 7, circular groove.
Embodiment
Below be specific embodiments of the invention and in conjunction with the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 1, the sealing configuration of pipe fitting joint of the present invention comprises seal ring 3 and back-up ring 4, be arranged on pipe fitting joint 1 and with connecting body 2 that pipe fitting joint 1 is connected between.
The connecting end of pipe fitting joint 1 has outside thread, the outside thread root is provided with convex shoulder 5, and is provided with a circular groove 7 between the root of this convex shoulder 5 and screw thread, and seal ring 3 is socketed on this circular groove 7, back-up ring 4 is socketed on the seal ring 3, and the inboard of back-up ring 4 is close on the seal ring 3.Because seal ring 3 is the O-ring seals of being made by rubber material,, can also be used to have the angle sealing of gradient so not only can be used for plane sealing.
As shown in Figure 2, the joint of the connecting body 2 that cooperates with pipe fitting joint 1 has a seal face 6, and sealing end face 6 is a plane, when pipe fitting joint 1 and connecting body 2 are used, seal ring 3 and back-up ring 4 be arranged on pipe fitting joint 1 convex shoulder 5 and and the seal face 6 of connecting body 2 between, after screwing pipe fitting joint 1, seal ring 3 pressurizeds are close on the seal face 6, form sealing with seal face, back-up ring 4 also directly was resisted against on the seal face 6 of connecting body 2 and formed metallic packing ring this moment, and the double seal effect of playing is sealed on the plane.
As shown in Figure 3, when sealing configuration is used for angle sealing, this moment, the seal face 6 that has of joint of connecting body 2 was a plane and an internal conical surface 61 that links to each other with this plane.And sealing configuration need only take off the back-up ring 4 in seal ring 3 outsides, again pipe fitting joint 1 and connecting body 2 are cooperated, this moment seal ring 3 be arranged on pipe fitting joint 1 convex shoulder 5 and and the internal conical surface 61 of the seal face 6 of connecting body 2 between, after screwing pipe fitting joint 1, form the angle after seal ring 3 is acted on by convex shoulder 5 and internal conical surface 61 simultaneously and seal.
Sealing configuration of the present invention can be directly used on the plane sealing, also can be used for the angle sealing after removing back-up ring 4.Because the sealing structure is when being used for the sealing of plane sealing or angle, need not to be replaced with again other seal fitting, when being used for the angle sealing, only need take off back-up ring 4 and can use, so it is simple to operate when mounted, its highly versatile, applied range are easy to the installation of daily various pipe fittings.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used terms such as pipe fitting joint 1, connecting body 2, seal ring 3, back-up ring 4, convex shoulder 5, seal face 6, internal conical surface 61, circular groove 7 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; They are construed to any additional restriction all is contrary with spirit of the present invention.
Claims (4)
1, a kind of sealing configuration of pipe fitting joint, be located between pipe fitting joint (1) and the connecting body (2), connecting end at pipe fitting joint (1) has outside thread, pipe fitting joint (1) is connected with described connecting body (2) by screw thread, the outside thread root of described pipe fitting joint (1) is provided with convex shoulder (5), the joint of described connecting body (2) has seal face (6), it is characterized in that, be with seal ring (3) and back-up ring (4) on the described pipe fitting joint (1), above-mentioned seal ring (3) and back-up ring (4) all are arranged between described seal face (6) and the described convex shoulder (5), and seal ring (3) is positioned at the inboard of back-up ring (4).
2, the sealing configuration of pipe fitting joint according to claim 1 is characterized in that, the thickness of described back-up ring (4) is less than the thickness of seal ring (3).
3, the sealing configuration of pipe fitting joint according to claim 1 and 2 is characterized in that, is provided with circular groove (7) between the convex shoulder (5) of described pipe fitting joint (1) and the thread root, and above-mentioned seal ring (3) is enclosed within on this circular groove (7).
4, the sealing configuration of pipe fitting joint according to claim 1 and 2 is characterized in that, described seal ring (3) is an O-ring seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100619336A CN101303098A (en) | 2008-05-27 | 2008-05-27 | Seal structure of joint for pipe fittings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100619336A CN101303098A (en) | 2008-05-27 | 2008-05-27 | Seal structure of joint for pipe fittings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101303098A true CN101303098A (en) | 2008-11-12 |
Family
ID=40113125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100619336A Pending CN101303098A (en) | 2008-05-27 | 2008-05-27 | Seal structure of joint for pipe fittings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101303098A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105056650A (en) * | 2015-07-15 | 2015-11-18 | 江苏新中环保股份有限公司 | Gas bag device of pulse-jet baghouse |
| CN109115824A (en) * | 2017-06-26 | 2019-01-01 | 中国石油化工股份有限公司 | Sample feeding rod for rock pyrolysis analysis |
-
2008
- 2008-05-27 CN CNA2008100619336A patent/CN101303098A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105056650A (en) * | 2015-07-15 | 2015-11-18 | 江苏新中环保股份有限公司 | Gas bag device of pulse-jet baghouse |
| CN109115824A (en) * | 2017-06-26 | 2019-01-01 | 中国石油化工股份有限公司 | Sample feeding rod for rock pyrolysis analysis |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20081112 |