CN217843019U

CN217843019U - Anti-corrosion high-pressure air-tight seal threaded joint

Info

Publication number: CN217843019U
Application number: CN202221399976.7U
Authority: CN
Inventors: 陈道林; 方凌; 陈道怀; 祝俊; 奚华根; 唐久林; 倪勇军
Original assignee: Jiangsu Lincheng Electric Instrument Equipment Co ltd
Current assignee: Jiangsu Lincheng Electric Instrument Equipment Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-11-18
Anticipated expiration: 2032-06-07

Abstract

The utility model relates to a screwed joint technical field, and disclose a anticorrosive high-pressure seal screwed joint, solved screwed joint through long-time high pressure effect, its sealing performance can decline to can not reach the problem of the sealed requirement when using, it includes top connection, lower clutch and inner seal circle, top connection end department forms the joint groove, is formed with the internal thread in the joint groove, and lower clutch department forms the joint arch, is formed with the external screw thread of being connected with the internal thread screw thread on the joint arch, forms first inner groovy and second inner groovy in the joint groove, is formed with the first outer recess that corresponds with the first inner groovy and the second inner groovy that corresponds with the first inner groovy on the joint arch; the utility model discloses, the cooperation through the first sealed arch that sets up and first inclined plane etc. is used, can play multiple sealed effect through the sealed arch of second to the contact department of top connection with the lower clutch, can strengthen the sealing performance when the inner seal circle uses.

Description

Corrosion-resistant high-pressure-tightness threaded connector

Technical Field

The utility model belongs to the technical field of screwed joint, specifically be an anticorrosive high-pressure seal screwed joint.

Background

The threaded joint is a pipeline connecting piece with threads, is the most common pipe fitting in industry and life, and enables the connection of pipelines to be simpler and the disassembly and replacement to be easier, so that the cost of pipeline connection is greatly saved; wherein in the in-process of carrying out the transport to high-pressure gas, screwed joint also needs to be used to the junction of its pipeline, and plane extrusion when it passes through sealing washer cooperation threaded connection seals its threaded connection department, but through long-time high pressure effect, its sealing performance can descend to sealing requirement when can't reaching the use.

SUMMERY OF THE UTILITY MODEL

To the above situation, for overcoming prior art's defect, the utility model provides a screw joint is sealed to anticorrosive high pressure has effectually solved screw joint through long-time high pressure effect, and its sealing performance can decline to the problem of the sealed requirement when not reaching the use.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides an anticorrosive high-pressure seal screwed joint, includes top connection, lower clutch and inner seal circle, top connection end department forms the joint groove, connects the inslot to be formed with the internal thread, and lower clutch department forms the joint arch, connects to be formed with on the arch with internal thread threaded connection's external screw thread, connects the inslot to form first inner groovy and second inner groovy, connects to be formed with on the arch with the first outer recess that corresponds of first inner groovy and the outer recess of second that corresponds with first inner groovy.

Preferably, a first sealing bulge and a second sealing bulge are symmetrically formed on the inner sealing ring, the first sealing bulge is located between the first inner groove and the first outer groove, and the second sealing bulge is located between the second inner groove and the second outer groove.

Preferably, a first inclined plane is formed on the first sealing protrusion, and the shape of the first inner groove and the shape of the first outer groove are matched with the shape of the first sealing protrusion; the second sealing bulge is provided with a second inclined surface, and the shape of the second inner groove and the shape of the second outer groove are matched with the shape of the second sealing bulge.

Preferably, a third inner groove is formed in the outer wall of the end head of the upper joint, a third outer groove is formed in the lower joint, and an outer sealing ring is arranged between the third inner groove and the third outer groove.

Preferably, third sealing bulges are symmetrically formed on the outer sealing ring, a fourth inner groove is formed in the groove wall of the third inner groove, a fourth outer groove is formed in the groove wall of the third outer groove, and the fourth inner groove and the fourth outer groove are both arranged corresponding to the third sealing bulges.

Preferably, the upper joint and the lower joint are both made of stainless steel, and the inner sealing ring and the outer sealing ring are both made of hydrogenated nitrile rubber.

Compared with the prior art, the beneficial effects of the utility model are that:

1) In the work, the first sealing bulge, the second sealing bulge, the first inclined plane and the like are arranged to be matched for use, so that the contact part of the upper joint and the lower joint can be subjected to multiple sealing effects through the first sealing bulge and the second sealing bulge, and the sealing performance of the inner sealing ring in the use process can be enhanced through the use of the first inclined plane;

2) In the work, through the cooperation use of the outer sealing ring who sets up and third sealed arch etc. strengthen the sealing performance of top connection and lower clutch other end department to sealing performance between the two is further improved.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram in an embodiment of the present invention;

fig. 2 is a schematic view of an upper joint structure in an embodiment of the present invention;

fig. 3 is a schematic view of a lower joint structure in an embodiment of the present invention;

fig. 4 is a schematic structural view of an inner seal ring in an embodiment of the present invention;

fig. 5 is a schematic structural view of an outer sealing ring in an embodiment of the present invention;

in the figure: 1. an upper joint; 101. a joint groove; 102. an internal thread; 103. a first inner groove; 104. a second inner groove; 105. a third inner groove; 106. a fourth inner groove; 2. a lower joint; 201. a joint projection; 202. an external thread; 203. a first outer groove; 204. a second outer groove; 205. a third outer groove; 206. a fourth outer groove; 3. an inner seal ring; 301. a first seal projection; 302. a second seal projection; 4. an outer sealing ring; 401. a third sealing protrusion.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Embodiment one, is given by fig. 1-5, the utility model relates to an anticorrosive high-pressure gas seal screwed joint, including top connection 1, lower clutch 2 and interior sealing washer 3, top connection 1 end department forms joint groove 101, is formed with internal thread 102 in the joint groove 101, and lower clutch 2 end department forms joint arch 201, is formed with external screw thread 202 with internal thread 102 threaded connection on joint arch 201, forms first inner groovy 103 and second inner groovy 104 in the joint groove 101, is formed with first outer recess 203 corresponding with first inner groovy 103 and second outer recess 204 corresponding with first inner groovy 104 on joint arch 201; a first sealing bulge 301 and a second sealing bulge 302 are symmetrically formed on the inner sealing ring 3, the first sealing bulge 301 is positioned between the first inner groove 103 and the first outer groove 203, and the second sealing bulge 302 is positioned between the second inner groove 103 and the second outer groove 204;

when the double-seal joint is used, the upper joint 1 and the lower joint 2 are connected together in a threaded mode through the internal thread 102 in the joint groove 101 and the external thread 202 on the joint protrusion 201, the internal seal ring 3 is extruded by the internal thread and the external thread, so that the two first sealing protrusions 301 on the internal seal ring 3 respectively enter the corresponding first internal grooves 103 and the corresponding first external grooves 203, the two second sealing protrusions 302 on the internal seal ring 3 respectively enter the corresponding second internal grooves 104 and the corresponding second external grooves 204, and along with the extrusion, the double-seal effect is achieved at the contact position of the upper joint 1 and the lower joint 2.

In a further improvement, a first inclined plane is formed on the first sealing bulge 301, and the shape of the first inner groove 103 and the shape of the first outer groove 203 are matched with the shape of the first sealing bulge 301; a second inclined surface is formed on the second sealing bulge 302, and the shape of the second inner groove 104 and the shape of the second outer groove 204 are matched with the shape of the second sealing bulge 302;

can produce the extrusion from the corresponding first inclined plane of side face through first inner groove 103 and second outer recess 204 to make interior sealing washer 3 and the cell wall in close contact with of joint groove 101, produce the extrusion to second sealed protruding 302 through second inner groove 104 and second outer recess 204, thereby improve the laminating of second sealed protruding 302 and its contact surface, thereby further improve the sealing performance between top connection 1 and the lower clutch 2.

In a further improvement, a third inner groove 105 is formed in the outer wall of the end head of the upper joint 1, a third outer groove 205 is formed in the lower joint 2, and an outer sealing ring 4 is arranged between the third inner groove 105 and the third outer groove 205; third sealing bulges 401 are symmetrically formed on the outer sealing ring 4, a fourth inner groove 106 is formed on the groove wall of the third inner groove 105, a fourth outer groove 206 is formed on the groove wall of the third outer groove 205, and the fourth inner groove 106 and the fourth outer groove 206 are both arranged corresponding to the third sealing bulges 401;

the sealing performance at the end heads of the other ends of the upper joint 1 and the lower joint 2 can be enhanced through the outer sealing ring 4 and the third sealing bulge 401 thereon, so that the sealing performance between the upper joint 1 and the lower joint 2 is further improved.

The upper joint 1 and the lower joint 2 are both made of stainless steel materials and have good corrosion resistance, the inner sealing ring 3 and the outer sealing ring 4 are both made of hydrogenated nitrile rubber materials, and the high-pressure gas pipeline sealing ring has good corrosion resistance on the premise of elasticity and is convenient for high-pressure gas to pass through for a long time.

Claims

1. The utility model provides an anticorrosive high-pressure seal screwed joint, includes top connection (1), lower clutch (2) and interior sealing washer (3), a serial communication port, top connection (1) end department forms joint groove (101), is formed with internal thread (102) in joint groove (101), and lower clutch (2) end department forms joint arch (201), connects and is formed with external screw thread (202) with internal thread (102) threaded connection on arch (201), forms first inner groovy (103) and second inner groovy (104) in joint groove (101), connects and is formed with first outer recess (203) that correspond with first inner groovy (103) and the outer recess (204) of second that correspond with second inner groovy (104) on arch (201).

2. The corrosion-resistant high-pressure gas-tight threaded joint according to claim 1, wherein: a first sealing bulge (301) and a second sealing bulge (302) are symmetrically formed on the inner sealing ring (3), the first sealing bulge (301) is located between the first inner groove (103) and the first outer groove (203), and the second sealing bulge (302) is located between the second inner groove (104) and the second outer groove (204).

3. A corrosion resistant high pressure gas tight threaded joint as defined in claim 2 wherein: a first inclined plane is formed on the first sealing bulge (301), and the shape of the first inner groove (103) and the shape of the first outer groove (203) are matched with the shape of the first sealing bulge (301); the second sealing bulge (302) is provided with a second inclined surface, and the shape of the second inner groove (104) and the shape of the second outer groove (204) are matched with the shape of the second sealing bulge (302).

4. A corrosion resistant high pressure gas tight threaded joint as defined in claim 3 wherein: a third inner groove (105) is formed in the outer wall of the end of the upper joint (1), a third outer groove (205) is formed in the lower joint (2), and an outer sealing ring (4) is arranged between the third inner groove (105) and the third outer groove (205).

5. The corrosion-resistant high-pressure gas-tight threaded joint according to claim 4, wherein: third sealing bulges (401) are symmetrically formed on the outer sealing ring (4), a fourth inner groove (106) is formed in the groove wall of the third inner groove (105), a fourth outer groove (206) is formed in the groove wall of the third outer groove (205), and the fourth inner groove (106) and the fourth outer groove (206) are both arranged corresponding to the third sealing bulges (401).

6. The corrosion-resistant high-pressure gas-tight threaded joint according to claim 5, wherein: the upper joint (1) and the lower joint (2) are both made of stainless steel materials, and the inner sealing ring (3) and the outer sealing ring (4) are both made of hydrogenated nitrile rubber materials.