CN211344399U

CN211344399U - Metal expansion joint

Info

Publication number: CN211344399U
Application number: CN201921874530.3U
Authority: CN
Inventors: 宋文锋; 李中平
Original assignee: Yangzhou Boruige Machinery Co ltd
Current assignee: Yangzhou Boruige Machinery Co ltd
Priority date: 2019-11-02
Filing date: 2019-11-02
Publication date: 2020-08-25
Anticipated expiration: 2029-11-02

Abstract

The utility model discloses a metal expansion joint, including interior metal sleeve, outer metal sleeve and tubular metal resonator, interior metal sleeve's middle part is the inflation arch, the lateral wall at interior metal sleeve's both ends is equipped with first external screw thread, the one end inside wall of tubular metal resonator is equipped with the first internal thread with first external screw thread assorted, interior metal sleeve's both ends are respectively through first interior external thread connection with the one end of tubular metal resonator, the outside of interior metal sleeve and tubular metal resonator is equipped with outer metal sleeve, the inside wall at outer metal sleeve both ends is equipped with the second internal thread, the one end lateral wall of tubular metal resonator be equipped with second internal thread assorted second external screw thread, outer metal sleeve's both ends pass through interior external thread connection of second with the one end of tubular metal resonator respectively, the other end welding of tubular metal resonator has the flange. The utility model discloses can cushion interconnect metal pipeline's stress to reduce the destructive action of stress to metal pipeline.

Description

Metal expansion joint

Technical Field

The utility model belongs to the technical field of the pipeline annex, concretely relates to metal expansion joint.

Background

Along with the progress of industrialization, the demand of expansion joint also increases day by day, and the metal expansion can compensate the additional stress that arouses because of temperature difference and mechanical vibration, and metal pipeline under the high temperature operating mode can expand and produce stress, and metal pipeline can not flexible deformation, and the expansion leads to breaking easily, consequently needs a metal expansion joint can cushion interconnect's metal pipeline's stress to reach the destructive action that reduces stress to metal pipeline.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model provides a metal expansion joint can cushion interconnect metal conveying pipeline's stress to reach and reduce the destructive action of metal conveying stress to the pipeline.

The utility model discloses a realize through following technical scheme: the utility model provides a metal expansion joint, includes interior metal sleeve, outer metal sleeve and tubular metal resonator, interior metal sleeve's middle part is the inflation arch, the lateral wall at interior metal sleeve's both ends is equipped with first external screw thread, the one end inside wall of tubular metal resonator be equipped with first external screw thread assorted first internal thread, interior metal sleeve's both ends respectively with tubular metal resonator's one end is through first internal and external threaded connection, the outside of interior metal sleeve and tubular metal resonator is equipped with outer metal sleeve, the inside wall at outer metal sleeve both ends is equipped with the second internal thread, the one end lateral wall of tubular metal resonator be equipped with second internal thread assorted second external screw thread, outer metal sleeve's both ends respectively with tubular metal resonator's one end is through the internal and external threaded connection of second, the other end welding of tubular metal resonator has the flange.

Further, both ends of the inner side of the expansion bulge extend outwards smoothly.

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

1. the utility model adopts the design of the inner metal sleeve, the outer metal sleeve and the metal pipe, the two ends of the inner metal sleeve are respectively connected with one end of the metal pipe through the first inner and outer threads, the two ends of the outer metal sleeve are respectively connected with one end of the metal pipe through the second inner and outer threads, the first internal and external threads and the second internal and external threads are arranged in opposite directions, so that the metal pipe can rotate outwards at the two ends of the inner metal sleeve by the first internal and external threads under the pulling force caused by the transverse and longitudinal stress generated by expansion under the high-temperature working condition, further buffering the stress of the metal conveying pipelines connected with each other, thereby reducing the damage effect of the stress on the metal conveying pipelines, and the second internal and external threads and the first internal and external threads are reversely arranged, so that the metal pipe is more and more fastened by outwards rotating and displacing at the two ends of the outer metal sleeve, and the tightness of the metal expansion joint are ensured.

2. The utility model discloses an inner metal sleeve's middle part is the protruding design of inflation for when the fluid got into the inflation protruding, because the pipe diameter grow, and then made the velocity of flow of fluid reduce, thereby reduced because the too fast vibration that produces of fluid velocity of flow, prevented that the vibration from making metal expansion joint and metal pipeline's junction produce not hard up.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the drawings: 1. an inner metal sleeve; 2. an outer metal sleeve; 3. a metal tube; 4. a flange; 5. and (4) expanding the bulge.

Detailed Description

A metal expansion joint as shown in fig. 1 in the drawings of the specification, including inner metal sleeve 1, outer metal sleeve 2 and tubular metal resonator 3, the middle part of inner metal sleeve 1 is expansion protrusion 5, the lateral wall at the both ends of inner metal sleeve 1 is equipped with first external screw thread, the one end inside wall of tubular metal resonator 3 is equipped with the first internal thread that matches with first external screw thread, the both ends of inner metal sleeve 1 are respectively through first interior thread connection with tubular metal resonator 3's one end, the outside of inner metal sleeve 1 and tubular metal resonator 3 is equipped with outer metal sleeve 2, the inside wall at the both ends of outer metal sleeve 2 is equipped with the second internal thread, the one end outside wall of tubular metal resonator 3 is equipped with the second external screw thread that matches with the second internal thread, the both ends of outer metal sleeve 2 are respectively through second interior thread connection with tubular metal resonator 3's one end, the other end welding of tubular metal resonator 3 has.

When the working condition temperature is too high, the first internal and external threads enable the metal pipe 3 to rotate and displace outwards at the two ends of the inner metal sleeve 1 so as to buffer the stress of the metal conveying pipelines connected with each other, and the first internal and external threads and the second internal and external threads are arranged in opposite directions, so that the metal pipe 3 is more fastened when rotating and displacing outwards at the two ends of the outer metal sleeve 2, and the fastening performance and the sealing performance of the metal expansion joint are ensured; when the expansion bulge 5 makes the fluid enter the expansion bulge 5, the flow velocity of the fluid is reduced due to the increase of the pipe diameter, so that the vibration generated due to the too fast flow velocity of the fluid is reduced, and the vibration is prevented from loosening the joint of the metal expansion joint and the metal conveying pipeline.

The two ends of the inner side of the expansion bulge 5 extend outwards smoothly, so that the eddy generated by the fluid is reduced, and the vibration frequency is further reduced.

In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the present invention, and all equivalent changes and modifications of the shapes, structures, features and spirit described in the claims of the present invention should be included in the scope of the present invention.

Claims

1. A metal expansion joint, characterized by: comprises an inner metal sleeve (1), an outer metal sleeve (2) and a metal pipe (3), wherein the middle part of the inner metal sleeve (1) is an expansion bulge (5), outer side walls at two ends of the inner metal sleeve (1) are provided with first external threads, one end inner side wall of the metal pipe (3) is provided with first internal threads matched with the first external threads, two ends of the inner metal sleeve (1) are respectively connected with one end of the metal pipe (3) through first internal and external threads, the outer sides of the inner metal sleeve (1) and the metal pipe (3) are provided with the outer metal sleeve (2), inner side walls at two ends of the outer metal sleeve (2) are provided with second internal threads, one end outer side wall of the metal pipe (3) is provided with second external threads matched with the second internal threads, two ends of the outer metal sleeve (2) are respectively connected with one end of the metal pipe (3) through second internal and external threads, and a flange (4) is welded at the other end of the metal pipe (3).

2. A metal expansion joint according to claim 1, wherein: the two ends of the inner side of the expansion bulge (5) extend outwards smoothly.