CN110440082A

CN110440082A - A kind of expansion joint

Info

Publication number: CN110440082A
Application number: CN201910748975.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Taizhou Tongli Machinery Co ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2019-11-12
Anticipated expiration: 2039-08-14
Also published as: CN110440082B

Abstract

The present invention relates to pipe fitting technical fields, specifically a kind of expansion joint, including No.1 end pipe, No. two end pipes, inner sleeve and sleeve connection structure, No.1 end pipe is set in the outside of No. two end pipes, inner sleeve is equipped in No. two end pipes, one end of inner sleeve is connect with No.1 end pipe, it is connected between No.1 end pipe and No. two end pipes by sleeve connection structure, No.1 end pipe includes No.1 connecting plate, No.1 outer sleeve and No.1 extension socket, No.1 connecting plate is fixedly connected on the outside of one end of No.1 outer sleeve, a kind of expansion joint of the present invention, pass through the setting of inner sleeve and three seals circle, No.1 sealing ring is equipped between No. two extension sockets and No.1 extension socket, No. two sealing rings are equipped between No.1 bulge loop and casing main body, No. three sealing rings are equipped between No. two bulge loops and two extra sleeves, and wind gathering cover draws with fluid It is opposite to enter direction, to reduce windage.

Description

A kind of expansion joint

Technical field

The present invention relates to pipe fitting technical field, specifically a kind of expansion joint.

Background technique

Expansion joint refers to the flexible member that can effectively act as compensation axial deformation effect, such as is welded on fixed tube sheet type Expansion joint axial direction flexibility on heat exchanger shell is big, is easily deformed, and it is hot swollen because wall temperature difference generates to can compensate for pipe and shell Swollen difference, reduces their axial load, to reduce the thermal (temperature difference) stress of pipe, tube sheet and shell, avoids causing strength failure, lose Steady destroy pulls destruction with pipe.

Casing expandable section is made of the internal and external casing that can make axial relative movement, close using stuffing-box between internal and external casing Envelope.Both ends pipe is kept to move on an axis when use, product mainly there are the groups such as sleeve (core pipe), shell, sealing material At axial stretching and axial rotation at any angle for compensating pipeline have the characteristics that compensation rate small in size is big and be suitable for Hot water, steam, grease type medium, the sliding motion by sliding sleeve to outer sleeve, reach the compensation of thermal expansion.

Casing expandable section is generally made of two section casings, between two section casings slidably, the sealing performance of casing expandable section It is determined completely by sealing material, existing casing expandable section is sealed only with single sealing structure, and hot water, steam, oil Granule foreign is easily carried in lipid medium, accumulation of impurities agglomerates in internal surface of casing, and when expansion joint is telescopic, agglomeration is easy The excessive deformation of sealing material is caused, to cause hot water, steam, grease type dielectric leakage, therefore single sealing structure is difficult to protect The leakproofness of casing expandable section is demonstrate,proved, furthermore, the length of existing casing expandable section is substantially stationary, can not be according to reality when being attached Border length is adjusted, this makes troubles to installment work.

Summary of the invention

For the problems of the prior art, the present invention provides a kind of expansion joints.

The technical solution adopted by the present invention to solve the technical problems is: a kind of expansion joint, including No.1 end pipe, No. two ends Pipe, inner sleeve and sleeve connection structure, the No.1 end pipe are set in the outside of No. two end pipes, are equipped in No. two end pipes interior One end of casing, the inner sleeve is connect with No.1 end pipe, passes through sleeve connection knot between the No.1 end pipe and No. two end pipes Structure connection.

Specifically, the No.1 end pipe includes No.1 connecting plate, No.1 outer sleeve and No.1 extension socket, an extra It is fixedly connected with No.1 connecting plate on the outside of one end of sleeve, the No.1 outer sleeve is fixedly connected far from one end of No.1 connecting plate There is No.1 extension socket.

Specifically, No. two end pipes include No. two connecting plates, two extra sleeves, No. two extension sockets and No.1 bulge loop, Be fixedly connected with No. two connecting plates on the outside of one end of the two extras sleeve, the two extras sleeve far from No. two connecting plates one End is fixedly connected with No. two extension sockets, and the other end inner wall of No. two extension sockets is fixedly connected with No.1 bulge loop, described No.1 bulge loop inner wall is equipped with several No. two annular grooves, and No. two sealing rings, No. two extensions are equipped in No. two annular grooves Sleeve outer wall is equipped with several No.1 annular grooves, is equipped with No.1 sealing ring in the No.1 annular groove.

Specifically, the inner sleeve includes casing main body, wind gathering cover and No. two bulge loops, one end outer wall of described sleeve pipe main body Be fixedly connected with No. two bulge loops, No. two bulge loops are located in two extra sleeves, described sleeve pipe main body far from No. two bulge loops one End is fixedly connected with wind gathering cover, and the wind gathering cover is located in No.1 outer sleeve, the wind gathering cover outer rim and No.1 outer sleeve inner wall Welding, No. two bulge loop outer walls are equipped with several No. three annular grooves, are equipped with No. three sealing rings in No. three annular grooves.

Specifically, the sleeve connection structure includes double threaded screw, adjusting nut, movable plate, threaded rod, release handle, limit Position slide bar and adjustable spring, the connecting hole are provided on No.1 connecting plate and No. two connecting plates, and four double threaded screws are equal Between No.1 connecting plate and No. two connecting plates, the both ends of the double threaded screw are each passed through No.1 connecting plate and No. two connections Plate is threaded with adjusting nut, and the outside of the No.1 outer sleeve and two extra sleeves is arranged with movable plate, described in two The opposite side of movable plate is fixedly connected to two threaded rods, and release handle, the adjusting are connected between the adjacent threaded rod Handle includes rotational sleeve, Anti-slip cover and thread bush, and the outer wall of the rotational sleeve is bonded with Anti-slip cover, and the two of the rotational sleeve End inner wall is arranged with thread bush, and two thread bush are threadedly coupled with two threaded rods respectively, embedding in the movable plate If there are four slide bar is limited, the outside of the limit slide bar is arranged with adjustable spring.

Specifically, the No.1 connecting plate and No. two connecting plates respectively with limit slide bar welding, the No.1 connecting plate and Sleeve connection structure is connected between No. two connecting plates.

Specifically, being equipped with inner sleeve in the No.1 extension socket, No. two extension sockets are located at inner sleeve and No.1 Between extension socket.

Specifically, the internal screw thread of two thread bush is contrary, the limit slide bar is slidably connected with movable plate.

Beneficial effects of the present invention:

(1) a kind of expansion joint of the present invention, by the setting of inner sleeve and three seals circle, in No. two extension sockets It is equipped with No.1 sealing ring between No.1 extension socket, No. two sealing rings are equipped between No.1 bulge loop and casing main body, two It is equipped with No. three sealing rings number between bulge loop and two extra sleeves, guarantees sealing performance, wind gathering cover is opposite with fluid incoming direction, from And windage is reduced, and be avoided that flow direction and sealing structure face, so that impurity be avoided to block, further, No.1 extends Sleeve, No. two extension sockets and casing main body form tortuous choke structure, even if sealing structure part is damaged, biggish windage Also it can be reduced amount of leakage.

(2) it is remote to screw opposite adjusting nut by the setting of sleeve connection structure for a kind of expansion joint of the present invention From under the action of the telescopic spring, No.1 connecting plate and No. two connecting plates are mutually separate, so that No.1 connecting plate 11 and No. two connections Plate spacing expands, and facilitates the pipeline for being adapted to different spacing, then screw two release handles, the thread bush and screw thread of threaded connection simultaneously Bar interaction, so that the spacing between threaded rod becomes larger, can expand the spacing between movable plate, to movable plate and connecting plate it Between spacing adjust to OK range, adjustable spring plays pressuring action again, pushes connecting plate supported flange sealing element, really Protect the sealing effect between expansion joint and pipeline.

Detailed description of the invention

Present invention will be further explained below with reference to the attached drawings and examples.

Fig. 1 is a kind of structure sectional view of expansion joint provided by the invention；

Fig. 2 is enlarged drawing at A in a kind of expansion joint Fig. 1 provided by the invention；

Fig. 3 is the structure chart of No.1 end pipe in a kind of expansion joint provided by the invention；

Fig. 4 is the structure sectional view of release handle in a kind of expansion joint provided by the invention；

Fig. 5 is the structure sectional view of inner sleeve in a kind of expansion joint provided by the invention.

In figure: 1, No.1 end pipe；11, No.1 connecting plate；12, No.1 outer sleeve；13, No.1 extension socket；2, No. two ends Pipe；21, No. two connecting plates；22, two extra sleeve；23, No. two extension sockets；231, No.1 annular groove；232, No.1 sealing ring； 24, No.1 bulge loop；241, No. two annular grooves；242, No. two sealing rings；3, inner sleeve；31, casing main body；32, wind gathering cover；33, No. two bulge loops；331, No. three annular grooves；332, No. three sealing rings；4, sleeve connection structure；41, double threaded screw；42, spiral shell is adjusted It is female；43, movable plate；44, threaded rod；45, release handle；451, rotational sleeve；452, Anti-slip cover；453, thread bush；46, limit is slided Bar；47, adjustable spring；48, connecting hole.

Specific embodiment

In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below Specific embodiment is closed, the present invention is further explained.

As Figure 1-Figure 5, a kind of expansion joint of the present invention, including No.1 end pipe 1, No. two end pipe 2, inner sleeve 3 With sleeve connection structure 4, the No.1 end pipe 1 is set in the outside of No. two end pipes 2, is equipped with inner sleeve in No. two end pipes 2 3, one end of the inner sleeve 3 is connect with No.1 end pipe 1, passes through sleeve connection knot between the No.1 end pipe 1 and No. two end pipes 2 Structure 4 connects, and adjusts the spacing between No.1 end pipe 1 and No. two end pipes 2 by sleeve connection structure 4, and can adjust expansion joint simultaneously Elastic force, guarantee the leakproofness of expansion joint by inner sleeve 3 and three seals circle.

Specifically, the No.1 end pipe 1 includes No.1 connecting plate 11, No.1 outer sleeve 12 and No.1 extension socket 13, institute It states and is fixedly connected with No.1 connecting plate 11 on the outside of one end of No.1 outer sleeve 12, the No.1 outer sleeve 12 is far from No.1 connecting plate 11 one end is fixedly connected with No.1 extension socket 13, forms composite structure.

Specifically, No. two end pipes 2 include No. two connecting plates 21, two extra sleeves, 22, No. two extension sockets 23 and one Number bulge loop 24 is fixedly connected with No. two connecting plates 21, the two extras sleeve 22 on the outside of one end of the two extras sleeve 22 One end far from No. two connecting plates 21 is fixedly connected with No. two extension sockets 23, the other end inner wall of No. two extension sockets 23 It is fixedly connected with No.1 bulge loop 24,24 inner wall of No.1 bulge loop is equipped with several No. two annular grooves 241, No. two annular grooves No. two sealing rings 242 are equipped in 241,23 outer wall of No. two extension sockets is equipped with several No.1 annular grooves 231, the No.1 It is equipped with No.1 sealing ring 232 in annular groove 231, is set in No. two end pipes 2 there are two sealing structure, in No. two extension sockets 23 No.1 sealing ring 232 is equipped between No.1 extension socket 13, it is close equipped with No. two between No.1 bulge loop 24 and casing main body 31 Seal 242.

Specifically, the inner sleeve 3 includes casing main body 31, wind gathering cover 32 and No. two bulge loops 33, described sleeve pipe main body 31 One end outer wall be fixedly connected with No. two bulge loops 33, No. two bulge loops 33 are located in two extra sleeves 22, described sleeve pipe main body 31 one end far from No. two bulge loops 33 are fixedly connected with wind gathering cover 32, and the wind gathering cover 32 is located in No.1 outer sleeve 12, described 32 outer rim of wind gathering cover and 12 inner wall of No.1 outer sleeve weld, and 33 outer wall of No. two bulge loops is equipped with several No. three annular grooves 331, institute It states and is equipped with No. three sealing rings 332 in No. three annular grooves 331, it is close equipped with No. three between No. two bulge loops 33 and two extra sleeves 22 Seal 332, and wind gathering cover 32 is opposite with fluid incoming direction, to reduce windage, and is avoided that flow direction and sealing structure Face, so that impurity be avoided to block.

Specifically, the sleeve connection structure 4 include double threaded screw 41, adjusting nut 42, movable plate 43, threaded rod 44, Release handle 45, limit slide bar 46 and adjustable spring 47, the connecting hole 48 are provided with No.1 connecting plate 11 and No. two connecting plates 21 On, four double threaded screws 41 are respectively positioned between No.1 connecting plate 11 and No. two connecting plates 21, and the two of the double threaded screw 41 End is each passed through No.1 connecting plate 11 and No. two connecting plates 21 are threaded with adjusting nut 42, the No.1 outer sleeve 12 and two The outside of extra sleeve 22 is arranged with movable plate 43, and the opposite side of two movable plates 43 is fixedly connected to two screw threads Bar 44, release handle 45 is connected between the adjacent threaded rod 44, and the release handle 45 includes rotational sleeve 451, Anti-slip cover 452 With thread bush 453, the outer wall of the rotational sleeve 451 is bonded with Anti-slip cover 452, and the both ends inner wall of the rotational sleeve 451 is equal It is arranged with thread bush 453, two thread bush 453 are threadedly coupled with two threaded rods 44 respectively, in the movable plate 43 It being embedded there are four slide bar 46 is limited, the outside of the limit slide bar 46 is arranged with adjustable spring 47, when adjusting expansion joint length, It is separate to screw opposite adjusting nut 42, under the action of adjustable spring 47, No.1 connecting plate 11 is mutually remote with No. two connecting plates 21 From so that No.1 connecting plate 11 and No. two 21 spacing of connecting plate expansions, facilitate the pipeline for being adapted to different spacing, then by connecting plate It is fixed with pipe flange screw, at this point, adjustable spring 47 excessively extends, can not play the role of compressing pipe flange, revolve simultaneously Twist two release handles 45, thread bush 453 and threaded rod 44 interaction of threaded connection, so that the spacing between threaded rod 44 becomes Greatly, the spacing between movable plate 43 can be expanded, adjusted after the spacing between movable plate 43 and connecting plate to OK range, stretched Spring 47 plays pressuring action again, pushes connecting plate supported flange sealing element, it is ensured that the sealing effect between expansion joint and pipeline Fruit.

Specifically, the No.1 connecting plate 11 and No. two connecting plates 21 are welded with limit slide bar 46 respectively, the No.1 connects It is connected with sleeve connection structure 4 between fishplate bar 11 and No. two connecting plates 21, so that the spacing between movable plate 43 is adjustable.

Specifically, being equipped with inner sleeve 3 in the No.1 extension socket 13, No. two extension sockets 23 are located at inner sleeve 3 Between No.1 extension socket 13,13, No. two extension sockets 23 of No.1 extension socket and casing main body 31 form tortuous choke Structure, even if sealing structure part is damaged, biggish windage also can be reduced amount of leakage.

Specifically, the internal screw thread of two thread bush 453 is contrary, the limit slide bar 46 is slided with movable plate 43 Connection so that threaded rod 44 can synchronize close to or far from.

When in use, the spacing between No.1 end pipe 1 and No. two end pipes 2 is adjusted by sleeve connection structure 4, and can adjusted simultaneously The elastic force of whole expansion joint is guaranteed the leakproofness of expansion joint, the position of three seal structures by inner sleeve 3 and three seals circle It is respectively as follows: between No. two extension sockets 23 and No.1 extension socket 13 and is equipped with No.1 sealing ring 232, in 24 He of No.1 bulge loop It is equipped with No. two sealing rings 242 between casing main body 31, No. three sealing rings are equipped between No. two bulge loops 33 and two extra sleeves 22 332, and wind gathering cover 32 is opposite with fluid incoming direction, to reduce windage, and is avoided that flow direction and sealing structure face, To avoid impurity from blocking, further, 13, No. two extension sockets 23 of No.1 extension socket and casing main body 31 form complications Choke structure, even if sealing structure part is damaged, biggish windage also can be reduced amount of leakage, when adjusting expansion joint length, screw Opposite adjusting nut 42 is separate, and under the action of adjustable spring 47, No.1 connecting plate 11 and No. two connecting plates 21 are mutually separate, So that No.1 connecting plate 11 and No. two 21 spacing of connecting plate expand, facilitate the pipeline for be adapted to different spacing, then by connecting plate and Pipe flange screw is fixed, at this point, adjustable spring 47 excessively extends, can not be played the role of compressing pipe flange, be screwed simultaneously Two release handles 45, thread bush 453 and threaded rod 44 interaction of threaded connection, so that the spacing between threaded rod 44 becomes Greatly, the spacing between movable plate 43 can be expanded, adjusted after the spacing between movable plate 43 and connecting plate to OK range, stretched Spring 47 plays pressuring action again, pushes connecting plate supported flange sealing element, it is ensured that the sealing effect between expansion joint and pipeline Fruit.

The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, and the description in above embodiment and specification only illustrates the present invention Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and Improvement is both fallen in the scope of protection of present invention.The claimed scope of the invention is by appended claims and its equivalent Object defines.

Claims

1. a kind of expansion joint, which is characterized in that including No.1 end pipe (1), No. two end pipes (2), inner sleeve (3) and sleeve connection knot Structure (4), the No.1 end pipe (1) are set in the outside of No. two end pipes (2), are equipped with inner sleeve (3) in No. two end pipes (2), One end of the inner sleeve (3) is connect with No.1 end pipe (1), passes through sleeve between the No.1 end pipe (1) and No. two end pipes (2) Connection structure (4) connection.

2. a kind of expansion joint according to claim 1, it is characterised in that: the No.1 end pipe (1) includes No.1 connecting plate (11), one end outside of No.1 outer sleeve (12) and No.1 extension socket (13), the No.1 outer sleeve (12) is fixedly connected with No.1 connecting plate (11), the No.1 outer sleeve (12) are fixedly connected with No.1 extension set far from the one end of No.1 connecting plate (11) Cylinder (13).

3. a kind of expansion joint according to claim 1, it is characterised in that: No. two end pipes (2) include No. two connecting plates (21), two extra sleeves (22), No. two extension sockets (23) and No.1 bulge loop (24), outside one end of the two extras sleeve (22) Side is fixedly connected with No. two connecting plates (21), and the two extras sleeve (22) is fixedly connected far from one end of No. two connecting plates (21) There are No. two extension sockets (23), the other end inner wall of No. two extension sockets (23) is fixedly connected with No.1 bulge loop (24), institute No.1 bulge loop (24) inner wall is stated equipped with several No. two annular grooves (241), No. two annular grooves (241) are interior to be equipped with No. two sealings It encloses (242), No. two extension sockets (23) outer wall is equipped with several No.1 annular grooves (231), and the No.1 annular groove (231) is interior It is equipped with No.1 sealing ring (232).

4. a kind of expansion joint according to claim 1, it is characterised in that: the inner sleeve (3) include casing main body (31), Wind gathering cover (32) and No. two bulge loops (33), one end outer wall of described sleeve pipe main body (31) are fixedly connected with No. two bulge loops (33), institute It states No. two bulge loops (33) to be located in two extra sleeves (22), described sleeve pipe main body (31) is fixed far from one end of No. two bulge loops (33) It is connected with wind gathering cover (32), the wind gathering cover (32) is located in No.1 outer sleeve (12), wind gathering cover (32) outer rim and No.1 The welding of outer sleeve (12) inner wall, No. two bulge loops (33) outer wall are equipped with several No. three annular grooves (331), No. three annular grooves (331) No. three sealing rings (332) are equipped in.

5. a kind of expansion joint according to claim 1, it is characterised in that: the sleeve connection structure (4) includes double end spiral shell Bar (41), adjusting nut (42), movable plate (43), threaded rod (44), release handle (45), limit slide bar (46) and adjustable spring (47), the connecting hole (48) is provided on No.1 connecting plate (11) and No. two connecting plates (21), four double threaded screws (41) it is respectively positioned between No.1 connecting plate (11) and No. two connecting plates (21), the both ends of the double threaded screw (41) are each passed through one Number connecting plate (11) and No. two connecting plates (21) are threaded with adjusting nut (42), the No.1 outer sleeve (12) and two extras The outside of sleeve (22) is arranged with movable plate (43), and the opposite side of two movable plates (43) is fixedly connected to two spiral shells Rasp bar (44) is connected with release handle (45) between the adjacent threaded rod (44), and the release handle (45) includes rotational sleeve (451), the outer wall of Anti-slip cover (452) and thread bush (453), the rotational sleeve (451) is bonded with Anti-slip cover (452), described The both ends inner wall of rotational sleeve (451) is arranged with thread bush (453), two thread bush (453) respectively with two screw threads Bar (44) is threadedly coupled, and is embedded in the movable plate (43) there are four limiting slide bar (46), limit slide bar (46) it is outer Side is arranged with adjustable spring (47).

6. a kind of expansion joint according to claim 2, it is characterised in that: the No.1 connecting plate (11) and No. two connecting plates (21) sleeve company is connected between the No.1 connecting plate (11) and No. two connecting plates (21) with limit slide bar (46) welding respectively Binding structure (4).

7. a kind of expansion joint according to claim 3, it is characterised in that: be equipped with inner sleeve in the No.1 extension socket (13) It manages (3), No. two extension sockets (23) are located between inner sleeve (3) and No.1 extension socket (13).

8. a kind of expansion joint according to claim 5, it is characterised in that: the internal screw thread side of two thread bush (453) To on the contrary, the limit slide bar (46) is slidably connected with movable plate (43).