CN110440082B

CN110440082B - Expansion joint

Info

Publication number: CN110440082B
Application number: CN201910748975.5A
Authority: CN
Inventors: 不公告发明人
Original assignee: Jiangsu Ruixin Heat Exchange Equipment Co ltd
Current assignee: Taizhou Tongli Machinery Co ltd
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2021-05-18
Anticipated expiration: 2039-08-14
Also published as: CN110440082A

Abstract

The invention relates to the technical field of pipeline fittings, in particular to an expansion joint which comprises a first end pipe, a second end pipe, an inner sleeve and a sleeve connecting structure, wherein the first end pipe is sleeved outside the second end pipe, the inner sleeve is arranged in the second end pipe, one end of the inner sleeve is connected with the first end pipe, the first end pipe is connected with the second end pipe through the sleeve connecting structure, the first end pipe comprises a first connecting plate, a first outer sleeve and a first extension sleeve, the outer side of one end of the first outer sleeve is fixedly connected with the first connecting plate, the expansion joint is characterized in that a first sealing ring is arranged between the second extension sleeve and the first extension sleeve through the arrangement of the inner sleeve and a third sealing ring, a second sealing ring is arranged between the first convex ring and a sleeve main body, a third sealing ring is arranged between the second convex ring and the second outer sleeve, and a wind gathering cover is opposite to a fluid introducing direction, thereby reducing wind resistance.

Description

Expansion joint

Technical Field

The invention relates to the technical field of pipe fittings, in particular to an expansion joint.

Background

The expansion joint is a flexible element which can effectively compensate axial deformation, for example, the expansion joint welded on the shell of the fixed tube-plate heat exchanger has large axial flexibility and is easy to deform, can compensate the thermal expansion difference generated by the tubes and the shell due to different wall temperatures, and reduces the axial load of the tubes and the shell, thereby reducing the temperature difference stress of the tubes, the tube plates and the shell, and avoiding causing strength damage, instability damage and tube pull-out damage.

The sleeve expansion joint is composed of an inner sleeve and an outer sleeve which can do axial relative movement, and the inner sleeve and the outer sleeve are sealed by a packing box. When in use, the two ends of the pipe move on the same axis, the product mainly comprises a sleeve (core pipe), a shell, a sealing material and the like, is used for compensating the axial extension and retraction of the pipeline and the axial rotation of any angle, has the characteristics of small volume and large compensation amount, is suitable for hot water, steam and grease media, and achieves the compensation of thermal expansion through the sliding movement of the sliding sleeve to the outer sleeve.

The casing expansion joint generally comprises two sections of casings, the two sections of casings can slide, the sealing performance of the casing expansion joint is completely determined by sealing materials, the existing casing expansion joint is only sealed by a single sealing structure, particle impurities are easily carried in hot water, steam and grease media, the impurities are accumulated on the inner surface of the casing to form lumps, when the expansion joint is telescopic, the lumps easily cause excessive deformation of the sealing materials, and accordingly the hot water, the steam and the grease media are leaked, therefore, the single sealing structure is difficult to ensure the sealing performance of the casing expansion joint, in addition, the length of the existing casing expansion joint is basically fixed, when the expansion joint is connected, the expansion joint cannot be adjusted according to the actual length, and inconvenience is brought to installation work.

Disclosure of Invention

The invention provides an expansion joint aiming at the problems in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an expansion joint, includes an end pipe, No. two end pipes, interior sleeve pipe and muffjoint structure, the outside at No. two end pipes is established to an end pipe box, No. two intraductal interior sleeve pipes that are equipped with of end, interior sheathed tube one end and an end union coupling, connect through muffjoint structure between an end pipe and No. two end pipes.

Specifically, an end pipe includes a connecting plate, an outer sleeve and an extension sleeve, a connecting plate of outer telescopic one end outside fixedly connected with, an outer sleeve keeps away from the one end fixedly connected with extension sleeve of a connecting plate.

The utility model discloses a sealing washer, including No. two connecting plates, No. two outer sleeves, No. two extension sleeves and bulge loop, No. two outer telescopic one end outside fixedly connected with connecting plates No. two, No. two outer sleeves keep away from No. two extension sleeves of one end fixedly connected with of No. two connecting plates, No. two extension sleeve's other end inner wall fixedly connected with bulge loop, a bulge loop inner wall is equipped with No. two ring channels, all be equipped with the sealing washer No. two in No. two ring channels, No. two extension sleeve outer walls are equipped with a plurality of ring channels, all be equipped with the sealing washer No. one in the ring channel.

The inner sleeve comprises a sleeve main body, a wind gathering cover and a second convex ring, the second convex ring is fixedly connected to one end of the outer wall of the sleeve main body, the second convex ring is located in the second outer sleeve, the one end of the sleeve main body, far away from the second convex ring, is fixedly connected with the wind gathering cover, the wind gathering cover is located in the first outer sleeve, the outer edge of the wind gathering cover is welded to the inner wall of the first outer sleeve, the outer wall of the second convex ring is provided with a plurality of third annular grooves, and the third annular grooves are internally provided with third sealing rings.

Specifically, the sleeve connecting structure comprises double-headed screws, adjusting nuts, movable plates, threaded rods, adjusting handles, limiting slide rods and telescopic springs, the connecting holes are formed in a first connecting plate and a second connecting plate, four double-headed screws are located between the first connecting plate and the second connecting plate, two ends of each double-headed screw respectively penetrate through the first connecting plate and the second connecting plate to be connected with the adjusting nuts in a threaded manner, the movable plates are sleeved outside the first outer sleeve and the second outer sleeve, two threaded rods are fixedly connected to opposite sides of the two movable plates, the adjusting handles are connected between the adjacent threaded rods and comprise rotating sleeves, anti-skidding sleeves and threaded sleeves, the anti-skidding sleeves are bonded to the outer walls of the rotating sleeves, threaded sleeves are sleeved on inner walls of two ends of the rotating sleeves, and the two threaded sleeves are respectively in threaded connection with the two threaded rods, four limiting slide bars are embedded in the movable plate, and telescopic springs are sleeved on the outer sides of the limiting slide bars.

Specifically, a connecting plate and No. two connecting plates are respectively welded with the limiting slide rod, and a sleeve connecting structure is connected between the connecting plate and the No. two connecting plates.

Specifically, an inner sleeve is arranged in the first extension sleeve, and the second extension sleeve is positioned between the inner sleeve and the first extension sleeve.

Specifically, the internal thread directions of the two thread sleeves are opposite, and the limiting sliding rod is connected with the movable plate in a sliding mode.

The invention has the beneficial effects that:

(1) according to the expansion joint, the first sealing ring is arranged between the second extension sleeve and the first extension sleeve through the arrangement of the inner sleeve and the third sealing ring, the second sealing ring is arranged between the first convex ring and the sleeve main body, the third sealing ring is arranged between the second convex ring and the second outer sleeve, the sealing performance is guaranteed, the wind collecting cover is opposite to the fluid introducing direction, so that wind resistance is reduced, the fluid direction can be prevented from being opposite to the sealing structure, so that impurity blockage is avoided, furthermore, the first extension sleeve, the second extension sleeve and the sleeve main body form a zigzag wind blocking structure, and even if the sealing structure is partially damaged, large wind resistance can also reduce leakage.

(2) According to the expansion joint, the sleeve connecting structure is arranged, the adjusting nuts which are opposite to each other are screwed to be far away, the first connecting plate and the second connecting plate are far away from each other under the action of the telescopic spring, so that the distance between the first connecting plate 11 and the second connecting plate is enlarged, the pipeline with different distances is conveniently adapted, the two adjusting handles are screwed simultaneously, the threaded sleeves and the threaded rods which are in threaded connection interact with each other, the distance between the threaded rods is enlarged, the distance between the movable plates can be enlarged, after the distance between the movable plates and the connecting plates is adjusted to be within a proper range, the telescopic spring plays a role in compressing again, the connecting plates are pushed to compress the flange sealing piece, and the sealing effect between the expansion joint and the pipeline is ensured.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a cross-sectional view of an expansion joint according to the present invention;

FIG. 2 is an enlarged view of an expansion joint of the present invention at A in FIG. 1;

FIG. 3 is a block diagram of a first end tube of an expansion joint according to the present invention;

FIG. 4 is a cross-sectional view of an adjustment knob of an expansion joint according to the present invention;

fig. 5 is a structural sectional view of an inner sleeve of an expansion joint provided by the invention.

In the figure: 1. a first end pipe; 11. a first connecting plate; 12. a first outer sleeve; 13. a first extension sleeve; 2. a second end pipe; 21. a second connecting plate; 22. a second outer sleeve; 23. a second extension sleeve; 231. a first annular groove; 232. a first sealing ring; 24. a first convex ring; 241. a second annular groove; 242. a second sealing ring; 3. an inner sleeve; 31. a cannula body; 32. a wind gathering cover; 33. a second convex ring; 331. a third annular groove; 332. a third sealing ring; 4. a sleeve connecting structure; 41. a double-ended screw; 42. adjusting the nut; 43. a movable plate; 44. a threaded rod; 45. an adjusting handle; 451. rotating the sleeve; 452. an anti-slip sleeve; 453. a threaded sleeve; 46. a limiting slide bar; 47. a tension spring; 48. and connecting the holes.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 5, the expansion joint of the present invention includes a first end pipe 1, a second end pipe 2, an inner sleeve 3 and a sleeve connection structure 4, wherein the first end pipe 1 is sleeved outside the second end pipe 2, the inner sleeve 3 is disposed inside the second end pipe 2, one end of the inner sleeve 3 is connected to the first end pipe 1, the first end pipe 1 and the second end pipe 2 are connected by the sleeve connection structure 4, the sleeve connection structure 4 adjusts a distance between the first end pipe 1 and the second end pipe 2, and can adjust an elastic force of the expansion joint, and the inner sleeve 3 and three sealing rings ensure a sealing property of the expansion joint.

Specifically, an end pipe 1 includes connecting plate 11, an outer sleeve 12 and an extension sleeve 13, a connecting plate 11 of one end outside fixedly connected with of outer sleeve 12, an outer sleeve 12 keeps away from an one end fixedly connected with of connecting plate 11 and extends sleeve 13 No. one, forms integrated configuration.

Specifically, the second end pipe 2 comprises a second connecting plate 21, a second outer sleeve 22, a second extending sleeve 23 and a first convex ring 24, a second connecting plate 21 is fixedly connected to the outer side of one end of the second outer sleeve 22, a second extending sleeve 23 is fixedly connected to one end of the second outer sleeve 22 far away from the second connecting plate 21, a first convex ring 24 is fixedly connected with the inner wall of the other end of the second extension sleeve 23, a plurality of second annular grooves 241 are arranged on the inner wall of the first convex ring 24, a second sealing ring 242 is arranged in each second annular groove 241, a plurality of first annular grooves 231 are arranged on the outer wall of the second extension sleeve 23, a first sealing ring 232 is arranged in each first annular groove 231, two sealing structures are arranged in each second end pipe 2, a first sealing ring 232 is arranged between the second extension sleeve 23 and the first extension sleeve 13, and a second sealing ring 242 is arranged between the first convex ring 24 and the sleeve main body 31.

Specifically, interior sleeve pipe 3 includes sleeve pipe main part 31, wind-collecting cover 32 and No. two bulge loops 33, sleeve pipe main part 31's one end outer wall fixedly connected with No. two bulge loops 33, No. two bulge loops 33 are located No. two outer sleeves 22, sleeve pipe main part 31 keeps away from No. two bulge loops 33's one end fixedly connected with wind-collecting cover 32, wind-collecting cover 32 is located No. one outer sleeve 12, wind-collecting cover 32 outer fringe and No. one outer sleeve 12 inner wall welding, No. two bulge loops 33 outer walls are equipped with a plurality of No. three ring channels 331, all be equipped with No. three sealing washer 332 in No. three ring channels 331, be equipped with No. three sealing washer 332 between No. two bulge loops 33 and No. two outer sleeves 22, and wind-collecting cover 32 is relative with fluid introduction direction to reduce the windage, and can avoid fluid direction and seal structure just to avoid impurity jam.

Specifically, the sleeve connecting structure 4 includes a double-threaded screw 41, an adjusting nut 42, a movable plate 43, threaded rods 44, an adjusting handle 45, a limiting slide rod 46 and a telescopic spring 47, the connecting holes 48 are formed in the first connecting plate 11 and the second connecting plate 21, four double-threaded screws 41 are located between the first connecting plate 11 and the second connecting plate 21, two ends of each double-threaded screw 41 respectively penetrate through the first connecting plate 11 and the second connecting plate 21 to be connected with the adjusting nut 42 in a threaded manner, the movable plate 43 is sleeved outside each of the first outer sleeve 12 and the second outer sleeve 22, two threaded rods 44 are fixedly connected to opposite sides of each of the two movable plates 43, the adjusting handle 45 is connected between adjacent threaded rods 44, the adjusting handle 45 includes a rotating sleeve 451, an anti-skid sleeve 452 and a threaded sleeve 453, the outer wall of the rotating sleeve 451 is bonded with the anti-skid sleeve 452, the inner walls of the two ends of the rotating sleeve 451 are sleeved with threaded sleeves 453, the two threaded sleeves 453 are respectively in threaded connection with the two threaded rods 44, the movable plate 43 is embedded with four limiting slide rods 46, the outer sides of the limiting slide rods 46 are sleeved with telescopic springs 47, when the length of the expansion joint is adjusted, the adjusting nuts 42 which are opposite to each other are screwed away, under the action of the telescopic springs 47, the first connecting plate 11 and the second connecting plate 21 are far away, so that the distance between the first connecting plate 11 and the second connecting plate 21 is enlarged, the pipelines with different distances can be conveniently adapted, then the connecting plates and the pipeline flanges are fixed through screws, at the moment, the telescopic springs 47 excessively extend, the pipeline flanges cannot be pressed, the two adjusting handles 45 are screwed, the threaded sleeves 453 and the threaded rods 44 in threaded connection interact, so that the distance between the threaded rods 44 is enlarged, and the distance between the movable plates 43 can, after the distance between the movable plate 43 and the connecting plate is adjusted to a proper range, the expansion spring 47 plays a role in compressing again, the connecting plate is pushed to compress the flange sealing element, and the sealing effect between the expansion joint and the pipeline is ensured.

Specifically, the first connecting plate 11 and the second connecting plate 21 are respectively welded with the limiting slide rod 46, and the sleeve connecting structure 4 is connected between the first connecting plate 11 and the second connecting plate 21, so that the distance between the movable plates 43 is adjustable.

Specifically, be equipped with interior sleeve pipe 3 in extension sleeve 13, No. two extension sleeve 23 are located interior sleeve pipe 3 and extension sleeve 13, No. two extension sleeve 23 and sleeve pipe main part 31 form tortuous choke structure, even seal structure part destroys, great windage also can reduce the volume of revealing.

Specifically, the internal threads of the two threaded sleeves 453 are opposite in direction, and the limiting slide rod 46 is slidably connected with the movable plate 43, so that the threaded rod 44 can synchronously approach or depart from each other.

When using, by the interval between a muffjoint structure 4 adjustment end pipe 1 and No. two end pipes 2, and can adjust the elasticity size of expansion joint simultaneously, guarantee the leakproofness of expansion joint by interior sleeve pipe 3 and three sealing washers, three seal structure's position is respectively: a first sealing ring 232 is arranged between the first extension sleeve 23 and the first extension sleeve 13, a second sealing ring 242 is arranged between the first convex ring 24 and the sleeve main body 31, a third sealing ring 332 is arranged between the second convex ring 33 and the second outer sleeve 22, and the wind-gathering cover 32 is opposite to the fluid introduction direction, so that the wind resistance is reduced, and the fluid direction is prevented from being opposite to the sealing structure, so that the impurity blockage is avoided, furthermore, the first extension sleeve 13, the second extension sleeve 23 and the sleeve main body 31 form a zigzag wind-blocking structure, even if the sealing structure is partially damaged, the large wind resistance can also reduce the leakage amount, when the length of the expansion joint is adjusted, the opposite adjusting nuts 42 are screwed to be far away, under the action of the expansion spring 47, the first connecting plate 11 and the second connecting plate 21 are far away, so that the distance between the first connecting plate 11 and the second connecting plate 21 is enlarged, and the adaptation to pipelines with different distances is convenient, subsequently with connecting plate and pipeline flange screw fixation, at this moment, expanding spring 47 excessively extends, can't play the effect of compressing tightly the pipeline flange, revolve simultaneously and twist two regulation handles 45, threaded connection's thread bush 453 and threaded rod 44 interact for interval grow between the threaded rod 44 can enlarge the interval between fly leaf 43, treat after the interval adjustment between fly leaf 43 and the connecting plate reaches suitable scope, expanding spring 47 plays the effect of compressing tightly again, promote the connecting plate and compress tightly the flange sealing member, ensure the sealed effect between expansion joint and the pipeline.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An expansion joint is characterized by comprising a first end pipe (1), a second end pipe (2), an inner sleeve (3) and a sleeve connecting structure (4), wherein the first end pipe (1) is sleeved outside the second end pipe (2), the inner sleeve (3) is arranged in the second end pipe (2), one end of the inner sleeve (3) is connected with the first end pipe (1), and the first end pipe (1) is connected with the second end pipe (2) through the sleeve connecting structure (4);

sleeve connection structure (4) are seted up on connecting plate (11) and No. two connecting plates (21) including double-end screw (41), adjusting nut (42), movable plate (43), threaded rod (44), regulation handle (45), spacing slide bar (46) and expanding spring (47), connecting hole (48), four double-end screw (41) all are located between connecting plate (11) and No. two connecting plates (21), the both ends of double-end screw (41) are passed connecting plate (11) and No. two connecting plates (21) threaded connection respectively and are had adjusting nut (42), and the outside of outer sleeve (12) and No. two outer sleeve (22) all is overlapped and is equipped with movable plate (43), two equal fixedly connected with two threaded rods (44) in opposite side of movable plate (43), and is adjacent be connected with regulation handle (45) between threaded rod (44), regulation handle (45) are including rotating sleeve (451), Antiskid cover (452) and thread bush (453), the outer wall that rotates sleeve (451) bonds and has antiskid cover (452), the both ends inner wall that rotates sleeve (451) all is equipped with thread bush (453), two thread bush (453) respectively with two threaded rod (44) threaded connection, all inlay in fly leaf (43) and be equipped with four spacing slide bar (46), the outside of spacing slide bar (46) all is equipped with expanding spring (47) in the cover.

2. An expansion joint according to claim 1, wherein: an end pipe (1) includes connecting plate (11), an outer sleeve (12) and an extension sleeve (13), a connecting plate (11) of the one end outside fixedly connected with of outer sleeve (12), an outer sleeve (12) keep away from one end fixedly connected with of a connecting plate (11) and extend sleeve (13) No. one.

3. An expansion joint according to claim 2, wherein: no. two end pipe (2) include No. two connecting plates (21), No. two outer sleeves (22), No. two extend sleeve (23) and bulge loop (24), No. two connecting plates (21) of the one end outside fixedly connected with of No. two outer sleeves (22), No. two outer sleeves (22) keep away from No. two one end fixedly connected with of No. two connecting plates (21) and extend sleeve (23), No. two bulge loop (24) of the other end inner wall fixedly connected with of extending sleeve (23), No. one bulge loop (24) inner wall is equipped with a plurality of No. two ring channels (241), all be equipped with No. two sealing washer (242) in No. two ring channels (242), No. two extend sleeve (23) outer wall and be equipped with a plurality of ring channel (231), all be equipped with a sealing washer (232) in ring channel (231).

4. An expansion joint according to claim 1, wherein: the inner sleeve (3) comprises a sleeve body

(31) The utility model provides a fan housing (32) and No. two bulge loops (33), No. two bulge loops (33) of one end outer wall fixedly connected with of sleeve pipe main part (31), No. two bulge loops (33) are located No. two outer sleeves (22), the one end fixedly connected with fan housing (32) of No. two bulge loops (33) are kept away from in sleeve pipe main part (31), fan housing (32) are located No. one outer sleeve (12), fan housing (32) outer fringe and the inner wall welding of an outer sleeve (12), No. two bulge loops (33) outer wall is equipped with a plurality of No. three ring channels (331), all be equipped with No. three sealing washer (332) in No. three ring channels (331).

5. An expansion joint according to claim 2, wherein: the first connecting plate (11) and the second connecting plate (21) are respectively welded with the limiting slide rod (46), and a sleeve connecting structure (4) is connected between the first connecting plate (11) and the second connecting plate (21).

6. An expansion joint according to claim 3, wherein: an inner sleeve (3) is arranged in the first extension sleeve (13), and the second extension sleeve (23) is positioned between the inner sleeve (3) and the first extension sleeve (13).

7. An expansion joint according to claim 1, wherein: the internal thread directions of the two thread sleeves (453) are opposite, and the limiting sliding rod (46) is connected with the movable plate (43) in a sliding mode.