CN216242910U

CN216242910U - Anti-pulling out expansion device

Info

Publication number: CN216242910U
Application number: CN202122437749.0U
Authority: CN
Inventors: 张宇峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-04-08
Anticipated expiration: 2031-10-11

Abstract

The utility model provides a pull-off prevention expansion piece which comprises an outer opening ring and an inner opening ring, wherein flange plates used for being connected with each other are arranged on the outer opening ring and the inner opening ring, one end of the inner opening ring extends into the outer opening ring, a special-shaped sealing assembly is arranged between the inner opening ring and the outer opening ring and comprises two special-shaped sealing pieces, the connecting surfaces of the two special-shaped sealing pieces are arranged in an inclined mode, the inclined direction is that the connecting surfaces rise from the direction close to the inner wall of the inner opening ring to the direction of a central shaft of the inner opening ring, a flange pressing plate used for pressing the special-shaped sealing assembly is arranged on the inner opening ring, and the flange pressing plate is connected with the flange plates on the outer opening ring. The utility model has the following beneficial effects: through the special-shaped seal assembly that two special-shaped seal parts are constituteed, it has solved the expansion bend among the prior art at installation construction, dismouting maintenance and operation in-process, the easy technical problem who damages of sealing member.

Description

Anti-pulling out expansion device

Technical Field

The utility model relates to the technical field of pipeline connecting pieces, in particular to a pull-out preventing expansion piece.

Background

The existing pipeline can not completely and autonomously expand and contract with cold when the temperature changes, so that great stress can be generated in the pipeline, and the superposition of the stress can cause the pipeline and equipment to be damaged, run, fall, leak and the like.

Therefore, in the process of pipeline installation and construction, an expansion piece is usually additionally arranged, wherein the metal expansion piece has the problems of poor corrosion resistance, short service life, easy damage of a sealing piece, easy pull-off and accidents and the like.

The reasons for this are:

1. the existing expansion piece is usually made of carbon steel and is easy to corrode in the process of conveying a medium; when the stress is larger than the stress which can be born by the cable, the cable is easy to pull off; in the processes of installation, construction, disassembly, assembly, maintenance and operation, the sealing element is easy to damage;

2. the stress change of the pipeline can cause the displacement compensation of the expansion piece; the temperature difference between day and night and season changes frequently, which easily causes damage to the sealing member and the connecting member, causes leakage, and even causes great economic loss.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model provides a pull-off prevention expansion piece, which solves the technical problem that a sealing element is easy to damage in the installation, construction, disassembly, assembly, maintenance and operation processes of the expansion piece in the prior art.

According to the embodiment of the utility model, the anti-pull-off expansion piece comprises an outer opening ring and an inner opening ring, wherein flange plates used for being connected with each other are arranged on the outer opening ring and the inner opening ring, one end of the inner opening ring extends into the outer opening ring, a special-shaped sealing assembly is arranged between the inner opening ring and the outer opening ring and comprises two special-shaped sealing pieces, the connecting surfaces of the two special-shaped sealing pieces are arranged in an inclined mode, the inclined direction is that the special-shaped sealing pieces rise towards the central axis direction of the inner opening ring from the direction close to the inner wall of the inner opening ring, a flange pressing plate used for pressing the special-shaped sealing assembly is arranged on the inner opening ring, and the flange pressing plate is connected with the flange plates on the outer opening ring.

Further, a concave check ring is arranged on the inner wall of the outer opening ring, the special-shaped sealing assembly is arranged on the concave check ring, and the contact surface of the concave check ring and the special-shaped sealing assembly is in an elliptic arc shape.

Furthermore, the special-shaped sealing elements are circular rings, the cross sections of the special-shaped sealing elements are closed graphs formed by arcs and a chord, the chord sides of the two special-shaped sealing elements are tightly attached to each other to form a connecting surface, and the cross sectional area of each special-shaped sealing element is 1/2-2/3 whole circle areas.

Furthermore, the special-shaped sealing element is in interference fit with the inner wall of the outer opening ring and the outer wall of the inner opening ring.

Furthermore, the end, far away from outer mouthful circle, of interior mouthful circle is provided with the ring flange, and outer mouthful circle both ends all are provided with the ring flange, outer mouthful circle is close to the ring flange pressure disk of interior mouthful circle one end, ring flange and outer mouthful circle on the circle is close to the ring flange of interior mouthful circle one end and is connected.

Furthermore, the flange plate of the outer opening ring close to one end of the inner opening ring is connected with the flange pressure plate through a short screw, the flange plate on the inner opening ring is connected with the flange plate of the outer opening ring close to one end of the inner opening ring through a long screw, and nuts are arranged at two ends of the long screw and two ends of the short screw for fixing.

Furthermore, all circumference equipartition has the connecting hole on ring flange and the flange pressure disk, just the connecting hole of ring flange and flange pressure disk corresponds, short screw rod and long screw rod wear to establish in the connecting hole in proper order in turn.

Furthermore, the flange plate on the inner opening ring and the flange plate on the outer opening ring close to one end of the inner opening ring are uniformly provided with limiting blocks extending outwards, the flange plate on the outer opening ring close to one end of the inner opening ring and the flange pressure plate are uniformly provided with connecting holes connected with the short screw rods in the circumferential direction, the connecting holes in the flange pressure plate and the limiting blocks are arranged in a staggered mode, and the limiting blocks are provided with connecting holes connected with the long screw rods.

The technical principle of the utility model is as follows: adopt the special-shaped seal assembly that two special-shaped seal parts are constituteed to be used for sealing, played and increased sealed area of contact, and if a special-shaped seal part damages, another special-shaped seal part still can normally work, the sealing capacity of expansion bend has been improved, and then make factor of safety in utilization improve, simultaneously because the slope setting is personally submitted in the connection of two special-shaped seal parts, stress can more even distribution on two special-shaped seal parts after the special-shaped seal part atress, and then improve the life of two special-shaped seal parts.

Compared with the prior art, the utility model has the following beneficial effects: through the special-shaped seal assembly that two special-shaped seal parts are constituteed, it has solved the expansion bend among the prior art at installation construction, dismouting maintenance and operation in-process, the easy technical problem who damages of sealing member.

Drawings

Fig. 1 is a schematic structural view of a pull-off prevention retractor according to embodiment 1 of the present invention.

Fig. 2 is a partially enlarged view of a portion B of fig. 1.

Fig. 3 is a cross-sectional view a-a of fig. 1.

Fig. 4 is a schematic view of the flange structure in embodiment 2 of the present invention.

Fig. 5 is a schematic view of the flange structure in embodiment 3 of the present invention.

In the above drawings: 10. an outer opening ring; 11. a concave retainer ring; 12. an elliptical arc shape; 20. an inner opening ring; 30. a flange plate; 31. a long screw; 32. a nut; 33. connecting holes; 34. a limiting block; 40. a profiled seal; 41. a connecting surface; 50. a flange platen; 51. short screw.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments.

The anti-pulling-off expansion piece shown in fig. 1-2 comprises an outer opening ring 10 and an inner opening ring 20, two ends of the outer opening ring 10 and two ends of the inner opening ring 20 are respectively connected with pipelines, a flange 30 for mutual connection is integrally formed on the specific outer opening ring 10 and the specific inner opening ring 20, one end of the inner opening ring 20 extends into the outer opening ring 10, a special-shaped sealing assembly is arranged between the inner opening ring 20 and the outer opening ring 10 and comprises two special-shaped sealing elements 40, a connecting surface 41 of the two special-shaped sealing elements 40 is obliquely arranged, the oblique direction is that the two special-shaped sealing elements rise towards the central axis direction of the inner opening ring 20 from the direction close to the inner wall of the inner opening ring 20, a flange pressing plate 50 for pressing the special-shaped sealing elements is sleeved on the inner opening ring 20, and the flange pressing plate 50 is connected with the flange 30 on the outer opening ring 10, so that the two special-shaped sealing elements 40 can be pressed.

As shown in fig. 2, a concave retainer ring 11 is arranged on the inner wall of the outer opening ring 10, the special-shaped sealing assembly is arranged on the concave retainer ring 11, the concave retainer ring 11 is matched with the flange pressure plate 50 to fix the special-shaped sealing assembly between the outer opening ring 10 and the inner opening ring 20, and the contact surface of the concave retainer ring 11 and the special-shaped sealing assembly is designed to be an elliptic arc 12, so that the concave retainer ring 11 is tightly attached to the radian of the special-shaped sealing assembly, and the special-shaped sealing assembly can better play a sealing role.

As shown in fig. 2, the contour seal 40 is circular, the cross section of the contour seal 40 is a closed figure formed by an arc and a chord, the chord sides of the two contour seals 40 are tightly attached to each other to form a connecting surface 41, the cross section area of the contour seal 40 is 1/2-2/3 whole circles, the cross section of the two contour seals 40 is 1/2-2/3 circles, which not only increases the initial contact area of the two contour seals 40, but also maintains the deformability of the original circular seal, i.e., the contour seal 40 can better seal the inner lip 20 and the outer lip 10 after being pressed.

As shown in fig. 2, the special-shaped sealing element 40 is in interference fit with the inner wall of the outer opening ring 10 and the outer wall of the inner opening ring 20, so that the special-shaped sealing element 40 can be deformed by the pressure of the inner wall of the outer opening ring 10 and the pressure of the outer wall of the inner opening ring 20, and further better sealing performance can be obtained.

As shown in FIG. 1, a flange 30 is integrally formed at one end of the inner opening ring 20 far from the outer opening ring 10, flanges 30 are integrally formed at two ends of the outer opening ring 10, the flange 30 at one end of the outer opening ring 10 close to the inner opening ring 20 is in screw connection with a flange pressure plate 50, and the flange 30 on the inner opening ring 20 is in screw connection with the flange 30 at one end of the outer opening ring 10 close to the inner opening ring 20.

As shown in FIG. 1, the flange 30 of the outer mouth ring 10 near the end of the inner mouth ring 20 is connected with the flange pressure plate 50 by a short screw 51, the flange 30 of the inner mouth ring 20 is connected with the flange 30 of the outer mouth ring 10 near the end of the inner mouth ring 20 by a long screw 31, and the long screw 31 and the short screw 51 are both fixed by nuts 32.

As shown in fig. 1 and 3, the flange 30 and the flange pressure plate 50 are circumferentially and uniformly provided with connecting holes 33, the flange 30 corresponds to the connecting holes 33 of the flange pressure plate 50, and the short screws 51 and the long screws 31 are sequentially and alternately inserted into the connecting holes 33.

Example 2

As shown in fig. 4, the difference from embodiment 1 is that the flange 30 on the inner opening ring 20 and the flange 30 at one end of the outer opening ring 10 close to the inner opening ring 20 are integrally formed with evenly distributed and outwardly extending stoppers 34, the flange 30 at one end of the outer opening ring 10 close to the inner opening ring 20 and the flange pressure plate 50 are circumferentially and evenly distributed with connecting holes 33 connected with short screws 51, the connecting holes 33 on the flange pressure plate 50 and the stoppers 34 are arranged in a staggered manner, and the stoppers 34 are provided with connecting holes 33 connected with long screws 31.

Example 3

As shown in fig. 5, the same difference as in example 2 is that: the stop 34 is bolted to the flange 30.

Meanwhile, in the above embodiments 1 to 3, the number of the connection holes 33 on the flange plate 30 and the flange pressure plate 50 can be adjusted according to specific requirements, and when the internal bearing pressure of the anti-pull-off expansion device is higher, the number of the connection holes 33 can be increased. The number of the long screws 31 can be adjusted according to the number of the connecting holes 33 in the specific arrangement process, the number of the long screws 31 and the number of the short screws 51 are not less than 2, and the long screws 31 are symmetrically distributed on the center of the flange plate 30.

The pull-off prevention design of the embodiments 1-3 is to limit the relative displacement of the outer ring 10 and the inner ring 20 by arranging the corresponding nut 32 on the long screw 31.

Meanwhile, the inner walls of the inner opening ring 20 and the outer opening ring 10 are coated with films, and different coating modes are selected according to different use environments, such as tap water, polyethylene, polypropylene and the like; the liquid with corrosiveness or toxicity and harm is treated by a polytetrafluoroethylene or nano composite material coating.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. The utility model provides an anti-pulling-off expansion bend, includes that outer mouthful of circle encloses with interior mouthful, outer mouthful of circle encloses with interior mouthful and is equipped with the ring flange that is used for interconnect, its characterized in that: the utility model discloses a special-shaped seal assembly, including interior mouthful circle, outer mouthful circle, and the slope direction is for following the inside mouth circle central axis direction and rise to the slope setting, the slope direction is equipped with the flange pressure disk that is used for compressing tightly special-shaped seal assembly on the interior mouthful circle, flange pressure disk and the outer ring flange that circles are connected.

2. A pull-off prevention retractor as claimed in claim 1, wherein: the inner wall of the outer opening ring is provided with a concave check ring, the special-shaped sealing assembly is arranged on the concave check ring, and the contact surface of the concave check ring and the special-shaped sealing assembly is in an elliptic arc shape.

3. A pull-off prevention retractor as claimed in claim 1, wherein: the special-shaped sealing elements are circular rings, the cross sections of the special-shaped sealing elements are closed graphs formed by arcs and a chord, the chord sides of the two special-shaped sealing elements are tightly attached to each other to form a connecting surface, and the cross sectional area of each special-shaped sealing element is 1/2-2/3 whole circle areas.

4. A pull-off prevention retractor as claimed in claim 3, wherein: the special-shaped sealing element is in interference fit with the inner wall of the outer opening ring and the outer wall of the inner opening ring.

5. A pull-off prevention retractor according to any one of claims 1-4 wherein: the inner opening ring is provided with a flange plate at one end far away from the outer opening ring, the two ends of the outer opening ring are provided with flange plates, the outer opening ring is close to a flange plate connecting flange pressure plate at one end of the inner opening ring, and the flange plate on the inner opening ring is connected with the flange plate at one end of the outer opening ring close to the inner opening ring.

6. An anti-pull-off retractor according to claim 5 wherein: the flange plate of the outer opening ring near one end of the inner opening ring is connected with the flange pressure plate through a short screw, the flange plate on the inner opening ring and the flange plate of the outer opening ring near one end of the inner opening ring are connected through a long screw, and nuts are arranged at two ends of the long screw and two ends of the short screw for fixation.

7. A pull-off prevention retractor as claimed in claim 6, wherein: the flange plate and the flange pressure plate are circumferentially and uniformly provided with connecting holes, the flange plate corresponds to the connecting holes of the flange pressure plate, and the short screw rods and the long screw rods are sequentially and alternately arranged in the connecting holes in a penetrating mode.

8. A pull-off prevention retractor as claimed in claim 6, wherein: the flange dish that interior mouth circled and the flange dish that outer mouth circle is close to interior mouth circle one end on the equipartition stopper that has outside extension, all circumference equipartition have the connecting hole of being connected with the short screw rod on the flange dish that outer mouth circle is close to interior mouth circle one end and the flange pressure disk, connecting hole and the stopper dislocation set on the flange pressure disk, be equipped with the connecting hole of being connected with the long screw rod on the stopper.