CN219120037U

CN219120037U - Flange suitable for connecting bent pipelines

Info

Publication number: CN219120037U
Application number: CN202223567687.6U
Authority: CN
Inventors: 周志宏; 潘小军
Original assignee: Changzhou Wujin No2 Flange Forge Co ltd
Current assignee: Changzhou Wujin No2 Flange Forge Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-02
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a flange suitable for connecting a bent pipe, relates to the technical field of pipe connecting flanges, and aims to solve the problems that an existing flange does not have a compensation function in the using process, has high precision requirements during processing, and is difficult to finish butt joint when the butt joint angle of a bent pipe is irregular. The connecting flanges are arranged at two ends of the flexible connecting section; the butt joint flange is arranged on the outer side of the connecting flange, a butt joint boss is arranged at the front end of the butt joint flange, and a butt joint elbow is arranged at the rear end of the butt joint flange; the installation through holes are formed in the periphery of the connecting flange plate and the periphery of the butt joint flange plate, the installation through holes of the connecting flange plate and the butt joint flange plate are connected through bolts, and nuts are installed at the joints of the end parts of the bolts and the connecting flange plate.

Description

Flange suitable for connecting bent pipelines

Technical Field

The utility model relates to the technical field of pipeline connecting flanges, in particular to a flange suitable for connecting a bent pipeline.

Background

The flange is also called flange collar or flange. The flange is a part for connecting pipes and is used for connecting the pipe ends; there are also flanges for use on the equipment access ports for connection between two equipment, such as speed reducer flanges. The flange connection or the flange joint refers to detachable connection which is formed by connecting a flange, a gasket and a bolt with each other to form a group of combined sealing structures. The pipeline flange refers to a flange for a piping in a pipeline device, and is used on equipment and refers to an inlet flange and an outlet flange of the equipment, and the contact area between a bent pipeline and a flange ring is small, so that the firmness between the bent pipeline and the flange ring is poor, and two groups of bent pipelines are connected by virtue of a special flange;

the flange suitable for connecting a bent pipeline comprises a bent pipeline and a sealing mechanism, wherein the bottom end surface of the sealing mechanism is connected with a connecting mechanism, the top end surface inside the connecting mechanism is connected with a fixing ring, the inner ring of the sealing mechanism is connected with a sealing ring, and the bent pipeline is connected to the bottom end surface of the sealing mechanism.

The flange does not have a compensation function in the use process, has high precision requirement in processing, and is difficult to finish butt joint when the butt joint angle of the bent pipe is irregular; we have therefore proposed a flange suitable for use in connection with curved pipes in order to solve the problems set out above.

Disclosure of Invention

The utility model aims to provide a flange suitable for connecting a bent pipeline, which solves the problems that the existing flange provided in the background art does not have a compensation function in the use process, has high precision requirements during processing, and is difficult to finish butt joint when the butt joint angle of a bent pipe is irregular.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the flange suitable for connecting the bent pipelines comprises a flexible connecting section, wherein a medium circulation cavity is arranged in the flexible connecting section;

further comprises:

the connecting flanges are arranged at two ends of the flexible connecting section;

the butt joint flange is arranged on the outer side of the connecting flange, a butt joint boss is arranged at the front end of the butt joint flange, and a butt joint elbow is arranged at the rear end of the butt joint flange;

the installation through holes are formed in the periphery of the connecting flange plate and the periphery of the butt joint flange plate, the installation through holes of the connecting flange plate and the butt joint flange plate are connected through bolts, and nuts are installed at the joints of the end parts of the bolts and the connecting flange plate.

Preferably, the flexible connecting section comprises a polyurethane inner core tube, a fiber woven layer, a polyurethane layer and a polyethylene resin sheath, wherein the fiber woven layer is arranged between the polyurethane inner core tube and the polyurethane layer, the polyethylene resin sheath is arranged on the outer wall of the polyurethane layer, the polyurethane inner core tube and the polyurethane layer have good heat preservation performance, the conveying requirements of different temperature media can be met, the weather resistance and the corrosion resistance are good, the service life is guaranteed, the fiber woven layer arranged between the polyurethane inner core tube and the polyurethane layer is of a net structure, and the tensile property of the polyurethane inner core tube and the polyurethane layer can be improved.

Preferably, the polyethylene resin sheath is fixedly connected with the polyurethane layer through the adhesive layer, and the polyethylene resin sheath has certain impact resistance and can play a good protection effect on the inner layer.

Preferably, the inner walls of the butt joint boss and the connecting flange plate are respectively provided with a sealing ring clamping groove, the inside of each sealing ring clamping groove is provided with a sealing ring, and the sealing performance of the joint of the butt joint boss and the connecting flange plate can be improved by the sealing rings.

Preferably, the outer wall of the flexible connecting section is provided with a spiral net belt, and the spiral net belt can improve the external strength of the flexible connecting section while not affecting the bending of the flexible connecting section.

Preferably, the elastic gaskets are arranged at the joints of the bolt heads and the nuts and the connecting flange plate and the butt flange plate, and the elastic gaskets can make the connection of the bolts and the nuts and the connecting flange plate and the butt flange plate tighter by means of the elastic action of the elastic gaskets.

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

1. according to the utility model, the flexible connecting section is arranged between the two connecting flanges, when the flexible connecting section is connected with the butt-joint bent pipes, the flexible connecting section can be bent appropriately according to the connecting angle between the two groups of butt-joint bent pipes, so that the connecting flanges at the two ends of the flexible connecting section are aligned with the butt-joint flanges at the end parts of the butt-joint bent pipes, the connecting requirements of the bent pipes with different included angles are met, the flexible compensating effect is better, the problems that the existing flange does not have a compensating function in the using process, the precision requirement on the processing is higher, and the butt-joint is difficult to finish when the butt-joint angle of the bent pipes is irregular are solved.

2. The flexible connecting section comprises the polyurethane inner core tube, the fiber woven layer and the polyurethane layer, wherein the fiber woven layer is wrapped and clamped between the polyurethane inner core tube and the polyurethane layer, the polyurethane inner core tube and the polyurethane layer have good heat insulation performance, can meet the conveying requirements of different temperature media, are good in weather resistance and corrosion resistance, ensure the service life, and the fiber woven layer arranged between the polyurethane inner core tube and the polyurethane layer is of a net structure, so that the tensile properties of the polyurethane inner core tube and the polyurethane layer can be improved, a good reinforcing effect can be achieved, and the stability of the medium in conveying can be improved.

3. Through set up the polyethylene resin sheath on the outer wall on polyurethane layer, have certain impact resistance, can play better guard action to the inlayer, and self has better acid and alkali resistance, is difficult for receiving external environment corrosion damage

4. Through being provided with spiral guipure on the outer wall of flexible connection section, the spiral guipure is when not influencing flexible connection section and buckling, can improve flexible connection section's external strength, further plays the effect of reinforcement.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a flange and elbow connection structure according to the present utility model;

FIG. 3 is a schematic view of a flange butt joint structure according to the present utility model;

FIG. 4 is an enlarged view of a portion of the utility model at A;

FIG. 5 is an enlarged view of a portion of the utility model at B;

in the figure: 1. a flexible connection section; 101. polyurethane inner core tube; 102. a fibrous braid; 103. a polyurethane layer; 104. a polyethylene resin sheath; 105. an adhesive layer; 2. a spiral mesh belt; 3. a medium flow chamber; 4. a connecting flange plate; 5. a butt flange; 6. a bolt; 7. a nut; 8. butt joint elbow; 9. a butt joint boss; 10. a sealing ring clamping groove; 11. a seal ring; 12. mounting through holes; 13. an elastic gasket.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-5, an embodiment of the present utility model is provided: the flange suitable for connecting the bent pipelines comprises a flexible connecting section 1, wherein a medium circulation cavity 3 is arranged in the flexible connecting section 1;

further comprises:

connection flanges 4 mounted at both ends of the flexible connection section 1;

the butt flange 5 is arranged on the outer side of the connecting flange 4, a butt boss 9 is arranged at the front end of the butt flange 5, and a butt elbow 8 is arranged at the rear end of the butt flange 5;

and the installation through holes 12 are formed around the connecting flange plate 4 and the butt flange plate 5, the installation through holes 12 of the connecting flange plate 4 and the butt flange plate 5 are connected through bolts 6, and nuts 7 are installed at the joints of the end parts of the bolts 6 and the connecting flange plate 4.

Referring to fig. 5, the flexible connection section 1 includes a polyurethane inner core tube 101, a fiber woven layer 102, a polyurethane layer 103 and a polyethylene resin sheath 104, the fiber woven layer 102 is disposed between the polyurethane inner core tube 101 and the polyurethane layer 103, the polyethylene resin sheath 104 is disposed on the outer wall of the polyurethane layer 103, the polyurethane inner core tube 101 and the polyurethane layer 103 have good heat insulation performance, can meet the conveying requirements of different temperature media, and have good weather resistance and corrosion resistance, the service life is ensured, the fiber woven layer 102 disposed between the polyurethane inner core tube 101 and the polyurethane layer 103 has a net structure, the tensile properties of the polyurethane inner core tube 101 and the polyurethane layer 103 can be improved, and good reinforcing effect is achieved.

Referring to fig. 5, the polyethylene resin sheath 104 is fixedly connected with the polyurethane layer 103 through the adhesive layer 105, and the polyethylene resin sheath 104 has a certain impact resistance, can have a better protection effect on the inner layer, has better acid and alkali resistance, and is not easy to be corroded and damaged by the external environment.

Referring to fig. 1 and 3, seal ring clamping grooves 10 are formed in inner walls of the butt joint bosses 9 and the connecting flange 4, seal rings 11 are mounted in the seal ring clamping grooves 10, and when the butt joint flange 5 and the connecting flange 4 are fixed, sealing performance of the joint can be improved through the structure of the seal rings 11.

Referring to fig. 1, a spiral mesh belt 2 is disposed on an outer wall of a flexible connection section 1, and the spiral mesh belt 2 can improve the external strength of the flexible connection section 1 and further play a role in reinforcement while not affecting bending of the flexible connection section 1.

Referring to fig. 4, the connection parts of the screw heads and nuts 7 of the bolts 6 and the connection flange 4 and the butt flange 5 are provided with elastic gaskets 13, and the elastic gaskets 13 can make the connection between the bolts 6 and nuts 7 and the connection flange 4 and the butt flange 5 more compact by means of the elastic action of the elastic gaskets 13, so that a better anti-loose effect is achieved.

Working principle: when in use, the flexible connecting section 1 is arranged between two groups of butt-joint bent pipes 8 which need to be connected, then the flexible connecting section 1 is bent appropriately according to the connecting angle of the butt-joint bent pipes, so that the connecting flange plates 4 at the two ends of the flexible connecting section 1 are aligned with the butt-joint flange plates 5 at the end parts of the butt-joint bent pipes 8, after the sealing rings 11 at the connecting parts are clamped by the connecting flange plates 4 and the sealing ring clamping grooves 10 at the inner sides of the butt-joint flange plates 5 in alignment, the connecting flange plates 4 and the mounting through holes 12 at the corresponding positions on the butt-joint bent pipes 8 are locked and fixed by bolts 6 and nuts 7, the connection of the flange and the bent pipes is realized, when in use, the inner sides of the flexible connecting section 1 are formed by adopting the polyurethane inner core pipe 101 and the polyurethane layer 103 to clamp the fiber woven layer 102, and the polyurethane inner core pipe 101 and the polyurethane layer 103 have better heat preservation performance, so that the conveying requirements of different temperature mediums can be met, and polyurethane inner core tube 101 and polyurethane layer 103 still have better weather resistance, guaranteed life, fiber weaving layer 102 that sets up between polyurethane inner core tube 101 and polyurethane layer 103 is network structure, can improve the tensile properties of polyurethane inner core tube 101 and polyurethane layer 103, play better reinforcement effect, stability when improving the conveying medium, flexible coupling section 1 outermost adopts polyethylene resin sheath 104, have certain impact resistance, can play better guard effect to the inlayer, and self has better acid and alkali resistance, be difficult for receiving external environment corrosion damage, and be provided with spiral net belt 2 on polyethylene resin sheath 104 outer wall can improve flexible coupling section 1's external strength when not influencing flexible coupling section 1 and buckle, further play the effect of reinforcement.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The flange suitable for connecting the bent pipelines comprises a flexible connecting section (1), wherein a medium circulation cavity (3) is arranged in the flexible connecting section (1);

the method is characterized in that: further comprises:

connection flanges (4) mounted at both ends of the flexible connection section (1);

the butt joint flange (5) is arranged on the outer side of the connecting flange (4), a butt joint boss (9) is arranged at the front end of the butt joint flange (5), and a butt joint elbow pipe (8) is arranged at the rear end of the butt joint flange (5);

the installation through holes (12) are formed in the periphery of the connecting flange plate (4) and the butt flange plate (5), the installation through holes (12) of the connecting flange plate (4) and the butt flange plate (5) are connected through bolts (6), and nuts (7) are installed at the joints of the end parts of the bolts (6) and the connecting flange plate (4).

2. A flange adapted for use in connection with a curved pipe according to claim 1, wherein: the flexible connecting section (1) comprises a polyurethane inner core tube (101), a fiber woven layer (102), a polyurethane layer (103) and a polyethylene resin sheath (104), wherein the fiber woven layer (102) is arranged between the polyurethane inner core tube (101) and the polyurethane layer (103), and the polyethylene resin sheath (104) is arranged on the outer wall of the polyurethane layer (103).

3. A flange adapted for use in connection with curved pipelines as claimed in claim 2, wherein: the polyethylene resin sheath (104) is fixedly connected with the polyurethane layer (103) through the adhesive layer (105).

4. A flange adapted for use in connection with a curved pipe according to claim 1, wherein: the inner walls of the butt joint lug boss (9) and the connecting flange plate (4) are respectively provided with a sealing ring clamping groove (10), and a sealing ring (11) is arranged in the sealing ring clamping grooves (10).

5. A flange adapted for use in connection with a curved pipe according to claim 1, wherein: the outer wall of the flexible connecting section (1) is provided with a spiral net belt (2).

6. A flange adapted for use in connection with a curved pipe according to claim 1, wherein: elastic gaskets (13) are arranged at the joints of the screw heads and the nuts (7) of the bolts (6) and the connecting flange plate (4) and the butt flange plate (5).