CN221171196U

CN221171196U - Internal expansion type pipeline connecting device

Info

Publication number: CN221171196U
Application number: CN202322926764.0U
Authority: CN
Inventors: 解胜飞; 解傲颀
Original assignee: WUXI HUAGUANG INDUSTRIAL BOILER CO LTD
Current assignee: WUXI HUAGUANG INDUSTRIAL BOILER CO LTD
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2024-06-18
Anticipated expiration: 2033-10-31

Abstract

The utility model relates to an internal expansion type pipeline connecting device which comprises a bidirectional connecting shaft, wherein the bidirectional connecting shaft comprises a central shaft, connecting rods are respectively arranged at two ends of the central shaft, expansion cylinders are respectively sleeved on the outer sides of the connecting rods, one ends of the expansion cylinders can be matched with the side wall of the central shaft, conical slope surfaces are respectively arranged on the inner walls of the other ends of the expansion cylinders, and conical nuts which can be matched with the conical slope surfaces are respectively connected to the connecting rods in a threaded manner. According to the utility model, the conical nut is used for driving the expansion cylinder to expand, so that after the outer side wall of the expansion cylinder is expanded to tightly prop against the inner side wall of the pipeline, two pipelines to be connected can be quickly connected, and the pipelines can be quickly dismantled when the pipelines need to be dismantled, welding and cutting are not needed, the working efficiency is improved, and the processing cost is saved; the utility model has compact integral structure, simple manufacture and installation, convenient maintenance, firm connection and difficult loosening and falling.

Description

Internal expansion type pipeline connecting device

Technical Field

The utility model belongs to the technical field of pipeline processing, and relates to an internal expansion type pipeline connecting device.

Background

The boiler is used as common compression equipment and widely applied to heat supply, air supply and heat supply engineering, a convection heating surface (such as an economizer, a superheater, a reheater and the like) of the boiler usually adopts a coiled pipe structure, a plurality of boiler manufacturers in industry can adopt bent pipelines to bend pipes for production, the straight pipes are automatically welded and butted into the total length required by expanding a pipe system, after passing through balls and non-destructive inspection pass, the straight pipes are driven to move forward by a forced feeding device to be clamped and bent on a numerical control pipe bending device, and the forced feeding device and the pipe bending device are matched and arranged, so that the length from the tail end of the straight pipes to the center of the bent pipe needs to be more than 3 m-5 m during bending, the terminal part of the pipe system can be fed to the proper clamping position of the pipe bending device for bending, and the length of the pipe fed by the forced feeding device needs to be accurate, so that the position and size deviation of the terminal elbow of the pipe system is prevented from exceeding. Therefore, the conventional production method is to reserve more than 3 m-5 m of process length meeting the requirement on the structural length of each bent pipe product, or butt joint the long process straight pipes in a welding mode, remove reserved or welded process allowance after bending is finished, and process the pipe ends according to the drawing.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, solve the problem of inconvenient bending of a snake-shaped pipe and provide an internal expansion type pipeline connecting device.

In order to achieve the above purpose, the following technical scheme is adopted:

The inner expansion type pipeline connecting device comprises a bidirectional connecting shaft, an expansion cylinder and conical nuts, wherein the bidirectional connecting shaft comprises a central shaft, connecting rods are respectively arranged at two ends of the central shaft, the outer sides of the connecting rods are respectively sleeved with the expansion cylinder, one end of the expansion cylinder can be matched with the side wall of the central shaft, conical slope surfaces are respectively arranged on the inner walls of the other ends of the expansion cylinders, the conical nuts which can be matched with the conical slope surfaces are respectively connected to the connecting rods in a threaded mode, and threads on the connecting rods are screwed to each other; one end of the conical nut is provided with a connecting cylinder, the outer side wall of the connecting cylinder is respectively provided with a convex block, and the expanding cylinder is respectively provided with a guide groove which can be matched with the convex block.

Preferably, clamping grooves are respectively formed in the outer side wall of the end part of the expansion cylinder, which is close to the conical nut, and elastic ferrules are respectively arranged in the clamping grooves.

Preferably, the outer side walls of the ends of the expansion cylinders far away from the conical nuts are respectively provided with an arc-shaped groove.

Preferably, the outer side wall of the center shaft is symmetrically provided with clamping grooves.

Preferably, the number of the convex blocks is 4, and the convex blocks are circumferentially and uniformly distributed on the outer side wall of the connecting cylinder.

Compared with the prior art, the utility model has the following advantages:

According to the utility model, the conical nut is used for driving the expansion cylinder to expand, so that after the outer side wall of the expansion cylinder abuts against the inner side wall of the pipeline, two pipelines to be connected can be quickly connected, and the pipelines can be quickly dismantled when the pipelines need to be dismantled, welding and cutting are not needed, the working efficiency is improved, and the processing cost is saved; the root arc-shaped groove structure of the expansion cylinder and the groove at the periphery of the expansion joint part are sleeved with an elastic ferrule structure, so that the elasticity of the periphery of the expansion joint part of the expansion cylinder is improved, and the expansion and recovery life and performance of the expansion cylinder are enhanced; the utility model has compact integral structure, simple manufacture and installation, convenient maintenance, firm connection and difficult loosening and falling.

Drawings

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

FIG. 2 is a schematic view of section A-A of FIG. 1.

FIG. 3 is a schematic view of section B-B of FIG. 1.

Fig. 4 is a schematic view of a bidirectional connecting shaft according to the present utility model.

Fig. 5 is a schematic view of a cone nut of the present utility model.

Fig. 6 is a schematic view of an expansion cylinder according to the present utility model.

In the figure: 1. a bidirectional connecting shaft; 2. a center shaft; 3. an expansion cylinder; 4. a cone nut; 5. a connecting rod; 6. a conical ramp; 7. a connecting cylinder; 8. a bump; 9. a guide groove; 10. a clamping groove; 11. an elastic ferrule; 12. an arc-shaped groove; 13. a clamping groove; 14. a pipeline.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

As shown in fig. 1-6, an internal expansion type pipeline connecting device comprises a bidirectional connecting shaft 1, an expansion cylinder 3 and a conical nut 4, wherein the bidirectional connecting shaft 1 comprises a middle shaft 2, and the middle shaft 2 is used for firmly connecting two pipelines 14 to be connected into a whole;

The two ends of the center shaft 2 are respectively provided with a connecting rod 5, the outer sides of the connecting rods 5 are respectively sleeved with an expansion cylinder 3, one end of the expansion cylinder 3 can be matched with the side wall of the center shaft 2, and the expansion cylinders 3 are respectively positioned at the two ends of the center shaft 2;

The inner wall of the other end of the expansion cylinder 3 is respectively provided with a conical slope 6, the connecting rods 5 are respectively connected with conical nuts 4 which can be matched with the conical slope 6 in a screwed mode, when the two-way connecting shafts 1 rotate, due to the fact that the screw threads of the two connecting rods 5 are opposite in rotation direction, the conical nuts 4 are simultaneously inwards closed or outwards separated, when the conical nuts 4 are inwards closed, the outer side walls of the conical nuts penetrate into the conical slope 6 of the expansion cylinder 3, the expansion cylinder 3 is enabled to expand outwards, at the moment, the outer side walls of the expansion cylinder 3 can prop against the inner side walls of the pipelines 14, the two pipelines 14 are fixed on the two-way connecting shafts 1 and cannot fall off, and the connecting function of the pipelines 14 is achieved;

One end of the cone nut 4 is provided with a connecting cylinder 7, the outer side wall of the connecting cylinder 7 is respectively provided with a convex block 8, the expansion cylinder 3 is respectively provided with a guide groove 9 which can be matched with the convex block 8, and the convex block 8 is matched with the guide groove 9, so that the cone nut cannot rotate along with the bidirectional connecting shaft 1, but transversely moves on the connecting rod 5, and the expansion cylinder 3 is conveniently expanded.

Further, the outer side walls of the end parts of the expansion cylinder 3, which are close to the conical nuts 4, are respectively provided with a clamping groove 10, the clamping grooves 10 are respectively provided with an elastic ferrule 11, and the elastic ferrules 11 can increase friction force between the expansion cylinder 3 and the pipeline 14, so that the connection between the pipeline 14 and the expansion cylinder 3 is tighter.

Further, the outer side walls of the end parts of the expansion cylinder 3 far away from the conical nuts 4 are respectively provided with an arc-shaped groove 12, and the arc-shaped grooves 12 facilitate the expansion cylinder 3 to be easier to open.

Further, the clamping grooves 13 are symmetrically formed in the outer side wall of the center shaft 2, and the clamping grooves 13 facilitate workers to rotate the center shaft 2 by using a wrench, so that the whole rotation of the bidirectional connecting shaft 1 is easier.

Further, the number of the protruding blocks 8 is 4, the circumference is uniformly distributed on the outer side wall of the connecting cylinder 7, and the plurality of protruding blocks 8 are matched with the guide grooves 9, so that stability of the device in the expanding process and uniformity of the inner wall of the contact pipeline 14 are effectively guaranteed.

Working principle: when the utility model is used, the two expansion cylinders 3 are respectively sleeved on the outer sides of the connecting rods 5, then the two cone nuts 4 are respectively screwed on the connecting rods 5 (the convex blocks 8 on the connecting cylinders 7 are required to be accurately inserted into the guide grooves 9 when the cone nuts 4 are installed), and then the two pipelines 14 to be connected are respectively sleeved on the expansion cylinders 3, so that the pipelines 14 are firmly connected, and the end parts of the pipelines 14 are required to be pressed close to the side walls of the center shafts 2;

The staff twists the middle shaft 2 by using a spanner, the middle shaft 2 drives the bidirectional connecting shaft 1 to integrally rotate, the threads of the two connecting rods 5 are in opposite rotation directions, and the two conical nuts 4 synchronously draw together inwards when the two connecting rods 5 rotate due to the cooperation between the convex blocks 8 and the guide grooves 9, when the two conical nuts 4 draw together inwards, the two expansion cylinders 3 expand along with the expansion cylinders, the outer side walls of the expansion cylinders 3 support the inner side walls of the pipelines 14, so that the two pipelines 14 are fixed on the bidirectional connecting shaft 1 and cannot fall off, and the connecting function of the pipelines 14 is realized; the elastic collar 11 on the expansion cylinder 3 can increase the friction between the expansion cylinder 3 and the pipe 14, so that the connection between the pipe 14 and the expansion cylinder 3 is tighter.

It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present utility model, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the utility model, and are also considered to be within the scope of the utility model.

Claims

1. The utility model provides an interior expanding type pipeline connecting device, includes two-way connecting axle (1), a section of thick bamboo (3) and cone nut (4), characterized by: the bidirectional connecting shaft (1) comprises a central shaft (2), connecting rods (5) are respectively arranged at two ends of the central shaft (2), expansion cylinders (3) are respectively sleeved on the outer sides of the connecting rods (5), one ends of the expansion cylinders (3) can be matched with the side wall of the central shaft (2), conical slope surfaces (6) are respectively arranged on the inner walls of the other ends of the expansion cylinders (3), conical nuts (4) which can be matched with the conical slope surfaces (6) are respectively connected to the connecting rods (5) in a threaded mode, and threads on the connecting rods (5) are in a screwing mode; one end of the conical nut (4) is provided with a connecting cylinder (7), the outer side wall of the connecting cylinder (7) is respectively provided with a convex block (8), and the expansion cylinder (3) is respectively provided with a guide groove (9) which can be matched with the convex block (8).

2. An internal expanding pipe connection as defined in claim 1, wherein: clamping grooves (10) are respectively formed in the outer side wall of the end part, close to the conical nut (4), of the expansion cylinder (3), and elastic ferrules (11) are respectively arranged in the clamping grooves (10).

3. An internal expanding pipe connection as defined in claim 1, wherein: arc grooves (12) are respectively formed in the outer side walls of the end parts, far away from the conical nuts (4), of the expansion cylinders (3).

4. An internal expanding pipe connection as defined in claim 1, wherein: clamping grooves (13) are symmetrically formed in the outer side wall of the center shaft (2).

5. An internal expanding pipe connection as defined in claim 1, wherein: the number of the convex blocks (8) is 4, and the convex blocks are circumferentially and uniformly distributed on the outer side wall of the connecting cylinder (7).