CN205331632U - Wound form bellows with cavity outer tube - Google Patents

Abstract

The utility model discloses a winding corrugated pipe with a hollow outer pipe, which comprises an outer pipe and an inner pipe. The outer pipe is a flat-wall plastic pipe with a hollow core, and the outer pipe is spirally wound on the inner pipe. On the outer wall of the tube, the contact parts between the outer tubes are melted and connected, and the contact parts of the outer tube and the inner tube are melted and connected. The utility model provides a winding corrugated pipe with a hollow outer pipe, which has the advantages of simple structure, convenient production, good sealing performance, bending resistance, fracture resistance and long service life.

Description

A winding bellows with a hollow outer tube

technical field

The utility model belongs to the technical field of bellows, in particular to a winding bellows with a hollow outer tube.

Background technique

Bellows is a new type of pipe with a ring-shaped outer wall and a smooth inner wall. It was first successfully developed in Germany in the early 1980s. After more than ten years of development and improvement, it has developed from a single variety to a complete product series. It is currently in production The technology and application technology are very mature. Due to its excellent performance and relatively economical cost, it has been greatly promoted and applied in developed countries such as Europe and the United States. In my country, the promotion and application of corrugated pipes are on the rise, and all technical indicators have reached the use standards. They are generally used on pipelines laid in water conservancy systems. Such pipelines are generally laid underground, and the working environment is harsh. The ground pressure is relatively high. Due to the limited pressure resistance and bending resistance of the existing bellows, bending and fracture often occur due to excessive pressure. Because the head and neck of the bellows are not protected by external corrugations, the The phenomenon of bending and fracture is more serious. At the same time, due to the poor sealing of the joints between the bellows, water leakage also occurs from time to time, which seriously affects the service life of the bellows, and then affects road traffic safety.

Utility model content

Aiming at the deficiencies of the prior art, the utility model provides a winding corrugated pipe with a hollow outer pipe with simple structure, convenient production, good sealing performance, bending resistance, fracture resistance and long service life.

In order to realize the purpose of the utility model, the utility model adopts the following technical solutions:

A winding bellows with a hollow outer tube, comprising an outer tube and an inner tube, the outer tube is a flat-walled plastic tube with a hollow core, the outer tube is spirally wound on the outer wall of the inner tube, the The contact parts between the outer tubes are melted and connected, the contact parts of the outer tube and the inner tube are melted and connected, and the outer tube protects the inner tube as a whole.

Preferably, a transverse reinforcing rib is provided between the outer tube and the inner tube, which enhances the bending resistance and fracture resistance of the corrugated tube as a whole.

Preferably, the transverse reinforcing rib is integrally formed with the inner tube wall.

Preferably, several buckles are provided inside the head of the inner tube, which can prevent the interface from moving when the corrugated tube is connected.

Preferably, there are three buckles, so that the connection of the bellows is tighter.

The beneficial effects of the utility model are: the utility model provides a winding bellows with a hollow outer tube with simple structure, convenient production, good sealing performance, bending resistance, fracture resistance and long service life.

Description of drawings

Fig. 1 is the structural representation of the utility model;

In the figure: 1. Outer pipe; 2. Inner pipe; 3. Transverse rib; 4. Buckle.

detailed description

The utility model will be further described below in conjunction with the accompanying drawings through specific embodiments.

As shown in Figure 1, a winding corrugated pipe with a hollow outer tube includes an outer tube 1 and an inner tube 2, the outer tube 1 is a flat-walled plastic tube with a hollow core, and the outer tube 1 is spirally Wrapped on the outer wall of the inner tube 2, the contact parts between the outer tubes 1 are melted and connected, the contact parts of the outer tube 1 and the inner tube 2 are melted and connected, the outer tube 1 protects the inner tube 2 as a whole, A transverse reinforcing rib 3 is provided between the outer tube 1 and the inner tube 2, which enhances the bending resistance and fracture resistance of the bellows as a whole, and the transverse reinforcing rib 3 is integrated with the wall of the inner tube 2 Forming, the inner side of the head of the inner tube 2 is provided with several buckles 4, which can prevent the interface from moving when the bellows are connected. There are three buckles 4, which make the bellows connection more tightly.

The above is only a specific embodiment of the utility model, but the structural features of the utility model are not limited thereto, the utility model can be used for similar products, any skilled person in the field of the utility model , the changes or modifications made are all covered by the patent scope of the present utility model.

Claims (5)

1. A winding bellows with a hollow outer tube, comprising an outer tube and an inner tube, characterized in that: the outer tube is a flat-walled plastic tube with a hollow core, and the outer tube is spirally wound on the On the outer wall of the inner tube, the contact parts between the outer tubes are melted and connected, and the contact parts of the outer tube and the inner tube are melted and connected. 2. The wound corrugated pipe with a hollow outer tube according to claim 1, wherein a transverse reinforcing rib is provided between the outer tube and the inner tube. 3. The wound corrugated pipe with hollow outer pipe according to claim 2, characterized in that: the transverse reinforcing rib is integrally formed with the wall of the inner pipe. 4. The winding bellows with hollow outer tube according to claim 1 or 3, characterized in that: there are several buckles inside the head of the inner tube. 5. The wound corrugated pipe with a hollow outer tube according to claim 4, characterized in that there are three buckles.