CN108930848A - Hollow wall spiral steel ripple reinforced pipe - Google Patents

Abstract

The invention relates to a hollow-wall spiral steel corrugated reinforced pipe. The pipe is spirally wound and fused with a plastic hollow special-shaped strip to form a hollow-wall pipe body. The two sides of the plastic hollow special-shaped strip have supports, and the spiral The outer sides of the two supports that are close to each other are welded to each other in the adjacent plastic hollow special-shaped strips wound in the same way. The middle part of the plastic hollow special-shaped strips is wound with a reinforcing tube. The reinforcing tube is composed of two layers, and the inner layer is metal soft. The outer layer is a polyethylene tube, and the polyethylene tube is welded together with the inner surface of the support body and the surface of the plastic hollow special-shaped strip. It uses metal hose as the corrugation, which greatly reduces the raw material formulation cost of the pipe, and is the development trend of the corrugated reinforced pipe in the future. It adopts a hollow support body arranged on both sides of the metal hose to support the metal hose, so that the metal hose can be reliably fixed, and the ring stiffness of the product is greatly improved.

Description

Hollow wall spiral steel corrugated reinforced pipe

【Technical field】

The invention relates to the technical field of pipes, in particular to a hollow-wall spiral steel corrugated reinforced pipe.

【Background technique】

Now, the winding reinforced pipe has already been widely used at home and abroad for buried rainwater and sewage drainage pipes. It has the advantages of long service life, stable and reliable quality, convenient socket connection, and good airtightness.

With the increase of urban population, the caliber of the buried pipeline design requirements is constantly increasing. At the same time, with the increase of the caliber, a greater buried depth is also required. These conditions require the pipe to have a higher environmental protection. Stiffness index to prevent crushing and other phenomena during use.

However, most of the current winding reinforced pipes are made of polyethylene winding pipes, which have high cost and low ring stiffness, and the winding pipes often break during the transportation process, which affects the qualified rate of the product.

【Content of invention】

In order to solve the above problems, the object of the present invention is to provide a hollow-wall spiral steel corrugated reinforced pipe that can improve the ring stiffness.

In order to achieve the above purpose, the technical solution adopted by the present invention is: a hollow-wall spiral steel corrugated reinforced pipe, which is spirally wound and fused by a plastic hollow special-shaped strip to form a hollow-wall pipe body, and the plastic hollow special-shaped strip There are supports on both sides, and the outer surfaces of the two supports that are close to each other between the adjacent plastic hollow special-shaped strips wound in a spiral manner are welded to each other. The middle part of the plastic hollow special-shaped strips is wound with a reinforcing tube, and the reinforcing tube consists of two The inner layer is a metal hose, and the outer layer is a polyethylene tube, and the polyethylene tube is welded together with the inner surface of the support body and the surface of the plastic hollow special-shaped strip.

The hollow wall spiral steel corrugated reinforced pipe in the present invention is further set as follows: the reinforced pipe is higher than the surface of the support body, and the height of the reinforced pipe above the surface of the support body is between 1/5 and 4/5 of the diameter of the reinforced pipe .

The hollow-walled spiral steel corrugated reinforced pipe in the present invention is further configured as follows: the inner surface of the support body is a concave arc matching the surface of the reinforced pipe.

The hollow-wall spiral steel corrugated reinforced pipe in the present invention is further configured as follows: the support body is a hollow structure.

Compared with the prior art, the present invention has the following beneficial effects: the above-mentioned hollow-walled spiral steel corrugated reinforced pipe adopts a metal hose as the corrugation, and the current price of the metal hose is 2/3 of that of the polyethylene raw material, which greatly reduces The raw material formula cost of the pipe is the development trend of the corrugated reinforced pipe in the future. Since the metal hose can be bent freely within a certain bending radius and has a high ring stiffness, it reduces the appearance of the steel belt corrugated pipe after being rolled and wound on the plastic pipe body in the original steel bellows process. The steel strip bending memory does not overcome the problem of making the steel strip warp. It adopts a hollow support body arranged on both sides of the metal hose to form a support for the metal hose, so that the metal hose can be fixed reliably, and the ring stiffness of the product is greatly improved. After testing, under the weight of the same product, the product's The ring rigidity is increased by more than 20%, the metal strength is greater than 450MPA, and the plastic strength is 25MPA. In addition, because the wave bottom adopts a double-layer hollow wall structure, the pipe will not leak due to sharp objects piercing the wave bottom during actual construction, and the entire pipe will not be dug out. The product can be adjusted to produce different ring stiffnesses according to customer needs. It is a new type of product with the highest performance in domestic drainage pipe products. The production process is simple, which reduces the fracture phenomenon during transportation caused by the unstable quality of the original PP bellows, improves the qualified rate of products, and reduces costs.

【Description of drawings】

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is the structural representation of another kind of embodiment of the present invention;

In the figure: 1. Plastic hollow special-shaped strip, 2. Support body, 3. Reinforcing tube, 4. Metal hose, 5. Polyethylene tube, 6. Arc.

【Detailed ways】

The hollow-wall spiral steel corrugated reinforced pipe of the present invention will be further described in detail through specific examples below.

As shown in Figure 1, the hollow-wall spiral steel corrugated reinforced pipe is made of a plastic hollow special-shaped strip 1 that is spirally wound and fused to form a hollow-wall pipe body. The two sides of the plastic hollow special-shaped strip 1 have supports. 2. The outer surfaces of the two supporting bodies 2 close to each other between the adjacent plastic hollow special-shaped strips 1 wound in a spiral manner are welded to each other, and the middle part of the plastic hollow special-shaped strips 1 is wound with a reinforcing tube 3, and the reinforcing tube 3 is made of Composed of two layers, the inner layer is a metal hose 4, and the outer layer is a polyethylene tube 5, and the polyethylene tube 5 is welded together with the inner surface of the support body 2 and the surface of the plastic hollow special-shaped strip 1.

As a preferred solution, the reinforcement tube 3 is higher than the surface of the support body 2 , and the height of the reinforcement tube 3 above the surface of the support body 2 is between 1/5 and 4/5 of the diameter of the reinforcement tube 3 . The inventors have found in long-term practice that the height of the reinforcement tube 3 above the surface of the support body 2 is within the above-mentioned range, which can not only ensure the connection reliability of the reinforcement tube 3 but also ensure the best ring stiffness.

As a preferred solution, the support body 2 is a hollow structure. Thereby further saving the required materials, reducing the meter weight of the product, increasing the line speed during production, and saving costs.

Another embodiment is shown in FIG. 2 , the inner surface of the support body 2 is a concave arc 6 matching the surface of the reinforcing tube 3 . Therefore, the welding area between the support body 2 and the reinforcing tube 3 is increased, so that the fixing of the reinforcing tube 3 is more reliable, and the ring stiffness of the product is further improved.

The above-mentioned hollow-walled spiral steel corrugated reinforced pipe is first extruded with an extruder to extrude the continuous plastic special-shaped strips 1 with hollow cavity supports 2 on both sides; then the obtained plastic special-shaped strips 1 are spirally arranged It is wound on the continuously rotating forming roller, so that the outer sidewalls of the supports 2 of the adjacent plastic shaped strips 1 are close to each other and form a gap, and the molten plastisol is continuously squeezed into the gap with an extruder, and the forming roller is used Apply rolling pressure to the gap, so that the outer sidewalls of the supports 2 of the adjacent plastic shaped strips 1 are welded to each other, and a layer of polyethylene pipe 5 is coated on the outside of the metal hose 4 to form a reinforced pipe 3, and then The polyethylene pipe 5 is welded together with the inner surface of the support body 2 and the surface of the plastic hollow special-shaped strip 1 to form corrugations.

The above-mentioned hollow wall spiral steel corrugated reinforced pipe 3 adopts the metal hose 4 as the corrugation. The current price of the metal hose 4 is 2/3 higher than that of polyethylene raw materials, which greatly reduces the cost of the raw material formulation of the pipe, and is the future corrugated reinforced pipe. 3 development trend. Since the metal hose 4 can be bent freely within a certain bending radius and has high ring rigidity, it reduces the way in which the steel belt is wound and bonded to the plastic pipe body after rolling in the original steel belt bellows process The emerging strip bend memory does not overcome the problem of causing the strip to warp. It uses a hollow support body 2 to be arranged on both sides of the metal hose 4 to form a support for the metal hose 4, so that the metal hose 4 can be fixed reliably, and the ring stiffness of the product is greatly improved. After testing, the weight of the same product is Under this condition, the ring stiffness of the product is increased by more than 20%, the metal strength is greater than 450MPA, and the plastic strength is 25MPA. In addition, because the wave bottom adopts a double-layer hollow wall structure, the pipe will not leak due to sharp objects piercing the wave bottom during actual construction, and the entire pipe will not be dug out. The product can be adjusted to produce different ring stiffnesses according to customer needs. It is a new type of product with the highest performance in domestic drainage pipe products. The production process is simple, which reduces the fracture phenomenon during transportation caused by the unstable quality of the original PP bellows, improves the qualified rate of products, and reduces costs.

The above-mentioned embodiment only illustrates the principle of the present invention and its effect, and the embodiment of partial use, but is not intended to limit the present invention; It should be pointed out that for those of ordinary skill in the art, without departing from the Under the premise of creating ideas, some modifications and improvements can also be made, which all belong to the protection scope of the present invention.

Claims (4)

1. hollow wall spiral steel ripple reinforced pipe, which is to be helically wound by plastic hollow heterotypic strip and fuse shape At hollow wall tubing ontology, it is characterised in that: the two sides of the plastic hollow heterotypic strip have supporter, twine in a spiral manner Around adjacent plastic hollow heterotypic strip between two supporters adjacent to each other the mutual welding of lateral surface, plastic hollow is different Reinforced pipe is wound in the middle part of type band, reinforced pipe is formed by two layers, and internal layer is metal hose, and outer layer is polyethylene pipe, described Polyethylene pipe and the medial surface of the supporter and the surface phase welding one of plastic hollow heterotypic strip.

2. hollow wall spiral steel ripple reinforced pipe as described in claim 1, it is characterised in that: the reinforced pipe is higher than supporter Surface, and reinforced pipe be higher by supporting body surface height be enhance pipe diameter 1/5~4/5 between.

3. hollow wall spiral steel ripple reinforced pipe as claimed in claim 1 or 2, it is characterised in that: the inside of the supporter Face is the arc of the indent matched with enhancing pipe surface.

4. hollow wall spiral steel ripple reinforced pipe as claimed in claim 1 or 2, it is characterised in that: the supporter is hollow Structure.