CN204477519U - A kind of PE fuel tube - Google Patents

Abstract

The utility model discloses a kind of PE fuel tube, comprise the first polyethylene layer, the second polyethylene layer and the wearing layer that set gradually from inside to outside, wherein: the first polyethylene layer, it is cylindrical-shaped structure, the hollow space of fuel gas flow is provided with in first polyethylene layer, first polyethylene layer material is medium density polyethylene, and the inwall of the first polyethylene layer is provided with many long strip fins vertically; Second polyethylene layer, it is positive eight prism structures, and the second polyethylene layer material is high density polyethylene (HDPE); And wearing layer, it is cylindrical-shaped structure, and the material of wearing layer is alloyed steel, and wearing layer sidewall has through hole, and be provided with moveable piston in through hole and be provided with sheet metal, sheet metal is provided with pressure transducer, pressure transducer electrical connection alarm.The utility model can transport combustion gas safely and effectively, has the advantages such as powerful compressive strength, good sanitation performance, decay resistance and warning function.

Description

A PE gas pipe

technical field

The utility model relates to gas pipeline equipment, in particular to a PE gas pipe.

Background technique

With the continuous development of the city, urban infrastructure, environmental protection facilities and residential construction are growing rapidly, and the amount of buried equipment used for gas pipelines is increasing. PE gas pipe is a polyethylene gas pipe, which is a new type of pipe for transporting natural gas, artificial gas and liquefied petroleum gas. It has the advantages of reliable connection, low temperature thermal shock resistance, good stress crack resistance, good chemical corrosion resistance, aging resistance, and convenient handling.

But at present, the demand for large-diameter pipes has greatly increased. Pure PE pipes have to increase the wall thickness to ensure the pressure level of SDR11. With the rise of oil prices, the price of polyethylene raw materials has been rising steadily. How to balance cost and compressive performance is a problem. . And after the gas leaks, it will cause fatal injury if it is breathed into the lungs, so the occurrence of gas leakage must not be allowed in the municipal pipeline system. However, the existing PE gas pipeline is a single-layer pipeline, which may have defects such as easy leakage, low compressive strength, and easy corrosion.

Utility model content

An object of the present invention is to solve at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described hereinafter.

Another purpose of the utility model is to provide a PE gas pipe, which can safely and effectively transport gas, and has the advantages of strong compressive strength, good hygienic performance, corrosion resistance and alarm function.

In order to achieve these objects and other advantages according to the present utility model, a PE gas pipe is provided, including a first polyethylene layer, a second polyethylene layer and a wear-resistant layer arranged sequentially from the inside to the outside, wherein:

The first polyethylene layer has a cylindrical structure, the first polyethylene layer is provided with a hollow space for gas flow, the wall thickness of the first polyethylene layer is 2.0-2.8mm, and the first polyethylene layer The material of the layer is medium-density polyethylene, and the inner wall of the first polyethylene layer is provided with a plurality of strip-shaped ribs along the axial direction of the PE gas pipe. For any rib, the pitch of the ribs is 40 -60cm, the thickness of the rib is 0.3-0.5mm;

The second polyethylene layer has a regular octagonal prism structure, the second polyethylene layer is provided with a hollow space for accommodating the first polyethylene layer, the thickness of the second polyethylene layer is 1.2-1.6mm, and the The material of the second polyethylene layer is high-density polyethylene; and

Wear-resistant layer, which is a cylindrical structure, the wear-resistant layer is provided with a hollow space to accommodate the second polyethylene layer, the thickness of the wear-resistant layer is 8.0-9.0mm, and the material of the wear-resistant layer It is alloy steel, a through hole is opened on the side wall of the wear-resistant layer, a movable piston is arranged on the side close to the second polyethylene layer in the through hole, and a movable piston is arranged in the through hole away from the second polyethylene layer. The other side of the polyethylene layer is provided with a metal plate, and the metal plate is provided with a pressure sensor, and the pressure sensor is electrically connected to an alarm.

Preferably, the PE gas pipe also includes a support layer, the support layer is filled between the second polyethylene layer and the wear-resistant layer, the support layer is a woven mesh columnar structure, the The thickness of the support layer is 1.0-1.4mm, and the material of the support layer is carbon fiber.

Preferably, for the PE gas pipe, the outer wall of the wear-resistant layer is coated with polyurethane paint.

Preferably, for the PE gas pipe, the density of the medium density polyethylene is 0.931g/cm ³ .

Preferably, for the PE gas pipe, the density of the high-density polyethylene is 0.959g/cm ³ .

Preferably, in the PE gas pipe, the piston is made of rubber.

Preferably, in the PE gas pipe, the piston has a cylindrical structure, the diameter of the piston is equal to the diameter of the through hole, and the axial length of the piston is 3.5-4.0 mm.

Preferably, for the PE gas pipe, the metal plate is integrally formed with the wear-resistant layer.

The utility model at least includes the following beneficial effects:

First, the PE gas pipe is designed as a multi-layer structure in which the inner layer adopts the first polyethylene layer, followed by the second polyethylene layer and the wear-resistant layer. The layers are distinct and the division of labor is clear, which ensures the impact resistance of the gas pipe and At the same time, it has the performance of alarm, noise reduction and wear resistance;

Second, the inner layer is made of non-toxic, non-fouling layer of medium-density polyethylene material layer, compared with high-density polyethylene material to ensure good hygienic performance, the wall thickness is 2.0-2.8mm to ensure the impact strength, in line with National standard for gas pipelines, the inner wall is provided with long strips of convex ribs, the thickness of which is 0.3-0.5mm, which not only guides the gas flow, but also enhances the strength of the polyethylene layer. The pitch is 40-60cm, which is convenient for cutting PE gas pipelines , It also avoids the obstruction of gas flow caused by too dense pitch;

Third, the first polyethylene layer is coated with a second polyethylene layer composed of a high-density polyethylene material with a large molecular weight and better mechanical properties, which strengthens the impact resistance and crack resistance of the pipeline. The structure of a regular octagonal prism is similar to Circular, but smaller than the circular area, it increases the thickness of the polyethylene material while saving raw materials. The thickness of 1.2-1.6mm can not only meet the protection of the strength of the inner pipe, but also balance the cost;

Fourth, the second polyethylene layer is coated with a wear-resistant layer to protect the pipeline material, prolong the life of the pipeline, and facilitate the construction of buried pipelines. The alloy steel has high strength and toughness, and the thickness of 8.0-9.0mm has good wear resistance At the same time, the through hole is deep enough to allow the piston to move during the period. When the gas leaks, the gas flow in the gap between the second polyethylene layer and the wear-resistant layer pushes the piston towards the metal plate, and the gas exerts pressure on the metal plate. , connected to the alarm to send out an alarm sound, and play an alarm function;

Fifth, set a support layer between the second polyethylene layer and the wear-resistant layer. The cross section of the support layer is a mesh structure, which is connected with the top corners of the second polyethylene layer and strengthens the inner polyethylene pipe. , to support the external wear-resistant layer, increase the space for gas to flow when it leaks, and prolong the safety time. The thickness of 1.0-1.4mm ensures that the gas can flow in the gap, and realizes the role of strengthening and supporting;

Sixth, the outer wall of the wear-resistant layer is coated with corrosion-resistant paint. The polyurethane paint has strong adhesion, impermeability, and corrosion resistance, and protects the pipeline from the influence of soil acidity and alkali and climate;

Seventh, the piston is made of rubber, which has a certain sealing function. It is consistent with the structure of the through hole and the size matches. The axial length of the rubber is 3.5-4.0mm lower than the depth of the through hole, and it can move in the through hole driven by the gas flow ;

Eighth, there is a metal plate on the other side of the through hole, and the metal plate and the wear-resistant layer are integrally formed. On the one hand, the metal plate has a strong pressure resistance and can withstand the pressure of the gas flow; The sensor is sensitive to the change of the gas flow in the pipe, and makes a keen judgment on whether the pipeline is leaking.

Other advantages, objectives and features of the utility model will partly be embodied through the following description, and partly will be understood by those skilled in the art through the research and practice of the utility model.

Description of drawings

Fig. 1 is a schematic structural view of the PE gas pipe described in the present invention.

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it by referring to the description.

It should be understood that terms such as "having", "comprising" and "including" as used herein do not entail the presence or addition of one or more other elements or combinations thereof.

Figure 1 shows an implementation form of the present utility model, a PE gas pipe, including a first polyethylene layer 1, a second polyethylene layer 2, a support layer 3 and a wear-resistant layer 4 arranged in sequence from inside to outside ,in:

The first polyethylene layer 1, which is a cylindrical structure, is provided with a hollow space for gas flow in the first polyethylene layer 1, and the wall thickness of the first polyethylene layer 1 is 2.0-2.8mm, which ensures the resistance The impact strength is in line with the national standard for gas pipelines. The first polyethylene layer 1 is made of medium-density polyethylene, which is non-toxic and has no fouling layer. Compared with high-density polyethylene materials, it ensures good hygienic performance. The inner wall of the first polyethylene layer 1 is provided with a plurality of strip-shaped ribs along the axial direction of the PE gas pipe, which not only guides the gas flow, but also enhances the strength of the polyethylene layer. For any rib , the pitch of the ribs is 40-60 _cm , and the thickness of the ribs is 0.3-0.5mm, which is convenient for cutting PE gas pipelines, and also avoids hindering the fluidity of the gas flow caused by too dense pitch;

The second polyethylene layer 2 has a regular octagonal prism structure. The structure of a regular octagonal prism is similar to a circle, but has a smaller area than a circle, which increases the thickness of the polyethylene material while saving raw materials. In the second polyethylene layer 2 There is a hollow space for accommodating the first polyethylene layer 1, and the thickness of the second polyethylene layer 2 is 1.2-1.6mm, which can not only meet the protection of the strength of the inner pipeline, but also balance the cost. The second polyethylene layer 2 is made of high-density polyethylene, which has a large molecular weight and better mechanical properties, and strengthens the impact resistance and crack resistance of the pipeline; and

Wear-resistant layer 4, which is a cylindrical structure, the wear-resistant layer 4 is provided with a hollow space to accommodate the second polyethylene layer 2, the thickness of the wear-resistant layer 4 is 8.0-9.0mm, has a good At the same time, the through hole is deep enough to allow the piston to move during the period. The wear-resistant layer 4 is made of alloy steel with high strength and high toughness, which can protect the pipeline material, prolong the service life of the pipeline, and facilitate the installation of buried pipelines. Construction, the side wall of the wear-resistant layer 4 is provided with a through hole, the side of the through hole close to the second polyethylene layer 2 is provided with a movable piston 5, and the inside of the through hole is far away from the first polyethylene layer. The other side of the two polyethylene layers 2 is provided with a metal plate 6 , and a pressure sensor is provided on the metal plate 6 , and the pressure sensor is electrically connected to an alarm 7 .

In this technical solution, the PE gas pipe is designed as a multi-layer structure in which the first polyethylene layer 1 is used as the inner layer, and the second polyethylene layer 2 and the wear-resistant layer 4 are covered in turn. The layers are distinct and the division of labor is clear, ensuring that In addition to the impact resistance and strength of the gas pipe, it also has the performance of alarm, noise reduction and wear resistance. When the gas leaks, the gas flow in the gap between the second polyethylene layer 2 and the wear-resistant layer 4 pushes the piston 5 to move towards the metal plate 6, and the gas generates pressure on the metal plate 6, and the alarm 7 sends out an alarm sound, which acts as an alarm. Function.

In another embodiment, the PE gas pipe further includes a support layer 3, and the support layer 3 is filled between the second polyethylene layer 2 and the wear-resistant layer 4. The polyethylene pipe acts as a reinforcement and supports the external wear-resistant layer 4, which increases the space for the gas to flow when it leaks and prolongs the safety time. The support layer 3 is a columnar structure of braided mesh surface, and the support layer 3 The thickness of the support layer is 1.0-1.4mm, which ensures that the gas can flow in the gap, and realizes the strengthening and supporting functions. The material of the support layer 3 is carbon fiber.

In another embodiment, for the PE gas pipe, the outer wall of the wear-resistant layer 4 is coated with polyurethane coating, which has strong adhesion, anti-penetration and corrosion resistance, and protects the pipeline from the influence of soil acidity and alkali and climate.

In another embodiment, for the PE gas pipe, the density of the medium density polyethylene is 0.931g/cm ³ .

In another embodiment, for the PE gas pipe, the density of the high-density polyethylene is 0.959g/cm ³ .

In another embodiment, in the PE gas pipe, the piston 5 is made of rubber and has a certain sealing function.

In another embodiment, the PE gas pipe, the piston 5 is a cylindrical structure, the diameter of the piston 5 is equal to the diameter of the through hole, the piston 5 is consistent with the structure of the through hole, and the size matches , the axial length of the piston 5 is 3.5-4.0mm, which is lower than the depth of the through hole, and can move in the through hole driven by the gas flow.

In another embodiment, for the PE gas pipe, the metal plate 6 and the wear-resistant layer 4 are integrally formed. On the one hand, the metal plate 6 has a strong pressure resistance and can withstand the pressure of the gas flow; The hole is set with a plate, which is convenient for installing the pressure sensor, which is sensitive to the change of the gas flow in the pipe, and makes a keen judgment on whether the pipeline is leaking.

Although the embodiment of the present utility model has been disclosed as above, it is not limited to the use listed in the description and the implementation, and it can be applied to various fields suitable for the present utility model. For those familiar with the art, Further modifications can be readily effected, so the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (8)

1. a PE fuel tube, is characterized in that, comprises the first polyethylene layer, the second polyethylene layer and the wearing layer that set gradually from inside to outside, wherein:

First polyethylene layer, it is cylindrical-shaped structure, the hollow space of fuel gas flow is provided with in described first polyethylene layer, the wall thickness of described first polyethylene layer is 2.0-2.8mm, described first polyethylene layer material is medium density polyethylene, and the inwall of described first polyethylene layer is axially arranged with many long strip fins, for any fin along described PE fuel tube, the pitch of described fin is 40-60cm, and the thickness of described fin is 0.3-0.5mm;

Second polyethylene layer, it is positive eight prism structures, is provided with the hollow space holding described first polyethylene layer in described second polyethylene layer, and the thickness of described second polyethylene layer is 1.2-1.6mm, and described second polyethylene layer material is high density polyethylene (HDPE); And

Wearing layer, it is cylindrical-shaped structure, the hollow space holding described second polyethylene layer is provided with in described wearing layer, the thickness of described wearing layer is 8.0-9.0mm, the material of described wearing layer is alloyed steel, described wearing layer sidewall has through hole, side near described second polyethylene layer in described through hole is provided with moveable piston, opposite side away from described second polyethylene layer in described through hole is provided with sheet metal, described sheet metal is provided with pressure transducer, described pressure transducer electrical connection alarm.

2. PE fuel tube as claimed in claim 1, it is characterized in that, also comprise supporting layer, described supporting layer is filled between described second polyethylene layer and described wearing layer, described supporting layer is braiding wire side column structure, the thickness of described supporting layer is 1.0-1.4mm, and the material of described supporting layer is carbon fiber.

3. PE fuel tube as claimed in claim 2, it is characterized in that, described wearing layer outer wall scribbles polyurethane coating.

4. PE fuel tube as claimed in claim 3, it is characterized in that, the density of described medium density polyethylene is 0.931g/cm ³.

5. PE fuel tube as claimed in claim 4, it is characterized in that, the density of described high density polyethylene (HDPE) is 0.959g/cm ³.

6. PE fuel tube as claimed in claim 5, it is characterized in that, described piston material is rubber.

7. PE fuel tube as claimed in claim 6, it is characterized in that, described piston is cylindrical-shaped structure, the diameter of described piston and the equal diameters of described through hole, and the axial length of described piston is 3.5-4.0mm.

8. PE fuel tube as claimed in claim 7, is characterized in that, described sheet metal and described wearing layer one-body molded.