KR100874502B1 - Bow-type double layer pipe - Google Patents

Abstract

A bow-type double layer pipe is provided to form a transfer path using double layer pipes easily by being placed at a bent portion of the transfer pipe. A bow-type double layer pipe comprises a casing pipe(110); one or more core pipes(120) which has an external diameter smaller than the inside diameter of the casing pipe, has abrasion resistance, and is bent to have a center angle of less than 90 in order to be inserted into the casing pipe; and synthetic resins(130,140) which are coated onto the outer periphery of the core pipe and the inner periphery of the casing pipe, lubricate the core pipe when inserted into the casing pipe and support the core pipe after inserted into the casing pipe.

Description

Bent-Type Double Pipes {BOW-TYPE DOUBLE LAYER PIPE}

The present invention relates to a bent double tube pipe, and more particularly, to a bent double tube pipe which is connected between double pipe pipes carrying a specific material to be bent.

In general, double pipes are widely used as a conveying means for conveying materials containing abrasive solid materials (eg, concrete), such as finely crushed stones or minerals.

The conventional double tube pipe is composed of a metal core pipe having abrasion resistance, and a metal casing pipe having toughness to protect the core pipe into which the core pipe is inserted and inserted from external impact or the like.

In such a conventional double tube pipe, the core pipe is manufactured to have an outer diameter larger than the inner diameter of the casing pipe and smaller than the outer diameter so that the outer circumferential surface of the core pipe is inserted into the inner circumferential surface of the casing pipe.

The straight double tube pipes produced by such an insertion method are connected to form a transfer path for transporting the abrasive solid material.

At this time, since the desired transfer path cannot be easily configured using the straight double pipe, the double pipe is connected using a bent pipe having a bent shape.

However, conventionally, when constructing a transfer path using a double pipe, it does not require a large number as compared to a straight double pipe, so that a bent pipe is worn by an abrasive solid material by using a bent pipe made of a single pipe. There is a problem.

Accordingly, the present invention has been made to solve the above problems, and an object thereof is to provide a bent double pipe pipe connected to the double pipe pipe for transporting a specific material to bend.

Another object of the present invention is to provide a bent double pipe which can be configured to easily configure the transport path to be formed by using a double pipe.

It is another object of the present invention to provide a bent double pipe which improves durability and wear resistance.

Another object of the present invention is to provide a bent double pipe pipe having a lighter weight.

Another object of the present invention to provide a bent double pipe pipe that can minimize the friction force during material transfer.

It is another object of the present invention to provide a bent double pipe which enables mass production.

In order to achieve the above object, the bent double pipe pipe having a central angle of 90 degrees in accordance with one aspect of the present invention, bent to have a central angle of less than 90 degrees, the outer casing pipe having toughness and the inner diameter of the casing pipe At least one core pipe having a smaller outer diameter, wear resistance, and bent to have a central angle of less than 90 degrees so as to be inserted into the casing pipe, an inner circumferential surface of the casing pipe and an outer circumferential surface of the core pipe When the core pipe is inserted into the casing pipe lubrication and the fixed support action after being inserted into the casing pipe and the core pipe is inserted into the casing pipe, so as to have a central angle of 90 degrees at the central angle of less than 90 degrees, It is connected to both ends of the casing pipe and the core pipe to extend a predetermined length Includes first and second additional pipes, wherein the tolerance between the inner circumferential surface of the casing pipe and the outer circumferential surface of the core pipe is the thickness of the synthetic resin applied to the inner circumferential surface of the casing pipe and the thickness of the synthetic resin applied to the outer circumferential surface of the core pipe. It is formed smaller than the sum, the first and second additional pipes are each formed of an additional casing pipe formed of a tough metal material, a metal material having a wear resistance, and has an outer diameter smaller than the inner diameter of the additional casing pipe, At least one additional core pipe inserted inside the additional casing pipe, and applied to the inner circumferential surface of the additional casing pipe and the outer circumferential surface of the additional core pipe so as to be lubricated and inserted when the additional core pipe is inserted into the additional casing pipe. And a synthetic resin having a fixed support function after the A longitudinal cross-section is longitudinally engaged between the additional core pipe and the core pipe inside the additional casing pipe and is connected by welding.
According to another aspect of the present invention, a bent double pipe pipe having a central angle of 90 degrees is bent to have a central angle of less than 90 degrees, has an outer casing pipe having toughness, an outer diameter smaller than the inner diameter of the casing pipe, and has abrasion resistance. And at least one core pipe bent to have a center angle of less than 90 degrees so as to be inserted inside the casing pipe, and to the inner circumferential surface of the casing pipe and the outer circumferential surface of the core pipe, wherein the core pipe is applied to the casing pipe. Synthetic resins which lubricate when inserted into the tube and have a fixed support function after being inserted into the casing pipe, and additional pipes extending a predetermined length to have a central angle of 90 degrees from a central angle of less than 90 degrees after the core pipe is inserted into the casing pipe. A hole between the inner circumferential surface of the casing pipe and the outer circumferential surface of the core pipe. Is less than the sum of the thickness of the synthetic resin applied to the inner peripheral surface of the casing pipe and the thickness of the synthetic resin applied to the outer peripheral surface of the core pipe, the additional pipe is an additional casing pipe formed of a tough metal material and wear resistance It is formed of a metal material having an outer diameter smaller than the inner diameter of the additional casing pipe, and applied to at least one additional core pipe inserted into the additional casing pipe, the inner peripheral surface of the additional casing pipe and the outer peripheral surface of the additional core pipe. And a synthetic resin that lubricates and is fixedly supported after being inserted when the additional core pipe is inserted into the additional casing pipe, wherein a longitudinal section in the longitudinal direction between the additional core pipe and the core pipe is provided inside the additional casing pipe. Interlocking and connecting by welding It is characterized by.

delete

In the bent double pipe according to the present invention, the core pipe bent inside the bent casing pipe is formed by forming the outer diameter of the core pipe smaller than the inner diameter of the casing pipe and applying synthetic resin to the inner circumferential surface of the casing pipe and the outer circumferential surface of the core pipe. When inserted, it can be easily inserted to allow for easier insertion, to prevent damage and noise during insertion, and to absorb shocks as a cushion of synthetic resin to extend the life of the bent double pipe. .

In addition, bent double pipe pipes bent to have a center angle of less than 90 degrees that can be conformally inserted when fabricating a bent double pipe pipe that is bent to have a 90 degree center angle where the bent core pipe is not conformally inserted inside the bent casing pipe. After manufacturing, there is an effect that can be easily produced by additionally connecting additional double pipe to have a central angle of 90 degrees.

In addition, there is an effect that can improve the durability and wear resistance of the bent double pipe.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a perspective view of a bent double pipe according to an embodiment of the present invention.

As shown in FIG. 1, the bent double pipe 100 may include an outer casing pipe 110 that is bent to have a central angle of a predetermined angle, and a central angle of at least one predetermined angle that is inserted into the casing pipe 110. It is composed of a core pipe 120 bent to have. The core pipe 120 is formed of a metal material having wear resistance, and the casing pipe 110 is formed of a metal material having toughness to protect the core pipe 120 from external impact.

The inner diameter of the casing pipe 110 is larger than the outer diameter of the core pipe 120.

That is, it is not necessary to insert the core pipe 120 into the casing pipe 110 in an interference fit manner. In this case, in order to fix the core pipe 120 inside the casing pipe 110, the bent double pipe 100 is a synthetic resin 130 applied to the inner circumferential surface of the casing pipe 110 and the outer circumferential surface of the core pipe 120, respectively. And 140).

Synthetic resin (130, 140) is lubricated when the core pipe 120 is inserted into the inner surface of the casing pipe 110, so that it can be inserted into compliance can be inserted very easily compared to the interference fit method. To increase the degree of adhesion between the casing pipe and the core pipes 110 and 120, the core pipe 120 is fixedly supported inside the casing pipe 110.

In addition, the synthetic resins 130 and 140 may reduce noise when the core pipe 120 is inserted into the inner surface of the casing pipe 110, and reduce friction between the casing pipe 110 and the core pipe 120 and absorb shocks. It can act as a cushion to extend the life of the pipe.

The tolerance between the inner circumferential surface of the casing pipe 110 and the inner circumferential surface of the core pipe 120 is the thickness of the synthetic resin 130 applied to the inner circumferential surface of the casing pipe 110 and that of the synthetic resin 140 applied to the outer circumferential surface of the core pipe 120. It may be less than the sum of the thickness, in this case it is possible to use the elasticity of the synthetic resin (130, 140) to make the fixed support of the core pipe 120 inside the casing pipe (110) stronger.

The synthetic resins 130 and 140 may be urethane resins, or may be manufactured by mixing additives such as thinner with the urethane resin.

The bent double pipe 100 may be connected to the longitudinal cross-section in the longitudinal direction with the straight double pipe can be connected by welding to form a transport path integrally.

On the other hand, the predetermined center angle is 90 degrees or less, preferably bent double pipe pipe having a center angle of 10 degrees, 15 degrees, 20 degrees, 45 degrees and 90 degrees can be connected between the double pipe pipe to form a variety of transport paths Make sure Here, when manufacturing the bent double pipe pipe 100 having a center angle of 10 degrees, 15 degrees, 20 degrees and 45 degrees, the core pipe using synthetic resins 130 and 140 in a casing pipe 110 having a corresponding center angle to be manufactured. Produced by inserting 120.

2 is a cross-sectional view of a bent double pipe having a center angle of 45 degrees in accordance with an embodiment of the present invention.

As shown in FIG. 2, the bent double pipe pipe 100 bent to have a center angle of 45 degrees is different from only the center angle of FIG. 1 as described above, and the same casing pipe 110, the core pipe 120, The bent core pipe 120 bent to have a 45 degree center angle is inserted into the bent casing pipe 110 that is bent to have a 45 degree center angle, including the synthetic resins 130 and 140. Detailed description thereof is as described above, and will be omitted below.

However, the bent double pipe pipe 300 is bent to have a 90-degree center angle is manufactured in a different process from the above, and will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view of the bent double pipe pipe bent to have a 90 degree center angle according to another embodiment of the present invention.

As shown in FIG. 3, it is not easy to insert a core pipe bent at 90 degrees into a casing pipe bent at 90 degrees to produce a bent double pipe pipe 300 bent to have a 90 degree center angle.

Accordingly, the bent double pipe pipe 300 bent to have a center angle of 90 degrees includes an outer casing pipe 210 and a casing pipe 210 that are bent to have a predetermined center angle smaller than 90 degrees (for example, 60 degrees). The core pipe 220 bent to have a predetermined center angle (eg, 30 degrees) smaller than at least one 90 degree inserted therein, and the core pipe 220 inserted into the casing pipe 210 and then smaller than 90 degrees. It comprises an additional pipe 230 extending a certain length to have a 90 degree center angle from the center angle.

In addition, the synthetic resin 240 is applied to the inner circumferential surface of the casing pipe 210 and the outer circumferential surface of the core pipe 220 so that the core pipe 220 is lubricated when the core pipe 220 is inserted into the casing pipe 210 and has a fixed support function after the core pipe 220 is inserted into the casing pipe 210. , 250) may be further included.

The additional pipe 230 is an additional casing pipe 231 formed of a tough metal material, and the additional casing pipe 231 is formed of a metal material having a wear resistance, has an outer diameter smaller than the inner diameter of the additional casing pipe 231, It is applied to at least one additional core pipe 232 inserted therein and to the inner circumferential surface of the additional casing pipe 231 and the outer circumferential surface of the additional core pipe 232, so that the additional core pipe 232 is connected to the additional casing pipe 231. It is configured to include a synthetic resin (233, 234) for lubrication when inserted and fixed support after inserted.
Such additional pipes may, of course, constitute a bent double pipe pipe that is connected to both ends of the casing pipe 210 and the core pipe 220 as well as bent to have a 90 degree center angle.

The additional pipe 230 may then be straight, or curved, or some may be straight and some may be curved.

By bending the longitudinal cross-section between the additional core pipe 232 and the core pipe 220 in the longitudinal direction inside the additional casing pipe 231, the bent double pipe pipe 200 having a central angle smaller than 90 degrees with the additional pipe 23. ) Can be easily connected to the bent double pipe 300 having a 90 degree.

In the above, specific preferred embodiments of the present invention have been illustrated and described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made by those skilled in the art without departing from the gist of the present invention attached to the claims. .

1 is a perspective view of a bent double pipe pipe according to an embodiment of the present invention.

Figure 2 is a cross-sectional view of the bent double pipe pipe bent to have a 45 degree center angle in accordance with an embodiment of the present invention.

3 is a cross-sectional view of a bent double pipe pipe bent to have a 90 degree center angle in accordance with another embodiment of the present invention.

Claims (14)

An outer casing pipe bent to have a central angle of less than 90 degrees and having toughness; At least one core pipe having an outer diameter smaller than the inner diameter of the casing pipe, having a wear resistance, and bent to have a central angle of less than 90 degrees so as to be inserted into the casing pipe; A synthetic resin applied to an inner circumferential surface of the casing pipe and an outer circumferential surface of the core pipe, and having a lubricating action when the core pipe is inserted into the casing pipe and a fixed supporting function after being inserted; And After the core pipe is inserted into the casing pipe, the first and second additional pipes connected to both ends of the casing pipe and the core pipe to extend a predetermined length so as to have a center angle of 90 degrees at a center angle of less than 90 degrees. Including, The tolerance between the inner circumferential surface of the casing pipe and the outer circumferential surface of the core pipe is smaller than the sum of the thickness of the synthetic resin applied to the inner circumferential surface of the casing pipe and the thickness of the synthetic resin applied to the outer circumferential surface of the core pipe. The first and second additional pipes, respectively, An additional casing pipe formed of a tough metal material; At least one additional core pipe formed of a metal material having wear resistance and having an outer diameter smaller than that of the additional casing pipe and inserted into the additional casing pipe; A synthetic resin applied to an inner circumferential surface of the additional casing pipe and an outer circumferential surface of the additional core pipe to lubricate and fix and support the inserted core pipe when inserted into the additional casing pipe, 11. A bent double pipe having a central angle of 90 degrees, wherein a longitudinal cross section is engaged between the additional core pipe and the core pipe in a longitudinal direction inside the additional casing pipe and connected by welding. delete delete delete The method of claim 1, wherein the synthetic resin, A bent double tube pipe having a 90 degree center angle, comprising urethane resin. delete According to claim 1, The bent double pipe is, A bent double tube pipe having a 90 degree center angle, characterized in that the longitudinal cross-section is engaged with the straight double tube pipe in a longitudinal direction and connected by welding to form a conveying path integrally. An outer casing pipe bent to have a central angle of less than 90 degrees and having toughness; At least one core pipe having an outer diameter smaller than the inner diameter of the casing pipe, having a wear resistance, and bent to have a central angle of less than 90 degrees so as to be inserted into the casing pipe; A synthetic resin applied to an inner circumferential surface of the casing pipe and an outer circumferential surface of the core pipe, and having a lubricating action when the core pipe is inserted into the casing pipe and a fixed supporting function after being inserted; And After the core pipe is inserted into the casing pipe, including a further pipe extending a predetermined length to have a central angle of 90 degrees from the central angle of less than 90 degrees The tolerance between the inner circumferential surface of the casing pipe and the outer circumferential surface of the core pipe is smaller than the sum of the thickness of the synthetic resin applied to the inner circumferential surface of the casing pipe and the thickness of the synthetic resin applied to the outer circumferential surface of the core pipe. The additional pipe, An additional casing pipe formed of a tough metal material; At least one additional core pipe formed of a metal material having wear resistance and having an outer diameter smaller than that of the additional casing pipe and inserted into the additional casing pipe; A synthetic resin applied to an inner circumferential surface of the additional casing pipe and an outer circumferential surface of the additional core pipe to lubricate and fix and support the inserted core pipe when inserted into the additional casing pipe, A bent double pipe having a 90-degree center angle, characterized in that a longitudinal cross section is longitudinally engaged between the additional core pipe and the core pipe inside the additional casing pipe to be welded. delete The method of claim 8, wherein the additional pipe, A bent double tube pipe having a 90 degree center angle, characterized in that the longitudinal cross-section is engaged with the straight double tube pipe in a longitudinal direction and connected by welding to form a conveying path integrally. delete According to claim 8, The bent double pipe is, A bent double tube pipe having a 90 degree center angle, characterized in that the longitudinal double end pipe is longitudinally engaged with the straight double tube pipe to form a conveying path by welding. delete The method of claim 8, wherein the synthetic resin, A bent double tube pipe having a 90 degree center angle, comprising urethane resin.

Images