CN214500441U

CN214500441U - Novel reinforced double-layer straight pipe

Info

Publication number: CN214500441U
Application number: CN202120741693.5U
Authority: CN
Inventors: 马再兴; 刘志丰; 彭柱
Original assignee: Changsha Tonghui New Material Co ltd
Current assignee: Changsha Tonghui New Material Co ltd
Priority date: 2021-04-12
Filing date: 2021-04-12
Publication date: 2021-10-26
Anticipated expiration: 2031-04-12

Abstract

The utility model discloses a new strenghthened type double-deck straight tube, including straight tube and first flange to and locate the first wear-resisting cover of straight tube entry end and the wear-resisting cover of second of locating the straight tube exit end, first wear-resisting sheathe in is equipped with first flange, is equipped with toper cover and toper outer tube between straight tube entry end and the first wear-resisting cover, and the pipe diameter that the toper emboliaed the mouth end equals rather than the pipe diameter of exit end and the wall thickness A1 that the toper emboliaed the mouth end is greater than the wall thickness A2 of its exit end, and the straight tube includes straight tube outer tube and straight tube inner tube, and the toper embolias the mouth end and is connected with first wear-resisting cover, and toper cover exit end and straight tube internal connection, toper outer tube and straight tube outer tube integrated into one piece, toper outer tube laminating cover on the toper sheathe tip and the toper outer tube and first flange fixed connection. The utility model discloses a with toper outer tube and straight tube outer tube integrated into one piece in order to avoid welding annealing, set up the impact of a toper cover buffering fluid simultaneously in toper outer tube inboard to effectively prolong the life of straight tube.

Description

Novel reinforced double-layer straight pipe

Technical Field

The utility model relates to the technical field of pipeline, especially, relate to a new double-deck straight tube of strenghthened type.

Background

The pipeline transportation is widely applied to various industries, such as the industries of buildings, petroleum, mines, coal and the like. The straight pipe section is the most important component in the pipeline conveying system. The existing straight pipe conveying pipeline can be generally divided into a single-layer pipe and a double-layer pipe, and the materials of the existing straight pipe conveying pipeline generally comprise cast iron, alloy steel, carbon steel, nonferrous metal, plastics and the like. The existing powder conveying pipeline system generally comprises a bent pipe, a straight pipe or a bent straight pipe, when powder conveyed by the existing powder conveying pipeline system flows in the pipeline, such as concrete, tailings, coal ash, grain and the like, the flow direction of the powder can be suddenly changed when the powder passes through a turning position, meanwhile, the pipeline generally has larger pressure, and the powder can flow close to one side in the pipeline under the action of centrifugal force, so the whole pipeline system has serious eccentric wear, a first straight pipe connected with the bent pipe has serious eccentric wear because the flow direction of the powder is not stable, so the inlet end also has serious eccentric wear, in order to solve the problem, the existing method generally adds an alloy wear-resistant sleeve with higher wear resistance at the inlet end of the straight pipe, the method can prolong the service life of the straight pipe to a certain extent, but because the length of the alloy wear-resistant sleeve is generally shorter (40-50 mm), and the eccentric wear direction is not specially considered, therefore, the alloy sleeve is worn through prematurely in a certain direction or the straight pipe immediately behind the alloy wear-resistant sleeve is worn through prematurely, so that the overall service life of the pipeline system is shortened, and material waste is caused; in another method, the wear-resistant sleeve is lengthened on the basis of the first method, and the outer pipe of the wear-resistant sleeve is welded on the outer layer of the straight pipe, but due to the material and the wall thickness of the straight pipe, the annealing phenomenon of the inner pipe of the straight pipe is easily caused by the welding operation, so that the whole service life of the pipeline system is further shortened; the third solution is to turn the straight pipe around to install when the straight pipe is worn to a certain degree, which can improve the service life, but brings great difficulty to use and maintenance, and the straight pipe is scrapped too early due to forgetting to turn around or too late turning around, which causes great economic loss and safe use risk for users.

Therefore, how to effectively prolong the service life of the straight pipe and reduce the safety production risk caused by pipe explosion is a difficult problem in the industry at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming and not enough among the prior art, providing a double-deck straight tube of new strenghthened type, its life that can improve the straight tube with lower cost.

In order to solve the technical problem, the utility model provides a new strenghthened type double-deck straight tube, including the straight tube to and locate the first wear-resisting cover of straight tube entry end and the wear-resisting cover of second of locating the straight tube exit end, first wear-resisting sheathe in is equipped with first flange, is equipped with taper sleeve and toper outer tube between straight tube entry end and the first wear-resisting cover, and the pipe diameter that the toper emboliaed the mouth end equals rather than the pipe diameter of exit end and the wall thickness A1 that the toper emboliaed the mouth end is greater than the wall thickness A2 of its exit end, and the straight tube includes straight tube outer tube and straight tube inner tube, and the toper embolias the mouth end and is connected with first wear-resisting cover, and toper cover exit end and straight tube inner tube connected, toper outer tube and straight tube outer tube integrated into one piece, toper outer tube laminating cover is sheathe tip and the first flange fixed connection of toper outer tube on the taper sleeve.

Preferably, the first and second wear sleeves are of equal axial length.

Preferably, the axial length L1 of the tapered sleeve is greater than the axial length L2 of the first wear sleeve.

Preferably, the axial length L1 of the conical sleeve is more than or equal to 80 mm.

Preferably, the tapered outer pipe is fixed to the first flange by welding.

Preferably, the material of the conical sleeve is one or more of high-chromium cast iron, medium-chromium cast iron, low-chromium cast iron, alloy steel, ceramic, hard alloy and high polymer.

Preferably, the material of the straight pipe outer pipe is low-carbon steel, and the material of the straight pipe inner pipe is formed by compounding alloy steel, cast iron, ceramic and a high-molecular wear-resistant material.

Preferably, the materials of the first wear-resistant sleeve and the second wear-resistant sleeve are one or two of low-carbon steel and low-alloy steel.

Compared with the prior art, the utility model discloses beneficial technological effect as follows:

the utility model discloses a taper sleeve and toper outer tube have been designed to the first wear-resisting cover outlet end that meets with the return bend to with toper outer tube and straight tube outer tube design as integrated into one piece, the taper sleeve can effectively cushion the impact of the non-steady fluid in return bend rear side, and toper outer tube and straight tube outer tube relate to and can avoid producing the annealing because of welded connection for integrated into one piece, consequently effectively prolonged the life of straight tube. The utility model discloses better realization its invention purpose, can effectively cushion the impact of fluid to the straight tube after flowing through the return bend through wear-resisting cover and toper cover, according to the fluid to the wearing and tearing law of straight tube with the toper embolia mouth end wall thickness thickening, the wearability in the easy wearing and tearing region has been guaranteed to the at utmost to reach reduce cost and improve straight tube life's purpose, and easily realize mass production, its quality and security are higher.

Drawings

FIG. 1 is a schematic view of a new reinforced double-layer straight pipe of the present invention,

fig. 2 is an installation schematic diagram of a new reinforced double-layer straight pipe of the present invention.

In the figure, 1, a first wear-resistant pipe, 2, a second wear-resistant pipe, 3, a straight pipe, 31, an outer straight pipe, 32, an inner straight pipe, 4, a conical sleeve, 5, a conical outer pipe, 6, a first flange, 7, a second flange and 8, a bent pipe are arranged.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

In the present embodiment, the "first" and "second" merely indicate different components, and are not in order, and taking fig. 1 as an example, the fluid in the straight pipe 3 flows from left to right.

As shown in fig. 1 and 2, a new reinforced double-layer straight pipe comprises a straight pipe 3, a first wear-resistant sleeve 1 arranged at the inlet end of the straight pipe 3 and a second wear-resistant sleeve 2 arranged at the outlet end of the straight pipe 3, wherein a first flange 6 is sleeved on the first wear-resistant sleeve 1, a conical sleeve 4 and a conical outer pipe 5 are arranged between the inlet end of the straight pipe 3 and the first wear-resistant sleeve 1, the pipe diameter of the inlet end of the conical sleeve 4 is equal to the pipe diameter of the outlet end of the conical sleeve, and the wall thickness A1 of the inlet end of the conical sleeve 4 is larger than the wall thickness A2 of the outlet end of the conical sleeve, the straight pipe 3 comprises a straight pipe outer pipe 31 and a straight pipe inner pipe 32, the inlet end of the conical sleeve 4 is connected with the first wear-resistant sleeve 1, the outlet end of the conical sleeve 4 is connected with the inner pipe 32, the conical outer pipe 5 and the straight pipe 31 are integrally formed, and the conical outer pipe 5 is fitted on the conical sleeve 4 and the end of the conical outer pipe 5 is fixedly connected with the first flange 6.

In this embodiment, the second flange 7 is sleeved on the second wear-resistant sleeve 2, the second wear-resistant sleeve 2 can be connected with the rear-side pipeline through the second flange 7, and the first wear-resistant sleeve 1 is connected with the elbow pipe 8 through the first flange 6. When the fluid flows to first wear-resisting cover 1 from return bend 8, because the axial length of first wear-resisting cover 1 is fixed, therefore the flow state behind the fluid flow first wear-resisting cover 1 still is non-steady, it is still great to the impact of pipeline, at this moment, in 4 buffering the fluid of non-steady flow state reentrant straight tube 3 through the taper sleeve of wall thickness A1, can effectively prolong the life of straight tube 3, and simultaneously, the wall thickness A1 of 4 entry ends of taper sleeve is greater than the wall thickness A2 of its exit end, the wear resistance of taper sleeve 4 has effectively been guaranteed, therefore, overall structure's life has just also been guaranteed, thereby the change frequency of straight tube 3 has been reduced, and the cost is saved. Simultaneously, design toper outer tube 5 and straight tube outer tube 31 as integrated into one piece, solved among the prior art toper outer tube 5 and straight tube outer tube 31 because of the welding annealing lead to the defect that its life reduces, and integrated into one piece's design can also reduce cost to a certain extent to improve the productivity effect.

As shown in fig. 1 and 2, the first wear-resistant sleeve 1 and the second wear-resistant sleeve 2 have equal axial lengths. In this embodiment, the axial length of the first wear-resistant sleeve 1 is equal to that of the second wear-resistant sleeve 2, so that only one specification of wear-resistant sleeves is needed in a new reinforced double-layer straight pipe, the purchase or production cost is reduced, and the standardization and normalization generation are guaranteed.

As shown in figures 1 and 2, the axial length L1 of the conical sleeve 4 is greater than the axial length L2 of the first wear-resistant sleeve 1, and the axial length L1 of the conical sleeve 4 is greater than or equal to 80 mm. In this embodiment, in order to ensure that the flow state of the fluid entering the straight pipe 3 is a steady state, the axial length L1 of the tapered sleeve 4 is set to be greater than the axial length L2 of the first wear-resistant sleeve 1, the axial length L1 of the tapered sleeve 4 should be greater than or equal to 80mm according to the actual flow state data of the fluid, and in this embodiment, the axial length L1 of the tapered sleeve 4 is equal to 120 mm.

Wherein, the conical outer tube 5 is welded and fixed with the first wear-resistant sleeve 1. In order to ensure the integrity and the strength of the straight pipe structure, the conical outer pipe 5 is fixedly welded with the first wear-resistant sleeve 1.

In this embodiment, in order to ensure safe transportation and service life of the straight pipe 3 to the greatest extent, the material of the conical sleeve 4 is selected from one or more of high-chromium cast iron, medium-chromium cast iron, low-chromium cast iron, alloy steel, ceramic, hard alloy, and polymer. The straight tube outer tube 31 is made of low-carbon steel, and the straight tube inner tube 32 is made of alloy steel, cast iron, ceramic and high-molecular wear-resistant material in a composite mode. The first wear-resistant sleeve 1 and the second wear-resistant sleeve 2 are made of one or two of low-carbon steel and low-alloy steel.

It is right above the utility model provides a new strenghthened type double-deck straight tube has carried out the detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A new reinforced double-layer straight pipe is characterized by comprising a straight pipe (3), a first wear-resistant sleeve (1) arranged at the inlet end of the straight pipe (3) and a second wear-resistant sleeve (2) arranged at the outlet end of the straight pipe (3), wherein a first flange (6) is sleeved on the first wear-resistant sleeve (1), a conical sleeve (4) and a conical outer pipe (5) are arranged between the inlet end of the straight pipe (3) and the first wear-resistant sleeve (1), the pipe diameter of the inlet end of the conical sleeve (4) is equal to that of the outlet end of the conical sleeve, the wall thickness A1 of the inlet end of the conical sleeve (4) is larger than that A2 of the outlet end of the conical sleeve, the straight pipe (3) comprises a straight pipe outer pipe (31) and a straight pipe inner pipe (32), the inlet end of the conical sleeve (4) is connected with the first wear-resistant sleeve (1), the outlet end of the conical sleeve (4) is connected with the straight pipe inner pipe (32), the conical outer pipe (5) and the straight pipe outer pipe (31) are integrally formed, the conical outer pipe (5) is fitted and sleeved on the conical sleeve (4), and the end part of the conical outer pipe (5) is fixedly connected with the first flange (6).

2. A new reinforced double straight pipe according to claim 1, characterized in that the axial length of said first (1) and second (2) wear sleeves is equal.

3. A new reinforced double straight pipe according to claim 2, characterized in that the axial length L1 of the conical sleeve (4) is greater than the axial length L2 of the first wear sleeve (1).

4. A new reinforced double layer straight pipe according to claim 3, wherein the axial length L1 of said conical sleeve (4) is 80mm or more.

5. A new reinforced double straight pipe according to claim 4, wherein said tapered outer pipe (5) is welded to said first flange (6).

6. A new reinforced double layer straight pipe according to claim 5, wherein the material of said conical sleeve (4) is one or more of high chromium cast iron, medium chromium cast iron, low chromium cast iron, alloy steel, ceramic, hard alloy, and polymer.

7. A new reinforced double-layer straight pipe according to claim 6, wherein the material of the outer straight pipe (31) is low carbon steel, and the material of the inner straight pipe (32) is a composite of alloy steel, cast iron, ceramic and high polymer wear-resistant material.

8. A novel reinforced double-layer straight pipe as claimed in claim 7, wherein the materials of the first wear-resistant sleeve (1) and the second wear-resistant sleeve (2) are one or two of low-carbon steel and low-alloy steel.