A PE pipe that resists low-temperature embrittlement

Abstract

The utility model provides a PE pipe for preventing low-temperature embrittlement, comprising an outer pipe, a reinforcing net and an inner pipe, wherein the inner part of the outer pipe is fixed with a reinforcing net by embedding, and the middle part of the outer pipe is fixed with the inner pipe by threaded engagement; the outer pipe comprises a first pipe body and an inner thread, wherein the inner thread is provided with a plurality of sections, and the inner thread is fixed on the inner wall of the first pipe body. The provision of the reinforcing net and the inner pipe of the utility model can reduce the stress concentration phenomenon of the utility model at low temperature when in use, thereby improving its anti-embrittlement ability, and improving the compressive resistance and anti-deformation ability of the utility model.

Description

Technical Field

[0001] The utility model belongs to the technical field of PE pipes, and in particular relates to a PE pipe that is resistant to low-temperature embrittlement. Background Art

[0002] PE pipe is a pipe material used to transport liquids, gases or solids, and its full name is polyethylene pipe. With its excellent corrosion resistance, wear resistance, and aging resistance, it has been widely used in water supply, gas, drainage, chemical industry, metallurgy, and agriculture. However, with the diversification of the application environment of pipeline engineering, especially under low temperature conditions, the application of PE pipe faces many challenges.

[0003] First of all, due to the physical properties of existing PE pipes, the movement of their molecular chains is restricted at low temperatures, causing the material to become brittle and hard, and its impact resistance decreases. This embrittlement phenomenon not only affects the normal use of the pipeline, but may also cause safety hazards.

[0004] Secondly, the cross-section of the existing PE pipe guide cavity is mostly circular in design. Under low temperature conditions, the stress distribution of the circular cross-section pipe in certain areas (such as bends or connection points) is not uniform. This uneven stress distribution can easily lead to stress concentration in these areas of the pipe, thereby increasing the risk of pipe embrittlement.

[0005] In addition, existing PE pipes often lack sufficient reinforcement elements in their structural design, which makes the pipes prone to deformation or rupture when subjected to external pressure or internal fluid pressure. Especially in low temperature environments, the risk of deformation and rupture is further increased due to the embrittlement of the material itself.

[0006] Therefore, it is very necessary to invent a PE pipe that can resist low-temperature embrittlement. Utility Model Content

[0007] The utility model aims to provide a PE pipe that can prevent low-temperature embrittlement and solve the problems mentioned in the background technology.

[0008] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0009] The utility model discloses a PE pipe for preventing low-temperature embrittlement, comprising an outer pipe, a reinforcing net and an inner pipe, wherein the inner part of the outer pipe is fixed with the reinforcing net by embedding, and the middle part of the outer pipe is fixed with the inner pipe by thread engagement; the outer pipe comprises a first pipe body and an internal thread, wherein the internal thread is provided with a plurality of sections, and the internal thread is all fixed on the inner wall of the first pipe body.

[0010] Furthermore, the inner tube includes a second tube body, an external thread, mineral wool and a material guide cavity. The outer side surface of the second tube body is fixed with several sections of the external thread, wherein the external thread is meshed with the corresponding internal thread; the outer side surface of the second tube body is evenly fixed with several sections of the mineral wool, and the interior of the second tube body is penetrated by a material guide cavity, and the cross-section of the material guide cavity is elliptical. Such a setting can reduce the stress concentration phenomenon of the second tube body at low temperature, thereby improving its anti-embrittlement ability, and a detachable structure is adopted to facilitate maintenance.

[0011] Furthermore, the reinforcing net is a mesh structure woven from metal wires, and the grid structure inside the reinforcing net is compact and evenly distributed. Such a configuration can significantly improve the compression resistance and deformation resistance of the first tube body.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The provision of the reinforcing net of the utility model can significantly improve the compression resistance and deformation resistance of the first tube body during use, thereby extending the service life of the first tube body, and effectively disperse stress, thereby reducing the possibility of deformation and embrittlement of the first tube body under low temperature conditions.

[0014] 2. The arrangement of the inner tube of the utility model allows the mineral wool to play a role in heat preservation during use, thereby effectively preventing the embrittlement of the second tube body in a low temperature environment. Moreover, after long-term use, the inner tube can be rotated to disengage the outer thread from the inner thread, thereby taking the inner tube out from the outer tube. At this time, the mineral wool can be replaced. At the same time, because the cross-section of the material guide cavity is elliptical, the elliptical shape can reduce the stress concentration of the second tube body at low temperatures compared to the traditional circular shape, thereby improving its anti-embrittlement ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the reinforcing net of the utility model.

[0018] Figure 3 It is a structural schematic diagram of the outer tube of the utility model.

[0019] Figure 4 It is a structural schematic diagram of the inner tube of the utility model.

[0020] In the figure:

[0021] 1-outer tube, 11-first tube body, 12-inner thread, 2-reinforcement mesh, 3-inner tube, 31-second tube body, 32-outer thread, 33-mineral wool, 34-material guide cavity. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "all around" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limitations on the present invention.

[0024] See also Figures 1 to 3 As shown, the utility model is a PE pipe for preventing low-temperature embrittlement, comprising an outer pipe 1, a reinforcing net 2 and an inner pipe 3, wherein the inner part of the outer pipe 1 is fixed with the reinforcing net 2 by embedding, and the middle part of the outer pipe 1 is fixed with the inner pipe 3 by threaded engagement; the outer pipe 1 comprises a first pipe body 11 and an internal thread 12, wherein the internal thread 12 is provided with a plurality of sections, and the internal thread 12 is all fixed on the inner wall of the first pipe body 11.

[0025] like Figure 4The inner tube 3 comprises a second tube body 31, an external thread 32, mineral wool 33 and a material guide cavity 34. A plurality of sections of external threads 32 are fixed on the outer side surface of the second tube body 31, wherein the external threads 32 are meshed with the corresponding internal threads 12; a plurality of mineral wool 33 are evenly fixed on the outer side surface of the second tube body 31, and a material guide cavity 34 is provided through the interior of the second tube body 31, and the cross-section of the material guide cavity 34 is elliptical. When in use, the mineral wool 33 can play a role in heat preservation, thereby effectively preventing the embrittlement of the second tube body 31 in a low temperature environment, and, after long-term use, the outer thread 32 can be disengaged from the internal thread 12 by rotating the inner tube 3, so that the inner tube 3 can be taken out from the inner tube 1, and the mineral wool 33 can be replaced at this time. At the same time, because the cross-section of the material guide cavity 34 is elliptical, the elliptical shape can reduce the stress concentration phenomenon of the second tube body 31 at low temperatures compared with the traditional circular shape, thereby improving its anti-embrittlement ability.

[0026] Specifically, the reinforcing net 2 is a mesh structure woven from metal wires, and the grid structure inside the reinforcing net 2 is tight and evenly distributed. When in use, it can significantly improve the compression resistance and deformation resistance of the first tube body 11, thereby extending the service life of the first tube body 11, and effectively disperse stress, thereby reducing the possibility of deformation and embrittlement of the first tube body 11 under low temperature conditions.

[0027] Specifically, the first tube body 11 and the second tube body 31 are both made of polyethylene.

[0028] See also Figure 1-4 As shown, the utility model is a PE pipe that prevents low-temperature embrittlement, and its working principle is: when in use, the material is transported through the material guide cavity 34. When the utility model is in a low-temperature environment, the mineral wool 33 plays its heat preservation role, maintains the stability of the internal temperature of the second tube body 31, and reduces the risk of embrittlement caused by low temperature. At the same time, the reinforcing net 2 disperses stress to improve the pressure resistance and deformation resistance of the first tube body 11, thereby ensuring the stable operation of the utility model at low temperatures. In addition, after the utility model has been used for a long time, if the mineral wool 33 needs to be replaced, it is only necessary to rotate the inner tube 3 to disengage the outer thread 32 from the inner thread 12, and the inner tube 3 can be easily taken out for replacement, thereby reducing maintenance costs.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A PE pipe for preventing low temperature embrittlement, comprising an outer pipe (1), a reinforcing net (2) and an inner pipe (3), characterized in that: A reinforcing net (2) is fixed inside the outer tube (1), and an inner tube (3) is fixed to the middle of the outer tube (1) by threaded engagement; the outer tube (1) comprises a first tube body (11) and an internal thread (12), wherein the internal thread (12) is provided with a plurality of sections, and the internal thread (12) is fixed to the inner wall of the first tube body (11).

2. A low-temperature embrittlement-resistant PE pipe according to claim 1, characterized in that: The inner tube (3) comprises a second tube body (31), an external thread (32), mineral wool (33) and a material guide cavity (34); a plurality of sections of the external thread (32) are fixed to the outer side surface of the second tube body (31), wherein the external thread (32) is meshed with the corresponding internal thread (12); a plurality of the mineral wool (33) are evenly fixed to the outer side surface of the second tube body (31), and a material guide cavity (34) is provided through the interior of the second tube body (31), wherein the cross-section of the material guide cavity (34) is elliptical.

3. A PE pipe for preventing low temperature embrittlement as claimed in claim 1, characterized in that: The reinforcing net (2) is a mesh structure woven from metal wires, and the mesh structure inside the reinforcing net (2) is compact and evenly distributed.

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