Metal compensation hose with U-shaped elbow

Abstract

The utility model discloses a metal compensation hose with a U-shaped elbow, which comprises a U-shaped pipe and two corrugated pipes, the peripheries of the corrugated pipes are coated with pipe protecting sleeves, each corrugated pipe is provided with a first end and a second end, the first ends of the two corrugated pipes are respectively connected with the two ends of the U-shaped pipe, and the second ends of the two corrugated pipes are respectively connected with the two ends of the U-shaped pipe. The first ends of the two corrugated pipes are respectively connected with a connector, the second ends of the two corrugated pipes are respectively connected with a bent pipe, and the other end of each bent pipe is provided with a connecting nut used for being connected with a pipeline. In addition, due to the fact that the bent pipe is connected with the home-entry main pipe or the buried pipeline, the phenomenon that the bent pipe is not prone to falling off when the corrugated pipe is directly connected with the home-entry main pipe or the buried pipeline can be avoided, and the bent pipe is not prone to falling off when the corrugated pipe is directly connected with the home-entry main pipe or the buried pipeline. And the connecting end of the corrugated pipe and the home-entry pipeline or the buried pipeline is excessively bent to cause breakage or cracks.

Description

Technical Field

[0001] This utility model relates to the field of natural gas pipeline technology, and in particular to a metal compensating hose with a U-shaped bend. Background Technology

[0002] With the continuous progress of society and technology, household stoves have evolved from burning firewood to using gas, and now gas is directly supplied to homes through gas pipelines. The current gas pipelines are transported in cities through underground pipelines by the natural gas bureau, and then distributed to each household through the main inlet pipe of each building. Since houses are always prone to settlement, the main inlet pipe and the underground pipeline usually need to be connected by a compensating pipe.

[0003] A search revealed a Chinese invention patent (application publication number: CN107906286A) that provides a snap-ring positioning type gas bellows, including a bellows hose made of stainless steel, which is not easily corroded and has a long service life. The bellows hose is covered with a protective sleeve to protect it from damage. The end of the bellows hose is fitted with a connector, which is a copper connector.

[0004] The aforementioned shortcomings of the existing technology are as follows: due to the different spacing between different main inlet pipes and buried pipes, and the susceptibility to building settlement and earthquakes, corrugated pipes with a length greater than the spacing between the main inlet pipes and buried pipes are required for connection. However, although the corrugated pipes can be bent during installation, considerable force is still required to bend them manually before connecting them to the main inlet pipes and buried pipes through joints. This makes the installation process laborious, and the ends of the corrugated pipes connected to the main inlet pipes or buried pipes may crack or even break due to excessive bending. Therefore, it is urgent to improve this shortcoming. Utility Model Content

[0005] The purpose of this invention is to address the above-mentioned problems. This invention provides a metal compensating hose with a U-shaped bend, which has the advantages of preventing the corrugated pipe from cracking and being easier to install.

[0006] To achieve the above objectives, this utility model provides the following technical solution: it includes a U-shaped pipe and two corrugated pipes, each corrugated pipe is covered with a protective sleeve, each corrugated pipe has a first end and a second end, the first ends of the two corrugated pipes are respectively connected to the two ends of the U-shaped pipe, the second ends of the two corrugated pipes are respectively connected to a bend, and the other end of the bend is provided with a connecting nut for connecting to a pipe.

[0007] Preferably, a sleeve is pressed onto the outer periphery of the connection between the corrugated pipe, the U-shaped pipe, and the bend.

[0008] Preferably, the U-shaped tube, the corrugated tube, the sleeve, and the bend are all made of stainless steel.

[0009] Preferably, the protective sleeve is a stainless steel mesh sleeve.

[0010] Preferably, the outer periphery of the protective sleeve is covered with an anti-corrosion coating.

[0011] Preferably, the diameter of the sleeve hole is larger than the outer diameter of the bend and the corrugated pipe.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model provides a metal compensating hose with a U-shaped bend. It is connected to the main inlet pipe or buried pipe joint through the connecting nut on the bend. The U-shaped pipe reduces the step of bending the corrugated pipe during installation, making it easier and less labor-intensive. In addition, the connection between the bend and the main inlet pipe or buried pipe can prevent breakage or cracking caused by excessive bending at the connection end of the corrugated pipe to the main inlet pipe or buried pipe when they are directly connected. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 A magnified structural diagram of A in the diagram.

[0016] Attached diagram descriptions: 1. U-shaped pipe; 21. Corrugated pipe; 22. Protective sleeve; 23. Anti-corrosion coating; 3. Sleeve; 4. Bend; 5. Connecting nut. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figures 1-2As shown, a metal compensating hose with a U-shaped bend includes a U-shaped pipe 1 and two corrugated pipes 21. The corrugated pipes 21 are made of stainless steel, which is not easily corroded and has a long service life. The corrugations on the surface of the corrugated pipes 21 allow the overall structure to expand and contract freely and bend in any direction. When thermal expansion and contraction, geological subsidence, or earthquakes occur, the steel-plastic conversion structure can automatically generate compensation in length and at any angle according to the changes without breaking. The corrugated pipes 21 are all covered with protective sleeves 22, which are used to protect the corrugated pipes 21. The protective sleeves 22 are made of stainless steel mesh to prevent the corrugated pipes 21 from being cut by sharp objects. In case of breakage, each of the corrugated pipes 21 has a first end and a second end. The first ends of the two corrugated pipes 21 are respectively connected to the two ends of the U-shaped pipe 1, and the second ends of the two corrugated pipes 21 are respectively connected to a bend 4. The bend 4 is connected to the main inlet pipe or buried pipe, which can prevent the corrugated pipe 21 from breaking or cracking due to excessive bending at the end connected to the inlet pipe or buried pipe. The bend 4 can be replaced according to different situations. The other end of the bend 4 is provided with a connecting nut 5 for connecting to the pipe. The connecting nut 5 has the advantages of corrosion resistance, easy connection, no rust, and easy thread processing.

[0019] A sleeve 3 is pressed onto the outer periphery of the connection between the corrugated pipe 21 and the U-shaped pipe 1 and the bend 4. The sleeve 3 is pressed onto the outer periphery of the connection between the corrugated pipe 21 and the U-shaped pipe 1 and the bend 4 by oil pressure or hydraulic pressure, so that the connection is more secure.

[0020] The U-shaped pipe 1, the corrugated pipe 21, the sleeve 3 and the bend 4 are all made of stainless steel, thus providing rust and corrosion protection.

[0021] The outer periphery of the protective sleeve 22 is covered with an anti-corrosion coating layer 23, which consists of three layers: an epoxy resin layer, a hot melt adhesive layer, and a cross-linked polyethylene layer, from the inside out. The anti-corrosion coating layer 23 provided at the metal parts and their connections ensures that the structure can be used for a long time.

[0022] The sleeve 3 has a larger diameter than the outer diameter of the bend 4 and the corrugated pipe 21, so it can be better fitted around the outer periphery of the connection between the corrugated pipe 21 and the U-shaped pipe 1 and the bend 4. Then, the sleeve 3 is pressed onto the outer periphery of the connection between the corrugated pipe 21 and the U-shaped pipe 1 and the bend 4 by oil pressure or hydraulic pressure.

[0023] Furthermore, the sleeve 3 connected to the outer periphery of the connection between the U-shaped pipe 1 and the corrugated pipe 21 is further connected to the U-shaped pipe 1 by welding, and the sleeve 3 connected to the outer periphery of the connection between the bend 4 and the corrugated pipe 21 is further connected to the bend 4 by welding, thereby further improving the sealing performance and firmness.

[0024] During installation: By connecting one end of the connecting nut 5 to the joint of the buried pipe, and then connecting the other end of the connecting nut 5 to the joint of the main inlet pipe, the U-shaped pipe 1 reduces the step of bending the corrugated pipe 21 during installation, making it easier and less strenuous. Therefore, only a small force is needed to move the two bends 4 to either side away from each other or to the side closer to each other. The distance between the bends 4 can be adjusted according to the different distances between the main inlet pipe and the buried pipe. Furthermore, by connecting the bends 4 to the main inlet pipe or the buried pipe, it can prevent the corrugated pipe 21 from breaking or cracking due to excessive bending at the connection end with the main inlet pipe or the buried pipe when directly connected to it.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metal compensating hose with a U-shaped elbow, characterized in that: It includes a U-shaped pipe (1) and two corrugated pipes (21). Each corrugated pipe (21) has a first end and a second end. The first ends of the two corrugated pipes (21) are respectively connected to the two ends of the U-shaped pipe (1). The second ends of the two corrugated pipes (21) are respectively connected to a bend (4). The other end of the bend (4) is provided with a connecting nut (5) for connecting with a pipe. A sleeve (3) is pressed on the outer periphery of the connection between the corrugated pipe (21) and the U-shaped pipe (1) and the bend (4). The sleeve (3) is welded to the U-shaped pipe (1) and the bend (4).

2. The metal compensating hose with a U-shaped elbow according to claim 1, characterized in that: The corrugated pipe (21) is covered with a protective sleeve (22) on its outer periphery.

3. The metal compensating hose with a U-shaped elbow according to claim 1, characterized in that: The U-shaped tube (1), the corrugated tube (21), the sleeve (3) and the bend (4) are all made of stainless steel.

4. A metal compensating hose with a U-shaped bend according to claim 2, characterized in that: The protective sleeve (22) is a stainless steel mesh sleeve.

5. A metal compensating hose with a U-shaped elbow according to claim 4, characterized in that: The outer periphery of the protective sleeve (22) is covered with an anti-corrosion coating layer (23).

6. A metal compensating hose with a U-shaped bend according to claim 1, characterized in that: The diameter of the sleeve (3) is larger than the outer diameter of the bend (4) and the bellows (21).

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