Polyurethane thermal insulation pipe connecting elbow convenient to connect

Abstract

The utility model provides a polyurethane thermal insulation pipe connecting elbow convenient to connect, which comprises a bending part and a straight pipe connecting part, a soft adjustable elbow and a hard adjustable elbow which is arranged on the outer side of the soft adjustable elbow and is used for protecting the soft adjustable elbow are connected between the two first connecting circular rings; the straight pipe connecting part comprises straight pipe assemblies arranged at the two ends of the bent part, one end of each straight pipe assembly is connected with the first connecting ring, and the other end of each straight pipe assembly is connected with a connecting assembly used for being connected with a polyurethane heat preservation pipe. The connecting elbow is easy to install and convenient to connect, the connecting angle of the connecting elbow can be changed according to the actual situation, meanwhile, heat loss of a conveying medium can be avoided, the pipeline construction efficiency is improved, and the using effect of the polyurethane heat preservation pipe is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting elbows, in particular to a polyurethane thermal insulation pipe connecting elbow that is easy to connect. Background Art

[0002] Polyurethane insulated pipe, full name: high-density polyethylene plastic outer polyurethane foam prefabricated direct buried insulated pipe, is used for insulation and cold preservation projects in heating, cooling, hot oil transportation, chemical industry and other industries, and is widely used in liquid and gas transportation pipelines, chemical pipelines, insulation projects, petroleum, central heating network, central air conditioning ventilation ducts, municipal engineering, etc. The connecting elbow is mainly used for the turning of the insulated straight pipe, and is generally used in conjunction with the insulated pipe. It is used for compensation when the pipeline is designed according to the insulation project. However, the traditional insulated pipe connecting elbow often faces installation difficulties during installation, and may require additional sealing materials or repair procedures, making the overall installation process inconvenient.

[0003] Prior art CN201520365831.9 A thermal insulation pipe elbow and elbow seal, providing a thermal insulation pipe elbow seal that can effectively reduce the amount of on-site construction during LNG pipeline insulation treatment and improve construction efficiency. However, the prior art ignores the problem that the connection elbow may also cause heat loss, and the prior art cannot adjust the elbow angle according to the actual pipeline conditions, and cannot solve the construction efficiency problem. Therefore, in response to the above problems, the utility model proposes a polyurethane thermal insulation pipe connection elbow that is easy to connect. Utility Model Content

[0004] The purpose of the utility model is to provide a polyurethane thermal insulation pipe connecting elbow that is easy to connect. The installation is simple, the connection is convenient, and the connection angle of the connecting elbow can be changed according to actual conditions. At the same time, the heat loss of the conveying medium can be avoided, the pipeline construction efficiency can be improved, and the use effect of the polyurethane thermal insulation pipe can be guaranteed.

[0005] To achieve the above purpose, the utility model adopts the following technical solution: a polyurethane thermal insulation pipe connecting elbow that is easy to connect, including a bending part and a straight pipe connecting part, wherein:

[0006] The bending portion includes two first connecting rings, between which a soft adjustable elbow and a hard adjustable elbow arranged outside the soft adjustable elbow for protecting the soft adjustable elbow are connected;

[0007] The straight pipe connecting part includes straight pipe components arranged at both ends of the curved part, one end of the straight pipe component is connected to the first connecting ring, and the other end of the straight pipe component is connected to a connecting component for connecting to a polyurethane insulation pipe.

[0008] Optionally, the rigid adjustable elbow comprises a first telescopic elbow and a second telescopic elbow movably connected to the first telescopic elbow, a small pulley is provided on the inner side of the first telescopic elbow, and a fixing screw for fixing the rigid adjustable elbow is provided on the first telescopic elbow;

[0009] The surface of the soft adjustable elbow is provided with a heat-insulating coating layer.

[0010] Optionally, the straight pipe assembly includes an inner pipe connected to both ends of the soft adjustable elbow and a protective structure arranged on the outside of the inner pipe, the protective structure includes an insulation layer arranged on the outer surface of the inner pipe, an anti-permeability layer arranged on the outside of the insulation layer, and a hard protective layer arranged on the outside of the anti-permeability layer, and the length of the inner pipe is greater than the length of the protective structure.

[0011] Optionally, the connecting assembly includes a second connecting ring arranged at the other end of the protective structure and a third connecting ring arranged on the polyurethane thermal insulation pipe, the second connecting ring is provided with a plurality of connecting screws, the third connecting ring is provided with a plurality of threaded holes compatible with the connecting screws, the second connecting ring and the third connecting ring have the same structural dimensions, rubber pads are provided on the inner sides of the second connecting ring and the third connecting ring, and the number of the connecting screws and the threaded holes are the same.

[0012] Optionally, the material of the insulation layer is set to inorganic material, organic material, composite material or thermal insulation material, the material of the anti-permeability layer is set to elastic coating, asphalt coating, moisture-proof agent, polymer film or high-density polyethylene film, and the material of the hard protective layer is set to hard foam, polyethylene film or glass fiber.

[0013] Therefore, the utility model adopts a polyurethane thermal insulation pipe connecting elbow that is easy to connect with the above structure, and the beneficial effects achieved are:

[0014] 1. The utility model can adjust the angle of the connecting elbow according to the actual pipeline laying conditions by providing an adjustable bending part, and after adjusting the angle, the fixed hard adjustable elbow can be adjusted according to the adjustment conditions of the soft adjustable elbow, thereby protecting the bending part, reducing maintenance costs, and extending the service life of the connecting elbow.

[0015] 2. The utility model can conveniently and simply connect the connecting elbow to the polyurethane thermal insulation pipe by providing a connecting ring, and the sealing of the connecting elbow is increased by providing a rubber pad on the inner side of the connecting ring. At the same time, the outer side of the large straight pipe part of the connecting elbow is provided with an insulation layer, an anti-penetration layer and a hard protective layer, which further avoids the heat loss of the conveying medium and ensures the conveying effect of the polyurethane thermal insulation pipe.

[0016] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be 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 paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of the device provided by the utility model;

[0019] Figure 2 A schematic diagram of the structure of the bending part provided by the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the straight pipe connection part provided by the utility model;

[0021] Figure numerals: 1. connecting ring; 2. soft adjustable elbow; 3. hard adjustable elbow; 31. first telescopic elbow; 311. small pulley; 312. fixing screw; 32. second telescopic elbow; 4. inner tube; 5a. insulation layer; 5b. anti-penetration layer; 5c. hard protective layer; 6. second connecting ring; 61. connecting screw; 7. third connecting ring; 71. threaded hole. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0023] Example

[0024] like Figure 1-3 As shown, the utility model provides a polyurethane thermal insulation pipe connecting elbow that is easy to connect, including a bending part and a straight pipe connecting part, wherein:

[0025] like Figure 1-2 As shown, the bending portion includes two first connecting rings 1, between which a soft adjustable elbow 2 and a hard adjustable elbow 3 arranged on the outside of the soft adjustable elbow 2 for protecting the soft adjustable elbow 2 are connected.

[0026] The rigid adjustable elbow 3 comprises a first telescopic elbow 31 and a second telescopic elbow 32 movably connected to the first telescopic elbow 31 . A small pulley 311 is arranged on the inner side of the first telescopic elbow 31 . A fixing screw 312 for fixing the rigid adjustable elbow 3 is arranged on the first telescopic elbow 31 .

[0027] The surface of the soft adjustable elbow 2 is provided with a layer of heat insulation coating. The soft adjustable elbow 2 can adjust the angle of the connecting elbow according to the actual pipe laying conditions, and after adjusting the angle, adjust the second telescopic elbow 32 to slide inside the first telescopic elbow 31 until it is compatible with the angle and length of the soft adjustable elbow 2, and then tighten the fixing screw 312 to fix the bending part, which is simple to operate and easy to install.

[0028] like Figure 3 As shown, the straight pipe connecting part includes straight pipe assemblies arranged at both ends of the curved part, one end of the straight pipe assembly is connected to the first connecting ring 1, and the other end of the straight pipe assembly is connected to a connecting assembly for connecting to a polyurethane insulation pipe.

[0029] The straight pipe assembly includes an inner pipe 4 connected to both ends of the soft adjustable elbow 2 and a protective structure arranged on the outside of the inner pipe 4, the protective structure includes an insulation layer 5a arranged on the outer surface of the inner pipe 4, an anti-permeation layer 5b arranged on the outside of the insulation layer 5a, and a hard protective layer 5c arranged on the outside of the anti-permeation layer 5b. The length of the inner pipe 4 is greater than the length of the protective structure, that is, the protruding part of the inner pipe 4 is used to connect with the polyurethane insulation pipe.

[0030] The material of the thermal insulation layer 5a is set to inorganic material, organic material, composite material or thermal insulation material, the material of the anti-permeability layer 5b is set to elastic coating, asphalt coating, moisture-proof agent, polymer film or high-density polyethylene film, and the material of the hard protective layer 5c is set to hard foam, polyethylene film or glass fiber.

[0031] The connecting assembly includes a second connecting ring 6 arranged at the other end of the protective structure and a third connecting ring 7 arranged on the polyurethane insulation pipe, the second connecting ring 6 is provided with a plurality of connecting screws 61, the third connecting ring 7 is provided with a plurality of threaded holes 71 adapted to the connecting screws 61, the second connecting ring 6 and the third connecting ring 7 have the same structural dimensions, the inner sides of the second connecting ring 6 and the third connecting ring 7 are both provided with rubber pads, and the number of the connecting screws 61 and the threaded holes 71 are the same.

[0032] When using the connecting elbow, first adjust the angle of the bending part, then connect the protruding part of the inner tube 4 with the polyurethane insulation pipe, and then connect the inner tube 4 and the insulation pipe tightly by connecting the second connecting ring 6 and the third connecting ring 7 (the connecting part is inside the third connecting ring 7, and the sealing of the connection can be guaranteed by tightening the connecting screws 61) to ensure the sealing.

[0033] Therefore, the utility model provides a polyurethane insulated pipe connecting elbow that is easy to connect. It is simple to install and easy to connect, and the connection angle of the connecting elbow can be changed according to actual conditions. At the same time, it can avoid heat loss of the conveying medium, improve pipeline construction efficiency, and ensure the use effect of the polyurethane insulated pipe.

[0034] Finally, it should be noted that: This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. At the same time, for those skilled in the art, according to the ideas of the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A polyurethane thermal insulation pipe connecting elbow that is easy to connect, characterized in that: It includes a curved part and a straight pipe connection part, wherein: The bending portion includes two first connecting rings, between which a soft adjustable elbow and a hard adjustable elbow arranged outside the soft adjustable elbow for protecting the soft adjustable elbow are connected; The straight pipe connecting part includes straight pipe components arranged at both ends of the curved part, one end of the straight pipe component is connected to the first connecting ring, and the other end of the straight pipe component is connected to a connecting component for connecting to a polyurethane insulation pipe.

2. The polyurethane thermal insulation pipe connecting elbow that is easy to connect according to claim 1 is characterized in that: The rigid adjustable elbow comprises a first telescopic elbow and a second telescopic elbow movably connected to the first telescopic elbow, a small pulley is arranged on the inner side of the first telescopic elbow, and a fixing screw for fixing the rigid adjustable elbow is arranged on the first telescopic elbow; The surface of the soft adjustable elbow is provided with a heat-insulating coating layer.

3. The polyurethane thermal insulation pipe connecting elbow that is easy to connect according to claim 2 is characterized in that: The straight pipe assembly includes an inner pipe connected to both ends of the soft adjustable elbow and a protective structure arranged on the outside of the inner pipe, the protective structure includes an insulation layer arranged on the outer surface of the inner pipe, an anti-permeability layer arranged on the outside of the insulation layer, and a hard protective layer arranged on the outside of the anti-permeability layer, and the length of the inner pipe is greater than the length of the protective structure.

4. The polyurethane thermal insulation pipe connecting elbow that is easy to connect according to claim 3 is characterized in that: The connecting assembly includes a second connecting ring arranged at the other end of the protective structure and a third connecting ring arranged on the polyurethane insulation pipe, the second connecting ring is provided with a plurality of connecting screws, the third connecting ring is provided with a plurality of threaded holes adapted to the connecting screws, the second connecting ring and the third connecting ring have the same structural dimensions, rubber pads are provided on the inner sides of the second connecting ring and the third connecting ring, and the number of the connecting screws and the threaded holes are the same.

5. The polyurethane thermal insulation pipe connecting elbow that is easy to connect according to claim 4 is characterized in that: The material of the thermal insulation layer is set to inorganic material, organic material, composite material or thermal insulation material, the material of the anti-permeability layer is set to elastic coating, asphalt coating, moisture-proof agent, polymer film or high-density polyethylene film, and the material of the hard protective layer is set to hard foam, polyethylene film or glass fiber.

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