Prefabricated composite pipeline with built-in heat exchanger

Abstract

The utility model discloses a prefabricated composite pipeline with a built-in heat exchanger, which belongs to the field of pipelines, and comprises an inner pipe and an outer protective pipe sleeved outside the inner pipe, a heat exchange assembly is arranged between the inner pipe and the outer protective pipe, and the heat exchange assembly specifically comprises two spiral parallel aluminum alloy strips, the aluminum alloy strips are fixed to the outer side face of the inner pipe, arc-shaped grooves are formed in the opposite faces of the two aluminum alloy strips, a heat exchange pipe bundle is spirally arranged in the arc-shaped grooves and fixedly connected with the outer side face of the inner pipe, and the outer side face of the heat exchange pipe bundle makes contact with the inner walls of the arc-shaped grooves. The aluminum alloy strip and the heat exchange tube bundle are sleeved with heat conduction silica gel, the heat conduction silica gel is fixedly sleeved with a heat insulation layer, and the outer side face of the heat insulation layer is fixedly connected with the inner wall of the outer protection tube. According to the utility model, not only can a large amount of loss of heat in the drainage process be avoided, but also the overall investment cost and maintenance cost can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of pipelines, in particular to a prefabricated composite pipeline with a built-in heat exchanger. Background Art

[0002] Recycled water and municipal sewage are a kind of flowing heat source resources. Since the water temperature is higher than the outdoor air in winter and lower than the outdoor temperature in summer, and the flow heat exchange effect is better than the flow heat exchange effect of air, it can be used for heating in winter and air conditioning in summer. Industrial low-temperature waste water is also a kind of waste heat resource that can be used, but it often contains slag, organic oil, chemical poisons and other substances. Direct heat exchange will cause corrosion and wear of the heat exchange surface.

[0003] The existing industry generally uses waste heat from grey water and municipal sewage (for cooling and heating) by building a heat pump room + supporting drainage pipes, diverting grey water and municipal sewage to the air conditioning room through newly laid pipes, absorbing their heat with heat pumps (in summer, the air conditioner releases heat to the water body), and then transporting them back to the original grey water or municipal sewage pipes through pipes. However, this method has certain defects. A large amount of heat will be lost during the drainage process, and the overall investment cost and maintenance cost are high.

[0004] Therefore, those skilled in the art provide a prefabricated composite pipe with a built-in heat exchanger to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to provide a prefabricated composite pipe with a built-in heat exchanger, which can not only avoid a large amount of heat loss during the drainage process, but also effectively reduce the overall investment cost and maintenance cost, so as to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A prefabricated composite pipe with a built-in heat exchanger, comprising:

[0008] An inner tube, and an outer protective tube sleeved outside the inner tube,

[0009] Wherein, a heat exchange component is provided between the inner tube and the outer protective tube.

[0010] As a further solution of the utility model: the heat exchange component specifically includes: two spirally parallel aluminum alloy bars, the aluminum alloy bars are fixed on the outer side of the inner tube, the opposite surfaces of the two aluminum alloy bars are provided with arc grooves, and a heat exchange tube bundle is spirally arranged in the arc groove, the heat exchange tube bundle is fixedly connected to the outer side surface of the inner tube, and the outer side surface of the heat exchange tube bundle is in contact with the inner wall of the arc groove.

[0011] As a further solution of the utility model: the aluminum alloy strips and the outer sheaths of the heat exchange tube bundle are provided with thermal conductive silicone.

[0012] As a further solution of the utility model: a heat insulating layer is fixedly sleeved on the outside of the heat conductive silica gel, and the outer side surface of the heat insulating layer is fixedly connected to the inner wall of the outer protective tube.

[0013] As a further solution of the utility model: both ends of the heat exchange tube bundle are respectively fixedly connected with tube bundle interfaces, and the tube bundle interfaces are connected to external pipelines.

[0014] As a further solution of the utility model: a heat-carrying medium flows in the heat exchange tube bundle, and the heat-carrying medium includes one of water, Freon, fluoroalkane, perfluoroalkane, and silicone oil.

[0015] As a further solution of the utility model: the end of the outer protective pipe is fixedly connected with a socket, and the socket is connected to external upstream and downstream pipelines.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The prefabricated composite pipe of the present application can directly recycle waste heat during the sewage drainage stage, thereby avoiding a large amount of heat loss during the drainage process and effectively reducing the overall investment cost and maintenance cost.

[0018] 2. The present application uses the excellent thermal conductivity of aluminum alloy to absorb the heat of the flowing sewage in the inner tube and conduct it to the heat exchange tube bundle, thereby improving the heat exchange efficiency of the heat exchange tube bundle.

[0019] 3. The present application provides arc grooves matching the heat exchange tube bundle on the opposite sides of the two aluminum alloy strips, which can increase the contact area between the heat exchange tube bundle and the aluminum alloy strips without affecting the normal connection between the heat exchange tube bundle and the inner tube, thereby making it easier for the heat absorbed by the aluminum alloy strips to be transferred to the heat exchange tube bundle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a prefabricated composite pipeline with a built-in heat exchanger;

[0021] Figure 2 A prefabricated composite pipe with a built-in heat exchanger Figure 1 Enlarged view of part A.

[0022] In the figure: 1. Inner tube; 2. Heat exchange tube bundle; 3. Thermal conductive silicone; 4. Thermal insulation layer; 5. Outer protective tube; 6. Tube bundle interface; 7. Socket; 8. Aluminum alloy strip; 9. Arc groove. DETAILED DESCRIPTION

[0023] 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.

[0024] As mentioned in the background technology of this application, the author of the utility model has found through research that the existing industry uses waste heat from grey water and municipal sewage for cooling and heating, generally by building a heat pump room + supporting drainage water pipelines, draining grey water and municipal sewage to the air conditioning room through newly laid pipelines, using heat pumps to absorb their heat, releasing heat to the water body for the air conditioner in summer, and then transporting it back to the original grey water or municipal sewage pipeline through pipelines. However, this method has certain defects, and a large amount of heat will be lost during the drainage process, and the overall investment cost and maintenance cost are high.

[0025] In order to solve the above-mentioned defects, the present application discloses a prefabricated composite pipe with a built-in heat exchanger, which directly recovers waste heat during the sewage drainage stage, thereby avoiding a large amount of heat loss during the drainage process and effectively reducing the overall investment cost and maintenance cost.

[0026] The following will describe in detail how the solution of the present application solves the above technical problems in conjunction with the accompanying drawings.

[0027] See also Figures 1-2 In an embodiment of the utility model, a prefabricated composite pipeline with a built-in heat exchanger includes: an inner tube 1, and an outer protective tube 5 sleeved on the outside of the inner tube 1, wherein a heat exchange component is provided between the inner tube 1 and the outer protective tube 5. The prefabricated composite pipeline of the present application can directly recycle waste heat in the sewage drainage stage, thereby avoiding a large amount of heat loss during the drainage process, and can also effectively reduce the overall investment cost and maintenance cost. It should be noted that the inner tube 1 is used for reclaimed water sewage or other liquid and gaseous flow channels that can be used for heat absorption and heat release, and is made of cast iron, stainless steel, titanium, ceramics and the like, or the corresponding corrosion-resistant materials are selected according to the corrosiveness of the internal fluid, and are used for reclaimed water sewage or other liquid and gaseous fluids that can be used for heat absorption and heat release to exchange heat with the externally wound heat exchange tube bundle 2. The outer protective tube 5 is generally made of corrosion-resistant and oxidation-resistant materials such as cement pipes, rubber-plastic pipes, and fiberglass pipes.

[0028] In this embodiment: the heat exchange assembly specifically includes: two spirally parallel aluminum alloy strips 8, the aluminum alloy strips 8 are fixed on the outer side of the inner tube 1, the opposite sides of the two aluminum alloy strips 8 are provided with arc grooves 9, and the heat exchange tube bundle 2 is spirally provided in the arc groove 9, the heat exchange tube bundle 2 is fixedly connected to the outer side of the inner tube 1, and the outer side of the heat exchange tube bundle 2 is in contact with the inner wall of the arc groove 9. By setting the two spirally parallel aluminum alloy strips 8, the excellent thermal conductivity of the aluminum alloy is utilized to absorb the heat of the flowing sewage in the inner tube 1 and conduct it to the heat exchange tube bundle 2, thereby improving the heat exchange efficiency of the heat exchange tube bundle 2. In addition, the present application provides the arc grooves 9 matching the heat exchange tube bundle 2 on the opposite sides of the two aluminum alloy strips 8, which can increase the contact area between the heat exchange tube bundle 2 and the aluminum alloy strips 8 without affecting the normal connection between the heat exchange tube bundle 2 and the inner tube 1, thereby making it more convenient for the heat absorbed by the aluminum alloy strips 8 to be conducted to the heat exchange tube bundle 2. The heat exchange tube bundle 2 is used to exchange heat with the inner tube 1 while the heat carrier medium flows. The heat exchange tube bundle 2 can be made of copper, plastic, stainless steel and other materials. In addition, the material of the heat carrier medium can be selected according to the temperature and corrosiveness of the heat carrier medium. In this embodiment, the heat exchange tube bundle 2 is a round tube, and a flat tube, a semi-circular tube, a triangular cross-section tube and the like can also be used to strengthen the fit with the inner tube 1.

[0029] In this embodiment, the aluminum alloy strip 8 and the outer sleeve of the heat exchange tube bundle 2 are provided with heat conductive silicone 3. The heat conductive silicone 3 can fill the gap between the inner tube 1 and the aluminum alloy strip 8 and the heat exchange tube bundle 2 to reduce the heat exchange thermal resistance.

[0030] In this embodiment, the heat-conducting silica gel 3 is externally sleeved with a heat-insulating layer 4, and the outer side of the heat-insulating layer 4 is fixedly connected to the inner wall of the outer protective tube 5. The heat-insulating layer 4 can be made of hydrophobic heat-insulating materials such as hydrophobic pearl expanded rock and polyurethane foam, and is used for heat transfer between the heat exchange tube bundle 2 and the outer protective tube 5.

[0031] In this embodiment, both ends of the heat exchange tube bundle 2 are fixedly connected with tube bundle interfaces 6, and the tube bundle interfaces 6 are connected to external pipelines. The tube bundle interfaces 6 can be connected by welding, flanges, threads, etc.

[0032] In this embodiment, a heat-carrying medium flows in the heat exchange tube bundle 2, and the heat-carrying medium includes one of water, Freon, fluoroalkane, perfluoroalkane, and silicone oil.

[0033] In this embodiment: the end of the outer protective tube 5 is fixedly connected with a socket 7, and the socket 7 is connected to the upstream and downstream pipelines of the outside world. The socket 7 is generally made of corrosion-resistant plastic material and is made by plastic forming.

[0034] The working principle of the utility model is: when in use, the prefabricated composite pipe is connected to the upstream and downstream pipes of the outside world through the socket 7, and then the heat medium is circulated to the heat exchange tube bundle 2 through the tube bundle interface 6. At the same time, the sewage with residual heat is introduced into the inner tube 1. During the process, the residual heat in the sewage is transferred to the heat exchange tube bundle 2 by the inner tube 1, thereby increasing the temperature of the heat medium in the heat exchange tube bundle 2. It should be noted that the present application uses the excellent thermal conductivity of the aluminum alloy to absorb the heat of the flowing sewage in the inner tube 1 by setting two spirally parallel aluminum alloy strips 8, thereby improving the heat exchange efficiency of the heat exchange tube bundle 2. In addition, the present application provides an arc groove 9 matching the heat exchange tube bundle 2 on the opposite surfaces of the two aluminum alloy strips 8, which can increase the contact area between the heat exchange tube bundle 2 and the aluminum alloy strips 8 without affecting the normal connection between the heat exchange tube bundle 2 and the inner tube 1, thereby making it more convenient to transfer the heat absorbed by the aluminum alloy strips 8 to the heat exchange tube bundle 2.

[0035] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0036] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A prefabricated composite pipe with a built-in heat exchanger, characterized in that: include: An inner tube (1), and an outer protective tube (5) sleeved on the outer side of the inner tube (1), Wherein, a heat exchange component is provided between the inner tube (1) and the outer protective tube (5); The heat exchange component specifically comprises: two aluminum alloy bars (8) arranged in parallel in a spiral, the aluminum alloy bars (8) being fixed on the outer surface of an inner tube (1), arc-shaped grooves (9) being provided on the opposite surfaces of the two aluminum alloy bars (8), and a heat exchange tube bundle (2) being spirally arranged inside the arc-shaped groove (9), the heat exchange tube bundle (2) being fixedly connected to the outer surface of the inner tube (1), and the outer surface of the heat exchange tube bundle (2) being in contact with the inner wall of the arc-shaped groove (9).

2. The prefabricated composite pipe with a built-in heat exchanger according to claim 1, characterized in that: The aluminum alloy strip (8) and the outer portion of the heat exchange tube bundle (2) are covered with heat-conducting silica gel (3).

3. The prefabricated composite pipe with a built-in heat exchanger according to claim 2, characterized in that: The heat-conducting silica gel (3) is sleeved and fixed with a heat-insulating layer (4) on its exterior, and the outer side surface of the heat-insulating layer (4) is fixedly connected to the inner wall of the outer protective tube (5).

4. The prefabricated composite pipe with a built-in heat exchanger according to claim 3, characterized in that: Both ends of the heat exchange tube bundle (2) are respectively fixedly connected with tube bundle interfaces (6), and the tube bundle interfaces (6) are connected to external pipelines.

5. The prefabricated composite pipe with a built-in heat exchanger according to claim 4, characterized in that: A heat-carrying medium flows in the heat exchange tube bundle (2), and the heat-carrying medium comprises one of water, freon, fluoroalkane, perfluoroalkane, and organic silicone oil.

6. The prefabricated composite pipe with a built-in heat exchanger according to claim 1, characterized in that: The end of the outer protective pipe (5) is fixedly connected with a socket (7), and the socket (7) is connected to external upstream and downstream pipelines.

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