Interlayer pipeline

Abstract

The utility model belongs to the field of fluid conveying, and particularly discloses an interlayer pipeline which comprises an inner pipe and a plurality of outer pipes, the outer pipes are arranged on the periphery of the inner pipe, and the outer pipes and the inner pipe are arranged to be independent pipe walls respectively and used for conveying the same fluid medium or different fluid media or fluid media with different temperatures. According to the utility model, the interlayer pipeline composed of two or more pipelines is used, so that the same fluid medium can flow back, and the fluid medium can flow; two or more different fluid media can be conveyed in the forward direction or in the reverse direction; heat tracing media flow in a plurality of different fluid media capable of generating stagnant flow at low temperature to provide temperature, so that various water pipes are effectively prevented from freezing and frost cracking, and meanwhile, the production loss caused by shutdown due to freezing of the water pipes and no cooling water in equipment operation is avoided; and some flowing media stop flowing along with temperature reduction, so that the device is convenient for personnel to use.

Description

Technical Field

[0001] The utility model belongs to the field of fluid transportation, and particularly relates to a sandwich pipeline. Background Technique

[0002] In modern society, pipelines are usually required for fluid transportation work, such as the pipelines for fire hydrants, equipment cooling water, and tap water, which are widely used;

[0003] However, when the temperature is low in winter in the north, the fire hydrants, equipment cooling water, and tap water will all freeze. In severe cases, the pipes will burst, causing great inconvenience and potential safety hazards to urban road safety, life, and production. The sandwich pipeline can adopt a small flow rate to flow back to the front of the pump to form forced flow for anti-freezing: when some flowing media stagnate with the decrease of temperature and need to be heated, the sandwich heating pipeline can be used to increase the temperature by using the medium with residual heat; there is also a situation where the flowing medium stagnates with the decrease of temperature during transportation, seriously affecting production.

[0004] Therefore, the utility model provides a sandwich pipeline to solve the problems that the freezing and cracking of pipelines affect life, safety, and the operation of enterprises. Content of the Utility Model

[0005] The purpose of the utility model is to provide a sandwich pipeline to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A sandwich pipeline, including a multi-medium flow-through type, which includes an inner pipe and several outer pipes. The outer pipes are arranged around the inner pipe, and the outer pipes and the inner pipe are respectively provided with independent pipe walls for transporting the same fluid medium, different fluid media, or fluid media at different temperatures.

[0008] Preferably, it further includes a horizontal heating type, where the outer pipe and the inner pipe are horizontally connected, and the outer pipe and the inner pipe share a pipe wall.

[0009] Preferably, it further includes an intermediate heat exchange type, where the outer pipe is arranged around the inner pipe, and the outer pipe and the inner pipe share a pipe wall.

[0010] Preferably, the dimensions, ratios, wall thicknesses, and materials of the outer pipe and the inner pipe can be adjusted according to production needs, and the materials of the outer pipe and the inner pipe can be PPR, cast iron, alloy, or PPV materials.

[0011] Preferably, the connection method of the pipe walls of the outer pipe and the inner pipe is pouring, welding, or hot melting.

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

[0013] (1) The utility model can make the same fluid medium flow reversely through the sandwich pipeline composed of two or more pipes, so as to generate flow; it can also convey two or more different fluid media forward or backward; it can also have a heat tracing medium flowing among several different fluid media that generate stagnant flow at low temperature to provide temperature, thus effectively preventing various water pipes from freezing and cracking. At the same time, it can avoid the shutdown caused by the freezing of the water pipe and the lack of cooling water for the equipment operation, resulting in production losses. There are also some situations where the flow medium stagnates as the temperature decreases, which is convenient for personnel to use.

[0014] (2) The utility model uses horizontal heating type and intermediate heat exchange type sandwich pipelines, and heats them by using a medium with temperature. One-time construction saves space and materials, reduces heat loss, and has better heating effect in the interlayer. The uses and utilization methods are diverse, which is convenient for personnel to use. Description of the Drawings

[0015] Figure 1 It is a schematic cross-sectional view of the multi-medium flow-through pipeline of the utility model;

[0016] Figure 2 It is a schematic cross-sectional view of the horizontal heating type pipeline of the utility model;

[0017] Figure 3 It is a schematic cross-sectional view of the intermediate heat exchange type pipeline of the utility model. Detailed Embodiments

[0018] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the utility model.

[0019] As shown in the attached Figure 1 to the attached Figure 3 figure:

[0020] Embodiment 1: The utility model provides a sandwich pipeline, including a multi-medium flow-through type, which includes an inner pipe and several outer pipes. The outer pipes are arranged around the inner pipe, and the outer pipes and the inner pipe are respectively provided with independent pipe walls for conveying the same fluid medium, different fluid media or different temperature fluid media.

[0021] Specifically, it also includes a horizontal heating type. The outer pipe and the inner pipe are horizontally connected, and the outer pipe and the inner pipe share a pipe wall. The shared pipe wall has good heat conduction effect, large horizontal connection contact surface, and fast heating speed. When the heat medium flows in one of the inner pipe or the outer pipe, it can quickly heat other media in the other pipe.

[0022] Specifically, it also includes an intermediate heat exchange type, where the outer tube is arranged around the inner tube, and the outer tube and the inner tube share a common wall. The common wall has good heat conduction effect. The heat medium flows in the inner tube located among several outer tubes, and can simultaneously exchange heat with the fluid media in several outer tubes, making full use of the heat and avoiding heat loss and waste.

[0023] Furthermore, the dimensions, proportions, wall thicknesses, and materials of the outer tube and the inner tube can be adjusted according to production needs. The materials of the outer tube and the inner tube can be PPR, cast iron, alloy, or PPV materials. PPR and cast iron materials have good heat insulation and heat preservation effects, alloy materials have good heat conduction effects, and PPV materials have excellent heat resistance and chemical corrosion resistance. It is possible to use alloy materials for the wall of the intermediate inner tube and materials such as PPV for the surrounding outer tubes.

[0024] Even further, the connection method between the walls of the outer tube and the inner tube is casting, welding, or hot melting. There are various connection methods, and the staff can choose according to actual needs.

[0025] As can be seen from the above, the sandwich pipeline composed of two or more pipes can reverse the flow of the same fluid medium to make it flow; it can also convey two or more different fluid media forward or backward; it can also have a heat tracing medium flowing among several different fluid media that produce stagnant flow at low temperatures to provide temperature, thereby effectively preventing various water pipes from freezing and cracking, preventing the situation that fire hydrants cannot be used in winter and delaying fire rescue, and avoiding the situation that industrial production machinery stops production due to lack of cooling water for cooling. The heat medium can also circulate at the end of the residential hot water system, so that hot water is available as soon as the faucet is turned on, saving water; at the same time, it can be applied to industrial pipeline transmission, making the flowing medium not stagnate due to low temperature; and the sandwich pipeline is integrally formed, without the problems of failure caused by displacement and other reasons in electric heat tracing and steam heat tracing. It has low energy consumption and high safety factor as heat tracing.

[0026] All the standard parts used in the present utility model can be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, it will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0027] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0028] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples" or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not have to be directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0031] In the drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved, and other structures can refer to the general design. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other.

[0032] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sandwich pipe, characterized in that: It is a multi-media flow type, including an inner tube and a plurality of outer tubes, wherein the outer tubes are arranged outside the inner tube, and the outer tubes and the inner tubes are respectively arranged as independent tube walls, for conveying the same fluid medium, different fluid media or fluid media of different temperatures.

2. A sandwich pipe according to claim 1, characterized in that: It is a horizontal heating type, the outer tube is horizontally connected to the inner tube, and the outer tube and the inner tube share a common tube wall.

3. A sandwich pipe according to claim 2, characterized in that: It is an intermediate heat exchange type, the outer tube is arranged outside the inner tube, and the outer tube and the inner tube share the same tube wall.

4. A sandwich pipe according to claim 3, characterized in that: The size, proportion, wall thickness and material of the outer tube and the inner tube can be adjusted according to production needs. The material of the outer tube and the inner tube can be PPR, cast iron, alloy, or PPV.

5. The sandwich pipe according to claim 4, characterized in that: The outer tube and the inner tube are connected by casting, welding or hot melting.

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