A kind of bionic pore pipeline heat unpowered adjusting device and pipeline assembly

Abstract

The application discloses a kind of bionic pore pipeline heat unpowered adjusting device and pipeline assembly, including bionic skin and cooling water tank, wherein bionic skin includes heat-conducting plate, liquid-absorbing core, evaporation layer, bionic pore layer and thermal expansion and contraction spring, bionic pore layer has air-permeable aperture.Bionic skin is wrapped in the outside of pipeline, and is connected with cooling water tank by siphon tube, and cooling water is stored in cooling water tank.When the temperature in pipeline rises, the air-permeable aperture of bionic skin increases, the evaporation rate of cooling water increases, the heat exchange between pipeline and external environment is enhanced, and the effect of pipeline fluid cooling is achieved.When the temperature in pipeline decreases, the air-permeable aperture shrinks or even closes, preventing the liquid-absorbing core from evaporating and exchanging heat, and serving as a heat preservation for the pipeline liquid.When the temperature of pipeline is uneven, bionic skin will adapt to the needs of heat dissipation and heat preservation, expand the aperture of bionic pore layer in the area needing heat dissipation, and shrink the aperture of bionic pore layer in the area needing heat preservation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial pipeline temperature regulation, in particular to a bionic pore pipeline heat unpowered regulation device. BACKGROUND

[0002] In the operation and maintenance of high-temperature steam pipelines in nuclear power plants and thermal power plants, very thick thermal insulation materials are needed to insulate the pipelines, but the steam temperature in the steam pipeline is affected by the stability of the reactor and the stability of the thermal power combustion, and the steam in the steam pipeline often has large temperature fluctuation. In existing power plants, the conventional method of coating the pipeline with thermal insulation materials is commonly used, but when the temperature is too high, the heat in the pipeline cannot be quickly dissipated, and the ordinary thermal insulation materials on the outside of the steam pipeline are easily damaged. The temperature fluctuation of the high-temperature steam also causes the pressure fluctuation in the pipeline, affecting the stable operation of the downstream steam turbine unit; when the temperature of the steam pipeline is lower than the rated working condition, the pipeline needs to be enhanced for thermal insulation, and the original fixed thermal insulation material cannot further improve its thermal insulation performance. The traditional pipeline insulation does not consider the non-uniformity of the pipeline temperature at the same time, especially the temperature gradient along the direction of the high-temperature working fluid flow, and the non-uniformity of the steam pipeline temperature also brings system thermal stress to the entire pipeline system, which has the risk of pipeline damage. SUMMARY

[0003] The present application provides a bionic pore pipeline heat unpowered regulation device to solve the problems of large pipeline temperature fluctuation and easy damage of thermal insulation materials.

[0004] Technical scheme: To solve the above problems, the present application adopts a bionic pore pipeline heat unpowered regulation device, which comprises a bionic skin, a water tank and a siphon pipe; the bionic skin comprises a heat conduction plate, a wicking core surrounding and covering the heat conduction plate, a bionic pore layer surrounding the wicking core and a thermal expansion and contraction spring; a circle of space is left between the wicking core and the bionic pore layer as an evaporation layer; one end of the thermal expansion and contraction spring is fixed on the heat conduction plate and extends through the wicking core to the bionic pore layer, and the other end of the thermal expansion and contraction spring is fixed on the bionic pore layer;

[0005] A plurality of air-permeable pores are provided on the bionic pore layer and communicate with the evaporation layer;

[0006] When the thermal expansion and contraction spring is elongated, the bionic pore layer moves away from the wicking core, and the air-permeable pores of the bionic pore layer become larger; when the thermal expansion and contraction spring is contracted, the bionic pore layer moves closer to the wicking core, and the air-permeable pores of the bionic pore layer become smaller;

[0007] One end of the siphon pipe is inserted into the water tank, and the other end is inserted into the wicking core.

[0008] Furthermore, the biomimetic pore layer includes several layers of heat-insulating film stacked from the inside out. The heat-insulating film is woven from linear or strip-shaped heat-insulating material units, and the heat-insulating material units are interwoven with each other, forming breathable pores at the intersections.

[0009] Furthermore, the heat-conducting plate is made of a flexible, bendable, heat-conducting material.

[0010] Furthermore, the liquid-absorbing core has a porous capillary structure.

[0011] Furthermore, the contact surface between the liquid-absorbing core and the heat-conducting plate is provided with superabsorbent polymer particles.

[0012] Furthermore, the thermal expansion and contraction spring is made of a material with thermal expansion and contraction properties.

[0013] The present invention also provides a pipe assembly having the aforementioned biomimetic pore pipe heat-regulating device, comprising a pipe and the aforementioned biomimetic pore pipe heat-regulating device arranged around the pipe; the heat-conducting plate of the biomimetic pore pipe heat-regulating device is attached to and surrounds the outer surface of the pipe.

[0014] Beneficial effects: Compared with the prior art, the significant advantages of this invention are its simple structure and high integration, which allows all necessary components to be set in a smaller device, making it more convenient for practical application; the production technology of the components and materials required by this invention is mature, easy to obtain and low in cost; the invention operates without energy consumption, does not require external power, has low component wear, saves energy and is highly safe. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the pipeline laying of the present invention;

[0016] Figure 2 This is a schematic diagram of the initial structural principle of the biomimetic skin of the present invention;

[0017] Figure 3 This is a schematic diagram illustrating the structural changes of the biomimetic skin as the temperature increases in this invention. Detailed Implementation

[0018] This embodiment presents a biomimetic pore-channel heat-regulating device without power, such as... Figure 1 As shown, it includes a bionic skin 13, a cooling water tank 10, and a siphon tube 9; the bionic skin 13 includes a heat-conducting plate 1, a liquid-absorbing core 2, an evaporation layer 3, a bionic pore layer 4, and a thermal expansion and contraction spring 8; the cooling water tank 10 contains cooling water 11.

[0019] The heat-conducting plate 1 is made of a flexible bendable heat-conducting material, such as graphite paper, heat-conducting silica gel plate, ultra-thin copper sheet, etc. The liquid-absorbing core 2 is of a porous capillary structure, and the contact surface of the liquid-absorbing core 2 and the heat-conducting plate 1 is provided with high-molecular water-absorbing resin particles. The thermal expansion spring 8 is made of a material with good thermal expansion and contraction performance, such as rubber, iron galvanized metal wire / belt, bimetallic spring, etc. The bionic pore layer 4 includes four layers of heat-insulating film 5, the heat-insulating film 5 has air-permeable apertures 7, and is woven by heat-insulating material units 6. As shown in Figure 2 , Figure 3 , the heat-insulating material unit 6 is a linear or belt-shaped heat-insulating material unit, and a plurality of heat-insulating material units are interlaced and woven, and the air-permeable apertures 7 are formed at the intersection positions.

[0020] As shown in Figure 2 , one surface of the heat-conducting plate 1 is in contact with one surface of the liquid-absorbing core 2, and the other surface of the liquid-absorbing core 2 is left with a gap as the evaporation layer 3, and the other side of the evaporation layer 3 is the bionic pore layer 4; one end of the thermal expansion spring 8 is installed on the contact surface of the liquid-absorbing core 2 and the heat-conducting plate 1, and the other end is installed on the surface of the bionic pore layer 4 close to the evaporation layer 3.

[0021] The bionic skin 13 is applied on the outer surface of the pipeline 12, and heat-conducting silicone grease is applied on the outer surface of the pipeline 12 to tightly adhere the heat-conducting plate 1 to the outer surface of the pipeline 12. One end of the siphon 9 is inserted into the bottom of the cooling water tank 10, and the other end is inserted into the liquid-absorbing core 2.

[0022] As shown in Figure 3 , when the temperature in the pipeline 12 rises, the heat is transferred to the liquid-absorbing core 2 and the thermal expansion spring 8 through the heat-conducting plate 1, the thermal expansion spring 8 expands due to the heat and extends radially to expand the bionic pore layer 4, the air-permeable apertures 7 of the outermost bionic pore layer 4 are enlarged, the surface area of the bionic pore layer 4 is increased, the evaporation rate of the cooling water 11 in the liquid-absorbing core 2 is increased, the heat exchange between the pipeline 12 and the external environment is enhanced, and the effect of cooling the fluid in the pipeline is achieved. Taking the high-temperature main steam pipe as an example, the pipeline diameter is 292 mm, and after the bionic skin 13 with a thickness of 50 mm is applied, the heat exchange surface area per unit length is increased by 5% when the thermal expansion spring 8 is extended by 10 mm due to the rise of the steam in the pipeline.

[0023] When the temperature in the pipeline 12 decreases, the thermal expansion spring 8 contracts, the bionic pore layer 4 contracts under the elastic force of the material itself, the surface area is reduced, the air-permeable apertures 7 are reduced or even closed, the evaporation and heat exchange of the liquid-absorbing core 2 are prevented, and the pipeline fluid is insulated.

[0024] When the temperature in the pipeline 12 is not uniform along the working medium flow axis, the bionic skin 13 will adapt to the heat dissipation and heat preservation requirements, the air-permeable apertures 7 of the bionic pore layer 4 are enlarged in the areas requiring heat dissipation, and the air-permeable apertures 7 of the bionic pore layer 4 are contracted in the areas requiring heat preservation.

Claims

1. A biomimetic pore-channel heat regulation device without power, characterized in that, It includes a bionic skin (13), a water tank (10), and a siphon tube (9); the bionic skin (13) includes a heat-conducting plate (1), a liquid-absorbing core (2) surrounding and covering the heat-conducting plate (1), a bionic pore layer (4) surrounding the liquid-absorbing core (2), and a thermal expansion and contraction spring (8); a gap is left between the liquid-absorbing core (2) and the bionic pore layer (4) as an evaporation layer (3); one end of the thermal expansion and contraction spring (8) is fixed on the heat-conducting plate (1) and extends through the liquid-absorbing core (2) to the bionic pore layer (4), and the other end of the thermal expansion and contraction spring (8) is fixed on the bionic pore layer (4); The biomimetic pore layer (4) is provided with several breathable pores (7) that communicate with the evaporation layer; When the thermal expansion and contraction spring (8) extends, the bionic pore layer (4) moves away from the liquid-absorbing core (2), and the air-permeable pores (7) of the bionic pore layer (4) become larger; when the thermal expansion and contraction spring (8) contracts, the bionic pore layer (4) moves closer to the liquid-absorbing core (2), and the air-permeable pores (7) of the bionic pore layer (4) become smaller. One end of the siphon tube (9) is inserted into the water tank (10), and the other end is inserted into the liquid suction core (2).

2. The biomimetic pore-channel heat-regulating device according to claim 1, characterized in that, The biomimetic pore layer (4) includes several layers of heat-insulating film (5) stacked from the inside out. The heat-insulating film (5) is woven from linear or strip-shaped heat-insulating material units (6). Several heat-insulating material units (6) are interwoven with each other, and air-permeable pores (7) are formed at the intersection.

3. The biomimetic pore channel heat-regulating device according to claim 1, characterized in that, The heat-conducting plate (1) is made of a flexible, bendable heat-conducting material.

4. The biomimetic pore channel heat-regulating device according to claim 3, characterized in that, The liquid-absorbing core (2) has a porous capillary structure.

5. The biomimetic pore channel heat-regulating device according to claim 4, characterized in that, The contact surface between the liquid-absorbing core (2) and the heat-conducting plate (1) is provided with superabsorbent polymer particles.

6. The biomimetic pore channel heat-regulating device according to claim 5, characterized in that, The thermal expansion and contraction spring (8) is made of a material with thermal expansion and contraction properties.

7. A pipe assembly having a biomimetic pore-channel heat-regulating device as described in any one of claims 1 to 6, characterized in that, The device includes a pipe and a biomimetic pore pipe heat regulation device arranged around the pipe; the heat-conducting plate (1) of the biomimetic pore pipe heat regulation device is attached to the outer surface of the pipe and surrounds and covers the outside of the pipe.

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