CN210716336U - Heat preservation and insulation center pipe - Google Patents
Heat preservation and insulation center pipe Download PDFInfo
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- CN210716336U CN210716336U CN201921129425.7U CN201921129425U CN210716336U CN 210716336 U CN210716336 U CN 210716336U CN 201921129425 U CN201921129425 U CN 201921129425U CN 210716336 U CN210716336 U CN 210716336U
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Abstract
The utility model relates to a heat transfer technical field in the pit of well deep geothermal closed, concretely relates to heat preservation and insulation center tube. The application provides a heat preservation and insulation center tube includes the tubular metal resonator, the tubular metal resonator is provided with the external coating outward, be provided with the undercoating in the tubular metal resonator, external coating and undercoating are thermal insulation layer. The application provides a heat preservation and insulation center tube is provided with the external coating outside the metal tube, is provided with the undercoating in the metal tube, and external coating and undercoating are the thermal-insulated layer that keeps warm, set up the thermal-insulated layer that keeps warm on the metal tube surface, have consequently increased the thermal-insulated performance that keeps warm, reduce the heat loss, can effectively improve the utilization ratio of geothermal energy.
Description
Technical Field
The utility model relates to a heat transfer technical field in the pit of well deep geothermal closed, concretely relates to heat preservation and insulation center tube.
Background
The geothermal resources in China are widely distributed, are renewable energy sources, and have the advantages of abundant reserves, cleanness, great development potential, direct utilization and the like. Due to the fact that coal-fired heating causes long-time and large-range haze weather in the northern area of China, the northern area is greatly promoted to be cleaned and heated in winter, and the heating is not slow. The geothermal energy heat supply can reduce large-scale coal burning, reduce the dual pressure of the protection supply and the price caused by natural gas heat supply, and reduce the severe weather of the northern haze in winter, thereby being undoubtedly a good solution for cleaning and heating in winter at present.
The traditional intermediate-deep geothermal heating (hydrothermal type) faces the problems of recharge, scaling corrosion, small amount of geothermal well water and dry hole. The geothermal exploration degree in China is generally low, and the exploitation of hydrothermal resources is not protective exploitation when the resource conditions are not clearly researched.
The closed underground heat exchange system for middle-deep geothermal energy is one heat taking technology without affecting underground water resource, and is one heat exchange process between softened pure water and geothermal reservoir to obtain geothermal energy without pumping geothermal fluid.
The heat preservation and insulation performance of the central pipe is a key core technology of a medium-deep geothermal closed type underground heat exchange system, the heat loss of hot water heated by a stratum from underground to a wellhead can be reduced, the central pipe on the market at present is mainly made of PPR (polypropylene random, Chinese name) or PERT (polyethylene of random copolymerization resistance pipe, Chinese name is heat-resistant polyethylene), the applicable temperature of the central pipe is generally less than 90 ℃, the heat conductivity coefficient is generally 0.24-0.40W/m.K, but the existing central pipe has poor heat preservation and insulation performance, low tensile strength and short service life, and the full utilization of geothermal energy is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses (one) the technical problem that solve is: the existing central tube has poor heat insulation performance, low tensile strength, short service life, influences the full utilization of geothermal energy and the like.
(II) technical scheme
In order to solve the technical problem, the utility model provides a thermal-insulated center tube keeps warm, including the tubular metal resonator, the tubular metal resonator is provided with the external coating outward, be provided with the undercoating in the tubular metal resonator, external coating and undercoating are thermal insulation layer.
According to an embodiment of the present invention, the outer coating and the inner coating are both nanocomposite ceramic coatings.
According to an embodiment of the present invention, the thickness of the nanocomposite ceramic coating is 0.1mm to 4 mm.
According to an embodiment of the present invention, the nanocomposite ceramic coating has a thermal conductivity of 0.04W/m · K.
According to the utility model discloses an embodiment, set up the tubular metal resonator outside the thickness of nanometer composite ceramic coating is in with the setting the tubular metal resonator is inboard the thickness of nanometer composite ceramic coating is unanimous.
According to the utility model discloses an embodiment, the tubular metal resonator is the steel pipe, the diameter of steel pipe is 60mm-140mm, the wall thickness of steel pipe is 6mm-13 mm.
According to the utility model discloses an embodiment, adopt the mode of spraying after the sand blasting of tubular metal resonator surface will the external coating with the undercoating sets up on the tubular metal resonator.
The utility model has the advantages that: the application provides a heat preservation and insulation center tube is provided with the external coating outside the metal tube, is provided with the undercoating in the metal tube, and external coating and undercoating are the thermal-insulated layer that keeps warm, set up the thermal-insulated layer that keeps warm on the metal tube surface, have consequently increased the thermal-insulated performance that keeps warm, reduce the heat loss, can effectively improve the utilization ratio of geothermal energy.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic cross-sectional view of an insulated center tube as provided herein.
1. Metal pipe, 2, inner coating, 3, outer coating.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
As shown in fig. 1, the utility model provides a heat preservation and insulation center tube, including tubular metal resonator 1, tubular metal resonator 1 is provided with external coating 3 outward, be provided with undercoating 2 in the tubular metal resonator 1, external coating 3 and undercoating 2 are the heat preservation and insulation layer.
The application provides a heat preservation and insulation center tube is provided with external coating 3 outside tubular metal resonator 1, is provided with undercoating 2 in the tubular metal resonator 1, and external coating 3 and undercoating 2 are the thermal-insulated layer that keeps warm, sets up the thermal-insulated layer that keeps warm on 1 surface of tubular metal resonator, has consequently increased the thermal-insulated performance that keeps warm, reduces the heat loss, can effectively improve the utilization ratio of geothermal energy.
According to one embodiment of the present invention, the outer coating 3 and the inner coating 2 are both nanocomposite ceramic coatings.
The nano composite ceramic coating used by the utility model comprises the following components: 92% of alumina powder, 6% of boron nitride powder and 2% of organic solvent. Is a coating which is commonly used at present.
According to an embodiment of the present invention, the thickness of the nanocomposite ceramic coating is 0.1mm to 4 mm.
Preferably, the thickness of the nano composite ceramic coating is 2mm, the thickness of the nano composite ceramic coating is one fifth of the wall thickness of the metal pipe 1, the nano composite ceramic coating has the best heat insulation performance, and the coating is firm.
According to an embodiment of the present invention, the nanocomposite ceramic coating has a thermal conductivity of 0.04W/m · K.
According to the utility model discloses an embodiment, set up the tubular metal resonator 1 outside the thickness of nanometer composite ceramic coating is in with the setting 1 inboard the thickness of nanometer composite ceramic coating is unanimous.
According to the utility model discloses an embodiment, tubular metal resonator 1 is the steel pipe, the diameter of steel pipe is 60mm-140mm, the wall thickness of steel pipe is 6mm-13 mm.
According to the utility model discloses an embodiment, adopt the mode of spraying after the sandblast of tubular metal resonator 1 surface will outer coating 3 with interior coating 2 sets up on the tubular metal resonator 1.
Specifically, the spraying mode is as follows: one sleeve with the specification of phi 139.7mm multiplied by 10.54mm, the material of N80 and the length of 10m is selected. Two kilograms of nano composite ceramic paint is used for cleaning the inside and outside of the steel pipe, such as oil removal, rust removal and the like, and then sand blasting is carried out on the inner and outer diameter surfaces, wherein the sand blasting is carried out by more than Sa2.5 grade, and the surface roughness is 40-50 micrometers; fully stirring the heat-insulating waterproof coating until the heat-insulating waterproof coating is uniform and has no precipitate, and then filtering the mixture by using a 100-mesh filter screen; the heat-insulating waterproof coating is atomized at high temperature, and is sprayed inside and outside by adopting a high-temperature spraying process, the surface area of the inside and the surface area of the outside are sprayed twice respectively, and the spraying thickness is about 2 mm. And drying the sprayed central pipe, testing the heat conductivity coefficient to be 0.08W/m.K after drying, and using the dried central pipe as an underground heat exchanger of a medium-deep geothermal closed underground heat exchange system.
The roughness of the inner wall and the outer wall of the metal pipe 1 is 0.01, so that hydraulic friction loss can be effectively reduced; the composite material also has the characteristics of corrosion resistance, high strength, long service life, convenient construction, low comprehensive cost and the like, and can effectively improve the utilization rate of geothermal energy.
The working principle of the thermal insulation central pipe is explained below.
The utility model discloses a heat preservation and insulation center tube through the nanometer composite ceramic coating of 1 internal surface of tubular metal resonator and surface, can reduce the coefficient of heat conductivity of center tube, improves the heat preservation and insulation properties of center tube, increases the life of center tube, reaches the purpose of make full use of geothermal energy. The heat conductivity coefficient of the heat-preservation and heat-insulation central pipe is 0.05-0.1W/m.K, which is 0.12-0.25 times of the heat conductivity coefficient of the central pipe made of the existing PPR material or PERT material, so that the heat-preservation and heat-insulation performance of the central pipe can be effectively improved, and the heat loss is reduced.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. The utility model provides a heat preservation thermal-insulated center tube which characterized in that: the heat-insulating pipe comprises a metal pipe, wherein an outer coating is arranged outside the metal pipe, an inner coating is arranged inside the metal pipe, and the outer coating and the inner coating are both heat-insulating layers;
the outer coating and the inner coating are both nano composite ceramic coatings;
the thickness of the nano composite ceramic coating arranged on the outer side of the metal pipe is consistent with that of the nano composite ceramic coating arranged on the inner side of the metal pipe.
2. The insulated center tube of claim 1, wherein: the thickness of the nano composite ceramic coating is 0.1mm-4 mm.
3. The insulated center tube of claim 1, wherein: the thermal conductivity coefficient of the nano composite ceramic coating is 0.04W/m.K.
4. The insulated center tube of claim 1, wherein: the thickness of the nano composite ceramic coating arranged on the outer side of the metal pipe is consistent with that of the nano composite ceramic coating arranged on the inner side of the metal pipe.
5. The insulated center tube of claim 1, wherein: the metal pipe is a steel pipe, the diameter of the steel pipe is 60mm-140mm, and the wall thickness of the steel pipe is 6mm-13 mm.
6. The insulated center tube of claim 1, wherein: and after the surface of the metal pipe is subjected to sand blasting, the outer coating and the inner coating are arranged on the metal pipe in a spraying mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921129425.7U CN210716336U (en) | 2019-07-18 | 2019-07-18 | Heat preservation and insulation center pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921129425.7U CN210716336U (en) | 2019-07-18 | 2019-07-18 | Heat preservation and insulation center pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210716336U true CN210716336U (en) | 2020-06-09 |
Family
ID=70929555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921129425.7U Expired - Fee Related CN210716336U (en) | 2019-07-18 | 2019-07-18 | Heat preservation and insulation center pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210716336U (en) |
-
2019
- 2019-07-18 CN CN201921129425.7U patent/CN210716336U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200609 Termination date: 20210718 |
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| CF01 | Termination of patent right due to non-payment of annual fee |