Wrapping object structure for large-diameter central thermal insulation pipe of medium-deep geothermal well

Abstract

The utility model discloses a coating structure for a large-diameter central thermal insulation pipe of a medium-deep geothermal well, which belongs to the field of large-diameter central thermal insulation pipes and comprises an aerogel layer, a layer of aluminum foil is arranged on the aerogel layer to serve as a base layer, and 3-10 base layers are arranged to form a multi-layer coating. Side edge alkali-free glass fiber cloth belts are arranged on the two opposite sides of the multi-layer wrapping object, and the side edge alkali-free glass fiber cloth belts wrap and are fixed to the two opposite sides of the multi-layer wrapping object to form the wrapping object structure. According to the utility model, the aerogel layer is used as the base layer, and the thermal insulation performance is enhanced through the aluminum foil and a multi-layer overlapping mode, so that the heat insulation effect is greatly improved while the flexibility and the coating efficiency of the coating structure are kept. The use of the side alkali-free glass fiber cloth tape not only enhances the structural stability of the coating, but also effectively prevents the leakage of powder and fiber, thereby reducing the potential harm to the environment and human body.

Description

Technical Field

[0001] This utility model belongs to the field of large-diameter central insulation pipes, specifically relating to a covering structure for large-diameter central insulation pipes used in medium-deep geothermal wells. Background Technology

[0002] A centrally insulated pipe is a piping system used to transport hot media (such as hot water and steam). Its core function is to reduce heat loss through a highly efficient insulation structure, while protecting the pipe itself and the external environment. A centrally insulated pipe typically consists of three layers: a working pipe (inner layer), an insulation layer (middle layer), and an outer protective pipe (outer layer). The centrally insulated pipe primarily uses the insulation layer to reduce heat transfer between the medium inside the pipe and the external environment, thereby maintaining a stable temperature for the medium. When hot media are transported in the working steel pipe, the insulation layer effectively prevents heat dissipation, reducing heat loss and ensuring minimal heat loss during transport. Conversely, when transporting cold media, the insulation layer prevents external heat from entering the pipe, avoiding a rise in the medium's temperature and achieving both thermal insulation and cold insulation effects.

[0003] Currently, insulation layers generally use rigid polyurethane foam, rock wool, glass wool, or aluminum oxide as insulation materials. The insulation materials are limited and the insulation effect is not good. At the same time, rigid polyurethane foam, rock wool, and aluminum oxide all have dust problems. The dust flies in the air, affecting the environment and human health. In glass wool, the fibers are easy to be inhaled. All of these pose a risk of occupational diseases. Utility Model Content

[0004] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a covering structure for a large-diameter central insulation pipe in a medium-deep geothermal well, which solves the problems of existing insulation layer materials being singular, having poor insulation effect, and producing powder and fibers that affect the environment and human health.

[0005] This utility model is achieved through the following technical solution:

[0006] A coating structure for a large-diameter central insulation pipe in a medium-deep geothermal well includes an aerogel layer, on which an aluminum foil layer is placed as a base layer, and 3-10 base layers are placed to form a multi-layer coating; alkali-free glass fiber cloth strips are placed on opposite sides of the multi-layer coating, and the alkali-free glass fiber cloth strips are wrapped and fixed on opposite sides of the multi-layer coating to form the coating structure.

[0007] Furthermore, between the side alkali-free glass fiber cloth strips, the middle part of the covering structure is sewn parallel to the side alkali-free glass fiber cloth strips to form a middle sewing line, and a middle alkali-free glass fiber cloth strip is provided at the middle sewing line.

[0008] Furthermore, the covering structure has multiple through holes vertically.

[0009] Furthermore, the multilayer coating preferably has 5 layers.

[0010] Furthermore, the alkali-free glass fiber cloth tape on the sides is wrapped and sewn to the opposite sides of the multi-layer covering.

[0011] Furthermore, the cross-section of the multilayer covering is rectangular, and the alkali-free glass fiber cloth tape on the side wraps around the relatively long side of the multilayer covering.

[0012] Furthermore, the stitch length during the stitching process is greater than 5 mm.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention uses an aerogel layer as the base layer and enhances thermal insulation performance through aluminum foil and multi-layer stacking. This allows the coating structure to maintain flexibility and coating efficiency while significantly improving thermal insulation. Furthermore, the use of alkali-free fiberglass tape on the sides not only strengthens the structural stability of the coating but also effectively prevents powder and fiber leakage, thereby reducing potential harm to the environment and human health. Therefore, the coating structure composite provided by this invention is soft, easy to use, has high coating efficiency, does not leak powder, does not pollute the environment, reduces occupational disease risks, and simultaneously improves thermal insulation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram illustrating the application of an embodiment of the present utility model.

[0017] Figure 3 This is a structural fixing diagram of the coating of this utility model.

[0018] In the figure, 1-aerogel layer; 2-aluminum foil; 3-through hole; 4-alkaline-free glass fiber cloth tape on the side; 5-side sewing thread; 6-inner tube; 7-covering structure; 8-outer tube; 9-central sewing thread; 10-central alkali-free glass fiber cloth tape; 11, alkali-free glass fiber cloth tape. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to specific embodiments. The description is for explanation and not limitation of the present invention.

[0020] Medium-deep geothermal wells typically refer to wells drilled to depths of 3,000 to 5,000 meters. They are used to extract geothermal energy from medium-deep strata (such as sedimentary rocks and crystalline rocks). Drilling technology penetrates the strata to establish a channel between the underground heat reservoir and the surface system, extracting geothermal energy in the form of fluids (water, steam) to the surface for heating, power generation, industrial heating, and other applications. Large-diameter insulated pipes serve as the "transport channel" for this heat, and their material, diameter, and insulation scheme must be matched according to the characteristics of the fluid produced by the geothermal well (temperature, corrosiveness, flow rate). Large-diameter insulated pipes have stringent requirements for insulation performance because the large volume of the transported medium means that heat loss significantly impacts overall energy consumption.

[0021] refer to Figure 1 and Figure 2 As shown, this utility model provides a coating structure for a large-diameter central insulation pipe in a medium-deep geothermal well, comprising an aerogel layer 1, an aluminum foil layer 2 as a base layer on the aerogel layer 1, and 3-10 base layers to form a multi-layer coating; alkali-free glass fiber cloth tapes 4 are provided on opposite sides of the multi-layer coating, and the alkali-free glass fiber cloth tapes 4 wrap around and fix the opposite sides of the multi-layer coating to form the coating structure. The aerogel layer 1 and the aluminum foil layer 2 are required to be flat; the higher the flatness, the better the insulation effect.

[0022] Between the side alkali-free glass fiber cloth strips 4, the middle part of the covering structure 7 is sewn parallel to the side alkali-free glass fiber cloth strips 4 to form a central sewing line 9. A central alkali-free glass fiber cloth strip 10 is provided at the central sewing line 9 to ensure that the aluminum foil is not torn.

[0023] The aerogel layer 1 possesses excellent thermal insulation properties, effectively reducing heat loss and improving insulation efficiency. The aluminum foil 2, serving as the base layer, not only has good reflective properties, reducing heat loss through radiation, but also enhances the overall strength of the covering structure. The multi-layered base layer further improves insulation performance, minimizing heat loss during transmission. The wrapping and fixing effect of the alkali-free fiberglass tape 4 on the sides ensures the stability and durability of the covering structure, while also improving its tear and abrasion resistance. This design meets the high insulation performance requirements of large-diameter insulated pipes, effectively reducing energy consumption and improving energy utilization efficiency.

[0024] Furthermore, the covering structure has multiple vertical through holes 3 to facilitate the discharge and flow of gas.

[0025] Furthermore, the multi-layer covering is preferably five layers, which satisfies the insulation requirements while effectively controlling manufacturing costs while ensuring structural strength. Too many layers, while further improving insulation, would increase material costs and construction difficulty; conversely, too few layers might fail to meet insulation requirements. Therefore, choosing five layers as the preferred option for the multi-layer covering is a result of comprehensive consideration, being both economical and practical.

[0026] Furthermore, the cross-section of the multi-layer covering is rectangular, and the alkali-free fiberglass cloth tape 4 is wrapped and sewn to the opposite long sides of the multi-layer covering to form side seam lines 5. The rectangular design allows the covering to better conform to the shape of the large-diameter insulation pipe, reducing gaps between the insulation pipe and the covering, thereby further improving the insulation effect. At the same time, the wrapping and sewing method of the alkali-free fiberglass cloth tape 4 not only enhances the overall structural strength of the covering but also ensures that it is not easily detached or damaged during long-term use. This design considers both improved insulation performance and structural stability and durability.

[0027] Furthermore, the stitch length during stitching is greater than 5mm to improve the strength of the aluminum foil.

[0028] refer to Figure 2 and Figure 3 As shown, the covering structure 7 of this utility model is set between the inner tube 6 and the outer tube 8 to obtain a large-diameter central heat-insulating pipe. The covering structure 7 is fixed to the inner tube 6 by an alkali-free glass fiber cloth tape 11.

Claims

1. A covering structure for a large-diameter central insulation pipe in a medium-deep geothermal well, characterized in that: It includes an aerogel layer (1), on which an aluminum foil (2) is provided as a base layer, and 3-10 base layers are provided to form a multi-layer coating; alkali-free glass fiber cloth tapes (4) are provided on the opposite sides of the multi-layer coating, and the alkali-free glass fiber cloth tapes (4) are wrapped and fixed on the opposite sides of the multi-layer coating to form a coating structure (7).

2. The covering structure for a large-diameter central insulation pipe in a medium-deep geothermal well according to claim 1, characterized in that: Between the side alkali-free glass fiber cloth strips (4), the middle part of the covering structure (7) is sewn with the side alkali-free glass fiber cloth strips (4) in a parallel direction to form a middle sewing line (9), and a middle alkali-free glass fiber cloth strip (10) is provided at the middle sewing line (9).

3. The covering structure for a large-diameter central insulation pipe in a medium-deep geothermal well according to claim 1, characterized in that: The covering structure (7) has multiple through holes (3) vertically.

4. The covering structure for a large-diameter central insulation pipe in a medium-deep geothermal well according to claim 1, characterized in that: The multi-layered covering has 5 layers.

5. The covering structure for a large-diameter central insulation pipe in a medium-deep geothermal well according to claim 1, characterized in that: The side alkali-free glass fiber cloth tape (4) is wrapped and sewn to the opposite sides of the multi-layer covering.

6. The covering structure for a large-diameter central insulation pipe in a medium-deep geothermal well according to claim 5, characterized in that: The cross-section of the multi-layer covering is rectangular, and the side alkali-free glass fiber cloth tape (4) is wrapped and sewn to the opposite long side of the multi-layer covering.

7. A covering structure for a large-diameter central insulation pipe in a medium-deep geothermal well according to claim 2 or 5, characterized in that: The stitch length during stitching is greater than 5mm.

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