Composite pipe for geothermal well pump
By designing a mesh metal reinforcement layer and anti-corrosion layer in the composite pipe for geothermal well pumps, the problem of the composite pipe being easily corroded or deformed during long-term use is solved, and higher corrosion resistance and strength are achieved, which is suitable for the efficient utilization of geothermal energy.
Patent Information
- Application Number
- CN202421809322.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-29
AI Technical Summary
During long-term use, composite pipes are easily affected by the external environment, resulting in corrosion or deformation, and affecting the utilization of geothermal energy.
A composite pipe for geothermal well pump is designed. By sequentially arranged from the inside to the outside, an inner pipe, an insulation layer, an outer pipe, an anti-corrosion layer, a metal reinforcement layer and a protective layer, the metal reinforcement layer is composed of the first reinforcement pipe and the second reinforcement pipe to form a mesh structure to enhance the strength and pressure resistance of the pipe.
While taking into account both corrosion resistance and heat insulation properties, the composite pipe effectively increases the strength of the pipe, prevents deformation, and improves the adaptability to geothermal energy utilization.
Smart Images
Figure CN222937373U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of composite pipes, and particularly relates to a composite pipe for a geothermal well pump. Background Art
[0002] Geothermal energy is the natural heat energy extracted from the earth's crust. This kind of energy comes from the molten lava inside the earth and exists in the form of heat, which is the energy that causes volcanic eruptions and earthquakes. The temperature inside the earth is as high as 7000 °C, and at a depth of 80 to 100 kilometers, the temperature will drop to 650 to 1200 °C. Through the flow of groundwater and the upwelling of lava to the earth's crust 1 to 5 kilometers away from the ground, the heat is transferred to a place closer to the ground. The high-temperature lava heats the nearby groundwater, and these heated waters will eventually seep out of the ground. The simplest and most cost-effective way to utilize geothermal energy is to directly use these heat sources and extract their energy.
[0003] In the process of utilizing geothermal energy, composite pipes are needed to transmit the energy. However, during long-term use, the composite pipes are affected by the external environment and are prone to corrosion or deformation, which affects the utilization of geothermal energy. Therefore, a composite pipe for a geothermal well pump is proposed. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a composite pipe for a geothermal well pump, which solves the problem that during long-term use, the composite pipe is affected by the external environment and is prone to corrosion or deformation, which affects the utilization of geothermal energy.
[0005] The utility model is realized as follows: A composite pipe for a geothermal well pump is successively provided with an inner pipe, a heat insulation layer, an outer pipe, an anti-corrosion layer, a metal reinforcement layer and a protective layer from the inside to the outside. The metal reinforcement layer is composed of a first reinforcement pipe and a second reinforcement pipe. The structures of the first reinforcement pipe and the second reinforcement pipe are the same, but the helix directions are opposite; the first reinforcement pipe and the second reinforcement pipe intersect with each other to form a net structure.
[0006] A further technical solution of the utility model is that the protective layer is formed by wrapping and molding with glass fiber reinforced polypropylene.
[0007] A further technical solution of the utility model is that the materials of the first reinforcement pipe and the second reinforcement pipe both adopt high-strength over-plastic steel wires to enhance the strength and pressure resistance of the pipe.
[0008] A further technical solution of the utility model is that the anti-corrosion layer is made of high-strength polyethylene, polyvinyl chloride or polypropylene, and the thickness of the anti-corrosion layer is 4 mm - 8 mm.
[0009] A further technical solution of the present utility model is that the material of the heat insulation layer is glass fiber or aerogel felt, and the thickness of the heat insulation layer is 4 mm - 6 mm.
[0010] The beneficial effects of the present utility model are as follows: Compared with traditional composite pipes, the present utility model is more suitable for the utilization of geothermal energy. While taking into account corrosion resistance, it can effectively isolate heat loss. At the same time, a metal reinforcement layer is provided inside the pipeline. The first reinforcement pipe and the second reinforcement pipe are wound and interlaced with each other to form a mesh structure, which is coated on the outer surface of the anti-corrosion layer, effectively increasing the strength of the composite pipeline and preventing the composite pipeline from deforming during use. Description of the Drawings
[0011] Figure 1 is a three-dimensional structure diagram of a composite pipe for a geothermal well pump provided by the present utility model;
[0012] Figure 2 is a cross-sectional view of a composite pipe for a geothermal well pump provided by the present utility model.
[0013] Reference numerals: 1. protective layer; 11. metal reinforcement layer; 2. first reinforcement pipe; 3. second reinforcement pipe; 4. anti-corrosion layer; 5. outer pipe; 6. heat insulation layer; 7. inner pipe. Specific Embodiments
[0014] The following specific examples illustrate the embodiments of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model.
[0015] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present utility model can be implemented. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present utility model can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.
[0016] Figure 1 and Figure 2The structure of a composite pipe for a geothermal well pump is shown. The composite pipe for a geothermal well pump is provided with an inner pipe 7, an insulating layer 6, an outer pipe 5, an anti-corrosion layer 4, a metal reinforcement layer 11 and a protective layer 1 in sequence from the inside to the outside. The metal reinforcement layer 11 is composed of a first reinforcement pipe 2 and a second reinforcement pipe 3. The first reinforcement pipe 2 and the second reinforcement pipe 3 have the same structure and opposite rotation directions. The first reinforcement pipe 2 and the second reinforcement pipe 3 are intertwined to form a mesh structure.
[0017] In this embodiment, the protective layer 1 is overmolded by glass fiber reinforced polypropylene, which can provide effective protection and weather resistance for the composite pipe.
[0018] In this embodiment, the first reinforcement tube 2 and the second reinforcement tube 3 are both made of high-strength plasticized steel wire to enhance the strength and pressure resistance of the pipeline.
[0019] In this embodiment, the anti-corrosion layer 4 is made of high-strength polyethylene, polyvinyl chloride or polypropylene material, and the thickness of the anti-corrosion layer 4 is 4 mm-8 mm.
[0020] In this embodiment, the material of the thermal insulation layer 6 is glass fiber or aerogel felt, and the thickness of the thermal insulation layer 6 is 4mm-6mm. Among them, the aerogel felt is a flexible thermal insulation felt made of nano-silicon dioxide or metal aerogel as the main material, and is compounded with carbon fiber or ceramic glass fiber wool or pre-oxidized fiber felt through a special process. It is characterized by low thermal conductivity, certain tensile and compressive strength, and is a new type of pipeline insulation material, but its use cost is relatively high. Therefore, the material of the thermal insulation layer 6 can also be selected from relatively low-cost glass fiber to ensure the thermal insulation performance of the composite pipeline.
[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A composite pipe for a geothermal well pump, characterized in that: The composite pipe for a geothermal well pump is provided with an inner pipe (7), a heat insulation layer (6), an outer pipe (5), an anti-corrosion layer (4), a metal reinforcement layer (11) and a protective layer (1) in sequence from the inside to the outside. The metal reinforcement layer (11) is composed of a first reinforcement pipe (2) and a second reinforcement pipe (3). The first reinforcement pipe (2) and the second reinforcement pipe (3) have the same structure but opposite rotation directions. The first reinforcement pipe (2) and the second reinforcement pipe (3) are interlaced with each other to form a mesh structure.
2. The composite pipe for geothermal well pump according to claim 1, characterized in that: The protective layer (1) is overmolded by glass fiber reinforced polypropylene.
3. The composite pipe for geothermal well pump according to claim 1, characterized in that: The first reinforcing tube (2) and the second reinforcing tube (3) are both made of high-strength plasticized steel wire, and the winding angle between the first reinforcing tube (2) and the second reinforcing tube (3) is ±50°-±55°.
4. The composite pipe for geothermal well pump according to claim 1, characterized in that: The anti-corrosion layer (4) is made of high-strength polyethylene, polyvinyl chloride or polypropylene material, and the thickness of the anti-corrosion layer (4) is 4 mm-8 mm.
5. The composite pipe for geothermal well pump according to claim 1, characterized in that: The material of the heat insulation layer (6) is glass fiber or aerogel felt, and the thickness of the heat insulation layer (6) is 4 mm-6 mm.