Flexible connecting device for preventing frost heaving deformation of ground source heat pump buried pipe in alpine region

Abstract

The utility model discloses a flexible connecting device for preventing frost heaving deformation of a ground source heat pump buried pipe in an alpine region, which belongs to the field of ground source heat pump buried pipes and is characterized in that flexible connecting pipelines are mounted on an outer protection pipeline and an outer protection auxiliary pipe, and expansion of frost heaving deformation is realized through the flexible connecting pipelines; the flexible connecting pipeline comprises a first supporting pipeline and a first inner pipeline, and the first supporting pipeline is arranged in the outer protection pipeline. The ductility of the flexible connecting pipeline can absorb deformation force, the buried pipe system is protected, and stability and safety are ensured. And the connection strength of the device is improved through the design of the flexible connection pipeline. Semicircular hole channels and protruding parts on the inner pipeline and the supporting pipeline ensure tight connection between the pipelines, and connection stability is enhanced. And the sealing filler in the filler bin ensures the connection sealing performance, water and impurities are prevented from invading, and the service life of the device is prolonged. The sealing filler formed by mixing multiple materials has good sealing and fireproof performance, and connection reliability and safety are ensured.

Description

Technical Field

[0001] This utility model relates to the field of ground source heat pump buried pipes, and in particular to a flexible connection device for preventing frost heave and deformation of ground source heat pump buried pipes in high-altitude and cold regions. Background Technology

[0002] The underground pipe is the core component of a ground source heat pump system. This system mainly consists of underground pipes, a heat pump unit, and heating and cooling systems. The underground pipes, as a crucial part of the system, are a series of spiral pipes buried deep underground in a specific arrangement. A circulating fluid (such as water or a water-based solution) circulates within the closed pipes, absorbing underground heat energy and converting it through heat pump technology. In winter, the circulating fluid absorbs heat energy from the ground and converts it into the heat needed indoors, thus raising the indoor temperature; simultaneously, cold energy is stored in the soil for use in summer air conditioning. In summer, the circulating fluid absorbs heat from the room, converts it into underground heat energy through the heat pump, and releases it into the soil, thus lowering the indoor temperature; at the same time, heat is stored for use in winter heating.

[0003] In high-altitude and cold regions, the fluid flowing through buried pipes in low-temperature environments can cause frost heave in the surrounding soil. This frost heave can compress the pipe-soil structure, especially components such as connecting flanges. Prolonged compression can cause deformation of the connecting flanges, thereby affecting their sealing performance. Once the sealing performance is compromised, problems such as leaks may occur, seriously affecting the normal operation of the ground source heat pump system.

[0004] Freezing heave can also reduce the flow area of ​​pipes at the connecting flanges, increasing flow resistance and further affecting the system's heat exchange efficiency. In extreme cases, it may even lead to the failure of the entire system, requiring large-scale repairs or replacements. Utility Model Content

[0005] The main purpose of this utility model is to provide a flexible connection device for preventing frost heave and deformation of buried pipes of ground source heat pumps in high-altitude and cold regions, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A flexible connection device for preventing frost heave and deformation of buried pipes of ground source heat pumps in high-altitude and cold regions includes an outer protective pipe, an outer protective secondary pipe, a branch pipe, a connecting flange, and fastening bolts. Two outer protective secondary pipes are symmetrically distributed on the outer protective pipe. The branch pipe is installed on the outer protective secondary pipe. The connecting flange is installed at the upper and lower ends of the outer protective pipe, and the fastening bolts are connected to the connecting flange.

[0008] The outer protective pipe and the outer protective secondary pipe are equipped with flexible connecting pipes, which allow for the expansion of frost heave deformation.

[0009] The flexible connecting pipe includes a first supporting pipe and a first inner pipe. The first supporting pipe is provided inside the outer protective pipe. A packing chamber is formed between the first supporting pipe and the outer protective pipe. The first inner pipe is provided inside the first supporting pipe, and multiple protruding annular pipes are provided inside the first inner pipe. A circular channel is opened on the end face of each protruding annular pipe. The inner wall of the outer protective secondary pipe is provided with a second supporting pipe, and a second inner pipe is installed inside the second supporting pipe.

[0010] In a further preferred embodiment, the first supporting pipe and the second supporting pipe are designed as an integral unit, the first inner pipe and the second inner pipe are designed as an integral unit, the side walls of the first inner pipe and the second inner pipe are provided with semi-circular hole channels, and multiple semi-circular hole channels are distributed in a ring on the first inner pipe and the second inner pipe. The first supporting pipe and the second supporting pipe are provided with semi-circular protrusions that are adapted to the semi-circular hole channels.

[0011] In a further preferred embodiment, the packing chamber is filled with sealing filler, which includes any one or a mixture of organic fireproof sealant, inorganic fireproof sealant, carbon fiber sealing filler, and polychlorotrifluoroethylene.

[0012] In a further preferred embodiment, multiple protruding annular tubes are distributed in a ring on the first inner pipe, the first inner pipe and the protruding annular tubes are designed as an integral unit, the protruding annular tubes contract toward the circular channel, and the connection between the protruding annular tubes and the first inner pipe is designed in an arc shape.

[0013] In a further preferred embodiment, the structure of the second supporting pipe is the same as that of the first supporting pipe, the structure of the second inner pipe is the same as that of the first inner pipe, and multiple protruding annular pipes are also provided on the second inner pipe;

[0014] In a further preferred embodiment, the first supporting pipe and the outer protective pipe are welded and fixed together, and the second supporting pipe and the outer protective secondary pipe are welded and fixed together, with the weld joints sealed.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By employing a symmetrical arrangement of the outer protective pipe and its secondary outer protective pipe, along with the introduction of flexible connecting pipes, this equipment can more effectively address the problem of frost heave deformation. When frost heave occurs, the flexible connecting pipes utilize their ductility to absorb and disperse the deformation force, thereby preventing damage to the buried pipe system due to frost heave deformation and ensuring the system's stability and safety.

[0017] The flexible connecting pipe design enhances the overall connection strength of the device. The semi-circular channels on the sidewalls of the first and second inner pipes, as well as the semi-circular protrusions on the first and second support pipes, ensure a tight connection between the pipes, further enhancing the stability of the connection.

[0018] The sealing packing material filling the packing chamber ensures the seal of the connection, preventing the intrusion of moisture and impurities, thereby extending the service life of the entire flexible connection device. The sealing packing material can be a mixture of various materials, such as organic fire-retardant sealant, inorganic fire-retardant sealant, carbon fiber sealing packing, and polychlorotrifluoroethylene (PTFE). These materials possess excellent sealing and fire-retardant properties, ensuring the reliability and safety of the connection.

[0019] The design of the equipment also takes into account the symmetry and uniformity of the structure. The structure of the second support pipe and the second inner pipe is the same as that of the first support pipe and the first inner pipe, and the second inner pipe is also equipped with multiple protruding annular pipes. This design ensures the structural symmetry and uniformity of the entire device, further improving the stability and durability of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a diagram showing the overall structure of the present invention;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a diagram illustrating the flexible connecting pipe of this utility model;

[0024] Figure 5 This is a schematic diagram of the flexible connection pipe of this utility model.

[0025] In the diagram: 1. Outer protective pipe; 2. Outer protective secondary pipe; 3. Branch pipe; 4. Connecting flange; 5. Fastening bolt; 6. Flexible connection pipe; 61. First supporting pipe; 62. Packing bin; 63. First inner pipe; 64. Protruding annular pipe; 65. Circular channel; 66. Second supporting pipe; 67. Second inner pipe. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] like Figure 1 - Figure 5As shown, this is a flexible connection device for preventing frost heave deformation of buried pipes in high-altitude and cold regions. The device mainly consists of an outer protective pipe 1, outer protective secondary pipes 2, branch pipes 3, connecting flanges 4, and fastening bolts 5. Two outer protective secondary pipes 2 are symmetrically arranged on both sides of the main outer protective pipe 1, and branch pipes 3 are installed on each outer protective secondary pipe 2. Connecting flanges 4 are fixed to the upper and lower ends of the main outer protective pipe 1, and fastening bolts 5 are used to connect flanges 4 to ensure the stability and safety of the entire device.

[0028] To more effectively address the issue of frost heave deformation, flexible connecting pipes 6 are installed on both the outer protective pipe 1 and the outer protective secondary pipe 2. This design allows the deformation force to be absorbed and dispersed through the extension of the flexible connecting pipes 6 when frost heave occurs, thereby protecting the entire buried pipe system from damage.

[0029] The flexible connecting pipe 6 consists of a first supporting pipe 61 and a first inner pipe 63. Inside the main outer protective pipe 1, the first supporting pipe 61 is installed, forming a packing chamber 62 between it and the outer protective pipe 1. Inside the first supporting pipe 61, the first inner pipe 63 is further installed. The first inner pipe 63 has multiple protruding annular pipes 64, each with a circular channel 65 at its end face. Furthermore, a second supporting pipe 66 is also provided on the inner wall of the outer protective secondary pipe 2, and a second inner pipe 67 is installed inside it.

[0030] The first support pipe 61 and the second support pipe 66 are designed as a single unit, as are the first inner pipe 63 and the second inner pipe 67. To enhance the flexibility and strength of the connection, multiple semi-circular channels are formed on the side walls of the first inner pipe 63 and the second inner pipe 67, and these semi-circular channels are distributed in a ring around the pipes. Simultaneously, the first support pipe 61 and the second support pipe 66 have semi-circular protrusions that fit into the semi-circular channels, thereby ensuring a tight connection between the pipes.

[0031] To ensure a tight seal, the packing chamber 62 is filled with sealing filler. This sealing filler can be one or a mixture of the following materials: organic fire-retardant sealant, inorganic fire-retardant sealant, carbon fiber sealing filler, and polychlorotrifluoroethylene.

[0032] Multiple protruding annular tubes 64 are distributed in a ring on the first inner pipe 63, and these protruding annular tubes 64 are integrally manufactured with the first inner pipe 63. The protruding annular tubes 64 taper inward toward the circular channel 65, and the connection between the protruding annular tubes 64 and the first inner pipe 63 is designed to be arc-shaped to increase the flexibility and deformation resistance of the structure.

[0033] The structure of the second support pipe 66 is the same as that of the first support pipe 61, and the structure of the second inner pipe 67 is also the same as that of the first inner pipe 63. Therefore, multiple protruding annular pipes 64 are also provided on the second inner pipe 67 to ensure the structural symmetry and uniformity of the entire device.

[0034] To ensure the stability and durability of the connection, the first supporting pipe 61 is fixed to the outer protective pipe 1 by welding, and the second supporting pipe 66 is also fixed to the outer protective auxiliary pipe 2 by welding. After welding, the weld joint is sealed to prevent the intrusion of moisture and impurities, ensuring the long-term stable operation of the entire flexible connection device.

[0035] Place the outer protective pipe 1 in the predetermined position. Arrange two outer protective auxiliary pipes 2 symmetrically on both sides of the outer protective pipe 1. Install a branch pipe 3 on each outer protective auxiliary pipe 2. Fix flanges 4 at the upper and lower ends of the main outer protective pipe 1. Connect the flanges 4 using fastening bolts 5 to ensure the stability and safety of the entire device.

[0036] Flexible connecting pipes 6 are installed on the outer protective pipe 1 and the outer protective secondary pipe 2. The flexible connecting pipe 6 consists of a first supporting pipe 61 and a first inner pipe 63. The first supporting pipe 61 is installed inside the main outer protective pipe 1, forming a packing chamber 62 between it and the outer protective pipe 1. The packing chamber 62 is filled with sealing fillers, such as organic fire-retardant sealant, inorganic fire-retardant sealant, carbon fiber sealant, polychlorotrifluoroethylene, etc. The first inner pipe 63 is installed inside the first supporting pipe 61. Multiple protruding annular pipes 64 are distributed circumferentially on the first inner pipe 63, ensuring that the protruding annular pipes 64 communicate with the circular channel 65. The connection between the protruding annular pipes 64 and the first inner pipe 63 is designed as an arc to increase flexibility and resistance to deformation.

[0037] A second support pipe 66 is installed on the inner wall of the outer protective secondary pipe 2, and a second inner pipe 67 is installed inside it. The structure of the second inner pipe 67 is the same as that of the first inner pipe 63, and it also has multiple protruding annular pipes 64. The first support pipe 61 is fixed to the outer protective pipe 1 by welding. The second support pipe 66 is also fixed to the outer protective secondary pipe 2 by welding. The welded joints are sealed to prevent moisture and impurities from entering.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" (number one, number two), are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A flexible connection device for preventing frost heave deformation of buried pipes of ground source heat pumps in high-altitude and cold regions, comprising an outer protective pipe (1), an outer protective secondary pipe (2), a branch pipe (3), a connecting flange (4), and fastening bolts (5), wherein two outer protective secondary pipes (2) are symmetrically distributed on the outer protective pipe (1), the branch pipe (3) is installed on the outer protective secondary pipe (2), the connecting flange (4) is installed at the upper and lower ends of the outer protective pipe (1), and the fastening bolts (5) are connected to the connecting flange (4), characterized in that: Flexible connecting pipes (6) are installed on the outer protective pipe (1) and the outer protective secondary pipe (2), and the expansion of frost heave deformation is realized through the flexible connecting pipes (6); The flexible connecting pipe (6) includes a first supporting pipe (61) and a first inner pipe (63). The outer protective pipe (1) is provided with the first supporting pipe (61) inside. A packing chamber (62) is formed between the first supporting pipe (61) and the outer protective pipe (1). The first supporting pipe (61) is provided with the first inner pipe (63) inside. The first inner pipe (63) is provided with a plurality of protruding annular pipes (64) inside. Each of the protruding annular pipes (64) has a circular channel (65) on its end face. The inner wall of the outer protective secondary pipe (2) is provided with a second supporting pipe (66), and the second supporting pipe (66) is provided with a second inner pipe (67).

2. The flexible connection device for preventing frost heave deformation of buried pipes of ground source heat pumps in high-altitude and cold regions according to claim 1, characterized in that: The first support pipe (61) and the second support pipe (66) are designed as a single unit, and the first inner pipe (63) and the second inner pipe (67) are designed as a single unit. The side walls of the first inner pipe (63) and the second inner pipe (67) are provided with semi-circular hole channels. Multiple semi-circular hole channels are distributed in a ring on the first inner pipe (63) and the second inner pipe (67). The first support pipe (61) and the second support pipe (66) are provided with semi-circular protrusions that are adapted to the semi-circular hole channels.

3. The flexible connection device for preventing frost heave deformation of buried pipes of ground source heat pumps in high-altitude and cold regions according to claim 2, characterized in that: The packing hopper (62) is filled with sealing packing, which includes any one or a mixture of organic fireproof sealant, inorganic fireproof sealant, carbon fiber sealing packing, and polychlorotrifluoroethylene.

4. The flexible connection device for preventing frost heave deformation of buried pipes of ground source heat pumps in high-altitude and cold regions according to claim 3, characterized in that: Multiple protruding annular tubes (64) are distributed in a ring on the first inner pipe (63). The first inner pipe (63) and the protruding annular tubes (64) are designed as a single unit. The protruding annular tubes (64) contract into the circular channel (65). The connection between the protruding annular tubes (64) and the first inner pipe (63) is arc-shaped.

5. The flexible connection device for preventing frost heave deformation of buried pipes of ground source heat pumps in high-altitude and cold regions according to claim 4, characterized in that: The structure of the second support pipe (66) is the same as that of the first support pipe (61), and the structure of the second inner pipe (67) is the same as that of the first inner pipe (63). Multiple protruding annular pipes (64) are also provided on the second inner pipe (67).

6. The flexible connection device for preventing frost heave deformation of buried pipes of ground source heat pumps in high-altitude and cold regions according to claim 5, characterized in that: The first supporting pipe (61) and the outer protective pipe (1) are welded and fixed, and the second supporting pipe (66) and the outer protective secondary pipe (2) are welded and fixed, and the weld is sealed.

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