A ground source heat pump ground loop connection device

Abstract

The utility model relates to the technical field of buried pipe connection, disclose a kind of buried pipe connection device of ground source heat pump, including the buried pipe connection elbow of ground source heat pump, and the two ends of the connection elbow are inserted and connected with buried water pipe for ground source heat pump, and the outer wall of buried water pipe connecting end is fusedly connected with the inner wall of the connection elbow, and electric melting sleeve is sleeved on the buried water pipe, and the other end of the electric melting sleeve is inserted and connected with the connection elbow, and when the electric melting sleeve is inserted and connected in place with the connection elbow, the inner wall of the two ends of the electric melting sleeve is fusedly connected with the outer wall of the connection elbow and the buried water pipe respectively. The utility model adopts double pass fusion sealing connection, can improve the tensile strength, sealing property and the service life of connection sealing place of connection.

Description

Technical Field

[0001] This utility model belongs to the field of underground pipe connection technology, specifically an underground pipe connection device for a ground source heat pump. Background Technology

[0002] Geothermal heat pump systems, also known as ground source heat pumps, use geothermal energy (soil, groundwater, surface water, low-temperature geothermal water, and tailwater) as the cooling source for summer cooling and the low-temperature heat source for winter heating. They simultaneously provide heating, cooling, and domestic hot water. This system replaces the traditional method of using chillers and boilers for air conditioning, heating, and hot water supply. It is an effective way to improve the urban atmospheric environment and save energy, and represents a new development direction for the utilization of geothermal energy in China.

[0003] When connecting existing ground source heat pump buried pipes, the applicant found that elbows are commonly used connectors. Generally, a heat fusion method is used to connect the buried pipes and elbows. This involves heating and melting the inner wall of the elbow and the outer wall of the connection end of the buried pipe using heat fusion equipment, and then inserting and fusing the buried pipe and elbow together. However, this connection method, with its single fusion seal, has limitations in some harsh operating environments. For example, in long-term highly corrosive environments, the fusion seal has a short service life and lacks protective mechanisms. Furthermore, in environments with frequent vibrations, geological shocks can easily cause tension and leakage between the buried pipe and the elbow. To address these issues, a ground source heat pump buried pipe connection device is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a ground source heat pump buried pipe connection device in order to solve the above-mentioned problems.

[0005] The technical solution adopted by this utility model is as follows: a ground source heat pump buried pipe connection device, including a connecting elbow for the ground source heat pump buried pipe, both ends of the connecting elbow are inserted and connected to a ground source heat pump buried water pipe, the outer wall of the connecting end of the buried water pipe is thermally fused to the inner wall of the connecting elbow, an electrofusion sleeve is fitted onto the buried water pipe, the other end of the electrofusion sleeve is inserted and connected to the connecting elbow, and when the electrofusion sleeve is inserted into the connecting elbow, the inner walls of both ends of the electrofusion sleeve are thermally fused to the outer walls of the connecting elbow and the buried water pipe, respectively.

[0006] In a preferred embodiment, the electrofusion sleeve is designed with different diameters, with the inner diameter of one end matching the outer diameter of the connecting elbow and the inner diameter of the other end matching the outer diameter of the buried water pipe.

[0007] In a preferred embodiment, the electrofusion sleeve includes two heating wires and two electrodes. The two heating wires are injection-molded and embedded in the inner walls at both ends of the electrofusion sleeve, and the two electrodes are injection-molded and embedded in the outer walls at both ends of the electrofusion sleeve. The electrodes are electrically connected to the heating wires. In a preferred embodiment, each electrode is provided with a sheath, which is integrally injection molded with the electrofusion sleeve, and a protective plug is snapped onto the sheath.

[0008] In a preferred embodiment, observation holes are provided at both ends of the electrofusion sleeve.

[0009] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. In this utility model, the connecting elbow and the buried water pipe are first welded together by socket welding, and then the two ends of the electrofusion sleeve are welded to the buried water pipe and the connecting elbow, thereby forming a second weld seal for the connecting elbow and the buried water pipe, thus achieving a double weld seal, strengthening the sealing performance of the connecting elbow and the buried water pipe, and improving the tensile strength of the connecting elbow and the buried water pipe. In addition, the external electrofusion sleeve can also protect the connection between the connecting elbow and the buried water pipe, thus enabling the connection between the buried water pipe and the connecting elbow to adapt to more severe operating environments (such as highly corrosive environments, frequent vibrations, etc.). Attached Figure Description

[0010] Figure 1 This is a simplified schematic diagram of the three-dimensional structure of this utility model; Figure 2 This is a simplified cross-sectional structural diagram of the present invention; Figure 3 In this utility model Figure 2 Enlarged view of point A.

[0011] The markings in the diagram are: 1-connecting elbow, 2-buried water pipe, 3-electrofusion sleeve, 4-electric heating wire, 5-electrode, 6-sheath, 7-protective plug, 8-observation hole. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0013] The following will combine Figures 1-3 A detailed description is provided of a ground source heat pump buried pipe connection device according to an embodiment of the present invention.

[0014] Example

[0015] This utility model provides a buried pipe connection device for a ground source heat pump, referencing... Figures 1 to 3 As shown, the structure includes a connecting elbow 1 for the ground source heat pump's buried pipe. Both ends of the connecting elbow 1 are connected to a ground source heat pump's buried water pipe 2. The outer wall of the connecting end of the buried water pipe 2 is heat-fused to the inner wall of the connecting elbow 1. In the above structure, when connecting the two buried water pipes 2 of the ground source heat pump through the connecting elbow 1, the connecting end of the buried water pipe 2 and the port of the connecting elbow 1 are heated and heat-fused using a heat-fusion device. After the heat-fusion is complete, the connecting end of the buried water pipe 2 is directly inserted into the port of the connecting elbow 1, thereby heat-fusion connecting the buried water pipe 2 and the connecting elbow 1 together.

[0016] refer to Figures 1 to 3 As shown, an electrofusion sleeve 3 is fitted onto the buried water pipe 2. The other end of the electrofusion sleeve 3 is inserted into the connecting elbow 1. After the electrofusion sleeve 3 and the connecting elbow 1 are inserted into place, the inner walls of both ends of the electrofusion sleeve 3 are heat-fused to the outer walls of the connecting elbow 1 and the buried water pipe 2, respectively. In this structure, the two ends of the electrofusion sleeve 3 are fused with the buried water pipe 2 and the connecting elbow 1, thereby forming a second fusion seal for the connecting elbow 1 and the buried water pipe 2, thus achieving a double fusion seal, strengthening the sealing performance of the connecting elbow 1 and the buried water pipe 2, and improving the tensile strength of the connecting elbow 1 and the buried water pipe 2. In addition, the external electrofusion sleeve 3 can protect the connection between the connecting elbow 1 and the buried water pipe 2, thereby enabling the connection between the buried water pipe 2 and the connecting elbow 1 to adapt to more severe operating environments (such as highly corrosive environments, frequent vibrations, etc.).

[0017] refer to Figures 1 to 3 As shown, the electrofusion sleeve 3 is designed with different diameters. The inner diameter of one end is adapted to the outer diameter of the connecting elbow 1, and the inner diameter of the other end is adapted to the outer diameter of the buried water pipe 2. The electrofusion sleeve 3 is designed with different diameters so that it can be adapted to the outer diameter connection of the connecting elbow 1 and the buried water pipe 2.

[0018] refer to Figures 1 to 3 As shown, the electrofusion sleeve 3 includes two heating wires 4 and two electrodes 5. The two heating wires 4 are injection molded and embedded in the inner walls at both ends of the electrofusion sleeve 3, and the two electrodes 5 are injection molded and embedded in the outer walls at both ends of the electrofusion sleeve 3. The electrodes 5 are electrically connected to the heating wires 4. This structure utilizes the connection of the electrodes 5 to the welding machine, thereby heating the heating wires 4, and then fusing the inner wall of the electrofusion sleeve 3 with the buried water pipe 2 and the connecting elbow 1.

[0019] refer to Figures 1 to 3As shown, each electrode 5 is provided with a sheath 6. The sheath 6 and the electrofusion sleeve 3 are integrally injection molded. A protective plug 7 is snapped onto the sheath 6. In this structure, the protective plug 7 is used to block the upper opening of the cover 6, thereby sealing the electrode 5 in conjunction with the cover 6. When the electrode 5 is not in use, it can protect the electrode 5.

[0020] refer to Figures 1 to 3 As shown, observation holes 8 are provided at both ends of the electrofusion sleeve 3. When the hot melt is performed, the molten adhesive will overflow from the observation holes 8, which makes it convenient for personnel to determine the welding quality.

[0021] It should be noted that the connection methods disclosed in the above embodiments are not limited to right-angle bends, but can also be applied to direct connections and bends of other different angles.

[0022] The implementation principle of the underground pipe connection device for a ground source heat pump according to an embodiment of this application is as follows: In use, the operator first inserts the electrofusion sleeve 3 onto the underground water pipe 2, and then uses a welding heating device to heat and melt the connection end of the underground water pipe 2 and the port of the connecting elbow 1. After the heat fusion is complete, the connection end of the underground water pipe 2 is directly inserted into the port of the connecting elbow 1, thereby heat-melting the underground water pipe 2 and the connecting elbow 1 together to form the first welded seal connection. Then, the other end of the electrofusion sleeve 3 is inserted into the connecting elbow 1, and then the welding device is used... The electric heating wires 4 at both ends of the electrofusion sleeve 3 are connected to and heated, thereby fusing the inner wall of the electrofusion sleeve 3 with the buried water pipe 2 and the connecting elbow 1, thus forming a second fusion seal connection. This strengthens the sealing performance of the connecting elbow 1 and the buried water pipe 2 and improves the tensile strength of the connecting elbow 1 and the buried water pipe 2. In addition, the external electrofusion sleeve 3 can protect the connection between the connecting elbow 1 and the buried water pipe 2, thus enabling the connection between the buried water pipe 2 and the connecting elbow 1 to adapt to more severe operating environments (such as highly corrosive environments, frequent vibrations, etc.).

[0023] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A ground source heat pump buried pipe connection device, comprising a connecting elbow (1) for the ground source heat pump buried pipe, characterized in that: Both ends of the connecting elbow (1) are connected to a ground source heat pump buried water pipe (2). The outer wall of the connecting end of the buried water pipe (2) is heat-fused to the inner wall of the connecting elbow (1). An electrofusion sleeve (3) is fitted onto the buried water pipe (2). The other end of the electrofusion sleeve (3) is inserted into the connecting elbow (1). When the electrofusion sleeve (3) is inserted into the connecting elbow (1), the inner walls of both ends of the electrofusion sleeve (3) are heat-fused to the outer walls of the connecting elbow (1) and the buried water pipe (2), respectively.

2. The buried pipe connection device for a ground source heat pump as described in claim 1, characterized in that: The electrofusion sleeve (3) is designed with different diameters. The inner diameter of one end is adapted to the outer diameter of the connecting elbow (1), and the inner diameter of the other end is adapted to the outer diameter of the buried water pipe (2).

3. The buried pipe connection device for a ground source heat pump as described in claim 1, characterized in that: The electrofusion sleeve (3) includes two heating wires (4) and two electrodes (5). The two heating wires (4) are injection molded and embedded in the inner walls at both ends of the electrofusion sleeve (3), and the two electrodes (5) are injection molded and embedded in the outer walls at both ends of the electrofusion sleeve (3). The electrodes (5) are electrically connected to the heating wires (4).

4. The buried pipe connection device for a ground source heat pump as described in claim 3, characterized in that: Each electrode (5) is provided with a sheath (6), which is integrally injection molded with the electrofusion sleeve (3), and a protective plug (7) is snapped onto the sheath (6).

5. The buried pipe connection device for a ground source heat pump as described in claim 1, characterized in that: Both ends of the electrofusion sleeve (3) are provided with observation holes (8).

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