Heat exchange pipe connection structure

Abstract

A heat exchanger pipe connection structure includes a main pipe and a connecting pipe. A protective shell is fitted over the main pipe, and a surface sleeve is provided at the top of the main pipe. A connector is fixedly connected to the top of the surface sleeve. The connector is hollow and open at the top. The main pipe, the surface sleeve, and the connector are sequentially fitted onto the outer wall of a first inner pipe. A connecting disc is fixedly connected to the bottom of the connecting pipe, and a fastening pipe threaded to the connector is fixedly connected to the bottom of the connecting disc. The connecting pipe and the connecting disc are fitted onto the outer wall of a second inner pipe, which is connected to the first inner pipe. The structure also includes a locking mechanism for locking the connector to the fastening pipe. This device improves the connection stability of the heat exchanger pipe connection structure while ensuring ease of assembly and disassembly.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange pipeline technology, specifically a heat exchange pipeline connection structure. Background Technology

[0002] The heat exchange pipe connection structure for geothermal wells is a core component of the geothermal energy system, mainly used to achieve efficient heat exchange between underground high-temperature geothermal fluids and surface equipment. Its structure typically uses high-temperature and corrosion-resistant stainless steel or alloy pipes, assembled in sections using flanges, welding, or threaded connections. The overall structure must ensure long-term stable operation in high-temperature, high-pressure, and complex geological environments to guarantee the safe and efficient transmission of geothermal energy.

[0003] However, the heat exchange pipeline connection structure has poor protection performance. After long-term use in geothermal wells or when affected by external vibrations, the connection structure may become loose, affecting the stability of the heat exchange pipeline connection structure and making it inconvenient to efficiently disassemble and maintain the heat exchange pipeline connection structure. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a heat exchange pipe connection structure that is reasonably designed, easy to disassemble, and has a stable connection.

[0005] The technical solution adopted to solve the above-mentioned technical problems is: a heat exchange pipeline connection structure, including a main pipe body and a connecting pipe. The main pipe body is covered with a protective shell, and a surface sleeve is provided at the top of the main pipe body. A connector is fixedly connected to the top of the surface sleeve. The connector is hollow and open at the top. The main pipe body, the surface sleeve, and the connector are sequentially fitted onto the outer wall of the first inner pipe. A connecting plate is fixedly connected to the bottom of the connecting pipe. A fastening pipe that is threadedly connected to the connector is fixedly connected to the bottom of the connecting plate. The connecting pipe and the connecting plate are fitted onto the outer wall of the second inner pipe. The second inner pipe is connected to the first inner pipe. The structure also includes a locking mechanism for locking the connector and the fastening pipe.

[0006] The protective shell of this utility model is provided with a protective unit, which consists of a protective layer, a buffer layer, an anti-permeability layer, and a composite layer arranged sequentially from the outside to the inside.

[0007] The protective layer of this invention is made of graphene-modified silicon carbide ceramic material, the buffer layer is made of shape memory alloy material, the anti-permeability layer is made of aluminum foil material, and the composite layer is made of epoxy resin and glass fiber reinforced plastic composite material.

[0008] The locking mechanism of this utility model includes a turntable rotatably connected to the outside of a connector. Limiting rings are fixedly connected to the upper and lower sides of the turntable, and the limiting rings can rotate within the connector. A bolt is horizontally inserted through the side wall of the turntable, and the end of the bolt passes through the connector and extends into a movable groove. Several sets of first magnetic blocks are uniformly fixedly connected within a 360° phase on the inner wall of the turntable. Several sets of movable grooves are evenly distributed within a 360° phase on the connector, and the number of first magnetic blocks corresponds to the number of movable grooves. A movable block is slidably connected to one side of the movable groove. A positioning rod is fixedly connected to the middle position of one side of the movable block. An insertion hole is provided on the outer wall of the fastening tube corresponding to the positioning rod, and a second magnetic block is fixedly connected to the inner side of the insertion hole.

[0009] Both the movable block and the positioning rod of this utility model are made of magnetic material, and the magnetic force of the first magnetic block is greater than that of the second magnetic block.

[0010] The connector of this utility model has several sets of first positioning holes evenly distributed within a 360° phase, and the connecting plate has several sets of second positioning holes evenly distributed within a 360° phase. The first positioning holes and the second positioning holes are fixedly connected by threaded fasteners.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This heat exchange pipe connection structure features a connector at the top of the main pipe. When the fastening tube on the connecting plate is rotated into the interior of the connector, the initial connection between the connector and the connecting plate is completed. Simultaneously, when the fastening tube is fully rotated into the interior of the connector, the insertion hole on the connecting plate can be aligned with the position of the positioning rod inside the connector. At this time, the positioning rod, under the magnetic force of the second magnetic block inside the insertion hole, can be inserted into the insertion hole on the fastening tube, completing the stable connection between the connector and the connecting plate. When it is necessary to separate the connector from the connecting plate, the turntable outside the connector is rotated, and the position of the first magnetic block inside the turntable is aligned with the position of the movable block. At this time, due to the magnetic force of the first magnetic block, the positioning rod can be pulled out from the insertion hole on the fastening tube by the movable block, and the fastening tube on the connecting plate can be quickly rotated out of the connector. This improves the connection stability of the heat exchange pipe connection structure while ensuring the convenience of disassembly and assembly of the heat exchange pipe connection structure.

[0013] 2. This heat exchange pipe connection structure features a protective shell fitted over the main pipe, with a protective layer, a buffer layer, an anti-permeability layer, and a composite layer inside the shell. The protective and buffer layers reduce the friction coefficient between the external environment and the geothermal well, while improving wear resistance and buffering performance. The anti-permeability layer within the buffer layer provides shielding and overall anti-permeability performance. The innermost anti-permeability layer, through the combination of glass fiber reinforced plastic and epoxy resin, effectively increases mechanical strength and adhesion to the main pipe, thus providing efficient protection for the heat pipe connection structure. The sleeved connection facilitates subsequent disassembly and replacement, ensuring the stability of the heat pipe connection structure and extending its overall service life. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0017] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B;

[0018] Figure 5 This is a top view of the connector of this utility model.

[0019] In the diagram: 1. Main tube; 101. First inner tube; 2. Protective shell; 3. Protective unit; 301. Protective layer; 302. Buffer layer; 303. Anti-permeability layer; 304. Composite layer; 4. Surface sleeve; 5. Connector; 501. First positioning hole; 6. Locking mechanism; 601. Turntable; 602. Limiting ring; 603. Bolt; 604. First magnetic block; 7. Movable groove; 701. Movable block; 702. Positioning rod; 8. Connecting plate; 801. Fastening tube; 802. Insertion hole; 803. Second magnetic block; 804. Second positioning hole; 805. Second inner tube; 9. Connecting tube. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to these embodiments.

[0021] Example 1

[0022] exist Figures 1-5The present invention relates to a heat exchange pipeline connection structure, comprising a main pipe body 1 and a connecting pipe 9. The main pipe body 1 is a J55 oilfield casing with a diameter of 273.1 mm and a wall thickness of 8.89 mm. A protective shell 2 is fitted over the main pipe body 1, and a protective unit 3 is installed inside the protective shell 2. The protective unit 3 consists of a protective layer 301, a buffer layer 302, an anti-permeability layer 303, and a composite layer 304 arranged sequentially from the outside to the inside. The protective layer 301 is made of graphene-modified silicon carbide ceramic material, providing superior wear resistance and, in conjunction with graphene, achieving electronic shielding to effectively inhibit electrochemical corrosion. The buffer layer 302 is made of shape memory alloy material and adopts a honeycomb porous structure. The honeycomb structure dissipates formation shear stress through plastic deformation, providing structural buffer protection. The anti-permeability layer 303 is made of aluminum foil material, effectively preventing external moisture and chemicals in the soil from penetrating into the casing. The composite layer 304 is made of epoxy resin and glass fiber reinforced plastic composite material. It is lightweight and high-strength, and has better impact resistance and pressure resistance. In combination with epoxy resin, it can be attached to the outside of the main body 1.

[0023] A surface sleeve 4 is provided at the top of the outer part of the main tube 1. A connector 5 is fixedly connected to the top of the surface sleeve 4. The connector 5 is hollow and open at the top. The main tube 1, the surface sleeve 4, and the connector 5 are sequentially fitted onto the outer wall of the first inner tube 101. An annular groove is provided around the outer wall of the connector 5. A locking mechanism 6 is provided in the annular groove. The locking mechanism 6 is used to lock the connector 5 to the fastening tube 801. The inner side of the connector 5 is evenly machined with several sets of movable grooves 7 in a 360° circumferential phase. Specifically, the locking mechanism 6 includes a turntable 601 set in the annular groove. Limiting grooves are machined on the upper and lower sides of the annular groove. Limiting rings 602 are fixedly connected to the upper and lower sides of the turntable 601. The limiting rings are set in the limiting grooves. The turntable 601 and the limiting rings 602 can rotate relative to the connector 5. A bolt 603 is horizontally installed through the side wall of the turntable 601. The end of the bolt 603 passes through the connector 5 and extends into the movable groove 7. When the bolt 603 passes through the turntable 601 and rotates into the connector 5, the position of the turntable 601 can be fixed. When the bolt 603 rotates out of the turntable 601, the turntable 601 can rotate. At the same time, the limiting rings 602 set at the top and bottom of the turntable 601 can increase the stability of the rotation of the turntable 601. Several sets of first magnetic blocks 604 are uniformly fixedly connected within the 360° phase of the inner wall of the turntable 601. The first magnetic blocks 604 are staggered from the bolts 603, and the number of first magnetic blocks 604 corresponds to the number of movable slots 7.

[0024] A connecting plate 8 is fixedly connected to the bottom end of the connecting pipe 9. The connecting pipe 9 and the connecting plate 8 are sleeved on the outer wall of the second inner pipe 805. The first inner pipe 101 and the second inner pipe 805 are connected together. Specifically, the first inner pipe 101 and the second inner pipe 805 are made of PE-RT pipe with an outer pipe diameter of 77.8 mm and a wall thickness of 8.05 mm, and an inner pipe diameter of 110 mm and a wall thickness of 10.00 mm. The first inner pipe 101 and the second inner pipe 805 are connected by heat fusion. A fastening pipe 801 is fixedly connected to the bottom end of the connecting plate 8. The fastening pipe 801 is inserted into the hollow position of the connecting piece 5. Several sets of insertion holes 802 are evenly distributed in the 360° circumferential phase on the outer wall of the fastening pipe 801. A second magnetic block 803 is provided inside the insertion hole 802. The magnetic force of the first magnetic block 604 is greater than that of the second magnetic block 803. A movable block 701 is slidably connected to one side of the movable groove 7. A positioning rod 702 is fixedly connected to the middle position of one side of the movable block 701. Both the movable block 701 and the positioning rod 702 are made of magnetic material. The positioning rod 702 corresponds to the insertion hole 802. When the insertion hole 802 on the fastening tube 801 is aligned with the positioning rod 703 on the connector 5, the positioning rod 703 can be inserted into the insertion hole 802 on the fastening tube 801 due to the magnetic force of the second magnetic block 803 in the insertion hole 802. When the first magnetic block 604 on the rotating mechanism 6 rotates and corresponds to the movable groove 7 in the connector 5, the movable block 702 can drive the positioning rod 703 to be pulled out from the insertion hole 802 on the fastening tube 801 due to the magnetic force of the first magnetic block 604, thus loosening the limiting connection on the fastening tube 801 and pulling the fastening tube 801 out of the connector 5.

[0025] Several sets of first positioning holes 501 are evenly distributed within a 360° phase on the connector 5. The first positioning holes 501 are offset from the sliding groove 7. Second positioning holes 804 are evenly distributed within a 360° phase on the connecting plate 8. The first positioning holes 501 and the second positioning holes 804 correspond to each other. When the connector 5 is connected to the connecting plate 8, the positions of the first positioning holes 501 on the connector 5 and the second positioning holes 804 on the connecting plate 8 are aligned. At this time, secondary reinforcement can be achieved by tightening the connector with threads.

[0026] The working principle of this utility model is as follows:

[0027] In use, firstly, the first inner tube 101 inside the main body 1 and the second inner tube 805 inside the connecting tube 9 are connected by heat fusion. Then, the fastening tube 801 at the bottom of the connecting plate 8 is inserted into the interior of the connector 5. When the fastening tube 801 is fully inserted into the connector 5, the insertion hole 802 on the fastening tube 801 is aligned with the position of the positioning rod 703 inside the connector 5. Then, the positioning rod 703 can be inserted into the insertion hole 802 on the fastening tube 801 due to the magnetic force of the second magnetic block 803, thus completing the fastening connection between the connector 5 and the connecting plate 8. Secondary fastening is performed by the threaded fasteners set in the first positioning hole 501 and the second positioning hole 804. When the pipe needs to be disassembled, the bolt 603 is turned out of the turntable 601, and the turntable 601 can rotate outside the connector 5. When the first magnetic block 604 is aligned with the movable groove 701 in the connector 5, the movable block 702 is attracted to one side of the turntable 601 due to the magnetic force of the first magnetic block 604. At this time, the movable block 702 can drive the positioning rod 703 to be pulled out from the insertion hole 802 on the fastening tube 801, and the fastening tube 801 is turned out from the top of the connector 5 to complete the separation of the connector 5 and the connector 8.

Claims

1. A heat exchange pipe connection structure, comprising a main pipe (1) and a connecting pipe (9), characterized in that: The main body (1) is covered with a protective shell (2). The top of the main body (1) is provided with a surface sleeve (4). The top of the surface sleeve (4) is fixedly connected with a connector (5). The connector (5) is hollow and open at the top. The main body (1), the surface sleeve (4), and the connector (5) are sequentially fitted onto the outer wall of the first inner tube (101). The bottom end of the connecting tube (9) is fixedly connected with a connecting disc (8). The bottom end of the connecting disc (8) is fixedly connected with a fastening tube (801) threadedly connected to the connector (5). The connecting tube (9) and the connecting disc (8) are fitted onto the outer wall of the second inner tube (805). The second inner tube (805) is connected to the first inner tube (101). The system also includes a locking mechanism (6). The locking mechanism (6) is used to lock the connector (5) and the fastening tube (801).

2. The heat exchange pipe connection structure according to claim 1, characterized in that: The protective shell (2) is provided with a protective unit (3), which consists of a protective layer (301), a buffer layer (302), an anti-permeability layer (303), and a composite layer (304) arranged sequentially from the outside to the inside.

3. The heat exchange pipe connection structure according to claim 2, characterized in that: The protective layer (301) is made of graphene-modified silicon carbide ceramic material, the buffer layer (302) is made of shape memory alloy material, the anti-permeability layer (303) is made of aluminum foil material, and the composite layer (304) is made of epoxy resin and glass fiber reinforced plastic composite material.

4. The heat exchange pipe connection structure according to claim 1, characterized in that: The locking mechanism (6) includes a turntable (601) rotatably connected to the outside of the connector (5). Limiting rings (602) are fixedly connected to the upper and lower sides of the turntable (601). The limiting rings (602) can rotate within the connector (5). Bolts (603) are horizontally inserted through the side wall of the turntable (601). The ends of the bolts (603) pass through the connector (5) and extend into the movable groove (7). Several sets of first magnetic blocks (6) are uniformly fixedly connected within a 360° phase on the inner wall of the turntable (601). 04), several sets of movable slots (7) are evenly distributed in the 360° phase on the connector (5), and the number of first magnetic blocks (604) corresponds to the number of movable slots (7); a movable block (701) is slidably connected to one side of the movable slot (7), and a positioning rod (702) is fixedly connected to the middle position of one side of the movable block (701). The outer wall of the fastening tube (801) is provided with a socket (802) corresponding to the positioning rod (702), and a second magnetic block (803) is fixedly connected to the inner side of the socket (802).

5. The heat exchange pipe connection structure according to claim 4, characterized in that: Both the movable block (701) and the positioning rod (702) are made of magnetic material, and the magnetic force of the first magnetic block (604) is greater than that of the second magnetic block (803).

6. The heat exchange pipe connection structure according to claim 1, characterized in that: The connector (5) has several sets of first positioning holes (501) evenly distributed within a 360° phase, and the connector (8) has several sets of second positioning holes (804) evenly distributed within a 360° phase. The first positioning holes (501) and the second positioning holes (804) are fixedly connected by threaded fasteners.

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