A kind of geothermal hole fixing device auxiliary installation support that only takes heat not water

Abstract

The utility model relates to a geothermal energy development technical field especially relates to a kind of only take hot and not take water geothermal hole hole fixing device auxiliary installation support, including base frame, the surface of base frame is provided with the through hole of threading casing pipe, two groups of connecting frames are symmetrically arranged in the lower end of base frame, one end of two groups of connecting frames is provided with a group of positioning blocks, the side of two groups of connecting frames is fixedly connected with a group of internal thread sleeve, bidirectional lead screw is rotatably connected in the inside of base frame, bidirectional lead screw is penetrated two groups of internal thread sleeve and is connected with it threadedly, the hand wheel is fixedly installed in the end of bidirectional lead screw, and the other side of connecting frame is provided with guide mechanism;The utility model can be driven two groups of connecting frames under the guidance of guide mechanism by internal thread sleeve driving bidirectional lead screw rotation, drive two groups of positioning blocks synchronous stable opposite or back sliding, so that two groups of positioning blocks adhere to the outer wall of casing pipe, even force is applied from both sides, effectively prevent its deflection, centring accuracy is high, and stability is good.

Description

Technical Field

[0001] This utility model relates to the field of geothermal energy development technology, and in particular to an auxiliary installation bracket for a geothermal borehole solidification device that extracts heat but not water. Background Technology

[0002] Geothermal energy, as a renewable energy source with abundant reserves, wide distribution, and stable reliability, is increasingly valued for development and utilization with technological advancements. In particular, the "heat extraction without water extraction" technology for medium-deep geothermal energy involves installing casing strings in boreholes thousands of meters underground and effectively sealing them in the annular space between the casing strings and the strata or outer casing. This, combined with the circulation medium, allows for efficient heat exchange with the soil and rock layers in a closed pipeline, achieving efficient and environmentally friendly extraction of geothermal energy without disturbing the groundwater system. This fully demonstrates the technological innovation and eco-friendliness of clean energy development.

[0003] In the critical process of initial alignment and temporary fixation of the casing string at the geothermal wellhead, the currently commonly used simple tripod combined with hand-operated hoists, or the operation method of workers supporting it by hand, has obvious technical limitations. Not only is it difficult to guarantee alignment accuracy, but it also makes it easy for the heat exchanger to deviate from the center of the wellbore during the process of lowering it thousands of meters, causing continuous friction with the well wall, which can easily cause wear on the anti-corrosion layer of the heat exchanger's outer wall, and even lead to the risk of casing jamming, directly affecting construction efficiency and equipment safety.

[0004] Therefore, to address the aforementioned issues, an auxiliary installation bracket for a geothermal wellbore fixing device that extracts heat but not water can be designed. Through a bidirectional screw synchronous centering drive structure, coupled with a positioning block that matches the casing shape, the casing can be quickly, accurately, and stably centered at the wellhead. This effectively avoids the accuracy deviation problems of traditional manual centering and can continuously and stably ensure that the casing maintains its axial center position during subsequent lowering, avoiding the risk of well wall friction and jamming caused by deviation. This provides reliable technical support for the safe and efficient installation of geothermal heat exchange systems. Utility Model Content

[0005] To overcome the problem that the traditional simple tripod and hand-operated hoist operation mode, or the operation mode in which workers support the casing string by hand, are difficult to guarantee the alignment accuracy in the critical process of initial alignment and temporary fixation of the casing string at the geothermal orifice, in order to overcome the problem that the alignment accuracy is difficult to guarantee in the critical process of initial alignment and temporary fixation of the casing string at the geothermal orifice, in the operation mode of initial alignment and temporary fixation of the casing string.

[0006] The technical solution of this utility model is as follows: an auxiliary installation bracket for a geothermal hole solidification device that only extracts heat and not water, including a base frame, the surface of which is provided with through holes for inserting sleeves, and two sets of connecting frames symmetrically arranged at the lower end of the base frame. Each set of connecting frames has a set of positioning blocks at one end, and a set of internal threaded sleeves is fixedly connected to one side of each set of connecting frames. A bidirectional screw is rotatably connected inside the base frame, the bidirectional screw passes through the two sets of internal threaded sleeves and is threadedly connected to them, a handwheel is fixedly installed at one end of the bidirectional screw, and a guide mechanism is provided on the other side of the connecting frame.

[0007] Preferably, by rotating the handwheel to drive the bidirectional lead screw to rotate, the two sets of connecting frames can be driven by the internal threaded sleeve under the guidance of the guide mechanism, which drives the two sets of positioning blocks to slide synchronously and stably in opposite directions or in opposite directions. This allows the two sets of positioning blocks to fit against the outer wall of the sleeve, applying force evenly from both sides, effectively preventing its deviation, and achieving high centering accuracy and good stability.

[0008] Preferably, the positioning block is fixedly connected to one end of the connecting frame.

[0009] Preferably, the guiding mechanism includes a sliding sleeve and a guide rod. The sliding sleeve is fixedly installed on one side of the connecting frame, and the guide rod is fixedly installed inside the base frame. The guide rod passes through the sliding sleeve and is slidably connected to it.

[0010] Preferably, the lower end of the base frame is fixedly connected to four sets of support legs, and each set of support legs is internally threaded with a set of threaded feet.

[0011] Preferably, the connecting frame is rotatably connected to a rotating shaft, and a connecting block is fixedly installed on the periphery of the rotating shaft, with the connecting block being fixedly connected to the positioning block.

[0012] Preferably, the connection between the rotating shaft and the connecting frame is damped.

[0013] Preferably, one side of the positioning block has an arc-shaped structure, and the surface of the arc-shaped structure of the positioning block is coated with a ceramic wear-resistant coating.

[0014] The beneficial effects of this utility model are:

[0015] By rotating the handwheel to drive the bidirectional lead screw, the two sets of connecting frames are driven by the internal threaded sleeve. Under the guidance of the guiding mechanism, the two sets of positioning blocks slide synchronously and stably towards or away from each other. This ensures that the two sets of positioning blocks are in contact with the outer wall of the casing, applying force evenly from both sides, effectively preventing deflection. This provides high centering accuracy and good stability, ensuring the casing remains axially centered throughout the subsequent lowering process, avoiding the risk of wellbore friction and jamming caused by deflection. The movable design of the positioning blocks can adapt to different specifications of casing strings, effectively improving versatility and on-site operational efficiency. Attached Figure Description

[0016] Figure 1 The diagram shown is a top-view perspective of the auxiliary installation bracket of the geothermal hole fixing device that only extracts heat and does not extract water according to this utility model.

[0017] Figure 2 The diagram shown is a bottom-view three-dimensional structural schematic of the auxiliary installation bracket of the geothermal hole solidification device that only extracts heat and does not extract water according to this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional view of the auxiliary installation bracket of the geothermal hole solidification device that only extracts heat and does not extract water according to this utility model.

[0019] Figure 4 The diagram shown is a three-dimensional structural schematic of an auxiliary installation bracket for a geothermal hole fixing device that extracts heat but not water, according to embodiment 2 of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Base frame; 101. Through hole; 2. Connecting bracket; 201. Internal threaded sleeve; 202. Sliding sleeve; 3. Positioning block; 4. Two-way lead screw; 401. Handwheel; 5. Guide rod; 6. Support leg; 601. Threaded support foot; 7. Rotating shaft; 701. Connecting block. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Example 1

[0023] Please see Figure 1 and Figure 2This utility model provides an embodiment of an auxiliary installation bracket for a geothermal hole fixing device that only extracts heat and not water. It includes a base frame 1 with through holes 101 for inserting sleeves on its surface. It also includes two sets of connecting brackets 2 symmetrically arranged at the lower end of the base frame 1. Each set of connecting brackets 2 has a positioning block 3 at one end. Each set of connecting brackets 2 has a set of internally threaded sleeves 201 fixedly connected to one side. A bidirectional screw 4 is rotatably connected inside the base frame 1, passing through and threadedly connecting to the two sets of internally threaded sleeves 201. A handwheel 401 is fixedly installed at one end of the bidirectional screw 4, and a guide mechanism is provided on the other side of the connecting brackets 2. Rotating the handwheel 401 drives... The rotation of the bidirectional lead screw 4 drives the two sets of connecting frames 2 through the internal threaded sleeve 201. Under the guidance of the guiding mechanism, the two sets of positioning blocks 3 slide synchronously and stably towards or away from each other, so that the two sets of positioning blocks 3 fit against the outer wall of the sleeve and apply force evenly from both sides, effectively preventing its deviation, with high centering accuracy and good stability. The positioning block 3 is fixedly connected to one end of the connecting frame 2. One side of the positioning block 3 is an arc-shaped structure, and the surface of the arc-shaped structure of the positioning block 3 is coated with a ceramic wear-resistant coating. The arc-shaped structure of the positioning block 3 fits tightly against the outer wall of the sleeve. The ceramic wear-resistant coating effectively improves the wear resistance of the contact surface, extends the service life of the positioning block 3, and reduces scratch damage to the surface of the sleeve, ensuring a stable and reliable clamping process.

[0024] Please see Figure 1 and Figure 3 In this embodiment, the guiding mechanism includes a sliding sleeve 202 and a guide rod 5. The sliding sleeve 202 is fixedly installed on one side of the connecting frame 2, and the guide rod 5 is fixedly installed inside the base frame 1. The guide rod 5 passes through the sliding sleeve 202 and is slidably connected to it. Four sets of support legs 6 are fixedly connected to the lower end of the base frame 1. Each set of support legs 6 has a set of threaded feet 601 threadedly connected inside. By sliding the sliding sleeve 202 in cooperation with the guide rod 5, the movement of the connecting frame 2 can be stably guided, ensuring that the positioning block 3 can stably position the sleeve. The base frame 1 is supported and installed above the geothermal hole by the support legs 6, so that the through hole 101 corresponds to the geothermal hole. By setting the threaded feet 601 to rotate inside the support legs 6, the base frame 1 can be leveled, ensuring that the positioning block 3 can stably position the lowered sleeve.

[0025] Example 2

[0026] Please see Figure 4The difference from Embodiment 1 is that, in this embodiment, the connecting frame 2 is rotatably connected to a rotating shaft 7, and a connecting block 701 is fixedly installed on the periphery of the rotating shaft 7. The connecting block 701 is fixedly connected to the positioning block 3. The connection between the rotating shaft 7 and the connecting frame 2 is damped. The positioning block 3 is connected to the connecting frame 2 through the cooperation of the rotating shaft 7 and the connecting block, so that the positioning block 3 has a certain angle adjustment capability. Even if there is a slight deviation in the initial installation, the clamping mechanism can adjust the angle to ensure that its clamping surface is fully in contact with the outer tube wall of the coaxial heat exchanger, and to ensure the stability of the positioning block 3 in the centering position of the sleeve.

[0027] Through the above steps, by rotating the handwheel 401 to drive the bidirectional lead screw 4 to rotate, the two sets of connecting frames 2 can be driven by the internal threaded sleeve 201 under the guidance of the guiding mechanism, and the two sets of positioning blocks 3 can be driven to slide synchronously and stably towards or away from each other, so that the two sets of positioning blocks 3 are in contact with the outer wall of the casing, and force is applied evenly from both sides, effectively preventing its deviation, with high centering accuracy and good stability. This solves the problem that the traditional simple tripod and hand-operated hoist operation mode or the operation mode of workers supporting it by hand is difficult to guarantee centering accuracy in the key process of initial centering and temporary fixation of the casing string at the geothermal orifice.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An auxiliary installation bracket for a geothermal borehole fixing device that extracts heat but not water, comprising a base frame (1), wherein the surface of the base frame (1) is provided with a through hole (101) for inserting a sleeve, characterized in that: It also includes two sets of connecting frames (2) symmetrically arranged at the lower end of the base frame (1). Each set of connecting frames (2) has a set of positioning blocks (3) at one end. Each set of connecting frames (2) has a set of internal threaded sleeves (201) fixedly connected to one side. The base frame (1) is rotatably connected to a two-way screw (4). The two-way screw (4) passes through the two sets of internal threaded sleeves (201) and is threadedly connected to them. A handwheel (401) is fixedly installed at one end of the two-way screw (4). A guide mechanism is provided on the other side of the connecting frame (2).

2. The auxiliary installation bracket for a geothermal borehole fixing device that only extracts heat and not water, as described in claim 1, is characterized in that: The positioning block (3) is fixedly connected to one end of the connecting frame (2).

3. The auxiliary installation bracket for a geothermal borehole fixing device that only extracts heat and not water, as described in claim 1, is characterized in that: The guiding mechanism includes a sliding sleeve (202) and a guide rod (5). The sliding sleeve (202) is fixedly installed on one side of the connecting frame (2), and the guide rod (5) is fixedly installed inside the base frame (1). The guide rod (5) passes through the sliding sleeve (202) and is slidably connected to it.

4. The auxiliary installation bracket for a geothermal borehole fixing device that only extracts heat and not water, as described in claim 1, is characterized in that: The lower end of the base frame (1) is fixedly connected to four sets of support legs (6), and each set of support legs (6) is threadedly connected to a set of threaded feet (601).

5. The auxiliary installation bracket for a geothermal borehole fixing device that only extracts heat and not water, as described in claim 1, is characterized in that: The connecting frame (2) is internally connected to a rotating shaft (7), and a connecting block (701) is fixedly installed on the periphery of the rotating shaft (7). The connecting block (701) is fixedly connected to the positioning block (3).

6. The auxiliary installation bracket for a geothermal borehole fixing device that only extracts heat and not water, as described in claim 5, is characterized in that: The connection between the rotating shaft (7) and the connecting frame (2) is damped.

7. An auxiliary installation bracket for a geothermal borehole fixing device that only extracts heat and not water, as described in claim 2 or 5, characterized in that: One side of the positioning block (3) is an arc surface structure, and the surface of the arc surface structure of the positioning block (3) is provided with a ceramic wear-resistant coating.

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