A geothermal heat insulation and constant-depth mining device

Abstract

The present invention discloses a geothermal heat insulation and fixed-depth mining device, which relates to the technical field of geothermal mining. It includes a geothermal well pipe. At the top of the inner surface of the geothermal well pipe, a wellhead hanger is fixedly connected. In the middle of the wellhead hanger, a production pipe is fixedly connected. The production pipe is divided into upper and lower parts in the geothermal well pipe. The outer surface of one end of the top production pipe located inside the geothermal well pipe 1 is sleeved with a heat preservation pump pipe. The lower end of the production pipe is fixedly connected with a geothermal heat pump. The top and bottom of the geothermal heat pump are respectively a water outlet and a water inlet, and the water outlet of the geothermal heat pump is communicated with the inside of the production pipe. Through the rotational movement and up-and-down movement of the cleaning brush, it can be inserted into the gaps of the filter screen through its deformation effect, and continuously push the sand and gravel in the gaps of the filter screen, achieving the effect of cleaning the sand and gravel on the filter screen, avoiding the phenomenon that the conventional horizontal brush filter screen cannot be effectively cleaned, and avoiding the problem that some fine sand and gravel block the filter screen, resulting in the situation that the filter screen cannot be effectively filtered.

Description

Technical Field

[0001] The present invention relates to the technical field of geothermal exploitation, and more particularly, to a geothermal insulation and fixed-depth exploitation device. Background Art

[0002] Geothermal resources refer to the thermal energy within the Earth. It is a clean and renewable energy source that can be used for various purposes such as power generation, heating, cooling, drying, and hot spring bathing. Medium-deep geothermal resources can be divided into two types: hydrothermal type and dry hot rock type, buried at depths of several hundred to several thousand meters underground. The hydrothermal type has natural fracture reservoirs, and for the dry hot rock type, a geothermal reservoir needs to be artificially constructed. Eventually, both are exploited to the ground in the form of hot water or steam for utilization, and generally, an electric pump is used for extraction. The electric pump is installed in the wellbore pump chamber section of the geothermal well. Due to the pressure-bearing capacity and installation diameter limitations of the electric pump, the geothermal electric pump needs to be installed in the shallow part of the wellbore, far from the geothermal reservoir. The hot water enters the wellbore from the reservoir and flows upward along the wellbore. After being pressurized and lifted by the electric pump, it is extracted to the wellhead through the pump pipe.

[0003] Generally, there are multiple layers in the geothermal reservoir, which is not conducive to the high-quality development and utilization of geothermal resources. When extracting geothermal water at different depths, water quality mixing and geothermal water cross-layer occur, and the stability of the geothermal water quality cannot be guaranteed. At the same time, geothermal water cross-layer will cause the sand and gravel in different depth strata to loosen, resulting in more sand and gravel in the geothermal water entering the geothermal well, and the sand and gravel will enter the electric pump, leading to the damage of the electric pump. Although there is a cyclone sand separator to separate the sand and gravel in the geothermal water at present, making the extracted geothermal water have less sand and gravel, there is still some sand and gravel entering the electric pump along with the geothermal water, which will also cause the damage of the electric pump. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a geothermal insulation and fixed-depth exploitation device.

[0005] The technical solution is as follows:

[0006] A geothermal insulation and fixed-depth mining device, including a geothermal well pipe. At the top of the inner surface of the geothermal well pipe, a wellhead hanger is fixedly connected. In the middle of the wellhead hanger, a top production pipe is fixedly connected. Inside the geothermal well pipe, a bottom production pipe is arranged. On the outer surface of the end of the top production pipe located inside the geothermal well pipe, a thermal insulation pump pipe is sleeved. At the lower end of the top production pipe, a geothermal pump is fixedly connected. The top and bottom of the geothermal pump are respectively a water outlet and a water inlet, and the water outlet of the geothermal pump is connected to the inside of the top production pipe. The bottom water inlet of the geothermal pump is fixedly connected with a suction cylinder. The outer surface of the suction cylinder is evenly provided with through holes. The top of the suction cylinder is connected to the water inlet of the geothermal pump. The bottom of the suction cylinder is fixedly connected with a motor. On the outer surface of the geothermal well pipe, a plurality of symmetric geothermal water inlets are provided. On the inner surface of the geothermal well pipe, a packer corresponding to the position of the geothermal water inlet is fixedly connected. One end of the packer facing the center of the geothermal well pipe is connected to the bottom production pipe, and the end of the packer away from the bottom production pipe is connected to the geothermal water inlet;

[0007] On the outer surface of the top production pipe, a canning cylinder is fixedly connected. The top of the canning cylinder is connected to the top production pipe. The geothermal pump is located inside the canning cylinder. At the bottom of the canning cylinder, a sand removal cylinder is fixedly connected. The bottom of the canning cylinder is connected to the sand removal cylinder. The bottom of the sand removal cylinder is connected to the bottom production pipe. Inside the sand removal cylinder, a cyclone sand remover is arranged. The bottom of the cyclone sand remover is connected to the bottom production pipe. The top of the cyclone sand remover is fixedly connected with a pipe cylinder. The bottom of the pipe cylinder is fixedly connected to the bottom of the motor. The output shaft of the motor extends into the inside of the pipe cylinder;

[0008] Inside the sand removal cylinder, a filtering component is arranged. The filtering component includes a fixed collar fixedly connected to the inner surface of the sand removal cylinder by bolts. On the outer surface of the pipe cylinder, a filtering frame is fixedly connected by bolts. On the fixed frame of the filtering frame, a plurality of filter sand meshes are arranged.

[0009] Furthermore, the filtering frame is composed of an inner ring, a fixed frame, and an outer ring in sequence from the inside out. The outer ring of the filtering frame is clamped inside the fixed collar. The upper surface of the filter sand mesh is flush with the upper surface of the fixed frame of the filtering frame.

[0010] Further, a rotating component is provided on the filter rack. The rotating component includes a rotating groove formed on the upper surface of the inner ring of the filter rack. A rotating ring is slidably connected in the rotating groove. A circle of convex teeth is provided on the inner surface of the rotating ring. A first ball is movably connected between the outer diameter surface of the rotating ring and the groove wall of the rotating groove. Two rotating plates are symmetrically and fixedly connected to the outer surface of the rotating ring. A first disk is fixedly connected to the outer surface of the motor output shaft. A plastic plate corresponding to the position of the first disk is provided on the tube. A rotating shaft is rotatably connected to the inner ring of the filter rack. A gear corresponding to the convex teeth of the rotating ring is fixedly connected to the outer surface of the rotating shaft. The gear meshes with the convex teeth of the rotating ring. A second disk corresponding to the position of the first disk is fixedly connected to the outer surface of the rotating shaft.

[0011] Further, a stable groove ring is fixedly connected to the upper surface of the outer ring of the filter rack. Rolling grooves are symmetrically formed on the upper and lower sides of the groove wall of the stable groove ring. The end of the rotating plate away from the rotating ring slides inside the stable groove ring. A rotating groove is formed at the end of the rotating plate located inside the stable groove ring. A second ball is movably connected in the rotating groove of the rotating plate. The second ball rolls in the rolling groove of the stable groove ring. A sealing ring is fixedly connected to the two rotating plates, and the sealing ring fits with the inner ring surface of the stable groove ring.

[0012] Further, a cleaning component is provided on the rotating plate. The cleaning component includes a spring fixedly connected to the lower surface of the rotating plate. A cleaning plate is fixedly connected to the bottom of the spring. A cleaning brush is fixedly connected to the lower surface of the cleaning plate. A movable block is fixedly connected to the upper surface of the cleaning plate. A fixed strip is fixedly connected to the top of the movable block.

[0013] Further, the cleaning brush is made of elastically deformable metal wires. A strip-shaped hole for the movable block to slide is formed on the rotating plate.

[0014] Further, a fluctuation component is provided on the fixed strip. The fluctuation component includes a connecting shaft fixedly connected to one end of the fixed strip close to the stable groove ring. A roller is rotatably connected to the end of the connecting shaft away from the fixed strip. A corrugated ring is fixedly connected to the upper surface of the stable groove ring. The roller abuts against the upper surface of the corrugated ring.

[0015] Further, a flapping component is provided on the rotating plate. The flapping component includes two groups of fixed rods fixedly connected to the left and right sides of the cleaning plate. Each group of fixed rods has two. A lifting rod is fixedly connected between the two fixed rods in each group. Flapping plates are hinged on both sides of the rotating plate. A lifting groove is formed in the middle of the flapping plate. The lifting rod slides inside the lifting groove.

[0016] Further, a collection component is provided at the bottom of the sand removal cylinder. The collection component includes sand discharge ports symmetrically opened at the bottom of the sand removal cylinder. A collection ring is slidably connected inside the sand removal cylinder. A plurality of drainage plates are uniformly and fixedly connected inside the collection ring. A collection box is fixedly connected to the bottom of the sand removal cylinder. A collection port corresponding to the position of the sand discharge port is opened on the upper surface of the collection box.

[0017] Further, a sand extraction pipe is fixedly connected to the outer surface of the collection box. The sand extraction pipe extends to the top of the geothermal well pipe, and one end of the sand extraction pipe located at the top of the geothermal well pipe is connected to an external sand extraction pump.

[0018] As described above, the beneficial effects of a geothermal heat preservation and depth-fixed extraction device in the present invention are as follows:

[0019] Through the filtering effect of the filter screen, a small part of the sand and gravel remaining in the geothermal water can be filtered to prevent the instability of geothermal water extraction caused by incomplete separation of sand and gravel, and at the same time, the extraction quality of geothermal water is improved;

[0020] Through the rotational movement and up-and-down movement of the cleaning brush, it can be inserted into the gaps of the filter screen through its deformation effect, and continuously push the sand and gravel in the gaps of the filter screen to achieve the effect of cleaning the sand and gravel on the filter screen, avoiding the phenomenon that the conventional horizontal brush cannot effectively clean the filter screen, and avoiding the problem that some fine sand and gravel block the filter screen and the filter screen cannot effectively filter;

[0021] The sand and gravel separated from the gaps of the filter screen will also be thrown around again by the swirling geothermal water, thereby preventing the sand and gravel from getting stuck on the filter screen and affecting the filtering efficiency of the filter screen, avoiding the reduction of the filtering efficiency of the filter screen and affecting the flow rate of geothermal water. Through cleaning, the flow rate of geothermal water can be increased, avoiding excessive heat loss caused by too slow flow rate, so that the geothermal water extracted from the ground can maintain a relatively high temperature when it reaches the utilization site, thereby improving the energy utilization efficiency of geothermal water;

[0022] When the flapping plate swings downward, it will flap the filter screen. Through the flapping of the flapping plate, the gap between the sand and gravel and the filter screen can be loosened, thereby facilitating the pushing of the above-mentioned cleaning brush, avoiding the problem that the sand and gravel are blocked too tightly in the gaps of the filter screen and cannot be cleaned, improving the cleaning efficiency of the cleaning brush, and facilitating quick cleaning;

[0023] Through the rotation of the drainage plate, the sand and gravel falling into the collection ring will be pushed, so that the sand and gravel can effectively enter the collection box through the sand discharge port and the collection port, avoiding the accumulation of sand and gravel inside the sand removal cylinder and affecting the subsequent separation of sand and gravel. In addition, the sand and gravel falling into the collection box are extracted by an external sand extraction pump, so that the sand and gravel are extracted to an external collection box on the ground through the sand extraction pipe, realizing the collection of sand and gravel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic three-dimensional view of the overall structure of the present invention;

[0025] Figure 2 Schematic three-dimensional sectional view of the overall structure of the present invention;

[0026] Figure 3 Schematic three-dimensional sectional view of the partial structure of the present invention;

[0027] Figure 4 For the present invention Figure 3 Enlarged schematic view of the structure at position A in the present invention;

[0028] Figure 5 For the present invention Figure 3 Enlarged schematic view of the structure at position B in the present invention;

[0029] Figure 6 Schematic three-dimensional view of components such as the motor, tube barrel, and cyclone sand remover of the present invention;

[0030] Figure 7 Schematic three-dimensional view of components such as the sand filter screen, second magnetic disk, and rotating ring of the present invention;

[0031] Figure 8 Schematic three-dimensional view of the partial structure of the cleaning component, fluctuation component, and flapping component of the present invention;

[0032] Figure 9 Schematic three-dimensional view of components such as the collection box and collection port of the present invention;

[0033] Figure 10 Schematic three-dimensional view of components such as the sand discharge port, collection ring, and drainage plate of the present invention.

[0034] Among them, the reference numerals in the present invention are:

[0035] 1. Geothermal well pipe; 11. Wellhead hanger; 12. Top production pipe; 122. Bottom production pipe; 13. Insulation pump pipe; 14. Geothermal pump; 15. Suction cylinder; 16. Motor;17. Geothermal water inlet; 18. Packer;

[0036] 2. Canned cylinder; 21. Sand removal cylinder; 22. Cyclone sand remover; 23. Tube barrel;

[0037] Filter component: 31. Fixed collar; 32. Filter rack; 33. Sand filter screen;

[0038] Rotating component: 41. Rotating groove; 42. Rotating ring; 43. First ball; 44. Rotating plate; 45. Stable groove ring; 46. Second ball; 47. First magnetic disk; 48. Plastic steel plate; 49. Rotating shaft; 410. Gear; 411. Second magnetic disk; 412. Sealing ring;

[0039] Cleaning components: 51, spring; 52, cleaning plate; 53, cleaning brush; 54, movable block; 55, fixed strip;

[0040] Fluctuation components: 61, connecting shaft; 62, roller; 63, corrugated ring;

[0041] Beating components: 71, fixed rod; 72, lifting rod; 73, beating plate; 74, lifting groove;

[0042] Collection components: 81, sand discharge port; 82, collection ring; 83, drainage plate; 84, collection box; 85, collection port; 86, sand extraction pipe. Specific implementation manners

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] The embodiments provided by the present invention will be elaborated in detail below:

[0045] As Figures 1 to 3 、 Figure 5 and Figure 6As shown in the figure, a geothermal insulation and depth-fixed exploitation device includes a geothermal well pipe 1. At the top of the inner surface of the geothermal well pipe 1, a wellhead hanger 11 is fixedly connected. In the middle of the wellhead hanger 11, a top production pipe 12 is fixedly connected. Inside the geothermal well pipe 1, a bottom production pipe 122 is arranged. A heat preservation pump pipe 13 is sleeved on the outer surface of one end of the top production pipe 12 inside the geothermal well pipe 1, which can minimize the heat loss in the process of extracting geothermal water. The lower end of the top production pipe 12 is fixedly connected with a geothermal heat pump 14. The top and bottom of the geothermal heat pump 14 are the water outlet and water inlet respectively, and the water outlet of the geothermal heat pump 14 is connected with the inside of the top production pipe 12. The bottom water inlet of the geothermal heat pump 14 is fixedly connected with a suction cylinder 15. Through holes are evenly arranged on the outer surface of the suction cylinder 15. The bottom of the suction cylinder 15 is closed, and the top of the suction cylinder 15 is connected with the water inlet of the geothermal heat pump 14. The bottom of the suction cylinder 15 is fixedly connected with a motor 16. At the lower part of the geothermal well pipe 1, a plurality of geothermal water inlets 17 arranged in a vertical linear array are opened on the outer surface corresponding to the bottom production pipe 122. A packer 18 corresponding to the position of the geothermal water inlet 17 is fixedly connected to the inner surface of the geothermal well pipe 1. One end of the packer 18 facing the center of the geothermal well pipe 1 is connected with the bottom production pipe 122, and the end of the packer 18 far from the bottom production pipe 122 is connected with the geothermal water inlet 17. The packer 18 seals the geothermal water inlets 17 at different positions, realizes the collection of geothermal water at different depths, avoids the mixing of water quality and the cross-layer of geothermal water, and ensures the stable quality of geothermal water;

[0046] A canned cylinder 2 is fixedly connected to the outer surface of the lower part of the top production pipe 12. The bottom of the heat preservation pump pipe 13 is fitted with the top surface of the canned barrel 2. The geothermal heat pump 14 is located inside the canned cylinder 2. The bottom of the canned cylinder 2 is an inverted funnel shape with an outward expansion. The bottom of the canned cylinder 2 is fixedly connected with a sand removal cylinder 21 through bolts. The bottom of the canned cylinder 2 is connected with the sand removal cylinder 21. The bottom of the sand removal cylinder 21 is funnel-shaped. The sand removal cylinder 21 is fixedly connected with the bottom production pipe 122. A cyclone sand remover 22 is arranged inside the sand removal cylinder 21. A stirring device is arranged in the cyclone sand remover 22 and a plurality of uniform strip holes are opened on the side wall of the cyclone sand remover 22. The sand removal cylinder 21 is connected with the bottom production pipe 122. Geothermal water enters the inside of the sand removal cylinder 21 through the bottom production pipe 122. The cyclone sand remover 22 is used to separate the sand and gravel in the geothermal water. A pipe cylinder 23 is fixedly connected to the top of the cyclone sand remover 22. The top of the pipe cylinder 23 is fixedly connected with the bottom of the motor 16 through bolts. The output shaft of the motor 16 passes through the pipe cylinder 23 and extends to the inside of the cyclone sand remover 22, and is connected with the stirring device of the cyclone sand remover 22 on the output shaft of the motor 16;

[0047] As Figures 3 to 7 shown, a filtering component for filtering sand and gravel is arranged inside the sand removal cylinder 21. The filtering component includes a fixed collar 31 fixedly connected to the inner surface of the sand removal cylinder 21 through bolts. A filtering frame 32 is fixedly connected to the outer surface of the pipe cylinder 23 through bolts. AsFigure 6 As shown, the filter rack 32 is composed of an inner ring, a fixed rack, and an outer ring in sequence. The fixed rack of the filter rack 32 is arranged in a circular array and fixedly connected to the lower part of the outer surface of the inner ring of the filter rack 32. One end of the fixed rack of the filter rack 32 far from the inner ring is fixedly connected to the lower part of the outer surface of the outer ring of the filter rack 32. The outer ring of the filter rack 32 is snap-fitted inside the fixed sleeve ring 31. A plurality of filter sand meshes 33 arranged in a circular array are provided on the fixed rack of the filter rack 32, and the upper surface of the filter sand mesh 33 is flush with the upper surface of the fixed rack of the filter rack 32.

[0048] As Figure 4 and Figure 5 and Figure 7 As shown, a rotating component for driving rotation is provided on the filter rack 32. The rotating component includes a rotating groove 41 opened on the upper surface of the inner ring of the filter rack 32. A rotating ring 42 is slidably connected in the rotating groove 41. Convex teeth arranged in a circular array are provided on the inner surface of the rotating ring 42. A first ball 43 is movably connected between the outer diameter surface of the rotating ring 42 and the groove wall of the rotating groove 41. The first ball 43 is used to reduce the friction when the rotating ring 42 slides in the rotating groove 41 and improve the smoothness of the rotation of the rotating ring 42. Two rotating plates 44 are symmetrically and fixedly connected to the outer surface of the rotating ring 42. The upper surface of the outer ring of the filter rack 32 extending out of the fixed sleeve ring 31 is fixedly connected with a stable groove ring 45. Rolling grooves are symmetrically opened on the upper and lower sides of the groove wall of the stable groove ring 45. One end of the rotating plate 44 far from the rotating ring 42 slides inside the stable groove ring 45. A rotating groove is opened at one end of the rotating plate 44 located inside the stable groove ring 45. A second ball 46 is movably connected in the rotating groove of the rotating plate 44. The second ball 46 rolls in the rolling groove of the stable groove ring 45. A sealing ring 412 is fixedly connected to the two rotating plates 44, and the sealing ring 412 is in contact with the inner ring surface of the stable groove ring 45. The sealing ring 412 can prevent too much geothermal water from entering the inside of the stable groove ring 45 and affecting the rolling of the second ball 46. A first magnetic disk 47 is fixedly connected to the outer surface of the output shaft of the motor 16. A plastic plate 48 corresponding to the position of the first magnetic disk 47 is provided on the tube 23. A rotating shaft 49 is rotatably connected to the inner ring of the filter rack 32. A gear 410 corresponding to the convex teeth of the rotating ring 42 is fixedly connected to the outer surface of the rotating shaft 49. The gear 410 meshes with the convex teeth of the rotating ring 42. A second magnetic disk 411 corresponding to the position of the first magnetic disk 47 is fixedly connected to the outer surface of the rotating shaft 49. The plastic plate 48 is made of polycarbonate material and has a relatively thin thickness, which is used to reduce the gap between the first magnetic disk 47 and the second magnetic disk 411 and will not block the magnetism between the first magnetic disk 47 and the second magnetic disk 411.

[0049] As Figure 5 、 Figure 7 and Figure 8As shown, a cleaning component for cleaning the sand in the filter screen 33 is provided on the rotating plate 44. The cleaning component includes a spring 51 fixedly connected to the lower surface of the rotating plate 44. The bottom of the spring 51 is fixedly connected to a cleaning plate 52. A cleaning brush 53 is fixedly connected to the lower surface of the cleaning plate 52. The cleaning brush 53 is made of elastically deformable metal wires and is used to insert into the gaps of the filter screen 33 to push the sand. A movable block 54 is fixedly connected to the upper surface of the cleaning plate 52. A strip-shaped hole for the movable block 54 to slide is formed on the rotating plate 44. A fixed strip 55 is fixedly connected to the top of the movable block 54.

[0050] As Figure 5 and Figure 8 shown, a wave component for making the cleaning brush 53 move up and down is provided on the fixed strip 55. The wave component includes a connecting shaft 61 fixedly connected to one end of the fixed strip 55 close to the stable groove ring 45. A roller 62 is rotatably connected to the end of the connecting shaft 61 away from the fixed strip 55. A corrugated ring 63 is fixedly connected to the upper surface of the stable groove ring 45. The roller 62 abuts against the upper surface of the corrugated ring 63.

[0051] As Figure 7 and Figure 8 shown, a flapping component for flapping the filter screen 33 is provided on the rotating plate 44. The flapping component includes two groups of fixed rods 71 fixedly connected to the left and right sides of the cleaning plate 52. Each group of fixed rods 71 has two. A lifting rod 72 is fixedly connected between the two fixed rods 71 in each group. Flapping plates 73 are hinged on both sides of the rotating plate 44. A lifting groove 74 is formed in the middle of the flapping plate 73. The lifting rod 72 slides inside the lifting groove 74.

[0052] As Figure 2 、 Figure 3 、 Figure 9 and Figure 10 shown, a collection component for collecting and separating the sand is provided at the bottom of the sand removal cylinder 21. The collection component includes sand discharge ports 81 symmetrically formed at the bottom of the sand removal cylinder 21. A collection ring 82 is slidably connected inside the sand removal cylinder 21. A plurality of drainage plates 83 are uniformly and fixedly connected inside the collection ring 82. A collection box 84 is fixedly connected to the bottom of the sand removal cylinder 21. A collection port 85 corresponding to the position of the sand discharge port 81 is formed on the upper surface of the collection box 84. A sand extraction pipe 86 is fixedly connected to the outer surface of the collection box 84. The sand extraction pipe 86 extends to the top of the geothermal well pipe 1, and the end of the sand extraction pipe 86 at the top of the geothermal well pipe 1 is connected to an external sand extraction pump.

[0053] Combining the above preferred embodiments, the following is the entire working process and working principle of the above embodiments:

[0054] Start the ground heat pump 14. After the ground heat pump 14 starts, it begins to pump geothermal water. The geothermal water enters the packer 18 from the geothermal water inlet 17, and then enters the bottom production pipe 122 from the packer 18. The existing controller controls the opening and closing of the packers 18 at different depths, so that the geothermal water at different depths enters the bottom production pipe 122, avoiding cross-layer caused by mining geothermal water at different depths. Then it enters the desanding cylinder 21 from the bottom production pipe 122. After starting the motor 16, it drives the cyclone desander 22 to operate, making the geothermal water entering the desanding cylinder 21 form a swirl. The geothermal water passes through the filter screen 33 and then enters the canning cylinder 2, and then enters the ground heat pump 14 from the water inlet of the ground heat pump 14 through the suction cylinder 15. Through the pumping of the ground heat pump 14, the geothermal water flows from the water outlet of the ground heat pump 14 to the top production pipe 12. During the flow of the above geothermal water, because the outside of the production pipe 12 is wrapped with a heat preservation pump pipe 13, it can heat-preserve the geothermal water entering the production pipe 12 and prevent heat loss of the geothermal water. Finally, the geothermal water is discharged from the top production pipe 12 to realize the mining of geothermal water. A storage tank or a reservoir can be externally connected to the top production pipe 12 to store the mined geothermal water.

[0055] The filtration component filters the geothermal water from which the sand and gravel have been separated:

[0056] Under the action of the cyclone desander 22, the geothermal water forms a swirl, so that the sand and gravel in the geothermal water diffuse around, realizing the separation of most of the sand and gravel. Most of the sand and gravel enter the inside of the collection ring 82 under the action of gravity. And due to the upward pumping action of the ground heat pump 14, the geothermal water flows upward. The geothermal water will carry a small part of the sand and gravel upward. Through the filtering action of the filter screen 33, the remaining small part of the sand and gravel in the geothermal water can be filtered, preventing the instability of geothermal water mining caused by incomplete separation of sand and gravel, and at the same time improving the mining quality of geothermal water;

[0057] The rotating component drives the cleaning component to rotate:

[0058] When the output shaft of the above motor 16 rotates, it will drive the first magnetic disk 47 to rotate, so that the rotation of the first magnetic disk 47 drives the second magnetic disk 411 to rotate through the magnetic field. The second magnetic disk 411 drives the rotating shaft 49 to rotate. The rotating shaft 49 drives the gear 410 to rotate. The gear 410 drives the rotating ring 42 to make a rotating slide in the rotating ring 4 itself. And when the rotating ring 42 slides, it can rotate more smoothly under the rolling of the first ball 43. During the rotation of the rotating ring 42, it will synchronously drive the rotating plate 44 to rotate. The rotating plate 44 will drive the second ball 46 to roll in the rolling groove of the stable groove ring 45 through the rotating groove, so as to realize the stability of the rotating plate 44 during the rotation process. And the rotating plate 44 drives the movable block 54 and the cleaning brush 53 to rotate synchronously. The cleaning brush 53 slides on the upper surface of the filter screen 33 during the rotation process.

[0059] The fluctuation component drives the cleaning component to clean the sand and gravel in the sand filter screen 33:

[0060] During the rotation of the movable block 54, the movable block 54 will drive the fixed bar 55 to rotate synchronously. The fixed bar 55 drives the roller 62 to roll on the corrugated ring 63 through the connecting shaft 61. Under the action of the corrugated shape of the corrugated ring 63, the roller 62 can be squeezed by the corrugated protrusions to drive the fixed bar 55, the movable block 54 and the cleaning plate 52 to move upward, and compress the spring 51. As the roller 62 continues to move to the depression of the corrugated shape, the spring 51 will contract and reset to pull the cleaning plate 52 to move downward. The cleaning plate 52 will drive the movable block 54 to move downward in the rotating plate 44, and the cleaning plate 52 will also drive the cleaning brush 53 to move downward at the same time, so that the cleaning brush 53 can be inserted into the gap of the sand filter screen 33. As the roller 62 continues to move, the cleaning plate 52 and the cleaning brush 53 will reciprocally move up and down. In this way, and because the cleaning brush 53 is made of metal wire with elastic deformation, when the cleaning brush 53 rotates and moves up and down, it can be inserted into the gap of the sand filter screen 33 through its deformation effect, and can continuously push and squeeze the sand and gravel in the gap of the sand filter screen 33, achieving the effect of cleaning the sand and gravel on the sand filter screen 33, avoiding the phenomenon that the conventional horizontal brush cannot effectively clean the sand filter screen 33, avoiding the problem that some fine sand and gravel block the sand filter screen 33 and cause the sand filter screen 33 to be unable to filter effectively, and the sand and gravel separated from the gap of the sand filter screen 33 will also be thrown around again by the swirling geothermal water, thereby preventing the sand and gravel from getting stuck on the sand filter screen 33 and affecting the filtering efficiency of the sand filter screen 33, avoiding the reduction of the filtering efficiency of the sand filter screen 33 and affecting the flow rate of the geothermal water. Through cleaning, the flow rate of the geothermal water can be increased, avoiding excessive heat dissipation due to too slow flow rate, so that the geothermal water mined from the ground can maintain a relatively high temperature when it reaches the utilization site, thereby improving the energy utilization efficiency of the geothermal water.

[0061] The cleaning component drives the flapping component to flap the sand filter screen 33:

[0062] In the above, the up and down movement of the cleaning plate 52 can drive the fixed rod 71 to move up and down. When the fixed rod 71 moves upward, it will drive the lifting rod 72 to move upward. The lifting rod 72 pushes the flapping plate 73 to rotate and lift upward by sliding inside the lifting groove 74. When the fixed rod 71 moves downward, it will squeeze the flapping plate 73 to swing downward and reset by the lifting rod 72 sliding inside the lifting groove 74. When the flapping plate 73 swings downward, it will flap the sand filter screen 33. Through the flapping of the flapping plate 73, the sand and gravel can be loosened between the sand filter screen 33, thus facilitating the pushing and squeezing of the cleaning brush 53 in the above, avoiding the problem that the sand and gravel are blocked too tightly in the gap of the sand filter screen 33 and cannot be cleaned, and improving the cleaning efficiency of the cleaning brush 53 for quick cleaning.

[0063] The collection component extracts the separated sand and gravel:

[0064] Due to the swirling effect of the hydrocyclone 22 on the geothermal water, the geothermal water will form a swirl inside the sand removal cylinder 21. The geothermal water will rotate upward inside the sand removal cylinder 21. When the geothermal water rotates, it will push the drainage plate 83. The drainage plate 83 will drive the collection ring 82 to rotate inside the sand removal cylinder 21. The rotation of the drainage plate 83 will push the sand and gravel falling into the collection ring 82, enabling the sand and gravel to effectively enter the collection box 84 through the sand discharge port 81 and the collection port 85, avoiding the accumulation of sand and gravel inside the sand removal cylinder 21 and affecting the subsequent separation of sand and gravel. In addition, an external sand pump is used to extract the sand and gravel falling into the collection box 84, so that the sand and gravel are extracted to the external collection box on the ground through the sand suction pipe 86, realizing the collection of sand and gravel.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A geothermal heat preservation and fixed depth mining device, comprising a geothermal well pipe (1), characterized in that: The top of the inner surface of the geothermal well pipe (1) is fixedly connected to a wellhead hanger (11), the middle of the wellhead hanger (11) is fixedly connected to a top extraction pipe (12), the interior of the geothermal well pipe (1) is provided with a bottom extraction pipe (122), the outer surface of the top extraction pipe (12) located at one end inside the geothermal well pipe (1) is sheathed with an insulation pump pipe (13), the lower end of the top extraction pipe (12) is fixedly connected to a geothermal pump (14), the top and bottom of the geothermal pump (14) are respectively a water outlet and a water inlet, and the water outlet of the geothermal pump (14) is connected to the interior of the top extraction pipe (12), and the bottom water inlet of the geothermal pump (14) is fixedly connected to a suction pipe. An inlet tube (15) is provided, the outer surface of the suction tube (15) is uniformly provided with through holes, the top of the suction tube (15) is connected to the water inlet of the geothermal pump (14), the bottom of the suction tube (15) is fixedly connected to a motor (16), the outer surface of the geothermal well pipe (1) is provided with a plurality of symmetrical geothermal water inlets (17), the inner surface of the geothermal well pipe (1) is fixedly connected to a packer (18) corresponding to the position of the geothermal water inlet (17), the end of the packer (18) facing the center of the geothermal well pipe (1) is connected to the bottom production pipe (122), and the end of the packer (18) away from the bottom production pipe (122) is connected to the geothermal water inlet (17); The outer surface of the top production pipe (12) is fixedly connected to a canning barrel (2), the top of the canning barrel (2) is connected to the top production pipe (12), the geothermal pump (14) is located inside the canning barrel (2), the bottom of the canning barrel (2) is fixedly connected to a desanding barrel (21), the bottom of the canning barrel (2) is connected to the desanding barrel (21), the bottom of the desanding barrel (21) is connected to the bottom production pipe (122), a cyclone desander (22) is provided inside the desanding barrel (21), the bottom of the cyclone desander (22) is connected to the bottom production pipe (122), the top of the cyclone desander (22) is fixedly connected to a tube (23), the top of the tube (23) is fixedly connected to the bottom of the motor (16), and the output shaft of the motor (16) extends to the inside of the tube (23); A filter assembly is provided inside the sand removal cylinder (21), and the filter assembly includes a fixed collar (31) fixedly connected to the inner surface of the sand removal cylinder (21) by bolts, and a filter frame (32) is fixedly connected to the outer surface of the tube (23) by bolts, and a plurality of sand filter nets (33) are provided on the fixed frame of the filter frame (32); the filter frame (32) is composed of an inner ring, a fixed frame and an outer ring in sequence outward; a rotating assembly is provided on the filter frame (32), and the rotating assembly includes a rotating groove (41) provided on the upper surface of the inner ring of the filter frame (32), and a rotating ring (41) is slidably connected in the rotating groove (41). 2), the inner surface of the rotating ring (42) is provided with a circle of convex teeth, the outer surface of the rotating ring (42) is symmetrically fixedly connected to two rotating plates (44), the inner ring of the filter frame (32) is rotatably connected to a rotating shaft (49), the outer surface of the rotating shaft (49) is fixedly connected to a gear (410) corresponding to the position of the convex teeth of the rotating ring (42), the gear (410) is meshed with the convex teeth of the rotating ring (42), and the upper surface of the outer ring of the filter frame (32) is fixedly connected to a stabilizing groove ring (45); a cleaning assembly is provided on the rotating plate (44), and the cleaning assembly includes a fixedly connected to the rotating plate (44) A spring (51) is provided on the lower surface, the bottom of the spring (51) is fixedly connected to a cleaning plate (52), the lower surface of the cleaning plate (52) is fixedly connected to a cleaning brush (53), the upper surface of the cleaning plate (52) is fixedly connected to a movable block (54), the top of the movable block (54) is fixedly connected to a fixed bar (55); a wave assembly is provided on the fixed bar (55), the wave assembly includes a connecting shaft (61) fixedly connected to one end of the fixed bar (55) close to the stable groove ring (45), a roller (62) is rotatably connected to the end of the connecting shaft (61) away from the fixed bar (55), and the stable groove ring The upper surface of (45) is fixedly connected with a corrugated ring (63), and the roller (62) contacts the upper surface of the corrugated ring (63); a flapping assembly is provided on the rotating plate (44), and the flapping assembly includes two groups of fixed rods (71) fixedly connected to the left and right sides of the cleaning plate (52), each group of the fixed rods (71) is provided with two, and a lifting rod (72) is fixedly connected between the two fixed rods (71) in each group, and flapping plates (73) are hinged on both sides of the rotating plate (44), and a lifting groove (74) is provided in the middle of the flapping plate (73), and the lifting rod (72) slides inside the lifting groove (74).

2. The geothermal heat preservation and fixed depth mining device according to claim 1, characterized in that: The outer ring of the filter frame (32) is clamped inside the fixed collar (31), and the upper surface of the sand filter screen (33) is flush with the upper surface of the filter frame (32) fixing frame.

3. The geothermal heat preservation and fixed depth mining device according to claim 2, characterized in that: A first ball (43) is movably connected between the outer diameter surface of the rotating ring (42) and the groove wall of the rotating groove (41); a first magnetic disk (47) is fixedly connected to the outer surface of the output shaft of the motor (16); a plastic plate (48) corresponding to the position of the first magnetic disk (47) is provided on the tube (23); and a second magnetic disk (411) corresponding to the position of the first magnetic disk (47) is fixedly connected to the outer surface of the rotating shaft (49).

4. The geothermal heat preservation and fixed depth mining device according to claim 3, characterized in that: The groove wall of the stable groove ring (45) is symmetrically provided with rolling grooves on the upper and lower sides. The end of the rotating plate (44) away from the rotating ring (42) slides inside the stable groove ring (45). The end of the rotating plate (44) located inside the stable groove ring (45) is provided with a rotation groove. A second ball (46) is movably connected in the rotation groove of the rotating plate (44). The second ball (46) rolls in the rolling groove of the stable groove ring (45). A sealing ring (412) is fixedly connected to the two rotating plates (44), and the sealing ring (412) is in contact with the inner ring surface of the stable groove ring (45).

5. The geothermal heat preservation and fixed depth mining device according to claim 4, characterized in that: The cleaning brush (53) is a metal wire with elastic deformation, and the rotating plate (44) is provided with a strip hole for the movable block (54) to slide.

6. The geothermal heat preservation and fixed depth mining device according to claim 5, characterized in that: A collecting assembly is provided at the bottom of the sand removal cylinder (21), and the collecting assembly includes a sand discharge port (81) symmetrically opened at the bottom of the sand removal cylinder (21); a collecting ring (82) is slidably connected to the interior of the sand removal cylinder (21); a plurality of guide plates (83) are evenly fixedly connected to the interior of the collecting ring (82); a collecting box (84) is fixedly connected to the bottom of the sand removal cylinder (21); and a collecting port (85) corresponding to the position of the sand discharge port (81) is opened on the upper surface of the collecting box (84).

7. The geothermal heat preservation and fixed depth mining device according to claim 6, characterized in that: A sand pumping pipe (86) is fixedly connected to the outer surface of the collecting box (84), and the sand pumping pipe (86) extends to the top of the geothermal well pipe (1), and one end of the sand pumping pipe (86) located at the top of the geothermal well pipe (1) is connected to an external sand pumping pump.

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