A geothermal tail water recharge device and a recharge method

Abstract

The present invention discloses a geothermal tail water recharge device, specifically relating to the technical field of geothermal tail water recharge. The device includes a recharge bin, an elastic expansion sleeve, a strip-shaped groove, a filter bag, a fixing ring, a rotating shaft, and a spline sleeve. The rotating shaft coaxially and slidably penetrates into the spline sleeve and is spline-connected to the spline sleeve; a rotating assembly for driving the rotation of the rotating shaft. The rotating shaft is driven to rotate by the rotating assembly. When the rotating shaft rotates, it will drive the spline sleeve to rotate. Since the spline sleeve is fixedly connected to the filter bag, the lower end of the filter bag can be driven to curl and constrict around the axis of the filter bag, so that the filter bag squeezes the sludge stored inside it, compacts the sludge. At the same time, when the filter bag tightens, it can wrap the sludge to a certain extent, making the sludge not easily stirred up by the water flow, thereby reducing the phenomenon of blockage of the filter bag. In addition, the constriction of the filter bag is self-triggered and does not require manual intervention.

Description

Technical Field

[0001] The present invention relates to the technical field of geothermal tail water recharge, and more specifically, to a geothermal tail water recharge device and a recharge method. Background Art

[0002] Geothermal energy is renewable heat energy from deep within the earth, which originates from the molten magma of the earth and the decay of radioactive substances. After the deep circulation of groundwater and the intrusion of magma from extremely deep depths into the earth's crust, heat is brought from deep underground to the near surface. Humans bring geothermal energy to the surface in the form of geothermal water or steam by drilling geothermal wells for utilization. Currently, it has been widely used in geothermal power generation, heating, greenhouses, aquaculture, rehabilitation medicine, extraction of chemical raw materials, tourism, and bottled mineral water, etc. The extraction volume is increasing day by day, and most of the geothermal water after extracting heat energy is discharged to the surface, causing thermal pollution and chemical pollution. At the same time, it has led to a gradual decline in the static water level of geothermal wells. If this continues, it will surely cause waste of geothermal water and lead to the exhaustion of geothermal water. As is well known, geothermal water, as the only medium for developing deep geothermal energy, is restricted by the head of the submersible pump and economy. When the water level burial depth drops below a certain depth, it is no longer economically meaningful to extract geothermal energy, and at this time, the utilized heat energy only accounts for a few ten-thousandths of the total heat storage in the heat reservoir. In order to avoid thermal pollution and chemical pollution caused by direct discharge of geothermal wastewater and to maintain the heat reservoir pressure, it is necessary to recharge geothermal tail water.

[0003] After retrieval, Chinese Patent Publication No. CN113559586A discloses a geothermal tail water recharge device, which relates to the technical field of geothermal water wells. It includes a filter, a water pump, and a recharge pipe connected in sequence through pipelines; the filter includes a filtering chamber, a filter bag cage is clamped in the filtering chamber, and a filter bag is wrapped outside the filter bag cage; a sealing cover is arranged at the top of the filtering chamber, a tail water inlet pipe is arranged on the side wall of the filtering chamber, and the filter bag cage is located below the tail water inlet pipe; a plurality of purified water outlet pipes are uniformly arranged circumferentially on the side wall of the filtering chamber, the ends of the plurality of purified water outlet pipes are connected to a water collection chamber, a main outlet pipe is arranged on the water collection chamber, and the main outlet pipe is connected to the inlet of the water pump; the axis of the purified water outlet pipe does not intersect with the axis of the filtering chamber; the axis of the purified water outlet pipe is located in the middle of the filter bag cage; a turbine is rotatably arranged in the recharge pipe.

[0004] When the above-mentioned geothermal tail water recharge device in the prior art performs recharge, the filter bag (referred to as the filter bag in this application) is used to filter solid foreign matters in the geothermal tail water to achieve the separation of geothermal tail water and solid foreign matters. Since the filter holes of the filter bag are usually small, after a long time of filtration, some silt will accumulate inside the filter bag. When the silt is stirred by the water flow, it will be stirred up, which is likely to block the filter holes of the filter bag. And during recharge, the staff cannot clean the silt, resulting in the silt affecting the filtration and separation efficiency of the filter bag. Summary of the Invention

[0005] To overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a geothermal tail water recharge device and a recharge method. The technical problem to be solved by the present invention is that after the filter bag in the existing geothermal tail water recharge device accumulates silt and is stirred up by the water flow, it is easy to block the filter bag.

[0006] To achieve the above object, the present invention provides the following technical solution: A geothermal tail water recharge device includes a recharge bin with a hollow interior. A water inlet pipe is installed at the top of the recharge bin and it also has a water outlet pipe. It further includes:

[0007] An elastic expansion sleeve coaxially connected to one end of the water inlet pipe extending into the recharge bin. The outer diameter of the elastic expansion sleeve increases sequentially from top to bottom, and a plurality of strip-shaped grooves in the form of notches are formed on the elastic expansion sleeve;

[0008] A filter bag with an opening detachably connected to the largest outer diameter end of the elastic expansion sleeve;

[0009] A mounting rack fixedly connected inside the recharge bin. The mounting rack is coaxially and fixedly connected with a fixing ring;

[0010] A rotating shaft coaxially and rotatably connected to the fixing ring. A spline sleeve is installed at the bottom of the filter bag. The rotating shaft coaxially slides into the spline sleeve and is spline-connected to the spline sleeve;

[0011] A rotating assembly for driving the rotation of the rotating shaft.

[0012] Preferably, a water pump is installed on the water outlet pipe, and a recharge pipe is installed at the water outlet of the water pump.

[0013] Preferably, a scroll spring is installed inside the fixing ring, and both ends of the scroll spring are fixedly connected to the inner hole wall of the fixing ring and the rotating shaft respectively.

[0014] Preferably, the rotating assembly includes:

[0015] A rotating disk coaxially connected to one end of the rotating shaft extending into the filter bag. The outer diameter of the rotating disk increases sequentially from top to bottom;

[0016] A plurality of blades rotatably connected to the rotating disk through mounting pivots;

[0017] A driving unit for driving the rotation of the pivot.

[0018] Preferably, the plurality of blades are arranged in an axial array along the rotating disk.

[0019] Preferably, the driving unit includes:

[0020] A first bevel gear fixedly sleeved on one end of the pivot penetrating into the rotating disc, and an installation space for installing a plurality of the first bevel gears is formed in the rotating disc;

[0021] A driving rod coaxially and rotatably connected inside the rotating shaft and having an upper end penetrating into the installation space;

[0022] A second bevel gear sleeved on the upper end of the driving rod, and the second bevel gear meshes with a plurality of the first bevel gears together;

[0023] A rotating mechanism for driving the driving rod to rotate.

[0024] Preferably, the rotating mechanism includes:

[0025] A floating plate slidably sleeved on the rotating shaft, a connecting rod is horizontally and fixedly connected to the floating plate, a waist-shaped hole for inserting the connecting rod and capable of freely sliding up and down is formed in the rotating shaft, and the outer diameter dimension of the floating plate is smaller than the outer diameter dimension of the rotating disc;

[0026] A sliding sleeve fixedly connected to the connecting rod, and a sliding cavity for the sliding sleeve to move freely is formed inside the rotating shaft;

[0027] A driving column coaxially connected to the lower end of the driving rod, a ball is rotatably embedded at the lower end of the driving column, a jack for the driving column to telescopically insert is formed in the sliding sleeve, and a spiral rolling groove for the ball to engage and capable of freely rotating is formed in the inner wall of the jack.

[0028] A recharging method of a geothermal tail water recharging device includes: [[ID=;25]]

[0029] Geothermal tail water is transported to the water inlet pipe by a delivery pump, then flows into the filter bag from the water inlet pipe, and the geothermal tail water is filtered by the filter holes of the filter bag. In the initial state, there is less silt in the filter bag, so that the permeability of the filter bag is not affected. At this time, the liquid level in the filter bag is relatively low, the floating plate is not affected by buoyancy, so that the driving rod is in a static state, and at this time, the thickness direction of the blade is perpendicular to the axial direction of the driving rod, so that when the geothermal tail water flowing into the filter bag from the water inlet pipe impacts the blade, it will not cause the blade to drive the rotating disc to rotate. After the geothermal tail water is filtered by the filter bag, it will accumulate in the recharging bin. As the liquid level of the accumulated geothermal tail water rises, it will enter the water pump from the water outlet pipe, the water pump is started, the geothermal tail water in the water outlet pipe is transported to the recharging pipe, and then transported to the underground geothermal layer through the recharging pipe to realize the recharging of the geothermal tail water;

[0030] As the geothermal tail water continuously enters the filter bag for filtration, the sludge in the filter bag will accumulate more and more, affecting the permeability of the filter bag. As a result, the water flow pressure inside and outside the filter bag becomes inconsistent, causing the liquid level of the geothermal tail water in the filter bag to gradually rise. As the liquid level rises, the liquid surface of the geothermal tail water in the filter bag will approach the floating plate until it lifts the floating plate. Affected by the buoyancy, the floating plate moves upward, driving the connecting rod and the sliding sleeve to move upward. When the sliding sleeve moves upward, the ball will roll in the spiral rolling groove, causing the driving column to rotate. Since the driving rod is rotatably connected to the rotating shaft, the driving rod rotates synchronously, causing the second bevel gear to rotate. The second bevel gear meshes and rotates with multiple first bevel gears, driving the pivot shaft to rotate to drive the blade to swing. As a result, the blade is removed from the perpendicular state between the thickness direction and the axial direction of the driving rod, and the blade is in an inclined state. At this time, the geothermal tail water flowing into the filter bag from the water inlet pipe will impact the blade, causing the blade to drive the rotating disk to rotate. When the rotating disk rotates, it will drive the rotating shaft to rotate. The rotating shaft is spline-connected to the spline sleeve, and can drive the spline sleeve to rotate, causing the lower end of the filter bag to start curling around its axis and forming a mouth-like state, enabling the filter bag to exert a squeezing effect on the sludge inside it. The sludge is compressed and compacted, so that the sludge is compacted to a certain extent and will not be stirred up. During the curling and mouth-forming process of the filter bag, the mouth of the filter bag is tightened and forms a constricted shape. At this time, the elastic expansion sleeve will be in an elastically contracted state, enabling the mouth of the filter bag to be constricted. When the rotating shaft rotates, the volute spring will start accumulating elastic potential energy. When the flow rate of the geothermal tail water flowing into the filter bag decreases, the elastic potential energy accumulated by the volute spring is released, driving the rotating shaft to rotate in the reverse direction, causing the filter bag to change from the mouth-like state to the loose-mouth state.

[0031] Technical effects and advantages of the present invention:

[0032] By providing a rotating shaft, a spline sleeve, an elastic expansion sleeve and a rotating assembly, the rotating assembly drives the rotating shaft to rotate. When the rotating shaft rotates, it drives the spline sleeve to rotate. Since the spline sleeve is fixedly connected to the filter bag, it can drive the lower end of the filter bag to curl and form a mouth around the axis of the filter bag, enabling the filter bag to squeeze the sludge stored inside it and compact the sludge. At the same time, when the filter bag is tightened, it can wrap the sludge to a certain extent, making it difficult for the sludge to be stirred up by the water flow, thus reducing the phenomenon of the filter bag being blocked. In addition, the mouth-forming of the filter bag is a self-triggered action without manual intervention;

[0033] By setting an elastic expansion sleeve, when the filter bag is tightened at the mouth, in the state where the mouth of the bag shrinks, the elastic expansion sleeve shrinks elastically, so that the mouth of the filter bag can shrink smoothly, increasing the degree of tightening of the filter bag at the mouth.

[0034] By setting a floating plate, a connecting rod, a sliding sleeve, a driving column, a first bevel gear and a second bevel gear, when there is a lot of silt in the filter bag, affecting the permeability of the filter bag, since the flow rate of the water inlet pipe remains unchanged, the water output per unit time of the filter bag decreases, and then the geothermal tail water accumulates in the filter bag, and the liquid level rises. After the liquid level rises, it will generate buoyancy on the floating plate, causing the floating plate to drive the sliding sleeve to move upward, and then the ball on the driving column rolls in the spiral rolling groove of the sliding sleeve, so that the driving column rotates, and then the second bevel gear can be driven to rotate. When the second bevel gear rotates, it will engage with multiple first bevel gears, and then multiple pivot shafts can be driven to rotate, making the blades rotate synchronously. Thus, the thickness direction of the blades changes from being perpendicular to the axial direction of the driving rod in the initial state to not being perpendicular to the axial direction of the driving rod, and one side of the thickness direction tilts upward. In this way, the geothermal tail water will impact the blades and drive the rotating disk to rotate, so as to automatically perform the tightening action of the filter bag when the permeability of the filter bag decreases. Description of the Drawings

[0035] Figure 1 It is a schematic structural diagram of a geothermal tail water recharge device of the present invention;

[0036] Figure 2 is Figure 1 a partial structural cross-sectional view in;

[0037] Figure 3 is Figure 1 a schematic structural diagram in after omitting the recharge bin, the water outlet pipe, the water pump and the recharge pipe;

[0038] Figure 4 is Figure 3 an exploded view of the structure in;

[0039] Figure 5 is Figure 3 a schematic view of the structure in from the bottom view angle;

[0040] Figure 6 is Figure 5 an exploded view of the structure in;

[0041] Figure 7 It is a schematic structural diagram of the rotating disk, the rotating shaft and the floating plate assembled in the present invention;

[0042] Figure 8 is Figure 7 a front view of the structure in;

[0043] Figure 9 isFigure 7 Cross-sectional schematic diagram of a partial structure in

[0044] Figure 10 is Figure 9 Schematic diagram of the structure in from another angle;

[0045] Figure 11 is Figure 9 Schematic diagram of the structure in from the bottom view angle;

[0046] Figure 12 Schematic diagram of the assembled structure of the floating plate, sliding sleeve and driving column in the present invention;

[0047] Figure 13 is Figure 12 Cross-sectional schematic diagram of a partial structure in ;

[0048] Figure 14 is Figure 12 Exploded decomposition schematic diagram of the structure in .

[0049] The reference numerals in the drawings are: 1 - water inlet pipe, 2 - backfill bin, 3 - water outlet pipe, 4 - water pump, 5 - backfill pipe, 6 - support rod, 7 - elastic expansion sleeve, 8 - strip groove, 9 - filter bag, 10 - rotating shaft, 11 - fixing ring, 12 - mounting bracket, 13 - scroll spring, 14 - floating plate, 15 - rotating disk, 16 - blade, 17 - spline sleeve, 18 - kidney-shaped hole, 19 - pivot, 20 - installation space, 21 - sliding sleeve, 22 - driving column, 23 - first bevel gear, 24 - second bevel gear, 25 - driving rod, 26 - spiral rolling groove, 27 - ball, 28 - connecting rod. Detailed implementation manners

[0050] 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.

[0051] Such as Figures 1 - 14As shown in the figure, the present invention provides a geothermal tail water recharge device, which includes a recharge bin 2. The interior of the recharge bin 2 is hollow and it is vertically placed on the surface of the foundation. A water inlet pipe 1 is installed at the top of the recharge bin 2 and it is also provided with a water outlet pipe 3. A water pump 4 is installed on the water outlet pipe 3, and a recharge pipe 5 is installed at the water outlet of the water pump 4. One end of the water inlet pipe 1 extending into the recharge bin 2 is coaxially connected with an elastic expansion sleeve 7. The outer diameter of the elastic expansion sleeve 7 increases successively from top to bottom, and a plurality of strip-shaped grooves 8 in the form of notches are formed on the elastic expansion sleeve 7. By setting the strip-shaped grooves 8, when the elastic expansion sleeve 7 is subjected to an extrusion force along its radial inner side, the elastic expansion sleeve 7 can elastically contract, and after the extrusion force disappears, the elastic expansion sleeve 7 can automatically recover its deformation. A plurality of screws are horizontally threaded through the largest outer diameter end of the elastic expansion sleeve 7. A filter bag 9 is arranged in the recharge bin 2, and the bag mouth of the filter bag 9 is connected to the elastic expansion sleeve 7 by screws. A mounting frame 12 is fixedly welded in the recharge bin 2, and a plurality of support rods 6 are fixedly connected to the mounting frame 12. A fixing ring 11 is welded on the support rods 6, and the mounting frame 12 and the fixing ring 11 are in a coaxial state. A rotating shaft 10 is coaxially rotatably connected to the fixing ring 11 through a mounting bearing. A spline sleeve 17 is installed at the bottom of the filter bag 9, and the rotating shaft 10 coaxially slides into the spline sleeve 17 and is spline-connected to the spline sleeve 17. In this way, when the rotating shaft 10 rotates, it will synchronously drive the spline sleeve 17 to rotate. When the spline sleeve 17 rotates, a tightening force will be generated on the lower part of the filter bag 9, making the lower end of the filter bag 9 in a tightened and constricted shape. One end of the rotating shaft 10 extending into the filter bag 9 is coaxially connected with a rotating disk 15. The outer diameter of the rotating disk 15 increases successively from top to bottom. A plurality of pivot shafts 19 are rotatably connected along the axial direction of the conical edge of the rotating disk 15 in an array. The axial direction of the pivot shafts 19 is perpendicular to the conical edge of the rotating disk 15. One end of the pivot shaft 19 passing through the rotating disk 15 is fixedly connected with a blade 16. The lower surface of the blade 16 is in contact connection with the conical edge of the rotating disk 15. A first bevel gear 23 is fixedly sleeved on one end of the pivot shaft 19 passing into the rotating disk 15. An installation space 20 for installing a plurality of first bevel gears 23 is formed in the rotating disk 15. A driving rod 25 is coaxially rotatably connected in the rotating shaft 10. The upper end of the driving rod 25 penetrates into the installation space 20. A second bevel gear 24 is sleeved on the part of the upper end of the driving rod 25 penetrating into the installation space 20. The second bevel gear 24 meshes with a plurality of first bevel gears 23 together. In this embodiment, the number of blades 16 is 5, so the number of first bevel gears 23 is also 5. The second bevel gear 24 is located between the 5 first bevel gears 23 and meshes with the 5 first bevel gears 23 together. That is, when the second bevel gear 24 rotates, it will synchronously drive the 5 first bevel gears 23 to rotate synchronously in the same direction, and then can drive the pivot shafts 19 to rotate, so that the thickness direction of the blades 16 can be adjusted.

[0052] A floating plate 14 is slidably sleeved on a rotating shaft 10. The inside of the floating plate 14 can be made hollow. The floating plate 14 is horizontally fixedly connected with a connecting rod 28. The rotating shaft 10 is provided with a waist-shaped hole 18 for the connecting rod 28 to be inserted and capable of freely sliding up and down. The outer diameter of the floating plate 14 is smaller than the outer diameter of the rotating disc 15. In this way, when the geothermal tail water flows into the filter bag 9 from the water inlet pipe 1, it directly contacts the rotating disc 15 and does not contact the floating plate 14, avoiding the water flow from impacting the floating plate 14 downward. A sliding sleeve 21 is vertically welded at the middle position of the connecting rod 28. A sliding cavity for the sliding sleeve 21 to freely move is provided inside the rotating shaft 10. The lower end of the driving rod 25 is coaxially welded with a driving column 22. In addition, a reinforcing slider is fixedly connected to the driving rod 25. The reinforcing slider can freely slide up and down in the sliding cavity and forms a sliding fit with the sliding cavity. In this way, through the setting of the reinforcing slider, the rigidity of the driving rod 25 is increased. In addition, the rotational resistance of the driving column 22 is increased. At this time, the reinforcing slider can also be set to be key-connected with the inner wall of the sliding cavity to prevent the driving column 22 from rotating. In addition, a ball 27 is rotatably fitted at the lower end of the driving column 22. The sliding sleeve 21 is provided with a jack for the driving column 22 to telescopically insert. A spiral rolling groove 26 for the ball 27 to be engaged and capable of freely rotating is provided on the inner wall of the jack. When the ball 27 rolls in the spiral rolling groove 26, the rotation angle of the driving column 22 is less than 90 degrees;

[0053] In addition, a scroll spring 13 is installed in the fixing ring 11. Both ends of the scroll spring 13 are fixedly connected to the inner hole wall of the fixing ring 11 and the rotating shaft 10 respectively, so that the rotating shaft 10 has resistance during rotation, and after the elastic potential energy stored in the scroll spring 13 is released, it can drive the rotating shaft 10 to rotate.

[0054] The working principle of the present invention: The geothermal tail water is transported to the water inlet pipe 1 by an external delivery pump, and then flows into the filter bag 9 from the water inlet pipe 1. The geothermal tail water is filtered by the filter holes of the filter bag 9. In the initial state, there is less silt in the filter bag 9, so that the permeability of the filter bag 9 is not affected. At this time, the liquid level in the filter bag 9 is relatively low, and the floating plate 14 is not affected by buoyancy, so that the driving rod 25 is in a static state. And at this time, the thickness direction of the blade 16 is perpendicular to the axial direction of the driving rod 25, so that when the geothermal tail water flowing into the filter bag 9 from the water inlet pipe 1 impacts the blade 16, it will not cause the blade 16 to drive the rotating disc 15 to rotate. After the geothermal tail water is filtered by the filter bag 9, it will accumulate in the recharge bin 2. As the liquid level of the accumulated geothermal tail water rises, it will enter the water pump 4 from the water outlet pipe 3. The water pump 4 is started to transport the geothermal tail water in the water outlet pipe 3 to the recharge pipe 5, and then transported to the underground geothermal layer through the recharge pipe 5 to realize the recharge of the geothermal tail water;

[0055] As the geothermal tail water continuously enters the filter bag 9 for filtration, the sludge in the filter bag 9 will accumulate more and more, affecting the permeability of the filter bag 9. As a result, the water flow pressure inside and outside the filter bag 9 is inconsistent, causing the liquid level of the geothermal tail water in the filter bag 9 to gradually rise. As the liquid level rises, the liquid surface of the geothermal tail water in the filter bag 9 will approach the floating plate 14 until it lifts the floating plate 14. The floating plate 14 moves upward under the influence of buoyancy, causing the floating plate 14 to drive the connecting rod 28 and the sliding sleeve 21 to move upward. When the sliding sleeve 21 moves upward, the ball 27 will roll in the spiral rolling groove 26, causing the driving column 22 to rotate. Since the driving rod 25 is rotatably connected to the rotating shaft 10, the driving rod 25 rotates synchronously, causing the second bevel gear 24 to rotate. The second bevel gear 24 meshes and rotates with multiple first bevel gears 23, driving the pivot shaft 19 to rotate to drive the blade 16 to swing. As a result, the blade 16 is removed from the perpendicular state between the thickness direction and the axial direction of the driving rod 25, and the blade 16 is in an inclined state. At this time, the geothermal tail water flowing into the filter bag 9 from the water inlet pipe 1 will impact the blade 16, causing the blade 16 to drive the rotating disk 15 to rotate. When the rotating disk 15 rotates, it will drive the rotating shaft 10 to rotate. The rotating shaft 10 is spline-connected to the spline sleeve 17, which can drive the spline sleeve 17 to rotate, causing the lower end of the filter bag 9 to start curling around its axis and forming a mouth-like state, that is, the filter bag 9 will become tightened, enabling the filter bag 9 to exert a squeezing effect on the sludge inside it. The sludge is squeezed and compacted, and the sludge is compacted to a certain extent and will not be stirred up. During the curling and mouth-forming process of the filter bag 9, the mouth of the filter bag 9 is in a constricted state under the action of the tightening force. At this time, the elastic expansion sleeve 7 will be in an elastically contracted state, enabling the mouth of the filter bag 9 to be mouth-formed. When the rotating shaft 10 rotates, the volute spring 13 will start accumulating elastic potential energy. When the flow rate of the geothermal tail water flowing into the filter bag 9 decreases, the elastic potential energy accumulated by the volute spring 13 is released, driving the rotating shaft 10 to rotate in the reverse direction, causing the filter bag 9 to change from the mouth-like state to the loose-mouth state. The flow rate of the geothermal tail water in this embodiment is obtained by those skilled in the art through a limited number of experiments to ensure that when the water flow impacts the blade 16, it can drive the rotating disk 15 to rotate, causing the filter bag 9 to be tightened at the mouth and exert a wrapping, squeezing, and compacting effect on the sludge.

[0056] Finally, several points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or the internal communication of two components. It can be directly connected. "Up", "down", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the described object changes, the relative position relationship may change;

[0057] Secondly: In the accompanying drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference may be made to the general design. Without conflict, the same embodiment and different embodiments of the present invention may be combined with each other;

[0058] Finally: 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 principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A geothermal tail water recharge device, comprising a recharge bin with a hollow interior. A water inlet pipe is installed at the top of the recharge bin and it is also provided with a water outlet pipe. It is characterized in that, Further comprising: An elastic expansion sleeve coaxially connected to one end of the water inlet pipe extending into the recharge bin, the outer diameter of the elastic expansion sleeve increasing sequentially from top to bottom, and a plurality of strip-shaped grooves in the form of notches are formed on the elastic expansion sleeve; A filter bag with a mouth detachably connected to the largest outer diameter end of the elastic expansion sleeve; A mounting rack fixed in the recharge bin, and a fixing ring coaxially fixed to the mounting rack; A rotating shaft coaxially and rotatably connected to the fixing ring, a spline sleeve is installed at the bottom of the filter bag, and the rotating shaft coaxially slides into the spline sleeve and is spline-connected to the spline sleeve; A rotating assembly for driving the rotating shaft to rotate, the rotating assembly includes: A rotating disk coaxially connected to one end of the rotating shaft extending into the filter bag, the outer diameter of the rotating disk increasing sequentially from top to bottom; A plurality of blades rotatably connected to the rotating disk through mounting pivots; A driving unit for driving the pivot to rotate; The driving unit includes: A first bevel gear fixedly sleeved on one end of the pivot penetrating into the rotating disk, and a mounting space for installing a plurality of first bevel gears is formed in the rotating disk; A driving rod coaxially and rotatably connected inside the rotating shaft and having an upper end extending into the mounting space; A second bevel gear sleeved on the upper end of the driving rod, and the second bevel gear meshes with a plurality of first bevel gears together; A rotating mechanism for driving the driving rod to rotate; The rotating mechanism includes: A floating plate slidably sleeved on the rotating shaft, the floating plate is horizontally fixed with a connecting rod, and the rotating shaft is provided with a kidney-shaped hole for the connecting rod to be inserted and capable of freely sliding up and down, and the outer diameter of the floating plate is smaller than the outer diameter of the rotating disk; A sliding sleeve fixed to the connecting rod, and a sliding cavity for the sliding sleeve to freely move is formed inside the rotating shaft; A driving column coaxially connected to the lower end of the driving rod, a ball is rotatably embedded at the lower end of the driving column, and the sliding sleeve is provided with a jack for the driving column to telescopically insert, and a spiral rolling groove for the ball to engage and freely rotate is formed on the inner wall of the jack.

2. The geothermal tail water recharge device according to claim 1, characterized in that A water pump is installed on the water outlet pipe, and a recharge pipe is installed at the water outlet of the water pump.

3. The geothermal tail water recharge device according to claim 2, characterized in that, A volute spring is installed inside the fixing ring, and both ends of the volute spring are fixedly connected to the inner hole wall of the fixing ring and the rotating shaft respectively.

4. The geothermal tail water recharge device according to claim 3, characterized in that, The plurality of blades are arranged in an axial array along the rotating disk.

5. The recharge method of a geothermal tail water recharge device according to claim 4, characterized in that, Including: The geothermal tail water is transported to the water inlet pipe by a delivery pump, then flows into the filter bag from the water inlet pipe, and the geothermal tail water is filtered by the filter holes of the filter bag. In the initial state, there is less silt in the filter bag, so that the permeability of the filter bag is not affected. At this time, the liquid level in the filter bag is relatively low, and the floating plate is not affected by buoyancy, so that the driving rod is in a static state. And at this time, the thickness direction of the blade is perpendicular to the axial direction of the driving rod, so that when the geothermal tail water flowing into the filter bag from the water inlet pipe impacts the blade, it will not cause the blade to drive the rotating disk to rotate. After the geothermal tail water is filtered by the filter bag, it will accumulate in the recharge bin. As the accumulated geothermal tail water level rises, it will enter the water pump from the water outlet pipe, start the water pump, transport the geothermal tail water in the water outlet pipe to the recharge pipe, and then transport it to the underground geothermal layer through the recharge pipe to realize the recharge of the geothermal tail water; As the geothermal tail water continuously enters the filter bag for filtration, the sludge in the filter bag will accumulate more and more, affecting the permeability of the filter bag. As a result, the water flow pressure inside and outside the filter bag becomes inconsistent, causing the liquid level of the geothermal tail water in the filter bag to gradually rise. As the liquid level rises, the liquid surface of the geothermal tail water in the filter bag will approach the floating plate until the floating plate is lifted. Affected by the buoyancy, the floating plate moves upward, driving the connecting rod and the sliding sleeve to move upward. When the sliding sleeve moves upward, the ball will roll in the spiral rolling groove, causing the driving column to rotate. Since the driving rod is rotatably connected to the rotating shaft, the driving rod rotates synchronously, causing the second bevel gear to rotate. The second bevel gear meshes and rotates with multiple first bevel gears, driving the pivot shaft to rotate to drive the blade to swing. As a result, the blade is removed from the perpendicular state between the thickness direction and the axial direction of the driving rod, and the blade is in an inclined state. At this time, the geothermal tail water flowing into the filter bag from the water inlet pipe will impact the blade, causing the blade to drive the rotating disk to rotate. When the rotating disk rotates, it will drive the rotating shaft to rotate. The rotating shaft is spline-connected to the spline sleeve, enabling the spline sleeve to be driven to rotate, causing the lower end of the filter bag to start curling around its axis and forming a drawstring state. As a result, the filter bag can exert a squeezing effect on the sludge inside it. The sludge is compacted under the extrusion, preventing it from being stirred up. During the curling and drawstring process of the filter bag, the mouth of the filter bag is tightened under the action of the tightening force and forms a constricted opening. At this time, the elastic expansion sleeve will be in an elastically contracted state, enabling the mouth of the filter bag to be drawn in. When the rotating shaft rotates, the volute spring will start accumulating elastic potential energy. When the flow rate of the geothermal tail water flowing into the filter bag decreases, the elastic potential energy accumulated by the volute spring is released, driving the rotating shaft to rotate in the reverse direction, causing the filter bag to change from the drawstring state to the loose opening state.

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