Geothermal water recharge device

Abstract

The invention relates to the technical field of underground water recharge devices, and provides a geothermal water recharge device which comprises a base, and the top of the base is provided with a backflow well and a water storage tank; a drainage pipe and a communicating pipe are installed on the left side of the outer surface of the water storage tank, the bottom end of the communicating pipe extends into the backflow well, a communicating cylinder and a water inlet pipe are slidably installed on the top of the water storage tank, and a piston is arranged at the bottom of the interior of the water storage tank in a sealed and sleeved mode. The device is redesigned, and the siphon principle is utilized to realize recharging of geothermal wastewater, so that the energy consumption of the device during operation is greatly reduced, and the reliability of the device is remarkably improved; the height of the piston is automatically adjusted through the pressure difference between the compression elastic force, from the first spring, borne by the piston and the changing water pressure (water volume) of geothermal waste water located above the piston, and therefore energy consumption of the device during operation is greatly reduced.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of groundwater recharge devices, and in particular, to a geothermal water recharge device. Background Art

[0002] Geothermal heating requires extracting hot water from underground as a heat source and pumping it into the heating pipes in the building. After passing through the indoor heating devices such as radiators, heating is achieved. The water after heating is geothermal wastewater, which needs to be specially stored and centrally treated. At this time, a geothermal water reinjection device is needed to collect and store the geothermal wastewater. In the prior art, such as the document with patent number CN202420932307.4, a geothermal water reinjection device adopts the siphon principle to recover the geothermal wastewater to the return well by the liquid level difference. However, due to the need to use Hydraulic rods are used to lift the height of the water tank to ensure that the liquid level inside it is higher than the liquid level in the return well. In order to save energy consumption caused by starting the water pump, hydraulic rods are used instead. This energy-saving alternative is relatively backward. First of all, the hydraulic rods also need to be driven electrically, which also consumes electricity, and the water tank needs to be moved upward, which takes up a lot of space. In addition, an air pump is required to form negative pressure. The complexity of these combinations is no less than that of using a high-pressure water pump alone, and the energy saving is not obvious enough. Therefore, there is an urgent need for a simple, efficient and reliable geothermal water reinjection device. Summary of the Invention

[0003] To overcome the above-mentioned defects, the embodiments of the present disclosure provide a geothermal water reinjection device, which solves the technical problems of high energy consumption and low reliability in geothermal wastewater recovery in the prior art.

[0004] The present invention discloses a geothermal water reinjection device, comprising: A base, a reflux well and a water storage tank are respectively installed on the top of the base; A drainage pipe and a connecting pipe are installed on the left side of the outer surface of the water storage tank, and the bottom end of the connecting pipe extends into the interior of the reflux well. A connecting cylinder and a water inlet pipe are slidably installed on the top of the water storage tank. A bottom sealing sleeve inside the water storage tank is provided with a piston, and a support seat is installed on the top of the piston. The internal movably sleeve of the support seat is connected to the return pipe, and a rubber pad is glued to the left side of the return pipe. Two groups of connecting frames are fixedly installed on the bottom of the piston, and two groups of guide rods are hinged at the bottom of the inner wall of the water storage tank. A pulley is movably installed on the top of the guide rod, and the pulley is slidably installed on the inner wall of the connecting frame. A spring is elastically connected between the piston and the inner wall of the water storage tank, and a plurality of limit blocks higher than the top of the reflux well are fixedly installed in the middle of the inner wall of the water storage tank.

[0005] Preferably, a group of bellows are fixedly connected between the water storage tank and the inner wall of the connecting cylinder, and a buoyancy ring located above the bellows is fixedly installed on the inner wall of the connecting cylinder. The top of the buoyancy ring is arranged at an angle, and the outer side of the top of the buoyancy ring is higher than the inner side.

[0006] Preferably, the drain pipe is fixedly installed on the upper middle part of the left side of the outer surface of the water tank, and three groups of permanent magnets are fixedly installed inside the upper middle part of the left side of the outer surface of the water tank. The left end of the return water pipe is provided with three groups of placement grooves, and iron blocks are fixedly installed inside the placement grooves. The size and distribution of the three groups of iron blocks are the same as those of the permanent magnets. The outer surface of the return water pipe is movably connected with a spring 2 located on the left side of the support seat, and the two ends of the spring 2 are elastically connected to the return water pipe and the support seat respectively.

[0007] Preferably, the two groups of guide rods are symmetrically distributed front to back, and the top ends of the guide rods slide horizontally along the inner wall of the connecting frame.

[0008] Preferably, both ends of the connection frame are fixedly connected to limit bars, and the limit bars are used to limit the pulley from rolling toward the two ends of the connection frame.

[0009] Preferably, a second sealing ring is fixedly sleeved on the outer surface of the piston, and the second sealing ring is squeezed between the piston and the inner wall of the water tank. A first sealing ring is glued to the outer edge of the top of the piston, and the first sealing ring fits tightly against the inner wall of the water tank.

[0010] Preferably, the inner cavity of the water storage tank is filled with geothermal wastewater located above the piston, and the liquid level of the geothermal wastewater is always higher than the top of the return well.

[0011] Preferably, the axial cross-section of the water return pipe is in an "L" shape, and a gap is left between the bottom end of the water return pipe and the top of the piston.

[0012] Preferably, a solenoid valve is fixedly installed on the outer surface of the drain pipe, and the connecting pipe is in an "L" shape and is fixedly connected to the left end of the drain pipe.

[0013] Preferably, multiple groups of guide columns are slidably installed on the top of the outer surface of the water storage tank, the top of the guide column is fixedly connected to the connecting tube, a pillar is fixedly installed on the right side of the top of the base, and the pillar is fixedly installed on the bottom of the water storage tank. A balancing hole is opened on the outer surface of the water storage tank.

[0014] The beneficial effects of the embodiments of the present disclosure are: This device has been redesigned to utilize the siphon principle to achieve the reinjection of geothermal wastewater, which greatly reduces the energy consumption of the device during operation and significantly improves the reliability of the device.

[0015] 1. First, this device directly uses pillars to elevate the water storage tank. A piston sealed against the inner wall of the water storage tank flexibly supports the geothermal wastewater entering the water storage tank. The piston can move up and down. This design allows the upward movement of the piston and raises the liquid level of the geothermal wastewater in the water storage tank, even if there is only a small amount of geothermal wastewater in the water storage tank, thereby maintaining the necessary conditions for siphon drainage (the liquid level on the active drainage side is higher than the liquid level on the passive water collection side). The piston is elastically supported by a pair of springs. When the geothermal wastewater in the water storage tank increases, spring one is compressed and moves downward, expanding the volume of the water storage tank. When the geothermal wastewater in the water storage tank decreases, the water pressure on spring one decreases, and it automatically pushes the piston upward to ensure that the geothermal wastewater level in the water storage tank is always above the top of the return well. This design automatically adjusts the height of the piston by utilizing the pressure difference between the compressive elastic force exerted on the piston by spring one and the changing water pressure (water volume) of the geothermal wastewater above the piston, thereby significantly reducing the energy consumption of the device during operation.

[0016] 2. Then, the device installs a set of support seats on the top of the piston, and installs a set of return pipes movably inside the support seats. When the geothermal wastewater inside the water storage tank decreases, the downward pressure on the piston decreases. Under the push of spring 1, the support seat and the return pipe are gradually driven to move upward until the piston moves upward to the position abutting against the limit block and is limited and no longer moves upward. At this time, the left end opening of the return pipe just coincides with the drain pipe. At this time, the permanent magnet and the iron block also just coincide. The magnetic attraction of the permanent magnet on the iron block is used to drive the return pipe and the rubber pad to the left to apply pressure to the inner wall of the water storage tank, compressing spring 2 to make the rubber pad seal between the return pipe and the drain pipe. In this way, the geothermal wastewater located below the drain pipe can also form a sealed pipe with the return pipe, drain pipe and connecting pipe through the return pipe, thereby realizing the siphon drainage function and significantly enhancing the reliability of the device.

[0017] 3. Finally, two sets of guide rods are cross-symmetrically distributed and arranged in a scissor-like pattern. This design aims to provide a synchronous guiding function for the up and down movement of the piston. Since the piston sealing sleeve is arranged on the inner wall of the water storage tank, when the piston moves up and down under the combined force of spring 1 and the geothermal wastewater pressure in the water storage tank cavity, it will drive the connecting frame to move up and down. Since the bottom end of the guide rod is hinged to the bottom of the inner wall of the water storage tank, at this time, the top end of the guide rod drives the pulley to slide horizontally along the inner wall of the connecting frame for adaptation, and the two sets of guide rods provide a guiding function for the piston, making the up and down movement of the piston more stable. At the same time, the rotating and retracting structure of the guide rod also greatly saves space in the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly describes the drawings required for use in describing the embodiments of the present disclosure. Obviously, the drawings described below are merely some exemplary embodiments of the present disclosure. Those skilled in the art can, without inventive effort, derive other drawings based on the content of the exemplary embodiments of the present disclosure and these drawings.

[0019] Figure 1 Schematic diagram of the separation of the limit block, piston, sealing ring 1, sealing ring 2, connecting frame, guide rod, spring 1, support seat, return pipe, iron block, rubber pad, spring 2, limit block, pulley and permanent magnet of the present invention; Figure 2 This is a schematic diagram of the front appearance of the overall structure of the present invention; Figure 3 It is a front perspective schematic diagram of the overall structure of the present invention; Figure 4 It is a front cutaway schematic diagram of the water storage tank of the present invention; Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at A in the middle; Figure 6 For the present invention Figure 4 A magnified schematic diagram of the structure at B in the middle; Figure 7 For the present invention Figure 4 A magnified schematic diagram of the structure at C in the middle; Figure 8 It is a side cutaway schematic diagram of the water storage tank of the present invention; Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at D in the middle; Figure 10 This is a schematic diagram of the separation of the water storage tank, balancing hole, bellows, guide column, connecting tube and water inlet pipe of the present invention; Figure 11 This is a schematic diagram of the separation of the connecting frame, guide rod, limit block and pulley of the present invention.

[0020] Among them: 1. Base; 2. Pillar; 3. Water storage tank; 4. Balance hole; 5. Bellows; 6. Guide column; 7. Connecting tube; 8. Water inlet pipe; 9. Return well; 10. Drain pipe; 11. Solenoid valve; 12. Connecting pipe; 13. Limit block; 14. Piston; 15. Sealing ring 1; 16. Sealing ring 2; 17. Connecting frame; 18. Guide rod; 19. Spring 1; 20. Support seat; 21. Return pipe; 22. Iron block; 23. Rubber pad; 24. Spring 2; 25. Buoyancy ring; 26. Limit strip; 27. Pulley; 28. Placement slot; 29. ​​Permanent magnet. DETAILED DESCRIPTION

[0021] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than to limit the present disclosure.

[0022] To simplify the drawings, only the parts relevant to the disclosure are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0023] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0024] In the present disclosure, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present disclosure.

[0026] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] like Figures 1 to 11 As shown, it shows a geothermal water reinjection device disclosed in the present invention, comprising: The base 1 has a reflux well 9 and a water storage tank 3 mounted on the top of the base 1; A drain pipe 10 and a connecting pipe 12 are installed on the left side of the outer surface of the water storage tank 3. The bottom end of the connecting pipe 12 is extended into the interior of the return well 9. A connecting cylinder 7 and a water inlet pipe 8 are slidably installed on the top of the water storage tank 3. A piston 14 is provided on the bottom sealing sleeve inside the water storage tank 3. A support seat 20 is installed on the top of the piston 14. A return pipe 21 is movably sleeved inside the support seat 20. A rubber pad 23 is glued to the left side of the return pipe 21. Two groups of connecting frames 17 are fixedly installed on the bottom of the piston 14. Two groups of guide rods 18 are hinged at the bottom of the inner wall of the water storage tank 3. A pulley 27 is movably installed on the top of the guide rod 18. The pulley 27 is slidably installed on the inner wall of the connecting frame 17. A spring 19 is elastically connected between the piston 14 and the inner wall of the water storage tank 3. A plurality of limit blocks 13 higher than the top of the return well 9 are fixedly installed in the middle of the inner wall of the water storage tank 3; This device has been redesigned to utilize the siphon principle to achieve the reinjection of geothermal wastewater, which greatly reduces the energy consumption of the device during operation and significantly improves the reliability of the device.

[0028] This device directly uses the support 2 to raise the water storage tank 3, and uses the piston 14 provided on the inner wall of the water storage tank 3 to flexibly support the geothermal wastewater entering the water storage tank 3. The piston 14 can move up and down. This design makes it possible to move the piston 14 upward and raise the liquid level of the geothermal wastewater in the inner cavity of the water storage tank 3, even if there is little geothermal wastewater in the inner cavity of the water storage tank 3, to maintain the necessary conditions for siphon drainage (the liquid level on the active drainage side is higher than the liquid level on the passive water receiving side). The piston 14 is elastically supported by a spring 19. When it is in the storage When the amount of geothermal wastewater in the inner cavity of the water tank 3 increases, the spring 19 is compressed and moves downward to expand the volume of the water tank 3. When the amount of geothermal wastewater decreases, the water pressure on the spring 19 decreases and automatically pushes the piston 14 upward to ensure that the geothermal wastewater level in the inner cavity of the water tank 3 is always higher than the top of the return well 9. This design uses the pressure difference between the compression force of the spring 19 on the piston 14 and the changing water pressure (water volume) of the geothermal wastewater above the piston 14 to automatically adjust the height of the piston 14, thereby greatly reducing the energy consumption of the device during operation.

[0029] In this embodiment, a group of bellows 5 is fixedly connected between the water storage tank 3 and the inner wall of the connecting tube 7. A buoyancy ring 25 is fixedly installed on the inner wall of the connecting tube 7 and is located above the bellows 5. The top of the buoyancy ring 25 is arranged at an angle, and the outer side of the top of the buoyancy ring 25 is higher than the inner side. The bellows 5 is used to seal the connection between the water storage tank 3 and the connecting tube 7. When the liquid level of the geothermal wastewater in the water storage tank 3 is higher than the top of the water storage tank 3, the wastewater flows upward over the top of the bellows 5 and generates buoyancy on the buoyancy ring 25. The top inclined design of the buoyancy ring 25 can prevent the wastewater from remaining on its top, pushing the connecting tube 7 upward, thereby increasing the volume of the geothermal wastewater when the water storage tank 3 and the connecting tube 7 are combined.

[0030] In this embodiment, the drain pipe 10 is fixedly mounted on the upper middle portion of the left side of the outer surface of the water storage tank 3. Three groups of permanent magnets 29 are fixedly mounted inside the upper middle portion of the left side of the outer surface of the water storage tank 3. Three groups of placement grooves 28 are opened at the left end of the return pipe 21. Iron blocks 22 are fixedly mounted inside the placement grooves 28. The size and distribution of the three groups of iron blocks 22 are the same as those of the permanent magnets 29. The outer surface of the return pipe 21 is movably sleeved with a second spring 24 located on the left side of the support base 20. The two ends of the second spring 24 are elastically connected to the return pipe 21 and the support base 20, respectively. The device is provided with a set of support seats 20 on the top of the piston 14, and a set of return pipes 21 are movably installed inside the support seats 20. When the geothermal wastewater inside the water storage tank 3 is reduced, the downward pressure on the piston 14 is reduced. Under the push of the spring 19, the support seat 20 and the return pipe 21 are gradually driven to move upward until the piston 14 moves upward to the position where it abuts against the limit block 13 and is limited and no longer moves upward. At this time, the left end opening of the return pipe 21 is just in contact with the drain pipe 10. The permanent magnet 29 and the iron block 22 coincide with each other. The magnetic attraction of the permanent magnet 29 to the iron block 22 drives the return pipe 21 and the rubber pad 23 to the left to apply pressure to the inner wall of the water storage tank 3, compressing the spring 24 so that the rubber pad 23 seals the return pipe 21 and the drain pipe 10. In this way, the geothermal waste water below the drain pipe 10 can also form a sealed pipeline with the drain pipe 10 and the connecting pipe 12 through the return pipe 21, thereby realizing the siphon drainage function and significantly enhancing the reliability of the device.

[0031] In this embodiment, the two sets of guide rods 18 are symmetrically distributed front to back, and the top ends of the guide rods 18 slide horizontally along the inner wall of the connecting frame 17; The two sets of guide rods 18 are symmetrically distributed in a cross-like manner and in a scissor-like distribution. This design is intended to provide a synchronous guiding function for the up and down movement of the piston 14. Since the piston 14 sealing sleeve is arranged on the inner wall of the water storage tank 3, when the piston 14 moves up and down under the combined force of the spring 19 and the geothermal wastewater pressure in the inner cavity of the water storage tank 3, it will drive the connecting frame 17 to move up and down. Since the bottom end of the guide rod 18 is hinged to the bottom of the inner wall of the water storage tank 3, at this time, the top end of the guide rod 18 is adapted by driving the pulley 27 to slide horizontally along the inner wall of the connecting frame 17, and the two sets of guide rods 18 provide a guiding function for the piston 14, making the up and down movement of the piston 14 more stable. At the same time, the rotating and retracting structure of the guide rod 18 also greatly saves space for the device.

[0032] In this embodiment, both ends of the connection frame 17 are fixedly connected to the limit bars 26, and the limit bars 26 are used to limit the pulley 27 from rolling toward the two ends of the connection frame 17; like Figure 9 and Figure 11 As shown, the guide rod 18 drives the pulley 27 to rotate and slide on the inner wall of the connecting frame 17 . In order to prevent the pulley 27 from sliding out of the inner wall of the connecting frame 17 , the pulley 27 is limited by the limiting strip 26 .

[0033] In this embodiment, a second sealing ring 16 is fixedly sleeved on the outer surface of the piston 14. The second sealing ring 16 is squeezed between the piston 14 and the inner wall of the water storage tank 3. The outer edge of the top of the piston 14 is glued with a first sealing ring 15. The first sealing ring 15 is tightly fitted with the inner wall of the water storage tank 3. like Figure 7 As shown, the sealing ring 2 16 is responsible for the seal between the piston 14 and the inner wall of the water storage tank 3, while the sealing ring 15 is located at the outer edge of the top of the piston 14. When the level of the geothermal wastewater rises, the pressure on the sealing ring 15 will increase, making the sealing ring 15 fit more closely with the inner wall of the water storage tank 3, thereby enhancing the sealing effect of the piston 14.

[0034] In this embodiment, the inner cavity of the water storage tank 3 is filled with geothermal wastewater located above the piston 14, and the liquid level of the geothermal wastewater is always higher than the top of the return well 9; like Figure 4 As shown, the basic conditions for siphon drainage can only be met if the liquid level in the inner cavity of the water storage tank 3 is higher than the reflux well 9.

[0035] In this embodiment, the axial cross-section of the return pipe 21 is in an "L" shape, and a gap is left between the bottom end of the return pipe 21 and the top of the piston 14; like Figure 5 As shown, the return pipe 21 distributed in an "L" shape is connected to the geothermal wastewater in the inner cavity of the water storage tank 3 located at the top of the piston 14, and is responsible for discharging the geothermal wastewater whose liquid level is below the drain pipe 10 through the drain pipe 10 and the connecting pipe 12 to the return well 9.

[0036] In this embodiment, a solenoid valve 11 is fixedly mounted on the outer surface of the drain pipe 10, and the connecting pipe 12 is in an "L" shape and is fixedly connected to the left end of the drain pipe 10; The connecting pipe 12 is responsible for connecting with the left end of the drainage pipe 10 and draining the geothermal wastewater downward into the return well 9 after the solenoid valve 11 is opened.

[0037] In this embodiment, a plurality of guide posts 6 are slidably mounted on the top of the outer surface of the water storage tank 3. The top of the guide posts 6 is fixedly connected to the connecting tube 7. A support 2 is fixedly mounted on the right side of the top of the base 1. The support 2 is fixedly mounted on the bottom of the water storage tank 3. A balancing hole 4 is opened on the outer surface of the water storage tank 3. The guide column 6 is responsible for providing sliding support for the connecting tube 7 so as to improve the stability of the connecting tube 7 when it moves upward or downward.

[0038] Working principle: When the device is working, the water inlet pipe 8 and the water pump are connected through an external hose. The geothermal wastewater enters the inner cavity of the water storage tank 3 along the water inlet pipe 8 and falls on the piston 14. The sealing ring 15 and the sealing ring 2 16 provide sealing. The liquid level rises rapidly on the inner wall of the water storage tank 3 to the top of the drain pipe 10. At this time, the liquid level of the geothermal wastewater in the inner cavity of the water storage tank 3 is higher than the return well 9. Figure 4 As shown, as the liquid level of the geothermal wastewater in the inner cavity of the water storage tank 3 gradually rises, the pressure on the piston 14 gradually increases, and compresses the spring 19 downward. In the figure, the piston 14 is at the lowest position; Then, the solenoid valve 11 is opened, and the return well 9 and the inner cavity of the water storage tank 3 are connected through the drain pipe 10 and the connecting pipe 12. At this time, the geothermal wastewater continues to flow into the inner cavity of the return well 9 along the drain pipe 10 and the connecting pipe 12. If the speed at which the geothermal wastewater in the inner cavity of the water storage tank 3 is discharged along the drain pipe 10 is equal to the speed at which the geothermal wastewater is introduced into the inner cavity of the water storage tank 3 through the water inlet pipe 8, the total amount of geothermal wastewater in the inner cavity of the water storage tank 3 remains unchanged. If the speed at which the geothermal wastewater in the inner cavity of the water storage tank 3 is discharged along the drain pipe 10 is less than the speed at which the geothermal wastewater is introduced into the inner cavity of the water storage tank 3 through the water inlet pipe 8, the total amount of geothermal wastewater in the inner cavity of the water storage tank 3 gradually increases. At this time, the liquid level gradually overflows the bellows 5 and contacts the buoyancy ring 25. The buoyancy ring 25 is driven upward by the buoyancy generated by the geothermal wastewater to drive the connecting tube 7 to move, thereby increasing the volume of the inner cavity of the water storage tank 3 for placing geothermal wastewater. The discharge speed of the drain pipe 10 is greater than the speed at which the geothermal wastewater enters the inner cavity of the water storage tank 3 through the water inlet pipe 8, so the total amount of geothermal wastewater in the inner cavity of the water storage tank 3 gradually decreases, and the liquid level of the geothermal wastewater in the inner cavity of the water storage tank 3 gradually drops. As the geothermal wastewater on the top of the piston 14 decreases, the pressure on it decreases, and it moves upward under the elastic support of the spring 19, keeping the liquid level of the geothermal wastewater in the inner cavity of the water storage tank 3 always higher than the return well 9. When the piston 14 abuts against the limit block 13, it is limited and no longer moves upward, but at this time, the left end opening of the return pipe 21 coincides with the drain pipe 10, the permanent magnet 29 coincides with the iron block 22 and is magnetically attracted to each other, pressing the rubber pad 23, so that a seal is formed between the rubber pad 23 and the inner wall of the water storage tank 3, and then, the remaining geothermal wastewater in the inner cavity of the water storage tank 3 is automatically discharged into the return well 9 along the return pipe 21, the drain pipe 10 and the connecting pipe 12 through the siphon effect.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not limiting. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and all of these should be included in the scope of the claims of the present disclosure.

Claims

1. A geothermal water recharge device, characterized in that: include: A base (1), wherein a reflux well (9) and a water storage tank (3) are respectively installed on the top of the base (1); A drainage pipe (10) and a connecting pipe (12) are installed on the left side of the outer surface of the water storage tank (3), and the bottom end of the connecting pipe (12) is inserted into the interior of the return well (9). A connecting cylinder (7) and a water inlet pipe (8) are slidably installed on the top of the water storage tank (3). A piston (14) is provided on the bottom sealing sleeve inside the water storage tank (3), and a support seat (20) is installed on the top of the piston (14). The inner sleeve of the support seat (20) is movably connected to a return pipe (21), and a rubber pad is glued to the left side of the return pipe (21). (23), two groups of connecting frames (17) are fixedly installed at the bottom of the piston (14), two groups of guide rods (18) are hinged at the bottom of the inner wall of the water storage tank (3), pulleys (27) are movably installed at the top of the guide rods (18), and the pulleys (27) are slidably installed on the inner wall of the connecting frame (17), a spring (19) is elastically connected between the piston (14) and the inner wall of the water storage tank (3), and a plurality of groups of limit blocks (13) higher than the top of the reflux well (9) are fixedly installed in the middle of the inner wall of the water storage tank (3).

2. A geothermal water recharge device according to claim 1, characterized in that: A group of bellows (5) is fixedly connected between the water storage tank (3) and the inner wall of the connecting cylinder (7), and a buoyancy ring (25) located above the bellows (5) is fixedly installed on the inner wall of the connecting cylinder (7), wherein the top of the buoyancy ring (25) is arranged in an inclined manner, and the outer side of the top of the buoyancy ring (25) is higher than the inner side.

3. A geothermal water recharging device according to claim 2, characterized in that: The drainage pipe (10) is fixedly installed on the middle and upper part of the left side of the outer surface of the water storage tank (3), and three groups of permanent magnets (29) are fixedly installed inside the middle and upper part of the left side of the outer surface of the water storage tank (3). The left end of the return pipe (21) is provided with three groups of placement grooves (28), and the inside of the placement grooves (28) are fixedly installed with iron blocks (22). The size and distribution of the three groups of iron blocks (22) are the same as those of the permanent magnets (29). The outer surface of the return pipe (21) is movably connected to a spring 2 (24) located on the left side of the support seat (20), and the two ends of the spring 2 (24) are elastically connected to the return pipe (21) and the support seat (20) respectively.

4. A geothermal water recharging device according to claim 3, characterized in that: The two groups of guide rods (18) are symmetrically distributed front and back, and the top ends of the guide rods (18) slide horizontally along the inner wall of the connecting frame (17).

5. A geothermal water recharging device according to claim 4, characterized in that: Both ends of the connection frame (17) are fixedly connected to limit bars (26), and the limit bars (26) are used to limit the pulley (27) from rolling toward the two ends of the connection frame (17).

6. A geothermal water recharging device according to claim 5, characterized in that: The outer surface of the piston (14) is fixedly sleeved with a second sealing ring (16), and the second sealing ring (16) is squeezed between the piston (14) and the inner wall of the water storage tank (3). The outer edge of the top of the piston (14) is glued with a first sealing ring (15), and the first sealing ring (15) is tightly fitted with the inner wall of the water storage tank (3).

7. A geothermal water recharge device according to claim 6, characterized in that: The inner cavity of the water storage tank (3) is filled with geothermal wastewater located above the piston (14), and the liquid level of the geothermal wastewater is always higher than the top of the return well (9).

8. The geothermal water recharging device according to claim 7, characterized in that: The axial cross-section of the water return pipe (21) is L-shaped, and a gap is left between the bottom end of the water return pipe (21) and the top of the piston (14).

9. The geothermal water recharging device according to claim 8, characterized in that: A solenoid valve (11) is fixedly mounted on the outer surface of the drainage pipe (10), and the connecting pipe (12) is in an "L" shape and is fixedly connected to the left end of the drainage pipe (10).

10. The geothermal water recharging device according to claim 9, characterized in that: A plurality of guide columns (6) are slidably mounted on the top of the outer surface of the water storage tank (3), the top of each guide column (6) is fixedly connected to the connecting tube (7), a support column (2) is fixedly mounted on the right side of the top of the base (1), and the support column (2) is fixedly mounted on the bottom of the water storage tank (3), and a balancing hole (4) is provided on the outer surface of the water storage tank (3).

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