A device and method for closing down a mine geothermal water recharge depression storage

Abstract

The present application belongs to the technical field of fluid power generation system, and particularly relates to a closed mine geothermal water recharge potential energy storage device and method, wherein the closed mine geothermal water recharge potential energy storage device comprises a water turbine arranged in a vertical shaft and arranged in multiple along the height direction of the vertical shaft, used for converting the potential energy of the recharge water into electric energy; a buffer reversing device arranged directly below the liquid outlet end at the bottom of the vertical shaft and located in an air left lane, used for buffering and guiding the recharge water, and a use method of the closed mine geothermal water recharge potential energy storage device. The present application can absorb the potential energy of the recharge water to drive the water turbine to generate electricity, and the buffer reversing device can eliminate the downward impact force of the water flow and change the water flow into horizontal flow, so as to avoid the damage of the water impact to the rock stratum at the bottom of the air left lane and prevent the collapse of the bottom of the air left lane.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fluid power generation system, and particularly relates to a closed mine geothermal water recharge depression storage device and method. BACKGROUND

[0002] Closed / abandoned coal mines have rich water, heat and space resources, and can innovatively develop low-enthalpy geothermal resources and extend the economic life of the mine area, thereby reducing the negative impact on the environment and economy. During the process of geothermal water extraction, if the geothermal water is extracted for a long time without recharge, it may cause surface subsidence, so after the extracted geothermal water is used up, it needs to be recharged at a high proportion to ensure the stability of the underground water level and the geological safety.

[0003] During the process of geothermal water recharge, the water needs to be recharged to several hundred meters underground. During this process, due to the gravitational potential energy and the speed generated by the initial recharge flow, if direct recharge is performed, on the one hand, the potential energy is wasted, and on the other hand, the speed may cause damage to the surrounding rock, affecting the geological safety. Therefore, a closed mine geothermal water recharge depression storage device and method are urgently needed to solve the problem. SUMMARY

[0004] The purpose of the present application is to provide a closed mine geothermal water recharge depression storage device and method to solve the above problems.

[0005] To achieve the above purpose, the present application provides the following scheme:

[0006] A closed mine geothermal water recharge depression storage device, comprising:

[0007] A water turbine is arranged in a vertical shaft and is arranged in multiple along the height direction of the vertical shaft, and is used to convert the potential energy of the recharge water into electrical energy.

[0008] A buffer reversing device is arranged directly below the liquid outlet end of the bottom of the vertical shaft and is located in an empty roadway, and is used for buffering and guiding the flow of the recharge water.

[0009] Preferably, the buffer reversing device comprises a concrete base, the concrete base is fixed in the empty roadway, and the concrete base is located directly below the liquid outlet end of the bottom of the vertical shaft.

[0010] A buffer plate and a flow guide plate are slidably arranged on the concrete base.

[0011] The buffer plate and the flow guide plate are vertically arranged in space.

[0012] The buffer plate and the flow guide plate are hinged through a plurality of hinge parts.

[0013] The hinged part is hinged to the movable end of the elastic support part, and the fixed end of the elastic support part is embedded in the concrete base.

[0014] Preferably, the hinge portion includes a second connecting rod, one end of which is fixedly connected to the bottom of the buffer plate, the other end of which is hinged to one end of a hinge shaft, the other end of which is hinged to one end of a third connecting rod, and the other end of the third connecting rod is fixedly connected to one side of the guide plate.

[0015] The middle part of the hinge shaft is hinged to the movable end of the elastic support.

[0016] Preferably, the elastic support includes an elastic telescopic rod, the movable end of which is hinged to the middle of the hinge shaft, and the fixed end of which is embedded in the concrete base.

[0017] Preferably, one end of a first connecting rod is fixedly connected to the front and rear sides of the buffer plate, and the other end of the first connecting rod is rotatably connected to a first pulley. The first pulley is slidably mounted on a slide rail, and the slide rail is fixedly connected to the concrete base.

[0018] Preferably, one end of a fourth connecting rod is fixedly connected to the front and rear sides of the guide plate, and the other end of the fourth connecting rod is rotatably connected to a second pulley, which is slidably mounted on the slide rail.

[0019] Preferably, the top of the buffer plate is provided with an impact groove, the impact groove is arc-shaped, and the high end of the impact groove is located near the side of the concrete base.

[0020] A method for using a mine geothermal water reinjection and de-energizing energy storage device, based on the above-mentioned mine geothermal water reinjection and de-energizing energy storage device, includes the following steps:

[0021] S1. Water turbines are installed at intervals along the height direction of the vertical shaft inside the vertical shaft;

[0022] S2. The buffer reversing device is placed directly below the liquid outlet end of the vertical shaft, and the buffer reversing device is fixed to the empty roadway;

[0023] S3. The geothermal water that has recovered its heat energy is reinjected through the vertical shaft. When the geothermal water falls, its gravitational potential energy is converted into electrical energy by the water turbine and stored, and the falling potential energy of the geothermal water is consumed.

[0024] S4. After the geothermal water flows out from the bottom of the shaft, it impacts the buffer reversing device, which absorbs the remaining potential energy of the geothermal water and guides it into the empty tunnel.

[0025] Compared with the prior art, the present invention has the following advantages and technical effects:

[0026] In operation, water turbines are installed at intervals along the vertical direction of the shaft. The water turbines are distributed on both sides of the shaft. The turbines are driven by the reinjection water to generate electricity, while reducing the downward impact force of the water flow. In order to achieve sufficient hydraulic pressure to drive the water turbines, the hydroelectric power generation devices arranged at different depths are spaced 50m-100m apart. The buffer reversing device is located directly below the liquid outlet end of the shaft. After the geothermal water flows out from the bottom of the shaft, it impacts the buffer reversing device. The buffer reversing device absorbs the remaining potential energy of the reinjection water and guides the reinjection water into the empty tunnel, dissipating the downward impact force of the water flow and changing the hydraulic flow to a horizontal direction. This avoids damage to the rock strata at the bottom of the empty tunnel by hydraulic impact and prevents the bottom of the empty tunnel from collapsing. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the buffer reversing device of the present invention;

[0030] Figure 3 This is a front view of the buffer reversing device of the present invention;

[0031] Figure 4 This is a top view of the buffer reversing device of the present invention;

[0032] Figure 5 For the present invention Figure 4 Enlarged view of a portion of point A in the middle;

[0033] Among them, 1. Vertical shaft; 2. Empty roadway; 3. Water turbine; 4. Buffer reversing device; 401. Concrete base; 402. Buffer plate; 403. Slide rail; 404. First pulley; 405. First connecting rod; 406. Impact groove; 407. Second connecting rod; 408. Guide plate; 409. Third connecting rod; 410. Elastic telescopic rod; 411. Fourth connecting rod; 412. Second pulley; 413. Hinge shaft. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figures 1 to 5 This invention discloses a mine geothermal water reinjection and energy storage device, comprising:

[0037] Water turbine 3 is installed inside vertical shaft 1, and multiple turbines are installed along the height of vertical shaft 1 to convert the potential energy of reinjected water into electrical energy.

[0038] The buffer reversing device 4 is located directly below the liquid outlet at the bottom of the vertical shaft 1, inside the empty tunnel 2, and is used for buffering and guiding the reinjection water.

[0039] In use, water turbines 3 are installed at intervals along the height of shaft 1 inside shaft 1. The water turbines 3 are distributed on both sides of shaft 1. The water turbines 3 are driven by the reinjection water to generate electricity, while reducing the downward impact force of the water flow. In order to achieve sufficient hydraulic pressure to drive the water turbines 3, the hydroelectric power generation devices arranged at different intervals are spaced 50m-100m apart. The buffer reversing device 4 is set directly below the liquid outlet end of shaft 1. After the geothermal water flows out from the bottom of shaft 1, it impacts the buffer reversing device 4. The buffer reversing device 4 absorbs the remaining potential energy of the reinjection water and guides the reinjection water into the empty tunnel 2, dissipating the downward impact force of the water flow and changing the hydraulic flow to a horizontal direction, avoiding damage to the bottom rock layer of the empty tunnel 2 by hydraulic impact and preventing the bottom of the empty tunnel 2 from collapsing.

[0040] Further optimization of the scheme: the buffer reversing device 4 includes a concrete base 401, which is fixed in the empty runway 2 and is located directly below the liquid outlet end at the bottom of the vertical shaft 1.

[0041] A buffer plate 402 and a guide plate 408 are slidably installed on the concrete base 401;

[0042] The buffer plate 402 and the guide plate 408 are arranged vertically in space;

[0043] The buffer plate 402 and the guide plate 408 are hinged together by several hinge parts;

[0044] The hinged part is hinged to the movable end of the elastic support part, and the fixed end of the elastic support part is embedded in the concrete base 401.

[0045] The scheme is further optimized. The hinge part includes a second connecting rod 407. One end of the second connecting rod 407 is fixedly connected to the bottom of the buffer plate 402. The other end of the second connecting rod 407 is hinged to one end of the hinge shaft 413. The other end of the hinge shaft 413 is hinged to one end of the third connecting rod 409. The other end of the third connecting rod 409 is fixedly connected to one side of the guide plate 408.

[0046] The middle part of the hinge shaft 413 is hinged to the movable end of the elastic support.

[0047] In a further optimized design, the elastic support includes an elastic telescopic rod 410, the movable end of which is hinged to the middle of the hinge shaft 413, and the fixed end of which is embedded in the concrete base 401.

[0048] In a further optimized design, one end of a first connecting rod 405 is fixedly connected to the front and rear sides of the buffer plate 402, and the other end of the first connecting rod 405 is rotatably connected to a first pulley 404. The first pulley 404 is slidably mounted on a slide rail 403, and the slide rail 403 is fixedly connected to the concrete base 401.

[0049] In a further optimized design, one end of a fourth connecting rod 411 is fixedly connected to the front and rear sides of the guide plate 408, and the other end of the fourth connecting rod 411 is rotatably connected to a second pulley 412, which is slidably mounted on the slide rail 403.

[0050] During use, the reinjected water impacts the buffer plate 402. The impact force of the water flow causes the end of the buffer plate 402 away from the concrete base 401 to move downward. At this time, the elastic telescopic rod 410 retracts under the action of the second connecting rod 407. Simultaneously, the top of the guide plate 408 is pulled by the third connecting rod 409. At this time, the end of the buffer plate 402 near the concrete base 401 will tilt upward. It moves on the corresponding slide rail 403 through the first connecting rod 405 and the first pulley 404. At the same time, the bottom end of the guide plate 408 will also move away from the concrete base 401, making the buffer plate 402 tilted and the guide plate 408 closer to the horizontal state. As the impact force of the water flow changes, the elastic telescopic rod 410 dissipates this part of the energy. The water with dissipated impact force is guided into the empty tunnel 2 through the guide plate 408.

[0051] The design is further optimized by providing an impact groove 406 on the top of the buffer plate 402. The impact groove 406 is curved, and the high end of the impact groove 406 is located near the side of the concrete base 401.

[0052] Impact groove 406 is formed on buffer plate 402. Impact groove 406 is arc-shaped. The high end of impact groove 406 is set near the concrete base 401, so that the impact force of water flow can act on the end of buffer plate 402 away from concrete base 401. At the same time, the second connecting rod 407 is set at an angle, with its bottom end close to concrete base 401, so that the force acting on buffer plate 402 can more easily compress elastic telescopic rod 410.

[0053] A method for using a mine geothermal water reinjection and de-energizing energy storage device, based on the above-mentioned mine geothermal water reinjection and de-energizing energy storage device, includes the following steps:

[0054] S1. Water turbines 3 are installed at intervals along the height direction of vertical shaft 1 inside vertical shaft 1;

[0055] S2. Set the buffer reversing device 4 directly below the liquid outlet end of the vertical shaft 1, and fix the buffer reversing device 4 to the empty roadway 2;

[0056] S3. The geothermal water that has recovered its heat energy is reinjected through the vertical shaft 1. When the geothermal water falls, its gravitational potential energy is converted into electrical energy by the water turbine 3 and stored, and the falling potential energy of the geothermal water is consumed.

[0057] S4. After the geothermal water flows out from the bottom of the shaft 1, it impacts the buffer reversing device 4, which absorbs the remaining geothermal water potential energy and guides the geothermal water into the empty tunnel 2.

[0058] The working process of this invention is as follows:

[0059] As the reinjected water descends along the vertical shaft 1, its potential energy increases continuously. This energy is then used to generate electricity by impacting the water turbine 3, which in turn consumes the potential energy during the descent. When the reinjected water comes into contact with the buffer plate 402, the water flow presses down on the end of the buffer plate 402 away from the concrete base 401. Through the cooperation of the second connecting rod 407, the third connecting rod 409, and the hinge shaft 413, the elastic telescopic rod 410 is compressed, while the guide plate 408 is pulled to change its angle in the horizontal direction. At this time, the first connecting rod 405, the first pulley 404, the fourth connecting rod 411, and the second pulley 412 all slide within their corresponding slide rails 403. Due to the change in the impact force of the reinjected water flow, the elastic telescopic rod 410 is compressed to absorb the impact force of the water flow. When the reinjection stops, the elastic telescopic rod 410 is compressed to return to its initial length, allowing the buffer plate 402 and the guide plate 408 to return to their initial state.

[0060] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0061] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A mine geothermal water reinjection and energy storage device for reducing potential, characterized in that, include: Water turbines (3) are installed inside the vertical shaft (1), and multiple turbines are installed along the height direction of the vertical shaft (1) to convert the potential energy of the reinjected water into electrical energy. The buffer reversing device (4) is located directly below the liquid outlet end at the bottom of the vertical shaft (1) and inside the empty storage tunnel (2) for buffering and guiding the reinjection water; The buffer reversing device (4) includes a concrete base (401), which is fixed in the empty roadway (2) and is located directly below the liquid outlet end at the bottom of the vertical shaft (1). A buffer plate (402) and a guide plate (408) are slidably disposed on the concrete base (401). The buffer plate (402) and the guide plate (408) are arranged vertically in space; The buffer plate (402) and the guide plate (408) are hinged together by a number of hinges; The hinged part is hinged to the movable end of the elastic support part, and the fixed end of the elastic support part is embedded in the concrete base (401). The hinged part includes a second connecting rod (407), one end of which is fixedly connected to the bottom of the buffer plate (402), and the other end of the second connecting rod (407) is hinged to one end of a hinge shaft (413). The other end of the hinge shaft (413) is hinged to one end of a third connecting rod (409), and the other end of the third connecting rod (409) is fixedly connected to one side of the guide plate (408). The middle part of the hinge shaft (413) is hinged to the movable end of the elastic support part; The top of the buffer plate (402) is provided with an impact groove (406), the impact groove (406) is arc-shaped, and the high end of the impact groove (406) is located near the concrete base (401). The second connecting rod (407) is inclined, with its bottom end close to the concrete base (401).

2. The mine geothermal water reinjection and energy storage device according to claim 1, characterized in that: The elastic support includes an elastic telescopic rod (410), the movable end of which is hinged to the middle of the hinge shaft (413), and the fixed end of which is embedded in the concrete base (401).

3. The mine geothermal water reinjection and energy storage device according to claim 1, characterized in that: The buffer plate (402) has one end of a first connecting rod (405) fixedly connected to the front and rear sides respectively. The other end of the first connecting rod (405) is rotatably connected to a first pulley (404). The first pulley (404) is slidably mounted on a slide rail (403). The slide rail (403) is fixedly connected to the concrete base (401).

4. The mine geothermal water reinjection and energy storage device according to claim 3, characterized in that: The front and rear sides of the guide plate (408) are respectively fixed with one end of the fourth connecting rod (411), and the other end of the fourth connecting rod (411) is rotatably connected to the second pulley (412), which is slidably disposed on the slide rail (403).

5. A method for using a mine geothermal water reinjection and energy storage device for reducing potential, based on the mine geothermal water reinjection and energy storage device for reducing potential as described in any one of claims 1-4, characterized in that... Includes the following steps: S1. Water turbines (3) are installed at intervals along the height direction of the vertical shaft (1) inside the vertical shaft (1); S2. The buffer reversing device (4) is set directly below the liquid outlet end of the vertical shaft (1), and the buffer reversing device (4) is fixed to the empty passage (2); S3. The geothermal water that has recovered its heat energy is reinjected into the vertical shaft (1). When the geothermal water falls, its gravitational potential energy is converted into electrical energy by the water turbine (3) and stored, and the falling potential energy of the geothermal water is consumed. S4. After the geothermal water flows out from the bottom of the vertical shaft (1), it impacts the buffer reversing device (4), absorbs the remaining geothermal water potential energy through the buffer reversing device (4), and guides the geothermal water into the empty tunnel (2).

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