Potential reduction and energy storage device and method for closing mine geothermal water recharge

Abstract

The invention belongs to the technical field of fluid power generation systems, and particularly relates to a potential-reducing energy storage device and method for closing mine geothermal water recharge, and the potential-reducing energy storage device for closing mine geothermal water recharge comprises a plurality of water turbines which are arranged in a vertical shaft in the height direction of the vertical shaft and used for converting the potential energy of recharge water into electric energy; and the buffering and reversing device is arranged under the liquid outlet end of the bottom of the vertical shaft, located in the gob-side entry and used for buffering and guiding flow of recharge water, and the using method for closing the mine geothermal water recharge potential reduction energy storage device is provided. Potential energy of recharge water can be absorbed to drive the water turbine to generate power, downward impact force of water flow can be eliminated by the buffer reversing device, hydraulic power is changed into horizontal flow, damage of water impact to a rock stratum at the bottom of the gob-retaining entry is avoided, and collapse of the bottom of the gob-retaining entry is prevented.

Description

Technical Field

[0001] The present invention belongs to the technical field of fluid power generation systems, and in particular relates to a device and method for closing a mine geothermal water for reinjection and reducing potential for energy storage. Background Art

[0002] Closed / abandoned coal mines, due to their rich water, heat and space resources, can innovatively develop low-enthalpy geothermal resources and extend the economic life of the mining area, reducing the negative impact on the environment and economy. In the process of geothermal water extraction, if long-term extraction without recharge may cause surface subsidence, so it is necessary to recharge a higher proportion of the extracted geothermal water after it is used up to ensure the stability of the groundwater level and geological safety.

[0003] In the process of geothermal water recharging, water often needs to be recharged to hundreds of meters underground. In this process, due to the gravitational potential energy and the initial recharged water flow velocity, if it is recharged directly, on the one hand, it will cause a waste of these potential energies, and on the other hand, this speed may cause damage to the underground surrounding rock and affect geological safety. Therefore, a device and method for reducing the potential of geothermal water recharge in mines is urgently needed to solve the problem. Summary of the invention

[0004] The object of the present invention is to provide a device and method for closing the potential reduction energy storage of geothermal water recharge in a mine to solve the above-mentioned problem.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A device for reducing the potential of geothermal water recharge in a closed mine, comprising:

[0007] A water turbine is arranged in the shaft, and a plurality of water turbines are arranged along the height direction of the shaft, and is used to convert the potential energy of the reinjected water into electrical energy;

[0008] The buffer reversing device is arranged just below the liquid outlet at the bottom of the shaft and is located in the empty lane for buffering and diverting the reinjection water.

[0009] Preferably, the buffer reversing device comprises a concrete base, the concrete base is fixed in the empty lane, and the concrete base is located directly below the liquid outlet at the bottom of the shaft;

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

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

[0012] The buffer plate and the guide plate are hingedly connected via a plurality of hinged parts;

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

[0014] Preferably, the hinged portion comprises a second connecting rod, one end of the second connecting rod is fixedly connected to the bottom of the buffer plate, the other end of the second connecting rod is hinged to one end of a hinge shaft, the other end of the hinge shaft 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 portion of the hinge shaft is hinged to the movable end of the elastic support portion.

[0016] Preferably, the elastic support portion comprises an elastic telescopic rod, a movable end of the elastic telescopic rod is hinged to the middle portion of the hinge shaft, and a fixed end of the elastic telescopic rod 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 respectively, the other end of the first connecting rod is rotatably connected to a first pulley, the first pulley is slidably arranged 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 respectively, the other end of the fourth connecting rod is rotatably connected to a second pulley, and the second pulley is slidably arranged on the slide rail.

[0019] Preferably, an impact groove is provided on the top of the buffer plate, the impact groove is an arc surface, and the high end of the impact groove is arranged close to one side of the concrete base.

[0020] A method for using a device for closing a mine geothermal water recharge and reducing potential energy storage is provided, based on the above-mentioned device for closing a mine geothermal water recharge and reducing potential energy storage, comprising the following steps:

[0021] S1, arranging turbines in the shaft at intervals along the height direction of the shaft;

[0022] S2, setting the buffer reversing device just below the liquid outlet end of the shaft, and fixing the buffer reversing device to the empty lane;

[0023] S3, the geothermal water whose heat energy has been recovered is recharged through the vertical shaft, and the gravitational potential energy of the geothermal water is converted into electrical energy and stored through the turbine when the geothermal water falls, 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, absorbs the remaining geothermal water potential energy through the buffer reversing device, and guides the geothermal water into the empty lane.

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

[0026] When in use, turbines are arranged at intervals in the shaft along the height direction of the shaft; the turbines are distributed on both sides of the shaft, and the turbines are driven to rotate 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 turbines, the hydroelectric generating devices arranged at different intervals are 50m-100m apart, and the buffer reversing device is arranged directly below the liquid outlet of the shaft. After the geothermal water flows out from the bottom of the shaft, it impacts the buffer reversing device, absorbs the remaining reinjection water potential energy through the buffer reversing device, and diverts the reinjection water into the empty tunnel, dissipates the downward impact force of the water flow, and changes the hydraulic force to flow in the horizontal direction, thereby avoiding damage to the rock formation at the bottom of the empty tunnel by hydraulic impact and preventing the bottom of the empty tunnel from collapsing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

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

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

[0032] Figure 5 For the present invention Figure 4 A partial enlarged view of the middle part;

[0033] Among them, 1. vertical shaft; 2. empty lane; 3. 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. articulated shaft. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figures 1 to 5 The present invention discloses a closed mine geothermal water recharging de-potential energy storage device, comprising:

[0037] The turbine 3 is arranged in the shaft 1, and a plurality of turbines are arranged along the height direction of the shaft 1, and is used to convert the potential energy of the reinjected water into electrical energy;

[0038] The buffering reversing device 4 is arranged just below the liquid outlet at the bottom of the shaft 1 and is located in the empty lane 2 for buffering and diverting the reinjection water.

[0039] When in use, turbines 3 are arranged at intervals in the shaft 1 along the height direction of the shaft 1; the turbines 3 are distributed on both sides of the shaft 1, and the turbines 3 are driven to rotate by the reinjected water to generate electricity, while reducing the downward impact force of the water flow. In order to achieve sufficient hydraulic pressure to drive the turbine 3, the hydroelectric generating devices arranged at different intervals are spaced 50m-100m apart, and the buffer reversing device 4 is arranged directly below the liquid outlet end of the shaft 1. After the geothermal water flows out from the bottom end of the shaft 1, it impacts the buffer reversing device 4, and the remaining reinjected water potential energy is absorbed by the buffer reversing device 4, and the reinjected water is diverted into the empty tunnel 2, the downward impact force of the water flow is eliminated, and the hydraulic force is changed to flow in the horizontal direction, so as to avoid damage to the rock formation at the bottom of the empty tunnel 2 by hydraulic impact, and prevent the bottom of the empty tunnel 2 from collapsing.

[0040] According to a further optimization scheme, the buffer reversing device 4 includes a concrete base 401, which is fixed in the empty lane 2, and the concrete base 401 is located directly below the liquid outlet at the bottom of the shaft 1;

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

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

[0043] The buffer plate 402 and the guide plate 408 are hingedly connected through a plurality of hinge parts;

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

[0045] In a further optimized solution, the hinged portion 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 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;

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

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

[0048] According to a further optimization scheme, one end of a first connecting rod 405 is fixedly connected to the front and rear sides of the buffer plate 402 respectively, and the other end of the first connecting rod 405 is rotatably connected to a first pulley 404, and the first pulley 404 is slidably set on a slide rail 403, and the slide rail 403 is fixedly connected to the concrete base 401.

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

[0050] When in use, the reinjected water impacts the buffer plate 402, and the impact force of the water flow causes the buffer plate 402 to move downward away from one end of the concrete base 401. At this time, the elastic telescopic rod 410 is contracted under the action of the second connecting rod 407, and 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 close to the concrete base 401 will be tilted upward, and move 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, so that the buffer plate 402 is in an inclined state, and the guide plate 408 changes to a horizontal state. As the impact force of the water flow changes, this part of the energy is dissipated through the elastic expansion and contraction of the elastic telescopic rod 410, and the water with the dissipated impact force is guided to the empty lane 2 through the guide plate 408.

[0051] According to a further optimization scheme, an impact groove 406 is provided on the top of the buffer plate 402 . The impact groove 406 is an arc surface, and a high end of the impact groove 406 is arranged close to one side of the concrete base 401 .

[0052] The impact groove 406 is opened on the buffer plate 402. The impact groove 406 is an arc surface. The high end of the impact groove 406 is arranged close to one side of the concrete base 401, so that the impact force of the water flow acts on the end of the buffer plate 402 away from the concrete base 401. At the same time, the second connecting rod 407 is inclined, and its bottom end is close to the concrete base 401, so that the force acting on the buffer plate 402 can more easily compress the elastic telescopic rod 410.

[0053] A method for using a device for closing a mine geothermal water recharge and reducing potential energy storage is provided, based on the above-mentioned device for closing a mine geothermal water recharge and reducing potential energy storage, comprising the following steps:

[0054] S1, arranging turbines 3 in the shaft 1 at intervals along the height direction of the shaft 1;

[0055] S2, set the buffer reversing device 4 just below the liquid outlet end of the shaft 1, and fix the buffer reversing device 4 to the empty lane 2;

[0056] S3, the geothermal water whose heat energy has been recovered is recharged from the vertical shaft 1. When the geothermal water falls, its gravitational potential energy is converted into electrical energy and stored through the turbine 3, 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, absorbs the remaining geothermal water potential energy through the buffer reversing device 4, and guides the geothermal water into the empty tunnel 2.

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

[0059] As the reinjected water descends along the shaft 1, as the potential energy continues to increase, the potential energy in the falling process is consumed by impacting the turbine 3 to rotate it and generate electrical energy. When the reinjected water contacts the buffer plate 402, the water flow presses the buffer plate 402 away from one end of 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 and the guide plate 408 is pulled to change its angle in the horizontal direction. At this time, the first connecting rod 405 and the first pulley 404, the fourth connecting rod 411 and the second pulley 412 all slide in the corresponding slide rail 403. Due to the change in the impact force of the reinjected water flow, the impact force of the water flow is consumed by the elastic expansion and contraction of the compressed elastic telescopic rod 410. When the reinjection stops, the compressed elastic telescopic rod 410 restores its initial length, so that the buffer plate 402 and the guide plate 408 return to their initial states.

[0060] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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, and therefore should not be understood as a limitation on the present invention.

[0061] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A device for closing the potential reduction of geothermal water recharge in a mine, characterized in that: include: A water turbine (3) is arranged in the vertical shaft (1), and a plurality of water turbines are arranged along the height direction of the vertical shaft (1), and is used to convert the potential energy of the reinjected water into electrical energy; The buffering reversing device (4) is arranged just below the liquid outlet at the bottom of the vertical shaft (1) and is located in the empty lane (2) for buffering and diverting the reinjection water.

2. The device for reducing the potential of geothermal water in closed mines according to claim 1 is characterized in that: The buffer reversing device (4) comprises a concrete base (401), the concrete base (401) is fixed in the empty tunnel (2), and the concrete base (401) is located directly below the liquid outlet at the bottom of the shaft (1); A buffer plate (402) and a guide plate (408) are slidably arranged on the concrete base (401); The buffer plate (402) and the guide plate (408) are vertically arranged in space; The buffer plate (402) and the guide plate (408) are hingedly connected via a plurality of hinged parts; The hinged portion is hingedly connected to the movable end of the elastic support portion, and the fixed end of the elastic support portion is embedded in the concrete base (401).

3. The device for reducing the potential of geothermal water in closed mines according to claim 2, characterized in that: The hinged portion comprises 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 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 portion of the hinge shaft (413) is hinged to the movable end of the elastic support portion.

4. The device for reducing the potential of geothermal water when closing a mine according to claim 3 is characterized in that: The elastic support portion comprises an elastic telescopic rod (410), the movable end of the elastic telescopic rod (410) is hinged to the middle of the hinge shaft (413), and the fixed end of the elastic telescopic rod (410) is embedded in the concrete base (401).

5. The device for reducing the potential of geothermal water when closing a mine according to claim 2 is characterized in that: One end of a first connecting rod (405) is fixedly connected to the front and rear sides of the buffer plate (402), respectively. The other end of the first connecting rod (405) is rotatably connected to a first pulley (404). The first pulley (404) is slidably arranged on a slide rail (403), and the slide rail (403) is fixedly connected to the concrete base (401).

6. The device for reducing the potential of geothermal water when closing a mine according to claim 5 is characterized in that: One end of a fourth connecting rod (411) is fixedly connected to the front and rear sides of the guide plate (408), respectively. The other end of the fourth connecting rod (411) is rotatably connected to a second pulley (412), and the second pulley (412) is slidably arranged on the slide rail (403).

7. The device for reducing the potential of geothermal water when closing a mine according to claim 2 is characterized in that: The top of the buffer plate (402) is provided with an impact groove (406), the impact groove (406) is a curved surface, and the high end of the impact groove (406) is arranged close to one side of the concrete base (401).

8. A method for using a device for reducing the potential of a geothermal water recharge in a mine, based on the device for reducing the potential of a geothermal water recharge in a mine as claimed in any one of claims 1 to 7, characterized in that: The steps include: S1, arranging water turbines (3) in the vertical shaft (1) at intervals along the height direction of the vertical shaft (1); S2, arranging the buffer reversing device (4) just below the liquid outlet end of the shaft (1), and fixing the buffer reversing device (4) and the empty lane (2); S3, the geothermal water whose heat energy has been recovered is recharged through the vertical shaft (1), and the gravitational potential energy of the geothermal water is converted into electrical energy and stored through the turbine (3) when the geothermal water falls, and the falling potential energy of the geothermal water is consumed; S4, after the geothermal water flows out from the bottom end 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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