High-efficiency extraction equipment for deep geothermal exploitation based on coal mine geothermal

Abstract

The application discloses a kind of high-efficiency extraction equipment based on coal mine geothermal deep geothermal exploitation, it is related to deep geothermal exploitation technical field.The application includes: the initial filter cartridge that is movably arranged at the bottom end of underground water pipe and expands outward to alleviate the clogging condition;The motion assembly that is movably arranged in the first chamber and is driven by water pressure to adaptively expand and shrink the initial filter cartridge;The scraping assembly that is movably arranged outside the initial filter cartridge and moves downward under the influence of the initial filter cartridge expansion.The column gap in the initial filter cartridge becomes larger when the initial filter cartridge expands, and some small particle impurities enter the underground water pipe, thereby alleviating the clogging condition of the initial filter cartridge, and the application can better adapt to deep well environment.The clogging condition of the initial filter cartridge is fed back to itself and passively expands and shrinks, which is less unstable and less lagging than electrical signal transmission, and can more timely and effectively handle the clogging problem, which helps efficient operation of deep geothermal extraction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deep geothermal exploitation, in particular to a high-efficiency extraction equipment for deep geothermal exploitation based on coal mine geothermal. BACKGROUND

[0002] Coal mine geothermal is the heat energy existing in the stratum of the coal mine area. In coal mining, with the increase of the mining depth of the mine, the ground temperature will gradually rise, and the underground rock stratum and underground water contain a large amount of heat energy. At present, the demand for heat energy is increasing in many aspects such as building heating and production process heating, and deep geothermal, as a clean, stable and renewable energy source, can provide a new way for energy supply.

[0003] The depth of deep geothermal varies due to the differences in geological conditions and geothermal characteristics of different regions. Generally, the depth of deep geothermal is within 1,000 to 3,000 meters. Due to such depth, the difficulty of deep geothermal exploitation is greater. The existing deep geothermal extraction equipment mainly consists of a wellhead device, an underground heat exchange pipe, an underground water extraction pipe, an underground primary filter device, a circulating pump, a ground fine filter system, and a ground heat exchange system. The underground primary filter device is mainly used to intercept large impurities in the underground hot water outside the underground water extraction pipe, thereby reducing the risk of blockage and wear of the underground water extraction pipe caused by the large impurities, which can effectively reduce the frequency of cleaning or even replacing the inner wall of the underground water extraction pipe.

[0004] During the extraction of deep geothermal, the stroke is very long, so a very large suction force is required, which causes the large impurities in the underground to be tightly adsorbed on the surface of the filter screen of the primary filter device under the influence of the large suction force. After a period of use, the large impurities will accumulate to a certain extent and seriously block the filter holes, thereby further reducing the efficiency of geothermal extraction. The existing primary filter device usually uses a flow detector to detect the flow of the ground water outlet to determine whether the filter holes are blocked. If the water flow is significantly reduced, the backwashing equipment in the primary filter device is started to use ultra-high water pressure to wash away the large impurities on the surface of the filter screen in the opposite direction, thereby alleviating the filter hole blockage and improving the efficiency of geothermal extraction.

[0005] Due to the poor underground environment, the flow detector is generally installed on the ground, and the electric signal transmission effect between the ground flow detector and the underground backwashing equipment will also be greatly affected by the poor underground environment, so that the signal transmission is unstable, the backwashing equipment is not normally started and stopped, and the geothermal extraction effect is not ideal. Secondly, although the reverse flushing method can alleviate the filter hole blockage, due to the very large underground water pressure, the adsorption force of the large impurities is very large, similar to two strong magnetic magnets, which need to be separated in the opposite direction with a lot of force, so that the water pressure requirement of the backwashing equipment and the performance requirement of the equipment are very high, and the use cost is also increased.

[0006] In view of the above problems, it is urgent to make innovative design on the basis of the original high-efficiency extraction equipment for deep geothermal exploitation based on coal mine geothermal. SUMMARY

[0007] The technical scheme of the present application provides a solution significantly different from the prior art, and specifically aims to provide a high-efficiency extraction equipment for deep geothermal exploitation based on coal mine geothermal, to solve the problem that the electric signal transmission effect between the ground flow detector and the underground backwashing equipment will also be greatly affected by the poor underground environment.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a high-efficiency extraction equipment for deep geothermal exploitation based on coal mine geothermal, comprising an underground water pipe and a first chamber, a second chamber and a third chamber opened in the bottom end of the underground water pipe, further comprising:

[0009] The initial filter cartridge is movably arranged at the bottom end of the underground water pipe and expands to relieve the blockage condition;

[0010] The movement assembly is movably arranged in the first chamber and is driven by water pressure to adaptively expand and contract the initial filter cartridge;

[0011] The scraping assembly is movably arranged outside the initial filter cartridge and moves downward under the influence of the expansion of the initial filter cartridge;

[0012] The movement assembly comprises a piston plate movably arranged in the first chamber, a flap plate rotatably arranged in the third chamber, and a moving plate slidably inserted at one end of the flap plate;

[0013] The scraping assembly comprises a ring sleeve movably arranged outside the initial filter cartridge.

[0014] Preferably, the first chamber, the second chamber and the third chamber are opened in equal proportions.

[0015] One end of the top of the first chamber is communicated with the inside of the second chamber.

[0016]

[0016] The other end of the first chamber is communicated with the inside of the downhole water pipe;

[0017] The third chamber is located below the first chamber.

[0018] Preferably, the primary filter cartridge is composed of several groups of proportionally distributed columns, each group of the columns is located directly below each group of the third chambers;

[0019] The diameter of the columns decreases from top to bottom;

[0020] Each group of the columns is distributed in an inclined manner;

[0021] The top of each group of the columns is fixedly connected with the bottom of each group of the moving plates;

[0022] The bottom end of the primary filter cartridge is movably provided with a bottom disc;

[0023] The bottom of each group of the columns is fixedly provided with an inverted T-shaped sliding block, and the top surface of the bottom disc is proportionally provided with an inverted T-shaped sliding groove matched with the inverted T-shaped sliding block.

[0024] Preferably, the moving assembly further comprises a connecting rod movably penetrating the inner wall of the downhole water pipe;

[0025] The connecting rod is provided in an inverted U shape, and one end of the connecting rod extends into the inside of the first chamber and is fixedly connected with one side of the piston plate;

[0026] The other end of the connecting rod extends through the downhole water pipe and is slidably inserted into the inside of the third chamber at the other end of the flap plate;

[0027] The other side of the piston plate is fixedly provided with a first reset spring;

[0028] The other end of the first reset spring is fixedly connected with the inner wall of the first chamber.

[0029] Preferably, the bottom of each group of the third chambers is slidably inserted with a sealing sliding strip;

[0030] The length of the sealing sliding strip is greater than the length of the moving trajectory of the moving plate;

[0031] Both ends of the sealing sliding strip extend into and outside the downhole water pipe.

[0032] Preferably, the bottom of the downhole water pipe is fixedly provided with a limiting track directly below each group of the sealing sliding strips;

[0033] The moving plate is composed of a square plate and a cross-shaped sliding block fixedly connected with the bottom of the square plate;

[0034] The top of the limiting track is provided with a square groove consistent with the size of the square plate, and the square plate slides in the square groove.

[0035] The thickness of the groove is less than the thickness of the sealing slide bar;

[0036] The bottom of the limiting track is provided with a cross-shaped sliding groove matched with the cross-shaped sliding block, and the cross-shaped sliding block slides in the cross-shaped sliding groove.

[0037] Preferably, the scraping assembly further comprises a scraping blade fixed to the bottom of the ring sleeve;

[0038] The scraping blade is provided with a plurality of groups in equal proportion;

[0039] Each group of the scraping blade is located in the gap between every two groups of the cylinder in the primary filter cartridge.

[0040] Preferably, the inner side wall of the ring sleeve is fixed with a plurality of groups of elastic clamping sleeves in equal proportion;

[0041] Each group of the elastic clamping sleeve is clamped and wrapped outside each group of the cylinder in the primary filter cartridge;

[0042] The inner wall of the elastic clamping sleeve is provided with a plurality of groups of uniformly distributed rolling balls;

[0043] Preferably, the top surface of the bottom plate is fixed with a vertical rod in the center;

[0044] The height of the vertical rod is greater than the height of the primary filter cartridge;

[0045] The outer surface of the vertical rod is movably sleeved with a second reset spring at both ends;

[0046] One end of each of the two groups of the second reset spring is fixedly connected with the surface of the bottom plate and the top of the vertical rod, respectively.

[0047] Preferably, the outer surface of the vertical rod is movably sleeved with a traction member;

[0048] The traction member is composed of a sliding sleeve and a long rod fixed to the outer wall of the sliding sleeve and distributed in equal proportion;

[0049] The sliding sleeve is movably sleeved on the outer surface of the vertical rod;

[0050] One end of the long rod is fixedly connected with the scraping blade;

[0051] The other end of each of the two groups of the second reset spring is fixedly connected with both ends of the sliding sleeve.

[0052] Compared with the prior art, the present application has the following advantages:

[0053] 1. In the application, when the primary filter cartridge is blocked by impurities, the suction device at the wellhead is still in the suction state, so the air pressure in the downhole water pipe becomes smaller, the piston plate is forced to move to the middle of the downhole water pipe under the influence of strong suction force, the connecting rod is moved by the piston plate, and the deflection of the flap is caused, finally the primary filter cartridge is expanded, the application uses the principle that the air pressure in the downhole water pipe presents different sizes when the primary filter cartridge is blocked or unblocked, so that the primary filter cartridge can be self-adapted to expand and retract, when the primary filter cartridge expands, the gap between the columns in the primary filter cartridge becomes larger, some small impurities will enter the downhole water pipe, so as to alleviate the condition that the primary filter cartridge is seriously blocked (in actual use, due to the pressure influence of underground rock strata, water flow and other directions, underground impurities cannot be completely isolated outside in the primary filtration process, and part of small impurities will enter the downhole water pipe and be treated by the ground fine filtration system, so when the primary filter cartridge is seriously blocked, some small impurities can be released by slightly expanding into the downhole water pipe), which can effectively improve the efficiency of geothermal extraction, and compared with the electric signal transmission method used by the existing flow detector and backwashing equipment, the application can better adapt to the deep well environment, and the blocking condition of the primary filter cartridge does not need to consume too much manual labor to check, the blocking condition of the primary filter cartridge is "fed back" to itself and makes it passively expand and retract, compared with the instability and hysteresis of the electric signal transmission, the application can more timely and effectively handle the blocking problem, which is helpful for efficient operation of deep geothermal extraction.

[0054] 2. When the primary filter cartridge expands, the push ring is pushed, so that the ring is forced to move down, and the scraper can scrape away the large impurities adsorbed on the outer wall of the primary filter cartridge, compared with the hard reverse separation of large impurities and the primary filter cartridge, the force required to scrape the impurities along the surface of the primary filter cartridge is smaller (similar to two strong magnetic magnets attracted to each other, it is easier to separate by using the up-down friction separation method), so that the cleaning effect of the application is better than that of the existing backwashing equipment which has the problem of being difficult to flush away the large impurities adsorbed too tightly, and the structure of the application is simpler and the use cost is lower. BRIEF DESCRIPTION OF DRAWINGS

[0055] Figure 1 It is the first schematic diagram of the three-dimensional structure of the application.

[0056] Figure 2 It is the first schematic diagram of the cross-section structure of the application.

[0057] Figure 3 It is the schematic diagram of the working state structure of the application.

[0058] Figure 4 It is the schematic diagram of the cross-section structure of the working state of the application.

[0059] Figure 5 It is the schematic diagram of the local cross-section structure of the application.

[0060] Figure 6 Amplified perspective view of A in the present application Figure 5 Amplified perspective view of A in the present application

[0061] Figure 7 Amplified perspective view of A in the present application

[0062] Figure 8 Amplified perspective view of A in the present application

[0063] Figure 9 Amplified perspective view of A in the present application

[0064] Figure 10 Amplified perspective view of A in the present application

[0065] Figure 11 Amplified perspective view of A in the present application

[0066] In the figure: 1, downhole water pipe; 2, primary filter cylinder; 3, bottom plate; 4, traction piece; 5, sealing slide; 6, ring sleeve; 61, scraper; 62, elastic sleeve; 7, connecting rod; 8, No. 1 reset spring; 9, piston plate; 10, limit track; 11, warped plate; 12, moving plate; 13, vertical rod; 14, No. 2 reset spring; 15, No. 1 chamber; 16, No. 2 chamber; 17, No. 3 chamber. DETAILED DESCRIPTION

[0067] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0068] Please refer to Figures 1 to 11 The present application provides a technical solution: a high-efficiency extraction equipment for deep geothermal exploitation based on coal mine geothermal, which comprises a downhole water pipe 1 and a No. 1 chamber 15, a No. 2 chamber 16 and a No. 3 chamber 17 opened in the bottom end of the downhole water pipe 1, and further comprises:

[0069] The primary filter cylinder 2 is movably arranged at the bottom end of the downhole water pipe 1 to relieve the plugging condition by outward expansion;

[0070] In a specific implementation, although the suction force on each group of piston plates 9 can be uneven, the partial cylinder expansion in the initial filter cartridge 2 can also push the ring sleeve 6 downward, and it is not necessary for all the cylinders in the initial filter cartridge 2 to expand at the same rate. When the initial filter cartridge 2 is severely blocked and almost closed, the time difference for each group of cylinders to start expanding is very small and can be ignored. That is, the more severely the initial filter cartridge 2 is blocked, the faster the ring sleeve 6 starts to be pushed downward.

[0071] In addition, it should be noted that the downhole water pipe 1 is composed of an inner and outer pipe, and the inner and outer pipes are filled with thermal insulation materials, including but not limited to rock wool, polyurethane foam, etc. The specific filling of the corresponding thermal insulation materials is not described in detail here as prior art.

[0072] The movable assembly is movably arranged inside the first chamber 15 and is driven by water pressure to adapt to the expansion and contraction of the initial filter cartridge 2.

[0073] The scraping assembly is movably arranged outside the initial filter cartridge 2 and moves downward under the influence of the expansion of the initial filter cartridge 2.

[0074] The movable assembly includes piston plates 9 movably arranged inside the first chamber 15, a flap 11 rotatably arranged inside the third chamber 17, and a moving plate 12 slidably arranged at one end of the flap 11.

[0075] In a specific implementation, as shown in FIGS. 1 and 2, the piston plates 9 are arranged in the first chamber 15 in a staggered manner. Figure 5 As shown in FIGS. 1 and 2, the flap 11 is rotatably arranged in the third chamber 17. Figure 6 As shown in FIGS. 1 and 2, the moving plate 12 is slidably arranged at one end of the flap 11.

[0076] The scraping assembly includes a ring sleeve 6 movably arranged outside the initial filter cartridge 2.

[0077] In a specific implementation, the diameter of the ring sleeve 6 is consistent with the top diameter of the initial filter cartridge 2 in the initial state of non-expansion. Similar to the principle of a bracelet, when the fingers are not fully expanded at the beginning, the fingers tightly abut against the bracelet wall, so that the bracelet is fixed at a certain position by internal support. When the fingers expand, the bracelet is pushed downward. The present application uses this principle to forcibly push the ring sleeve 6 downward by the expansion of the initial filter cartridge 2, and uses the rolling balls in the elastic sleeve 62 to reduce the friction between the initial filter cartridge 2 and the elastic sleeve 62, so that the process of pushing the ring sleeve 6 downward is smoother.

[0078] The first chamber 15, the second chamber 16, and the third chamber 17 are proportionally provided with a plurality of groups.

[0079] One end of the top of the first chamber 15 is in communication with the inside of the second chamber 16.

[0080] In specific implementation, as shown in the appendix Figure 5 As shown, a channel groove is provided between the top of one end of the first chamber 15 and the second chamber 16. The channel groove is located away from the piston plate 9. The piston plate 9 does not contact the channel groove during its entire stroke, so that water can flow into the second chamber 16 along the channel groove. When the piston plate 9 returns to its original position, the second chamber 16 provides space for excess air, so as to prevent the air pressure in the first chamber 15 from affecting the movement of the piston plate 9.

[0081] The other end of chamber 15 is connected to the interior of the downhole water pipe 1;

[0082] In practice, the pressure inside the other end of the first chamber 15 will change at any time according to the pressure inside the downhole water pipe 1.

[0083] Chamber 3, 17, is located below Chamber 1, 15.

[0084] The primary filter cartridge 2 consists of several groups of columns distributed in equal proportions, with each group of columns located directly below each group of chamber 17.

[0085] In practice, the gaps between the columns provide a channel for water flow and the passage of some small particulate impurities.

[0086] The diameter of the column decreases from top to bottom;

[0087] In practice, the gaps between adjacent groups of columns are almost uniform from top to bottom, resulting in better filtration uniformity and smaller differences in the size of impurities that can pass through the gaps, which facilitates subsequent fine filtration.

[0088] Several groups of columns are distributed at an angle;

[0089] In practice, the primary filter cartridge 2 is shaped like an inverted frustum, so that the ring 6 can be squeezed and moved downward when the primary filter cartridge 2 expands.

[0090] The top of each set of columns is fixedly connected to the bottom of each set of movable plates 12;

[0091] In practice, when the movable plate 12 moves due to the rotation of the rocker plate 11, it can drive the primary filter cylinder 2 to move simultaneously.

[0092] A base plate 3 is movably installed at the bottom end of the primary filter cartridge 2;

[0093] Each set of columns has an inverted T-shaped slider fixed at the bottom, and the top surface of the chassis 3 is proportionally provided with an inverted T-shaped groove that matches the inverted T-shaped slider.

[0094] In specific implementation, when the primary filter cartridge 2 is expanded or contracted, the bottom thereof is more stable and will not easily deviate due to the limiting effect of the inverted T-shaped sliding groove and the inverted T-shaped sliding block, and the gap of each group of columns in the primary filter cartridge 2 always maintains a relatively consistent state from top to bottom.

[0095] The moving assembly further comprises a connecting rod 7 movably penetrating the inner wall of the downhole water pipe 1;

[0096] In specific implementation, the inner wall of the downhole water pipe 1 is provided with a circular hole at a position corresponding to the connecting rod 7, the diameter of the circular hole is consistent with the outer diameter of the connecting rod 7, the inner wall of the circular hole is provided with a rubber sealing ring, the sealing effect between the circular hole and the connecting rod 7 is good, water flow is not easy to flow into the third chamber 17 from the gap between the two, the third chamber 17 maintains a good sealing state, and water flow impurities are prevented from corroding the internal components of the third chamber 17.

[0097] The connecting rod 7 is provided in an inverted U shape, and one end of the connecting rod 7 extends to the inside of the first chamber 15 and is fixedly connected to one side of the piston plate 9;

[0098] The other end of the connecting rod 7 extends through the downhole water pipe 1 to the inside of the third chamber 17 and is slidably inserted at the other end of the hinged plate 11;

[0099] In specific implementation, a second sliding column is fixed at the middle of the other end of the connecting rod 7, and the second sliding column slides in the sliding groove at the other end of the hinged plate 11, and has the same principle as the moving plate 12. When the hinged plate 11 rotates, the connecting rod 7 moves horizontally, and the hinged plate 11 and the connecting rod 7 are not easy to jam.

[0100] The other side of the piston plate 9 is fixed with a first reset spring 8;

[0101] In specific implementation, the size of the piston plate 9 is adapted to the size of the first chamber 15, the piston plate 9 is composed of a hard plate inside and a rubber layer wrapped outside the hard plate, the rubber layer is interference filled in the inside of the first chamber 15, the sealing effect between the piston plate 9 and the first chamber 15 is good, the space where the first reset spring 8 is located is in a sealed state, that is, the water in the downhole water pipe 1 will not easily flow to the first reset spring 8, avoiding corrosion of the first reset spring 8 by water flow.

[0102] The other end of the first reset spring 8 is fixedly connected to the inner wall of the first chamber 15.

[0103] A sealing sliding strip 5 is slidably inserted at the bottom of each group of third chambers 17;

[0104] The length of the sealing sliding strip 5 is greater than the length of the moving track of the moving plate 12;

[0105] The two ends of the sealing sliding strip 5 respectively extend to the inside and outside of the downhole water pipe 1.

[0106] In the specific implementation, a rubber sealing ring is provided at the bottom of the third chamber 17. The sealing strip 5 always remains in close contact with the rubber sealing ring during the movement of the moving plate 12, ensuring that water will not easily flow into the interior of the third chamber 17 from the gap between the third chamber 17 and the moving plate 12 when the moving plate 12 is moving.

[0107] The bottom of the downhole water pipe 1 is fixed with a limit track 10 directly below each set of sealing slides 5;

[0108] The movable plate 12 consists of a square plate and a cross slider fixed to the bottom of the square plate;

[0109] The top of the limiting track 10 has a square groove with the same size as the square plate, and the square plate slides inside the square groove;

[0110] The thickness of the square groove is less than the thickness of the sealing strip 5;

[0111] In practice, the square groove provides space and limits the movement of the movable plate 12, ensuring the horizontality of the movement of the movable plate 12. Furthermore, the square groove is blocked by the sealing strip 5, making it difficult for water to flow into the third chamber 17 from the square groove.

[0112] The bottom of the limiting track 10 is provided with a cross groove that is adapted to the cross slider, and the cross slider slides inside the cross groove.

[0113] In practice, the horizontal and stable movement of the movable plate 12 is further ensured, and the movable plate 12 will not move up or down.

[0114] The scraping assembly also includes a scraper 61 fixed to the bottom of the ring 6;

[0115] The scraper blades 61 are set in several groups in equal proportions;

[0116] Each set of scraper blades 61 is located in the middle of the gap between every two sets of columns in the primary filter cartridge 2.

[0117] In specific implementation, the bottom surface of the scraper 61 is set to be inclined, as shown in the attached figure. Figure 9 and attached Figure 10 As shown, the bottom slope of the scraper 61 allows some impurities to be removed from below the scraper 61 along the slope trajectory, reducing the resistance of the ring 6 moving downward.

[0118] Several sets of elastic retaining sleeves 62 are fixed proportionally on the inner side wall of the ring sleeve 6;

[0119] Each set of elastic sleeves 62 snaps together and wraps around the outside of each set of columns in the primary filter cartridge 2;

[0120] In practice, each set of elastic sleeves 62 moves along the surface of each set of columns in the primary filter cartridge 2 without any rotational offset.

[0121] The inner wall of the elastic sleeve 62 is provided with several groups of uniformly distributed rolling balls.

[0122] In specific implementation, when the ring sleeve 6 is forced to be pushed down, the rolling balls can reduce the friction between the elastic sleeve 62 and the cylinder in the primary filter cartridge 2, so that the ring sleeve 6 moves more smoothly.

[0123] The top surface of the bottom disc 3 is fixed with a vertical rod 13;

[0124] The height of the vertical rod 13 is greater than the height of the primary filter cartridge 2;

[0125] The outer surface of the vertical rod 13 is movably sleeved with two groups of second reset springs 14 at both ends;

[0126] One end of the two groups of second reset springs 14 is fixedly connected with the surface of the bottom disc 3 and the top of the vertical rod 13, respectively.

[0127] In specific implementation, the extension directions of the two groups of second reset springs 14 are opposite, when the pulling member 4 moves down, one of the two groups of second reset springs 14 located below is compressed, and the other group of second reset springs 14 is stretched, when the pulling member 4 moves up, one of the two groups of second reset springs 14 rebounds and expands, and the other group of second reset springs 14 rebounds and compresses, and the rebounding force of the second reset springs 14 drives the ring sleeve 6 to move up and reset, so as to prepare for the next scraping work.

[0128] The outer surface of the vertical rod 13 is movably sleeved with a pulling member 4;

[0129] The pulling member 4 is composed of a sliding sleeve and long rods fixed on the outer wall of the sliding sleeve and distributed in equal proportions;

[0130] The sliding sleeve is movably sleeved on the outer surface of the vertical rod 13;

[0131] One end of the long rod is fixedly connected with the scraping blade 61;

[0132] The other end of the two groups of second reset springs 14 is fixedly connected with both ends of the sliding sleeve, respectively.

[0133] In specific implementation, when the ring sleeve 6 moves down, the pulling member 4 moves synchronously, and then the two groups of second reset springs 14 can be charged, when the second reset springs 14 rebound, the pulling member 4 drives the ring sleeve 6 to move up and reset.

[0134] Working principle: in the use of the coal mine geothermal based deep geothermal exploitation of high efficiency extraction equipment, first put the equipment into the well drilled in advance, according to the prior art on the whole extraction equipment installation and laying, this invention does not do much elaboration, the invention needs to be explained is that when the water pump absorbs underground hot water, water flow and impurities will pass through the initial filter cylinder 2, part of the large block impurities tightly adsorbed on the outside of the initial filter cylinder 2, part of the small particle impurities along with the water flow is sucked to the ground in the downhole water pipe 1, with the more and more impurities filtered outside, whether it is a large block impurities or small block impurities are accumulated outside the initial filter cylinder 2, causing the initial filter cylinder 2 to be blocked, at this time the pressure in the downhole water pipe 1 is smaller, the piston plate 9 is sucked to the middle of the downhole water pipe 1, the first reset spring 8 is stretched, the connecting rod 7 moves with the piston plate 9, at the same time the connecting rod 7 pulls one end of the hinged plate 11, so that the hinged plate 11 rotates, the other end of the hinged plate 11 pushes the moving plate 12 to expand outward, the moving plate 12 drives the initial filter cylinder 2 to expand outward, the gap between each group of cylinders in the initial filter cylinder 2 becomes larger, some small block impurities within a reasonable range will enter the downhole water pipe 1, so that the impurities accumulated outside the initial filter cylinder 2 are relatively reduced, which can alleviate the situation of the initial filter cylinder 2 being blocked, and some remaining large block impurities are still tightly adsorbed on the outside of the initial filter cylinder 2. With the continuous expansion of the initial filter cylinder 2, the ring sleeve 6 is pushed down by the initial filter cylinder 2, and the elastic sleeve 62 slides down along the surface of each group of cylinders, while the ring sleeve 6 and each group of scrapers 61 scrape off the large block impurities adsorbed on the outside of the initial filter cylinder 2 and the impurities stuck between each group of cylinders.

[0135] When the pressure in the downhole water pipe 1 returns to normal at the moment when the impurities are separated from the initial filter cylinder 2, the piston plate 9 drives the connecting rod 7 to return to the original position under the rebound of the first reset spring 8, the hinged plate 11 reverses and pulls the moving plate 12 back to the original position, and the initial filter cylinder 2 returns to the initial state. At this time, the ring sleeve 6 loses the restriction of the lower end of the initial filter cylinder 2, and the traction member 4 drives the scraper 61 to move upward and return to the original position under the rebound of the second reset spring 14.

[0136] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high-efficiency extraction device for deep geothermal exploitation based on coal mine geothermal energy, comprising a downhole water pipe (1) and three chambers (15, 16, and 17) located at the bottom of the downhole water pipe (1), characterized in that, Also includes: The active setting is a primary filter cartridge (2) at the bottom of the well water pipe (1) to alleviate the blockage by expanding outwards; The active components are located inside chamber 1 (15) and chamber 3 (17) and are driven by water pressure to adaptively expand and contract the primary filter cartridge (2); The scraping component is movable and sleeved outside the primary filter cartridge (2) and moves downward due to the outward expansion of the primary filter cartridge (2); The motion assembly includes a piston plate (9) movably disposed inside the first chamber (15), a rocker plate (11) rotatably disposed inside the third chamber (17), and a movable plate (12) slidably inserted into one end of the rocker plate (11). The scraping assembly includes a ring (6) that is movably sleeved on the outside of the primary filter cartridge (2); The No. 1 chamber (15), No. 2 chamber (16), and No. 3 chamber (17) are provided in several groups in equal proportion; The top of one end of the first chamber (15) is connected to the interior of the second chamber (16); The other end of the first chamber (15) is connected to the inside of the downhole water pipe (1); The third chamber (17) is located below the first chamber (15); The primary filter cylinder (2) is composed of several groups of columns distributed in equal proportions. Each group of columns is located directly below each group of the third chamber (17). The diameter of the columns decreases from top to bottom. The columns are distributed in an inclined manner. The top of each group of columns is fixedly connected to the bottom of each group of movable plates (12). The bottom end of the primary filter cylinder (2) is movably provided with a base plate (3). The bottom of each group of columns is fixed with an inverted T-shaped slider. The top surface of the base plate (3) is provided with an inverted T-shaped groove that matches the inverted T-shaped slider in equal proportions. The motion assembly also includes a connecting rod (7) that moves through the inner wall of the downhole water pipe (1). The connecting rod (7) is set in an inverted U-shape, and one end of the connecting rod (7) extends into the first chamber (15) and is fixedly connected to one side of the piston plate (9). The other end of the connecting rod (7) extends through the downhole water pipe (1) into the third chamber (17) and is slidably inserted into the other end of the rocker (11). A first reset spring (8) is fixed to the other side of the piston plate (9), and the other end of the first reset spring (8) is fixedly connected to the inner wall of the first chamber (15).

2. The high-efficiency extraction equipment for deep geothermal development based on coal mine geothermal energy according to claim 1, characterized in that: Each of the three chambers (17) is equipped with a sealing strip (5) at the bottom. The length of the sealing slide (5) is greater than the length of the moving plate (12)'s trajectory; The two ends of the sealing strip (5) extend to the inside and outside of the downhole water pipe (1), respectively.

3. The high-efficiency extraction equipment for deep geothermal development based on coal mine geothermal energy according to claim 1, characterized in that: The bottom of the downhole water pipe (1) is fixed with a limit rail (10) located directly below each set of sealing slides (5). The movable plate (12) consists of a square plate and a cross slider fixed to the bottom of the square plate; The top of the limiting track (10) is provided with a square groove that is the same size as the square plate, and the square plate slides inside the square groove; The thickness of the square groove is less than the thickness of the sealing strip (5); The bottom of the limiting track (10) is provided with a cross groove that is adapted to the cross slider, and the cross slider slides inside the cross groove.

4. The high-efficiency extraction equipment for deep geothermal development based on coal mine geothermal energy according to claim 1, characterized in that: The scraping assembly also includes a scraper (61) fixed to the bottom of the ring (6). The scraper blades (61) are arranged in several groups in equal proportion; Each set of scrapers (61) is located in the middle of the gap between every two sets of columns in the primary filter cartridge (2).

5. The high-efficiency extraction equipment for deep geothermal development based on coal mine geothermal energy according to claim 1, characterized in that: The inner wall of the ring (6) is fixed with a number of elastic sleeves (62) in equal proportion. Each set of elastic sleeves (62) engages and wraps around the outside of each set of columns in the primary filter cartridge (2); The inner wall of the elastic sleeve (62) is provided with several sets of evenly distributed balls.

6. The high-efficiency extraction equipment for deep geothermal development based on coal mine geothermal energy according to claim 1, characterized in that: A vertical pole (13) is fixed at the center of the top surface of the chassis (3). The height of the upright (13) is greater than the height of the primary filter cartridge (2); The two ends of the outer surface of the upright (13) are movably fitted with a second return spring (14); One end of each of the two sets of No. 2 return springs (14) is fixedly connected to the surface of the chassis (3) and the top of the upright (13), respectively.

7. A high-efficiency extraction device for deep geothermal development based on coal mine geothermal energy according to claim 6, characterized in that: The external sliding sleeve of the upright (13) is provided with a traction member (4); The traction component (4) consists of a sliding sleeve and long rods fixed to the outer wall of the sliding sleeve and distributed proportionally; The sliding sleeve is slidably fitted onto the outside of the upright (13); One end of the long rod is fixedly connected to the scraper (61); The other ends of the two sets of No. 2 return springs (14) are respectively fixedly connected to the two ends of the sliding sleeve.

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