Natural energy quarterly-crossing storing and taking system and mud enclosing wall manufacturing equipment

Abstract

The invention provides a natural energy quarter-crossing access system and mud enclosing wall manufacturing equipment, and belongs to the technical field of natural energy storage and utilization, and the natural energy quarter-crossing access system comprises an enclosing wall and a natural energy access unit which are arranged in underground soil and define a closed area; the enclosing wall is formed by retaining slurry generated in the grooving process of digging a deep groove in a selected area in the groove; the depth of the enclosing wall extends downwards to a clay layer below a water-bearing layer. According to the natural energy cross-seasonal storing and taking system and the mud enclosing wall manufacturing equipment, underground water is enclosed in a closed area through the mud enclosing wall, so that the underground water is prevented from flowing, an energy storage area of the underground closed area is formed, and storing and taking equipment units for storing and taking natural energy can be arranged in the closed area formed by the enclosing wall; and access of natural energy is realized. The cost of the system is greatly reduced, the soil environment is not damaged, local materials are used, the implementation process is simple, convenient and environment-friendly, and the efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of natural energy storage and utilization, and in particular to a natural energy cross-season storage and access system and mud wall manufacturing equipment. Background Art

[0002] The ambient temperature is lower in winter and there is a large amount of cold energy, while houses need to be cooled in summer. Can the heat energy collected in the summer be stored in the winter for heating or other purposes, or can the cold energy in the winter be collected and stored in the summer for use in houses or for other purposes? Can a large amount of natural energy be stored across seasons? Some professional scientific and technological personnel and folk science and technology enthusiasts have conducted a lot of exploration and research.

[0003] The invention patent with application number: 2016107589783 discloses a natural energy cross-seasonal storage and access system. This technology has certain positive effects, but the applicant found during the implementation process that the implementation of this technology requires a large scale, a large area, and a large investment, resulting in high costs. Summary of the invention

[0004] The purpose of the present invention is to provide a natural energy cross-seasonal storage and access system, aiming to solve the problem of high implementation cost of the natural energy cross-seasonal storage and access system in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a natural energy cross-seasonal storage and access system, including: a wall and a natural energy storage and access unit arranged in the underground soil and enclosing a closed area; the wall is made by retaining the mud generated in the trenching process of deep trenches in the selected area; the depth of the wall extends downward to the clay layer below the aquifer.

[0006] Furthermore, the natural energy storage and access unit includes: an infiltration well, a collection well and a heat exchange device; the infiltration well and the collection well are both arranged in the annular closed area surrounded by the wall, water flows through the seepage layer in the lower part of the infiltration well and the collection well, and the depth of the infiltration well and the collection well is less than the depth of the wall; the heat exchange device is used to extract water from the collection well and discharge it into the infiltration well after heat exchange.

[0007] Furthermore, the water collection well is located in the middle, and the water infiltration wells are evenly distributed on the periphery of the water collection well.

[0008] Furthermore, the heat exchange device includes: a water supply pipe, a water outlet pipe, a circulation pump and a heat exchanger; the heat exchanger is used to connect the water supply pipe and the water outlet pipe, and is used to perform heat exchange on the pumped groundwater, the water supply pipe is used to extract groundwater from the collection well, and the water outlet pipe is used to discharge the groundwater passing through the heat exchanger into the infiltration well.

[0009] Furthermore, the heat exchanger is a solar collector arranged outdoors and an indoor fan coil arranged indoors; or, the heat exchanger is an outdoor fan coil arranged outdoors and an indoor fan coil arranged indoors.

[0010] Furthermore, the natural energy storage and access unit includes an underground pipe, a circulation pump and a heat exchanger; the underground pipe is arranged in the annular closed area surrounded by the wall, and a heat exchange medium is arranged in the underground pipe, and the circulation pump is used to drive the medium to circulate in the underground pipe and the heat exchanger.

[0011] The beneficial effect of the natural energy cross-seasonal storage and access system provided by the present invention is that deep trenches are dug in the soil, and the mud generated during the trenching process is retained in the trench to form a wall. Since the wall extends underground, the groundwater can be enclosed in a closed area by the mud wall, thereby preventing the flow of groundwater. The bottom of the aquifer is a clay layer, and the groundwater in the closed area cannot leak either, thus forming an energy storage area in an underground closed area. The storage and access of natural energy can be achieved by setting storage and access equipment units for storing and accessing natural energy in the closed area formed by the wall. Compared with the existing freezing wall method or the cement pouring method, the wall setting method in this system has greatly reduced costs, does not damage the soil environment, uses local materials, does not need to extract all the underground mud, and only needs to retain the mud in the excavation process. The implementation process is simple, convenient, environmentally friendly, and the efficiency is greatly improved.

[0012] The present invention also provides a mud wall manufacturing device, comprising a drilling machine, a multi-section drill rod and a drill bit, wherein a plurality of wing plates are fixedly provided on the outer side of the drill rod; the wing plates are evenly arranged along the outer circumference of the drill rod.

[0013] Furthermore, the outer end of the wing plate is provided with serrations.

[0014] Furthermore, the drill rod is also provided with a limiting ring for supporting and fixing the wing plate; and / or, after multiple sections of drill rod are connected to each other, at least a nozzle is provided on the outer side of the drill rod in the middle and lower part.

[0015] Furthermore, the multiple sections of the drill rod are connected end to end, and the drill bit is connected to the drill rod at the lowest end; the multiple sections of the drill rod are all weighted drill rods; or the drill rods arranged at intervals are weighted drill rods. The beneficial effect of the mud wall manufacturing equipment provided by the present invention is that during use, the drill bit connected to the drill rod pounded the soil layer and clay layer into broken mud blocks or mud, and the drill rod also moved up and down when rotating, and the wing plate on the drill rod simultaneously pushed and scratched the side wall clay layer, sand layer, and cement layer, and pounded them into mud blocks and mud, and the drilling machine then excavated and closed according to the wall route to form an enclosed wall. The manufacturing method is simple and efficient, and the mud wall can effectively prevent groundwater from flowing to the outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of a natural energy cross-season access system provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structure of an underground wall, a water seepage well and a water collection well provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a mud wall manufacturing device provided in an embodiment of the present invention; Figure 4 for Figure 2 Cross-sectional view of the middle drill pipe along the AA direction.

[0018] In the figure: 1. Wall, 2. Water-proof layer, 3. Aquifer, 4. Collection well, 5. Seepage well, 6. Circulation pump, 7. Water pipe, 8. Outlet pipe, 9. Main pipe, 10. Solar collector; 11. Lateral deep trenching machine, 12. Drill rod, 13. Weighted drill rod, 14. Wing plate, 15. Sawtooth, 16. Limiting ring, 17. Nozzle, 18. Drill rod joint, 19. Drill bit, 20. Mud pump, 21. Drill rod angle detector. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] Please also read Figure 1 The natural energy inter-seasonal storage and access system provided by the present invention is now described. The natural energy inter-seasonal storage and access system comprises: a wall 1 and a natural energy storage and access unit which are set in the underground soil and enclose a closed area; the wall 1 is made by retaining the mud generated in the trench during the trenching process of the deep trench in the selected area; the depth of the wall 1 extends downward to the clay layer below the aquifer 3.

[0021] The beneficial effect of the natural energy cross-seasonal storage and access system provided by the present invention is that: by digging deep grooves in the soil and retaining the mud generated during the grooving process in the grooves to form a wall 1, since the wall 1 extends underground, the groundwater can be enclosed in a closed area by the mud wall 1, thereby preventing the flow of groundwater. The bottom of the aquifer 3 is a clay layer, and the groundwater in the closed area cannot leak, so an energy storage area of ​​an underground closed area is formed. The storage and access of natural energy can be achieved by setting a storage and access equipment unit for storing and accessing natural energy in the closed area formed by the wall 1. Compared with the existing freezing wall method or cement pouring method, the wall 1 setting method in this system greatly reduces the cost, does not damage the soil environment, uses local materials, does not need to extract all the underground mud, and only needs to retain the mud in the excavation process. The implementation process is simple, convenient, environmentally friendly, and the efficiency is greatly improved. In the specific implementation process, the mud should be controlled to have a higher concentration, with the standard of being able to block the aquifer 3.

[0022] As a specific implementation of the natural energy cross-season access system provided by the present invention, please refer to Figure 1 to Figure 2 , the natural energy storage and access unit includes: an infiltration well 5, a water collection well 4 and a heat exchange device; the infiltration well 5 and the water collection well 4 are both arranged in the annular closed area surrounded by the enclosure 1, and the lower parts of the infiltration well 5 and the water collection well 4 flow water through the infiltration layer, and the depths of the infiltration well 5 and the water collection well 4 are less than the depth of the enclosure 1; the heat exchange device is used to extract water from the water collection well 4 and discharge it into the infiltration well 5 after heat exchange. The enclosure 1 is located on a clay layer, and the enclosure 1 is preferably made of mud that blocks water flow, so that groundwater in the area enclosed by the enclosure 1 cannot flow to the outside of the enclosure 1. The underground soil structure is arranged in layers of aquifers 3 and clay layers, so the lower parts of the infiltration well 5 and the water collection well 4 can realize water flow through the aquifer 3, so that the water extracted from the water collection well 4 is injected into the infiltration well 5 through the heat exchange device to realize circulation. By using water as a medium to exchange heat with the outside, heat or cold energy is stored underground.

[0023] The difference between the present invention and the ground source heat pump is that the ground source heat pump is the use of soil, aquifer 3, rock formation energy storage has made some progress, which has been widely used. This technology has played a certain role in energy saving, but it still consumes more conventional energy. It exchanges heat with soil and aquifer 3 through underground pipes. The same set of underground pipes is used in summer and winter. The groundwater flows slowly, which is determined by geological conditions. Of course, it is also related to artificial exploitation of groundwater, especially near the buried pipes, there are interferences from water wells with close depths. The existing technology cannot make the soil around the buried pipes produce high or low temperatures and keep them unchanged. Therefore, the idea of ​​solving the problem of the invention is essentially different from the ground source heat pump.

[0024] For further information, see Figure 1 and Figure 2 , the water collection well 4 is located in the middle, and the seepage wells 5 are evenly distributed on the periphery of the water collection well 4. This method facilitates the uniform flow of water and allows the underground soil and water to carry more heat or cold energy. In specific implementation, several seepage wells 5 with smaller diameters can be drilled about 2 meters away from the fence 1, and the distance between the wells is generally greater than 4 meters. A water collection well 4 with a larger diameter is drilled in the central position of the fence 1, and the depth of the well is less than the depth of the fence 1. The fence 1 is to be located on a clay layer. The depth of the fence 1 and the area inside the fence 1 are to be determined according to the required amount of heat or cold storage energy.

[0025] As a specific implementation of the natural energy cross-season access system provided by the present invention, please refer to Figure 1 and Figure 2 The heat exchange device includes: a water pipe 7, a water outlet pipe 8, a circulation pump 6 and a heat exchanger; the heat exchanger is used to connect the water pipe 7 and the water outlet pipe 8, and is used to perform heat exchange on the extracted groundwater. The water pipe 7 is used to extract groundwater in the water collection well 4, and the water outlet pipe 8 is used to discharge the groundwater that has passed through the heat exchanger into the seepage well 5. The area enclosed by the fence 1 is a huge energy absorption area. By setting up pipelines (water pipe 7 and water outlet pipe 8) and a circulation pump 6, the groundwater stored in the fence 1 can be effectively mobilized and circulated, so that the storage and release of natural energy can be achieved through the action of the heat exchanger. Specifically, the circulation pump 6 can be set in the water collection well 4. A circulation pump 6 is set in the water collection well 4 to extract water from the water collection well 4 and input it into the heat exchanger. The heat exchanger can be a solar collector 10 or a fan coil unit. When it is used to store heat, the circulation pump 6 is connected to the solar collector 10, and when it is used to store cold, the circulation pump 6 is connected to the fan coil unit.

[0026] As a specific implementation of the natural energy cross-season access system provided by the present invention, please refer to Figure 1 The heat exchanger is a solar collector 10 arranged outdoors and an indoor fan coil (not shown in the figure). In spring, summer and autumn, the solar energy resources are good. The circulating pump 6 extracts water from the water collection well 4 through the water pipe 7 to the solar water heater for heating, and then discharges it into the seepage well 5 through the outlet pipe 8. The water level of the seepage well 5 rises, and the water level of the water collection well 4 drops. Under the action of the water level difference, it flows through the aquifer 3 to the water collection well 4, and continuously circulates to bring heat energy to the aquifer 3, and the aquifer 3 transfers it to the clay layer (aquiclude 2). In this way, the groundwater, soil and other materials are heated up, and the collected solar energy can be transported underground for storage.

[0027] In winter, the indoor fan coil (not shown) connected in parallel with the solar water heater can use the stored heat energy. The circulation pump 6 transfers the hot groundwater through the water pipe 7 to the indoor fan coil. After the indoor fan coil provides heat, the water flows into the infiltration well 5 through the outlet pipe 8. This cycle can provide heating in cold weather.

[0028] In a specific implementation process, the solar collector 10 can also collect solar energy during the day in winter, and then directly supply it to the indoor fan coil for heating, and use the stored solar energy at night or on cloudy days. In this way, the heat storage temperature can reach about 75°C, and the low temperature after use is 40°C. The usable temperature difference range is about 35°C. There is no need for heat pump relay for winter heating, saving the investment cost and operation cost of the heat pump.

[0029] As a specific embodiment of the natural energy cross-season storage and access system provided by the present invention, the heat exchanger is an outdoor fan coil unit (not shown in the figure) arranged outdoors and an indoor fan coil unit (not shown in the figure) arranged indoors. The outdoor fan coil unit and the indoor fan coil unit are connected in parallel to the water delivery pipe 7 and the water outlet pipe 8. This arrangement can store cold energy in winter.

[0030] The circulating pump 6 draws water from the water collection well 4 through the water pipe 7 to the outdoor fan coil unit, and exchanges heat with the external connection. After the water temperature is reduced, it is discharged into the seepage well 5 through the outlet pipe 8. The water level of the seepage well 5 rises, and the water level of the water collection well 4 drops. Under the action of the water level difference, it flows to the water collection well 4 through the aquifer 3 below, and continuously circulates to reduce the temperature of the aquifer 3. The aquifer 3 then cools the clay layer (aquiclude 2). In this way, the heat of groundwater and soil and other materials is exchanged to the external connection to achieve cold storage. It should be noted here that it is necessary to ensure that the water cannot freeze, and the groundwater temperature can be close to 0°C.

[0031] When cooling is needed in summer, the circulation pump 6 pumps cold groundwater through the water pipe 7 to the indoor fan coil unit. After heat exchange in the indoor fan coil unit, the water flows into the infiltration well 5 through the outlet pipe 8. This cycle can provide cooling when the weather is hot.

[0032] As a specific implementation of the natural energy cross-season access system provided by the present invention, please refer to Figure 1 and Figure 2 When the number of infiltration wells 5 is large, a main pipe 9 can be connected to the outlet pipe 8, and then branch pipes corresponding to the number of deep water wells can be set on the main pipe 9. The ring pump works to extract water from the water collection well 4 into the heat exchanger and then passes through the outlet pipe 8, the main pipe 9, and the branch pipes to each infiltration well 5.

[0033] As another specific embodiment of the natural energy cross-seasonal storage and access system provided by the present invention, the natural energy storage and access unit includes a buried pipe, a circulation pump 6 and a heat exchanger; the buried pipe is arranged in the annular closed area surrounded by the wall 1, and a heat exchange medium is arranged in the buried pipe, and the circulation pump 6 is used to drive the medium to circulate in the buried pipe and the heat exchanger. Using this method to store cold is better than using the water circulation of the aquifer 3 to store cold, because using the buried pipe method to store cold can change the medium in the buried pipe to an antifreeze night, and the cold storage temperature can be lower than 0°C. The phase change of water can be used to turn water into a solid state to store more cold energy. For details, please refer to the arrangement of indoor fan coils and outdoor fan coils recorded in the invention patent with the prior application number: 2016107589783.

[0034] See also Figure 3 and Figure 4 The present invention also provides a mud wall 1 manufacturing device, including a drilling machine, a multi-section drill rod 12 and a drill bit 19, wherein a plurality of wing plates 14 are fixedly provided on the outer side of the drill rod 12; the wing plates 14 are evenly arranged along the outer circumference of the drill rod 12.

[0035] The beneficial effect of the mud wall manufacturing equipment provided by the present invention is that during use, the drill bit 19 connected to the drill rod 12 pounded the soil layer and clay layer into broken mud blocks or mud, and the drill rod 12 also moved up and down when rotating, and the wing plate 14 on the drill rod 12 simultaneously pushed and scratched the side wall clay layer, sand layer, and cement layer, and pounded them into mud blocks and mud, and the drilling machine then excavated and closed along the route of the wall 1 to form an enclosed wall 1. The manufacturing method is simple and efficient, and the mud wall 1 can effectively prevent groundwater from flowing to the outside.

[0036] As an embodiment of the mud wall making equipment provided by the present invention, please refer to Figure 3 and 4 Each section of the drill pipe 12 is provided with four to eight wing plates 14, and the outer end of the wing plate 14 is provided with saw teeth 15. The diameter of the drill bit 19 is larger than the maximum outer diameter of the circle of revolution where the saw teeth 15 are located on the outer edge of the wing plate 14. In this way, when drilling, the drill bit 19 is responsible for drilling, and the wing plate 14 is responsible for scraping clay and other materials on the well wall, making it easier to mix the mud.

[0037] As an embodiment of the mud wall making equipment provided by the present invention, please refer to Figure 3 The drill pipe 12 is also provided with a stop ring 16 for supporting and fixing the wing plate 14. The stop ring 16 is used to prevent the wing plate 14 on the drill pipe from cutting into the side wall of the well too much when the drill pipe rotates, so as to prevent the drill pipe from being damaged by excessive resistance.

[0038] The diameter of the limit ring 16 is smaller than the maximum outer diameter of the circle of revolution where the saw teeth 15 are located on the outer edge of the wing plate 14, limiting the grinding distance of the saw teeth 15. More than two limit rings 16 can be set on each drill rod 12, and the specific limit can be set according to actual needs. The width of the limit ring 16 along the axis of the drill rod is greater than 1 cm. The limit ring 16 can also strengthen the strength of the wing plate 14, making it more reliable to use.

[0039] As an embodiment of the mud wall making equipment provided by the present invention, please refer to Figure 3 , multiple sections of the drill rod 12 are connected end to end, and the drill rods 12 are connected by drill rod joints 18; the drill bit 19 is connected to the lowermost drill rod 12; multiple sections of the drill rod 12 are weighted drill rods 12; or, the drill rods 12 arranged at intervals are weighted drill rods 12. The weighted drill rod 12 is heavier than the ordinary drill rod 12. The weighted drill rod 12 can provide lateral drilling force when the drill rod 12 is tilted, and can make it easier for the wing plate 14 to simultaneously push and scratch the clay layer, sand layer, and clay layer of the side wall, and crush them into mud blocks and mud.

[0040] Further, see Figure 3 After multiple sections of drill pipes are connected to each other, at least a nozzle is provided on the outer side of the middle and lower parts of the drill pipes to mix the mud evenly and make a usable mud wall.

[0041] Further, see Figure 3 The drilling machine is also provided with a drill pipe angle detector 21. The drilling machine has the function of driving the drill pipe 12 to rotate and move up and down, and can also detect the inclination of the drill pipe 12, and adjust the translation speed of the drilling machine at any time according to the inclination. When the inclination of the drill pipe 12 is large, the translation speed of the slotting machine is slowed down, and vice versa, the translation speed is faster. Generally, the inclination of the drill pipe 12 is controlled between 30 degrees and 35 degrees.

[0042] Working principle of drilling machine: We know that the existing well drilling equipment is generally used to drill vertical holes, and special ones can also drill inclined holes. It uses the gravity of the drill pipe 12 and the rotational force of the drill pipe 12 to work together on the drill bit 19 to crush and grind the soil layer and clay layer into broken mud blocks or mud. Under the action of the mud pump 20, the mud carries the broken mud blocks, sand particles, etc. to the mud sedimentation tank on the ground. The heavier sand particles and mud blocks are precipitated, and the thinner mud is transported to the drill bit 19 through the mud pump 20 and the drill pipe 12 to be ejected over and over again. The wellbore is excavated. This process excavates vertical holes or inclined vertical holes (in other words, vertical wellbore and inclined wellbore).

[0043] When the wall of this scheme is in a vertical or inclined direction, a drilling machine is used to drill holes along the predetermined position of the enclosure 1, and a plurality of wing plates 14 are provided on the outer side of the integral drill rod 12. The outer end of the wing plate 14 is a sawtooth 15, and the outer diameter of the sawtooth 15 is the width of the slot. A nozzle 17 is also provided at the connection of the drill rod 12. The nozzle 17 can be made by drilling a hole directly on the drill rod, and is used to spray water or mud when the drill rod rotates. The upper part of the drill rod may not be provided, and a nozzle 17 is provided at each section starting from the middle. The entire toothed drill rod 12 rotates continuously, and the drill rod 12 also moves up and down when rotating, and simultaneously pushes and cuts the clay layer, sand layer, and cement layer of the side wall, and crushes them into mud blocks and mud. Under the action of the mud pump 20, the mud brings the broken mud blocks, sand particles, etc. to the mud sedimentation tank on the ground. The sand particles and broken mud blocks are precipitated, and the thinner mud is pressed into the drill rod 12 again through the mud pump 20. As the length of the slot increases, the broken mud and sand particles are sandwiched by the thicker mud, and part of the mud and sand are deposited in the slot far away from the drill rod 12. The drilling machine keeps working, digging and closing along the originally designed route of the wall 1, and the lack of mud in the slot is backfilled with mud from the sedimentation tank, so as to obtain the wall 1 (water blocking wall) made of mud. When drilling the seepage well 5 and the water collection well 4, the ordinary drill bit 19 is replaced for drilling.

[0044] The present invention also provides a specific implementation method, firstly, a vertical hole is drilled using a common drilling scheme, the hole diameter of which is slightly larger than the width of the deep groove, the drill rod 12 of the slotting machine is lowered into the vertical hole, the drilling machine and the mud pump 20 are started, and the slotting machine rotates and translates at the same time to gradually tilt the drill rod 12, and the drill rod 12 is adjusted to an inclination angle of 30 to 35 degrees, and the lateral force decomposed by the gravity of the tilted drill rod 12 is used as the power for digging the deep groove.

[0045] Then, the drill rod 12 with the wing plate 14 is used for drilling. The wing edge is designed to be serrated, and the outer diameter of the serration 15 is the width of the slot. A nozzle 17 is also provided at the connection of the drill rod 12. The upper part may not be provided, and a nozzle 17 is provided at each section starting from the middle. The entire drill rod 12 with the serration 15 rotates continuously, and the drill rod 12 also moves up and down when rotating, and simultaneously pushes and cuts the clay layer, sand layer, and cement layer on the side wall, crushes them into mud blocks and mud. Under the action of the mud pump 20, the mud brings the broken mud blocks, sand particles, etc. to the mud sedimentation tank on the ground. The sand particles and broken mud blocks are precipitated, and the thinner mud is pressed into the drill rod 12 again through the mud pump 20. As the length of the slot increases, the broken mud and sand particles are sandwiched by the thicker mud, and part of the mud and sand are deposited in the slot far away from the drill rod 12. The drilling machine keeps working, digging and closing along the originally designed route of the wall 1, and backfilling the lack of mud in the slot with mud from the sedimentation tank, so as to obtain the mud-made wall 1 (water-blocking wall). Then replace the ordinary drill rod 12 and use the same method to make a seepage well 5 with a well spacing of about 4 meters from the inner circle of the wall 1, and drill a pot-cone well with a larger diameter in the center of the wall 1 as a water collection well 4. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A natural energy cross-season storage and access system, characterized in that: include: Walls and natural energy storage and access units set in the underground soil and enclosing a closed area; The wall is made by retaining mud in the trench produced during the trenching process of deep trenches in the selected area; the depth of the wall extends downward to the clay layer below the aquifer.

2. The natural energy cross-season storage and access system according to claim 1, characterized in that: The natural energy storage and access unit includes: an infiltration well, a collection well and a heat exchange device; the infiltration well and the collection well are both arranged in the annular closed area surrounded by the wall, water flows through the seepage layer in the lower part of the infiltration well and the collection well, and the depth of the infiltration well and the collection well is less than the depth of the wall; the heat exchange device is used to extract water from the collection well and discharge it into the infiltration well after heat exchange.

3. The natural energy cross-season storage and access system according to claim 2, characterized in that: The water collection well is located in the middle, and the water infiltration wells are evenly distributed on the periphery of the water collection well.

4. The natural energy cross-season storage and access system according to claim 2, characterized in that: The heat exchange device includes: a water supply pipe, a water outlet pipe, a circulation pump and a heat exchanger; the heat exchanger is used to connect the water supply pipe and the water outlet pipe, and is used to perform heat exchange on the pumped groundwater, the water supply pipe is used to extract groundwater in the water collection well, and the water outlet pipe is used to discharge the groundwater passing through the heat exchanger into the infiltration well.

5. The natural energy cross-season storage and access system according to claim 4, characterized in that: The heat exchanger is a solar collector arranged outdoors and an indoor fan coil arranged indoors; or, the heat exchanger is an outdoor fan coil arranged outdoors and an indoor fan coil arranged indoors.

6. The natural energy cross-season storage and access system according to claim 1, characterized in that: The natural energy storage and access unit includes an underground pipe, a circulation pump and a heat exchanger; the underground pipe is arranged in the annular closed area surrounded by the wall, a heat exchange medium is arranged in the underground pipe, and the circulation pump is used to drive the medium to circulate in the underground pipe and the heat exchanger.

7. A mud wall making device, comprising a drilling machine, a multi-section drill rod and a drill bit, characterized in that: A plurality of wing plates are fixedly provided on the outer side of the drill rod; the wing plates are evenly arranged along the outer circumference of the drill rod.

8. The mud wall making equipment according to claim 7, characterized in that: The outer end of the wing plate is provided with saw teeth.

9. The mud wall making equipment according to claim 7, characterized in that: The drill rod is also provided with a limiting ring for supporting and fixing the wing plate; and / or, after multiple sections of drill rod are connected to each other, at least a nozzle is provided on the outer side of the drill rod in the middle and lower part.

10. The mud wall making equipment according to claim 7, characterized in that: The multiple sections of drill rod are connected end to end, and the drill bit is connected to the drill rod at the lowest end; the multiple sections of drill rod are all weighted drill rods; or the drill rods arranged at intervals are weighted drill rods.

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