CN117404007A

CN117404007A - Gravity head

Info

Publication number: CN117404007A
Application number: CN202311523477.3A
Authority: CN
Inventors: 施国樑
Original assignee: Taizhou Changtian Energy Technology Co ltd
Current assignee: Taizhou Changtian Energy Technology Co ltd
Priority date: 2019-07-10
Filing date: 2019-07-10
Publication date: 2024-01-16
Also published as: CN110318662B; CN110318662A; CN117404008A

Abstract

The gravity head is used for manufacturing a U-shaped well device for heat exchange with soil by sinking a traction well pipe and is characterized by comprising a drag reduction surface and a water supply network; the drag reduction surface comprises a plurality of outlet holes; the outlet is sequentially communicated with a water supply network, a valve, a water supply pipe and a water supply source; the water is discharged from each outlet hole, the water is discharged to enable soil slurry on the drag reduction surface to be slurried, the boundaries of soil are washed and dispersed by the water to continuously retreat, and the water is discharged to form a fluid thin layer on the drag reduction surface; the fluid thin layer reduces the travelling resistance of the gravity head in soil; the gravity head comprises a connecting interface with the well pipe semicircular section; and realizing transmission connection with the well pipe semicircular section through the connecting interface, and pulling the well pipe to sink.

Description

Gravity head

Technical Field

The invention relates to a gravity head U-shaped well drilling method and equipment product.

Background

Compared with an air source heat pump system, the heat pump cooling and heating system which uses a soil heat storage and heating system to provide a low-temperature heat source and a cold source has the advantages of insensitivity to temperature change in winter, capability of directly supplying a large amount of cold energy in summer and the like;

a residential area in north of China adopts a mode of excavating the whole soil for more than ten meters deep, paving underground heat exchange pipelines and backfilling to arrange a replacement heat well underground. The heat exchange effect is good. But the excavation and the transportation of a large amount of earthwork are not friendly to the environment, and the restriction of the field condition comprises that the construction cannot be carried out under the existing building and in the section where a large amount of underground pipe network passes; and as the excavation depth increases, the excavation difficulty increases rapidly; digging 10 meters in areas with high groundwater level is not easy;

The method for arranging the soil source heat exchange well by ditching and embedding the iron pipe has the problems of excavating a large amount of earthwork and affecting the environment;

there is a method for setting a soil source heat exchange well: forming a vertical well with a diameter of 130-150 mm and a depth of about 15 m, placing a U-shaped pipe with a diameter of 25, such as a PE-X pipe, in the vertical well, and filling a mixture of fine sand and excavated soil into the vertical well to construct a U-shaped well; and a plurality of U-shaped wells are used for constructing a soil source storage cooling and heating system for constructing a soil source heat pump heating system. The preliminary test has a certain effect. However, if the depth of the U-shaped well is 10 meters or more, the distance between the two vertical sections is too short, the thermal resistance is too small, and serious thermal short circuit is caused; the cold and heat energy is difficult to input and output;

the soil heat storage and heat storage system adopts two vertical sections of a U-shaped heat exchange well as an input pipeline and an output pipeline of a heating medium, and the larger the distance between the two vertical sections is, the larger the thermal resistance is and the lighter the thermal short circuit phenomenon is; for a U-shaped well with the depth of more than 40 meters, the distance between two vertical sections, namely a heat medium input pipeline and a heat medium output pipeline, is required to be more than or equal to 1 meter so as to reduce the phenomenon of thermal short circuit;

the U-shaped heat exchange well with the distance between two vertical sections enlarged to the meter level and extremely small thermal short circuit phenomenon is arranged in the soil, the earthwork quantity related to the well with the round cross section is still too large, and a new technology needs to be developed.

Disclosure of Invention

One of the purposes of the invention is to provide a gravity head U-shaped well drilling method.

The invention relates to a method for drilling a U-shaped well by a gravity head, which comprises the following steps: the well drilling machine comprises a U-shaped well drilling machine, wherein the U-shaped well drilling machine comprises a gravity head, a winch, an operation pipeline module, a well pipe box, a water supply source and a control system;

the hoist is in transmission connection with the gravity head through a sling and can pull up the gravity head at any time to return; the gravity head is in transmission connection with the well pipe, and part of gravity of the gravity head is transmitted to the ground through the well pipe; the gravity head can be separated from the well pipe at any time;

the operation pipeline module receives and releases an operation pipeline; the working pipeline comprises a water supply pipe and a cable; the well pipe can be taken out from the well pipe box for use;

setting the surface of part or all of the gravity head, which is rubbed with soil, as a drag reduction surface; the drag reduction surface comprises a plurality of outlet holes; the outlet is sequentially communicated with a water supply network, a valve, a water supply pipe and a water supply source; the gravity head comprises a water supply pipe network; the water supply network is communicated with the outlet and the water supply pipe;

the water supply source comprises a pressurized water source or air source; the water supply source defaults to a pressurized water source;

when a well is dug, the outlet holes are enabled to output water, the water is discharged to enable soil on the drag reduction surface to be slurried, the boundary of soil is washed by the water to be dispersed and continuously retreated, and a high-fluidity regional fluid thin layer is formed between the soil boundary and the drag reduction surface; the fluid thin layer reduces the resistance of soil to the sinking of the gravity head; the slurried soil which partially forms the fluid thin layer, namely the fluid thin layer, upwards gushes to the ground; the gravity head pulls the well pipe to sink by utilizing the gravity of the gravity head and finally forms a U-shaped well penetrating into soil; the U-shaped well consists of two vertical sections and a semicircular section;

The slurried soil, which partially forms the fluid sheet, is fluid sheet because it has a density less than that of the soil in the subsurface site and is upwelled to the surface under the pressure of the surface of the subsurface well construction.

The fluid sheet still presents less resistance to the returning gravity head for a short period of time, including half an hour, because of the time required for the water content to drop.

In one possible design, the well drilling machine includes a press boosting device; the press boosting device comprises two presses, a group of two push rods and an increasing and decreasing manipulator; the press comprises a lifting pressing plate; the two ends of the push rod are respectively connected with the lifting pressing plate and the gravity head in a transmission way, so that the force of the lifting pressing plate is transmitted to the gravity head and can be pulled up by the lifting pressing plate;

in one possible design, when the gravity head is returned, 20-80% of the water yield is used for drag reduction when the outlet hole is kept sinking;

in one possible design, the working pipeline of the well drilling machine comprises a slurry returning pipe, the drag reducing surfaces on the gravity head and a plurality of inlet holes; the gravity head comprises a slurry return pipe network for connecting each inlet hole with the slurry return pipe; and returning part or all of the fluid thin materials to the ground through the inlet hole, the slurry return pipe network and the slurry return pipe in sequence.

In one possible design, the service line includes a cable that communicates between the power source and the power load of the gravity head, or is used to transmit weak electricity.

In one possible design, a water supply pipe provides hydraulic energy to the site; for driving the hydraulic element on the gravity head.

In one possible design, the well drilling machine includes a negative pressure source disposed at the surface; when a slurry return pipe is adopted; the slurry return pipe is communicated with a negative pressure source; the negative pressure source comprises a pit having a bottom and a fluid level below ground.

The beneficial effects are that: the heat pump cooling and heating system utilizing soil to store cold and heat is characterized in that the heat pump cooling and heating system utilizes a heat supply area of a user to be 100 square meters, a cooling and heating period to be 100 days, a heat pump system COP to be 3.5 and heating power to be 70 watts per square meter, a soil cold-storage heat body is required to supply heat for 50 watts per square meter every day in the heating period, the output of a heat pump unit is 20 watts per square meter, and the total amount of cold and heat stored by the heat pump unit is 4.32 x 10 ¹⁰ J. At every m ³ Volumetric specific heat of soil 2.35 x 10 ⁶ J(m ² *K)(1.2～3.5*10 ⁶ J(m ² * K), the heat exchanging well depth is 50 m, the heat storage body absorbs and releases heat at 16 ℃, the cross section of the cold storage body is about 22.98 square meters, namely the house occupies 23 square meters, and the cold storage body is suitable for high-rise residential dense areas. The method comprises the steps of 3U-shaped wells, wherein the cross section area of a heat exchange body calculated by the U-shaped wells is 7.66 square meters, and the distance between two vertical sections of the U-shaped wells is 2 meters. (if the cold and warm area is changed to 70 square meters, the heating power is changed to 100 watts/square meter, and the final conclusion of the section is still true);

In the cold supply season, the direct cooling temperature is 0-12 ℃, the total cooling time is 100 days, the average cooling area of a house is 100 square meters per house, and about 37.5 watts of cooling capacity can be used for direct cooling and dehumidification. If the cooling is provided for 16 hours on average per day, then about 56.25 watts per square meter of cooling is provided for 16 hours. Millions of large-calorie cold energy additionally generated by using the heat pump to produce hot water in non-heating seasons are used for resisting the cold accumulation heat efficiency loss of the U-shaped well subsystem. The soil heat-storage system constructed by the U-shaped well can reduce a large amount of air-conditioning time in summer, and is very effective for reducing the peak power consumption in summer. The solar energy is adopted to input heat energy into the soil heat-storage and heat-storage system which heats up after cooling in summer, so that the heat can be greatly increased for winter use. The soil source heat pump heating system is insensitive to air temperature, and heating can be ensured in the cold tide; the motor power of the heat pump system is only 2105 watts according to the unit temporary load ratio of 0.95, and the household average electric power is only about 2.239 kilowatts according to the three-phase motor efficiency of 0.94; is very friendly to the power grid. In contrast, when a cold tide comes, the actual COP of the empty water supply source heat pump system drastically decreases, even below 2, and thus the demand for electric power is multiplied at this time. However, the basic heating temperature can not be reached in the whole area, because the electric energy supply in the whole area of the majority of China can not be increased by times;

The heat pump cooling and heating system which adopts the U-shaped well to provide a low-temperature heat source is insensitive to cold and damp cooling, so that the electric power for heating the indoor unit can be limited to about 2.4 kilowatts, and the requirement can be met in more than 95% of areas in China at present. And the heating of the users is 2.4 kilowatts, and the electric air conditioner is rarely used in summer. The peak electricity utilization is hardly generated, so that the benefit of the power grid is much better, and the emission of greenhouse gases is greatly reduced.

The U-shaped well soil cold and heat storage system is also suitable for cold storage air conditioning systems in non-heating areas. Compared with ice cold accumulation, the U-shaped well soil cold accumulation system has the advantages that the cold accumulation body is large, the specific surface area is small, and the efficiency of the refrigerating unit can be improved by about 30% due to the fact that the average cold accumulation temperature of 6 ℃ is 7.5 ℃ compared with the ice cold accumulation temperature. The cold accumulation amount of one U-shaped well in one cold accumulation period is 4.5 x 10 based on the temperature difference of 5 DEG C ⁹ J. The efficiency of the cold storage system is 80 percent and the cold load is 100 watts per hour per day and 12 hours per square meter, and each well can be used for cooling 833 square meters;

the total heat exchange area of the U-shaped well with 3 openings and 50 meters depth is 26.88 square meters based on the PE-X pipe with the inner diameter of 0.0276 meter and the heat exchange area of 0.087 square meters per meter length. In a heating season of 100 days, the heat exchange load of the surface of the U-shaped well is 185W/square meter; the heat exchange temperature difference and the heat exchange efficiency are not discussed in depth here. In the cold supply season, the heat exchange load on the surface of the U-shaped well is similar;

The invention is expected to realize that each U-shaped well with the depth of 50 meters costs 400 yuan and 3 well users pay 2100 yuan in total. The heat pump electricity charge is 2160 yuan (4.32×10) in one cooling season calculated by 0.6 yuan/degree of electricity charge, COP=3 of refrigerating unit and 0.9 of cold accumulation heat efficiency ¹⁰ *0.9/3/3600/1000 x 0.6), saving heat pump electricity consumption in winter because of high cold-heat storage temperature by 20% of total heat storage capacity and 0.3 yuan/degree electricity charge of 2400 degree (4.32 x 10) ¹⁰ *0.2/3600/1000 x 0.3) saves 720 yuan of electricity charge. The investment is withdrawn at an average apportionment of about 8.75 months throughout the year (2100/2880). In the area with 0.5 yuan/degree of electricity charge in winter, heating in winter saves 1200 yuan of electricity charge; recovering the investment for 7.5 months; the investment is recovered in 4.2 months according to 1 yuan/degree of annual electricity charge.

Cold storage air conditioning system, refrigeration cop=3, peak clipping 78.125 kw/well 16 hours in daytime. U-shaped well heat exchange load: 8718W/square meter (4.32 x 10) ¹⁰ * 5/16/3/3600/16/8.961). Larger and the heat exchange load is increased by 1 time at 8 hours at night. Therefore, the heat exchange area of the U-shaped well of the cold-storage heat body is increased, and the U-shaped well is formed by multiple U-shaped wells or deeper U-shaped wells. The length of the U-shaped well pipe is increased by 5 times, and the electricity consumption is 1250 kilowatt hours in 16 hours in the daytime. The economic benefit of 100 days is 33750 yuan (1250, 0.9, 0.3, 100) calculated by the electricity charge difference of 0.3 yuan/degree and the cold-storage heat efficiency of 0.9; the investment of 3500 yuan for 5 wells was recovered about 9.64 days.

The distance between two vertical sections of the U-shaped well is far greater than 100 (130-30) mm, including about 2000 mm, and even if the depth of the U-shaped well reaches about 100 m, the thermal short circuit phenomenon and the internal impedance of the heat storage body can be ignored, and the heat energy accessing efficiency can meet the requirements of most of purposes.

The gravity head with drag reducing surface of the invention is capable of sinking in most soil at a rate greater than 0.3 meters per minute; the gravity head can realize well drilling with the depth of 100 meters without using moving parts, and the space of the gravity head for moving soil is extremely small and is close to a theoretical limit value; the turnover drag reduction surface enables the gravity head to have a right angle front end, so that the well drilling speed is higher, and the rejection capability to small stones is stronger; the U-shaped well drilling machine with the wedge-shaped sand opening device has no movable part and is insensitive to stones.

The operation cost of the U-shaped well drilling machine for drilling the U-shaped well is as low as 59-100 yuan, which is 50 meters deep and two vertical sections are 2 meters away, so that the technical problem of building a thermal short circuit free U-shaped well soil source heat storage body system which is needed to be solved urgently in society but is not solved for a long time is solved;

the U-shaped well soil source heat storage body system does not need a large amount of excavation and does not influence existing underground objects including underground pipelines; the construction workload is small, and the method is environment-friendly;

The water supply source comprises a pressurized air source, namely, the air is adopted to replace water as a pressure source to construct a fluid thin layer for reducing drag, the air can loosen soil, enable a soil interface to retreat, reduce the sinking resistance of well construction facilities and well pipes, has the beneficial effect of being capable of drilling U-shaped wells in sand and stone soil with strong water permeability, and is suitable for areas with leaking water or water sources in shortage.

Drawings

FIGS. 1a and 1b are schematic diagrams of a U-shaped well drilling machine during the early stage and completion of the drilling operation; FIG. 1c is a semi-sectional view of a gravity head, and FIG. 1d is a side cross-sectional view of a gravity head;

FIGS. 2a, 2b are an exploded view and a side view block diagram, respectively, of a multiple plate drag reducing surface;

FIGS. 3a, 3b are two views of a gravity head laterally pushing out a semicircular section of well tubing;

FIG. 4 is a schematic view of a structure in which an elastic plate bulges out of a semicircular section;

FIG. 5 is a schematic illustration of the construction of a well casing;

FIG. 6 is a design drawing of distributed exit and entry apertures in a drag reducing surface;

FIG. 7 is a front view of a push rod boosting well drilling machine;

FIG. 8 is a composite cross-sectional view of a pushrod, side elevation intermediate composite cross-section;

FIG. 9 is a composite cross-section of a casing installation of an integrated well drilling and insulating casing installation machine, in front view;

FIG. 10 is a schematic diagram of the operation of a well construction and insulation sleeve assembly machine;

FIGS. 11a and 11b are front and top views, respectively, of an integrated well drilling and insulating casing assembly machine;

FIG. 12 is a schematic illustration of a construction for using a telescoping strap to tie adjacent insulated casing sections;

FIG. 13 is a schematic view of the construction of one cartridge segment connected to another cartridge segment and tray, respectively;

FIG. 14 is a top view of a tray;

figures 15a and 15b are front and partial side views, respectively, of a gravity head of an insulation displacement device inserted into the ground;

FIG. 16 is a top view of a U-well soil heat storage system;

FIG. 17 is a perspective view of a U-well soil heat and cold storage system;

FIG. 18 is a schematic block diagram of a cooling and heating system with a U-well soil heat storage system;

FIG. 19 is a schematic diagram of a multi-temperature U-well soil heat and cold storage system agricultural greenhouse.

The gravity head is shown in the figure 1; 2, a winch; 3, operating a pipeline module; 4, a well pipe box; 5 slings; 6, well pipe; 7, operating a pipeline; 8, a water supply pipe; 9 semicircle sections; 10 drag reducing surfaces; 11, hole outlet; 12 a water supply network; 13 pits; 14 dam barrels; a 15U-shaped well; 16 vertical sections; 17 clay; 18 boundary; a thin layer of fluid 19; 20 plugs; 21, an engineering vehicle; a 22 rack; 23 a slurry return pipe; 24 holes; 25 a slurry return pipe network; 26 fins; 27 stone blocks; 28 semicircle segment guard; 29 a first replica; a second replica board 30; 31 a third compound plate; 32 channels; 33 rivet; 34 fluid passages; 35 through hole sleeves; a 36 nozzle; 37 jumping pipes; 38 demagnetizing device; 39 semicircle segment caulking groove; 40 elastic plates; 41 a movable fence; 42 electric fence jacks; 43 screw propellers; 44 well pipe discs; 45 well pipe straightener; 46 tubes; 47 rows of holes; 48 rows of holes; 49 push rod; 50, increasing or decreasing the manipulator; a 51 press; 52 pushing the rod member; 53 winged edges; a 54 dot-dash line; 55 lifting press plates; 56, increasing and decreasing the mechanical arm; 57 sleeve protection tube; 58 a second U-well; 59 insulating sleeves; 60 insulating sleeve segments; 61 hook tab; 62 grooves; 63 trays; 64 plug connectors; 65 seals; 66 tray links; 67 wire rope; 68 wire rope winding and unwinding discs; 69 a protective tube section; 70 a threaded connection interface; 71 a connector; 72 containers; 73 positioning a tube; 74 a telescopic belt; 75 fastener holes; 76 surging a slurry layer; 77 insulating panels; 78 pallet; 79 mother tubes; 80 temperature measuring optical fiber; 81 a structure; 82 heat exchange interface; 83 heat pump units; 84 cooling facilities; 85 a first array of U-shaped wells; 86 a second array of U-shaped wells; 87 agricultural greenhouses; 88 circulation pumps; 89 water tube radiator.

Detailed Description

The second purpose of the invention is to provide a U-shaped well drilling machine.

This object of the invention is achieved by an embodiment 1 as given in fig. 1.

Example 1, a U-shaped well drilling machine is manufactured; comprises a gravity head 1, a winch 2, an operation pipeline module 3, a well casing 4, a water supply source and a control system;

the hoist 2 is connected with the gravity head 1 in a transmission way through a sling 5 and can pull up the gravity head at any time to return. The gravity head is in transmission connection with the well pipe 6; a part of gravity of the gravity head is transmitted to the ground through the well pipe; the gravity head can be separated from the well pipe section at any time;

the working line module 3 receives and releases the working line 7. The working pipeline module 3 comprises a working pipeline disc and a working pipeline disc driving mechanism; coiling an operation pipeline 7 on the operation pipeline coil; the operating pipe wire coil driving mechanism drives the operating pipe coil to retract and pay-off the operating pipe;

the service line comprises a water supply pipe 8 and a cable; one end of the water supply pipe 8 is connected with a gravity head; the other end of the working pipe coil is connected with a fluid source through a rotary pipe joint and is used for conveying pressurized water or gas to the site; the water supply pipe comprises a commercially available pressure-resistant rubber pipe;

the well pipe 6 stored in the well pipe box 4 can be pulled out for use; the well pipe comprises a PE-X pipe;

The mass range of the gravity head comprises 10-250 kg. The gravity head 1 in example 1 looks like a nail-shaped article with an inverted U-shaped cross section from the side. This design allows the gravity head to ride over the semicircular section 9 of the well pipe, with most of the weight of the gravity head being transferred through the well pipe to the surface; when the gravity head is pulled up, the gravity head is directly separated from the semicircular section;

the gravity head in example 1 is triangular with a sharp corner downward when viewed from the front; a part or all of the surface of the gravity head which is rubbed with the soil is provided as a drag reduction surface 10; the drag reducing surface comprises a plurality of outlet holes 11; a gravity head and comprising a water supply network 12; the water supply network is communicated with the outlet and the water supply pipe; the outlet is sequentially communicated with a water supply network, a valve, a water supply pipe 8 and a water supply source;

preparation before well drilling: a pit 13 is dug at the position to be drilled and a dam 14 is provided in the pit. The cross-sectional shape of the pit is not limited to include an ellipse shape and an elongated shape; the depths of the pits and the dam cylinders are determined according to site conditions and the size of a main pipe comprising the well pipe from the ground; and the earth slurry rushing to the ground is positioned in the dam cylinder. The slurry is pumped away as soon as possible by a slurry pump to keep the lower liquid level; the lower head pressure of the liquid against the upwelling slurry is smaller, so that the slurry is easier to upwelle, and the suction effect of the negative pressure source is achieved. The slurry pump comprises pumping the slurry into a mud-water separation facility; recycling water separated by a mud-water separation facility; the separated silt is used for backfilling and filling the low-density area on the U-shaped well edge, and the backfilling and filling process comprises the steps of lasting for 24 hours, so that the negative influence on the surrounding land is minimum;

The volume of the U-shaped well 15 is about 73 liters based on the center distance of the two vertical sections 16 of the U-shaped well 15 of 2 meters, the outer diameter of the well pipe of 30mm, the wall thickness of 1.2mm and the total length of the well pipe of 50 meters in the well depth of 103 meters;

the dam 14 has the beneficial effects of collecting the up-flowing silt fluid, isolating the silt from the ground soil, and preventing slow pit collapse. The dam and pit may sometimes be omitted.

Working procedure of example 1: the gravity head 1 is connected across the well pipe 6. The control system host starts the winch 2, the operation pipeline module 3, the well pipe box and the water supply source, the water is output from each outlet hole 11 on the drag reducing surface of the gravity head, as shown by two groups of outward arrows in the figure, the water is used for slurrying soil 17 on the drag reducing surface, the boundary 18 of the soil is eroded by the water to collapse and continuously retreats, and a fluid thin layer 19 is formed between the soil boundary and the drag reducing surface; the thin layer of fluid reduces the resistance of the earth to the sinking of the gravity head. The thin fluid material partially forming the thin fluid layer is upwards flushed to the ground and enters the dam of the ground. In the process of upwelling of the fluid thin material, sediment precipitation, water diffusion and scouring of surrounding soil are accompanied. Determining the state and distribution of each outlet hole on the gravity head through a test, so that the fluid thin layers are still distributed reasonably or connected into sheets when the gravity head moves in soil;

The gravity head is internally inserted into the soil from the dam cylinder 14, and the gravity is utilized to draw the well pipe to sink and finally form a U-shaped well 15 penetrating into the soil; the U-shaped well consists of two vertical sections 16 and a semicircular section 9;

the gravity head pulls the U-shaped well to a specified depth, the outlet hole is closed or reduced to output, and the winch pulls the gravity head to return; then cut Ji Jingguan and closed with plug 20 and the well is completed.

In one possible design, the gravity head takes on other shapes.

In one possible design, the gravity head includes a battery, an ultrasonic detection device, and a communication facility; the ultrasonic detection device provides the effects that the underground real-time monitoring comprises the investigation of the route of the next well and the state of the well being drilled is known according to the reference object, so that the site can be intuitively realized. Ultrasonic detection and communication facilities may also be omitted for the area of the well being surveyed.

In the embodiment 1, a U-shaped well is formed by adopting a gravity head and fluid drag reduction technology, the pressure resistance, shearing resistance and resistance of a generated fluid thin layer relative to soil are weakened, the bearing capacity to stones is weakened, and the fluidity is enhanced; the thin layer of fluid greatly reduces the resistance of gravity heads, well pipes and work lines to travel in the earth 17. The U-shaped well drilling machine with the drag reduction surface not only solves the technical problem of building a large-span low-impedance-cold energy export and import impedance-U-shaped well soil source heat storage system which is not solved by the long-term want of the technicians in the field, but also has the effects of small space size, low power consumption, high automation degree, environmental friendliness, simple structure, reliable performance, high well drilling efficiency, low well drilling cost and good adaptability to soil and site conditions; the distance between the two vertical sections of the U-shaped well can easily reach more than 3 meters, and the freedom of designing the thermal resistance between the two vertical sections of the U-shaped well is realized.

In one possible design, example 1 and includes an irrigation facility; the water filling facility fills water in the well pipe, so that the problem that the hollow pipe is not easy to sink due to the fact that the buoyancy is generated due to the small density is solved.

In one possible design, the U-shaped well logging machine is mounted on an engineering truck 21; a frame 22 is provided on the working vehicle 21, and the hoist 2 is provided on the frame. And engineering vehicles are adopted as relevant facilities for platform integration, so that the maneuverability is good.

In one possible design, the working line 7 comprises a slurry return pipe 23, the drag reducing surface on the gravity head comprises a plurality of inlet holes 24 and a slurry return pipe network 25 connecting the inlet holes 24 and the slurry return pipe 23; the slurried soil, namely, the fluid thin material, which partially forms the fluid thin layer 10 and is sucked by each inlet hole 24, sequentially returns to the ground through the inlet holes 24, the slurry return pipe network 25 and the slurry return pipe 24;

adopting a slurry returning pipe, a slurry returning pipe network and arranging a hole on the drag reduction surface, wherein the suction of the hole enables the water to be smoother and the slurry to be faster; the device has the advantages of providing a stable ascending channel for most of the fluid thin materials returning to the ground, relieving the pressure on site, saving the energy of the fluid source, avoiding the harm of the fluid thin materials to the peripheral soil scouring, and the like. The slurry return pipe 23 is responsible for retraction as part of the service line by the service line module.

In one possible design, the outlet and/or inlet is partitioned, including into left and right portions, or left front, left rear, right front and right rear portions; and an outlet partition valve and an inlet partition valve are arranged to control the fluid output and suction of each partition. The zoning control is helpful for controlling the system host to perform the gravity head, including the control during the return process.

In one possible design, a set of two guide rails are used, and guide rail matching interfaces are arranged on the left side and the right side of the gravity head; the guide rail is connected with the guide rail in a matched mode through a matched interface, and the gravity head is restrained from cutting into the ground. Thus, the gravity head can cut into the ground smoothly and accurately at the beginning.

The pressure of the site of the gravity head of the well drilling is examined, and the site pressure is 1.56MPa, the water head pressure in a water supply pipe reaching the site is 0.6MPa, and the water head pressure of a slurry returning pipe filled with the fluid thin material at the site is 0.96MPa according to the density of the soil at the site of 2.6, the density of the water of 1, the density of the fluid thin layer of 1.5 and the distance from the ground of 60 meters at the site. Therefore, in order to make the gravity head discharge water from the outlet hole, the water supply pipe needs to be pressurized on the ground so that the pressure on site is more than 1.56MPa. This pressure is sufficient to drive the fluid sheet in the slurry return pipe upward.

Theoretically, as the fluid thin material is upwelled up under the pressure of the outlet water from the beginning, and the upwelling phenomenon always exists, the U-shaped well can be drilled by the fluid drag reduction technology without arranging a special sediment upwelling channel; but the sediment upward flow channel formed by upward flow is unstable, and the upward flow sediment can also cause scouring to peripheral soil to bring the risk of peripheral soil collapse. This can be solved by introducing a slurry return pipe and a dam.

Because the soil has shearing resistance, the analysis content of the pressure on the site of the gravity head for well drilling is possibly inconsistent with microcosmic reality, and at the moment, the constant flow control is output by adopting a water supply pipe, namely the on-site soil sizing is insensitive to the on-site pressure change, so that the effective use of the fluid drag reduction technology can be ensured.

The invention further provides a gravity head of the U-shaped well drilling machine.

This object of the invention is achieved by the embodiment shown in fig. 1 and 2;

example 2 a gravity head was made for use in making a U-well device for use in pulling down a well pipe to exchange heat with the soil. The gravity head 1 comprises a drag reducing surface 10 and a water supply network 12; the drag reducing surface 10 comprises a plurality of exit holes 11; the outlet hole 11 is sequentially communicated with a water supply network, a valve, a water supply pipe 8 and a water supply source; the water supply source comprises a pressurized water source or air source;

The water is discharged from each outlet hole, the water is discharged to enable the soil on the drag reduction surface to be slurried, the boundary of the soil is washed and dispersed by the water to continuously retreat, and the water is discharged to form a fluid thin layer 19 on the drag reduction surface; the thin layer of fluid 19 reduces the resistance of the gravity head 1 to travel in the earth 17; the gravity head 1 comprises a connecting interface with the well pipe semicircular section 9, comprises the inner wall of a jacket with an inverted U-shaped cross section, realizes transmission connection with the well pipe 6 semicircular section 9 through the connecting interface, and pulls the well pipe 6 to sink;

the U-shaped well drilling machine of the embodiment 2 can be used for drilling a U-shaped well without drilling, and can be used for manufacturing an efficient soil source heat and cold storage system. Solves the technical problems which are long-term to be solved by the technicians in the field and cannot be solved.

In one possible design, the water supply source outputs high pressure gas, which loosens the drag reducing surface soil; the soil boundary is washed out by the air to collapse and continuously retreats, and a fluid thin layer is formed between the soil boundary and the drag reduction surface; the fluid thin layer reduces the resistance of soil to the sinking of the gravity head; the exit gas diffuses to the environment; the gravity head comprises a connecting interface with the well pipe semicircular section; and the transmission connection with the semicircular section of the well pipe is realized through the connection interface, and the well pipe is pulled to sink, and finally a U-shaped well penetrating into soil is formed.

In one possible design, where the water supply is water, the gravity head 1 may also include a slurry return pipe network 25, with the drag reducing surface 10 also including a plurality of inlet holes 24; the inlet 24 is communicated with the interior of a slurry returning pipe 23 of the well drilling machine or a push rod of the pressure boosting U-shaped well drilling machine through a slurry returning pipe network 25. Thus, the damage to the peripheral soil scouring caused by the upward surge of the fluid thin material can be avoided.

In one possible design, the gravity head includes a set of two fins 26; the fins 26 are connected with the gravity head by a one-dimensional revolute pair mechanism and are in transmission connection with respective driving mechanisms; the state of the gravity head in the sediment is changed according to the change of the state of the fin. The two fins are combined with the ultrasonic detection device, so that the state of the gravity head on site can be effectively detected and controlled, and the gravity head can be corrected in time if torsion and deviation occur in the sinking and rising processes;

in one possible design, to protect the well tubular semicircular section 9 from scratches by the stone 27, a semicircular section protector 28 is used below the semicircular section 9. Many possible forms of semicircular segment guard 28; comprises a surface which is matched with the semicircle section and two connecting interfaces which are in sliding fit with the inner side surface of the gravity head by adopting vertical caulking grooves and grooves; the semicircular segment protection piece at least covers a semicircular segment with the length of 80%; the semicircle segment is made of steel plates; the semicircular segment protector of example 2, in which the caulking groove and the groove are in sliding fit with minimal insertion and extraction force, comprises that only a force of 1 kg of the semicircular segment of the well pipe is needed to push the semicircular segment of the well pipe, can be pushed down from the gravity head and be thrown out on site, and comprises that the semicircular segment is still connected with the semicircular segment.

In one possible design, the service line of embodiment 1 or 2 includes a cable with which to transmit electrical power and/or electrical signals to the field.

In one possible design, a mesh enclosure is disposed outside each of the outlet and inlet openings; preventing blockage.

In one possible design, the system further comprises a generator, wherein the generator utilizes the hydraulic motor to generate electricity to supply on-site power; the hydraulic motor includes a hydraulic spent liquor used as an output fluid for slurrying soil using pressurized water from a water supply line as a driving source.

In one possible design, the well drilling machine comprises a group of two guide rails, and a group of two guide rail matching interfaces are arranged on the outer sides of the left side and the right side of the gravity head where the two vertical sections of the U-shaped well pipe are arranged; the guide rail is connected with the guide rail in a matching way, and the gravity head is restrained from cutting into the ground and not sloshing. Thus, the gravity head can cut into the ground more smoothly and accurately.

FIGS. 1 and 2 and give example 3;

example 3, a multiple plate drag reducing surface was fabricated, including the drag reducing surface used to fabricate the gravity head; which comprises a first 29, a second 30 and a third 31 doubler. The second composite plate is stamped with a plurality of channels 32, the first composite plate and the third composite plate sandwiching the second composite plate. The three compound plates 29, 30 and 31 comprise a multilayer sheet-metal structure with several fluid channels 34 formed by rivets 33;

The surface of the drag reducing surface of the replica board comprises a plurality of through-hole bushings 35, and the through-hole bushings 35 are used for mounting suction nozzles and nozzles 36. The partial through holes are respectively used as outlet holes or inlet holes for forming a fluid thin layer according to the requirement; and fluid passages communicating with the outlet or inlet holes are used as the water supply pipe network 12 and the slurry return pipe network 25, respectively. And a jumper 37 is provided for communication across a portion of the fluid path. The thickness of the three compound plates 29, 30 and 31 comprises 0.3 to 5.0 mm. Too thin strength is low and not wear-resistant; too thick can cause the gravity head to weigh too much. The through-hole sleeve 35 can also be used directly as an inlet without installing a nozzle; in example 4 the nozzle was mounted with a retracted position.

The beneficial effects of embodiment 3 are: only three doublers 29, 30 and 31 are required to create a drag reducing surface comprising tens of individual channels of consistent properties and hundreds to thousands of through holes. The channels on the second manifold plate can be compression molded at one time and can freely provide a plurality of complex fluid passages without increasing the number of parts. The drag reducing surfaces produced using the three composite plates 29, 30 and 31 are rigid and suitable for forming various curved surfaces.

In one possible design, the through-hole sleeve 35 and includes a connection interface for mounting the mesh enclosure; the net cover can prevent sundries from entering.

In one possible design, two doublers 29 and 30 or 30 and 31 are used to create a drag reducing surface; through holes are arranged on the two compound plates 29 and 30 or 30 and 31 for constructing holes and inlet holes;

the through hole sleeve is suitable for being connected with different nozzles, and the nozzles can provide different water flow states including directional water outlet, so that the design freedom of the fluid thin layer is facilitated; the manner in which the nozzle of example 4 is retracted into the interior has the effects of both wear resistance and smooth drag reducing surface, and has the effect of being able to function in a variety of jet conditions for the nozzle design. The nozzle and the suction nozzle are provided with the net cover, so that sundries can be prevented from entering.

The invention adopts a pipeline connection mode of the same stroke and the same resistance between a water supply pipe and an outlet hole and between an inlet hole and a slurry return pipe, wherein the water supply pipe and the slurry return pipe in the multilayer sheet metal structure body. The same-pass same-resistance connection mode refers to: the lengths of the pipelines from all the inlet holes or all the inlet holes of one partition to the water supply pipe are the same, and the flow passage resistances of the pipelines are the same. The pipeline connection mode with the same stroke and the same resistance is insensitive to various disturbances including the water pressure change applied between the water supply pipe and the inlet hole, and the output consistency of each outlet hole is good. The outlet hole of the gravity head is partitioned, and each zone is controlled by a control valve, so that the gravity head is not inconsistent with the same stroke.

In one possible design, the drag reducing surface of example 3 includes being manufactured by welding.

In one possible design, the first doubler in example 3 is another object such as a pipe wall or a plate.

In one possible design, the spall reducing surface of example 3 also includes one or more demagnetizing devices 38. The demagnetizing device 38 includes an ac electromagnetic coil; the alternating electromagnetic field of the alternating electromagnetic coil is utilized to demagnetize the soil around the gravity head, so that the magnetic attraction force of the ferromagnetic body and the paramagnetic body in the soil stone is eliminated, the soil stone outside the slurry returning pipe network smoothly flows without hardening, the sediment in the slurry returning pipe network flows more smoothly, and the well digging resistance is reduced.

In one possible design, several electromagnetic vibrators using the same ac power source are used, and the vibration from the electromagnetic vibrators is used to reduce the running resistance.

Fig. 3 and 4 show example 4;

example 4, manufacturing a gravity head 1 with one side pushing out of a semicircular section of well pipe, including use in manufacturing a well drilling machine; the anti-drag surface comprises an anti-drag surface 10, a well pipe semicircular section caulking groove 39, a plurality of elastic plates 40, a plurality of movable fences 41 and electric fence jacks 42, wherein the anti-drag surface 10 is arranged on the surface of the well pipe semicircular section caulking groove or is integrally manufactured with the surface of the well pipe semicircular section caulking groove, and the movable fences 41 and the electric fence jacks 42 are arranged at the end faces of the semicircular section caulking groove 39. Drag reducing surface 10 includes a plurality of exit orifices for forming a thin layer 19 of fluid;

The semicircular section embedding groove 39 is internally provided with the semicircular section 9; the elastic plate 40 is arranged along one side of the bottom edge of the semicircular segment caulking groove 39 and occupies at least the semicircular segment caulking groove position; the elastic plate is an arched plate and comprises a thickness of 0.5-2 mm, a width of 20 mm and a length of 40-80 mm; the middle is connected with the gravity head by a riveting piece. Initially, the movable fence 41 flattens the elastic plate 40 through the semicircular section 9;

the bottom end of the movable fence 41 is connected with the gravity head 1 by a one-dimensional revolute pair mechanism, and the movable fence has two stable states: 1) A locking state that the movable fence is inserted into the electric fence jack and 2) an opening state that the movable fence is separated from the electric fence jack. Each movable fence 41 in the locked state is inserted into the electric fence insertion hole 42 to restrict the locked well pipe semicircular section 9 as shown in fig. 3 a;

example 4 principle of operation: the gravity head 1 pulls the well pipe to sink to a specified position, the control system host stops the gravity head from sinking, the outlet holes are closed, the electric fence jack 42 moves upwards to enable the movable fence to deviate out and turn over 180 degrees as shown in 3 b; when the movable fence is released, the resilient plate resumes its arcuate shape, as shown by the dotted arc in fig. 4, and ejects the semicircular segment 9 out of the semicircular segment caulking groove 39. Then the winch pulls up the gravity head to return to the ground; the beneficial effects of embodiment 4 include: because the semicircular section of the well pipe does not run from below, the situation that the inner wall of the inverted U-shaped jacket of the gravity head clamps the stone to prevent the semicircular section from separating from the gravity head and the front of the earth stone to grind and scrape the semicircular section does not exist; the bottom end of the gravity head can be designed to be shuttle-shaped from the side, and the two ends are more easy to wedge into soil and insensitive to stones;

The gravity head of example 4 was able to reduce the average thickness to 39 mm by collapsing the semicircular section of the well casing to 1-2 mm in the case of an outer diameter of the well casing 30 mm. Because of being thinner, well digging is smoother.

FIG. 3 and example 5 are given;

example 5 a gravity head 1 was manufactured, including for making a well drilling machine; it comprises a drag reducing surface 10 provided on or integrally formed with its surface and a plurality of sets of two counter-rotating augers 43 provided at the bottom of the gravity head, each set. Drag reducing surface 10 includes a plurality of exit orifices for forming a thin layer 19 of fluid;

the screw propeller increases the downward well-digging force of the gravity head and is insensitive to stones in the soil. The torque reaction forces of the counter-rotating propellers 43 of each set to the gravity head exactly cancel each other out.

FIG. 5 shows example 6;

example 6 a well casing was manufactured comprising two well casing discs 44 and two well casing aligners 45; at least half of the U-well length of tubing 46 is coiled around both well tubular disks; the pipe 46 passes through the well straightener 45. The well straightener 45 comprises a correction wheel arranged on both sides of the pipe. Content with Guan Guanzi correction can be referred to in the prior art;

the beneficial effects of embodiment 5 are: the modularized well casing is convenient for on-site taking; well pipe aligners are used to straighten well pipe just lowered from a well pipe tray or compensate for bending to eliminate its potential for bending. The well pipe straightener is selected.

In one possible design, example 6 incorporates a half-circle segment guard 28. The semicircular segment protector 28 is different from that in embodiment 2, and comprises an arc-shaped tubular object which is wrapped outside the semicircular segment; the gravity head is in transmission connection with the well pipe through the semicircular section guard piece 28; the semicircular segment protector is made of steel plates and thermoplastic materials. The semicircular section protecting piece can prevent the well pipe semicircular section from being scratched and collapsed. The arc tube semicircle protector 28 provides more complete protection to the semicircle and remains underground after well construction is completed.

FIG. 6 shows example 7;

example 7, exit holes 11 and entry holes 24 were provided in the form of exit hole rows 47 and entry hole rows 48 on drag reducing interface 10.

The arrangement structure of the embodiment 7 is simple, and the water supply network management and the ore sand pipe network are easy to design and process; the lengths of the multiple pipelines from the middle thick arrow through the outlet holes 11 of the outlet hole row 47 and the inlet holes 24 of the inlet hole row 48 to the lower thick arrow are the same. The flow passage resistance characteristics of the pipelines are the same, so that the same-path and same-resistance connection mode is realized;

the beneficial effects of the same-pass same-resistance connection include: the entire waterway is insensitive to various disturbances including changes in the water pressure applied between the row of outlet holes 47 and the row of inlet holes 48, and has good consistency in the output or input of the inlet holes 24 and the outlet holes 11.

FIG. 7 shows example 8;

example 8 referring to examples 1 and 2, a U-shaped well logging tool was manufactured comprising a gravity head 1, a frame 22, a hoist 2, a work line module 3, a well casing 4, a press boosting device, a water supply source and a control system. The U-shaped well drilling machine comprises a U-shaped well drilling machine which is arranged on an engineering truck 21. The water supply source comprises a pressurized water source or air source; the water supply source defaults to a pressurized water source;

the winch 2 is in transmission connection with the gravity head 1 through a sling and can pull up the gravity head at any time to return; the gravity head is in transmission connection with the semicircular section of the well pipe 6; a part of gravity of the gravity head is transmitted to the ground through the well pipe; the gravity head can be separated from the semicircular section at any time;

the operation pipeline module receives and releases an operation pipeline; the working pipeline comprises a water supply pipe and a cable; the water supply pipe comprises supplying water and energy for producing fluid slurry to form a fluid thin layer on site; the well pipe box stores a well pipe 6; the well pipe comprises a semicircular section 9;

the surface of part or all of the gravity head, which is rubbed with the soil, is set as a drag reduction surface; the drag reduction surface comprises a plurality of outlet holes; the outlet is sequentially communicated with a water supply network, a valve, a water supply pipe and a water supply source; the gravity head comprises a water supply network; the water supply network is communicated with the outlet and the water supply pipe;

the press boosting device comprises a group of two push rods 49, an increasing and decreasing manipulator 50 and two presses 51;

the push rod comprises a plurality of push rod pieces 52 which are crossed up and down and are continuously connected through a connecting interface; the push rod piece 55 comprises a 180-degree arc-shaped half pipe with two wing edges 53; the connecting interface comprises connecting holes arranged on two wing edges; the connecting holes are used for connecting fasteners; the position of the connecting hole centre line is indicated in fig. 11b by a number of dash-dot lines 54;

the press 51 includes a lifting platen 55;

the push rod is in transmission connection with the lifting pressing plate 55 and the gravity head, transmits the force of the lifting pressing plate to the gravity head, and can be pulled up by the lifting pressing plate; the push rod 49 comprises a well pipe 6, a working pipeline 7 and a sling 5;

the add/drop robot 50 carries the loading/unloading pusher member 52 and secures the pusher member to the existing pusher 49 with a fastener for continuously increasing the pusher length, or loosens and removes the fastener of the uppermost one of the existing pusher 49 from the existing pusher for continuously decreasing the pusher 49 length.

When a well is dug, a control system host starts a winch 2, an operation pipeline module 3, a well casing 4, a fluid source and two presses 51 to enable a discharge hole 11 to output water, the discharged water enables soil on the drag reduction surface to be slurried, a soil boundary 18 is scoured, dispersed and continuously retreated, and a fluid thin layer 19 is formed between the soil boundary 18 and the drag reduction surface; the fluid thin layer reduces the resistance of soil to the sinking of the gravity head; the slurried soil which partially forms the fluid thin layer, namely the fluid thin material, is upwards gushed to the ground from the inside of the push rod; a dam 14 reaching the ground;

Simultaneously, the two presses are switched to a pressing operation mode of pressing the gravity head: the lifting pressing plate synchronously descends to lower two push rods, the gravity head 1 is pressed down for one section through the push rods, and then the lifting pressing plate ascends to leave an operation space for adding one push rod piece for the increasing and decreasing manipulator; adding a section of push rod piece for each of two push rods to increase and decrease the mechanical arm; the lifting pressing plate descends synchronously again to press down the two push rods and the gravity head for one section; the continuous sinking of the gravity head is repeatedly realized in this way; when the weight of the push rod is larger than the friction force between the gravity head and soil 17, the sling pulls the gravity head to orderly descend;

the gravity head comprises a U-shaped well which is formed by utilizing the gravity of the gravity head and the thrust of a press to draw the well pipe to sink and finally penetrate into soil; the U-shaped well consists of two vertical sections 16 and a semicircular section 9;

after the gravity head pulls the U-shaped well to a specified depth, closing or reducing the output of the outlet hole, and switching the press boosting device to a lifting operation mode of pulling up the gravity head: the lifting pressing plate is in transmission connection with the push rods and synchronously ascends to pull the two push rods to a section; then the lifting pressing plate is separated from the push rod and is in transmission connection with the push rod, and the lifting pressing plate ascends to leave an operation space for disassembling a push rod piece 52 for the increasing and decreasing manipulator 50; the number of the mechanical arms is increased or decreased, and one section of push rod piece of each of the two push rods is reduced; the lifting pressing plate is connected with the push rods again in a transmission way and rises synchronously to pull up the two push rods for one section, so that the continuous rising of the gravity head is repeatedly realized, and meanwhile, the winch is matched with the gravity head to pull up.

Or when the press is in a lifting operation mode of lifting the gravity head, the gravity head is directly lifted by using the winch, and the gravity head is separated from the semicircular section and returns; then, the gravity head returns, and the manipulator is increased or decreased to detach the pushing rod piece.

The U-shaped well drilling machine with the press boosting device has the beneficial effects that the pressure on the gravity head can be increased by utilizing the pressure lever device on the ground, which is important for drilling wells in certain areas with stones which need extra pressure; the pushing rod piece can be continuously lengthened according to the requirement; a push rod consisting of push rod pieces, wherein the inside of the push rod can be provided with a well pipe and a water supply pipe and is used as a special channel for mud backflow; the increase and decrease of the manipulator can save manpower.

In one possible design, the pushrod includes a number of apertures; fluid sheet flows in and out through the void.

In one possible design, a standard rod segment with threaded ends is used.

In one possible design, the drag reducing surface on the gravity head further comprises a plurality of inlet holes and a slurry return pipe network connecting the inlet holes and the inside of the two push rods. The on-site part of the aqueous fluid thin material sequentially returns to the ground through the inlet hole, the slurry returning pipe network and the inside of the push rod. Thus, a special ground return channel for the fluid thin material is established, which is beneficial to optimizing the working condition of the site and reducing unnecessary scouring of the fluid thin material to the soil.

FIGS. 9 to 14 show example 9;

embodiment 9, a well construction and heat insulation sleeve sleeving integrated machine is manufactured, which comprises a gravity head 1, a winch, an increasing and decreasing manipulator 50, a second increasing and decreasing manipulator 56, a working pipeline module, two sleeve protective pipes 57, a water supply source and a control system; for drilling a second U-well 58 at the existing U-well 15 which has been driven into the ground and for simultaneously sleeving a heat insulating sleeve 59 over the vertical section 16 of the existing U-well;

the insulating sleeve is made up of a number of insulating sleeve segments 60; the insulated casing section 60 comprises an inner diameter of 40-70 mm, a wall thickness of 60-100 mm, and a length of 2-4 m; the surface of the insulated casing section 60 includes a reinforcing layer with a water barrier layer and 10-20 millimeters; the water-resisting layer comprises geotextile; the reinforcing layer comprises steel wire concrete; hook climbing members 61 are respectively arranged at the two ends of the heat insulation sleeve section; the outer surface of the insulating sleeve comprises an annular groove 62; the opening width of the annular groove is 10-30 mm, and the depth is 5-50 mm; the annular groove increases the binding force with sediment; a tray 63 is arranged at the bottom end of the heat insulation sleeve to hold the heat insulation sleeve;

the tray 63 is a disk with a plug connector 64 provided thereon, and the lowest insulated casing section is connected to the tray 63 by the plug connector 64; the center of the tray is provided with a through hole and a sealing piece 65; a vertical section 16 in the seal passing through the U-well; a circle of nozzles 36 are arranged on the periphery of the tray; the two trays 63 are connected by a tray link 66; the tray connecting rod is in transmission connection with a steel wire rope winding and unwinding disc 68 on the gravity head 1 through more than two steel wire ropes 67; the gravity head 1 is connected with the water path of the tray to supply water to the tray; the downwardly facing side of the tray 63 is provided with a drag reducing surface 10 for creating a thin layer of fluid drag reduction and soil pick up;

A sleeve protecting pipe 57 is adopted at the outer side of the heat insulation sleeve, and the sleeve protecting pipe 57 is formed by connecting a plurality of protecting pipe barrel sections 69 in series; the shield tube section 69 comprises an inner diameter 10-60 mm greater than the outer diameter of the insulating sleeve, a wall thickness 10-20 mm, and is equal in length to the insulating sleeve section; threaded connection interfaces 70 for threaded connection are respectively arranged at two ends of the protective tube barrel section 69;

the sleeve protection tube is connected with the gravity head 1 through a connecting piece 71 and is in zero plug connection with the tray 63, namely, the plug connection with the plug force close to zero; when the gravity head 1 is pulled up, the sleeve protecting tube 57 is separated from the tray and returns to the ground together with the gravity head;

the operation pipeline module receives and releases an operation pipeline; the service line includes a water supply line and a cable.

It is necessary to explain that: when the density of the heat-insulating sleeve is less than 1, the counterweight is needed to not float in the slurry, the sleeve protection tube plays a role in weight increment, the sleeve protection tube and the tray have good tightness, and the container 72 formed by the sleeve protection tube and the tray can be kept isolated from the outside; the average density of the vessel is changed by adding silt to the vessel 72 to cause it to sink rapidly;

the length of the insulating sleeve and the second U-shaped well is only 20-40% of the length of the existing U-shaped well 15, and the insulating sleeve and the second U-shaped well are relatively easy to manufacture.

Example 9 principle of operation: including the second U-well and the sleeve immediately after the U-well 15 is completed. Inserting a positioning pipe 73 into the existing U-shaped well vertical section 16 and fixing the positioning pipe, wherein the positioning rod keeps the vertical section 16 straightened; the positioning pipe comprises a steel pipe with the wall thickness of 1 millimeter and the length of 4 meters; then a section of insulated casing section 60 is moved by the adding and subtracting manipulator 50 to be sleeved outside the vertical section 16 of the U-shaped well and connected with a tray 63 below; from the second time on with the underlying existing insulation sleeve; the second increasing and decreasing manipulator 56 is climbed on the hook climbing piece 61 outside the two ends of the two adjacent sections of heat insulation sleeves by using the telescopic belts 74;

then, the increasing and decreasing manipulator 50 carries a section of protective tube barrel to be sleeved outside the heat insulation sleeve and is connected with the tray below in a plug-in manner; from the second time, the sleeve is in threaded fit connection with the existing sleeve protection pipe below; the method specifically comprises the following steps: increasing or decreasing the manipulator 50 to rotate the shield barrel section into position; the second add/drop manipulator locks the shield tube segment with fasteners through fastener holes 75 in the shield tube segment; a heat insulation sleeve is required to be sleeved on the two vertical sections;

in synchronization with this, the gravity head cuts into the ground to strike a second U-well 58, causing the nozzles at the periphery of the chassis to spray water upward, which water is upwelled because of less density than the surrounding soil, thereby creating an upwelling mud layer 76 on the casing surface; the upper slurry layer 76 reduces the resistance of the casing tube to subsidence;

Thus, the insulating sleeve section and the protective sleeve section are sleeved while drilling a well; until reaching the position of the appointed depth of the underground, closing down the gravity head to discharge water; pressing the heat insulation sleeve from above by a section of annular pressing block to prevent the heat insulation sleeve section from being lifted when the protective sleeve section is pulled up; the weight of the annular pressing block is 10-60 kg; then, the sleeve protecting pipe section is removed from the upper surface by using an increasing and decreasing manipulator and a second increasing and decreasing manipulator, and the gravity head 1 is pulled up by a winch through the sling 5 to return and synchronously loosen the steel wire rope winding and unwinding disc 67 so as to leave the tray and the tray connecting rod in place; the sleeve protecting section rises along with the gravity head to return to the ground and is fully recovered; fixedly connecting the steel wire rope with the fixed pile; the sediment hardening compaction is carried out until the periphery of the heat insulation sleeve is reached, and the annular pressing block is removed; the second U-well setup and insulating sleeve set up is completed.

Advantageous effects of example 9; when the soil source cold and heat storage system is built, a heat insulation layer is not required to be arranged on the soil source cold and heat storage system, a layer of second U-shaped well soil cold and heat storage system with thinner thickness is arranged on the upper part of the existing U-shaped well soil source cold and heat storage system, and the temperature difference between the second U-shaped well soil cold and heat storage system and the boundary of the soil cold and heat storage system is reduced by using the second U-shaped well soil cold and heat storage system first, so that the heat loss passing through the boundary is reduced; the cost of the soil cold and heat storage system with the second U-shaped well is far lower than that of the soil cold and heat storage system with a layer of heat insulation material;

Example 9 provides a technical means for storing heat energy above 60 ℃ across seasons, including 60 ℃ heat energy of greenhouse underground reservoirs in north China, by using soil; the annular groove 62 is arranged on the outer surface of the heat insulation sleeve, and the binding force between the heat insulation sleeve and the sediment is stronger after the sediment on the periphery of the heat insulation sleeve is hardened and compacted; the use of a casing guard protects the insulating casing from friction with the earth and also helps to build up a layer of upwelling mud 76 around the casing guard surface outside the casing guard.

In one possible design, an electrodynamic vibrating bar is provided below the lowermost insulated casing section. In so doing, the downward static friction of the well drilling machine is changed into dynamic friction.

In one possible design, drag reducing surfaces 10 are provided on the surface of the cartridge section; in this way, a more reliable fluid layer can be obtained for reducing the travel resistance of the shield tube section in the earth.

In one possible design, two sleeve guards are provided on either side of the gravity head 1 but not connected to the gravity head; thus involving less of each other.

In one possible design, the gravity head is added with a nozzle for spraying water to the heat insulation sleeve; the trays and tray links of example 9 were not used and a insulating sleeve holding mechanism was used to prevent the insulating sleeve from falling down, leaving the density of the insulating sleeve slightly less than 1. The installation of sleeving the heat insulation sleeve is simpler.

FIG. 15 shows example 11;

example 11 a thermal insulation panel floor insert was manufactured for providing a vertical insulation layer in the soil. As the vertical dimension of the whole heat insulation layer can reach 20 meters; a plate heat insulating block plate 77 which is divided into a plate having a height of 3 m in the vertical direction, a width of 3 m and a thickness of 0.1 m for construction; the density of the heat insulation block board is required to be 1+/-0.3, so that the buoyancy and sinking force of the heat insulation block board in soil are not very large; the heat insulating block boards are used to form various heat insulating layers underground. The heat-insulating plate comprises a rock wool plate core which is formed by sealing and wrapping a piece of polyurethane foam by adopting a plastic film; a reinforcing rib net is arranged in the heat insulation plate so as to increase the strength; the surface of the heat insulation block plate comprises a reinforcing layer with 10-20 mm; the water-resisting layer comprises geotextile; the reinforcing layer comprises steel wire concrete;

the insulation board ground inserting device comprises a group of two gravity heads 1, a winch, an increasing and decreasing manipulator 50, a second increasing and decreasing manipulator, an operation pipeline module, a water supply source and a control system;

the winch is in transmission connection with the gravity head 1 through a sling 5 and can pull up the gravity head at any time to return; the operation pipeline module receives and releases an operation pipeline; the working pipeline comprises a water supply pipe 8 and a slurry return pipe 23;

similar to the structure of the insulation sleeve and the connection thereof of embodiment 9, the circumferences of the insulation plates near the upper and lower ends are respectively provided with hook climbing members 61; the telescopic belts are connected to hook climbing pieces at the outer sides of two ends of two adjacent heat insulation plates by using a second increasing and decreasing manipulator, so that the heat insulation plates are connected; the outer surface of the heat insulation plate comprises a plurality of grooves; the width of the opening of the groove is 10-30 mm, and the depth is 5-50 mm; the grooves increase the binding force with sediment;

The two gravity heads 1 are symmetrically arranged on two sides of the heat insulation plate, and the bottom edges of the gravity heads are provided with an outlet hole 11 and an inlet hole 24 for constructing a fluid thin layer to reduce drag and absorb soil. A supporting plate 78 is connected to the bottom edge of the heat insulation plate, and the gravity head is inserted into the supporting plate in a zero-insertion way through an insertion connector 64 and is pressed on the supporting plate to pull the heat insulation plate to sink through a pressing plate; the gravity head is directly separated from the supporting plate when ascending.

Example 11 principle of operation: the hoist puts down the gravity head 1 to press on the supporting plate 78 to pull the heat insulation plate to sink, and the outlet hole 11 below the gravity head outputs water and the inlet hole 24 absorbs the water; the effluent is deflected to the middle of the heat insulation plate block as shown by two oblique arrows in FIG. 16; the water slurry is formed under the supporting plate 78, the soil boundary 18 is washed and dispersed by the water to continuously retreat, and a fluid thin layer 19 is formed between the soil boundary and the supporting plate; the thin layer of fluid 19 upwells because it has a lower density than the surrounding soil 17 to create an upwelling slurry layer on the surface of the insulation panels; the upper slurry layer 77 reduces the resistance of the casing tube to sinking; and sucking the soil below the transfer supporting plate to enable the gravity head to pull the heat insulation plate to sink. With the sinking of the heat-insulating plate, a heat-insulating plate is moved by the increasing and decreasing manipulator 50 and is connected with the sinking heat-insulating plate; repeating the steps until the gravity head reaches a specified position, and pulling up the gravity head 1 by the winch 2 to return to the ground;

And then pressing the heat-insulating plate by using a pressing block, and removing the pressing block after the soil is hardened and compacted, thus finishing the construction.

The beneficial effects are that: embodiment 11 provides a technical means for arranging a vertical heat insulation layer for a soil source cold and heat storage system; vertical plate-like objects and prevent the underground water on two sides from flowing through.

In one possible design, steel wire ropes are used to tie the insulation panels. Thus, the heat insulation plate is not easy to wander.

In one possible design, the grooves are replaced by grooves of the same width; the height of the convex groove is 5-10 mm.

The invention aims at providing a U-shaped well soil cold and heat storage system.

This object of the invention is achieved by the embodiment 12 given in fig. 16, 17.

Example 12 according to the above method of the present invention, a soil heat and cold storage system is constructed, comprising more than one U-shaped well 15; the U-well 15 comprises two vertical sections 16 and one semicircular section 9. The distance between the two vertical sections 16 ranges from 0.5 to 3 meters; more than 95% of the U-shaped well extends into the soil 17. The U-shaped well 15 is filled with a heating medium; 103 meters of the U-shaped well pipe has a dead weight of about 16 kg and an internal space of about 55 liters; each of the U-wells 15 is connected by a parent pipe 79 to form a U-well system. Each dashed circle in the figure is a cross section of a constant diameter cylinder with the vertical section 16 as the axis; the U-shaped well system and soil where the U-shaped well system is located form a soil source storage cooling and heating system together. The soil source storage cooling and heating system adopts a heat insulation plate 77 as a heat insulation layer and an underground water barrier layer;

Generally, the overall seamless of the individual well tubes of the U-shaped well is required, and the length, inner diameter and fluid dynamics of the inner walls of the individual U-shaped wells comprising a U-shaped well array are equal; the U-shaped wells are oriented identically. The heat exchange efficiency can be improved by adopting the inner wall with turbulent flow characteristics for the fluid;

in embodiment 12, the connection between the main pipe 79 and the U-shaped well is a same-pass same-resistance connection, which ensures the parameters of each fluid circuit are consistent; the output between the terminals thereof is insensitive to pressure variations imposed on the fluid circuit.

The beneficial effects of embodiment 12 are: the U-shaped well drilling machine can build a U-shaped well array under the condition of not excavating soil, can keep the attribute, state and spatial position of soil at the periphery of the U-shaped well array to be 97% or more consistent with those before building, takes the central lines of two vertical sections 16 of the U-shaped well 15 and the connecting lines at the two ends of the central line as a plane, and takes the connecting lines of the two vertical sections as boundaries, wherein the state of the soil at the position, which is 0.4 meter away from the plane, of the soil is the same or basically the soil at the position, which is the same as the soil before drilling; i.e. the place close to the U-shaped well is not affected by the well drilling machine of the U-shaped well;

the U-shaped well drilling machine is environment-friendly, can drill wells in the existing structures and in a clearance window of 300 mm 25000 mm of underground pipelines, and does not need to fix PE-X pipes like integral soil digging and landfill, and comprises connecting two vertical sections of the U-shaped well by connecting pieces.

In one possible design, embodiment 12 attaches a rigid object semicircular segment guard 28 to semicircular segment 9. The semicircular section protecting piece is an arc-shaped tubular object and is wrapped outside the semicircular section; the gravity head is in transmission connection with the well pipe through the semicircular section guard piece; the semicircular segment protector is made of steel plates, thermoplastic materials and cement products. The mass of the rigid object semicircular segment protector with the total length of 3 meters is more than or equal to 5 kg. The semicircular segment protector 28 protects the semicircular segment.

The invention aims at providing a U-shaped well soil heat and cold storage system with a temperature measuring optical fiber device.

This object of the invention is achieved in that: according to the method, a U-shaped well soil cold and heat storage system is built, and the system comprises an optical fiber temperature measuring device, wherein the optical fiber temperature measuring device comprises a temperature measuring optical fiber and an optical fiber temperature measuring device host; the temperature measuring optical fiber is connected with at least one section of main pipe and/or one U-shaped well with low thermal resistance; or the optical fiber temperature measuring device comprises a temperature measuring optical fiber and an optical fiber temperature measuring device host; the temperature measuring optical fiber is connected with at least one part of cold and warm supply pipelines, cold and warm supply interfaces, floors, door and window frames, walls or ceilings with low thermal resistance, and is connected with at least one section of main pipe and/or one U-shaped well with low thermal resistance.

FIG. 18 shows example 13;

embodiment 13, manufacturing a U-shaped well soil source cold and heat storage heat pump cold and heat supply system with a temperature measuring optical fiber device, wherein the system comprises a U-shaped well system and an optical fiber temperature measuring device, and the optical fiber temperature measuring device comprises a temperature measuring optical fiber 80 connected with at least one section of main pipe and/or one U-shaped well in a low thermal resistance manner; the temperature measuring optical fiber 80 is connected with a heat exchange interface 82 inside the structure 81 in a low thermal resistance manner; the temperature measuring optical fiber 80 is optically connected with the optical fiber temperature measuring device host;

the U-shaped well soil heat storage system with the temperature measuring optical fiber device has the beneficial effects that: the method comprises the steps of rapidly measuring temperature information of thousands of points of the whole optical fiber, and realizing real-time monitoring of the U-shaped well system, the soil source heat accumulator and the cooling and heating system; the device can be used for optimizing the operation state of the cold-storage heat body, designing and building the cold-storage heat body, and measuring the artificial environment of a user and the working conditions of related equipment. For the relevant content of the optical fiber temperature measuring device, reference is made to the prior art.

In one possible design, embodiment 13 includes an optical fiber temperature measurement device including a temperature measurement optical fiber and an optical fiber temperature measurement device host; the temperature measuring optical fiber and the optical fiber temperature measuring device host are provided with universal quick-connection interfaces; the temperature measuring optical fiber and the optical fiber temperature measuring device host are connected through a universal quick-connection interface to form an optical fiber temperature measuring device;

By adopting the optical fiber temperature measuring device with the temperature measuring optical fiber hot plug interface, the comprehensive and precise temperature measurement of each household cooling and heating system can be realized, and the cost of ownership of the optical fiber temperature measuring device can be shared by thousands of users.

In one possible design, the temperature measuring optical fiber of the optical fiber temperature measuring device of the embodiment 13 further comprises a low thermal resistance connection with the indoor heating pipeline, the heating interface, the floor, the door window, the wall and the ceiling; and is connected with a fire alarm monitoring device through signals;

thus, the artificial environment of the user and the working condition and indoor temperature of related equipment can be measured; and can realize fire alarm detection-when the fire condition happens, the detailed temperature field state of the scene can be known, which is beneficial to fire extinguishing and can evaluate the state of the automatic spraying facility. The optical fiber temperature measurement system has stronger high temperature resistance and longer duration in a fire scene.

FIG. 18 and example 14;

embodiment 14, a soil source cross-season cold and hot heat pump cooling and heating system is manufactured, which comprises a U-shaped well system, more than one heat exchange interface 82 arranged inside a structure 81, a heat pump unit 83 and a control system; the U-shaped well system comprises a plurality of U-shaped wells 15, wherein the U-shaped wells 15 comprise two vertical sections 16 and one semicircular section 9; more than 95% of the U-shaped well extends into the soil 17; the U-shaped wells are connected together by a parent pipe 79 to form a U-shaped well system; the distance between the two vertical sections is 0.5-3 meters; taking the central lines of two vertical sections 16 of the U-shaped well and the connecting lines of the two ends of the central lines as boundaries to form a plane, and taking more than 90% of soil at the position which is 0.4 meter away from the plane, wherein the state of the soil is the same or basically the same as that of the soil before well construction; and a heating medium is filled in the U-shaped well. The heat pump unit 83 is respectively connected with the U-shaped well system and the heat exchange interface 82 in a heat exchange way to form a soil source heat pump cooling and heating system.

Working principle of a soil source heat pump cooling and heating system in embodiment 14: in summer, the U-shaped well system is in heat exchange connection with a heat exchange interface inside a structure through a pipeline to absorb heat of a cooling load, and the heat is stored in soil where the U-shaped well system is located; in winter, through four-way valve conversion, the U-shaped well system is connected with the heat pump unit pipeline to release heat in the soil where the U-shaped well system is located to serve as a low-temperature heat source of the heat pump unit, and the heat of the low-temperature heat source is used for heating after the temperature of the heat pump unit is increased.

The beneficial effects of embodiment 14 are: a soil source heat and cold storage system is provided.

FIG. 18 and example 15 are given;

embodiment 15, a cold accumulation type heat pump cold supply system is manufactured, which comprises a U-shaped well system, more than one heat exchange interface 82 arranged in a structure 81, a heat pump unit 83 and a control system; the U-shaped well system comprises a plurality of U-shaped wells 15, wherein the U-shaped wells 15 comprise two vertical sections 16 and one semicircular section 9; more than 95% of the U-shaped well extends into the soil 17; the distance between the two vertical sections is 0.5-3 meters; taking the central line of the U-shaped well pipe and the connecting lines at the two ends of the central line as boundaries to form a plane, wherein more than 90% of soil at the position which is 0.4 meter away from the plane is in the same or basically the same state as the state before well digging; a heating medium is poured into the U-shaped well; the heat pump unit 83 is respectively connected with the U-shaped well system and the heat exchange interface 82 in a heat exchange mode to form a cold accumulation type heat pump cold supply system.

Working principle of example 15: in the daytime during the cooling period, the U-shaped well soil heat storage and heat storage system is in heat exchange connection with a heat exchange interface inside a structure through a pipeline to reduce the self cooling capacity and increase the temperature; and in the night valley electricity period during the cooling period, the heat pump unit is used for refrigerating, the U-shaped well soil heat storage and heating system is in heat exchange connection with the heat pump unit for heating, and the self heat energy of the U-shaped well soil heat storage and heating system is used for reducing the temperature and reducing the accumulated cold accumulation. The cold accumulation type heat pump cold supply system can greatly reduce peak electricity consumption.

FIG. 18 and example 16 are given;

embodiment 16, a radiation refrigeration cold accumulation type cold supply system is manufactured, comprising more than one U-shaped well system, more than one cooling facility 84, more than one heat exchange interface 82 arranged inside a structure 81 and a control system; the U-well system comprises a plurality of U-wells 15; the U-well 15 comprises two vertical sections 16 and one semicircular section 9; more than 95% of the U-shaped well extends into the soil 17; the U-shaped wells are connected together by a parent pipe 86 to form a U-shaped well system; the distance between the two vertical sections is 0.5-3 meters; taking the central line of the vertical section of the U-shaped well and the connecting lines of the two ends of the central line as boundaries to form a plane, wherein more than 90 percent of soil at the position which is 0.4 meter away from the plane is in the same or basically the same state as the state before well digging; and a heating medium is filled in the U-shaped well. The U-shaped well system of the U-shaped well soil cold and heat storage system is respectively in heat exchange connection with the cooling facility 84 and a heat exchange interface 82 inside the structure through a pipeline and a valve; a radiation refrigeration cold accumulation type cold supply system is formed.

Working principle of radiation refrigeration cold accumulation type cold supply system of embodiment 16: during daytime cold supply in the cold supply season, the heat exchange interface 82 absorbs heat at the cold supply load and causes the temperature of the soil heat and cold storage system to rise; during the night heat release period in the cooling season, the U-well soil heat storage and removal system dissipates heat to the environment through the cooling facility 84; the cooling facility 84 includes a cooling tower and/or a high emissivity solar collector. The solar heat collector with high emissivity can cool by radiating heat to the environment through conduction, convection and heat radiation to reduce the temperature of the heat medium. Some continental climates can accumulate enough cold energy at night for daytime cooling.

In one possible design, example 16 uses a U-well soil heat and cold storage system consisting of a cooling U-well soil heat and cold storage system and a heating U-well soil heat and cold storage system. The method is suitable for continental climate areas with large day and night temperature difference and intersection of heating seasons and cooling seasons; the solar heat collector with high emissivity is adopted, so that hot water at about 50 ℃ can be effectively provided in daytime to supplement heat energy for a heating U-shaped well soil heat and cold storage system; and the cooling capacity of about 0 ℃ can be effectively provided at night to supplement cold energy for the cold and heat storage system of the cold supply U-shaped well soil.

In one possible design, example 16 includes a heat exchange interface, a heat pump unit, and a control system disposed inside a structure;

during daytime cooling, the U-shaped well soil heat storage and heat storage system is in heat exchange connection with a heat exchange interface inside a structure through a pipeline to reduce the self cooling capacity and increase the temperature; during night valley electricity, the heat pump unit is used for refrigerating, the U-shaped well soil heat storage and heating system is connected with a heat pump unit pipeline for heating, heat in soil where the U-shaped well soil heat storage and heating system is located is discharged to serve as a low-temperature heat source of the heat pump unit, and the heat of the low-temperature heat source is used for heating after the temperature of the heat pump unit is raised; the self heat energy of the U-shaped well soil cold and heat storage system is reduced, and the temperature is lowered.

In one possible design, example 16 does so in summer season, first using a portion of the U-well soil heat storage system for cooling; when the temperature of the U-shaped well is increased and cooling cannot be performed, other U-shaped well soil heat storage systems are started for cooling; for the U-shaped well soil heat storage and heat storage system with the temperature increased and the incapability of cooling, the temperature of the U-shaped well soil heat storage and heat storage system is further increased by using heat rejection of a refrigerating air conditioner or heat input energy of industrial heat rejection of an air heat exchanger, a solar heat collector and a heat pump unit to heat in winter;

In winter heating season, heat energy of part of the U-shaped well soil cold and heat storage system is heated by the heat pump unit and then used for heating; when the temperature of the heat pump unit is reduced and heating cannot be performed, starting the other U-shaped well soil heat storage and heating systems to provide heat energy for the heat pump unit; and if the temperature of the U-shaped well soil heat storage and heating system which can not heat is found to rise, the heat pump unit is used for extracting the heat energy again so as to keep the low temperature for cooling in summer.

In one possible design, example 16 includes a heat exchange interface disposed inside a structure, a high emissivity solar collector, and a control system; the U-shaped well soil cold and heat storage system comprises a first system, a cold supply U-shaped well soil cold and heat storage system and a second system, wherein the first system is a heating U-shaped well soil cold and heat storage system; the average operating temperature of the first system comprises less than 12 ℃; the average operating temperature of the second system is higher than 29 ℃; the first system and the second system are respectively connected with a heat exchange interface inside the structure and the solar heat collector through pipelines and valves in a heat exchange manner; during the daytime cooling period of the continental climate, the first system is connected with a heat exchange interface inside the structure to reduce the self cooling capacity and increase the temperature; the second system is connected with the solar heat collector to store heat energy for temperature rise; during the night heating period of the continental climate, the second system is connected with a heat exchange interface inside the structure to heat the self heat energy, so that the temperature is reduced; the first system is connected with the solar heat collector to reduce the heat dissipation temperature to the environment.

The invention aims at providing a soil cold and heat storage system with a multi-working-temperature U-shaped well.

This object of the invention is achieved in that: according to the method, a soil heat storage system with multiple working temperatures U-shaped wells is built, and the soil heat storage system comprises more than two arrays of first array U-shaped wells and second array U-shaped wells which are different in depth and are communicated by independent main pipes; the vertical section of the first array U-shaped well passing through the second array U-shaped well is provided with a heat insulation sleeve; the first array U-shaped wells do not participate in heat exchange of the soil layer where the heat insulation sleeve is positioned; the first array of U-shaped wells and the second array of U-shaped wells have more than 40% intersection at the surface of the tops of each.

The beneficial effects include: by first using the thermal energy of the soil cold and heat storage system in which the second array of U-shaped wells 86 are located, the heat loss of the entire soil cold and heat storage system through the ground surface can be reduced.

FIG. 19 shows example 17;

embodiment 17, a multi-temperature U-well soil cold and heat storage system agricultural greenhouse 87 is manufactured, comprising an agricultural greenhouse 87, a heat exchange interface arranged in the agricultural greenhouse 87, and two array U-wells respectively communicated by independent master pipes 79: a first array of U-shaped wells 85, represented by a dashed U-shaped pattern, and a second array of U-shaped wells 86, represented by a double-line U-shaped pattern; the first array of U-shaped wells 85 is 80 meters deep; the second array of U-shaped wells 86 has a depth of 10 meters; the first array of U-shaped wells 85 carries insulating sleeves 59 at vertical sections passing over the second array of U-shaped wells 86; the surface locations and areas of both the first array of U-shaped wells 85 and the second array of U-shaped wells 86 are identical; the effective heat storage area is from underground 2 meters to underground 80 meters;

The heat exchange interface comprises a water pipe radiator; the U-shaped well system is communicated with the water pipe radiator and driven by a circulating pump, so that the heating of the U-shaped well soil cold and heat storage system to the agricultural greenhouse 87 is realized.

The working principle of example 17 includes: assuming heating starts and ends, the temperatures of the soil heat and cold storage systems are 44 ℃ and 16 ℃, respectively. In winter, heat energy is firstly obtained through heat exchange between the second array U-shaped wells 86 and the soil cold and heat storage system, and the temperature is reduced to about 30 ℃, so that the loss of heat dissipation of the U-shaped well soil cold and heat storage system from the ground surface is greatly reduced. And because the soil 17 with the depth of ten meters is blocked, the space of the first array U-shaped well 85 below the second array U-shaped well 86 is in a negligible part of the heat energy of the soil heat and cold storage system radiating from the ground surface.

If the soil heat and cold storage system of the space where the first array U-shaped well 85 below the second array U-shaped well 86 is located is equally divided into a left area, a middle area and a right area which are parallel; and when the cold flow arrives for the second and the following times, the heating temperature is 44 ℃ at the beginning each time when the cold flow is started respectively. Because of the high heat energy loss from the ground surface, the temperature of the soil heat and cold storage system can be significantly reduced. The heat insulation layer is arranged for covering, and no commercialized technical scheme is disclosed at present.

The heating is achieved through a circulating pump 88 and a heat exchange interface which are arranged in the greenhouse, and the heat exchange interface comprises a water pipe radiator 89. The heat exchange in the greenhouse can be particularly referred to in the related art.

The lower layered U-shaped well system of the layered U-shaped well soil cold and heat storage system has small heat loss, and is also beneficial to the cross-season storage of waste heat with the temperature of more than 80 ℃ for industrial use. The higher the temperature at which thermal energy is stored, the greater the distance between the two vertical sections of the U-well.

Claims

1. The gravity head is used for manufacturing a U-shaped well device for heat exchange with soil by sinking a traction well pipe and is characterized by comprising a drag reduction surface and a water supply network; the drag reduction surface comprises a plurality of outlet holes; the outlet is sequentially communicated with a water supply network, a valve, a water supply pipe and a water supply source; the water is discharged from each outlet hole, the water is discharged to enable soil slurry on the drag reduction surface to be slurried, the boundaries of soil are washed and dispersed by the water to continuously retreat, and the water is discharged to form a fluid thin layer on the drag reduction surface; the fluid thin layer reduces the travelling resistance of the gravity head in soil; the gravity head comprises a connecting interface with the well pipe semicircular section; and realizing transmission connection with the well pipe semicircular section through the connecting interface, and pulling the well pipe to sink.

2. A gravity head as claimed in claim 1, wherein

The water supply source outputs high-pressure gas, and the gas is discharged to loosen soil on the drag reduction surface; the soil boundary is washed out by the air to collapse and continuously retreats, and a fluid thin layer is formed between the soil boundary and the drag reduction surface; the fluid thin layer reduces the resistance of soil to the sinking of the gravity head; the exit gas diffuses to the environment; the gravity head comprises a connecting interface with the well pipe semicircular section; the transmission connection with the semicircular section of the well pipe is realized through the connection interface, and the well pipe is pulled to sink, and finally a U-shaped well penetrating into soil is formed; or alternatively

Each drag reduction surface comprises a plurality of inlet holes; the inlet is communicated with the slurry return pipe through the slurry return pipe network; or,

at least comprises a group of two fins; the fins are connected with the gravity head through a one-dimensional revolute pair mechanism and are in transmission connection with respective driving mechanisms; the state of the gravity head in the sediment is changed according to the change of the state of the fin; or,

the gravity head comprises a gravity head for pushing out a semicircular section of a well pipe from the side surface, a drag reduction surface, a semicircular section caulking groove of the well pipe, a plurality of elastic plates, a plurality of movable fences and electric fence jacks, wherein the drag reduction surface is arranged on the surface of the gravity head or is integrally manufactured with the surface of the gravity head; the drag reduction surface comprises a plurality of outlet holes; a semicircular section is arranged in the semicircular section caulking groove; the elastic plate is arranged along one side of the bottom edge of the semicircular segment caulking groove and occupies at least the position of the semicircular segment caulking groove; the elastic plate is a bow-shaped plate, and the middle of the elastic plate is connected with the gravity head by a riveting piece; the movable fence flattens the elastic plate through the semicircular section; the bottom of the movable fence is connected with the gravity head by a one-dimensional revolute pair mechanism, and the movable fence has two stable states: 1) A locking state that the movable fence is inserted into the electric fence jack and 2) an opening state that the movable fence is separated from the electric fence jack; or alternatively

Comprises a plurality of groups of screw propellers which are arranged at the bottom of a gravity head and rotate in opposite directions.