CN219531246U - LNG storage tank pile foundation heat transfer device - Google Patents

Abstract

The utility model discloses an LNG storage tank pile foundation heat exchange device which comprises an energy pile system, a heat exchange pipe, an air conditioning system and an air-temperature type gasifier, wherein the output end of the energy pile system is connected with the air conditioning system and the air-temperature type gasifier through heat exchange pipelines and supplies energy to the air conditioning system and the air-temperature type gasifier, the LNG storage tank pile foundation heat exchange device also comprises a plurality of inspection wells and pipeline wells, the energy pile system comprises a plurality of energy piles, the plurality of energy piles are all provided with heat exchange pipes, and the water inlets of the heat exchange pipes are connected with the water inlet pipes of the inspection wells. According to the utility model, the heat exchange pipes in the energy pile system are partitioned, the plurality of inspection wells are arranged, the heat exchange pipes in different areas are connected with the inspection wells, the classification of pipelines is realized, the arrangement of the pipeline wells is realized, the pipeline wells are connected with the inspection wells, the summarization of the plurality of inspection wells is realized, and the heat exchange pipes are convenient to overhaul.

Description

LNG storage tank pile foundation heat transfer device

Technical Field

The utility model relates to the technical field of geothermal application of LNG receiving stations, in particular to a pile foundation heat exchange device of an LNG storage tank.

Background

In 2021, 9 months, several ideas about promotion of geothermal energy development and utilization issued by the national energy agency are proposed: by 2025, the geothermal energy heating (cooling) area was increased by 50% over 2020; by 2035, the geothermal energy heating (cooling) area strives to double as compared to 2025. It is expected that the development and utilization of shallow geothermal energy have great practical requirements and application prospects.

In the summer 2022, the power supply of the whole country caused by extremely high temperature is in tension, and the LNG receiving station belongs to a large-scale electricity utilization guarantee important unit, and the station area comprises a plurality of electricity utilization and electricity consumption process equipment facilities. The receiving station normally operates and relies on more stable power supply sources, on one hand, government special supply and supply protection measures can be used as basic enterprise power supply guarantee, on the other hand, the receiving station is used as national enterprise, and the regional energy stability and responsibility are needed to be maintained, so that the energy consumption is effectively reduced, the emission is reduced and the environment is protected in production operation activities, along with the continuous increase of the use requirement of green clean energy in China, the construction speed of the Liquefied Natural Gas (LNG) receiving station is accelerated, the large storage tank has the defect of huge energy consumption, and reasonable energy-saving and emission-reducing measures are needed to be adopted, and the shallow geothermal energy is developed.

The patent document with the prior patent publication number of CN 217130967U discloses a heat exchange system of an LNG receiving station, which comprises an energy pile system, an air conditioning system, an air-temperature gasifier, a heat exchange tube, a first heat exchange device and a second heat exchange device, wherein the energy pile system comprises a plurality of energy piles, two ends of water tubes of the energy piles are respectively connected with the heat exchange tube, the first heat exchange device is connected with the heat exchange tube, a pipeline of the air conditioning system is connected with the first heat exchange device, the heat exchange tube is connected with the second heat exchange device, and the second heat exchange device is connected with the air-temperature gasifier.

But its energy stake system's heat transfer pipe all directly links to each other with heat transfer device, because energy stake system pipeline is complicated, and all directly links to each other with heat transfer device, in case the problem, can't directly judge and find out the accident pipeline and overhaul, and the heat transfer pipe is fixed behind the steel reinforcement cage of pile foundation simultaneously, because pile foundation construction needs pouring concrete, leads to the vertical deformation of heat transfer pipe easily.

Disclosure of Invention

The utility model aims to solve the technical problems of facilitating the maintenance of a heat exchange system and reducing the vertical deformation of the heat exchange pipe during pouring.

The utility model solves the technical problems by the following technical means: the utility model provides a LNG storage tank pile foundation heat transfer device, includes energy stake system, heat transfer pipe, air conditioning system, air temperature formula gasifier, the output of energy stake system links to each other with air conditioning system, air temperature formula gasifier through the heat transfer pipeline to for its energy supply still includes a plurality of inspection shafts, piping shaft, energy stake system includes a plurality of energy stakes, and is a plurality of the energy stake all is provided with the heat transfer pipe, the water inlet of heat transfer pipe links to each other with the inlet tube of inspection shaft, the delivery port of heat transfer pipe links to each other with the outlet pipe of inspection shaft, return water end and the play water end of inspection shaft link to each other with the return water end and the water supply end of piping shaft through return water house steward and water supply house steward respectively, the heat transfer pipe is the setting of 3U type.

Through carrying out subregion to the heat exchange tube in the energy stake system to set up a plurality of inspection shafts, be connected the heat exchange tube in the different regions with the inspection shaft, realized the classification of pipeline, through the setting of piping shaft, and make it be connected with the inspection shaft, realized gathering a plurality of inspection shafts, be convenient for overhaul the heat exchange tube, through setting up the heat exchange tube to the 3U type, can offset the vertical deformation that causes when concrete placement.

As the preferable technical scheme, the energy pile system further comprises a water inlet pipe and a water return pipe, and the water inlet pipe and the water return pipe are respectively connected with the water inlet pipe and the water outlet pipe of the inspection well.

As the preferable technical scheme, be equipped with water knockout drum barrel, water collector barrel in the inspection shaft, water knockout drum barrel one end links to each other with the inlet tube, and the other end links to each other with the delivery pipe through water supply header pipe and piping shaft, water collector barrel one end links to each other with the wet return, and the other end links to each other with the wet return of piping shaft through the wet return header pipe.

As the preferable technical scheme, the number of the energy piles is 120, two energy piles are connected in series to form a heat exchange branch, a plurality of heat exchange branches are respectively provided with a water inlet pipe and a water outlet pipe, the water inlet pipe of the heat exchange branch is connected with one end of the water separator cylinder, and the water outlet pipe of the heat exchange branch is connected with one end of the water collector cylinder.

As a preferable technical scheme, the inspection well comprises two first inspection wells and two second inspection wells, wherein the first inspection wells are 14 branch inspection wells, the second inspection wells are 16 branch inspection wells, and the two first inspection wells and the two second inspection wells are distributed in a central symmetry manner.

As the preferable technical scheme, all be equipped with the static balance valve on the outlet pipe of connecting on the water collector barrel, all set up the butterfly valve on the inlet tube of connecting on the water separator barrel, still be connected with the bleed valve on the outlet pipe through the crossover sub.

As the preferable technical scheme, be equipped with first water supply main pipe, the second water supply main pipe of intercommunication and the first return water main pipe and the second return water main pipe of intercommunication each other in the piping shaft, first water supply main pipe passes through the water supply header pipe and communicates with the water knockout drum barrel of inspection shaft, first return water main pipe passes through water return header pipe and communicates with the water collector barrel.

As the preferable technical scheme, butterfly valves are arranged on the first water main pipe, the second water main pipe, the first water return main pipe and the second water return main pipe.

As the preferable technical scheme, all be equipped with the bleed valve on first water main pipe, second water main pipe, first return water main pipe, the second return water main pipe, still be provided with the water escape valve on first water main pipe and the first return water main pipe.

As the preferable technical scheme, the energy pile comprises a reinforcement cage, a heat exchange tube, a stress sensor and a strain sensor, wherein the heat exchange tube is wound and fixed on the inner side of the reinforcement cage, the stress sensor and the strain sensor are both fixed in the reinforcement cage, and a pile body is formed after concrete is poured in the reinforcement cage.

The utility model has the advantages that:

(1) According to the utility model, the heat exchange pipes in the energy pile system are partitioned, the plurality of inspection wells are arranged, the heat exchange pipes in different areas are connected with the inspection wells, the classification of pipelines is realized, the pipeline wells are arranged, the pipeline wells are connected with the inspection wells, the collection of the plurality of inspection wells is realized, the heat exchange pipes are convenient to overhaul, and the vertical deformation caused during concrete pouring can be counteracted by arranging the heat exchange pipes in a 3U shape.

(2) According to the utility model, through the arrangement of the static balance valve, the air release valve and the adapter, hydraulic balance among different branches, free rotation among different energy pile areas and flexible switching operation are realized.

(3) According to the utility model, the energy pile heat exchange system is used in the LNG receiving station factory, so that the support of the upper structure can be met, the heat required by the LNG temperature supplementing and outputting process can be provided, and the energy utilization rate is improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a pile foundation heat exchange device for an LNG storage tank according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of a top view structure of an energy pile of an LNG storage tank pile foundation heat exchange device according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a first piping well structure of an LNG tank pile foundation heat exchange device according to an embodiment of the present utility model;

fig. 4 is a schematic A-A section structure of fig. 3 of an LNG tank pile foundation heat exchange device according to an embodiment of the present utility model;

fig. 5 is a schematic view of a section B-B of fig. 3 of a heat exchange device for a pile foundation of an LNG storage tank according to an embodiment of the present utility model;

fig. 6 is a schematic diagram of a second piping well structure of an LNG tank pile foundation heat exchange device according to an embodiment of the present utility model;

fig. 7 is a schematic view of a C-C section structure of the heat exchange device for the pile foundation of the LNG storage tank according to the embodiment of the present utility model;

fig. 8 is a schematic diagram of a D-D section structure of fig. 6 of an LNG tank pile foundation heat exchange device according to an embodiment of the present utility model;

fig. 9 is a schematic diagram of a piping well structure of an LNG tank pile foundation heat exchange device according to an embodiment of the present utility model;

fig. 10 is a schematic structural diagram of E-E of fig. 9 of an LNG tank pile foundation heat exchange device according to an embodiment of the present utility model;

FIG. 11 is a schematic F-F structural diagram of the heat exchange device of the pile foundation of the LNG storage tank, provided by the embodiment of the utility model;

fig. 12 is a schematic diagram of an energy pile structure of an LNG tank pile foundation heat exchange device according to an embodiment of the present utility model;

reference numerals: 1. an energy pile system; 11. energy piles; 1101. a reinforcement cage; 1102. a heat exchange tube; 1103. a stress sensor; 1104. a strain sensor; 12. a water inlet pipe; 13. a water outlet pipe; 2. an air conditioning system; 3. an air temperature gasifier; 4. a connecting pipeline; 5. an inspection well; 501. a water separator cylinder; 502. a water collector cylinder; 503. a static balancing valve; 504. a bleed valve; 505. a conversion joint; 51. a first manhole; 52. a second manhole; 53. manhole of inspection well; 54. a pipe well sump; 6. a tubing well; 61. a water supply main; 611. a first water supply main; 612. a second water supply main; 62. a backwater main pipe; 621. a first return water main pipe; 622. a second return water main pipe; 63. a pipe well manhole; 64. a water collecting pit; 7. a water return main pipe; 8. a water supply main pipe; 9. a pressure gauge; 10. a thermometer; 14. butterfly valve; 15. a waterproof sleeve.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 2, an LNG storage tank pile foundation heat exchange device includes an energy pile system 1, an air conditioning system 2, an air-temperature gasifier 3, a connecting pipeline 4, an inspection well 5, and a piping well 6; according to the number of the energy piles 11 in the energy pile system 1, a plurality of inspection wells 5 are arranged, in the embodiment, taking four inspection wells 5 as an example, the water return end and the water outlet end of the energy pile system 1 are respectively collected into the four inspection wells 5 in the corresponding areas, the water return end and the water outlet end of the inspection wells 5 are respectively connected with the water return end and the water supply end of the pipeline well 6 through a water return main pipe 7 and a water supply main pipe 8, the pipeline well 6 is heated or cooled through a connecting pipeline 4 and an air-temperature gasifier 3 of an air conditioning system 2 and a gasification zone of a factory, and the arrangement of the plurality of inspection wells 5 is convenient for later maintenance, referring to fig. 8, a water separator cylinder 501, a water collector cylinder 502, a static balance valve 503, a deflating valve 504 and a conversion joint 505 are arranged in the inspection wells 5, so that hydraulic balance among different branches, free rotation among different energy pile areas and flexible switching operation are realized;

referring to fig. 12, the energy pile system 1 includes a plurality of energy piles 11, a water inlet pipe 12 and a water outlet pipe 13, for example, a certain LNG receiving station project 2 sets of 10 cubic meters of storage tanks, hereinafter referred to as a 1# storage tank and a 2# storage tank, each set of storage tank concrete filling piles 300, the pile length is 53 meters, 180 common pile foundations are uniformly distributed in the middle, the pile foundations are reinforced concrete drilling filling piles, and the pile diameter is 1.2m; in the embodiment, the energy pile system 1 comprises two storage tanks, taking an energy pile system 1 of one storage tank as an example, the energy pile system 1 comprises 120 energy piles 11, the 120 energy piles 11 are transformed into the energy piles 11 through early-stage experiments and calculation, the 120 energy piles 11 are in double-layer annular shape and distributed and arranged on the outer side of a common pile foundation, the radius of a circle of the inner-layer annular energy pile 11 is 32500mm, 56 outer-layer annular energy piles 11 are 36100mm, 64 outer-layer annular energy piles are selected and transformed into the energy piles 11, the later-stage overhaul is facilitated, and meanwhile, the optimal heat exchange effect can be achieved through the transformation of part of pile foundations due to high pile foundation density;

in this embodiment, 2 energy piles 11 are used as a group, the buried pipe length of the LNG storage tank pile is 50 meters, the heat exchange pipes 1102 in a single pile are arranged by adopting 3U-shaped pipes, the heat exchange pipes 1102 of two groups of energy piles 11 are connected in series to form a branch and are provided with a water inlet pipe 12 and a water outlet pipe 13, and the water inlet pipe 12 and the water outlet pipe 13 of each group of energy piles 11 are connected to the water collector cylinder 502 and the water separator cylinder 501 in the inspection well 5 in the corresponding area;

referring to fig. 12, a single energy pile 11 comprises a reinforcement cage 1101, a heat exchange tube 1102, a stress sensor 1103 and a strain sensor 1104, wherein the heat exchange tube 1102 is arranged in a 3U shape, the reinforcement cage 1101 is sleeved in a drill hole, the drill hole is formed in a soil body, the heat exchange tube 1102 is wound on the inner side of the reinforcement cage 1101, the stress sensor 1103 is welded and fixed on the side surface of a reinforcement to be detected of the reinforcement cage 1101 to detect the stress of the reinforcement, the strain sensor 1104 is bound on the reinforcement of the reinforcement cage 1101 to detect the strain of concrete, and after the heat exchange tube 1102, the stress sensor 1103 and the strain sensor 1104 are all arranged on the reinforcement cage 1101, the concrete is poured into the drill hole to form a pile foundation;

in actual construction, the reinforcement cages 1101 are manufactured in a segmented mode, the heat exchange tubes 1102 are arranged on the reinforcement cages 1101 manufactured in the segmented mode, and when the reinforcement cages 1101 manufactured in the segmented mode are connected in a whole segment mode, after the reinforcement cages 1101 in adjacent segments are connected, the heat exchange tubes 1102 in different segments are connected;

referring to fig. 12, heat exchange tube 1102 includes a top heat exchange tube section, a middle heat exchange tube section and a bottom heat exchange tube section, in this embodiment, the middle heat exchange tube section and the bottom heat exchange tube section are all 3U-shaped, and reinforcement cage 1101 includes a top reinforcement cage section, a middle reinforcement cage section and a bottom reinforcement cage section, and the top heat exchange tube section is wound on the top reinforcement cage section, and the middle heat exchange tube section is wound on the middle reinforcement cage section, and the bottom heat exchange tube section is wound on the bottom reinforcement cage section, and the bottom of the top heat exchange tube section is connected and communicates with the top of the middle heat exchange tube section, and the bottom of the middle heat exchange tube section is connected and communicates with the top of the bottom tube heat tube section.

According to the ground temperature distribution, in order to efficiently develop and utilize shallow geothermal energy and reduce the interference to pile foundation construction, namely, the deformation caused by concrete pouring on the heat exchange tube 1102, the heat exchange tube 1102 in the embodiment adopts 3U-shaped arrangement, specifically, the heat exchange tube 1102 is a straight tube in a region from the ground surface to the ground surface 1.5m, the region below the ground surface 1.5m is a stratum heat preservation region, the heat exchange tube 1102 adopts 3U-shaped arrangement, and the joint is connected by adopting an electric melting technology.

The use process of the pile foundation comprises the following steps:

s0, manufacturing a reinforcement cage 1101 in a segmented mode;

s1, heat exchange tube 1102 arrangement: binding bands are adopted to bind the inner side of the reinforcement cage 1101 according to the design after the reinforcement cage 1101 is manufactured in a segmented mode, and the binding density is not less than 1/m; the heat exchange tube 1102 is lowered in sections along with the reinforcement cage 1101, and before the reinforcement cage 1101 is spliced, the heat exchange tube 1102 is filled with water, so that the heat exchange tube 1102 is prevented from being flattened by concrete after being lowered; the upper heat exchange tube 1102 and the lower heat exchange tube 1102 are connected by adopting an electric melting technology; after the joint of the heat exchange tube 1102 is sufficiently cooled, connecting main reinforcements of the reinforcement cage 1101, and completing the supplementing work of stirrups at the joint; corresponding protective measures are taken in the welding process of the stirrups so as to avoid the heat exchange tube 1102 from being damaged by heating; the heat exchange tube 1102 moves outwards for a certain distance from the inner side of the reinforcement cage along the radial direction of the heat exchange tube 1102 at the position 1.5m below the designed ground elevation, but is always kept at the inner side of the reinforcement cage 1101 so as to avoid damage of the heat exchange tube caused by pile cutting, the length of the heat exchange tube extending out of the ground is not less than 1.5m, the heat exchange tube is wrapped by adopting iron sheets after sealing, and corresponding positioning mark work is performed;

s2, performing a hydraulic test, wherein the hydraulic test comprises the following steps of: carrying out a first hydraulic test on the current situation of each water supply and return branch of the energy pile 11, stabilizing the pressure for at least 30min under test pressure, wherein the pressure drop after the pressure stabilization is not more than 3%, and no leakage phenomenon exists; after the water inlet pipe 12 and the water outlet pipe 13 of each group of energy piles 11 are connected with the water separator cylinder 501 and the water collector cylinder 502 of the inspection well 5, a second water pressure test is carried out before backfilling, and the pressure is stabilized for at least 2 hours under the test pressure without leakage; after the energy pile ground source heat pump system is completely installed, flushing, exhausting and backfilling are completed, performing a third hydraulic test; stabilizing the pressure for at least 12 hours under test pressure, wherein the pressure drop after stabilizing the pressure is not more than 3%; the hydraulic test adopts a manual pump to slowly boost pressure, and the pressure is observed and checked at any time in the boosting process, so that leakage cannot occur; the air pressure test is not used for replacing the water pressure test; after the pipeline is installed and the pressure test is qualified, the system is flushed, and the flushing flow is 2 times of the design flow.

S3, arranging a sensor, specifically: dividing each energy pile 11 pile body into 12 sections, wherein the sections 1 to 12 are sequentially from top to bottom; the vertical stress sensors 1103 and the strain sensors 1104 are symmetrically arranged on the same cross section, the stress meters 1103 are vibrating wire type rebar meters, and 24 single piles (12 single piles) are welded on the side surface of the rebar to be tested so as to monitor the stress of the rebar; the strain sensor 1104 is a strain gauge, and 24 strain gauge mono-piles (12 on one side) are combined on the steel bars to detect the strain of the concrete.

Referring to fig. 3 to 8, the inspection well 5 comprises a first inspection well 51 of two 14 branches and a second inspection well 52 of two 16 branches, the first inspection well 51 and the second inspection well 52 are underground structures and are provided with inspection well manholes 53, a water separator cylinder 501 and a water collector cylinder 502 are arranged in the first inspection well 51, the input end of the water separator cylinder 501 is connected with a water supply pipe of the pipeline well 6 through a water supply header pipe 8, the output end of the water separator cylinder 501 is communicated with a water inlet pipe 12 of 14 groups of energy piles 11 in the area, the input end of the water collector cylinder 502 is communicated with a water outlet pipe 13 of 14 groups of energy piles 11 in the area, and the output end of the water collector cylinder 502 is connected with a water return pipe of the pipeline well 6 through a water return header pipe 7; be provided with manometer 9 and thermometer 10 on the water collector barrel 502, all be equipped with static balance valve 503 on the outlet pipe 13 of the connection on the water collector barrel 502, all set up the butterfly valve on the inlet tube 12 of connecting on the water separator barrel 501, guarantee the comprehensive hydraulic balance of outdoor energy stake buried pipe system to realize the switching operation of different section, still be connected with bleed valve 504 through crossover sub 505 on the outlet pipe 13, with the release of releasing the air in the appointed branch road pipeline, guarantee that this branch road heat transfer effect keeps good.

The static balance valve 503 is used for adjusting hydraulic balance of different branches in the energy pile foundation buried pipe, so that the designated branch realizes pressure and flow stabilization and balance in the water collector cylinder 502 and the water separator cylinder 501. In addition, the static balance valve 503 has a shutdown function, and can find a corresponding water supply and return branch in a corresponding inspection well according to the field use requirement if inspection and maintenance can be performed, so that shutdown, inspection and maintenance and hydraulic balance can be realized, switching functions of different sections can be realized according to geothermal conditions, intermittent debugging is performed during the operation of a later system, the function of connecting and converting between the static balance valve 503 and the air release valve 504 with different sizes is realized by the adapter 505, the normalized detection of the heat exchange system is realized by the thermometer 10, the condition of the temperature of the circulating water in the buried pipe of the energy pile is clearly reflected at all times, a water supply and return temperature parameter value is provided, a butterfly valve 14 is adopted for a pipeline valve with the nominal diameter larger than DN50mm, a gate valve with the diameter smaller than or equal to DN50mm is adopted for a valve, the working pressure requirement of all the valve members is not smaller than 1MPa, the working temperature is not lower than 100 ℃, and the installation of various valves should pay attention to configure an operation handle at a position convenient to operate.

In order to ensure reliable operation of the system, the water pressure test is performed by installing the step S2 before and after the installation of the energy pile system 11, and the water pressure test meets the standard.

The second inspection well 52 has the same structure as the first inspection well 51, and the difference is that the number of branches in the corresponding area is different, a water separator cylinder 501 and a water collector cylinder 502 are arranged in the second inspection well 52, the input end of the water separator cylinder 501 is connected with the water supply pipe of the pipeline well 6 through the water supply main pipe 8, the output end of the water separator cylinder 501 is communicated with the water inlet pipe 12 of 14 groups of energy piles 11 in the area, the input end of the water collector cylinder 502 is communicated with the water outlet pipe 13 of 14 groups of energy piles 11 in the area, and the output end of the water collector cylinder 502 is connected with the water return pipe of the pipeline well 6 through the water return main pipe 7; the water collector cylinder 502 is provided with a pressure gauge and a thermometer, the connected water outlet pipes 13 on the water collector cylinder 502 are provided with static balance valves 503, and the connected water inlet pipes 12 on the water separator cylinder 501 are provided with butterfly valves.

Referring to fig. 9, 10 and 11, a pipe manhole 63 is formed in the top of a pipe well 6, the pipe manhole 63 is used for personnel to enter the pipe well 6, a water collecting pit 64 is formed in the bottom of the pipe well 6, a connecting pipeline 4 comprises two water supply main pipes 61 and two water return main pipes 62, a first water supply main pipe 611, a second water supply main pipe 612 and a first water return main pipe 621 and a second water return main pipe 622 which are communicated with each other are respectively, wherein the first water supply main pipe 611 and the first water return main pipe 621 supply a factory front area, the second water supply main pipe 612 and the second water return main pipe 622 supply a gasification area, a water supply main pipe 8 and a water return main pipe 7 of a 1# storage tank are respectively communicated with the first water supply main pipe 611 and the first water return main pipe 621, a water supply main pipe 8 and a water return main pipe 7 of the 2# storage tank are respectively communicated with the second water supply main pipe 612 and the second water return main pipe 622, a butterfly valve 14 in the pipe 6 is respectively marked as a butterfly valve V1, a butterfly valve V2, V3 and V4, a butterfly valve V1 is arranged on the first water supply main pipe 611, and a butterfly valve V3 is arranged on the first water main pipe 621; the butterfly valve V1 is positioned between the junction of the water supply main pipe 8 of the No. 2 storage tank and the first water supply main pipe 611 and the junction of the water supply main pipe 8 of the No. 1 storage tank and the first water supply main pipe 611, and the butterfly valve V2 is positioned between the junction of the water return main pipe 7 of the No. 2 storage tank and the first water return main pipe 621 and the junction of the water return main pipe 7 of the No. 1 storage tank and the first water return main pipe 621.

Referring to fig. 11, the water supply header pipe 8 and the water return header pipe 7 of the 1# storage tank and the water supply header pipe 8 and the water return header pipe 7 of the 2# storage tank are respectively provided with a static balance valve 503 and a deflation valve 504, the first water supply main pipe 611, the second water supply main pipe 612, the first water return main pipe 621 and the second water return main pipe 622 are respectively provided with a deflation valve 504, and the first water supply main pipe 611 and the first water return main pipe 621 are respectively provided with a water drain valve, and in this embodiment, the pipes entering the inspection well 5 and the piping well 6 are respectively sleeved with a waterproof sleeve 15 so as to strengthen the sealing between the pipes and the inspection well 5 and the piping well 6.

The using method comprises the following steps: in summer, butterfly valves V1 and V2 are opened, butterfly valves V3 and V4 are closed, low-temperature water below the earth surface is pumped to the earth surface by a 1# storage tank and 2# storage tank energy pile 11 and supplied to an administrative building in front of a factory, butterfly valves V3 and V4 are opened in winter, butterfly valves V1 and V2 are closed, high-temperature water in an earth surface heat preservation area is pumped to the earth surface and 1# storage tank energy pile 11 is supplied to a gasification area, and 2# storage tank energy pile 11 is supplied to the front of the factory.

The method comprises the following steps: in summer, the butterfly valves V1 and V2 on the first water main pipe 611 and the first water return main pipe 621 are opened, the butterfly valves V3 and V4 on the second water main pipe 612 and the second water return main pipe 622 are closed, water in the heat exchange pipe 1102 of the energy pile system sequentially enters the inspection well 5 and the pipeline well 6 and enters the air conditioning system 2 through the first water main pipe 611 and exchanges heat with the refrigerating medium circulated in the air conditioning system 2, and hot water after heat exchange sequentially enters the pipeline well 6 and the inspection well 5 through the first water return main pipe 621 and is re-converged into the heat exchange pipe 1102 of the energy pile system; in winter, the butterfly valves V1 and V2 on the first water main pipe 611 and the first water return main pipe 621 are closed, the butterfly valves V3 and V4 on the second water main pipe 612 and the second water return main pipe 622 are opened, water in the heat exchange pipe 1102 of the No. 1 storage tank in the energy pile system sequentially enters the inspection well 5 and the pipeline well 6, enters the air conditioning system 2 through the first water main pipe 611 and exchanges heat with the circulating refrigerant therein, and hot water after heat exchange sequentially enters the pipeline well 6 and the inspection well 5 through the first water return main pipe 621 and is re-converged into the heat exchange pipe 1102 of the energy pile system; the water in the heat exchange tube 1102 of the No. 2 storage tank in the energy pile system sequentially enters the inspection well 5 and the pipeline well 6, enters the air-temperature gasifier 3 through the second water main pipe 612 and heats gasified natural gas, and the heated water sequentially enters the pipeline well 6 and the inspection well 5 through the second water return main pipe 622 and is re-converged into the heat exchange tube 1102 of the energy pile system.

The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. The utility model provides a LNG storage tank pile foundation heat transfer device, includes energy stake system, heat exchange tube, air conditioning system, air temperature formula gasifier, the output of energy stake system links to each other with air conditioning system, air temperature formula gasifier through the heat exchange pipeline to for its energy supply, its characterized in that still includes a plurality of inspection shafts, piping shaft, energy stake system includes a plurality of energy stakes, and is a plurality of the energy stake all is provided with the heat exchange tube, the water inlet of heat exchange tube links to each other with the inlet tube of inspection shaft, the delivery port of heat exchange tube links to each other with the outlet pipe of inspection shaft, return water end and the play water end of inspection shaft link to each other with the return water end and the water supply end of piping shaft through return water house steward and water supply house steward respectively, the heat exchange tube is 3U type setting.

2. The LNG tank pile foundation heat exchange device of claim 1, wherein the energy pile system further comprises a water inlet pipe and a water return pipe, the water inlet pipe and the water return pipe being connected to the water inlet pipe and the water outlet pipe of the manhole, respectively.

3. The LNG storage tank pile foundation heat exchange device according to claim 1, wherein a water separator cylinder and a water collector cylinder are arranged in the inspection well, one end of the water separator cylinder is connected with a water inlet pipe, the other end of the water separator cylinder is connected with a water supply pipe of the pipeline well through a water supply main pipe, one end of the water collector cylinder is connected with a water return pipe, and the other end of the water collector cylinder is connected with the water return pipe of the pipeline well through the water return main pipe.

4. The heat exchange device for the pile foundations of the LNG storage tank according to claim 3, wherein the number of the energy piles is 120, two energy piles are connected in series to form a heat exchange branch, a plurality of heat exchange branches are provided with a water inlet pipe and a water outlet pipe, the water inlet pipe of each heat exchange branch is connected with one end of a water distributor cylinder, and the water outlet pipe of each heat exchange branch is connected with one end of a water collector cylinder.

5. The LNG tank pile foundation heat exchange device of claim 4, wherein the inspection wells comprise two first inspection wells and two second inspection wells, the first inspection wells are 14 branch inspection wells, the second inspection wells are 16 branch inspection wells, and the two first inspection wells and the two second inspection wells are centrally symmetrically distributed.

6. The LNG storage tank pile foundation heat exchange device of claim 5, wherein static balance valves are arranged on water outlet pipes connected with the water collector cylinder, butterfly valves are arranged on water inlet pipes connected with the water separator cylinder, and air release valves are connected with the water outlet pipes through adapter joints.

7. The LNG storage tank pile foundation heat exchange device according to claim 5, wherein a first water supply main pipe, a second water supply main pipe, a first water return main pipe and a second water return main pipe which are communicated with each other are arranged in the pipeline well, the first water supply main pipe is communicated with a water separator cylinder of the inspection well through a water supply main pipe, and the first water return main pipe is communicated with the water collector cylinder through a water return main pipe.

8. The LNG tank pile foundation heat exchange device of claim 7, wherein the first water main, the second water main, the first water return main and the second water return main are each provided with butterfly valves.

9. The LNG tank pile foundation heat exchange device of claim 8, wherein the first water main, the second water main, the first water return main and the second water return main are provided with air release valves, and the first water main and the first water return main are further provided with water release valves.

10. The LNG storage tank pile foundation heat exchange device of claim 5, wherein the energy pile comprises a reinforcement cage, a heat exchange tube, a stress sensor and a strain sensor, the heat exchange tube is wound and fixed on the inner side of the reinforcement cage, the stress sensor and the strain sensor are fixed in the reinforcement cage, and a pile body is formed after concrete is poured into the reinforcement cage.