CN219450821U - Inspection well of LNG storage tank pile foundation heat exchanger ground loop system - Google Patents

Abstract

The utility model discloses an inspection well of a ground loop system of an LNG storage tank pile foundation heat exchanger, which comprises a plurality of inspection well bodies, a water return main pipe and a water supply main pipe, wherein the inspection well bodies are circumferentially distributed, a water collecting unit and a water diversion unit are arranged in the inspection well bodies, the input ends of the water collecting unit are respectively communicated with the water return main pipe of the pile foundation heat exchanger, the output ends of the water collecting unit are converged through the water return main pipe and are connected with the input ends of a pipeline well, the input ends of the water diversion unit are connected with the water supply main pipe, and the output ends of the water diversion unit are respectively communicated with the water supply main pipe of the pile foundation heat exchanger. According to the utility model, the heat exchange tubes in the storage tank pile foundation heat exchanger are connected with the inspection wells through the arrangement of the plurality of inspection well bodies, so that the classification of pipelines is realized, and the maintenance of the LNG storage tank pile foundation heat exchanger ground loop system is facilitated.

Description

Inspection well of LNG storage tank pile foundation heat exchanger ground loop system

Technical Field

The utility model relates to the technical field of geothermal application of LNG receiving stations, in particular to an inspection well of a ground loop system of an LNG storage tank pile foundation heat exchanger.

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 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.

In the existing LNG storage tank pile foundation heat exchanger, the water inlet end and the water outlet end of the heat exchanger are directly connected into an energy supply pipeline, and under the condition that the pile foundation heat exchanger is more in arrangement, the connecting branch structure is complex, and once a problem occurs, the heat exchanger is inconvenient to overhaul.

Disclosure of Invention

The utility model aims to solve the technical problem of how to facilitate the overhaul of the LNG storage tank pile foundation heat exchanger.

The utility model solves the technical problems by the following technical means: the utility model provides an inspection shaft of LNG storage tank pile foundation heat exchanger ground loop system, includes a plurality of inspection shaft bodies, return water house steward, water supply house steward, a plurality of the inspection shaft body is circumference and distributes, be equipped with water collecting unit and water diversion unit in the inspection shaft body, water collecting unit's input communicates with the return water collector of pile foundation heat exchanger respectively, and is a plurality of water collecting unit's output is collected and is linked to each other with the input of piping shaft through the return water house steward, and is a plurality of water diversion unit's input all links to each other with the water supply house steward, a plurality of water diversion unit's output communicates with the water supply collector of pile foundation heat exchanger respectively.

Through the setting of a plurality of inspection shaft bodies, be connected the heat exchange tube in the storage tank pile foundation heat exchanger with the inspection shaft, realized the classification of pipeline, in case the problem appears, can inspect according to the pipeline classification condition, be convenient for overhaul LNG storage tank pile foundation heat exchanger ground loop system.

As an optimized technical scheme, the inspection well body comprises a first inspection well and a second inspection well respectively, and the first inspection well and the second inspection well are distributed at equal angular intervals.

As a preferable technical scheme, the first inspection well is a 14-branch inspection well, and the second inspection well is a 16-branch inspection well.

As the preferable technical scheme, the water diversion unit comprises a water diversion barrel, wherein the water diversion barrel is communicated with a water supply header pipe of the pile foundation heat exchanger, and butterfly valves are arranged on the water supply header pipe.

As the preferable technical scheme, the water collecting unit comprises a water collector, wherein the output end of the water collector is communicated with the input end of the pipeline well through a water return header pipe, the input end of the water collector is communicated with a water return header pipe of the pile foundation heat exchanger, and a static balance valve is arranged on the water return header pipe.

As an optimal technical scheme, a static balance valve is arranged on the water return main pipe, and a butterfly valve is arranged on the water supply main pipe.

As an optimal technical scheme, the backwater collecting pipe and the water supply collecting pipe are connected with a deflation valve through a conversion joint.

As a preferable technical scheme, the inspection well body is provided with a manhole and a sump.

As an optimal technical scheme, the elevation of the top of the inspection well is leveled with the ground after construction.

As a preferable technical scheme, the number of the first inspection wells and the number of the second inspection wells are two.

The utility model has the advantages that:

(1) According to the utility model, the heat exchange tubes in the storage tank pile foundation heat exchanger are connected with the inspection wells through the arrangement of the plurality of inspection well bodies, so that the hierarchical connection of pipelines is realized, and the overhaul of the ground loop system of the LNG storage tank pile foundation heat exchanger is facilitated.

Drawings

Fig. 1 is a schematic diagram of the overall structure of an inspection well of a ground loop system of an LNG storage tank pile foundation heat exchanger 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 inspection well of a ground loop system of an LNG storage tank pile foundation heat exchanger according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a first piping well structure of an inspection well of a ground loop system of an LNG storage tank pile foundation heat exchanger according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a cross-section A-A of FIG. 3 of an inspection well of a ground loop system of a LNG storage tank pile foundation heat exchanger according to an embodiment of the present utility model;

FIG. 5 is a schematic view of the cross-sectional B-B structure of FIG. 3 of an inspection well of a ground loop system of a LNG storage tank pile foundation heat exchanger according to an embodiment of the present utility model;

fig. 6 is a schematic diagram of a second piping well structure of an inspection well of a ground loop system of an LNG storage tank pile foundation heat exchanger according to an embodiment of the present utility model;

FIG. 7 is a schematic view of the cross-sectional C-C configuration of FIG. 6 of an inspection well of a ground loop system of a LNG storage tank pile foundation heat exchanger according to an embodiment of the present utility model;

FIG. 8 is a schematic view of the D-D section structure of the inspection well of FIG. 6 of a ground loop system of a LNG storage tank pile foundation heat exchanger according to an embodiment of the present utility model;

fig. 9 is a schematic diagram of a piping well structure of an inspection well of a ground loop system of an LNG storage tank pile foundation heat exchanger according to an embodiment of the present utility model;

fig. 10 is a schematic structural diagram of E-E of fig. 9 of an inspection well of a ground loop system of a LNG storage tank pile foundation heat exchanger provided by an embodiment of the present utility model;

FIG. 11 is a schematic F-F diagram of the inspection well of FIG. 9 of a ground loop system of an LNG storage tank pile foundation heat exchanger according to an embodiment of the present utility model;

fig. 12 is a schematic diagram of an energy pile structure of an inspection well of a ground loop system of an LNG storage tank pile foundation heat exchanger 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, a ground loop system of an LNG storage tank pile foundation heat exchanger with an inspection well comprises 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 pipeline 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 in the drill hole to form a pile foundation heat exchanger;

in this embodiment, the backwater collecting pipe of the pile foundation heat exchanger is a water inlet pipe 12, the water supply collecting pipe of the pile foundation heat exchanger is a water outlet pipe 13, a butterfly valve 14 is arranged on the water outlet pipe 13, a static balance valve 503 is arranged on the water inlet pipe 12, a static balance valve 503 is arranged on the backwater main pipe 7, and a butterfly valve 14 is arranged on the water supply main pipe 8.

In actual construction, the reinforcement cages 1101 are manufactured in a segmented mode, the heat exchange tubes 1102 are mounted on the reinforcement cages 1101 manufactured in the segmented mode, and when the reinforcement cages 1101 manufactured in the segmented mode are connected in the whole segment mode, after the reinforcement cages 1101 in the 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 connection on the water collector barrel 502, all set up the butterfly valve on the inlet tube 12 of connection on the water separator barrel 501, guarantee the comprehensive hydraulic balance of outdoor energy stake buried pipe system, and realize the switching operation in different section, still be connected with bleed valve 504 through crossover sub 505 on the outlet pipe 13, with the release and release the air in the appointed branch road pipeline, guarantee that this branch road heat transfer effect keeps well, inspection shaft 5 top elevation is leveled with the ground after the construction.

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 the 1# storage tank energy pile 11 is supplied to a gasification area, and the 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 an inspection shaft of LNG storage tank pile foundation heat exchanger ground loop system, its characterized in that, including a plurality of inspection shaft bodies, return water house steward, water supply house steward, a plurality of the inspection shaft body is circumference distribution, be equipped with water collecting unit and water diversion unit in the inspection shaft body, the input of water collecting unit respectively with pile foundation heat exchanger's return water house steward intercommunication, a plurality of the output of water collecting unit is collected and is linked to each other with the input of piping shaft through the return water house steward, a plurality of the input of water diversion unit all links to each other with water supply house steward, a plurality of the output of water diversion unit respectively with pile foundation heat exchanger's water supply house steward intercommunication.

2. The manhole of the LNG tank foundation heat exchanger ground loop system of claim 1, wherein the manhole body comprises a first manhole and a second manhole, respectively, the first and second manholes being equiangularly spaced apart.

3. The manhole of the LNG tank foundation heat exchanger ground loop system of claim 2, wherein the first manhole is a 14 branch manhole and the second manhole is a 16 branch manhole.

4. The manhole of the ground loop system of the LNG storage tank foundation heat exchanger of claim 1, wherein the water diversion unit comprises a water diversion barrel, the water diversion barrel is communicated with a water supply header of the foundation heat exchanger, and butterfly valves are arranged on the water supply header.

5. The inspection well of the ground loop system of the LNG storage tank pile foundation heat exchanger according to claim 4, wherein the water collecting unit comprises a water collector, the output end of the water collector is communicated with the input end of the pipeline well through a water return header pipe, the input end of the water collector is communicated with the water return header pipe of the pile foundation heat exchanger, and a static balance valve is arranged on the water return header pipe.

6. The manhole of the LNG tank foundation heat exchanger ground loop system of claim 5, wherein the return water manifold is provided with a static balance valve and the water supply manifold is provided with a butterfly valve.

7. The manhole of a LNG tank foundation heat exchanger ground loop system of claim 6, wherein said return and supply headers are each connected with a bleed valve through a crossover sub.

8. The manhole of the LNG tank foundation heat exchanger ground loop system according to claim 1, wherein the manhole body is provided with a manhole and a sump.

9. The manhole of the ground loop system of the LNG tank pile foundation heat exchanger of claim 1, wherein the manhole top elevation is level with the post construction ground.

10. The manhole of a LNG tank foundation heat exchanger ground loop system of claim 2, wherein the number of first and second manholes is two.