CN111441344B - PCC energy pile of variable power and stake mould thereof - Google Patents
PCC energy pile of variable power and stake mould thereof Download PDFInfo
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- CN111441344B CN111441344B CN202010319762.3A CN202010319762A CN111441344B CN 111441344 B CN111441344 B CN 111441344B CN 202010319762 A CN202010319762 A CN 202010319762A CN 111441344 B CN111441344 B CN 111441344B
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- 239000012530 fluid Substances 0.000 claims abstract description 58
- 239000000463 material Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 238000005192 partition Methods 0.000 abstract description 3
- 238000000638 solvent extraction Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 210000000214 mouth Anatomy 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a PCC energy pile with variable power and a pile mould for preparing the energy pile, wherein the PCC energy pile is provided with separated cold and hot fluid channels, so that the PCC energy pile has higher heat exchange efficiency compared with the traditional PCC energy pile which adopts a cold and hot convection mode for heat exchange; meanwhile, the partition part for partitioning the cold and hot fluid channels can strengthen the structural strength of the PCC energy pile, so that the pile wall thickness is allowed to be smaller than that of the traditional PCC energy pile, and the heat exchange efficiency is further improved; the PCC energy pile of the invention also allows the selection of heat exchange power, and can meet the variability requirement of heat exchange quantity in different seasons.
Description
Technical Field
The invention relates to the field of building energy conservation, in particular to a PCC energy pile with variable power and a pile mould thereof.
Background
The ground source heat pump technology is a building energy-saving means with good application prospect, and the principle is as follows: the heat exchange between the ground source heat pump heat exchanger buried deeply and the heat exchange fluid circulating among the heat exchanger, the heat pump machine room on the ground surface and the terminal nerve heat exchange tube in the building is realized. Due to the huge heat capacity of the formation in the constant temperature zone, the temperature of the formation is basically maintained in a stable interval throughout the year. Therefore, in winter, the temperature of the formation in the constant temperature zone is higher than the temperature of the ground surface, the ground source heat pump extracts underground low-level heat energy to supply heat to the building, and in summer, the temperature of the formation in the constant temperature zone is lower than the temperature of the ground surface, and the ground source heat pump can transfer the heat of the building to the underground to realize cooling.
The key component of the ground source heat pump system is a heat exchanger buried underground deeply, and the heat exchange efficiency and the operation state of the heat exchanger directly determine the efficiency and the stability of the heat pump system. The traditional ground source heat pump technology directly buries a heat exchanger underground, and typical pipe burying modes comprise a horizontal mode and a vertical mode; however, both of the two pipe burying modes require a large occupied land area, and are not suitable for cities with a shortage of land resources and high requirements on energy-saving buildings. Energy stake or energy stake are the means that combines ground heat exchanger and building pile foundation mutually, and it is through tying up heat transfer pipeline on the steel reinforcement cage of pile foundation, squeeze into the stratum along with the pile foundation together, and the pile foundation also becomes secret heat transfer node when providing building structure nature support to the effectual land area that has saved. A typical energy pile can be seen in the precast pile disclosed in chinese patent CN 110453676A. However, such precast piles need to bear large impact force in the piling construction process, and the impact force can cause a great risk to heat exchange pipelines preset in the pile body, so that the pipelines are damaged; meanwhile, the pipe connection is needed in the construction process of the precast pile, and the heat exchange pipe joint at the pile connection part is very difficult to properly process in the process.
To overcome the problems of the prefabricated energy pile, chinese patent (CN102808405A) discloses a PCC energy pile, which utilizes a hollow column cavity of a cast-in-place PCC pile to contain heat exchange fluid, and realizes energy exchange by means of natural convection of cold and hot fluids. The method avoids the problems possibly caused by the binding of the connecting pipe of the precast pile and the heat exchange pipe with the reinforcement cage.
However, the PCC pile belongs to a large-diameter pile, the diameter of the PCC pile is usually more than one meter, and the amount of heat exchange fluid needed by a column cavity for containing the heat exchange fluid is many times higher than that of a precast pile in a mode of using a heat exchange tube as a fluid channel; the response speed of the column cavity to the temperature is too low due to the large amount of heat exchange fluid; in addition, no subarea is arranged in the heat exchange column, heat exchange is carried out by utilizing a fluid natural convection mode, no problem exists when heat is required to be extracted from the underground in winter, heat exchange fluid with low surface temperature is introduced into the bottom of the column cavity, and hot fluid with high temperature is sucked from the top of the column cavity; in summer, however, the fluid from the surface is at a high temperature and migrates like the top after being introduced into the bottom of the column chamber, while the cold fluid at a substantially lower temperature is now at the bottom of the column chamber, but the geothermal pump still draws heat exchange fluid from the top of the column chamber, which makes temperature regulation less effective in summer. On the other hand, after the column cavity of the PCC column is hollowed for placing the heat exchange fluid, the overall structural strength of the PCC column may be reduced because no backfill material is filled in the column cavity.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a PCC energy pile with variable power and a pile mould thereof. The PCC energy pile of the invention has separated cold and hot fluid channels, thus having higher heat exchange efficiency compared with the traditional PCC energy pile which adopts a cold and hot convection mode to exchange heat; meanwhile, the partition part for partitioning the cold and hot fluid channels can strengthen the structural strength of the PCC energy pile, so that the pile wall thickness is allowed to be smaller than that of the traditional PCC energy pile, and the heat exchange efficiency is further improved; the PCC energy stake of the present invention also allows for the selection of heat exchange functions to meet the variability needs of heat exchange in different seasons.
In order to achieve the above purpose, the present invention specifically provides the following scheme: the PCC energy pile comprises a pile body, wherein the pile body comprises an outer pile cylinder and an inner pile cylinder which are arranged concentrically, and further comprises a connecting wall connected between the outer pile cylinder and the inner pile cylinder, the connecting wall extends from the outer surface of the inner pile cylinder to the inner wall of the outer pile cylinder in a radiating mode, so that an interlayer between the outer pile cylinder and the inner pile cylinder is divided into a plurality of fan-shaped cavities; the inner wall of the inner pile barrel encloses an inner pile cavity; at least one of the fan-shaped cavities does not comprise a filling material and is used for receiving heat exchange fluid from a ground heat pump machine room so as to form an inlet cavity of the PCC energy pile; an inlet pipe for heat exchange fluid to enter is arranged at the top of the inlet cavity and is connected to the header pipe through a valve; the bottom of the inlet cavity is provided with a connecting channel communicated with the inner column cavity; the top of the inner column cavity is provided with an outlet pipe for heat exchange fluid to flow out; wherein at least the lower end of the outlet pipe extends to the lower part of the boundary line of the constant-temperature zone.
Preferably the inlet chamber is spaced from the fan-shaped chamber with the filler material; the bottoms of the inlet cavity and the inner column cavity are provided with concrete back covers; the bottom ends of the outer pile cylinder, the inner pile cylinder and the connecting wall are provided with bottom ends with gradually reduced wall thickness; the concrete bottom cover is positioned above the bottom end.
Preferably, the bottom of the inner column cavity is positioned on the upper surface of the concrete back cover, and a distributor is arranged. The distributor allows selective communication of fluid paths between one or more of the plurality of inlet chambers and the inner column chamber, thereby enabling regulation of the heat transfer power of the PCC energy column.
The distributor comprises a cylinder, the outer surface of the cylinder is in a cylindrical shape matched with the inner surface of the inner column cavity, the inner surface of the cylinder is in an inverted cone/inverted frustum shape, the cross section area of the inverted cone/inverted frustum shape is gradually increased from bottom to top, and a plurality of sealing plates are arranged in the cylinder at intervals from top to bottom so as to divide the inner cavity of the cylinder into a plurality of sub-cavities which are vertically arranged; the side wall of the cylinder is provided with a through hole corresponding to each sub-cavity; the through holes are circumferentially arranged on the side wall of the cylinder body and are respectively and correspondingly communicated with the connecting channels arranged at different heights at the bottoms of the inlet cavities, so that heat exchange fluids in different inlet cavities are introduced into different sub-cavities of the cylinder body.
The density of the closing plate is slightly greater than that of the heat exchange fluid, so that the closing plate cannot float in the cylinder body due to the buoyancy of the static heat exchange fluid, but simultaneously the closing plate can be pushed open by virtue of a flushing effect when the heat exchange fluid flows upwards at a certain speed, so that an annular gap channel formed between the periphery of the closing plate and the inner wall of the cylinder body is opened.
Preferably, the distributor comprises at least one positioning rod penetrating through the plurality of closing plates and fixed at the bottom of the concrete bottom plate or the barrel, a limiting block is fixedly arranged at the top of the positioning rod, and the positioning rod and the limiting block are used for guiding the sliding of the edge sealing plate and limiting the moving space of the edge sealing plate.
During operation, in the PCC energy pile, the filling heights of the heat exchange fluid in the inlet cavity and the inner column cavity are both below the boundary line of the constant temperature zone, so that the interference of the temperature-changing zone stratum is reduced, and the using amount of the heat exchange fluid is reduced. A fluid pump arranged on the ground surface conveys heat exchange fluid to be exchanged into the inlet cavity through an inlet pipe, and exchanges heat with a constant temperature zone stratum outside the outer pile barrel in the inlet cavity; meanwhile, the fluid pump sucks heat exchange fluid after heat exchange from the inner column cavity through an outlet pipe which extends to the lower part of the boundary of the constant temperature zone and the lower end of which is submerged by the heat exchange fluid in the inner column cavity; the inlet chamber and the heat exchange fluid in the inner column chamber generate a liquid level difference, and the liquid level difference promotes the heat exchange fluid in the inlet chamber to enter the inner column chamber from the connecting channel at the bottom.
When the heat exchange demand is small in spring or autumn, a valve is adjusted, heat exchange fluid is conveyed into an inlet cavity communicated with the sub-cavity at the upper part of the cylinder, at the moment, the liquid level in the inlet cavity rises, a liquid level difference enough for jacking a sealing plate at the upper part of the corresponding sub-cavity is generated between the inlet cavity and the inner column cavity, and the heat exchange fluid enters the inner column cavity from the inlet cavity; and the other hot oral cavities can not generate a liquid level difference for pushing the footprints between the other hot oral cavities and the inner column cavity to open the sealing plate at the upper part of the corresponding sub-cavity because the heat exchange fluid channel between the other hot oral cavities and the inner column cavity is blocked. Part of the heat exchange capacity of the PCC energy column is activated.
When the heat exchange demand is increased in summer or winter, the valve is adjusted to convey heat exchange fluid to all the inlet cavities, at the moment, a liquid level difference which is enough to jack the closing plate at the upper part of the corresponding sub-cavity is generated between all the inlet cavities and the inner column cavity, and the heat exchange fluid in all the inlet cavities can enter the inner column cavity from the connecting channel at the bottom and the through hole corresponding to the connecting channel. The entire heat exchange capacity of the PCC energy column is activated.
Preferably, a cover plate is arranged at the top of the PCC energy pile.
The invention also provides a pile mould for manufacturing the variable-power PCC energy pile, which comprises an outer mould wall for limiting the outer wall of an outer pile cylinder; an outer arc plate for limiting the inner wall of the outer pile casing; the inner arc plate is used for limiting the outer wall of the inner pile barrel; the inner mould wall is used for limiting the inner wall of the inner pile barrel, the side edges of the corresponding outer arc plate and the inner arc plate are connected, and the wing plate is used for limiting the connecting wall; the outer die wall, the outer arc plate, the wing plate, the inner arc plate and the inner die wall enclose a die cavity with a steering wheel-shaped section, and the top ends of the plates are flush; the bottom end of one of the inner mould wall, the outer mould wall and one of the two wing plates limiting the same connecting wall is higher than the bottom ends of other plates of the pile mould, and a rotatable inclined plate is hinged to the inner mould wall, the outer mould wall and the other wing plates through a hinge element; the other end of the inclined plate is temporarily fixed on the plate at the opposite side (such as an inner arc plate, an outer arc plate and a wing plate of the non-hinged inclined plate) by means of an openable component, so as to be used for limiting the bottom end of the PCC energy pile.
The bottom in an annular cavity formed by the inner arc plate and the inner mold wall and used for limiting the inner pile cylinder is also provided with a plurality of indwelling pipes used for forming a connecting channel in a clamping manner; the plurality of indwelling pipes are respectively clamped at different heights, so that the prepared connecting channel can be correspondingly connected with the through holes on different sub-cavities of the cylinder body of the distributor.
Preferably, the pile mould further comprises a support frame (not shown) which can be placed in the mould cavity of the pile mould before piling and removed from the top of the pile mould after piling.
When in use, under the condition that the inclined plate is opened, the indwelling pipe is clamped or fixed at a specified position between the inner arc plate and the inner mold wall by means of adhesive; then temporarily fixing the inclined plate on the opposite side; placing the support frame into the mold cavity from the opening at the top of the pile mold, and fixing the support frame properly; transporting the pile mould to a prepared pile sinking site, and sinking the pile mould into the ground by a preset depth by means of pile sinking equipment; taking out the support frame from the bottom of the pile mould; placing the reinforcement cage into a pile mould, and then pouring concrete; the pile mould is pulled out by means of a vibrating device, at the moment, an inclined plate at the bottom of the pile mould is opened under the pressure of concrete, and meanwhile, the remaining pipe is separated from the pulled-out pile mould due to the pressure of the concrete, so that a connecting channel which is not filled with the concrete is formed.
Compared with the prior art, the invention at least has the following beneficial effects: the PCC energy pile of the invention has separated cold and hot fluid channels, thus having higher heat exchange efficiency compared with the traditional PCC energy pile which adopts a cold and hot convection mode to exchange heat; meanwhile, the partition part for partitioning the cold and hot fluid channels can strengthen the structural strength of the PCC energy pile, so that the pile wall thickness is allowed to be smaller than that of the traditional PCC energy pile, and the heat exchange efficiency is further improved; the PCC energy pile of the invention also allows the selection of heat exchange power, and can meet the variability requirement of heat exchange quantity in different seasons.
Drawings
Fig. 1 is a top view of a PCC energy pile (without filler material);
fig. 2 is a top view of a PCC energy pile (with filler material);
fig. 3 is a longitudinal cross-sectional view of a PCC energy pile;
FIG. 4 is an enlarged view of a portion of the dispenser;
FIG. 5 is a schematic view of the flow of the uppermost subchamber in communication with the inlet chamber;
FIG. 6 is a schematic flow diagram of the upper two subchambers communicating with a human mouth;
FIG. 7 is a schematic flow diagram of the upper three subchambers communicating with the inlet chamber;
FIG. 8 is a schematic flow diagram of the four sub-cavities junyu communicating with the oral cavity;
FIG. 9 is a bottom schematic view of the pile mold;
FIG. 10 is a schematic cross-sectional view of a pile mold (no indwelling tube);
FIG. 11 is a longitudinal sectional view showing the setting position of an indwelling tube;
FIG. 12 is a cross sectional view showing the installation position of an indwelling tube.
In the figure: the pile comprises an outer pile tube 1, an inner pile tube 2, a connecting wall 3, an inlet cavity 4, an inner pile cavity 5, a filling material 6, a concrete back cover 7, a bottom end 8, a cover plate 9, an outlet tube 10, an inlet tube 11, a header tube 12, a valve 13, a connecting channel 14, a barrel body 15, a through hole 16, a closing plate 17, a positioning rod 18, a limiting block 19, a flowing heat exchange fluid 20, an outer mold wall 21, an outer arc plate 22, an wing plate 23, an inner arc plate 24, an inner mold wall 25, an inclined plate 26, a hinge element 27 and a retaining tube 28.
Detailed Description
Example 1
A PCC energy pile with variable power comprises a pile body, wherein the pile body comprises an outer pile cylinder 1 and an inner pile cylinder 2 which are arranged concentrically, and further comprises a connecting wall 3 connected between the outer pile cylinder 1 and the inner pile cylinder 2, the connecting wall 3 extends from the outer surface of the inner pile cylinder 2 to the inner wall of the outer pile cylinder 1 in a radiating manner, so that an interlayer between the outer pile cylinder 1 and the inner pile cylinder 2 is divided into a plurality of fan-shaped cavities; the inner wall of the inner pile barrel 2 encloses an inner pile cavity 5; at least one of the several sector-shaped cavities does not comprise a filler material 6 and is used for receiving a heat exchange fluid from a ground heat pump machine room, thereby forming an inlet cavity 4 of the PCC energy pile; an inlet pipe 11 for introducing heat exchange fluid is arranged at the top of the inlet cavity 4, and the inlet pipe 11 is connected to a main pipe 12 through a valve 13; the bottom of the inlet cavity 4 is provided with a connecting channel 14 communicated with the inner column cavity 5; the top of the inner column cavity 5 is provided with an outlet pipe 10 for heat exchange fluid to flow out; wherein at least the lower end of said outlet pipe 10 extends to the lower part of the boundary line of the thermostatic zone.
Preferably, the inlet chamber 4 is arranged at a distance from the sector chamber with the filling material 6; the bottoms of the inlet cavity 4 and the inner column cavity 5 are provided with concrete back covers 7; the bottom ends of the outer pile cylinder 1, the inner pile cylinder 2 and the connecting wall 3 are provided with bottom ends 8 with gradually reduced wall thickness; the concrete back cover 7 is located above the bottom end 8.
Preferably, the bottom of the inner column cavity 5 is positioned on the upper surface of the concrete back cover 7 and is provided with a distributor. The distributor allows selective access to the fluid path between one or more of the inlet chambers 4 and the inner column chamber 5, thereby enabling regulation of the heat transfer power of the PCC energy pile.
The distributor comprises a cylinder body 15, the outer surface of the cylinder body 15 is in a cylindrical shape matched with the inner surface of the inner column cavity 5, the inner surface of the cylinder body 15 is in a shape of an inverted cone/inverted frustum with the cross section area gradually increasing from bottom to top, and a plurality of sealing plates 17 are arranged in the cylinder body 15 at intervals from top to bottom so as to divide the inner cavity of the cylinder body 15 into a plurality of sub-cavities which are vertically arranged; wherein, a through hole 16 is arranged on the side wall of the cylinder body 15 corresponding to each sub-cavity; the plurality of through holes 16 are circumferentially arranged on the side wall of the cylinder 15 and respectively and correspondingly communicated with the plurality of connecting channels 14 arranged at different heights at the bottoms of the inlet chambers 4, so as to be used for introducing the heat exchange fluid in different inlet chambers 4 into different sub-chambers of the cylinder 15.
The density of the closing plate 17 is slightly greater than that of the heat exchange fluid, so that it does not float in the cylinder 15 due to the buoyancy of the static heat exchange fluid, but at the same time allows the heat exchange fluid to flow upward at a certain speed, so that it can be pushed open by means of a flushing action, and the annular gap passage formed between its periphery and the inner wall of the cylinder 15 is opened.
Preferably, the distributor comprises at least one positioning rod 18 which penetrates through the plurality of closing plates 8 and is fixed at the bottom of the concrete back cover 7 or the barrel 15, a limiting block 19 is fixedly arranged at the top of the positioning rod 18, and the positioning rod 18 and the limiting block 19 are used for guiding the sliding of the edge sealing plates 8 and limiting the moving space of the edge sealing plates.
Preferably, the top of the PCC energy pile is provided with a cover plate 9.
Example 2
The invention also provides a pile mould for manufacturing the variable power PCC energy pile, which comprises an outer mould wall 21 for limiting the outer wall of the outer pile casing 1; an outer arc plate 22 for limiting the inner wall of the outer pile casing 1; an inner arc plate 24 for limiting the outer wall of the inner pile casing 2; an inner mold wall 25 for limiting the inner wall of the inner pile casing 2, and a wing plate 23 for connecting the corresponding outer arc plate 22 and the inner arc plate 24 and limiting the connecting wall 3; the outer die wall 21, the outer arc plate 22, the wing plate 23, the inner arc plate 24 and the inner die wall 25 enclose a die cavity with a steering wheel-shaped section, and the top ends of the plates are flush; the bottom end of one of the inner mould wall 25, the outer mould wall 21 and the two wing plates 23 limiting the same connecting wall 3 is higher than the bottom end of the other plates of the pile mould, and a rotatable inclined plate 26 is hinged through a hinge element 27; the other end of the sloping plate 26 is temporarily fixed to the opposite plate (such as the inner arc plate 24, the outer arc plate 22 and the wing plate 23 of the non-hinged sloping plate 26) by means of an openable member, thereby being used for restraining the bottom end 8 of the PCC energy pile.
A plurality of indwelling pipes 28 for forming the connecting channel 14 are also clamped at the bottom in an annular cavity formed by the inner arc plate 24 and the inner mould wall 25 and used for limiting the inner pile cylinder 2; several of said indwelling tubes 28 are respectively blocked at different heights so that said connecting channel 14 can be made to correspond to the through holes 16 on different subcavities of the barrel 15 of the dispenser.
Preferably, the pile mould further comprises a support frame (not shown) which can be placed in the mould cavity of the pile mould before piling and removed from the top of the pile mould after piling.
The above examples are only examples of preferred embodiments of the concept according to the present invention, which should not be construed as limiting all possible embodiments of the present invention, and embodiments obtained by a person of ordinary skill in the art through substitution of conventional means without inventive efforts also belong to the possible scope of implementation of the present invention, and the actual protection scope of the present invention is subject to the limitation of the claims.
Claims (8)
1. A PCC energy pile of variable power, includes pile body, its characterized in that: the pile body comprises an outer pile cylinder (1) and an inner pile cylinder (2) which are concentrically arranged, and further comprises a connecting wall (3) for connecting the outer pile cylinder (1) and the inner pile cylinder (2), wherein the interlayer between the outer pile cylinder (1) and the inner pile cylinder (2) is divided into a plurality of sector-shaped cavities by the connecting wall (3); the inner wall of the inner pile cylinder (2) encloses an inner pile cavity (5); at least one of said several sector-shaped cavities does not comprise a filler material (6) and is used for an inlet cavity (4) receiving a heat exchange fluid from a ground heat pump room; the top of the inlet cavity (4) is provided with an inlet pipe (11) for introducing heat exchange fluid, and the inlet pipe (11) is connected to a main pipe (12) through a valve (13); the bottom of the inlet cavity (4) is provided with a connecting channel (14) communicated with the inner column cavity (5); the top of the inner column cavity (5) is provided with an outlet pipe (10) for heat exchange fluid to flow out; wherein the lower end of the outlet pipe (10) extends to the lower part of the boundary of the constant temperature zone; the bottoms of the inlet cavity (4) and the inner column cavity (5) are provided with concrete back covers (7); the bottom of the inner column cavity (5) is positioned on the upper surface of the concrete back cover (7) and is provided with a distributor; the distributor allows selective access to a fluid path between one or more of the inlet chambers (4) and the inner column chamber (5) to enable regulation of the heat exchange power of the PCC energy pile; the distributor comprises a cylinder body (15), the outer surface of the cylinder body (15) is in a cylindrical shape matched with the inner surface of the inner column cavity (5), the inner surface of the cylinder body is in an inverted cone/inverted frustum shape, the cross section area of the inner surface of the cylinder body is gradually increased from bottom to top, and the inside of the cylinder body (15) is divided into a plurality of sub cavities which are vertically arranged by a plurality of sealing plates (17) which are arranged from top to bottom at intervals; a through hole (16) is formed in the side wall of the cylinder (15) corresponding to each sub-cavity; the through holes (16) are circumferentially arranged on the side wall of the cylinder (15) and respectively and correspondingly communicated with the connecting channels (14) which are arranged at different heights and are arranged at the bottoms of the inlet cavities (4).
2. The variable power PCC energy pile of claim 1, wherein: the inlet chamber (4) is arranged at a distance from the sector chamber with the filling material (6); the bottom ends of the outer pile cylinder (1), the inner pile cylinder (2) and the connecting wall (3) are provided with bottom ends (8) with gradually reduced wall thickness; the concrete back cover (7) is positioned above the bottom end (8).
3. The variable power PCC energy pile of claim 1, wherein: the density of the closing plate (17) is slightly higher than that of the heat exchange fluid, so that the closing plate can not float in the cylinder (15) due to the buoyancy of the static heat exchange fluid, but can be pushed open by virtue of a flushing effect when the heat exchange fluid is allowed to flow upwards at a certain speed.
4. The variable power PCC energy pile of claim 3, wherein: the distributor comprises at least one positioning rod (18) which penetrates through the plurality of closing plates (17) and is fixed to the bottom of the concrete back cover (7) or the barrel (15), and the top of the positioning rod (18) is fixedly provided with a limiting block (19).
5. The variable power PCC energy pile of claim 1, wherein: and a cover plate (9) is arranged at the top of the PCC energy pile.
6. Pile form for making a variable power PCC energy pile according to any one of claims 1-5, characterised in that: the pile mould comprises an outer mould wall (21) for confining the outer wall of the outer pile cylinder (1); an outer arc plate (22) for limiting the inner wall of the outer pile casing (1); an inner arc plate (24) for limiting the outer wall of the inner pile casing (2); an inner mould wall (25) for limiting the inner wall of the inner pile casing (2), and a wing plate (23) for connecting the corresponding outer arc plate (22) and the side edge of the inner arc plate (24) and limiting the connecting wall (3); the outer die wall (21), the outer arc plate (22), the wing plate (23), the inner arc plate (24) and the inner die wall (25) are enclosed to form a die cavity with a rudder-shaped section; the bottom of an annular cavity formed by the inner arc plate (24) and the inner mould wall (25) and used for limiting the inner pile cylinder (2) is also provided with a plurality of indwelling pipes (28) used for forming the connecting channel (14); the plurality of indwelling pipes (28) are respectively arranged at different heights.
7. The pile mould of claim 6, wherein: the top ends of all the plates of the pile mould are flush; the bottom end of one of the inner mold wall (25), the outer mold wall (21) and two wing plates (23) limiting the same connecting wall (3) is higher than the bottom ends of other plates of the pile mold, and a rotatable inclined plate (26) is hinged through a hinge element (27); the other end of the sloping plate (26) is temporarily fixed to the opposite side plate by means of an openable member, thereby serving to restrain the bottom end (8) of the PCC energy pile.
8. The pile mold of claim 7, wherein: the pile mould also comprises a support frame which can be placed in the mould cavity of the pile mould before piling and taken out from the top of the pile mould after piling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010319762.3A CN111441344B (en) | 2020-04-22 | 2020-04-22 | PCC energy pile of variable power and stake mould thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010319762.3A CN111441344B (en) | 2020-04-22 | 2020-04-22 | PCC energy pile of variable power and stake mould thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111441344A CN111441344A (en) | 2020-07-24 |
| CN111441344B true CN111441344B (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010319762.3A Active CN111441344B (en) | 2020-04-22 | 2020-04-22 | PCC energy pile of variable power and stake mould thereof |
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|---|---|
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Citations (5)
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| CN109163478A (en) * | 2018-09-04 | 2019-01-08 | 深圳大学 | A kind of phase transformation energy pile, earth source heat pump heat-exchange system and production method |
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| US11796225B2 (en) * | 2012-10-18 | 2023-10-24 | American Piledriving Equipment, Inc. | Geoexchange systems including ground source heat exchangers and related methods |
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| CN102587365A (en) * | 2012-03-02 | 2012-07-18 | 中国京冶工程技术有限公司 | Precession-type backfill grouting ground source thermal energy conversion precast pile device and method for embedding precast pile device into stratum |
| JP2016223270A (en) * | 2015-05-27 | 2016-12-28 | 理研興業株式会社 | Geothermal heat collection device |
| CN108775010A (en) * | 2018-05-29 | 2018-11-09 | 河海大学 | A kind of PCC energy stake and its construction method |
| CN109163478A (en) * | 2018-09-04 | 2019-01-08 | 深圳大学 | A kind of phase transformation energy pile, earth source heat pump heat-exchange system and production method |
| CN109098173A (en) * | 2018-09-28 | 2018-12-28 | 浙江工业大学 | A kind of prefabricated energy pile concrete tubular pile |
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