Energy pile group device applied to soft soil condition

Abstract

The utility model relates to an energy pile group device applied to a soft soil condition, and belongs to the technical field of ground source heat pumps. The device is composed of a pile body, a water inlet pipe, a water outlet pipe, a connecting pipe, a supporting plate, a rib plate and a bottom connecting piece. On the basis of enhancing heat exchange, the side friction resistance is further utilized to disperse pressure borne by the pile body; meanwhile, the problem of thermal short circuit in a traditional U-shaped heat exchange tube can be solved; and the space in the supporting plate can be effectively utilized, and the effect of increasing the heat exchange area can be achieved while all the pipes are connected.

Description

Technical Field

[0001] The utility model relates to the technical field of energy piles of a ground source heat pump system, in particular to an energy pile group device applied to soft soil conditions. Background Art

[0002] Building pile foundations are usually used to bear building loads, while energy piles combine traditional buried pipe heat exchangers with building pile foundations. While the pile foundations bear the building loads, the effective space in the pile foundations is used to bury the heat exchanger, thereby extracting the cold and heat of the underground soil to provide cooling and heating for the building. This not only reduces the cost of drilling individual buried pipes, but also solves the problem of large space occupied by buried pipe heat exchangers, and has good economic benefits.

[0003] However, since the energy pile is buried underground as the pile foundation of the building, and in special soils such as soft soil or desert areas as the pile foundation to bear the building load, the friction resistance between the pile and the soil and the bottom support force are both small, and there may be a problem of pile foundation sinking. The thermal expansion and contraction caused by the heat exchange process of the energy pile will aggravate this sinking problem, which will reduce the bearing capacity of the pile foundation and increase the engineering risks of the pile foundation. At the same time, as a device that takes into account both load bearing and heat exchange, the water inlet and outlet pipes of the buried heat exchanger are usually placed in the limited space inside the pile, which will cause thermal interference between the inlet and outlet pipes. In addition, due to the limitation of space, the energy pile fails to make the maximum use of the heat exchange space of the underground soil, which will also lead to unsatisfactory heat exchange effect.

[0004] Therefore, it is necessary to design an energy pile group device that can not only increase the underground buried pipe heat exchange space of the heat pump system while taking into account the stability of the energy pile foundation, but also solve the thermal short circuit problem of the traditional buried pipe heat exchanger. Summary of the invention

[0005] The purpose of the utility model is to overcome the above-mentioned shortcomings and defects and to provide an energy pile group device for use in soft soil conditions to solve the problem of energy pile sinking under special geological conditions, alleviate thermal interference, and increase the heat exchange space of underground buried pipes.

[0006] Technical solution: The utility model provides an energy pile group device for use in soft soil conditions, comprising:

[0007] Pile body 1, water inlet pipe 2, support plate 3, fin plate 4, connecting pipe 5, bottom connecting piece 6 and water outlet pipe 7;

[0008] A water inlet pipe 2 is provided inside the pile body 1, the connecting pipe 5 is buried inside the support plate 3, the inlet of the water inlet pipe 2 is connected to the outlet of the condenser or evaporator in the heat pump system, the outlet of the water outlet pipe 7 is connected to the inlet of the condenser or evaporator in the heat pump system, the fin plates 4 are evenly arranged on the lower surface of the support plate 3, the pile bodies 1 are evenly arranged on the upper surface of the support plate 3, and the shape of the support plate 3 is determined according to the excavation range of the pile group arrangement area.

[0009] Furthermore, the pile body 1 includes: a first pile body 1-1, a second pile body 1-2, a third pile body 1-3, a fourth pile body 1-4, a fifth pile body 1-5, a sixth pile body 1-6 and a seventh pile body 1-7; the first pile body 1-1, the second pile body 1-2, the third pile body 1-3, the fourth pile body 1-4, the fifth pile body 1-5 and the sixth pile body 1-6 are centrally symmetrical with the seventh pile body 1-7 as the center, the seventh pile body 1-7 is placed at the center of the upper surface of the support plate 3, and the seventh pile body 1-7 is provided with a water outlet pipe 7.

[0010] Furthermore, the water inlet pipe 2 includes: a first water inlet pipe 2-1, a second water inlet pipe 2-2, a third water inlet pipe 2-3, a fourth water inlet pipe 2-4, a fifth water inlet pipe 2-5 and a sixth water inlet pipe 2-6, and the water inlet pipe 2 is connected to the connecting pipe 5.

[0011] Furthermore, the connecting pipe 5 includes: a first connecting pipe 5 - 1 , a second connecting pipe 5 - 2 , a third connecting pipe 5 - 3 , a fourth connecting pipe 5 - 4 , a fifth connecting pipe 5 - 5 and a sixth connecting pipe 5 - 6 , and the connecting pipe 5 is connected to the bottom connecting piece 6 .

[0012] Furthermore, the water inlet pipe 2 and the water outlet pipe 7 include any heat exchanger form that is easy to construct and can improve heat exchange performance; the number of the fin plates 4 is set according to the specific shape of the support plate 3.

[0013] Furthermore, the bottom connector 6 includes a bottom connector main pipe 6-7, a first branch pipe 6-1, a second branch pipe 6-2, a third branch pipe 6-3, a fourth branch pipe 6-4, a fifth branch pipe 6-5 and a sixth branch pipe 6-6; the water outlet pipe 7 is connected to the bottom connector main pipe 6-7.

[0014] Furthermore, the pile body 1 is made of steel fiber concrete pile body; the water inlet pipe 2 and the water outlet pipe 7 are made of PE pipe; the support plate 3 and the fin plate 4 are made of reinforced concrete casting; and the bottom connector 6 is made of PE material.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The combination of pile body and support plate can alleviate the sinking problem of energy piles in special soil geological conditions;

[0017] 2. Install fin plates under the bottom support plate to further disperse the pressure on the pile body through side friction resistance on the basis of strengthening heat exchange, so as to alleviate the sinking problem of the energy pile;

[0018] 3. By setting up separate inlet and outlet water pipes, the thermal short circuit problem between the inlet and outlet water pipes can be reduced, and the underground space can be effectively used to add connecting pipes to increase the heat exchange area and improve the heat exchange performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0020] Figure 1 This is a schematic diagram of the structure of an energy pile group device suitable for soft soil conditions provided by this embodiment;

[0021] Figure 2 is a schematic structural diagram of the bottom connecting member provided in this embodiment;

[0022] In the figure: 1-1: the first pile body; 1-2: the second pile body; 1-3: the third pile body; 1-4: the fourth pile body; 1-5: the fifth pile body; 1-6: the sixth pile body; 1-7: the seventh pile body; 2-1: the first water inlet pipe; 2-2: the second water inlet pipe; 2-3: the third water inlet pipe; 2-4: the fourth water inlet pipe; 2-5: the fifth water inlet pipe; 2-6: the sixth water inlet pipe; 3: the support plate; 4: the fin plate; 5-1: the first connecting pipe; 5-2: the second connecting pipe; 5-3: the third connecting pipe; 5-4: the fourth connecting pipe; 5-5: the fifth connecting pipe; 5-6: the sixth connecting pipe; 6: the bottom connecting piece; 6-7: the bottom main pipe; 6-1: the first branch pipe; 6-2: the second branch pipe; 6-3: the third branch pipe; 6-4: the fourth branch pipe; 6-5: the fifth branch pipe; 6-6: the sixth branch pipe; 7: the outlet pipe. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] It should be noted here that in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0025] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0026] The implementation modes of the utility model are further described in detail below in conjunction with the accompanying drawings.

[0027] like Figure 1 As shown, an energy pile group device applied to soft soil conditions comprises:

[0028] Pile body 1, water inlet pipe 2, support plate 3, fin plate 4, connecting pipe 5, bottom connecting piece 6 and water outlet pipe 7;

[0029] A water inlet pipe 2 is provided inside the pile body 1, the connecting pipe 5 is buried inside the support plate 3, the inlet of the water inlet pipe 2 is connected to the outlet of the condenser or evaporator in the heat pump system, the outlet of the water outlet pipe 7 is connected to the inlet of the condenser or evaporator in the heat pump system, the fin plates 4 are evenly arranged on the lower surface of the support plate 3, the pile bodies 1 are evenly arranged on the upper surface of the support plate 3, and the shape of the support plate 3 is determined according to the excavation range of the pile group arrangement area.

[0030] The pile body 1 includes: a first pile body 1-1, a second pile body 1-2, a third pile body 1-3, a fourth pile body 1-4, a fifth pile body 1-5, a sixth pile body 1-6 and a seventh pile body 1-7; the first pile body 1-1, the second pile body 1-2, the third pile body 1-3, the fourth pile body 1-4, the fifth pile body 1-5 and the sixth pile body 1-6 are centrally symmetrical with the seventh pile body 1-7 as the center, the seventh pile body 1-7 is placed at the center of the upper surface of the support plate 3, and a water outlet pipe 7 is provided in the seventh pile body 1-7.

[0031] The water inlet pipe 2 includes: a first water inlet pipe 2-1, a second water inlet pipe 2-2, a third water inlet pipe 2-3, a fourth water inlet pipe 2-4, a fifth water inlet pipe 2-5 and a sixth water inlet pipe 2-6, and the water inlet pipe 2 is connected to the connecting pipe 5.

[0032] The connecting pipe 5 includes: a first connecting pipe 5 - 1 , a second connecting pipe 5 - 2 , a third connecting pipe 5 - 3 , a fourth connecting pipe 5 - 4 , a fifth connecting pipe 5 - 5 and a sixth connecting pipe 5 - 6 , and the connecting pipe 5 is connected to a bottom connecting piece 6 .

[0033] The water inlet pipe 2 and the water outlet pipe 7 include any heat exchanger form that is easy to construct and can improve heat exchange performance; the number of the fin plates 4 is set according to the specific shape of the support plate 3.

[0034] like Figure 2As shown, the bottom connector 6 includes a bottom connector main pipe 6-7, a first branch pipe 6-1, a second branch pipe 6-2, a third branch pipe 6-3, a fourth branch pipe 6-4, a fifth branch pipe 6-5 and a sixth branch pipe 6-6; the water outlet pipe 7 is connected to the bottom connector main pipe 6-7.

[0035] Furthermore, the pile body 1 is made of steel fiber concrete pile body; the water inlet pipe 2 and the water outlet pipe 7 are made of PE pipe; the support plate 3 and the fin plate 4 are made of reinforced concrete casting; and the bottom connector 6 is made of PE material.

[0036] The pile group device is constructed according to the following steps:

[0037] Survey the geological conditions of the construction area and determine the excavation scope and depth of each pile group layout area;

[0038] Determine the shape of the support plate according to the specific excavation range of different pile group arrangement areas and cast it on site;

[0039] The connecting pipes are laid inside the supporting plate in a suitable arrangement;

[0040] The fin plates are buried in the soil in a suitable arrangement, and after the support plate is cast, it is placed on top of the fin plates, and the two are bonded with a material with strong adhesion and thermal conductivity;

[0041] The water inlet pipe and the water outlet pipe are connected to the corresponding connecting pipe inlet and outlet by hot melting;

[0042] The pile body is sleeved outside the water inlet pipe and the water outlet pipe, and is cast with the support plate through reinforced concrete.

[0043] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. An energy pile group device used in soft soil conditions, characterized in that: include: A pile body (1), a water inlet pipe (2), a support plate (3), a fin plate (4), a connecting pipe (5), a bottom connecting piece (6) and a water outlet pipe (7); A water inlet pipe (2) is arranged inside the pile body (1), the connecting pipe (5) is buried inside the support plate (3), the inlet of the water inlet pipe (2) is connected to the outlet of a condenser or an evaporator in the heat pump system, the outlet of the water outlet pipe (7) is connected to the inlet of a condenser or an evaporator in the heat pump system, the fin plates (4) are evenly arranged on the lower surface of the support plate (3), the pile bodies (1) are evenly arranged on the upper surface of the support plate (3), and the shape of the support plate (3) is determined according to the excavation range of the pile group arrangement area.

2. The energy pile group device for use in soft soil conditions according to claim 1, characterized in that: The pile body (1) comprises: a first pile body (1-1), a second pile body (1-2), a third pile body (1-3), a fourth pile body (1-4), a fifth pile body (1-5), a sixth pile body (1-6) and a seventh pile body (1-7); the first pile body (1-1), the second pile body (1-2), the third pile body (1-3), the fourth pile body (1-4), the fifth pile body (1-5) and the sixth pile body (1-6) are centrally symmetrical with the seventh pile body (1-7) as the center; the seventh pile body (1-7) is placed at the center of the upper surface of the support plate (3); and a water outlet pipe (7) is provided in the seventh pile body (1-7).

3. The energy pile group device for use in soft soil conditions according to claim 1, characterized in that: The water inlet pipe (2) comprises: a first water inlet pipe (2-1), a second water inlet pipe (2-2), a third water inlet pipe (2-3), a fourth water inlet pipe (2-4), a fifth water inlet pipe (2-5) and a sixth water inlet pipe (2-6); the water inlet pipe (2) is connected to a connecting pipe (5).

4. The energy pile group device for use in soft soil conditions according to claim 1, characterized in that: The connecting pipe (5) comprises: a first connecting pipe (5-1), a second connecting pipe (5-2), a third connecting pipe (5-3), a fourth connecting pipe (5-4), a fifth connecting pipe (5-5) and a sixth connecting pipe (5-6); the connecting pipe (5) is connected to a bottom connecting piece (6).

5. The energy pile group device for use in soft soil conditions according to claim 1, characterized in that: The water inlet pipe (2) and the water outlet pipe (7) include any heat exchanger form that is easy to construct and can improve heat exchange performance; the number of the fin plates (4) is set according to the specific shape of the support plate (3).

6. The energy pile group device for use in soft soil conditions according to claim 1, characterized in that: The bottom connecting piece (6) comprises a bottom connecting piece main pipe (6-7), a first branch pipe (6-1), a second branch pipe (6-2), a third branch pipe (6-3), a fourth branch pipe (6-4), a fifth branch pipe (6-5) and a sixth branch pipe (6-6); the water outlet pipe (7) is connected to the bottom connecting piece main pipe (6-7).

7. The energy pile group device for use in soft soil conditions according to claim 1, characterized in that: The pile body (1) is made of a steel fiber concrete pile body; the water inlet pipe (2) and the water outlet pipe (7) are made of a PE pipe; the support plate (3) and the fin plate (4) are made of reinforced concrete casting; and the bottom connecting piece (6) is made of a PE material.

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