CN220818116U - Vertical buried pipe for under-pressure pipe of earth surface drilling type deep foundation pit ground source heat pump system - Google Patents

Abstract

The utility model relates to a vertical buried pipe for a ground surface drilling type deep foundation pit ground source heat pump system under-pressure pipe, which comprises four vertical heat exchange pipes, a pressure injection joint pipe, a single U joint, a long double U joint and a pipe cap, wherein the four vertical heat exchange pipes are vertically arranged, the upper ends of the two vertical heat exchange pipes are in sealing connection and communication through the single U joint, the pressure injection joint pipe is vertically arranged, the lower ends of the two vertical heat exchange pipes are in sealing connection and communication with the upper end of the other vertical heat exchange pipe, the upper ends of the other vertical heat exchange pipes are in sealing installation with the pipe cap, and the long double U joint is connected and communicated with the lower ends of the four vertical heat exchange pipes. The advantages are that: can realize pressing down the pipe in the area, long two U joints possess bigger sand soil impurity deposit space, can prolong deposition time, reduce the pipeline and block up the risk, simultaneously, construction pipe laying process is only a "useless pipe", has reduced tubular product loss, does not influence the earth and has excavated the degree of difficulty and excavation cost.

Description

Vertical buried pipe for under-pressure pipe of earth surface drilling type deep foundation pit ground source heat pump system

Technical Field

The utility model relates to the technical field of ground source heat pumps, in particular to a vertical buried pipe for a ground source heat pump system under-pressure pipe of a deep foundation pit of surface drilling.

Background

In the vertical buried pipe construction process, the total length of the vertical buried pipe is the total depth from the ground surface to the bottom of the effective heat exchange depth section, wherein the pipe between the depth section of the foundation pit and the lower bottom of the valve plate foundation is an invalid pipe which needs to be cut off in layers along with earth excavation in deep foundation pit engineering construction, so that the actual utilization rate of the pipe is low, and resource waste exists; in addition, the engineering quantity related to the pulling of the excavator in the earthwork excavation construction is large, the existence of the vertical buried pipe in the construction area inevitably causes interference to the earthwork excavation construction, besides the engineering progress can be influenced, the problem that the vertical buried pipe is damaged and broken due to the collision of construction machinery is extremely easy to occur, the integrity of the useful pipe in the heat exchange section can be influenced when serious, the engineering reworking is caused, the construction efficiency is influenced, and the construction cost is increased. In addition, the vertical pipe pressing process generally has the defects of unreasonable method, low construction efficiency, low material effective utilization, high loss and the like.

Disclosure of utility model

The utility model aims to solve the technical problem of providing a vertical buried pipe for a ground source heat pump system under pressure pipe of a deep foundation pit of surface drilling, which effectively overcomes the defects of the prior art.

The technical scheme for solving the technical problems is as follows:

The utility model provides a vertical buried pipe for ground surface drilling type deep foundation pit ground source heat pump system under pressure pipe, includes four vertical heat exchange tubes, annotates the pressure bearing pipe, single U connects, long two U connects and pipe cap, four above-mentioned vertical heat exchange tubes vertical setting, wherein the upper end of two above-mentioned vertical heat exchange tubes passes through above-mentioned single U connects sealing connection and communicates, the vertical setting of above-mentioned annotates the pressure bearing pipe, its lower extreme and the upper end sealing connection and the intercommunication of another above-mentioned vertical heat exchange tube, the upper end sealing mounting of the above-mentioned pipe cap of the above-mentioned vertical heat exchange tube of the remaining one, the lower extreme connection and the intercommunication of above-mentioned long two U connects and four above-mentioned vertical heat exchange tubes.

On the basis of the technical scheme, the utility model can be improved as follows.

Further, the single-U joint comprises a first U-shaped pipe, two ends of the first U-shaped pipe are respectively provided with a plug pipe section, and the plug pipe sections at two ends of the first U-shaped pipe are respectively plugged and sealed with the upper ends of two of the vertical heat exchange pipes.

Further, the long double-U joint comprises a first pipe cavity and four first connecting pipes, wherein the first pipe cavity is a sealed cavity which is vertically arranged, the four first connecting pipes are vertically arranged, the lower ends of the four first connecting pipes extend into the first pipe cavity from top to bottom and are communicated with the first pipe cavity, and the upper ends of the four first connecting pipes are connected and communicated with the lower ends of the four vertical heat exchange pipes in a one-to-one correspondence mode.

Further, the lower end of the first lumen is tapered.

Further, the long double-U joint comprises a second pipe cavity and four second connecting pipes, wherein the second pipe cavity is a vertical closed cavity, the inside of the second pipe cavity is divided into two independent subchambers through partition, the four second connecting pipes are all vertically arranged, the four second connecting pipes are divided into a group in pairs, the lower ends of the two second connecting pipes in each group respectively correspond to the two subchambers and are communicated with the corresponding subchambers, the upper ends of the two groups respectively have one upper end of the second connecting pipe which corresponds to the lower ends of the two vertical heat exchange pipes in one-to-one mode, and the upper ends of the two remaining second connecting pipes in the two groups are connected and communicated with the lower ends of the remaining two vertical heat exchange pipes in one-to-one mode.

Further, the lower end of the second lumen is tapered.

Further, the height of the long double U-shaped joint is 400+/-50 mm.

The beneficial effects of the utility model are as follows: the structure design is simple and reasonable, the pipe can be pressed down under the pressure, the long double-U joint has larger sand soil impurity deposition space, the deposition time can be prolonged, the risk of pipeline blockage is reduced, meanwhile, only one waste pipe is used in the pipe laying process, the pipe loss is reduced, the layered excavation of earthwork is not influenced, and the excavation difficulty and the excavation cost are reduced; in addition, the construction machine is not required to be cared after a large amount of manual work is not required, and construction management difficulty and safety risk are effectively reduced.

Drawings

FIG. 1 is a schematic diagram of a vertical buried pipe for underground construction of a pipe laying of a ground surface drilling type deep foundation pit ground source heat pump system under pressure;

FIG. 2 is a schematic diagram of a structure of a single U joint in a vertical buried pipe for a pressure pipe of a surface drilling type deep foundation pit ground source heat pump system;

FIG. 3 is a schematic structural view of one embodiment of a long double U-joint in a vertical buried pipe for a pressurized lower pipe of a surface drilling type deep foundation pit ground source heat pump system of the present utility model;

Fig. 4 is a schematic structural view of another embodiment of a long double-U joint in a vertical buried pipe for a pressurized lower pipe of a surface drilling type deep foundation pit ground source heat pump system according to the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. A vertical heat exchange tube; 2. a pressure injection bearing pipe; 3. a single U-joint; 4. a long double U-joint; 5. a tube cap; 31. a first U-shaped tube; 41. a first lumen; 42. a first connection pipe; 43. a second lumen; 44. a second connection pipe; 45. partition; 311. and plugging the pipe section.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

Examples: as shown in fig. 1, the vertical buried pipe for the under-pressure pipe of the earth surface drilling type deep foundation pit earth source heat pump system of the present embodiment includes four vertical heat exchange pipes 1, a pressure injection joint pipe 2, a single U joint 3, a long double U joint 4 and a pipe cap 5, the four vertical heat exchange pipes 1 are vertically arranged, wherein the upper ends of the two vertical heat exchange pipes 1 are connected and communicated in a sealing manner through the single U joint 3, the pressure injection joint pipe 2 is vertically arranged, the lower end of the pressure injection joint pipe is connected and communicated with the upper end of the other vertical heat exchange pipe 1 in a sealing manner, the pipe cap 5 is mounted at the upper end of the remaining vertical heat exchange pipe 1 in a sealing manner, and the long double U joint 4 is connected and communicated with the lower ends of the four vertical heat exchange pipes 1.

In the embodiment, the upper ends of the vertical heat exchange tubes 1 are 100-150 mm higher than the top elevation of the designed raft foundation B, wherein the upper ends of two vertical heat exchange tubes 1 are connected by a single U joint 3, the upper end of the other vertical heat exchange tube 1 is connected with a compression injection bearing tube 2 by a reducing tube (the length of the compression injection bearing tube 2 is adjusted according to the excavation depth of a foundation pit A), and the upper ends of the remaining vertical heat exchange tubes 1 are blocked by a tube cap 5; the lower end of the vertical heat exchange tube 1 is connected by a long double U-shaped joint 4, and the concrete construction process is as follows:

1) The vertical heat exchange tube 1 with de32 multiplied by 3.0 is cut according to the effective heat exchange depth of 1-2 m; (the actual drilling depth meeting the specification is preferably 1-2 m greater than the designed hole depth);

2) A single U joint 3 is selected and connected with the upper ends of two of the two de32 multiplied by 3.0 vertical heat exchange tubes 1 in a hot melting/electric melting mode;

3) Intercepting de 40X 3.7 (which is larger than a vertically buried heat exchange tube by one type), and the length of the injection-compression joint pipe 2 can be referred to the excavation depth of the foundation pit A, and the upper end of the injection-compression joint pipe is ensured to be higher than the ground after the pipe is completely arranged;

4) Selecting a finished product reducing pipe D, and connecting another de32 multiplied by 3.0 vertical heat exchange pipe 1 and a de40 multiplied by 3.7 injection-compression joint pipe 2;

5) A pipe cap 5 is selected and connected with the upper end of the rest vertical heat exchange pipe 1 with the de of 32 multiplied by 3.0 in a hot melting/electric melting mode;

6) A long double U-shaped joint 4 with the height of 400+/-50 mm is selected and connected with the lower end of the de32 multiplied by 3.0 vertical heat exchange tube 1 in a hot melting/electric melting mode;

7) The first hydraulic test is carried out according to the standard requirement before the drill hole is inserted after the assembly is finished, the test pressure is not less than 1.2MPa, the pressure stabilization is not less than 15min under the test pressure, the pressure drop is not more than 3%, and no leakage phenomenon exists;

8) After the test is qualified, the test pressure is reduced to 0.6MPa, the drill hole is inserted in a pressurized state, and the pressure is maintained for 1h after backfilling is finished;

9) After the pressure maintaining is finished, a metal pipe plug C is put into the pipe orifice of the upper end of the vertical heat exchange pipe 1 connected with the pipe plug C through the injection pressure bearing pipe 2, the pipe plug overcomes the buoyancy of water in the pipe by self gravity and descends to the inside of the reducing pipe to be firmly clamped;

10 After the foundation pit earthwork is excavated, the position of the buried heat exchange hole can be determined through a de40 pipe (a grouting joint pipe 2) which is higher than the ground, the hydraulic test is carried out again after the reducing pipe is cut off, the completeness and the working reliability of the buried pipe are checked, and the pipe under the pressure of the water belt is completed when the design requirement is met.

The metal pipe plug is a trapezoid round table, the upper part is wide in upper part and narrow in lower part, a gap of about 1-2 mm is reserved between the upper part and the pipe wall of the de40 pipe (the injection-compression joint pipe 2), the metal pipe plug can smoothly slide into the reducing pipe, and the lower part is determined according to the dimensions of the reducing pipe and the inner wall of the de32 vertical heat exchange pipe 1, so that the clamping in the reducing pipe is ensured. If the foundation pit is deeper, the de40 pipe (the injection joint pipe 2) is in an arc bending state, so that the metal pipe plug is prevented from being blocked midway, and the metal pipe plug can smoothly reach the inside of the reducing pipe, and a marked rope with scales can be used for assisting in knowing the descending state of the pipe plug.

The long double U-shaped joint 4 is adopted in the whole design, even if small-particle sand enters the buried heat exchange tube in the process of layered excavation of foundation pit earthwork, the long double U-shaped joint 4 has a larger sand impurity deposition space, the deposition time can be prolonged, and the pipeline is not blocked. Meanwhile, the two de32 vertical heat exchange pipes 1 are plugged by adopting a single U joint 3 and a pipe cap 5, wherein one de32 vertical heat exchange pipe 1 is connected with a de40 pipe (injection joint pipe 2) by adopting a reducing pipe, on one hand, the position of a buried heat exchange hole can be determined by the de40 pipe (injection joint pipe 2) which is higher than the ground, on the other hand, only one waste pipe is arranged in the excavation depth range of a foundation pit, so that the pipe loss is reduced, the layered excavation of earthwork is not influenced, and the excavation difficulty and the excavation cost are reduced; in addition, the construction machine is not required to be cared after a large amount of manual work is not required, and construction management difficulty and safety risk are effectively reduced.

In this embodiment, as shown in fig. 2, the single U-shaped joint 3 includes a first U-shaped tube 31, two ends of the first U-shaped tube 31 are respectively provided with a plug-in tube section 311, and the plug-in tube sections 311 at two ends of the first U-shaped tube 31 are respectively plugged and sealed with the upper ends of two of the vertical heat exchange tubes 1.

In this embodiment, the structure of the long double U-joint 4 at least includes the following:

1) As shown in fig. 3, the long double-U-joint 4 includes a first lumen 41 and four first connecting pipes 42, wherein the first lumen 41 is a closed cavity vertically arranged, the four first connecting pipes 42 are all vertically arranged, the lower ends of the four first connecting pipes extend into the first lumen 41 from top to bottom and are communicated with the first lumen 41, and the upper ends of the four first connecting pipes 42 are connected and communicated with the lower ends of the four vertical heat exchange pipes 1 in a one-to-one correspondence.

In the scheme 1), four first connecting pipes 42 are communicated with the cavity in the first pipe cavity 41, after construction is completed, any two vertical heat exchange pipes 1 are selected for water inflow, and the rest two water outlets are used for realizing 'two-in and two-out' which are mutually communicated.

Wherein, the lower end of the first lumen 41 is tapered.

2) As shown in fig. 4, the long double-U joint 4 includes a second pipe cavity 43 and four second connecting pipes 44, the second pipe cavity 43 is a closed cavity vertically arranged, the interior of the second pipe cavity is divided into two independent sub-cavities by a partition 45, the four second connecting pipes 44 are vertically arranged, the four second connecting pipes 44 are divided into two groups, the lower ends of the two second connecting pipes 44 of each group respectively extend into the two sub-cavities and are communicated with the corresponding sub-cavities, the upper ends of the two groups respectively have the upper ends of the second connecting pipes 44 respectively in one-to-one correspondence with the lower ends of the two vertical heat exchange pipes 1 (here, the two vertical heat exchange pipes 1 refer to two heat pipes connected with the single-U joint 3), and the upper ends of the remaining two second connecting pipes 44 in the two groups are connected with the lower ends of the remaining two vertical heat exchange pipes 1 in one-to-one correspondence.

In the scheme 2), two groups of second connecting pipes 44 are required to be independently communicated, after construction is completed, two vertical heat exchange pipes 1 connected with two of the two groups of second connecting pipes 44 are selected to feed water, and the remaining two vertical heat exchange pipes 1 are discharged, so that two groups of independent 'two-in and two-out' are realized.

Wherein, the lower end of the second lumen 43 is tapered.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the embodiments of the present utility model have been illustrated and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the present utility model, and that changes, modifications, substitutions and variations may be made by those skilled in the art within the scope of the present utility model, which is to be regarded as preferred embodiments of the present utility model, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the present utility model are intended to be included within the scope of the present utility model.

Claims (7)

1. The utility model provides a ground drilling formula deep basal pit ground source heat pump system presses vertical buried pipe for pipe down which characterized in that: including four perpendicular heat exchange tube (1), annotate pressure bearing pipe (2), single U joint (3), long two U joint (4) and pipe cap (5), four perpendicular heat exchange tube (1) vertical setting, wherein two perpendicular heat exchange tube (1)'s upper end is passed through single U joint (3) sealing connection and intercommunication, annotate pressure bearing pipe (2) vertical setting, its lower extreme and another perpendicular heat exchange tube (1)'s upper end sealing connection and intercommunication, the remaining one perpendicular heat exchange tube (1)'s upper end sealing mounting pipe cap (5), long two U joint (4) and four perpendicular heat exchange tube (1)'s lower extreme is connected and is communicated.

2. The vertical buried pipe for a pressurized lower pipe of a surface drilling type deep foundation pit ground source heat pump system according to claim 1, wherein the vertical buried pipe is characterized in that: the single U joint (3) comprises a first U-shaped pipe (31), two ends of the first U-shaped pipe (31) are respectively provided with a plug pipe section (311), and the plug pipe sections (311) at two ends of the first U-shaped pipe (31) are respectively plugged and sealed with the upper ends of two of the vertical heat exchange pipes (1).

3. The vertical buried pipe for a pressurized lower pipe of a surface drilling type deep foundation pit ground source heat pump system according to claim 1, wherein the vertical buried pipe is characterized in that: the long double-U joint (4) comprises a first pipe cavity (41) and four first connecting pipes (42), wherein the first pipe cavity (41) is a closed cavity body which is vertically arranged, the four first connecting pipes (42) are vertically arranged, the lower ends of the four first connecting pipes extend into the first pipe cavity (41) from top to bottom respectively and are communicated with the first pipe cavity (41), and the upper ends of the four first connecting pipes (42) are connected and communicated with the lower ends of the four vertical heat exchange pipes (1) in a one-to-one correspondence mode respectively.

4. A vertical buried pipe for a pressurized pipe of a surface drilling type deep foundation pit ground source heat pump system according to claim 3, wherein: the lower end of the first pipe cavity (41) is in a cone shape.

5. The vertical buried pipe for a pressurized lower pipe of a surface drilling type deep foundation pit ground source heat pump system according to claim 1, wherein the vertical buried pipe is characterized in that: the long double-U joint (4) comprises a second pipe cavity (43) and four second connecting pipes (44), wherein the second pipe cavity (43) is a sealed cavity which is vertically arranged, the inside of the second pipe cavity is divided into two independent subchambers through a partition (45), the four second connecting pipes (44) are vertically arranged, the four second connecting pipes (44) are divided into one group, the lower ends of the two second connecting pipes (44) of each group respectively correspond to extend into the two subchambers and are communicated with the corresponding subchambers, one of the two groups is respectively connected and communicated with the lower ends of two vertical heat exchange pipes (1) in one-to-one correspondence to the upper ends of the second connecting pipes (44), and the other two groups are connected and communicated with the lower ends of the other two vertical heat exchange pipes (1) in one-to-one correspondence to the upper ends of the second connecting pipes (44).

6. The vertical buried pipe for a pressurized lower pipe of a surface drilling type deep foundation pit ground source heat pump system according to claim 5, wherein the vertical buried pipe is characterized in that: the lower end of the second pipe cavity (43) is in a cone shape.

7. A vertical buried pipe for a pressurized lower pipe of a surface drilling type deep foundation pit ground source heat pump system according to any one of claims 1 to 6, wherein: the height of the long double-U joint (4) is 400+/-50 mm.